Journal articles: 'Traction torque'

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Baek, Seung-Yun, Seung-Min Baek, Hyeon-Ho Jeon, Wan-Soo Kim, Yeon-Soo Kim, Tae-Yong Sim, Kyu-Hong Choi, Soon-Jung Hong, Hyunggun Kim, and Yong-Joo Kim. "Traction Performance Evaluation of the Electric All-Wheel-Drive Tractor." Sensors 22, no. 3 (January 20, 2022): 785. http://dx.doi.org/10.3390/s22030785.

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This study aims to design, develop, and evaluate the traction performance of an electric all-wheel-drive (AWD) tractor based on the power transmission and electric systems. The power transmission system includes the electric motor, helical gear reducer, planetary gear reducer, and tires. The electric system consists of a battery pack and charging system. An engine-generator and charger are installed to supply electric energy in emergency situations. The load measurement system consists of analog (current) and digital (battery voltage and rotational speed of the electric motor) components using a controller area network (CAN) bus. A traction test of the electric AWD tractor was performed towing a test vehicle. The output torques of the tractor motors during the traction test were calculated using the current and torque curves provided by the motor manufacturer. The agricultural work performance is verified by comparing the torque and rpm (T–N) curve of the motor with the reduction ratio applied. The traction is calculated using torque and specifications of the wheel, and traction performance is evaluated using tractive efficiency (TE) and dynamic ratio (DR). The results suggest a direction for the improvement of the electric drive system in agricultural research by comparison with the conventional tractor through the analysis of the agricultural performance and traction performance of the electric AWD tractor.

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Samsonov, V. A., and Yu F. Lachuga. "Optimization of traction characteristics of agricultural tractors." Traktory i sel hozmashiny 84, no. 11 (November 15, 2017): 49–56. http://dx.doi.org/10.17816/0321-4443-66355.

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The productivity of the machine-tractor unit depends on the energy saturation of the tractor. It is assumed that the optimum traction characteristic corresponds to the minimum operating weight of the tractor and its maximum energy saturation, at which the maximum productivity of the machine and tractor unit is achieved with the lowest fuel consumption and compliance with restrictions on tractive effort, slippage and theoretical speed. As a criterion for determining the maximum energy saturation, the maximum efficiency coefficient is adopted with maximum tractive power and maximum tractive efficiency. Calculation of the optimal traction characteristics is an actual task of the theory of the tractor. The purpose of the study is to develop a methodology and algorithms for calculating the indicators of the optimal traction characteristics of the tractor when the engine speed of the crankshaft is changed. The objects of research are wheeled and caterpillar tractors of general purpose. Input data: engine and tractor performance indicators; coefficients that characterize the traction and coupling properties of the tractor; the tractor power balance equation; slipping functions; the dependence of the fuel consumption of the engine and its torque on the speed of the crankshaft. The method of research is the calculation using the basic formulas of the theory of the tractor when the speed of the crankshaft is changed by one rotation. Taking into account the accepted values of the nominal engine speed and the torque adaptive factor, the gear ratio is calculated. The calculation procedure for the optimum traction characteristic is developed for tractors with a minimum operating weight, calculated taking into account the nominal tractive effort and the coefficients of using the gravity of the tractors. The maximum energy saturation for each type and traction class of the tractor is determined by calculating the tractive characteristic of the transmission, at which the maximum efficiency factor, traction power and traction efficiency are reached. The main conclusion: the optimum traction characteristic corresponds to the minimum operating weight of the tractor and its maximum energy saturation.

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Kim, Wan-Soo, Yeon-Soo Kim, and Yong-Joo Kim. "Development of Prediction Model for Axle Torque of Agricultural Tractors." Transactions of the ASABE 63, no. 6 (2020): 1773–86. http://dx.doi.org/10.13031/trans.14012.

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HighlightsA prediction model was developed for estimating the axle torque of an agricultural tractor.The model was developed by complementing and modifying a previously proposed traction equation.Compared to the actual axle torque, the proposed model attained MAPE of 2.1%, RMSE of 29 Nm, and RD of 2.7%.The model predicted axle torque more accurately than the traction force-based prediction model.Abstract. The tractor driving axle torque is an important factor in optimal transmission design and service life evaluation. Axle torque measurement sensor systems are very expensive, and traction force-based axle torque prediction models cannot accurately estimate the axle torque because they do not consider both the conditions of the tractor and the attached implement. Therefore, in this study, a prediction model was developed to estimate the axle torque of an agricultural tractor based on the traction force equation and motion resistance. A load measurement system was established to verify the developed prediction model, and actual field torque data were collected through field tests. The developed prediction model was verified by comparing the results of five reference prediction methods, including weight, engine-rated torque, and three traction equations (Wismer-Luth, ASABE Standard D497.4, and Brixius), using the measured axle torque. Performance evaluation was conducted based on the main variables, including travel speed, tillage depth, and slip ratio. The proposed prediction model was found to be closest to the 1:1 line at all travel speeds, tillage depths, and slip ratios, implying that it can best explain the measured torque values among all prediction models. Compared to the other prediction models, the proposed prediction model’s results under all variable conditions had an R2 of 0.65, MAPE of 2.1%, RMSE of 29 Nm, and RD of 2.7%, indicating excellent prediction of the measured torque. The results show that the developed prediction model can be applied to axle torque prediction by explaining the actual measured axle torque. Keywords: Agricultural tractor, Axle torque, Prediction model, Torque estimation, Traction force.

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Wu, Xiao Yu, Zhe Ming Chen, and Ze Hao Huang. "Analysis and Calculation of Electromagnetic Torque for the Voltage Source Traction Motors." Applied Mechanics and Materials 446-447 (November 2013): 672–77. http://dx.doi.org/10.4028/www.scientific.net/amm.446-447.672.

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The traction motor installed on the high-speed train is powered by inverter. A large number of harmonics may appear when motor is operating. Then the motor speed generate oscillation and finally the dynamic characteristic is affected in vehicle system. In this paper, relied on the electromagnetism of traction motor, the mechanism about emerging harmonic torque is analyzed. In addition, based on the equivalent circuit, the method of calculating the parameters in harmonic circuit is proposed. Two mathematical formulas are also proposed to obtain the fundamental electromagnetic torque and the harmonic electromagnetic torque on traction motor. The time domain and frequency domain distributions of the torques are gained and analyzed. Finally a calculation example of traction motor harmonic torque was analyzed and calculated, and prepared for further study of harmonic torque impacting on vehicle system dynamic performance.

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Li, Qingtao, Li Liang, Chao Li, Runtao Li, Chongyong Yan, and Shengzhen Liu. "Characteristic Investigation and Torque Distribution Diagram-Based Computational Method for Continuously Variable Power-Split Transmission." Mathematical Problems in Engineering 2022 (February 28, 2022): 1–15. http://dx.doi.org/10.1155/2022/6136766.

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The key parameter of power-split transmission is the planetary ratio. To obtain various planetary ratios in one transmission system, people use complex systems with multiple planetary gear trains, clutches, and brakes. Another solution is replacing the planetary gear train with a planetary traction drive. However, the participation of the planetary traction drive brings about creep and spin motion, which increase the difficulty of precise calculation. In this study, we investigate the relationships between torques and speeds. Then, we derive the torque and speed distribution formulas that consider the influence of spin torque and creep motion. This study is the first step to precisely calculate the emerging power-split transmission with the planetary traction drive. Based on a contact model and a proposed torque distribution diagram method, this study proposes a fast computational method for calculating the performance of the new continuously variable power-split transmission. The results show that the proposed torque distribution diagram-based computational method is feasible, and the planetary traction drive can be a competitive power-split device for power-split transmission.

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Liu, Jianhua, Rui Nie, and Zheshu Li. "Multimotors Coordination Control Method for Consistent Total Traction Torque of Electric Locomotives." Journal of Advanced Transportation 2020 (September 1, 2020): 1–11. http://dx.doi.org/10.1155/2020/2092463.

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Multimotors traction is a common driving mode for electric locomotives. The complexity and variability of the operating environment often cause difficulties for one or some traction motors to output the distributed traction torque, which requires the redistribution of the torque output of multimotors to maintain the total traction torque of all motors at a given constant. To this end, a multimotors coordination control method was proposed for consistent total traction torque of electric locomotives. Through this approach, a traction torque-coordinated control structure was constructed on the basis of energy minimisation with an optimal dynamic adjustment mode. The sliding mode tracking control was developed for each independent motor to improve its dynamic response performance. A simulation verification of motors fault types in two different cases was conducted. The results showed that the proposed method could track the total traction torque in a short time, and the system fluctuations in independent motor coordination process were very small.

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Geonea, Ionut, Nicolae Dumitru, Alexandru Margine, and Petre Cristian Copilusi. "Experimental Investigations Concerning Friction from Threaded Assemblies." Applied Mechanics and Materials 880 (March 2018): 33–38. http://dx.doi.org/10.4028/www.scientific.net/amm.880.33.

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In this research an experimental test rig and method to measure friction torque from screw-nut assemblies is presented. The experimental test rig uses to measure friction torque an elastic cylinder bush with strain gauge transducers. The frictions torque and the traction force from the threaded assembly are transmitted to the elastic cylinder bush and produce elastic deformations. The elastic cylinder is calibrated in order to establish a correlation between elastic deformation and force of solicitation. In order to measure the experimental data the MGCPlus data acquisition system is used. The experimental results obtained are presented, consisting in the dependence between friction torques and axial traction force occurred in the screw.

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Samsonov, V. A., and Yu F. Lachuga. "Calculation of the parameters of the corrector section of the speed characteristics tractor engine." Traktory i sel hozmashiny 85, no. 5 (October 15, 2018): 20–25. http://dx.doi.org/10.17816/0321-4443-66390.

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One of the main indicators of the corrector section of the high-speed characteristics of the tractor engine is its torque adaptability factor. The article describes the method of General solution of the problem of calculation of this coefficient. The method is to minimize the difference between the two functions (optimality criterion): the first - the dependence of the denominator of the geometric series of gears on the coefficient of adaptability, the second-the dependence of the denominator on the tractor power range, that is, the ratio of the tangential thrust force in the last gear to the same force in the first gear. Taking into account the found coefficient of adaptability by the moment, the rotation frequency of the motor shaft at the maximum torque, the coefficient of adaptability of the engine by the shaft speed, the traction and speed ranges, the theoretical speed in the last gear are determined. The speed of the shaft at the maximum torque is determined from the condition that the engine load factor by power at the maximum torque is equal to 0,85. The power range is determined by the results of minimization of the optimality criterion, the speed range is equal to C-low. The speed of the tractor in the last gear is determined taking into account the given speed in the first gear and the found speed range. The generally accepted range of minimum values of the coefficient of adaptability, based on the time increase in traction resistance, is 1,15...1,20. In some modern tractor engines, this co-efficiency is greater than 1,2. The aim of the article is to optimize the interval of adaptability coefficient values greater than 1,2. The object of study - the engine of a wheeled tractor traction class 3. The initial material-nomi-nal traction and weight of the tractor, its traction range, the interval of theoretical speed in first gear. Research methods-nel programming using the minimization of the convex function; approximation of the linear function of the torque dependence on the current speed of the shaft. The main conclusion: given the accepted criterion of optimality, constraints, and the coefficient of variation moment of resistance of the optimum the coefficient of adaptability at the twisting mo-ment of tractor engines comply with the interval of 1,27 to 1,45.

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Wang, Neng Jian, Li Jie Zhou, Qiang Song, and De Fu Zhang. "Simulation Research on Braking Safety Properties of Aircraft Traction System." Key Engineering Materials 419-420 (October 2009): 705–8. http://dx.doi.org/10.4028/www.scientific.net/kem.419-420.705.

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The jack-knifing tendency of aircraft traction system during braking was discussed and analyzed using multi-body dynamics models that consist of aircraft-towing tractor, aircraft draw link and aircraft. The braking critical conditions of the aircraft traction system for straight-line braking and turning braking were discussed and analyzed respectively. In the case of straight-line braking, the effect of friction coefficient on the maximum braking torque is described. In the case of turning braking, the relationship between the maximum baking torque and relative angle is obtained.

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Li, Hao, Zheng He Song, and Bin Xie. "Plowing Performance Simulation and Analysis for Hybrid Electric Tractor." Applied Mechanics and Materials 365-366 (August 2013): 505–11. http://dx.doi.org/10.4028/www.scientific.net/amm.365-366.505.

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According to plowing operation characteristics, a case study on a parallel HET (hybrid electric tractor) with the torque combinator is conducted to develop a plowing operation performance simulation system. The mathematical models of drive equilibrium, battery, power combinator and control system are established respectively. A simulation system for evaluating the tractive performance, fuel economy, battery characteristics and controller performance of HET is developed in the environment of MATLAB/Simulink. Simulation results suggest that: in this HET, the output torque and traction vary in a large range with the variations in the operation modes and SOC level of the battery; in the common interval of SOC (0.4~0.7), compared with the traditional tractor, HET can achieve larger output torque with a fuel consumption reduction of 18% ~20% in discharge mode; with the capability of keeping the battery charge-discharge stage stable and guaranteeing the SOC variation in a small range, the controller meets with the requirements of plowing operation and benefits the stability of the tractor power and the extension of battery life cycle.

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Ovsyannikov, E. M., B. A. Ivobotenko, V. M. Yurkevich, and E. M. Koshelyev. "Direct torque control of asynchronous traction motor." Izvestiya MGTU MAMI 7, no. 2-1 (January 20, 2013): 188–94. http://dx.doi.org/10.17816/2074-0530-68300.

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This paper proposes a new system of direct torque control of asynchronous traction motor with space vector modulation of voltage supply. The results of the simulation of traction asynchronous traction motor show advantages of the developed control system: simplicity of implementation, high dynamic performance and small fluctuations of the electromagnetic torque.

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Liu, Mengnan, Liyou Xu, and Zhili Zhou. "Design of a Load Torque Based Control Strategy for Improving Electric Tractor Motor Energy Conversion Efficiency." Mathematical Problems in Engineering 2016 (2016): 1–14. http://dx.doi.org/10.1155/2016/2548967.

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In order to improve the electrical conversion efficiency of an electric tractor motor, a load torque based control strategy (LTCS) is designed in this paper by using a particle swarm optimization algorithm (PSO). By mathematically modeling electric-mechanical performance and theoretical energy waste of the electric motor, as well as the transmission characteristics of the drivetrain, the objective function, control relationship, and analytical platform are established. Torque and rotation speed of the motor’s output shaft are defined as manipulated variables. LTCS searches the working points corresponding to the best energy conversion efficiency via PSO to control the running status of the electric motor and uses logic and fuzzy rules to fit the search initialization for load torque fluctuation. After using different plowing forces to imitate all the common tillage forces, the simulation of traction experiment is conducted, which proves that LTCS can make the tractor use electrical power efficiently and maintain agricultural applicability on farmland conditions. It provides a novel method of fabricating a more efficient electric motor used in the traction of an off-road vehicle.

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Speth, Peter, Andreas Hummler, Michael Buchholz, and Klaus Dietmayer. "Instability detection of the tire-road contact and torque control for wheel-individual driven vehicles." at - Automatisierungstechnik 66, no. 1 (January 12, 2018): 41–52. http://dx.doi.org/10.1515/auto-2017-0091.

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Abstract Traction control for vehicles with wheel individual drives is a challenging task, since the wheel slips are unknown when each wheel transfers a torque. This contribution presents an approach which deals with this problem especially for electrical vehicles, where the drive torques can be changed very fast in comparison to vehicles with combustion engines. The algorithm is based on two filters. The first filter is an adaptive Kalman filter which is used to detect fast changes in the stability conditions of the wheels. The filter also delivers a valuation for the torque to which the drive torque has to be reduced to get the wheel stable again. The second filter estimates the wheel slip. It is based on a simplified expression of the slip dynamics in combination with a special reset strategy for low slip situations. This filter allows detection of slow changes in the stability conditions. All filters are wheel individual and use only standard sensor information. No tire model is needed for the filters to work. A simple reflexive traction controller, which is based on a state machine, computes the drive torques in dependence on the stability criteria based on the filter outputs.

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Gao, You Shan, Zhi Song, Ai Hong Wang, and Ze Kun Jin. "Dynamic Simulation for Rolling Impact Compaction Machine." Advanced Materials Research 430-432 (January 2012): 1610–13. http://dx.doi.org/10.4028/www.scientific.net/amr.430-432.1610.

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Through established the simulation model for the engine and the traction host powertrain of rolling impact compaction machine, Simulated the working load with time history with the simulation parameters of rolling impact compaction machine. The simulation accuracy was verified by compared between the test speed and the simulation speed. The speed, turbine torque, torque converter efficiency, torque converter, gear ratios, fuel consumption, engine power, torque are dynamic changes follow with the alternating load and slope load so as to adapt to the dynamic drag torque fluctuations. Traction host power must be equipped with a full host transmission of the internal combustion engine. Driveline should be hydraulic transmission fluid or hydraulic machinery.

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Kholodilin, I. Yu, A. V. Korzhov, M. A. Grigoriev, Yu I. Khokhlov, and N. V. Savosteenko. "Highly efficient electric drive with vision system for traction applications in heavy tracked vehicles." Omsk Scientific Bulletin, no. 180 (2021): 41–47. http://dx.doi.org/10.25206/1813-8225-2021-180-41-47.

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A new type of electric motor as a traction drive DET400 based on a field regulated reluctance machine (FRRM) provides high energy efficiency and high specific torque. A comparison is made between FRRM and various types of traction electric drives. The issues of designing the FRRM are considered, the geometric parameters of the electric machine are optimized to achieve the maximum specific indicators. To expand the functionality and ensure operational safety, it is proposed to introduce computer vision into the electronic control system. As a result, the FRRM is designed for traction applications based on the real requirements of a Russian-made crawler tractor.

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Lingaitis, Leonas Povilas, and Lionginas Liudvinavičius. "ELECTRIC DRIVES OF TRACTION ROLLING STOCKS WITH AC MOTORS." TRANSPORT 21, no. 3 (September 30, 2006): 223–29. http://dx.doi.org/10.3846/16484142.2006.9638070.

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The paper considers the variation of circuit design of the electric drives in traction rolling stocks when traditional DC electric machines are replaced with AC electric machines. Simplified circuit diagrams of the electric drives using electric machines of non‐commutator type are offered. Operational defects of DC traction engines are weighed against some positive characteristics of direct current series excitation in traction engines, determining their extensive use in the electric drives of traction rolling stocks. However, the rapid development of semiconductor devices, e.g. thyristors and IGBT transistors, led to the creation of a great variety of semiconductor inverters. This made it possible to develop an autonomous three‐phase power supply system for diesel locomotives and algorithms for the AC traction motors and to obtain engine characteristics matching the tractive force by using voltage frequency and current inverters. A mathematical justification of the engine torque and tractive force control as well as its particular characteristics is provided. The graphs demonstrating the particular ways of changing the electrical parameters of an asynchronous motor with a squirrel‐cage rotor are also presented.

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DOROFEEV, O. V., V. I. VOROBYEV, M. I. BORZENKOV, O. V. IZMEROV, and S. N. ZLOBIN. "TRACTION DRIVE OF LOCOMOTIVES WITH HIGH MOMENTUM COLLECTOR TRACTION ELECTRIC MOTOR." Fundamental and Applied Problems of Engineering and Technology 2 (2021): 118–29. http://dx.doi.org/10.33979/2073-7408-2021-346-2-118-129.

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The issues of development of traction drives of locomotives are considered. It was found that with the existing limitations of the traction force and the speed of continuous operation, asynchronous traction motors do not have clear advantages over collector motors. The possibility of creating collector motors for electric locomotives with a power equal to the used asynchronous ones has been proved, new technical solutions have been proposed for units that ensure the reliability of the latter when using high-torque motors (elastic gearwheel with chevron teeth, two-layer rubber-metal hinge, rubber-cord clutch options), as an optimal solution for the drive with collector motors, it is proposed to use a drive with a support frame motor and an axial gearbox. The directions of research necessary for the practical implementation of drives with a high-torque traction motor are determined, it is proposed to conduct research on the feasibility of creating diesel locomotives with bogies, unified with electric locomotives. The proposed solutions received two patents for inventions, eight patents for utility models, two patent applications were filed.

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Zhu, Xiao Yu, and Jian Yong Zuo. "Power Consumption Analysis of High-Speed Train’s Brake Discs." Advanced Materials Research 765-767 (September 2013): 120–24. http://dx.doi.org/10.4028/www.scientific.net/amr.765-767.120.

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Apart from the aerodynamic drag produced by transitional motion of high-speed train, the rotational parts of the train, especially the ventilated discs mounted on axles, would also cause resistance torques due to air pumping effect, which consume traction power. In this paper the train running process is divided into traction, uniform running and braking three phases, then the power consumed by the brake discs as well as the proportion of which in total traction or braking power during the three periods is calculated based on kinetic energy theorem. The results indicate that, during traction and uniform running period, the power consumption of brake discs shares 2.84% and 12.87% of total traction power, and in brake stage, the proportion is 0.78%. What is more, in the uniform running phase, the proportion of brake discs power consumption caused by resistance torque can reach to 7.68%. If the air inlet of brake disc is blocked during traction and uniform running period to weaken air pumping effect, the useless power consumption can be effectively reduced and the traction efficiency can be improved.

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Bandel, P., and C. Di Bernardo. "A Laboratory Facility for the Study of Rubber Traction and Wear Resistance." Tire Science and Technology 18, no. 3 (July 1, 1990): 201–13. http://dx.doi.org/10.2346/1.2141700.

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Abstract Phenomena occurring at the interface between the tread compound and the road surface are responsible for at least two main tire characteristics: traction capability and wear resistance. Both depend on the road surface geometry, the presence of thin films of water, local contact pressure, tread element stiffness, temperature, tangential slip, etc. To discount the effect of tire construction, a laboratory test using a small solid rubber wheel has been considered. A rig is designed to easily change the “road” surface, and convert it from wet to dry conditions, run the rubber wheel on such surfaces under high braking or driving torque, and measure torque against longitudinal slip. The rig features a flat disk on which different surfaces can be simulated and two separate electric motors driving the disk and the test wheel in order to control slip instead of torque and to avoid instability at high driving or braking torques. Results show longitudinal characteristics versus slip in different test conditions and simulation of severe abrasion conditions leading to typical abrasion patterns.

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Zheng, Xiang Pan, and Shu Mei Chen. "Analysis and Design of MRF Elevator Traction Transmission Device." Applied Mechanics and Materials 365-366 (August 2013): 395–400. http://dx.doi.org/10.4028/www.scientific.net/amm.365-366.395.

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A magneto-rheological fluid (MRF) elevator traction transmission is a device to transmit torque by the shear force of MR fluid. The development and principle of MRF transmission device are presented. Then the design method of the MRF transmission is investigated theoretically. The model of the torque transmitted by the MR fluid within the brake is derived to provide the theoretical foundation in the MRF elevator traction transmission design of the brake. Based on this model, after mathematical manipulation, the calculations of the structure and width of the MRF elevator traction transmission are yielded.

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Parhomenko, S. G., and G. G. Parhomenko. "Mathematical modeling of functioning of a tillage machine-tractor unit." Traktory i sel hozmashiny 85, no. 4 (August 15, 2018): 55–62. http://dx.doi.org/10.17816/0321-4443-66405.

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The soil-cultivating machine-tractor unit undergoes continuously changing external influences that lead to fluctuations in the speed of movement, slippage of the tractor's driving wheels, loading of the transmission, and increased fuel consumption. The main sources of disturbances that cause the oscillations of the tractor are the unevenness of the traction resistance of the tillers and the unevenness of the field microprofile. The purpose of the research is to improve the process of functioning of the soil-processing machine-tractor unit by modeling of the influence of external action. The mathematical model of the process of operation of a wheeled tractor in the traction mode of operation is a machine-tractor unit in the form of a dynamic system with two input forces, determined by the load on the working elements and the roughness of the relief. The mathematical model includes the equations of the motor and the regulator, the clutch, the power transmission, the driving wheel and the longitudinal-vertical oscillations of the tractor. The solution of the mathematical model of the machine-tractor unit is based on the fourth-order Runge-Kutta numerical integration method at a constant step. Calculations are made for the motion of the unit with periodic sinusoidal disturbances applied to the input of the model. As a result of calculations, it is determined that the effect of the microfield of the field and the traction resistance of the working bodies on the performance of the machine-tractor unit is different. The greatest amplitudes of vertical accelerations are achieved due to the effect of field unevenness. Fluctuations in the speed of movement, hectare fuel consumption, engine torque are caused by the periodic component of traction resistance of low frequency, and slippage and driving torque of the wheels - as well as unevenness of the field microfilm. The average values of the slippage of the tractor's driving wheels and hectare fuel consumption are mainly affected by the oscillations of the traction resistance. The use of diagonal-parallel tires instead of radial makes it possible to reduce the slipping of the tractor's drive wheels from 24 % (when working on serial tires) to 16 % (on test tires) and to reduce the hectare fuel consumption by 6 %.

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Hu, Jian Jun, Zheng Bin He, Peng Ge, and Da Tong Qin. "Research on Control Strategy of Traction Control for Four Wheel Drive Vehicle." Advanced Materials Research 230-232 (May 2011): 1242–49. http://dx.doi.org/10.4028/www.scientific.net/amr.230-232.1242.

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In order to improve the performance of four wheel driver vehicle, structural characteristics of inter-axle torque distribution with planetary gear are analyzed, and a dynamic model of four wheel drive vehicle is established. A synthetic control strategy was proposed to achieve the engine throttle control, inter-axle torque distribution control and drive wheel brake control. Traction control system based on fuzzy logic control is designed. The simulation of traction control on split-µ road and low-µ road are carried out. The results show that, the traction control system for four wheel drive vehicle based on fuzzy control can prevent excessive slip of driving wheels, and vehicle traction property and dynamic performance are improved obviously.

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Liu, Zhijie, Guoqiang Zhang, Guoping Chu, Hanlin Niu, Yazhou Zhang, and Fuzeng Yang. "Design Matching and Dynamic Performance Test for an HST-Based Drive System of a Hillside Crawler Tractor." Agriculture 11, no. 5 (May 20, 2021): 466. http://dx.doi.org/10.3390/agriculture11050466.

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In recent years, research into and development of hillside tractors has become a popular topic in the field of agricultural engineering in China. To solve the main problems associated with a low adjustment range of the working speed, complex operation, and low safety for slope operation of medium-sized crawler tractors, a hydrostatic drive system that can be used for hillside crawler tractors was designed. According to the operation requirements of a hillside crawler tractor, the parameters of the three-cylinder diesel engine, hydrostatic transmission (HST), drive rear axle, and other key components of the drive system were matched after the force and motion analyses of the tractor, and then the main performance indicators, including the traction performance, system pressure and working speed of the drive system were verified. On this basis, a drive system performance test bench was built, and the traction performance and starting acceleration performance of the drive system was tested. The results of the traction bench test show that when the engine was at the maximum torque point of 1700 r/min, the maximum theoretical tractive force outputted by the tractor in Gear I was 114,563 N, and the maximum theoretical tractive force outputted by tractor in Gear II was 10,959.2 N, which were both larger than the traction resistance of 9550.6 N experienced by the hillside tractor ploughing on the slope. The results of the initial acceleration bench test show that the tractor driving speed can gradually increase with increasing output of the variable pump and can reach the maximum in 3 s. When the tractor was driving on flat ground, the maximum driving speeds of Gear I, Gear II, and Gear III were 4.65 km/h, 6.58 km/h, and 8.57 km/h, respectively, which are close to the theoretical values. When the tractor was driving on a 15° slope, the maximum driving speeds of Gear I, Gear II, and Gear III were 4.55 km/h, 6.25 km/h, and 8.28 km/h, respectively. It can be concluded that the design matching of the drive system is reasonable, the speed consistency is good and there is enough power reserve, which can meet the requirements for a large workload.

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Zong, Jian, Yi Ruan, Ming Hui Chen, and Li Bo Xu. "Study and Implement on the Control System of Traction Locomotive Based on Torque Current Closed-Loop." Applied Mechanics and Materials 121-126 (October 2011): 3502–5. http://dx.doi.org/10.4028/www.scientific.net/amm.121-126.3502.

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In order to overcome the poor stationarity of traction locomotive during the operation mode switching, with rotor flux oriented vector control theory based on, torque model control strategy is adopted. It can overcome the DC bus pumping as Locomotive deceleration and barking. In this system, output torque can be controlled directly, experiments verify the system has good performance of stability and reliability, which can meet the traction locomotive control requirements.

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Zubkov, Yuri V., and Vladislav E. Vereshagin. "Designing of traction motor stators core." Vestnik of Samara State Technical University. Technical Sciences Series 30, no. 4 (February 1, 2023): 102–14. http://dx.doi.org/10.14498/tech.2022.4.7.

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Electric drive is widely used in automotive practice. Its basis is an electric traction motor (TM), which, compared with an internal combustion engine (ICE), has such advantages as high efficiency, high overload capacity, a wide range of speed control, and the possibility of torque direct transmission to the drive wheels. The main requirements for a traction motor are high efficiency over the entire load range, ease of speed and torque control, high overload capacity, small weight and dimensions, regenerative braking capability, wide speed control range, simplicity and ease of maintenance. The most widely used as traction motors are synchronous electric machines with excitation from permanent magnets (PM). They are characterized by high torque density, efficiency and power consistency over a wide speed range. However, there are a number of problems that hinder the introduction of these electric machines in the traction drive of home cars, one of which is the lack of a methodology for choosing the design of an armature and an inductor at the stage of calculating the main dimensions of an TM with magnetoelectric excitation, taking into account the variety of schemes and methods of winding, PM placement in the inductor. The article deals with the issues of choosing electromagnetic loads for various cooling methods, the size of the non-magnetic gap, an algorithm for electromagnetic calculation based on the maximum torque, containing a number of refining cycles, is proposed. The values of inductances and design factors are determined by numerical simulation of the magnetic field. The features of the design and circuit design of the core and armature winding are considered. Distribution curves of magnetomotive forces of distributed and concentrated windings are obtained, their harmonic analysis is made, recommendations are given on the configuration of the TD armature active zone.

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26

Ai, Xiaolan. "Development of Zero-Spin Planetary Traction Drive Transmission: Part 2 — Performance Testing and Evaluation." Journal of Tribology 124, no. 2 (July 24, 2001): 392–97. http://dx.doi.org/10.1115/1.1405131.

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A tapered roller planetary traction drive based on a so-called zero-spin design was built for performance evaluation. The traction drive demonstrated, in many aspects, superb performance characteristics. The zero-spin design increased the torque capacity and enabled the traction drive to operate under both fully lubricated and starved lubrication conditions. The traction drive improved mechanical efficiency compared with traction drives of conventional designs and was able to achieve high efficiency up to 99 percent. The traction drive had satisfactory temperature performance.

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27

Flugrad, Donald R., and Abir Z. Qamhiyah. "A Self-Actuating Traction-Drive Speed Reducer." Journal of Mechanical Design 127, no. 4 (September 9, 2004): 631–36. http://dx.doi.org/10.1115/1.1897410.

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Traction-drive speed reducers offer certain advantages over geared speed reducers. In particular, they generally run quieter than geared units and provide an opportunity for higher efficiency by eliminating sliding motion between contacting elements. In order to generate a sufficiently high output torque, some means must be provided to create a normal force between the rolling elements. This normal force, along with the friction coefficient, enables the device to transmit torque from one rolling member to the next. The speed reducer proposed here is designed so that the configuration of the rolling elements creates the needed normal force in response to the torque exerted back on the system by the downstream loading. Thus the device is self-actuating. Since the normal force is only present when needed, the rolling elements of the device can readily be disengaged, thus eliminating the need for a separate clutch in the drive system. This feature can be exploited to design a transmission with several distinct speed ratios that can be engaged and disengaged in response to changing speed requirements.

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28

Pugachev, Alexander. "Induction Motor Traction Drive with Slipping Protection." Applied Mechanics and Materials 792 (September 2015): 101–6. http://dx.doi.org/10.4028/www.scientific.net/amm.792.101.

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The advantages and shortcomings of three-level voltage source inverters to be applied on locomotive traction electric drives are highlighted in relation to two-level ones. To protect wheels from slipping on rails, the control system is designed. The control system with protection from slipping uses system of direct torque control as the subordinated contour to produce control signals on voltage source inverter. The topology and principles of operation of both protections from slipping and direct torque control of traction induction motor with three-level voltage source inverters are described. The simplified structure of mechanical part of traction drive using basic and axle suspension is considered. The adequacy of designed control system is confirmed by means of Matlab, the results of mathematical modeling show a high convergence with the results of physical model of traction drive.

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29

Nguyen Quang Thieu and V. V. Markov. "Rational control laws asynchronous electric traction." Izvestiya MGTU MAMI 5, no. 1 (January 10, 2011): 70–76. http://dx.doi.org/10.17816/2074-0530-69863.

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The paper considers the optimal control laws for asynchronous traction electric motors to minimize various types of losses, minimize consumption of active and reactive power, maximum overload capacity. The authors established that the joint management of the maximum torque and minimum total losses in the motor is most efficient traction control law for asynchronous traction electric motors.

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Ковалев, Роман, Roman Kovalev, Алексей Тарасов, Aleksey Tarasov, Галина Федяева, Galina Fedyaeva, Георгий Михальченко, and Georgiy Mikhalchenko. "Dynamic processes in the joint regulation asynchronous traction motors truck of the locomotive." Bulletin of Bryansk state technical university 2014, no. 4 (December 5, 2014): 129–32. http://dx.doi.org/10.12737/23108.

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Examines the dynamic processes in the traction drive with direct torque control regulation asynchronous traction motors are connected in parallel to one inverter, at the limit of adhesion of the wheels and rails, the results of the simulation.

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31

Ovsyannikov, E. M., and Thieu Nguyen Quang. "Synthesis of Direct Torque Control System of Asynchronous Traction Electric Drives." Izvestiya MGTU MAMI 5, no. 2 (January 20, 2011): 41–46. http://dx.doi.org/10.17816/2074-0530-69839.

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The paper proposes a method for the synthesis of a direct torque control of asynchronous electric drives with separate control of the magnetic flow and electromagnetic torque. The authors show the results of simulation of asynchronous electric drive, advantages of the developed motor control system: ease of construction, high dynamic quality, small fluctuations of electromagnetic torque.

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32

Milic, Aleksandar, and Slobodan Vukosavic. "Designing method for integrated battery chargers in electrical vehicles." Facta universitatis - series: Electronics and Energetics 32, no. 4 (2019): 513–28. http://dx.doi.org/10.2298/fuee1904513m.

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Electrical vehicles often make use of multi-phase induction motors. At the same time, the vehicles have an on-board charger, the power electronics device that converts the ac power from the mains and charges the traction battery. The traction inverter can be integrated with the charger, reducing in this way the component count, weight and cost, while the windings of the ac motor can be used as the inductors required to complete the charger topology, thus saving on passive components, iron and copper. The integrated charger performances depend on the configuration of the stator windings as well as on the topology of the power converter. The objective in charging mode is reaching a high efficiency while keeping the charging-mode electromagnetic torque at zero. In traction mode, the goals include the efficiency and the torque-per-Amps ratio. In order to compare and distinguish between the available topologies and configurations, the paper starts with the analysis of the magnetic field in the air-gap of the electric machine in both charging and traction modes. Based upon that, a novel algorithm is proposed which determines the spacetime distribution of the air-gap field, eventually deriving all the relevant pulsating and revolving component of the magnetic field, thus providing the grounds for studying the losses, efficiency and torque pulsations in both charging and traction modes.

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Schetinin, Y. S., M. Y. Esenoskiy-Lashkov, and A. I. Sergeev. "Self-excitation of oscillations of wheeled tractors frame when working in traction mode." Izvestiya MGTU MAMI 7, no. 2-1 (January 20, 2013): 262–71. http://dx.doi.org/10.17816/2074-0530-68372.

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The article theoretically substantiates a possibility of self-excitation of oscillations of wheeled tractors frame in the longitudinal plane when working in traction mode. There was used the dependence of rolling pneumatic wheel radius from the vertical load and torque, mathematical model of a rolling pneumatic wheel with variable vertical load and dual-mass linear model of oscillations of the tractor frame in the longitudinal plane.

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34

Philpot, K., and R. Glovnea. "Dynamic and tribological analysis of a toroidal continuously variable transmissions." Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology 231, no. 4 (August 5, 2016): 453–60. http://dx.doi.org/10.1177/1350650115585332.

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The continuously variable transmission investigated in this paper works with contacts in the elastohydrodynamic regime of lubrication, thus the tangential forces between elements are transmitted through the shearing the lubricant film. The behaviour of the lubricant film when subjected to shear depends of the nature of the lubricant and the relative motion between the contacting surfaces. In this paper, a non-Newtonian behaviour is assumed for the lubricant while the relative motion is determined for every point on the contact area by kinematic methods. The net tractive force in the sliding direction and the spin torque are evaluated and from these the power losses in the contacts are calculated. The dynamic behaviour of the device is evaluated taking into account the behaviour of the lubricant as extracted from traction measurements. A simplified method for the evaluation of the dynamic response of the device to a rapid variation of the resistive torque is presented. The results show the importance of the rheological behaviour of the lubricant, measured by the slope of the linear region of lubricant traction curves.

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35

Sekara, Nagamani Chandra, Somanatham R, and Chaitanya Kumar U. "Design and Analysis of Drive System with Slip Ring Induction Motor for Electric Traction in India." International Journal of Power Electronics and Drive Systems (IJPEDS) 5, no. 3 (February 1, 2015): 374. http://dx.doi.org/10.11591/ijpeds.v5.i3.pp374-382.

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The use of Squirrel Cage for Traction has revolutionised the motive power of a Locomotive. The Asynchronous Motor is rugged with high starting Torque, has a very smooth Voltage and Speed control as compared to a DC Series Motor. When looking at the Traction perspective, a Slip Ring Induction Motor can be an alternative to the Squirrel Cage Motor as it has higher starting Torque and better efficiency than a Squirrel Cage Motor. the Slip Power Recovery scheme also plays a proactive role as ther can be substantial savings of energy in case of a Slip Ring Induction Motor. A detailed design and analysis of a Drive System with Slip Ring Induction Motor for Electric Traction is presented in this Research Paper

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36

Dobrucky, Branislav, Slavomir Kascak, Michal Frivaldsky, and Michal Prazenica. "Determination and Compensation of Non-Active Torques for Parallel HEV Using PMSM/IM Motor(s)." Energies 14, no. 10 (May 12, 2021): 2781. http://dx.doi.org/10.3390/en14102781.

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The paper deals with the determination and compensation of non-active torques of parallel HEV using an auxiliary electrical PMSM or IM motor. The non-active oscillating torque generating by the ICE engine was estimated, and consequently, the compensating torque component of the current was determined. Based on real measured data, the four regimes of operation have been investigated: compensating non-active torques, parallel operation, regenerating for PMSM, and both parallel operations, together with compensation. Using of p-q theory, the power of fundamental harmonic is presented by average values PAV, QAV of total power waveforms p(t), and q(t). Worked-out simulation results are used for sizing and dimensioning of PMSM machine, VSI inverter, and traction accumulator-battery. Circuit simulator Matlab/Simulink was used for all simulation experiments.

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37

Streit, Luboš, Jakub Talla, and Martin Janda. "Tram LC Filter Stabilization by Energy Storage System." TRANSACTIONS ON ELECTRICAL ENGINEERING 8, no. 1 (March 30, 2020): 8–12. http://dx.doi.org/10.14311/tee.2019.1.008.

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<span lang="EN-GB">The paper is focused on the tram input LC traction filter stabilization by the Energy Storage System. The input LC filter is almost undamped resonant circuit which is mainly excited by the motor constant torque command. The tram during voltage drops increases the current flow from the LC filter to hold constant torque and thereby further decreases the LC filter voltage, and vice versa. This could lead to unstable traction drive behaviour. The Energy Storage System can be used to stabilize LC filter voltage.</span>

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38

Mao, Qinghua, Maomao Lu, Xuhui Zhang, Min Zeng, Jianbo Zhao, and Shikun Li. "Study on new frequency conversion control system and power balance control method of dual-motor for shearer traction unit." Advances in Mechanical Engineering 14, no. 7 (July 2022): 168781322211045. http://dx.doi.org/10.1177/16878132221104586.

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The drive system of shearer traction unit is affected by complex load interference and system structure, which results in the problem of unbalanced power of dual-motor of shearer traction unit. A new type of dual-motor frequency conversion control system for shearer traction unit with “common rectification and dual inverters” is designed. And a dual-motor power balance control method based on particle swarm optimization torque cross-coupled control is proposed. The new frequency conversion control system adopts a parallel structure of two inverter circuits with a common DC bus. Particle swarm optimization is used to optimize the PID control parameters of torque cross-coupling control, which solves the problem that it is difficult to gain optimal PID parameters. The control model is established using Matlab/Simulink simulation software. The proposed control method and the master-slave control method are compared by simulation. The results show that the control effect of proposed control method is better synchromization and power balance effect than the master-slave control method. The proposed control method is applied to dual-motor control of shearer traction unit for experimental verification. The results indicate that the proposed power balance control method realizes that the output torque ratio of dual-motor is between 0.9 and 1.1.

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39

Kang, Sangmin, Maru Yoon, and Myoungho Sunwoo. "Traction control using a throttle valve based on sliding mode control and load torque estimation." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 219, no. 5 (May 1, 2005): 645–53. http://dx.doi.org/10.1243/095440705x11059.

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The purpose of an engine-controlled traction control system (TCS) is to regulate engine torque in order to keep the driven wheel slip in a desired range. Engine torque can be regulated by a throttle valve. In this paper, the engine-controlled TCS based on an engine model and estimated load torque by a Luenberger observer is proposed. For this control scheme, the engine model is required for a model-based controller design using sliding mode control. The engine torque controller determines the throttle angle for maintaining the desired manifold pressure to generate engine torque corresponding to the desired wheel torque. Since the load torque is composed of multiple external sources such as friction force, drag force, mechanical losses, and others, load torque estimation is required. The simulation results to various manoeuvres during slippery and split road conditions have showed better acceleration performance and stability of the vehicle with TCS. In addition, the load torque observer has estimated real load torque with little error.

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40

Fedotov, Ilya, and Vyacheslav Tikhonov. "Simulation of Traction Electric Drive with Vector Systems of Direct Torque Control." Environment. Technology. Resources. Proceedings of the International Scientific and Practical Conference 2 (August 8, 2015): 106. http://dx.doi.org/10.17770/etr2013vol2.846.

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The article deals with investigation of electromechanical and energetic characteristics of traction electric drive with vector systems of direct torque control. As a controlled object the traction asynchronous motor ДТА-1У1, which is used to drive the trolley-bus is considered. At the present time the usage of traction asynchronous electric drives for town transport is relevant. Due to development of power electronic devices and microprocessor-based control systems it became possible to replace DC electric drives with electric drives with asynchronous motors. The article contains brief description of two different types of control systems: field-oriented control (FOC) and direct torque control (DTC). Principles of work for both systems are considered and the main advantages and disadvantages associated with the use of these systems are pointed out. The models of both systems for traction asynchronous electric drive, built in modeling environment MATLAB/Simulink, are given in this article for further comparative analysis. As the main quality factor of control total harmonic distortion (THD) is used.

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41

Zhang, Y., X. Zhang, and W. Tobler. "A Systematic Model for the Analysis of Contact, Side Slip and Traction of Toroidal Drives." Journal of Mechanical Design 122, no. 4 (April 1, 1999): 523–28. http://dx.doi.org/10.1115/1.1290248.

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This paper presents a systematic model for the design and analysis of toroidal traction drive continuously variable transmissions (CVT). The contacts between the input disk, the roller and the output disk of the traction drive are formulated using the classical Hertzian contact theory. The traction force and side slip force occurring in CVT operation are modelled based on the elasto-hydrodynammic theory and are correlated to the traction drive geometric and kinematic parameters. The model allows for the quantitative analysis of traction drive operation under various torque inputs and over the desired ratio range. [S1050-0472(00)01004-7]

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42

Grenčík, Juraj, and Yoshihiro Suda. "Enhanced Curving Performance of Unsymmetric Suspension Trucks with Semiactive Control Concept Even under Acting Traction/Brake Torque." Journal of Robotics and Mechatronics 7, no. 4 (August 20, 1995): 324–28. http://dx.doi.org/10.20965/jrm.1995.p0324.

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In this paper, dynamic behavior of rail vehicles during curve negotiation when traction or brake torque is applied has been studied. Vehicles with conventional symmetric trucks are compared to those with the recently proposed trucks having longitudinally unsymmetric suspension characteristics. Computer simulations using full car body models considering non-linear characteristics of the contact force between wheel and rail are performed. Wheel lateral displacement and wheel attack angle are calculated to describe curving performance under different speed, curve radius, and vehicle load. Under the same curve conditions, wheel lateral displacement is considerably smaller and wheel attack angle is almost zero within wide range of torque, while growing from higher value in case of conventional truck design. Consequently, enhanced curving performance of new unsymmetric trucks even under acting traction/braking torque is proved.

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43

Belyaev, Alexander, Dmitry Afonichev, and Tatiana Trishina. "DISTRIBUTION OF TORQUES ON TRACTOR WHEELS." SCIENCE IN THE CENTRAL RUSSIA, no. 2 (April 29, 2022): 16–22. http://dx.doi.org/10.35887/2305-2538-2022-2-16-22.

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The regularities of the distribution of torques on axles and tractor wheels have been studied. An energy-saturated universal tractor of class 2 integrated circuit LTZ-155 with all driving and steered twin wheels of the same size with tires of size 9.5-42 was chosen as the object of research. The studies were carried out under the following layout options and driving conditions: 1) rectilinear movement of a separate tractor - idling; 2) execution of the technological process during operation of the machine-tractor unit in row spacing of row crops - cultivation; 3) rectilinear movement of a machinetractor unit with guns in the transport position - idling. It was found that the total values of torques on tractor wheels under relatively constant driving conditions for all experimental races with an increase in translational speed of movement slightly, by about 5... 18%, increase due to an increase in the frequency of the dynamic impact of the microprofile from the side of the bearing surface on the wheels and fluctuations in the traction load. At the same time, the mean square deviation of the wheel moments does not exceed 18... 25% of their average value, which is constant for a stationary ergodic process. With the considered variants of operation of the machine-tractor unit, the redistribution of torques, both on the axles and on the wheels of each axle, even if we assume that a constant total torque is supplied to the driving wheels, is very complex and dynamic, due to the inaccuracy of landings due to the tolerances of the coupling in the coupling device between the tractor and the cultivator from- due to the inability to comply with the alignment of the covered and encompassing connecting elements of the connecting triangles, this leads to an asymmetry of the normal weight load of the wheels from the mounted guns and the corresponding non-proportional distribution of traction forces on the wheels.

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44

ZHANG, Lipeng. "Torque Adaptive Traction Control for Distributed Drive Electric Vehicle." Journal of Mechanical Engineering 49, no. 14 (2013): 106. http://dx.doi.org/10.3901/jme.2013.14.106.

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Zhang, Zuoyan, and Manicka Dhanasekar. "Dynamics of railway wagons subjected to braking/traction torque." Vehicle System Dynamics 47, no. 3 (March 2009): 285–307. http://dx.doi.org/10.1080/00423110802008124.

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46

Park, Seungbum, and Myoungho Sunwoo. "Torque estimation of spark ignition engines via cylinder pressure measurement." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 217, no. 9 (September 1, 2003): 809–17. http://dx.doi.org/10.1177/095440700321700906.

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Indicated torque estimation and load torque observation algorithms are presented and appear to be a feasible alternative to the use of the engine torque maps in a modern torque-based engine management system. The proposed method, which uses a cylinder pressure sensor, has advantages of simplicity from the elimination of the requirement for a complex indicated torque model. Moreover, the proposed algorithms are accurate and robust to the variations in the environmental factors that affect the torque production procedure. The indicated torque is estimated from the peak pressure and its location, and the load torque is observed on the basis of the estimated indicated torque. The proposed torque estimation algorithms may provide new ideas for many application areas such as engine diagnostics, torque-based engine control, traction control via engine control, and vehicle dynamics control.

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47

Tretyakov, Evgeniy Alexandrovich, and Egor Gennadyevich Avdienko. "Determination of train parameters on route according to data from on-board measurement systems on freight electric locomotives." Transport of the Urals, no. 2 (2022): 97–102. http://dx.doi.org/10.20291/1815-9400-2022-2-97-102.

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The paper suggests an approach to determination of actual train operation parameters according to data from on-board measurement systems in order to increase efficiency of application of automatic electric motive power operation systems. The authors have analysed scientific works in the sphere of improvement of automatic electric locomotive operation. The paper also presents results of comparison of grade computations in KORTES and real data from on-board measurement systems on 2ES6 electric locomotives that operate on a section of the West-Siberian Railway. As a result, the authors have substantiated a possibility to apply data gained from on-board measurement systems in real-time mode for determination of such train parameters as tractive effort torque of traction motors, electric locomotive traction effort, external forces of train tractive resistance, reduced gross load hauled and etc. The approach to determination of train parameters according to data of current measurements allows increasing peculiarity of transmission of control actions and efficiency of an automatic train operation system.

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48

Ai, Xiaolan. "Development of Zero-Spin Planetary Traction Drive Transmission: Part 1 — Design and Principles of Performance Calculation." Journal of Tribology 124, no. 2 (July 24, 2001): 386–91. http://dx.doi.org/10.1115/1.1405130.

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A novel design of planetary tapered roller traction drive was described. The design eliminated the spin motion induced sliding, offering high mechanical efficiency and improved wear performance. Principles of performance calculation have been outlined. Torque and life calculations on a 186 kw (250 hp) prototype indicated a remarkable torque capacity and satisfactory durability.

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49

Young, Jieh Shian, Yu Bang Lin, Kuan Jie Chen, and Po Ting Chen. "Gain-Scheduled Control Approach by Logarithm Transformation for Electrical Vehicle Traction Force Control." Applied Mechanics and Materials 619 (August 2014): 283–87. http://dx.doi.org/10.4028/www.scientific.net/amm.619.283.

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This paper proposes an approach by logarithm to evaluating the electrical vehicle traction force control directly instead of the slip ratio measurements. Utilizing the built character database of the driven motor, or so-called current-RPM-torque database, a gain-scheduled approach by logarithm transformation is developed to provide the appropriate traction force while one traction wheel of the vehicle is traveling into different road surface. An illustrated simulation with a scenario close to real situation is also given to show the feasibility to evaluate and control the traction force through the database of the motor.

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Gundogdu, Tayfun, Zi-Qiang Zhu, and Ching Chuen Chan. "Comparative Study of Permanent Magnet, Conventional, and Advanced Induction Machines for Traction Applications." World Electric Vehicle Journal 13, no. 8 (July 28, 2022): 137. http://dx.doi.org/10.3390/wevj13080137.

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This paper investigates and compares the torque-generating capabilities and electromagnetic performance of advanced non-overlapping winding induction machines (AIM), conventional induction machines (CIM), and interior-permanent magnet (IPM) machines for electric vehicle (EV) applications. All investigated machines are designed based on the specifications of the Toyota Prius 2010 IPM machine. The steady-state and flux-weakening performance characteristics are calculated by employing the 2D finite element method and MatLab, and the obtained results are quantitatively compared. Furthermore, the torque-generating capabilities of three machines are investigated for different electric loadings, and the machine having the highest torque-generating capability is determined as AIM. Moreover, the major parameters affecting the torque-generating capability, such as magnetic saturation and magnet demagnetization, are examined in depth.

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Journal articles on the topic 'Traction torque'

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