Artykuły w czasopismach: „Polygonal voltage space vector structure”

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Raj R, Krishna, K. Gopakumar, Apurv Kumar Yadav, L. Umanand, Mariusz Malinowski i Wojciech Jarzyna. "A Twelve Concentric Multilevel Twenty-Four Sided Polygonal Voltage Space Vector Structure for Variable Speed Drives". IEEE Transactions on Power Electronics 34, nr 10 (październik 2019): 9906–15. http://dx.doi.org/10.1109/tpel.2019.2892329.

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Krishna, Raj R., K. Gopakumar, Mathews Boby, Apurv Kumar Yadav, Leopoldo Garcia Franquelo i Sheldon S. Williamson. "Multilevel 24-Sided Polygonal Voltage-Space-Vector Structure Generation for an IM Drive Using a Single DC Source". IEEE Transactions on Industrial Electronics 66, nr 2 (luty 2019): 1023–31. http://dx.doi.org/10.1109/tie.2018.2831189.

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Lakshminarayanan, Sanjay, R. S. Kanchan, P. N. Tekwani i K. Gopakumar. "Multilevel inverter with 12-sided polygonal voltage space vector locations for induction motor drive". IEE Proceedings - Electric Power Applications 153, nr 3 (2006): 411. http://dx.doi.org/10.1049/ip-epa:20050444.

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Lakshminarayanan, S., G. Mondal, K. Gopakumar, N. S. Dinesh i S. Figarado. "Eighteen-sided polygonal voltage space-vector-based PWM control for an induction motor drive". IET Electric Power Applications 2, nr 1 (1.01.2008): 56–63. http://dx.doi.org/10.1049/iet-epa:20070269.

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Lakshminarayanan, S., G. Mondal, P. N. Tekwani, K. K. Mohapatra i K. Gopakumar. "Twelve-Sided Polygonal Voltage Space Vector Based Multilevel Inverter for an Induction Motor Drive With Common-Mode Voltage Elimination". IEEE Transactions on Industrial Electronics 54, nr 5 (październik 2007): 2761–68. http://dx.doi.org/10.1109/tie.2007.899929.

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Surendra Babu, N. N. V., i B. G. Fernandes. "Cascaded two-level inverter-based multilevel static VAr compensator using 12-sided polygonal voltage space vector modulation". IET Power Electronics 5, nr 8 (2012): 1500. http://dx.doi.org/10.1049/iet-pel.2012.0120.

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Kumar Akkarapaka, Ananda, i Dheerendra Sing. "Digital Implementation of DSVPWM Control for EV fed through Impedance Source Inverter". International Journal of Power Electronics and Drive Systems (IJPEDS) 6, nr 3 (1.09.2015): 477. http://dx.doi.org/10.11591/ijpeds.v6.i3.pp477-485.

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In this paper, a new space vector modulation technique is proposed for speedcontrol of Induction Motor using Z-source inverter powered by a low voltage DCsource. The zero states of conventional space vector modulation is used for boosting the DC link voltage to the required level. The proposed SVM techniqueestimates the required shoot through period of the Z-source inverter to maintainthe DClink voltage constant at the desired level through capacitor voltage control.A 32 bit DSP (TMS320F28335) is used to implement the proposed space vectormodulation method. The power structure and the modulation technique is wellsuited for electric vehicle application.

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Imthias, Mohammed, Krishna Raj R., Apurv Kumar Yadav, K. Gopakumar, L. Umanand i Carlo Cecati. "Minimization of Switched Capacitor Voltage Ripple in a Multilevel Dodecagonal Voltage Space Vector Structure for Drives". IEEE Transactions on Industrial Electronics 67, nr 1 (styczeń 2020): 126–35. http://dx.doi.org/10.1109/tie.2019.2893825.

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Abdul Azeez, Najath, Anubrata Dey, K. Mathew, Jaison Mathew i K. Gopakumar. "A Nearly Constant Switching Frequency Current Error Space Vector Based Hysteresis Controller for an IM Drive with 12-Sided Polygonal Voltage Space Vectors". EPE Journal 23, nr 4 (grudzień 2013): 33–41. http://dx.doi.org/10.1080/09398368.2013.11463865.

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Kuo-Kai Shyu i Hsin-Jang Shieh. "Variable structure current control for induction motor drives by space voltage vector PWM". IEEE Transactions on Industrial Electronics 42, nr 6 (1995): 572–78. http://dx.doi.org/10.1109/41.475497.

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Das, A., K. Sivakumar, R. Ramchand, C. Patel i K. Gopakumar. "A Combination of Hexagonal and 12-Sided Polygonal Voltage Space Vector PWM Control for IM Drives Using Cascaded Two-Level Inverters". IEEE Transactions on Industrial Electronics 56, nr 5 (maj 2009): 1657–64. http://dx.doi.org/10.1109/tie.2009.2013751.

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Zhang, Guangyu. "Development Status of Space Vector Pulse Width Modulation (SVPWM) Control Method for Multi-Level Inverter". Journal of Physics: Conference Series 2479, nr 1 (1.04.2023): 012053. http://dx.doi.org/10.1088/1742-6596/2479/1/012053.

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Abstract Inverter has played an important role in power electronics technology since its invention. The traditional 2-level inverter is most widely used due to its simple structure, but it cannot meet the needs of high-voltage and high-power fields anymore. Thus, three-level and multi-level inverters are invented. Although complicated in structure, these two kinds of inverters can output larger voltage, and the voltage distortion rate and the ripple current are smaller. The emergence of different modulation methods also makes up for the defects of multi-level inverters. The improvement and simplification of the control algorithm of space vector pulse width modulation (SVPWM) make multi-level control less complicated. This paper introduces the current status and trends of SVPWM.

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Iwаszkiewicz, Jаn, i Adam Muc. "The active filtering of the inverter output voltage by use of orthogonal vectors’ control strategy". Renewable Energy and Power Quality Journal 20 (wrzesień 2022): 817–21. http://dx.doi.org/10.24084/repqj20.446.

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he paper proposes a creative control method permitting to filter output voltage waveforms of the inverter. The main idea is based on the assumption that the total inverter output space vector is carefully chosen as a composition of two space vectors generated by 2 two-level inverters. The total built-up inverter is assembled of two standard three-phase inverters: a main inverter (MI) and an auxiliary one (AI) serving as an active filter. The output voltage space vector of the built-up inverter is composed of one or two space vectors generated by the respective inverters. The space vectors of the auxiliary inverter are orthogonal to the respective space vectors of the main inverter. The structure and its performance as well as the control method using specified vectors are discussed in the paper.

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Kumar, B. Hemanth, K. Janardhan, R. Seshu Kumar, J. Ramesh Rahul, Arvind R. Singh, Raj Naidoo i Ramesh C. Bansal. "An Enhanced Space Vector PWM Strategies for Three Phase Asymmetric Multilevel Inverter". International Transactions on Electrical Energy Systems 2023 (20.02.2023): 1–21. http://dx.doi.org/10.1155/2023/5548828.

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This work presents the two space vector pulse width modulation (SVPWM-I and SVPWM-II) strategies for eleven-level (11L) asymmetric cascaded H-bridge (CHB) multilevel inverter (MLI). Depending on the isolated structure and nonappearance of capacitor voltage balancing issues, the CHB MLI structure is favoured. These days, the SVPWM control method is accomplished superior consideration among the diverse PWM methods. In common, the SVPWM strategy is realized based on deteriorating higher-level hexagons into a lower level hexagon (2-level). Compared to the classical SVPWM strategy, the proposed SVPWM-I strategy decreases the memory and mathematical burden necessity included within the demonstration of eleven-level SVPWM devoid of losing the inverter output voltage (AC) contour by diminution the number of two-level hexagons. Also, the SVPWM-II strategy is presented, which incredibly diminishes the mathematical endeavours. The presented two SVPWM methods performed on an eleven-level asymmetric CHB multilevel inverter (MLI) by utilizing SIMULINK/MATLAB program tool and are compared with conventional sinusoidal PWM and Third harmonic injection (THI) PWM methods to confirm the proposed SVPWM methods. The proposed SVPWM methods give higher AC RMS voltage and lower harmonic distortion when compared to SPWM and THIPWM methods. To validate the presented two SVPWM control schemes, hardware results are taken on asymmetric eleven-level CHB MLI.

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Yadav, Apurv Kumar, Mathews Boby, Sumit Kumar Pramanick, K. Gopakumar, Loganathan Umanand i Leopoldo G. Franquelo. "Generation of High-Resolution 12-Sided Voltage Space Vector Structure Using Low-Voltage Stacked and Cascaded Basic Inverter Cells". IEEE Transactions on Power Electronics 33, nr 9 (wrzesień 2018): 7349–58. http://dx.doi.org/10.1109/tpel.2017.2764541.

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Ragab, Dana, i Jasim Ghaeb. "Implementation of reactive compensator for voltage balancing using AI based models and novel performance index". International Journal of Power Electronics and Drive Systems (IJPEDS) 13, nr 1 (1.03.2022): 594. http://dx.doi.org/10.11591/ijpeds.v13.i1.pp594-605.

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Voltage-unbalance is one of the power quality deficiencies that degrades electrical power systems performance. In this work, voltage unbalance problem is tackled through two stages; evaluation using a novel performance index and mitigation using a thyristor-controlled reactor (TCR) compensator with artificial intelligent (AI) based models. Unlike standard performance indices that rely on voltages' root mean square (RMS) values, the proposed index depends on the space vector (SV) signal amplitude for voltage unbalance evaluation. This signal depends on the instantaneous values of the three-phase voltages and has twice the system frequency. Therefore, the proposed index entitled as space vector unbalance factor (SVUF) reflects the amount of voltage unbalance and reduces the time necessary for evaluation by half. Subsequently, advanced models based on several algorithms are proposed to generate the required firing angles for TCR compensator to restore voltage balance, including radial basis functions networks (RBFNs), hybrid-RBFNs (H-RBFNs), polynomials (PNs), and simplified neural networks (NNs). Models' structure, prediction capability, and response time are analyzed. Results show that the time required for voltage unbalance mitigation is reduced. Moreover, the models used to generate the firing angles are simplified significantly while maintaining high accuracy.

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Zhang, Yong, Hua Deng i Yi Zhang. "Synchronization Control of Space Voltage Vector Controlled Multi-PMSM Based on Adjacent Cross-Coupling". Advanced Materials Research 383-390 (listopad 2011): 6931–37. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.6931.

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In this paper permanent magnet synchronous motor (PMSM) which is a multi-variable, nonlinear and high coupling system has a good performance adopting the strategy of field-oriented control (FOC) and space vector PWM (SVPWM). Furthermore, multi-PMSM synchronous driving system is established on employing adjacent cross-coupling strategy (ACC). In addition, a variable structure control with an integral sliding surface and exponential reaching law is designed for speed controller. Comparing with traditional PI controlled multi-PMSM system the results illustrate the effectiveness of the proposed control.

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Cheng, Hong, Daokuan Yang, Cong Wang i Changgeng Tian. "An SVPWM Algorithm for a Novel Multilevel Rectifier with DC-Side Capacitor Voltage Balance". Electronics 12, nr 7 (30.03.2023): 1637. http://dx.doi.org/10.3390/electronics12071637.

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The recently proposed novel unidirectional multilevel rectifier, a three single-phase star-connected multilevel rectifier, has the characteristic of having a large number of DC-side capacitors and a complex capacitor voltage balancing control structure under conventional carrier-based phase-shift sine wave pulse-width modulation (SPWM). Hence, a space vector pulse-width modulation (SVPWM) algorithm for the novel multilevel rectifier is proposed in this paper, which can quickly balance the capacitor voltage without an additional voltage balancing control structure. Firstly, it divides the space vectors of the rectifier, then it determines the two basis voltage vectors that synthesize the output reference voltage. After that, based on the analysis of the relationship between switching states and the charge–discharge of capacitors, the final action sequences of redundant vectors are determined according to the principle of keeping the capacitor charge–discharge time consistent. Thus, the capacitor voltages can be automatically balanced without an additional voltage balancing control structure. Finally, simulation and experimental results validated the feasibility and effectiveness of the proposed SVPWM algorithm. The results also show improvements in current quality, capacitor voltage balance and the fluctuation of the neutral point voltage on the DC-link, allowing for further reduction in the overall volume and cost of the rectifier.

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Yuan, Zhan Jun, i Jin Wang. "Design of New Frequency Converter Based on TMS320LF2407A". Advanced Materials Research 466-467 (luty 2012): 809–13. http://dx.doi.org/10.4028/www.scientific.net/amr.466-467.809.

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In order to improve voltage utilization ratio and dynamic performance of frequency converter, this paper presents a digital frequency converter design scheme based on digital signal processor TMS320LF2407A and the theory of space vector pulse width modulation (SVPWM) technology, provides its detailed design measures of software and hardware and SVPWM algorithm realization methods. The experimental results prove that this new frequency converter has simple structure, high control precision, higher voltage utilization ratio, better dynamic and static property.

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Lin, Whei-Min, i Chien-Hsien Wu. "Fast Support Vector Machine for Power Quality Disturbance Classification". Applied Sciences 12, nr 22 (16.11.2022): 11649. http://dx.doi.org/10.3390/app122211649.

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The power quality disturbance (PQD) problem involves problems of voltage swell, voltage sag, power interruption, harmonics and complex events involving multiple PQD problems. The PQD problem attracted considerable attention from utilities, especially when renewable energy is getting a higher penetration. The PQD problem could downgrade the service quality, causing problems of malfunctions and instabilities. This paper proposed a simplified SVM technique to identify the PQD problem including the multiple PQD classification. With the simple structure proposed, the methodology could reduce a great deal of training data; requires much less memory space and saves computing time. An IEEE 14-bus power system was used to show the performance. Many tests were conducted, and the method was compared with an artificial neural network (ANN). Simulation results showed the shortened processing time and the effectiveness of the proposed approach.

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Hu, Wang, Yunxiang Xie, Zhiping Wang i Zhi Zhang. "A Novel Three-Phase Current Source Rectifier Based on an Asymmetrical Structure to Reduce Stress on Semiconductor Devices". Energies 13, nr 13 (30.06.2020): 3331. http://dx.doi.org/10.3390/en13133331.

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This paper presents a novel three-phase current source rectifier (CSR) for AC/DC step-down voltage conversion to reduce voltage and current stress. The proposed converter features an asymmetrical connection between upper and lower arms compared with conventional CSRs, but has the same number of devices. With the proposed asymmetrical structure and modified space vector pulse width modulation (SVPWM) scheme, half of transistors only need to withstand half of the line-to-line voltage rather than the full line-to-line voltage, and its DC link current can be shared by multiple switches in freewheeling periods. Therefore, it is able to bring about a significant reduction in voltage and current stress, allowing for an improvement in the converter without additional cost. The topological structure, operation principles, and comparative analysis are specifically presented. Finally, an experimental prototype is built up to verify the performance of the proposed converter.

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Li, Yan, i Gang Li. "A Low-Cost Hybrid Active Power Filter for High Voltage System". Applied Mechanics and Materials 241-244 (grudzień 2012): 767–72. http://dx.doi.org/10.4028/www.scientific.net/amm.241-244.767.

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A novel low-cost shunt hybrid active power filter for power quality in high voltage system is proposed in the paper. The active power filter is based on three-phase four-switch structure. An inductor is parallel in the second-side of the transform, instead of connected in the first-side of transform. An improved SVPWM is proposed according to the APF structure. A novel coordinate matrix is proposed to transform three-phase circumrotating coordinate into two-phase static coordinate. The zero vector is composed of two space voltage vectors with same breadth and contrary direction at same working time in a switch period. Simulation results confirm the validity of the proposed structure and the improved SVPWM.

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Rząsa, Janina. "An Alternative Carrier-Based Implementation of Space Vector Modulation to Eliminate Common Mode Voltage in a Multilevel Matrix Converter". Electronics 8, nr 2 (6.02.2019): 190. http://dx.doi.org/10.3390/electronics8020190.

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The main aim of the paper is to find a control method for a multilevel matrix converter (MMC) that enables the elimination of common mode voltage (CMV). The method discussed in the paper is based on a selection of converter configurations and the instantaneous output voltages of MMC represented by rotating space vectors. The choice of appropriate configurations is realized by the use of space vector modulation (SVM), with the application of Venturini modulation functions. A multilevel matrix converter, which utilizes a multilevel structure in a traditional matrix converter (MC), can achieve an improved output voltage waveform quality, compared with the output voltage of MC. The carrier-based implementation of SVM is presented in this paper. The carrier-based implementation of SVM avoids any trigonometric and division operations, which could be required in a general space vector approach to the SVM method. With use of the proposed control method, a part of the high-frequency output voltage distortion components is eliminated. The application of the presented modulation method eliminates the CMV in MMC what is presented in the paper. Additionally, the possibility to control the phase shift between the appropriate input and output phase voltages is obtained by the presented control strategy. The results of the simulation and experiment confirm the utility of the proposed modulation method.

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Boby, Mathews, Sumit Pramanick, R. Sudharshan Kaarthik, S. Arun Rahul, K. Gopakumar i L. Umanand. "Multilevel Dodecagonal Voltage Space Vector Structure Generation for Open-End Winding IM Using a Single DC Source". IEEE Transactions on Industrial Electronics 63, nr 5 (maj 2016): 2757–65. http://dx.doi.org/10.1109/tie.2015.2511162.

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Liu, Bin, Yue Zhao i Hui-Zhong Hu. "Structure-variable sliding mode control of interior permanent magnet synchronous motor in electric vehicles with improved flux-weakening method". Advances in Mechanical Engineering 10, nr 1 (styczeń 2018): 168781401770435. http://dx.doi.org/10.1177/1687814017704355.

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A kind of flux-weakening control method based on speed loop structure-variable sliding mode controller is proposed for interior permanent magnet synchronous motor in electric vehicles. The method combines maximum torque per ampere with vector control strategy to control electric vehicle’s interior permanent magnet synchronous motor. During the flux-weakening control phase, the anti-windup integral controller is introduced into the current loop to prevent the current regulator from entering the saturated state. At the same time, in order to further improve the utilization rate of the direct current bus voltage and expand the flux-weakening regulating range, a space vector pulse-width modulation over-modulation unit is employed to contravariant the direct current bus voltage. Comparing with the conventional proportional–integral controller, the proposed sliding mode control algorithm shows that it has more reliable control performance. In addition, more prominent flux-weakening performance of the proposed flux-weakening method is illustrated by numerical simulation comparison.

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Li, Hua, Ji Hong Zhang, Zhen Kui Wu i Han Shan Li. "Application of SVPWM Convertor in the Distributed Wind Power System". Applied Mechanics and Materials 441 (grudzień 2013): 223–26. http://dx.doi.org/10.4028/www.scientific.net/amm.441.223.

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The capacity of good input/output characteristics and energy bi-directional flow was required for excitation power in distributed wind power system. This paper analyzed the basic principle of voltage and current double closed loop control strategy, and expounded voltage space vector pulse width modulation (SVPWM) technology based on the topological structure of three-phase voltage convertor. It also established the SVPWM algorithm and the convertor model in the Matlab/Simulink, and conducted the simulation research for the distributed wind excitation power supply with this algorithm. The theory analysis and simulation results indicated that this SVPWM convertor is feasibility and superiority in this field.

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Tang, Xiao, Zhi Zhang, Xueliang Liu, Chang Liu, Ming Jiang i Yue Song. "A Novel Field-Oriented Control Algorithm for Permanent Magnet Synchronous Motors in 60° Coordinate Systems". Actuators 12, nr 2 (18.02.2023): 92. http://dx.doi.org/10.3390/act12020092.

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In this study, a novel field-oriented control (FOC) algorithm was proposed in a 60° coordinate system for controlling the speed of permanent magnet synchronous motors. The FOC algorithm consists of several parts in which the reference currents and feedback currents are transformed into the representation form in a 60° coordinate system. Current regulators are typically used in a 60° coordinate system to directly obtain the reference voltage vector. The proposed FOC structure was established by incorporating the space vector pulse width modulation algorithm in a 60° coordinate system. The proposed FOC structure simplified the FOC algorithm and reduced its computational burden. The feasibility of the proposed method was verified through simulations and experiments.

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Nguyen, Phu Cong, Quoc Dung Phan i Dinh Tuyen Nguyen. "A New Decentralized Space Vector PWM Method for Multilevel Single-Phase Full Bridge Converters". Energies 15, nr 3 (29.01.2022): 1010. http://dx.doi.org/10.3390/en15031010.

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This paper proposes a decentralized control structure and method for a multilevel single-phase power converter using space vector pulse width modulation (SVPWM). The focus of this paper is on the decentralized control structure for the power converter cells that will exchange information with neighboring cells in order to adjust the switching vector and switching time for each cell. In this study, the switching vectors and the corresponding switching times of each cell will be self-determined based on the phase angle of two neighboring cells. Normally, SVPWM applied to the multilevel power converters need complete information about the total cells and cell’s position to build a control algorithm. Meanwhile, a decentralized space vector pulse width modulation (DSVPWM) method is proposed that can be applied to power converters with any number of cells and can be considered as a multilevel SVPWM method. In addition, the decentralized multilevel single-phase power converter has high flexibility with which it is possible to easily adjust the number of active cells, so that the output voltage can be adjusted quickly; this provides the ability to dynamically reconfigure without interrupting the power energy supply process. The proposed control structure and method are effectively verified based on simulation and experimental results. Experimental results are evaluated based on a 9-level single-phase power converter, which has an RL load with rated parameters 220 V/500 W.

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Zhou, Xue Song, Xiao Li Kong i You Jie Ma. "V2G Technology for Electric Vehicles". Applied Mechanics and Materials 641-642 (wrzesień 2014): 1256–59. http://dx.doi.org/10.4028/www.scientific.net/amm.641-642.1256.

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V2G technology is an important part of the smart grid,which realizes the power inter-transformation between Power Grid and electric vehicles [1]. V2G technology is introduced and the structure of charging and discharging system in V2G technology is analyzed [2]. Under synchronous rotating frame, the combination current-controlled and Voltage space vector control method is adopted, which carries out the power inter-transformation between Power Grid and electric vehicles [3].

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Salam Al-Khayyat, Ali, Amean Al-Safi i Mustafa Jameel Hameed. "Single-phase grid-connected power control in dq synchronous reference frame with space vector modulation using FPGA". Indonesian Journal of Electrical Engineering and Computer Science 30, nr 1 (1.04.2023): 57. http://dx.doi.org/10.11591/ijeecs.v30.i1.pp57-69.

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This paper presents the performance of controlling the active and reactive power of single-phase grid connected inverter by dq synchronous reference frame and space vector modulation (SVM) which is implemented by using field programmable gate array (FPGA) due to the flexibility they offer in comparison to other digital signal processors, hence it become the standard instruments for implementing various types of pulse width modulation (PWM) digital signal processors (DSPs). The SVM method has used because of its superiority in terms of harmonic distortion, switching losses and utilization of direct current (DC) bus. The synchronization is achieved by using second order generalized integrator (SOGI) due to its simple structure, certain filtering ability and frequency adaptability, in which the phase locked loop (PLL) ensures high performance for single-phase inverter. The active and reactive inverter current has been controlled and decoupled from each other and the dynamic response has been improved and became fast with proper feed-forward and decoupling grid voltage term. The system has simulated by MATLAB and the result shows robust control of injected grid current, active and reactive power control and DC link voltage control.

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Xiong, Xiong, Yu Xin Sun, Huang Qiu Zhu i Xian Xing Liu. "Research on Drive and Control System of Bearingless Brushless DC Motor for Satellite Flywheel". Applied Mechanics and Materials 703 (grudzień 2014): 339–42. http://dx.doi.org/10.4028/www.scientific.net/amm.703.339.

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Compared with the complex structure and unsatisfactory performance of traditional flywheel drive system, the proposed strategy adopts bearingless brushless DC motor as the drive actuator of flywheel. The direct torque control which combines the space voltage vector pulse width modulation is presented to control the system. Moreover, a simulation system is built with Matlab/Simulink toolbox. From the simulation results, the proposed control strategy is verified and the rotor can be stably suspended by suspension force along the central axis.

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Tran, Vinh-Thanh, Duc-Tri Do, Van-Dung Do i Minh-Khai Nguyen. "A Three-Level DC-Link Quasi-Switch Boost T-Type Inverter with Voltage Stress Reduction". Energies 13, nr 14 (20.07.2020): 3727. http://dx.doi.org/10.3390/en13143727.

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In recent years, the three-level T-Type inverter has been considered the best choice for many low and medium power applications. Nevertheless, this topology is known as a buck converter. Therefore, in this paper, a new topology incorporating the dc-link type quasi-switched boost network with the traditional three-level T-type inverter is proposed to overcome the limit of traditional three-level T-Type inverter. The space vector pulse width modulation scheme is considered to control this topology, which provides some benefits such as enhancing modulation index and reducing the magnitude of common-mode voltage. For this scheme, the zero, medium, and large vectors are utilized to generate the output voltage. The shoot-through state which is adopted by turning on all power switches of inverter leg is inserted into zero vector to boost the dc-link voltage. As a result, there is no distortion at the output waveform. The control signal of intermediate network power switches is also detailed to improve the boost factor and voltage gain. As a result, the voltage stress on power devices like capacitors, diodes, and switches is decreased significantly. To demonstrate the outstanding of proposed structure and its control strategy, some comparisons between the proposed method and other ones are performed. Simulation and experimental prototype results are conducted to verify the accuracy of the theory and effectiveness of the inverter.

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Akkarapaka, Ananda Kumar, i Dheerendra Singh. "An IFOC-DSVPWM Based DC-Link Voltage Compensation of Z-Source Inverter Fed Induction Motor Drive for EVs". Advances in Power Electronics 2015 (13.08.2015): 1–14. http://dx.doi.org/10.1155/2015/185381.

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The drop in DC-link voltage of adjustable speed drives (ASD) occurs mainly due to the increase in output power demands. This may lead to inefficient operation and eventually the tripping of the drive. This paper presents a Double Space Vector Pulse Width Modulation (DSVPWM) technique for boosting and compensating the DC-link voltage of Z-source inverter (ZSI). The DSVPWM technique estimates the required shoot through period of the Z-source inverter to maintain the DC-link voltage constant at the desired level through capacitor voltage control. The DSVPWM can obtain maximum boost at any given modulation index in comparison to simple boost control (SBC) method. It also utilizes the dead time more effectively. The speed control of the ZSI fed induction motor drive is done by employing indirect field-oriented (IFO) control method. A 32-bit DSP (TMS320F28335) is used to implement the IFOC-DSVPWM method for ZSI. The power structure and the modulation technique are well suited for electric vehicle application.

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Jun, Rong. "The Simulation Study of Direct-Current Control Technology for Three-Phase Voltage Type Rectifier". Applied Mechanics and Materials 556-562 (maj 2014): 2105–9. http://dx.doi.org/10.4028/www.scientific.net/amm.556-562.2105.

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The diode uncontrolled rectifier or the phase controlled rectifier is widely used in conventional rectifier link, thus the conventional rectifier link on the grid inject a large number of harmonics and reactive power, and they cause a severe grid “pollution”. This paper starts from the basic principles of the PWM rectifier, then the paper discusses the topological classification of three-phase PWM rectifier in detail. Based on topological structure, the paper builds the mathematical model of three-phase stationary coordinate system and two-phase rotating coordinate system. Based on space voltage vector, the paper studies PWM control method in-depth and simulates in Matlab/Simulink. The correctness of the theoretical study of three-phase voltage source PWM rectifier system is verified by the simulation results.

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Hao, Ke Peng, i Hong Mei Li. "Open-Circuit Fault Diagnosis and Fault-Tolerant Control of IPMSM System". Applied Mechanics and Materials 416-417 (wrzesień 2013): 658–69. http://dx.doi.org/10.4028/www.scientific.net/amm.416-417.658.

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The integrated mathematical model of an interior permanent magnet synchronous machine (IPMSM) system is set up suitable for healthy state, open-circuit fault state and fault-tolerant state in this paper. An on-line open-circuit fault diagnosis method is proposed, the fault-tolerant structure is set to connect the fault phase to the middle of DC link, considering that DC link voltage is not balanced, therefore, an optimized adaptive space vector pulse width SVPWM of four-switch three-phase inverters (FSTPI) under DC-link voltage ripple condition is presented to achieve the maximum torque per ampere (MTPA) control and flux weakening control of the IPMSM system under the fault-tolerant state. Based on the abovementioned research, system simulations are implemented and simulation results are given.

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36

R, Rakesh, Krishna Raj Ramachandran, Apurv Kumar Yadav, K. Gopakumar, Loganathan Umanand i Kouki Matsuse. "A Switched Capacitive Filter-Based Harmonic Elimination Technique by Generating a 30-Sided Voltage Space Vector Structure for IM Drive". IEEE Transactions on Power Electronics 35, nr 3 (marzec 2020): 2402–10. http://dx.doi.org/10.1109/tpel.2019.2930280.

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Thanh Ha, Vo, Pham Thi Giang i Phuong Vu. "Multilevel inverter application for railway traction motor control". Bulletin of Electrical Engineering and Informatics 11, nr 4 (1.08.2022): 1855–66. http://dx.doi.org/10.11591/eei.v11i4.3964.

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This paper will present why choosing a 7-level reverse voltage source fed to three-phase induction motors to the railway traction motor. In addition, this paper shows the implementation of space vector pulse width modulation (SVPWM) and the math model of induction motor, stator currents, and speed controller design of electric traction drive system based on field-oriented control (FOC). By MATLAB/Simulink method, this multi-level inverter in FOC structure reduces total harmonic distortion (THD) more than other multi-level inverters such as 3 and 5-level inverter. Furthermore, this FOC control structure combined with 7-level inverter improved speed and torque responses required for railway traction motor load.

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38

Abu-Rub, H., D. Stando i M. P. Kazmierkowski. "Simple speed sensorless DTC-SVM scheme for induction motor drives". Bulletin of the Polish Academy of Sciences: Technical Sciences 61, nr 2 (1.06.2013): 301–7. http://dx.doi.org/10.2478/bpasts-2013-0028.

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Abstract The paper focuses on the development of a novel DSP based high performance speed sensorless control scheme for PWM voltage source inverter fed induction motor drives. Firstly, two generic torque and flux control methods the Field Oriented Control (FOC) and Direct Torque Control (DTC), are briefly described. For implementation the sensorless scheme DTC with Space Vector Modulation (DTCSVM) has been selected because it eliminates the disadvantages associated with the DTC while keeping the advantages of both FOC and DTC. Secondly, the simple flux vector observer allowing speed sensor elimination is given. The novelty of the presented system lays in combining the DTC-SVM structure with a simple observer for both torque/flux and speed sensorless control. Furthermore, the DTC-SVM structure which operates in speed sensorless and torque control mode is presented. Finally, the description of a 50 kW laboratory drive and experimental results illustrating properties of the system are given.

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39

Li, Song. "Simulation Study of SVPWM Control Technology for NPC Inverter". Applied Mechanics and Materials 347-350 (sierpień 2013): 392–95. http://dx.doi.org/10.4028/www.scientific.net/amm.347-350.392.

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With the development of high voltage technology ,the inverter power is becoming higher and higher . The traditional two-level inverter capacity has been difficult to achieve high power requirements due to the limitation of the power electronic devices. Therefore, different new kinds of multilevel inverter topologies with high-performance are proposed by the scientist all over the world. This paper introduces the topology structure, characteristics and working principle of threelevel inverter, and makes a detailed description of space vector pulse width modulation principle. Finally, the simulation waveforms are presented with Matlab/Simulink, the results verifies the validity of the theoretical analysis.

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40

Teekaraman, Yuvaraja, Ramya Kuppusamy i Srete Nikolovski. "Solution for Voltage and Frequency Regulation in Standalone Microgrid using Hybrid Multiobjective Symbiotic Organism Search Algorithm". Energies 12, nr 14 (22.07.2019): 2812. http://dx.doi.org/10.3390/en12142812.

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Voltage and frequency regulation is one of the greatest challenges for proper operation subsequent to the isolated microgrid. To validate the satisfactory electric power quality supply to customers, the proposed manuscript tries to enhance the quality of energy provided by DG (Distributed generation) units connected to the subsequent isolated grid. Microgrid and simulation-based control structure including voltage and current control feedback loops is proposed for microgrid inverters to recover voltage and frequency of the system subsequently for any fluctuations in load change. The proportional-integral (PI) controller connected to the voltage controller is an end goal to obtain smooth response in most of the consistent frameworks. The present controller creates the space vector pulse width modulation signals which are given to the three-leg inverter. The objective elements of the multiobjective optimization issue are voltage overshoot and undershoot, rise time, settling time, and integral time absolute error (ITAE). The hybrid Multiobjective Symbiotic Organism Search (MOSOS) calculation is associated for self-tuning of control parameters keeping in mind the end goal to deal with the voltage and frequency. The proposed PI controller, along with the hybrid Multiobjective Symbiotic Organism Search algorithm, provides the solution for the greatest challenge of voltage and frequency regulation in an isolated-microgrid operation.

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Rao, S. Nagaraja, D. V. Ashok Kumar i Ch Sai Babu. "Implementation of Cascaded based Reversing Voltage Multilevel Inverter using Multi Carrier Modulation Strategies". International Journal of Power Electronics and Drive Systems (IJPEDS) 9, nr 1 (1.03.2018): 220. http://dx.doi.org/10.11591/ijpeds.v9.i1.pp220-230.

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In this paper, a cascaded based reversing voltage (CBRV) multilevel inverter structure is proposed inorder to compensate the major drawbacks in the conventional multilevel inverters. The proposed topology requires less number of components, less carrier signals and gate drives when compared to existing multilevel inverters particularly at higher levels. Therefore, the complexity and overall cost are greatly reduced particularly for higher output voltage levels. This paper also presents the most relevant control and modulation methods by a triangular based multi carrier pulse width modulation (PWM) scheme for the proposed CBRV inverter topology. This paper presents a comparison between different modulation strategies for CBRV inverter topology based on sinusoidal and space vector references with multi triangular carrier waves. The work strive hard to present the scrutiny that has been made between various PWM control techniques for 1–Ф seven level CBRV inverter structure. The comparison is made in terms of Total Harmonic Distortion (THD) and fundamental RMS voltage. Finally, the simulation results are included to verify the effectiveness of the proposed CBRV inverter topology and validate the proposed theory. A hardware set up was developed for a 1–Ф seven level CBRV inverter topology using FPGA based pulse generation.

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Ha, V. T., P. T. Giang i V. H. Phuong. "T-Type Multi-Inverter Application for Traction Motor Control". Engineering, Technology & Applied Science Research 12, nr 2 (9.04.2022): 8321–27. http://dx.doi.org/10.48084/etasr.4776.

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The structure and principle of the T-type 3-level reverse voltage source that will be fed to three-phase induction motors will be presented in this study. The implementation of Space Vector Pulse Width Modulation (SVPWM) and the math models of the induction motor, the stator currents, and the speed controller design of the electric traction drive system based on Field-Oriented Control (FOC) will be also shown. This three-level T-type inverter in the FOC structure decreases Total Harmonic Distortion (THD) more than the previous two-level inverters. By combining the FOC control structure with the T-type 3-level inverter, the speed and torque responses necessary for railway traction motor load were improved. Finally, Matlab/Simulink will be used to demonstrate the correctness of the T-Type multi-level inverter theory.

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43

Zheng, Changming, Jiafeng Yang, Zheng Gong, Ziyu Xiao i Xuanxuan Dong. "Cascade-Free Modulated Predictive Direct Speed Control of PMSM Drives". Energies 15, nr 19 (30.09.2022): 7200. http://dx.doi.org/10.3390/en15197200.

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Conventional predictive control for permanent magnet synchronous motors (PMSMs) contains dual speed and current loops, and has a complex structure and multiple parameters to be tuned. Conventional predictive direct speed control (PDSC) exhibits an unsatisfactory steady-state performance. To tackle these issues, this paper presents a cascade-free modulated PDSC (MPDSC) scheme for PMSM drives. First, a speed predictive model is built, where a second-order sliding mode observer is employed to quickly and robustly estimate the load torque. Then, a dual objective cost function with speed and stator current tracking is designed, which improves the system’s steady-state performance. Furthermore, the analytical solution of the constrained optimal voltage vector is derived and it is synthesized by space vector modulation, resulting in a fixed switching frequency. Experimental results show that the proposed MPDSC has stronger robustness, and lower torque ripples and stator current harmonics compared to conventional PDSC.

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44

Lewicki, Arkadiusz, i Marcin Morawiec. "Structure and the space vector modulation for a medium‐voltage power‐electronic‐transformer based on two seven‐level cascade H‐bridge inverters". IET Electric Power Applications 13, nr 10 (23.05.2019): 1514–23. http://dx.doi.org/10.1049/iet-epa.2018.5886.

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45

Sakajo, Takashi. "Vortex crystals on the surface of a torus". Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 377, nr 2158 (30.09.2019): 20180344. http://dx.doi.org/10.1098/rsta.2018.0344.

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Vortex crystals are equilibrium states of point vortices whose relative configuration is unchanged throughout the evolution. They are examples of stationary point configurations subject to a logarithmic particle interaction energy, which give rise to phenomenological models of pattern formations in incompressible fluids, superconductors, superfluids and Bose–Einstein condensates. In this paper, we consider vortex crystals rotating at a constant speed in the latitudinal direction on the surface of a torus. The problem of finding vortex crystals is formulated as a linear null equation A Γ = 0 for a non-normal matrix A whose entities are derived from the locations of point vortices, and a vector Γ consisting of the strengths of point vortices and the latitudinal speed of rotation. Point configurations of vortex crystals are obtained numerically through the singular value decomposition by prescribing their locations and/or by moving them randomly so that the matrix A becomes rank deficient. Their strengths are taken from the null space corresponding to the zero singular values. The toroidal surface has a non-constant curvature and a handle structure, which are geometrically different from the plane and the spherical surface where vortex crystals have been constructed in the preceding studies. We find new vortex crystals that are associated with these toroidal geometry: (i) a polygonal arrangement of point vortices around the line of longitude; (ii) multiple latitudinal polygonal ring configurations of point vortices that are evenly arranged around the handle; and (iii) point configurations along helical curves corresponding to the fundamental group of the toroidal surface. We observe the strengths of point vortices and the behaviour of their distribution as the number of point vortices gets larger. Their linear stability is also examined. This article is part of the theme issue ‘Topological and geometrical aspects of mass and vortex dynamics’.

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46

Wang, Chunlei, Dongxing Cao, Xiangxu Qu i Chen Fan. "An Improved Finite Control Set Model Predictive Current Control for a Two-Phase Hybrid Stepper Motor Fed by a Three-Phase VSI". Energies 15, nr 3 (8.02.2022): 1222. http://dx.doi.org/10.3390/en15031222.

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In this paper, an improved finite control set model predictive current control (FCS-MPCC) is proposed for a two-phase hybrid stepper motor fed by a three-phase voltage source inverter (VSI). The conventional FCS-MPCC selects an optimal voltage vector (VV) from six active and one null VVs by evaluating a simple cost function and then applies the optimal VV directly to the VSI. Though the implementation is simple, it features a large current ripple and total harmonic distortion (THD). The proposed improved FCS-MPCC builds an extended control set consisting of 37 VVs to replace the original control set with only seven VVs. The increase in the amount of VVs helps to regulate the current more accurately. In each control period, the improved FCS-MPCC takes advantage of deadbeat control to calculate a reference VV, and only the three VVs adjacent to the reference VV are predicted and evaluated, which decrease the computational workload significantly. Build waveform patterns for all VVs in the unbalanced circuit structure to modulate the optimal VV using discrete space vector modulation, which improves the current quality in reducing current ripple and THD. The comparative simulations and experimental results validate the effectiveness of the proposed method.

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Cheng, Qi Ming, Xiao Qing Hu, Kai Wu, Yuan Fei Bai i Jin Bin Zhao. "The Research of Control Strategy for Three-Phase Photovoltaic Grid-Connected VSI Using Space Vector Pulse Width Modulation and P-Q Theory". Advanced Materials Research 608-609 (grudzień 2012): 38–41. http://dx.doi.org/10.4028/www.scientific.net/amr.608-609.38.

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This paper investigates the operation of a PV unit which is connected via a three-phase voltage-source inverter to the grid. The PV grid-connected control system is mainly related to a few key issues that are characteristics of photovoltaic cells, maximum power point tracking and grid-connected control of three-phase inverter. The control strategy of the three-phase PV grid-connected system is analyzed and studied by simulative experiment in this paper. A mathematical model of solar cells is established. Then the algorithms based on perturb & observe to track maximum power point is used. The structure of three-phase PV grid-connected system is introduced, and the current control method with Space Vector pulse width modulation (SVPWM) is examined and compared to other current control methods. The p-q theory is used to achieve uninterrupted compensation of the reactive power of the system. Simulative results on Matlab/Simulink software illustrate the reliability and superiority of this control strategy.

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Kryltcov, Sergei, Aleksei Makhovikov i Mariia Korobitcyna. "Novel Approach to Collect and Process Power Quality Data in Medium-Voltage Distribution Grids". Symmetry 13, nr 3 (12.03.2021): 460. http://dx.doi.org/10.3390/sym13030460.

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The paper is devoted to the development of the structure of a fast and flexible data collecting system based on the proposed approach to measure power quality indicators in three-phase medium-voltage distribution grids with an example of a Mikhailovsky mining and processing plant. The approach utilizes the properties of a space vector, obtained from grid currents and voltages with disturbed waveform, to allow faster extraction of the harmonic components compared to traditional approaches, based on the direct Fourier-transform applied to a line or phase values. During the study, the concept of a universal measurement device was introduced, which allows fast estimation of the following values at the grid node: magnitudes and phases of voltage and current harmonic components, active and reactive power of harmonics and fundamental components, positive and negative instantaneous powers. The structure of interconnected measurement and control units for the considered grid node with simultaneous operation of two active variable frequency drives with active rectifiers was proposed in accordance with a concept of the Internet of things. The benefits of the proposed solution are shown by the example of the model of the grid node with two operating draglines and nonlinear load, which was developed in MATLAB/Simulink software. The proposed approach was utilized to produce distributed references for control systems of grid inverters to compensate nonlinear currents, which allowed to significantly improve THDi of the grid node input power.

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Yáñez-Campos, Sergio Constantino, Gustavo Cerda-Villafaña i José Merced Lozano-García. "A Two-Grid Interline Dynamic Voltage Restorer Based on Two Three-Phase Input Matrix Converters". Applied Sciences 11, nr 2 (8.01.2021): 561. http://dx.doi.org/10.3390/app11020561.

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Energy quality problems can cause diverse failures of sensitive equipment. Dynamic voltage restorers (DVRs) are devices that have been proposed to protect sensitive loads from voltage sag effects. However, the compensation capacity of DVRs is limited by the amount of energy stored in the restorer. One way to overcome this limitation is to use the interline DVR (IDVR) structure in which two or more DVRs connected to different feeders share a common DC-link. This paper proposes a new IDVR topology based on two three-phase input matrix converters (TTI-MC) without a capacitor in the dc-link. The TTI-MC integrates the power from two feeders and synthesizes the dc-link voltage. The inverters take the dc-link voltage and generate the appropriate compensation voltages to keep the load voltages stable. Each one of the inverters has its own modulation algorithm which are synchronized with the TTI-MC control. Inverter control is carried out in the reference frame dq and a modified space vector pulse width modulation (MSV-PWM) technique is used. TTI-MC control is performed in the dq reference frame with proportional-integral controllers and the modulation is based on the carrier-based pulse width modulation (MCB-PWM) technique. The proposed Two Input Interline DVR (TI-IDVR) extends its compensation range and has multifunctional capabilities. The efficiency of the proposed TI-IDVR is corroborated by simulations on MATLAB/Simulink.

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50

Yáñez-Campos, Sergio Constantino, Gustavo Cerda-Villafaña i José Merced Lozano-García. "A Two-Grid Interline Dynamic Voltage Restorer Based on Two Three-Phase Input Matrix Converters". Applied Sciences 11, nr 2 (8.01.2021): 561. http://dx.doi.org/10.3390/app11020561.

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Energy quality problems can cause diverse failures of sensitive equipment. Dynamic voltage restorers (DVRs) are devices that have been proposed to protect sensitive loads from voltage sag effects. However, the compensation capacity of DVRs is limited by the amount of energy stored in the restorer. One way to overcome this limitation is to use the interline DVR (IDVR) structure in which two or more DVRs connected to different feeders share a common DC-link. This paper proposes a new IDVR topology based on two three-phase input matrix converters (TTI-MC) without a capacitor in the dc-link. The TTI-MC integrates the power from two feeders and synthesizes the dc-link voltage. The inverters take the dc-link voltage and generate the appropriate compensation voltages to keep the load voltages stable. Each one of the inverters has its own modulation algorithm which are synchronized with the TTI-MC control. Inverter control is carried out in the reference frame dq and a modified space vector pulse width modulation (MSV-PWM) technique is used. TTI-MC control is performed in the dq reference frame with proportional-integral controllers and the modulation is based on the carrier-based pulse width modulation (MCB-PWM) technique. The proposed Two Input Interline DVR (TI-IDVR) extends its compensation range and has multifunctional capabilities. The efficiency of the proposed TI-IDVR is corroborated by simulations on MATLAB/Simulink.

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