Journal articles: 'Soft Switching'

1

Klaassens, J. B., M. P. N. van Wesenbeeck, and P. Bauer. "Soft-Switching Power Conversion." EPE Journal 3, no. 3 (September 1993): 155–66. http://dx.doi.org/10.1080/09398368.1993.11463321.

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Xu, Wei, Xiaohua Wu, and Feng Hong. "Soft-switching buck inverter." Journal of Power Electronics 21, no. 1 (November 17, 2020): 113–25. http://dx.doi.org/10.1007/s43236-020-00175-8.

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3

Meynard, T. A., K. Al Haddad, and M. Rajagopalan. "Soft switching choppers: A study by the equivalent soft switching cell method." Canadian Journal of Electrical and Computer Engineering 15, no. 4 (November 1990): 158–66. http://dx.doi.org/10.1109/cjece.1990.6591512.

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4

Xiong, Yingjie. "An Improved Modulation Strategy on Boost Soft-Switching Converter." International Journal of Computer and Electrical Engineering 9, no. 2 (2017): 465–75. http://dx.doi.org/10.17706/ijcee.2017.9.2.465-475.

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5

Widjaja, I., A. Kurnia, K. Shenai, and D. M. Divan. "Switching dynamics of IGBTs in soft-switching converters." IEEE Transactions on Electron Devices 42, no. 3 (March 1995): 445–54. http://dx.doi.org/10.1109/16.368042.

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Liu, Shuai, Li Wei, Yi Cheng Zhang, Yong Tao Yao, Yun Xiong, and Tong Zhang. "Review of High Power DC/DC Soft-Switching Converters in Electrical Vehicles Application." Applied Mechanics and Materials 321-324 (June 2013): 340–46. http://dx.doi.org/10.4028/www.scientific.net/amm.321-324.340.

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The application of soft-switching techniques is an important way to reduce switching losses of DC/DC converter. Aiming at the requirement of electric vehicles application, major soft-switching techniques for DC/DC converters are reviewed. Performance and design limitations are discussed. A comparison of soft-switching techniques used in high power converters of electric vehicles is presented. Through analyzing the state-of-art and existing deficiency of soft-switching techniques for DC/DC converters, it is concluded that power level upgrading, soft-switching range extending and auxiliary network simplification should be focused in the future.

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Lin, Bor-Ren, and Jyun-Ji Chen. "Zero-voltage-switching/zero-current-switching soft-switching dual-resonant converter." International Journal of Electronics 97, no. 5 (May 2010): 569–85. http://dx.doi.org/10.1080/00207210903486849.

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8

HIRACHI, Katsuya. "Technical Trends of Soft-Switching." Journal of The Institute of Electrical Engineers of Japan 125, no. 12 (2005): 754–57. http://dx.doi.org/10.1541/ieejjournal.125.754.

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9

Szuromi, Phil. "Faster switching for soft magnets." Science 362, no. 6413 (October 25, 2018): 415.9–417. http://dx.doi.org/10.1126/science.362.6413.415-i.

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HUA, GUICHAO, and FRED C. LEE. "SOFT-SWITCHING PWM CONVERTER TECHNOLOGIES." Journal of Circuits, Systems and Computers 05, no. 04 (December 1995): 531–58. http://dx.doi.org/10.1142/s0218126695000333.

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The switched-mode power conversion technologies have evolved from the basic PWM converters to resonant converters, quasi-resonant converters, multi-resonant converters, and most recently, to soft-switching PWM converters. In this paper, several typical resonant techniques and several soft-switching PWM techniques are reviewed, and their merits and limitations are assessed. The resonant techniques reviewed include the quasi-resonant converters, multi-resonant converters, Class-E converters, and resonant dc link converters; and the soft-switching PWM techniques reviewed include the zero-voltage-switched (ZVS) quasi-square-wave converters, ZVS-PWM converters, zero-current-switched PWM converters, zero-voltage- transition PWM converters, and zero-current-transition PWM converters.

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11

Kasiran, A. N., A. Ponniran, A. A. Bakar, M. H. Yatim, M. K. R. Noor, and J. N. Jumadril. "Implementation of Resonant and Passive Lossless Snubber Circuits for DC-DC Boost Converter." International Journal of Engineering & Technology 7, no. 4.30 (November 30, 2018): 246. http://dx.doi.org/10.14419/ijet.v7i4.30.22276.

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This paper presents the comparison of resonant and passive lossless snubber circuits implementation for DC-DC boost converter to achieve soft-switching condition. By applying high switching frequency, the volume reduction of passive component can be achieved. However, the required of high switching frequency cause the switching loss during turn-ON and turn-OFF condition. In order to reduce the switching loss, soft-switching technique is required in order to reduce or eliminate the losses at switching devices. There are various of soft-switching techniques can be considered, either to reduce the switching loss during turn-ON only, or turn-OFF only, or both. This paper discusses comparative analyses of resonant and passive lossless snubber circuits which applied in the DC-DC boost converter structure. Based on the simulation results, the switching loss is approximately eliminated by applying soft-switching technique compared to the hard-switching technique implementation. The results show that the efficiency of resonant circuit and passive lossless snubber circuit are 82.99% and 99.24%, respectively. Therefore, by applying passive lossless snubber circuit in the DC-DC boost converter, the efficiency of the converter is greatly increased. Due to the existing of an additional capacitor in soft-switching circuit, it realizes lossless operation of DC-DC boost converter.

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12

Kasiran, A. N., Asmarashid Ponniran, A. A. Bakar, and M. H. Yatim. "4-level capacitor-clamped boost converter with hard-switching and soft-switching implementations." International Journal of Power Electronics and Drive Systems (IJPEDS) 10, no. 1 (March 1, 2019): 288. http://dx.doi.org/10.11591/ijpeds.v10.i1.pp288-299.

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This paper presents parameters analysis of 4-level capacitor-clamped boost converter with hard-switching and soft-switching implementation. Principally, by considering the selected circuit structure of the 4-level capacitor-clamped boost converter and appropriate pulse width modulation (PWM) switching strategy, the overall converter volume able to be reduced. Specifically, phase-shifted of 120° of each switching signal is applied in the 4-level capacitor-clamped boost converter in order to increase the inductor current ripple frequency, thus the charging and discharging times of the inductor is reduced. Besides, volume of converters is greatly reduced if very high switching frequency is considered. However, it causes increasing of semiconductor losses and consequently the converter efficiency is affected. The results show that the efficiency of 2-level conventional boost converter and 4-level capacitor-clamped boost converter are 98.59% and 97.67%, respectively in hard-switching technique, and 99.31% and 98.15%, respectively in soft-switching technique. Therefore, by applying soft-switching technique, switching loss of the semiconductor devices is greatly minimized although high switching frequency is applied. In this study, passive lossless snubber circuit is selected for the soft-switching implementation in the 4-level capacitor-clamped boost converter. Based on the simulation results, the switching loss is approximately eliminated by applying soft-switching technique compared to the hard-switching technique implementation.

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13

Kani, N. Ismayil, B. V. Manikandan, and Prabakar Perciyal. "A Novel Soft Switching Based Fuzzy Logic Control for Single Phase Inverter." Applied Mechanics and Materials 573 (June 2014): 143–49. http://dx.doi.org/10.4028/www.scientific.net/amm.573.143.

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—This The Pulse Width Modulation (PWM) DC-to-AC inverter has been widely used in many applications due to its circuit simplicity and rugged control scheme. It is however driven by a hard-switching pulse width modulation (PWM) inverter, which has low switching frequency, high switching loss, high electro-magnetic interference (EMI), high acoustic noise and low efficiency, etc. To solve these problems of the hard-switching inverter, many soft-switching inverters have been designed in the past. Unfortunately, high device voltage stress, large dc link voltage ripples, complex control scheme and so on are noticed in the existing soft-switching inverters. This proposed work overcomes the above problems with simple circuit topology and all switches work in zero-voltage switching condition. Comparative analysis between conventional open loop, PI and fuzzy logic based soft switching inverter is also presented and discussed. Keywords—Zero voltage switching, Inverter, Dc link, PI controller, Fuzzy logic system control ,Modulation strategy, Soft switching

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14

Arian, Ali, and Mohammad Yazdani. "An Interleaved Switching Buck Converter with Soft Switching Condition." Journal of Iranian Association of Electrical and Electronics Engineers 18, no. 4 (July 1, 2021): 19–29. http://dx.doi.org/10.52547/jiaeee.18.4.19.

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15

Choi, Minho, and Deog-Kyoon Jeong. "Design of Soft-Switching Hybrid DC-DC Converter with 2-Phase Switched Capacitor and 0.8nH Inductor for Standard CMOS Process." Electronics 9, no. 2 (February 21, 2020): 372. http://dx.doi.org/10.3390/electronics9020372.

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A soft-switching hybrid DC-DC converter with a 2-phase switched capacitor is proposed for the implementation of a fully-integrated voltage regulator in a 65 nm standard CMOS process. The soft-switching operation is implemented to minimize power loss due to the parasitic capacitance of the flying capacitor. The 2-phase switched capacitor topology keeps the same resonance value for every soft-switching operation, resulting in minimizing the voltage imbalance of the flying capacitor. The proposed adaptive timing generator digitally calibrates the turn-on delay of switches to achieve a complete soft-switching operation. The simulation results show that the proposed soft-switching hybrid DC-DC converter with a 2-phase 2:1 switched capacitor improves the efficiency by 5.1% and achieves 79.5% peak efficiency at a maximum load current of 250 mA.

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16

Yu, Yun Jun, Sui Peng, Zi Heng Xu, Chao Tong, and Yun Tao Xue. "A Photovoltaic Soft Switching Boost Circuit." Applied Mechanics and Materials 599-601 (August 2014): 631–38. http://dx.doi.org/10.4028/www.scientific.net/amm.599-601.631.

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This paper study a new type of photovoltaic soft switching boost circuit according the present photovoltaic soft switching boost circuit auxiliary switch worked in hard switching situation and the gain of soft switching boost circuit is not good. The operation principle of the circuit and the detailed implementation process was analyzed. The parameters of the circuit were counted. The phase shifting control algorithm was used to control the circuit. The soft switching boost circuit has the following characteristics: (1) The main switch and auxiliary switch can realize zero current zero voltage turn-on and turn off, improve the conversion efficiency of DC side; (2) The boost effect is good and the gain is high; (3) High output power quality, voltage fluctuation is low; (4) The control is simple.

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Charin, Chanuri, Nur Fairuz Mohamed Yusof, Mazwin Mazlan, and Noor Haqkimi Adb Rahman. "A Soft Switching Full-Bridge DC-DC Converter with Active Auxiliary Circuit." Applied Mechanics and Materials 793 (September 2015): 232–36. http://dx.doi.org/10.4028/www.scientific.net/amm.793.232.

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DC-DC converters are widely used in many applications such as power supplies, PV system, renewable energy systems and industrial applications. One of the main problems in dc-dc converters is the switching loss which affects efficiency and also the power density of the converter. To alleviate the switching loss problem this paper proposes novel soft switching PWM isolated dc-dc converters topology. The proposed full bridge dc-dc converter with active auxiliary circuit is designed and tested with full-bridge rectifier diode. The proposed converter is designed and evaluated in term of soft switching. In the proposed topology, the soft switching operations are achieved by charging and discharging process of the capacitor and additional switches. In the proposed topology, all the power switches operate under soft-switching conditions. Therefore, the overall switching loss of the power switches is greatly reduced. The output voltage of the converter is varied by PWM control. The effectiveness of the new converter topology is evaluated by experimental results of a laboratory scale down prototype. The obtained experimental results are found agreed with theoretical and soft switching is achieved.

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18

Sayed, Khairy, Mohammed G. Gronfula, and Hamdy A. Ziedan. "Novel Soft-Switching Integrated Boost DC-DC Converter for PV Power System." Energies 13, no. 3 (February 8, 2020): 749. http://dx.doi.org/10.3390/en13030749.

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This paper presents a novel soft-switching boost DC-DC converter, which uses an edge-resonant switch capacitor based on the pulse width modulation PWM technique. These converters have high gain voltage due to coupled inductors, which work as a transformer, while the boost converter works as a resonant inductor. Upon turning on, the studied soft switching circuit works at zero-current soft switching (ZCS), and upon turning off, it works at zero-voltage soft switching (ZVS) while using active semiconductor switches. High efficiency and low losses are obtained while using soft switching and auxiliary edge resonance to get a high step-up voltage ratio. A prototype model is implemented in the Power Electronics Laboratory, Assiut University, Egypt. Seventy-two-panel PV modules of 250 W each were used to simulate and execute the setup to examine the proposed boost converter.

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Kadhem, Basim Talib, Sumer S. Hardan, and Khalid M. Abdulhassan. "High-performance Cuk converter with turn-on switching at zero voltage and zero current." Bulletin of Electrical Engineering and Informatics 12, no. 3 (June 1, 2023): 1359–70. http://dx.doi.org/10.11591/eei.v12i3.4499.

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The soft-switching technique has the potential to significantly enhance the performance of the power converter. This is primarily because it allows for an increase in the switching frequency, which ultimately leads to improved modulation quality. This raises extra concerns, particularly in high-power applications, because in a standard hard-switching converter structure, components can often not function at frequencies higher than a few hundred hertz. This paper presents a high-efficiency soft switching CUK converter.When the main and auxiliary switches are turned on and off at zero voltage, the proposed converter yields zero voltage and zero current. The suggested method is ideal for a DC-DC converter based on IGBTs or MOSFETs. The recommended systems are described using theoretical analysis, the results of computer simulations, and experimental data derived from a prototype. The design parameters of the inductance and capacitor circuit for edge-resonant soft switching were obtained using the output power and the switching duty ratio. In the end, soft-switching is better than hard-switching in terms of efficiency, particularly when operating under full load.

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20

Shen, Zhong Hong, Lin Yang, Qun Xing Liu, Wen Li Zhu, Chun Xu Jiang, and Xiao Kang Chen. "A Novel Design of Soft Switching Based on Three-Phase Current Source Inverter." Applied Mechanics and Materials 433-435 (October 2013): 1218–25. http://dx.doi.org/10.4028/www.scientific.net/amm.433-435.1218.

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This paper presents a novel soft switching topology and its control method applied on three-phase current source inverter. The main switch transistors of the inverter can be achieved in soft switching on the current pass-through step, which can reduce switch stress and improve efficiency. The soft switching circuit consists of two auxiliary switch transistors and some passive devices, such as inductor, capacitor and diode. It has many advantages as follows, simple control, fewer devices, high reliability, and so on. This paper analyzes the principle of soft switching circuit, and simulate by using the current space vector control method with MATLAB. The simulation results demonstrate the feasibility of the method.

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Ota, Ryosuke, Dannisworo Sudarmo Nugroho, and Nobukazu Hoshi. "A Consideration on Maximum Efficiency of Resonant Circuit of Inductive Power Transfer System with Soft-Switching Operation." World Electric Vehicle Journal 10, no. 3 (September 11, 2019): 54. http://dx.doi.org/10.3390/wevj10030054.

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By using bi-directional inductive power transfer (IPT) systems as battery chargers for electric vehicles (EVs), battery charging operations become convenient and safe. However, IPT systems have problems such as occurrences of much electromagnetic noise and power loss because the converters of IPT systems are driven in high frequency by tens of kHz. To solve these problems, there is a case where the soft-switching technique needs to be applied to the converters of IPT systems. However, in soft-switching operation, the power factor of the resonant circuit becomes lower, resulting in a lower resonant circuit efficiency. In previous works, when the soft-switching technique was applied to the converters, the resonant circuit had not always been able to be operated with high efficiency because the influence caused by soft-switching operation had not been considered. For this reason, there was a case where the efficiency of the overall system with soft-switching operation became lower than the efficiency in hard-switching operation. Therefore, in this paper, the influence on the efficiency of the resonant circuit caused by the soft-switching operation is clarified by the theoretical analysis and experiments; then, the guideline for improving the efficiency of IPT systems is shown. As a result, in the experiments, it could be understood that the efficiency of the overall system with soft-switching operation becomes higher than the efficiency in hard-switching operation when the operating point of the resonant circuit was close to the requirement guideline, which is shown by using the primary-side voltage and the secondary-side voltage of the resonant circuit. Therefore, it is suggested that the efficiency of IPT systems could be improved by properly regulating the primary-side direct current (DC) voltage.

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Mohammed Dobi, Abdul-Hakeem, Mohd Rodhi Sahid, and Tole Sutikno. "Overview of Soft-Switching DC-DC Converters." International Journal of Power Electronics and Drive Systems (IJPEDS) 9, no. 4 (December 1, 2018): 2006. http://dx.doi.org/10.11591/ijpeds.v9.i4.pp2006-2018.

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Application of soft switching in DC-DC converter has achieved a remarkable success in power electronics technology in terms of reduction in switching losses, improve in power density, minimization of electromagnetic interference (EMI) and reduction in the volume of DC-DC converters. Quite a number of soft switching techniques had been reported in the past four decades. This paper aims at providing a review of various soft switching techniques, based on topology, the location of the resonant network, performance characteristics, and principles of operation. In addition, converters area of application, advantages as well as limitations are also highlighted.

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Do, Hyun Lark. "Soft-Switching Boost Half-Bridge Converter with High Voltage Gain and Low Input Current Ripple." Advanced Materials Research 424-425 (January 2012): 1093–96. http://dx.doi.org/10.4028/www.scientific.net/amr.424-425.1093.

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A soft-switching boost half-bridge converter with high voltage gain and low input current ripple is proposed in this paper. In the proposed converter, a coupled inductor is used at the boost converter stage to reduce the input current ripple. The half-bridge converter stage provides soft-switching operation and high voltage gain. Also, the reverse-recovery problem of output diodes is significantly alleviated by utilizing the leakage inductance of the transformer. Due to the soft-switching operation of all switching devices, the switching loss is significantly reduced and the high efficiency is obtained. The feasibility and performance of the proposed converter were verified on an experimental prototype

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Jiang, Maoh Chin, Huang Kai Fu, and Kao Yi Lu. "A Single-Phase Soft-Switching Unipolar PWM Rectifier." Applied Mechanics and Materials 284-287 (January 2013): 2439–44. http://dx.doi.org/10.4028/www.scientific.net/amm.284-287.2439.

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This paper proposed a novel single-phase soft-switching unipolar PWM rectifier (SSUPR) using a simple auxiliary resonant unit. All main switches of high-frequency arm operate at zero-voltage-switching (ZVS) turn-on, while the auxiliary switches operate at zero-current-switching (ZCS) turn-off. All main switches of low-frequency arm operate at 60 Hz to greatly reduce switching losses. Moreover, a soft-switching unipolar PWM strategy is used for the proposed soft-switching rectifier. This strategy results in a better input current waveform than for the bipolar PWM strategy. Furthermore, the proposed rectifier achieves a near unity power factor, a sinusoidal input current and a bidirectional power flow capability. Some experimental results of the proposed SSUPR, rated 500 W and operated at 40 kHz, are presented for verification.

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Li, Zimeng, Mingxue Li, Yushun Zhao, Zixiang Wang, Dongsheng Yu, and Ruidong Xu. "An Optimized Control Method of Soft-Switching and No Backflow Power for LLC Resonant-Type Dual-Active-Bridge DC-DC Converters." Mathematics 11, no. 2 (January 5, 2023): 287. http://dx.doi.org/10.3390/math11020287.

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The LLC-type resonant dual-active-bridge (LLC-DAB) DC-DC converter with a high voltage gain, high power density, and low backflow power has attracted increasing attention in recent years. However, its soft-switching and backflow power problems are still not solved, so the improvements to these problems are studied in this paper. Based on the dual phase shift (DPS) modulation method, the operating characteristics are analyzed, and a soft-switching and no backflow power modulation curve is established based on the voltage-current time-domain characteristics. On this basis, a soft-switching and no backflow power optimized control method based on DPS modulation is proposed to achieve soft-switching operation and eliminate backflow power. Due to the complex time-domain characteristics of the resonant tank voltage and current, the relationship between the phase shift ratios is fitted and optimized with this method based on the soft-switching and no backflow power characteristic curve, and the optimized results of the phase shift ratio under different operating conditions are obtained. The simulation results indicate that the soft-switching operation of the LLC-DAB converter can be achieved with the optimized control method proposed in this paper, and the backflow power is effectively eliminated.

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Kadhem, Basim Talib, Sumer Sahib Harden, Osama Yaseen Khudair Alatbee, and Khalid M. Abdulhassan. "Improve the energy efficiency of PV systems by installing a soft switching boost converter with MPPT control." International Journal of Power Electronics and Drive Systems (IJPEDS) 14, no. 2 (June 1, 2023): 1055. http://dx.doi.org/10.11591/ijpeds.v14.i2.pp1055-1069.

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<span lang="EN-US">To improve the energy consumption rate of solar cells and reduce switching loss, a maximum power point tracking (MPPT) control approach is presented to manage the boost converter and achieve soft switching. A method for determining the optimal values of the soft switching boost converter design parameters has been proposed, by determining the ideal values for the inductor, capacitor, and duty cycle of the boost converter with soft switching, this method enables the key matching of the PV system with the DC/DC converter configuration. In addition to presenting an analysis of several MPPT methodologies, the entire design of the PV converter system is also included. This study compares the perturb-and-observe (P&O) method and the incremental conductance (IC) method for maximum power point tracking (MPPT) in the MATLAB/Simulink application. The PV systems with both MPPT algorithms have been simulated beginning with an implemented model of the photovoltaic (PV) array together with the soft switching boost converter and its MPPT control. The simulation results based on irradiance and temperature are then shown. In the end, soft-switching is more efficient than hard-switching, especially when operating at full load.</span>

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M'barki, Zakaria, Kaoutar Senhaji Rhazi, and Youssef Mejdoub. "A novel fuzzy logic control for a zero current switching-based buck converter to mitigate conducted electromagnetic interference." International Journal of Electrical and Computer Engineering (IJECE) 13, no. 2 (April 1, 2023): 1423. http://dx.doi.org/10.11591/ijece.v13i2.pp1423-1436.

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<span lang="EN-US">This research provides a new control technique for mitigating conducted electromagnetic interference (EMI) in a buck converter designed for solar applications. Indeed, hard-switching direct current to direct current (DC-DC) converters, commonly used in industrial applications, pose a significant risk to the surrounding environment regarding electromagnetic compatibility (EMC). Usually, the fast-switching phase induces abrupt changes in current and voltage, which adds to substantial electromagnetic interference in both conducted and radiated modes and excessive auditory noise. An architecture based on the duality of soft-switching topology and fuzzy logic control technology is developed to address these issues. On the one hand, resonant circuit topologies are used to induce switches to achieve soft switching conditions, which subsequently lessen the effects of EMI. On the other hand, the adoption of fuzzy logic control technology is interesting since it can reduce electrical stresses during switching. Furthermore, the simulation results show that zero current switching (ZCS) soft-switching closed-loop fuzzy logic converters outperform typical open-loop converters and soft-switching closed-loop converters with proportional integral (PI) control in terms of EMC requirements.</span>

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M'barki, Zakaria, Ali Ait Salih, Youssef Mejdoub, and Kaoutar Senhaji Rhazi. "Strategic electromagnetic interferences suppression in boost converters: zero-switch techniques." International Journal of Advances in Applied Sciences 13, no. 2 (June 1, 2024): 340. http://dx.doi.org/10.11591/ijaas.v13.i2.pp340-350.

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This article delves into the growing demand for efficient power conversion technologies accompanying the rise in electric vehicle (EV) adoption. Boost converters, essential for increasing the battery pack voltage to propel EV motors, pose a challenge due to the electromagnetic interference (EMI) generated by the high switching frequency of power devices. To address this issue, practitioners employ zero-voltage switching (ZVS) and zero-current switching (ZCS) techniques. In this comparative study, we systematically evaluate the effectiveness of these soft switching techniques in reducing conducted EMI in boost converters designed for EV applications. The results illuminate the potential of both ZVS and ZCS in significantly mitigating EMI emissions when compared to conventional hard-switching methods. Notably, ZVS soft switching emerges as more efficient and effective, particularly under higher loads, while ZCS soft switching excels in reducing EMI at lighter loads. In conclusion, the study asserts that ZVS soft switching presents a more promising solution for curtailing conducted EMI in boost converters for EV applications, particularly in high-load scenarios. However, it underscores the importance of considering specific operational conditions when deciding between the two techniques.

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Lascu, Dan, Pavol Bauer, Mircea Babaita, Mihaela Lascu, Viorel Popescu, Adrian Popovici, and Dan Negoitescu. "Distance Education in Soft-Switching Inverters." Journal of Power Electronics 10, no. 6 (November 20, 2010): 628–34. http://dx.doi.org/10.6113/jpe.2010.10.6.628.

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Emrani, Amin, Mohammad Mahdavi, and Ehsan Adib. "Soft Switching Bridgeless PFC Buck Converters." Journal of Power Electronics 12, no. 2 (March 20, 2012): 268–75. http://dx.doi.org/10.6113/jpe.2012.12.2.268.

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31

Hua, G., and F. C. Lee. "Soft-switching techniques in PWM converters." IEEE Transactions on Industrial Electronics 42, no. 6 (1995): 595–603. http://dx.doi.org/10.1109/41.475500.

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Lio, J. B., M. S. Lin, D. Y. Chen, and W. S. Feng. "Single-switch soft-switching flyback converter." Electronics Letters 32, no. 16 (1996): 1429. http://dx.doi.org/10.1049/el:19960984.

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Chen, Hao, and Deepak Divan. "Soft-Switching Solid-State Transformer (S4T)." IEEE Transactions on Power Electronics 33, no. 4 (April 2018): 2933–47. http://dx.doi.org/10.1109/tpel.2017.2707581.

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Xinbo Ruan, Linquan Zhou, and Yangguang Yan. "Soft-switching PWM three-level converters." IEEE Transactions on Power Electronics 16, no. 5 (September 2001): 612–22. http://dx.doi.org/10.1109/63.949494.

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How-Lung Eng and Kai-Kuang Ma. "Noise adaptive soft-switching median filter." IEEE Transactions on Image Processing 10, no. 2 (2001): 242–51. http://dx.doi.org/10.1109/83.902289.

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Taniguchi, Katsunori. "Soft-Switching Power Factor Corrected Converter." Journal of the Japan Institute of Power Electronics 35 (2010): 23–32. http://dx.doi.org/10.5416/jipe.35.23.

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Chen, T. H., and C. M. Liaw. "Soft-switching inverter for electrodynamic shaker." IEE Proceedings - Electric Power Applications 146, no. 5 (1999): 515. http://dx.doi.org/10.1049/ip-epa:19990413.

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Aredes, M., C. Portela, and E. H. Watanabe. "HVDC tapping using soft switching techniques." Electrical Engineering (Archiv fur Elektrotechnik) 83, no. 1-2 (February 15, 2001): 33–40. http://dx.doi.org/10.1007/s002020000060.

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Koumboulis, Fotis N., Dimitrios G. Fragkoulis, Nikolaos D. Kouvakas, and Aikaterini Feidopiasti. "Soft Sensor Design via Switching Observers." Sensors 23, no. 4 (February 13, 2023): 2114. http://dx.doi.org/10.3390/s23042114.

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The goal of the paper is the design of soft sensors for single input single output (SISO) nonlinear processes. This goal is of essential importance for process monitoring, fault detection and fault isolation. The observer-based technique, being a fruitful direction in soft sensor design, is followed to develop soft sensors for nonlinear processes with known dynamics and unknown physical parameters. A new and general approach, based on the identified I/O linear approximant system descriptions, around prespecified operating points, and a bank of switching linear observers, will be developed. The system property of the I/O reconstructability of the state space linear approximant of a nonlinear model is presented. The design of each observer is based on the I/O measurements and structural characteristics of the nonlinear process. Observer-oriented target areas are introduced, and the respective dense web principle is formulated. The design is completed by the design of a data-driven rule-based system, providing stepwise switching among the observers of the bank. The number of observers of the bank is equal to the number of the linear approximants of the nonlinear process model and is equal to the number of the respective target operating areas. The target operating areas are required to satisfy the dense web principle. The information provided by the soft sensor is the estimation of the non-measured variables of the process. The information used by the soft sensor is the identified I/O approximants of the process as well as the real time values of the measurement variables. The efficiency of the design scheme is illustrated through symbolic and numerical simulation results for a chemostat. The nonlinear model of the chemostat is initially approximated by a set of ten linear approximants. After, the I/O approximants are identified, the respective observers are designed and the target operating areas are determined, where several cases of the satisfaction of the dense web principle are investigated. The soft sensor is composed in terms of the designed observers. Simulation results illustrate the satisfactory performance of the designed soft sensor.

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Mohapatra, Mohamayee, A. K. Panda, B. P. Panigrahi, Prativa Priyadarshini Sahoo, and B. Chitti Babu. "A Comparative Analysis of Single Switch Soft-Switching Boost Converter and Interleaved Soft-Switching Boost Converter." Journal of Low Power Electronics 13, no. 1 (March 1, 2017): 83–93. http://dx.doi.org/10.1166/jolpe.2017.1462.

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Cheng, Weizheng, Fusheng Wang, and Rui Li. "Optimal control strategy of global return power based on soft switching under triple phase-shift control." Journal of Physics: Conference Series 2290, no. 1 (June 1, 2022): 012068. http://dx.doi.org/10.1088/1742-6596/2290/1/012068.

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Abstract Return power and soft switching are important performance indicators for dual active bridge DC-DC converters (DAB). Aiming at the problem that the DAB converter has a large return power under the traditional control strategy, a control strategy that optimizes the return power in the full power range is proposed, and on this basis, the soft switching range of the switching device is increased. The control strategy not only ensures the minimum return power in the entire power range, but also increases the soft switching range, reduces the switching loss, and further improves the efficiency. Finally, an experimental platform is built for verification, and the experimental results verify the validity of the theoretical analysis.

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Yau, Yeu-Torng, Kuo-Ing Hwu, and Jenn-Jong Shieh. "Simple Structure of Soft Switching for Boost Converter." Energies 13, no. 20 (October 19, 2020): 5448. http://dx.doi.org/10.3390/en13205448.

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A soft switching boost converter, with a small number of components and constant frequency control, is proposed herein by using the quasi-resonance method and the zero-voltage-transition method, realizing (1) the zero-voltage switching during the switch-on transient of the main switch, (2) the zero-current switching during the switch-off transient of the main switch, (3) the zero-current switching during the switch-on transient of the auxiliary switch, and (4) the zero-current switching during the switch-off transient of the auxiliary switch. Accordingly, the corresponding efficiency can be improved. The feasibility and effectiveness of the proposed structure are validated by the field programmable gate array (FPGA).

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Tao, Haijun, Yiming Zhang, and Xiguo Ren. "Small-Signal Modeling of Marine Electromagnetic Detection Transmitter Controlled-Source Circuit." Mathematical Problems in Engineering 2015 (2015): 1–9. http://dx.doi.org/10.1155/2015/754379.

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Marine electromagnetic transmitter transmits electromagnetic waves with large power frequency conversion to the seabed to obtain the submarine structure and mineral resources. However, the current transmitter presents several problems, such as low efficiency, serious heat, and poor adaptability to the load. Soft-switching controlled-source circuit is used to reduce circuit losses. The mathematical model of controlled-source circuit should be established to realize a closed-loop control for increasing the output transient performance of electromagnetic waves. Given that the soft-switching controlled-source circuit has more status and that direct modeling is difficult, small-signal model of soft-switching controlled-source circuit is established based on that of hard-switching controlled-source circuit by analyzing the effect of output filter inductor current transformer leakage inductance and input voltage soft-switching controlled circuit on change in the duty cycle. Finally, experiments verify the accuracy and validity of the model.

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Zeng, Jun Yan, Guang Di Li, Xue Liang, Jiao Wang, and Zhi Da Li. "Topological Structure of Main Circuit Inverter Based on Soft-Switching Technology and Parameters Adaptive." Advanced Materials Research 846-847 (November 2013): 732–36. http://dx.doi.org/10.4028/www.scientific.net/amr.846-847.732.

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This paper presents a new topology of main circuit based on soft switching technology of ZVS-PWM. At present, hard switching is applied in most inverters. Because the switching power isnt equal to zero, a great number of losses on the switching are generated when the switching at a high frequency. To solve the fault of hard switching, this paper presents that apply the inverter circuits based on soft switching technology of ZVS-PWM to high frequency APF, which will decrease switching losses and noise greatly. The proposed topology and operation principle of the control method is discussed in detail, finally simulated results verify the effect of research.

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Rajalakshmi, P. "A Dual-transformer DC–DC with Variable frequency modulation Technique." Journal of Energy Engineering and Thermodynamics, no. 23 (May 30, 2022): 15–23. http://dx.doi.org/10.55529/jeet.23.15.23.

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For renewable power production systems to use less energy overall, power converters with improved efficiency over a wider load range are crucial. We introduce an unique dual-transformer DC-DC converter with many resonant components. With the right choice of resonance parameters, the converter can achieve a broad DC voltage gain range thanks to several resonance features. More resonance frequencies are included in the proposed converter as well, which will allow the load to receive more of the tertiary active power. Diodes achieve soft-switching or quasi-soft-switching during both the on and off periods, and all power switches are capable of on-soft switching. The proposed and analysis of variable frequency modulation (VFM) are achieved. By providing soft switching throughout the whole load range, the suggested modulation approach can lower switching losses. Additionally, the center-tapped bridge implementation of the synchronous rectifier further reduces conduction losses while the proposed modulation technique ensures soft switching of all devices. We installed a 500W prototype in the laboratory to confirm the theoretical analysis. According to the findings of the experiments, the suggested converter can maintain a relatively high efficiency (95%) throughout a wide load range. Starting with 300W, the highest efficiency is 95.4%.

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Rajalakshmi, P. "A Dual-transformer DC–DC with Variable frequency modulation Technique." Journal of Image Processing and Intelligent Remote Sensing, no. 12 (November 25, 2021): 8–16. http://dx.doi.org/10.55529/jipirs.12.8.16.

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For renewable power production systems to use less energy overall, power converters with improved efficiency over a wider load range are crucial. We introduce an unique dual-transformer DC-DC converter with many resonant components. With the right choice of resonance parameters, the converter can achieve a broad DC voltage gain range thanks to several resonance features. More resonance frequencies are included in the proposed converter as well, which will allow the load to receive more of the tertiary active power. Diodes achieve soft-switching or quasi-soft-switching during both the on and off periods, and all power switches are capable of on-soft switching. The proposed and analysis of variable frequency modulation (VFM) are achieved. By providing soft switching throughout the whole load range, the suggested modulation approach can lower switching losses. Additionally, the center-tapped bridge implementation of the synchronous rectifier further reduces conduction losses while the proposed modulation technique ensures soft switching of all devices. We installed a 500W prototype in the laboratory to confirm the theoretical analysis. According to the findings of the experiments, the suggested converter can maintain a relatively high efficiency (95%) throughout a wide load range. Starting with 300W, the highest efficiency is 95.4%.

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Yu, Yan, Chao Ma, and Wen Bin Ma. "Experimental Study on Improved Phase-Shift Control Soft-Switching Converter." Advanced Materials Research 418-420 (December 2011): 1772–75. http://dx.doi.org/10.4028/www.scientific.net/amr.418-420.1772.

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A novel phase-shifted Soft-switching converter is presented in this thesis，which is based on the Tou structural, groundwork of summarization of the development of lower Electronics in recent years and lucubration in theoretical basis of modern high frequency soft switching power convert technique and analysis of operation principle, characteristic of the circuit and inherent drawbacks of traditional phase-shifted Soft-switching converter. Explicit description of main circuit topology, operation principle, characteristic of the circuit of the novel phase-shifted Soft-switching converter as well as the simulation analysis with the PSPICE software is proposed. The main works that I did: The design involves calculation of transformer, inductor and capacitance in main circuit, parameter selection of each element and realization of control circuit. Electric circuit Tou structural is verified by emulation experiment. The electric circuit reduces availably switch exhaust of traditional soft switch transformation electric circuit. The experiment proved to the possibility of the reformed prefect. The experiment has important reference value to improved soft switch transformation.

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Wang, Jie-Sheng, and Na-Na Shen. "Hybrid Multiple Soft-Sensor Models of Grinding Granularity Based on Cuckoo Searching Algorithm and Hysteresis Switching Strategy." Scientific Programming 2015 (2015): 1–11. http://dx.doi.org/10.1155/2015/146410.

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According to the characteristics of grinding process and accuracy requirements of technical indicators, a hybrid multiple soft-sensor modeling method of grinding granularity is proposed based on cuckoo searching (CS) algorithm and hysteresis switching (HS) strategy. Firstly, a mechanism soft-sensor model of grinding granularity is deduced based on the technique characteristics and a lot of experimental data of grinding process. Meanwhile, the BP neural network soft-sensor model and wavelet neural network (WNN) soft-sensor model are set up. Then, the hybrid multiple soft-sensor model based on the hysteresis switching strategy is realized. That is to say, the optimum model is selected as the current predictive model according to the switching performance index at each sampling instant. Finally the cuckoo searching algorithm is adopted to optimize the performance parameters of hysteresis switching strategy. Simulation results show that the proposed model has better generalization results and prediction precision, which can satisfy the real-time control requirements of grinding classification process.

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Kasiran, Mohd Amirul Naim, Asmarashid Ponniran, Nurul Nabilah Mad Siam, Mohd Hafizie Yatim, Nor Azmira Che Ibrahim, and Asmawi Md Yunos. "DC-DC converter with 50 kHz-500 kHz range of switching frequency for passive component volume reduction." International Journal of Electrical and Computer Engineering (IJECE) 11, no. 2 (April 1, 2021): 1114. http://dx.doi.org/10.11591/ijece.v11i2.pp1114-1122.

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This paper presents the relationship of switching frequency towards passive components volume of DC-DC boost converter. Principally, the inductor current ripple and capacitor voltage ripple must be considered in order to design the inductor and capacitor, respectively. By increasing the switching frequency, smaller size and volume of passive component can be designed. As the consequences, the switching loss increases during switching transition at turn-ON and turn-OFF conditions. This paper used soft-switching technique to reduce the switching loss at turn-ON condition. The soft-switching technique is realized by adding resonant circuit in DC-DC boost converter. The effectiveness of resonant circuit will be analysed, thus, the efficiency of the converter can be improved. The range of switching frequency considered in the experimental are 50 kHz to 500 kHz. A 100 W prototype has been developed and tested in order to verify the principle. The switching loss experimentally confirm reduced by implementing soft-switching technique with efficiency converter improved from 96.36% to 97.12% when 500 kHz of switching frequency is considered. The passive components volume reduction is achieved when high switching frequency is used where the total volume of passive component when 50 kHz and 500 kHz are 0.083 dm3 and 0.010 dm3, respectively.

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Yang, Fang, Zhao Hui Liu, and Jian Wei Zhang. "Design of Resonant Soft-Switching Grid-Connected Inverter." Applied Mechanics and Materials 263-266 (December 2012): 43–47. http://dx.doi.org/10.4028/www.scientific.net/amm.263-266.43.

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This paper discusses the topology requirements of the small power photovoltaic grid-connected inverter,and introduces several typical topologies,moreover,points out the advantages and disadvantages,efficiency and applicable occasions of the various topologies. In this paper,a single-phase full-bridge grid-connected inverter topology(DC/AC) is designed. The soft-switching technology is employed on the topology for reducing switching loss. The topology can realizes zero voltage switching when the main switch turns on and turns off and zero current switching when auxiliary switch and the power diode turns on and turns off.The converter has higher efficiency than other topologies.

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Journal articles on the topic 'Soft Switching'

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