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Showing 1 to 11 of 11 for “"ZVT"”.
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Analysis of Inductor-Coupled Zero-Voltage-Transition Converters
… auxiliary circuits of Zero-Voltage-Transition (ZVT) inverters. Simplifying the auxiliary circuits results in both a smaller number of and lower cost for auxiliary components, without any negative impact on performance. This dissertation proposes two major concepts for the simplification - the …
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Soft-switching techniques for pulse-width-modulated converters
… PWM converters, the zerovoltage- transition (ZVT) PWM converters, and the zero-current-transition (ZCT) PWM converters. The family of ZVS- and ZCS-PWM converters are developed to improve the performance of the ZVS and ZCS quasi-resonant converters, respectively. The principles of operations of …
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Modeling and control of zero-voltage transition three-phase PWM boost rectifier
… boost rectifier is performed. The effect of ZVT is introduced in the existing model for the three-phase boost rectifier using the time-averaging equivalent circuit approach. The small signal model is derived from the average model. The small signal characteristics are compared to the …
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Soft-switching techniques for high-power PWM converters
… The three-phase zero-voltage transition (ZVT) boost rectifiers/voltage source inverters are developed with simple auxiliary circuits. Unlike most existing three-phase soft-switching techniques, these new topologies achieve soft-switching functions without overcharging the resonant …
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Optimal vertical plane booster guidance including pitch dynamics
… The three-phase zero-voltage transition (ZVT) boost rectifiers/voltage source inverters are developed with simple auxiliary circuits. Unlike most existing three-phase soft-switching techniques, these new topologies achieve soft-switching functions without overcharging the resonant …
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Novel zero-voltage switching techniques for pulse-width-modulated converters
… PWM converters and zero-voltage-transition (ZVT) PWM converters, are proposed. The proposed ZVS-PWM converters combine the merits of conventional PWM and ZVS-QRC techniques. They are capable of regulating the output for a wide load and input voltage range while maintaining constant-frequency …
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Development of a power electronics for a flywheel energy storage system
… 1 ~O-kHz switching frequency by the innovative ZVT soft-switched three-phase inverter/rectifier.
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Driver Based Soft Switch for Pulse-Width-Modulated Power Converters
… proposed. The proposed zero-voltage-transition (ZVT) cell serves as a good candidate for the development of soft switch. The "Equivalent Inductor" and state plane based analysis method are used to simply the analysis of coupled inductor based zero-voltage switching scheme. With the proposed …
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High Power Inverter EMI Characterization and Improvement by Auxiliary Resonant Snubber Inverter
… and limitation of the EMI reduction of the ZVT-RSI are also discussed and concluded. The control interface circuit and gate driver design are described in the appendix. The implementation of variable charging time control of the resonant inductor current is also explained in the appendix.
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Analysis and Evaluation of Soft-switching Inverter Techniques in Electric Vehicle Applications
… inverters realizing the zero-voltage-transition (ZVT) or zero-current-transition (ZCT) operation are identified to achieve high efficiency operation. Then one hard-switching inverter and the chosen soft-switching inverters are designed and implemented with the 55 kW power rating for the small duty …
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Design and implementation of a universal onboard battery fast charger for transportation electrification applications
… circuit provides the zero voltage transition (ZVT) and zero current transition (ZCT) of the boost switch and the remaining components are also soft switched. The detailed timing waveforms of converter operation is presented. The peak efficiency of 97.4% is observed on a 1.0 kW proof-of-concept …