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Improved ZCS-PWM commutation cell for IGBTs application

机译：改进的ZCS-PWM换相单元，用于IGBT应用

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摘要

An improved zero-current-switching pulsewidth-modulated (ZCS-PWM) commutation cell is presented, which is suitable for high-power applications using insulated gate bipolar transistors (IGBTs) as the power switches. It provides ZCS operation for active switches and zero-voltage-switching (ZVS) operation for passive switches. Besides operating at constant frequency and reducing commutation losses, the proposed ZCS-PWM switch cell has no additional current stress and conduction loss in the main switch. To demonstrate the feasibility of the proposed ZCS-PWM commutation cell, it was applied to a boost converter. Operating principle, theoretical analysis, design guidelines, and a design example are described and verified by experiment results obtained from a prototype rated 1 kW and operating at 40 kHz. The PWM switch model and state-space averaging approach is also used to estimate and examine the steady-state and dynamic character of ZCS-PWM boost converter system. Finally, the application of the proposed soft-switching technique in the dc-dc nonisolated converters is presented.
机译：提出了一种改进的零电流开关脉宽调制（ZCS-PWM）换向单元，适用于使用绝缘栅双极晶体管（IGBT）作为电源开关的大功率应用。它为有源开关提供ZCS操作，为无源开关提供零电压开关（ZVS）操作。除了以恒定频率工作并减少换向损耗外，拟议的ZCS-PWM开关单元在主开关中没有额外的电流应力和传导损耗。为了证明所提出的ZCS-PWM换相单元的可行性，将其应用于升压转换器。描述了工作原理，理论分析，设计指南和设计实例，并通过从额定功率为1 kW且工作频率为40 kHz的原型获得的实验结果进行了验证。 PWM开关模型和状态空间平均方法还用于估计和检查ZCS-PWM升压转换器系统的稳态和动态特性。最后，介绍了所提出的软开关技术在dc-dc非隔离式转换器中的应用。

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