无源软开关技术在PWM变换器上应用的性能比较

Contrastive Research on Performances of Passive Soft-Switching Technology Applied to PWM Converters

将无源软开关(PSS)技术应用于DCDCPWM变换器上可以解决硬开关电路的缺陷。应用于DCDCPWM变换器的PSS技术有多种类型。在电感电流连续模式(CCM)的PWM变换器中工作的电力电子器件的开关状态最恶劣,要求PSS技术能使电力电子器件的开通与关断都处于软开关状态。为此,建立了PSS技术的性能评价体系,在大量实验数据的基础上,利用此体系结合理论分析对4种典型的PSS技术进行客观评价,以便于PSS技术的推广和应用。提出的PSS技术性能评价体系是一个具有实际意义、能对电路性能特性进行评价的工具。

Passive soft-switching （PSS） technologies applied to DC-DC converters can solve the defects coming from hard switching. Many PSS technologies have been proposed. The states of power electronic devices in PWM converters which operated in current continuous mode （CCM） are most severe. It requests that the PSS technology makes the power electronic devices turned-on or turned-off in soft-switching condition. A system of performance evaluation for PSS technologies, which can carry on an objective evaluation to the existing typical PSS technologies combining with theoretical analyses based on massive experimental data in order to be advantageous for extended application was established. The system of performance evaluation for PSS technologies presented here is a univocal tool practically with judge of performance for circuits.