一种新型软开关逆变器拓扑

A new topology of soft-switching inverter

提出一种'戽斗电荷转移式'零电流开关(CT-ZCS)功率变换机制,讨论其变换原理及工作波形,通过建立规范化状态轨迹方程和状态轨迹图分析方法,对其工作过程进行理论分析。基于此变换机制所构成的CT-ZCS软开关逆变器新型拓扑,具有瞬态电压跟踪及模拟化输出电压波形效果;输出端耐负载冲激不怕短路;易于多逆变模块N+1冗余并联及功率均衡协调控制;软开关换流益于提高逆变器容量和效率。样机试验结果证实了该拓扑功率变换机制的可行性及瞬态电压跟踪特性。

Bail-charge-transferring zero-current-switching （CT-ZCS） power conversion mechanism was proposed, and its conversion principle and waveform were discussed. Also the operating process was analyzed in theory by means of state trajectory equations and charts generalized. The new topology of CT-ZCS-based soft-switching inverter has several distinct characters： The output voltage can track transient reference voltage and output analogue voltage waveform. Output terminal can bear load shock and short circuit. Both multiple inverter N＋ 1 redundancy parallel and balanced power control become easy. Softswitching commutation is benefit for high efficiency and large capacity. Prototype experimental results confirm the feasibility and dynamic voltage-tracking characteristics of the topology and its power conversion mechanism.