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本文提出一种改进型电流换相桥式逆变电路,它和原McMurray电流换相电路比较,具有下列优点:(1)所用的晶闸管数要少,(2)能够回收换相能量,(3)简化了控制极触发脉冲的逻辑电路。此外,本文从逆变器的整体出发,并考虑到磁化电流的存在,以及换相电感间耦合系数K<1的实际情况,分析逆变器的换相过程,从而导出一组最优化换相参数计算公式。
This paper presents an improved current commutation bridge inverter circuit, which is compared with the original McMurray current commutation circuit, has the following advantages: (1) the number of thyristors used is less, (2) can recover commutation energy, (3 ) Simplifies the logic of the gate trigger pulse. In addition, based on the whole inverter and considering the existence of magnetizing current and the coupling coefficient K <1 between commutation inductors, this paper analyzes inverter commutation process and derives a set of optimal commutation Parameter calculation formula.