It is pointed out that the double single-end positive-excited main inverting circuit produces two different PWM pulses with reverse phase and the parallel connection can utilize one output inductance, but is not suitable for connecting more parallel output circuits; 结果表明,双单端正激逆变电路的两路逆变器发生的可调宽度的脉冲相位相差180°,输出电路并联可共用一个输出电抗器,但不利于并联更多的输出电路;