Synchronous closing is an intelligent control technique. It can make the moving and stationery contact-header of circuit breaker to close on the specified phase angle of the power system voltage wave.
It introduces the principle of voltage inverter, analyzed the reason of distortion of output voltage and current wave form, as it is loaded with hysteresis synchronous motor.
本文介绍电压逆变器的原理，分析带上磁滞同步电动机这一负载后逆变器输出电压电流波形畸变的原因。
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It can provide complete square wave in the transformer, which can provide a simple self-driving method for synchronous rectifier.