主电路以反并联的晶闸管作为控制开关，控制焊接用的电阻点焊变压器通电与否。
In the main circuit, the inverse parallel couple SCRs (silicon-controlled rectifier) are used as a electric switch, switching the transformer of resistance spot welding.
对一起370MVA主变压器分接开关损坏的原因进行了分析，介绍了处理经过，提出了反事故技术措施。
The Tapping switch damaged of a main transformer which power is 370MVA was analyzed, the handling process the measure of preventing accident were provided.
对于开关补偿电源的主电路部分，特别是变压器设计、PWM控制芯片选择、以及工作原理进行了详细的阐述。
As for the main part of switching power, in particular, more detail in the transformer design, PWM controller selection, and working theory.
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