通过简单分析该主电路的结构形式和工作原理，证明它是一种对电网污染少、整流输出电压特性好的焊接电源主电路形式。
By analyzing its structure and working principle, it proves that the new circuit has little pollution to the network and has well characteristic of the output voltage.
任何阴极射线管都储存有三百伏电压，所以先要用一把强力螺丝起子来对付主电容器。
A cathode ray tube can hold 300 volts of passive electrical storage, so use a hefty screwdriver across the main power supply capacitor, first.
给出了正弦波逆变器的主电路结构，分析了控制电路及电压前馈的工作原理。
The structure of the sine wave inverter is given, the working principles of the control circuit and voltage feedforward are analyzed.
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