文章还分析了再生制动时主变流器的换相过程，并对跳弓拉弧时引起再生颠覆的原因也作了说明。
The main converter commutation process due to regenerative braking is also analyzed, and reasons of regenerative overturn caused by pantograph ju…
阐述了“中原之星”号交流传动电动车组主变流器传动控制单元的系统特点，并对其硬件功能和软件功能做了详细的介绍。
The system characteristics of main converter drive control unit of Central China Star AC drive EMUs is described. Thehardware and software functions are introduced in details.
本文介绍了8k型电力机车辅助变流器的特点、主电路元件参数及控制。
It is introduced here the characteristics, the parameters of the power circuit devices and the control method of the auxiliary converter of 8k electric locomotive.
在系统结构的实现上，该装置的主电路采用基于IGBT的智能模块IPM构成三相桥三电平变流器；
On the structure of system, the three-level converter of three phase bridge of the equipment in main circuit is built with IPM module based on IGBT, and its controller is made up of double CPU.
和磁开关不同，该变流器在主反馈输出上没有最小输出负载的要求，从而电路可以达到更高的效率。
Without the minimum output power requirement in the main output just as magnetic amplifier, higher efficiency can be achieved in this circuit.
SVG主电路结构是基于PWM变流器的拓扑结构，PWM交流器可以在四象限运行，所以SVG亦可在四象限运行，从而达到为系统提供无功功率的目的。
The main circuit configuration of SVG is based on topology configuration of PWM 4-quadrant converter, AC current of PWM converter can work in 4-quadrant, so do SVG.
SVG主电路结构是基于PWM变流器的拓扑结构，PWM交流器可以在四象限运行，所以SVG亦可在四象限运行，从而达到为系统提供无功功率的目的。
The main circuit configuration of SVG is based on topology configuration of PWM 4-quadrant converter, AC current of PWM converter can work in 4-quadrant, so do SVG.
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