The traction inverter provides VVVF three-phase ac voltage for traction motors.
牵引逆变器为牵引电机提供三相变频、变压的交流电。
The shift trigger pulse of the thyristor trigger circuit with integration amplifier is generated by comparing directly principle of three-phase AC and shift-phase control voltage.
该晶闸管触发器采用集成运数放大器，移相触发脉冲的形成是根据三相交流电的各相与移相控制电压直接比较原理实现的。
Subsequently, a novel controller for DC bus voltage regulation is put forward according to the small signal model based on the instantaneous power balance in AC and DC sides of three-phase SAPF.
然后根据交流侧和直流侧的功率平衡方程，推导了电压环的小信号模型。最后基于该模型设计了一种高动态性能的直流电压调节器。
Voltage unbalance of three phase ac distribution systems adversely affects power customers.
配电系统三相电压的不对称会对用户造成一系列不利影响。
The resulting voltage produced is sinusoidal or AC that can be configured to three-phase power usable with the national power grid.
产生的电压产生的正弦或交流，可以配置为三相电源与国家电网使用。
It consists of three-phase or single-phase AC voltage by the step-down and full-wave rectifier (or rectifier bridge) has been, no regulator and ping-wave large enough to require power.
它由三相或单相交流电压经降压和全波整流(或桥式整流)得到，无稳压及平波要求功率要足够大。
The simulation and experimental results show that this system can restrain harmonics of three-phase rectifier of AC-side input current, reduce the output voltage ripple and decrease the volume.
仿真和实验结果表明该系统能够有效抑制三相整流电路交流侧输入电流的谐波，降低输出电压纹波，减小整机体积。
Voltage detect of three phase AC, the warning of over-voltage, under-voltage, lost phase and power failure, two-way AC circuits switch full-automatically.
三相交流电压检测，过压、欠压、缺相、停电告警，全自动双路交流前换功能；
Apply to indoor 312 kv three-phase ac 50 (60) hz power system in various models and high-voltage switchgear supporting the use, can be as high voltage apparatus equipment maintenance with grounding.
适用于户内312kv三相交流50（60）hz的电力系统内和各型号高压开关柜配套使用，亦可作为高压电器设备检修时接地用。
Apply to indoor 312 kv three-phase ac 50 (60) hz power system in various models and high-voltage switchgear supporting the use, can be as high voltage apparatus equipment maintenance with grounding.
适用于户内312kv三相交流50（60）hz的电力系统内和各型号高压开关柜配套使用，亦可作为高压电器设备检修时接地用。
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