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。
A three phase full resonant cyclo-converter suitable for converting a three phase AC supply to a DC output.
一种适用于将三相ac电源转换为DC输出的三相全谐振环形转换器。
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；
The thesis introduces a three phase AC motor's mathematical model in static reference frame and a simulation system for AC motors to develop a vector control inverter system.
针对三相异步电机矢量控制系统的要求，根据在静止坐标系统中异步电机的数学模型，进行了系统仿真。
The characteristic and application conditions of three-phase ac intelligent thyristor power module (ITPM) and load characteristic of klystron are presented.
简要叙述了三相交流晶闸管智能模块(ITPM)的性能特点、应用情况以及速调管的负载特性。
For avoiding the math models of three-phase AC electromotor and frequency inverter, adopt the simple similarity of ascending curve method to ensure the math models of every loop.
为避开三相交流异步电动机和变频器的数学模型，利用飞升曲线法简单近似确定各环节的数学模型。
The principle of pure digital PWM of the three-phase AC motor is analyzed.
分析了三相交流电机全数字脉宽调制的原理。
AC brushless synchronous excitation generator is a rotating-armature synchronous generator, which has a module of three-phase rectification bridge.
无刷交流励磁机为旋转电枢式的同步发电机，旋转整流器为模块式的三相整流桥。
With its high maturity three-phase ac drive technology has become the standard for practically all new vehicles.
交流电传动技术的不断成熟，使其真正成为所有新机车动车的标准。
The broad application of AC three - phase asynchronous motor has put higher requirements to the starting of motors.
交流三相异步电动机的广泛使用，对电动机的启动提出了越来越高的要求。
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。
They provide system security and immediate reliable low level ground fault detection on three-phase AC resistance grounded or grounded electrical distribution systems.
此类继电器能够增加系统安全性，并对三相交流接地电阻或接地配电系统进行可靠的低级接地故障检测。
A high-power hand-operated three-phase AC generator includes a handle, a handle fixed plate, a driven gear, a press mounting gear, and a generator box body.
一种大功率手摇三相交流发电机，其包括一手把、一手把固定板、一从动齿轮、一压装齿轮、一发电机箱体。
Electrical products which have LCD time counter, Layer sensor, Three-phase AC fault protection relay and so on.
其中电器类产品有液晶显示计时计数器、平层感应器、断相错相三相交流保护继电器等等。
This paper presented a thyristor controlled single-phase to three-phase converter suitable for driving an induction motor with a single-phase AC supply.
提出一种单相电源供电时适用于异步电机传动的单相–三相变换器。
A generator system that includes a three-phase ac machine and an active rectifier bridge employing low on-resistance MOSFET switches for converting the ac current from the machine to a DC current.
高效发电机。一种发电机系统包括三相ac电机和应用低导通电阻MOSFET开关的有源整流器电桥，用于将来自电机的AC电流转换为DC电流。
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。
Research on the zero-current-breaking control (ZCBC) for intelligent ac contactor and realize the micro-arc-energy breaking control in three-phase circuit.
进行智能交流接触器零电流分断的研究，并实现了三相电路的微电弧能量分断控制。
In order to solve the requirement of high precision equal phase in three-phase AC power supply, one AC power supply is designed based the traditional DDS technology.
针对某设备所需的三相电源相位精度要求高的特点，在传统DDS技术的基础之上，设计了一款高度对称的三相电源。
For three-phase asynchronous motor AC speed-adjustment system, this paper lays a strong emphasis on study of asynchronous motor AC speed-adjustment system consisted of dual-PWM converters.
针对三相异步电机交流调速系统，重点对由双端PW M变流器组成的异步电机的交流调速系统进行了研究。
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。
Three-phase synchronous generators are used for supplying simultaneous AC and rectified DC loads in ships.
在舰船上可利用三相同步发电机同时向交流负载和直流负载供电。
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。
This is the three-phase AC induction motor vector control procedures.
这是三相交流异步电动机矢量控制程序。
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 three-phase AC self-regulating speed motor do not use high-power electron device, has non exterior additional speed-regulating equipment and does not bring pollution.
三相交流自调速电动机不使用大功率电子器件，也没有外部附加的调速设备，不产生污染电网的谐波。
The three-phase AC self-regulating speed motor do not use high-power electron device, has non exterior additional speed-regulating equipment and does not bring pollution.
三相交流自调速电动机不使用大功率电子器件，也没有外部附加的调速设备，不产生污染电网的谐波。
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