In order to implement an energy-saving method which keeps iron loss equal to copper loss using variable-voltage in light load, induction motor parameter identification at any moment is a key problem.
对于轻载调压使铜损等于铁损的这一节能方法而言，在线辨识出电机的参数是一个关键点。
The result of simulation shows that the proposed variable structure controller can improve dynamic characteristics of system more effectively in contrast to conventional voltage controller of SVC.
仿真结果表明：与常规电压型SVC控制器相比，SVC变结构控制器能有效地改善系统的动态特性。
The power supply voltage may be controlled by replacing D1, D2, R1 and R2 with a variable voltage reference.
将D 1、D 2、R1和R2换成一个可变参考电压源，本电路就变成了一个可控电源。
A variable structure controller for Static var Compensator (SVC) which can improve power Angle stability of power system and local voltage characteristics of SVC is proposed.
本文提出了能同时改善电力系统功角稳定和装设点电压动态特性的用于静止无功补偿器(svc)的变结构控制器设计方法。
Pulse current, arc polarity, arc voltage and metal transfer of variable polarity pulse MIG welding are controlled by 80c196kc coordinately to implement the stable welding procedure.
单片机协调控制变极性脉冲MIG焊的脉冲电流及电弧极性、电弧电压及熔滴过渡频率，实现了稳定的焊接过程。
This paper applies a method of linear continuous variable feedback to the control of a kind of voltage collapses induced by reactive power changes, which only USES a single variable to feed back.
应用连续变量线性反馈对一类由负荷无功功率变化引起的电压崩溃进行控制，仅用单个变量即可实现。
The main flux of asynchronous motor varies with the power voltage and the para-meter of excited inductance becomes a variable.
电源电压变化时，异步电动机主磁通随之变化，与之相应的激磁电感参数将是一个变数。
This article introduces the principle, advantage, main problems and practicability of the high voltage high capacity variable speed drives abroad, in the meantime, its application is explained.
本文介绍了国外高压大容量变频器的原理、优缺点及实用性，并介绍了应用情况。
According as compare of voltage deviation and its variable ratio, optimal control of voltage and current is realized with querying fuzzy control sheet and adjusting adverse variable pulse width.
比较电压偏差及其变化率，查询模糊控制表，调节逆变脉宽，可实现电压及电流的理想控制。
The AC-DCAC voltage source inverter composes the main circuit of this variable frequency system and CPLD is the logic control device of the power device (IPM).
该变频调速系统主电路采用交-直-交形式，以(CPLD)作为调速系统逆变电路功率开关器件(IPM)的逻辑控制器件。
The outer one adopts conventional PI control algorithm and takes the capacitor voltage as the controlled variable.
外环则采用PI控制算法，以电容电压为被控量。
The outer loop of the cascade controller adopts conventional PI control algorithm and takes the capacitor voltage as the controlled variable;
控制器的外环采用PI控制算法，以电容电压为被控量；
A high voltage gating switch of variable delay for photomultiplier tube has been fabricated.
介绍了一种用于光电倍增管的可变延迟高压门控开关电路。
This paper analyzes the phase selection theories of sequence current, the current break variable and the compensation voltage.
分析了反映序电流、电流突变量和补偿电压的选相原理，提出了当电压互感器断线时为防止误动应闭锁补偿电压选相。
Then this paper chooses the suitable variable to design the voltage and current double closed-loop controller, which has well stability and fast transient response.
对电源系统进行分析，选择合适变量设计一个稳定性好、动态响应快的电压电流双闭环控制。
Cascade multilevel inverter has extensive application in the high voltage variable frequency modulated Speed System for its numerous advantages.
级联式多电平逆变器因其具有众多的优点，在高压变频调速领域中得到广泛应用。
The high voltage variable frequency transformation of power plant's pump system of condensation water pump, condensation water booster pump is described briefly.
对发电厂的凝泵、凝升泵的高压变频改造进行了简要叙述，并对经济性试验的数据进行了定量分析。
For this project ABB Italy and ABB South Korea will supply low voltage switchgear, intelligent motor control units and variable frequency drives.
ABB意大利公司和ABB韩国公司将为这个项目提供低压开关柜，智能电机控制单元，以及变频器。
The high voltage variable frequency speed regulation is the best energy conservation way at present.
指出目前应用高压变频技术是离心风机最佳的节能途径。
Variable voltage processors, if used properly in designing real-time embedded systems, can dramatically reduce system energy consumption.
在设计实时嵌入式系统时，如果能够善于利用可变电压处理器，可以极大减少系统的能耗。
During actual operation of electric motor, the electric current is generally variable by the changes of the load and the main voltage, so, the electric motor equilibrium temperature is also variable.
电动机实际运行时，电流一般是随负载和电网电压的改变而变化的，因此，电动机稳定温度也是变化的。
By adjustment to control signal, systems might realize variable voltage, variable frequency, steady voltage, steady frequency closed loop control.
通过对控制信号的调整，系统可实现变压、变频、稳压、稳频的闭环控制。
The variable voltage variable frequency(VVVF) control of 3-phase induction motor for driving trolleybuses is expounded.
介绍无轨电车采用变压变频控制的三相感应电动机驱动技术。
Abstract: This paper introduces a voltage-variable and frequency-variable high voltage power supply using IPM. The operation principle is discussed in detail.
摘要：介绍了一种采用智能功率模块的调压调频高压电源，详述了其工作原理。
In this issue, a device of variable velocity variable frequency on medium-high voltage three-level is developed to reduce energy consumption and improve the cost-effective for the previous problems.
针对这些问题，本课题研究开发了一种中高压三电平变频调速装置，降低电机的能耗、提高系统的性价比。
The medium voltage variable-frequency controller is developed for the variable-frequency against the existing problem during application of submersible pump.
潜油电泵中压变频控制器是针对潜油电泵在应用中存在的问题而研制开发的变频调速控制装置。
The medium voltage variable-frequency controller is developed for the variable-frequency against the existing problem during application of submersible pump.
潜油电泵中压变频控制器是针对潜油电泵在应用中存在的问题而研制开发的变频调速控制装置。
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