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 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。
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。
A kind of medium voltage AC variable frequency control system, which consists of voltage source inverter, sinuous filter and stepup transformer with variable frequency, is introduced.
介绍一种采用低压电压型变频器、正弦波滤波器和变频升压变压器构成的低-高式中压变频控制系统。
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 online variable step can also regulate the voltage convergence rate, and the phase-locked control circuit is designed to synchronously trace frequency and phase of power grid automatically.
在线调节步长改变电压收敛速度，设计锁相控制电路，自动同步跟踪电网频率和相位。
Control achieved by applying straight voltage between 0 and 24 VDC via potentiometer or other variable power supply.
控制应用和实现连续24伏直流电源电压介于0通过电位器或其他变量的权力。
It sets the voltage feedback parameter directly according to the regulation precision for steady state while realizes the multi-variable coordinated optimization control.
既根据稳态调节精度的要求设定电压反馈系数，又实现了多变量协调优化控制。
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 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。
This PFC was realized by employing sliding-mode variable-structure inner current loop control and outer voltage loop PI control with digital low-pass filter to achieve high performance.
提出了采用滑模变结构电流内环与由PI调节器和数字低通滤波器组成的电压外环相结合的控制系统，以实现高性能高速度的功率因数校正。
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；
Being a simple and reliable speed control system for AC inductive motors, the device features better performance than AC variable voltage speed control system does.
本装置的性能优于交流调压调速系统，是一种简单而可靠的交流绕线式电动机转速控制系统。
The direct-axis or quadrature-axis stator voltage is used as manipulated variable and direct-axis or quadrature-axis stator current delay feedback is used for chaos control.
该方法以永磁同步电动机的定子交轴电压或直轴电压为控制量，利用电流的延迟反馈实现了混沌运动的控制。
Three phase voltage PWM rectifier based on current variable-structure control is studied and mathematic mode of PWM rectifier is analyzed in this paper.
对三相电压型PWM整流器采用电流变结构控制进行了研究，分析了PWM整流器的数学模型，详细设计了电流变结构控制器，并对其稳定性进行了分析。
Variable voltage and variable frequency system based on vector control is applied widely in high speed train.
基于矢量控制的变压变频调速在高速列车中得到广泛应用。
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。
Shanghai Electric Appliance co., Ltd. is the production of variable transformers and control devices, isolation transformers, voltage regulator, volta.
电器配件；电力变压器。电动机。电焊机。仪上海华变电器有限公司。
Shanghai Electric Appliance co., Ltd. is the production of variable transformers and control devices, isolation transformers, voltage regulator, volta.
电器配件；电力变压器。电动机。电焊机。仪上海华变电器有限公司。
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