VVVF

According to the control strategy of AC motors , the two control means put forward to be applicable to electric vehicle about VVVF and space vector .

依据交流电机的控制策略，提出了适用于电动汽车交流电动机控制的变频变压调速和矢量控制两种控制的实现方法。

Control rule which was decided by switch angles which were gained by the selective harmonic elimination technology might eliminate more low order harmonics by lower switch frequency , which made VVVF timing systems output excellent sine wave .

由特定消谐技术得到的开关角所确定的控制规律可以用较低的开关频率消除较多的低次谐波，使变压变频调速系统输出高质量的正弦波。

Application research of VVVF technology to hydraulic speed control system

VVVF技术在液压调速系统中的应用研究

The VVVF System Controlled by a New Type of PWM Method

采用新型PWM控制的变频调速系统

Application of VVVF Technique in Heating Network and Energy Saving Analysis

热网变频调速技术的应用及节能分析

VVVF technique is the key technique for intelligent pumping system .

变频调速技术是智能化抽油系统的关键技术。

VVVF are the main mode of asynchronous motor speed control system .

变频调速是异步电动机调速的主要方式，异步电动机变频调速系统的研究也受到了广大研究人员的重视。

Research on speed control system of VVVF hydraulic elevator with energy feedback

能量回馈式VVVF液压电梯速度控制系统研究

The Constant Pressure Supply Water Control System Realized by PLC and VVVF

用PC、VVVF实现的恒压变量供水控制系统

The study on vector - controlled VVVF system of induction motor

感应电动机变频调速矢量控制系统的研究

Research on the Drive System and VVVF Control Technology of the Large Dynamic Sculpture

大型动态雕塑驱动系统和变频调速控制技术研究

The paper introduces the VVVF control method for single phase capacitor motor .

介绍单相电容电机变频调速的控制方法。

The Study on Power Analyzer For VVVF Adjustable Speed System

变频调速系统功率分析仪的研究

Control Principle and Control System of VVVF Lift

VVVF电梯控制原理与控制系统

Application of VVVF and PLC in the constant voltage variable supply water control system

交流变频调速器在恒压变量供水控制系统中的应用

Application of 16 - Bit Single Chip Microcomputer Based VVVF System in Motor Control

16位单片机VVVF系统在电机控制中的应用

A Novel Method of VVVF Based on Two-Variable Control Theory

基于双变量控制原理的变压变频新方法

Research of Asymmetrical Space Vector Method VVVF for Single Phase Induction Motor

交流单相感应电动机非对称空间矢量变频调速的研究

The Application of VVVF Inverter in the Improvement of Elevator System

VVVF变频器在电梯系统改造中的应用

Application of AC VVVF Technology into the Main Drive of the Mill

交流变频调速技术在轧机主传动装置中的应用

Study on Development of High Voltage Cascaded VVVF Power Unit Monitoring and Control Circuits

级联高压变频器功率单元测控电路开发与研究

Research on VVVF elevator speed control based on absolute surplus distant

VVVF电梯的绝对剩余距离的速度控制研究

A Study of Optimal Control Law for VVVF Inverter

VVVF逆变器最优控制规律的研究

Selection of the Drive Ratio for VVVF 's Drive System

变频调速系统中传动比的选择

Application of PROFIBUS Communication Protocol on VVVF System of Spinning Production Line

PROFIBUS通讯协议在纺丝线变频调速系统上的应用

A Kind of Multifunctional VVVF Constant Pressure Water Supply System with Microprocessor Control

一种多功能变频恒压供水单片机控制系统

The application of VVVF in the liquid level control of lubricating tank

变频技术在调和油罐液位控制中的应用研究

A VVVF Control System for AC Servo Drive of NC Machine Tool

数控机床交流伺服变频调速控制系统

Design of Centralized Conditioning VVVF Control System Based on PLC and Touch Screen

基于PLC与触摸屏的中央空调变频调速监控系统设计

A Slip Frequency Controlled VVVF System With Fuzzy Logic Controller

采用模糊控制的转差频率控制变频调速系统