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A variable-frequency drive (VFD, or adjustable-frequency drive, adjustable-speed drive, variable-speed drive, AC drive, micro drive, inverter drive, variable voltage variable frequency drive, or drive) is a type of AC motor drive (system incorporating a motor) that controls speed and torque by varying the frequency of the input electricity.

In industrial terms, AC drive is also called as variable frequency drive (VFD), variable speed drive (VSD), or adjustable speed drive (ASD). Though there are different types of VFDs (or AC drives), all of them are works on same principle that converting fixed incoming voltage and frequency into variable voltage and frequency output.

Control Techniques is a worldwide leader in AC and DC variable speed drives, servos and power conversion technologies. Control Techniques products are used in demanding applications, requiring performance, reliability and energy efficiency.

AC Drives are energy saving electrical devices to change fixed frequency (50 / 60 Hz) to Variable-Voltage Variable-Frequency (VVVF) for AC motor adjustable speed controls, which also called variable frequency drives (VFD), frequency inverter, variable speed drives (VSD) and adjustable frequency drives (AFD) by most of manufacturers in ...

ABB Drives is a global technology leader serving industries, infrastructure and machine builders with world-class variable speed drives, drive systems and packages. We help our customers, partners and equipment manufacturers to improve energy efficiency, asset reliability, productivity, safety and performance.

AC drives provide the most energy efficient means of capacity control. AC drives have the lowest starting current of any starter type. AC drives reduce thermal and mechanical stresses on motors and belts. AC drive installation is as simple as connecting the power supply to the AC drive.

An AC drive is a device used to control the speed of an electrical motor in order to: enhance process control; reduce energy usage and generate energy efficiently; decrease mechanical stress on motor control applications; optimize the operation of …

2025年1月23日 · An AC Drive is an electronic device that converts a fixed frequency and voltage to an adjustable frequency and AC voltage source. It controls the speed, torque, horsepower and direction of an AC motor.

变频器(AC Drive) 所谓的变频器就是电气上将DC (直流)转换为AC (交流)的装置，将常用电源 (AC220V/440V)供给的电力输入到变频器内，改变电压和频率，再供给到电机 (Motor)上，控制电机的速度。