AC speed regulator is a device used to control the speed and torque of AC motors, widely used in industrial production and power systems.
1、 Basic Overview
Definition: The AC speed controller achieves precise control of motor speed and torque by changing parameters such as frequency or voltage of the electricity input to the AC motor.
Type: AC speed regulators are mainly divided into two types: voltage regulators and frequency converters. The voltage regulator mainly adjusts the speed by changing the input voltage of the motor, while the frequency converter changes the speed by changing the frequency of the AC power input to the motor.
2、 Working principle
The working principle of an AC speed controller is based on the relationship between motor speed and input power frequency. When the frequency of the power input to the AC motor changes, the speed of the motor will also change accordingly. Specifically, as the frequency increases, the speed of the motor will also increase; On the contrary, when the frequency decreases, the speed of the motor will decrease. The frequency converter achieves precise adjustment of the input motor power frequency by controlling the switching state of power electronic devices (such as IGBT) in the inverter circuit, thus achieving the purpose of speed regulation.
3、 Components
Taking a frequency converter as an example, it usually consists of three main parts: rectifier, inverter, and control circuit:
Rectifiers: convert input AC power into DC power.
Inverter: Convert DC power back into AC power with adjustable frequency, and supply it to the motor.
Control circuit: responsible for receiving speed control instructions and controlling the switching status of power electronic devices in the inverter circuit to achieve precise speed control.
4、 Application Fields
AC speed controllers have a wide range of applications in industrial production, including but not limited to the following aspects:
Mechanical manufacturing: applied to the drive and control of various machine tools such as milling machines, drilling machines, lathes, etc.
Metallurgical industry: used for motor control in production processes such as steel smelting and rolling.
Petrochemical industry: Used for speed control of equipment such as pumps and fans in the processes of oil extraction, refining, and chemical production.
Power system: Used for speed regulation and power control of equipment such as generators and transformers in the process of power transmission and distribution.
English
Russian
Spanish
Italian
Arabic
Korean
German
Japanese
Vietnamese
Turkish
Introduction
Specification Table
Download
