Buke servo motor - AC motor speed regulation method

Create Date: 2024-8-30 12:03:23|Source: Kinco/Buko

AC motor speed regulation is achieved by changing the electrical parameters such as the power supply frequency, number of pole pairs and slip rate of AC motor.

1. Use the inverter to change the power supply frequency speed regulation, the speed regulation range is large, the stability and smoothness are good, and the mechanical characteristics are hard. That is, with the added rated load, the speed drops less. It belongs to stepless speed regulation. It is suitable for most three-phase squirrel cage asynchronous motors.

2. Changing the magnetic pole logarithmic speed regulation, which belongs to step-by-step speed regulation, has poor smoothness of speed regulation, and is generally used in metal cutting machine tools.

3. Change the slip rate to adjust the speed.

(1) Rotor loop string resistance: used for AC wound asynchronous motor. The speed regulation range is small, the resistance consumes power, and the motor efficiency is low. Generally used for cranes.

(2) Change the power supply voltage speed regulation, the speed regulation range is small, the torque drops greatly with the voltage drop, and the three-phase motor is generally not used. It is used for single-phase motor speed regulation, such as fans.

(3) Cascade speed regulation, the essence is that the rotor introduces additional electromotive force and changes its size to regulate the speed. It is also only used for wound motors, but the efficiency is improved.

(4) Electromagnetic speed regulation. For slip motors only. By changing the current of the excitation coil, the mechanism is simple, but the control power is small. It is not suitable for long-term low-speed operation.
Buke servo motor - AC motor speed regulation method

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