How to control ac motor speed
How the motor is controlled: Motor control refers to the control of the start, acceleration, operation, deceleration and stop of the motor. Depending on the type of motor and the use of motor, there are different requirements and purposes. For motor, it is controlled by motor, which is the purpose of fast starting, quick response, high efficiency, high torque output and high overload capability. Three phase asynchronous motor start-up methods include: Full voltage direct start, voltage drop start, increase rotor circuit resistance start. For the reduction of pressure, the main factors include: auto-transformer start, star delta change start, voltage change start. When the asynchronous motor starts, the rotor is at rest, its slip ratio s = 1. At this point, the rotor side of the t-type equivalent circuit is very low, so the starting current is large and the starting current can be reduced by lowering the voltage. Since the starting torque of the asynchronous motor is proportional to the voltage square, it is necessary to make sure that the motor has a certain starting capacity
The speed of the ac motor is dependent on the frequency of the power supply.This...... Nothing, change the current or the resistance.
The ha-inverter and the rest are not economical at your speed The best way to do this is to add a gearbox
Ac motor is synchronous and asynchronous. The synchronous motor is at the same speed as n = 60f1 / p; If the speed adjustment words can only be tuned. The speed of asynchronous motors is n = 60f1 (1-s)/p; There are three ways to speed adjustment: A. Variable pole (p) speed adjustment. 2. Frequency conversion (f1) speed adjustment. 3. Change the differential rate s speed adjustment. There are four different kinds of changes: This is the variable stator voltage. The rotor resistance of a winding asynchronous motor is adjusted. The electromagnetic clutch speed adjustment. The double feed speed and cascade speed control of the wire wound asynchronous motor.
