AC motor is one of the common motors in industrial production, and it usually needs to change the direction of rotation during use. This article will detail how an AC motor changes direction and what to look out for.
 
1. The principle of changing the steering direction of the AC motor
 
The steering of the AC motor is realized by changing the relative position inside the motor, so changing the steering requires changing the relative position inside the motor. There are two common ways to change the steering: changing the phase sequence of the power supply and changing the phase sequence of the motor winding.
 
2. How to change the phase sequence of the power supply
 
Changing the phase sequence of the power supply is an easy way to change the direction of rotation of an AC motor. Specific steps are as follows
 
(1) Connect the motor to the power supply first, and observe the steering direction of the motor.
 
(2) Exchange the two AC power lines in the power supply, and observe the steering direction of the motor again.
 
(3) If the steering direction of the motor is opposite to the original, it means the steering is successful.
 
It should be noted that the method of changing the phase sequence of the power supply is only applicable to three-phase motors, and can only change the forward and reverse direction of the motor, but cannot change the speed of the motor.
 
3. The method of changing the phase sequence of the motor winding
 
Changing the phase sequence of the motor windings is a common method of changing the direction of rotation of an AC motor. Specific steps are as follows
 
(1) Connect the motor to the power supply first, and observe the steering direction of the motor.
 
(2) Exchange the two wires of one of the two windings of the motor, and observe the steering direction of the motor again.
 
(3) If the steering direction of the motor is opposite to the original, it means the steering is successful.
 
It should be noted that the method of changing the phase sequence of the motor winding is applicable to single-phase motors and three-phase motors, but after changing the phase sequence of the windings, the speed of the motor will also change accordingly.
 
4. Precautions
 
(1) Before changing the direction of the motor, it is necessary to stop the motor and cut off the power supply.
 
(2) When changing the rotation direction of the motor, it is necessary to pay attention to the wiring sequence of the power line to avoid damage or danger inside the motor.
 
(3) After changing the phase sequence of the motor winding, the speed of the motor may change, which needs to be adjusted according to actual needs.