Working principle of motor governor

The synchronous speed can be changed by changing the number of stator poles of multi-speed motor, and the variable frequency speed regulation can be changed by changing the stator voltage and frequency through the speed regulation of commutation motor.

Mainly divided into the following categories:

1, pole-changing speed regulation:

Changing the connection mode of the motor stator winding can change the number of poles of the motor, so as to realize the step-by-step change of synchronous speed and the step-by-step adjustment of motor speed.

2, variable frequency speed regulation:

Changing the frequency of input power at the stator end of asynchronous motor to make it continuously adjustable to change its synchronous speed, the method to realize motor speed regulation is called variable frequency speed regulation.

3, electromagnetic speed regulation:

The method of realizing speed regulation by electromagnetic slip clutch is called electromagnetic speed regulation.

Extended data

Maintenance mode of motor governor:

1. Remove the protective shell and check the contact surface for dirt and burns. If there is dirt, clean paper can be used to wipe the contact surface. If the contact is ablated or uneven, resulting in poor contact, it is generally polished with "00" sandpaper or abrasive belt, and finally wiped with clean paper.

2. Check the firmness of each joint and measure the resistance and resistance value of each coil. If it is damaged, it should be repaired or replaced with a new one in time.

3. Check the closing voltage and reverse current of the circuit breaker, the limit voltage of the economizer, the limit current of the throttle, and the gaps and air gaps of various contacts. Do not meet the requirements, to adjust.

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