Why can't DC drives control the motor speed, where is the general fault?

Dc drive can not control the motor speed may be caused by a variety of reasons, the following are some common causes of failure:

1. Control signal problem: The control signal of the DC drive may be affected by electromagnetic interference or other factors, resulting in the drive to control the motor incorrectly.

2. Feedback signal problem: If the drive can not get accurate feedback signal of the motor, it may lead to uncontrolled motor speed.

3. Motor problems: If the motor itself has faults, such as bad conduction, open winding or switch damage, then the DC drive can not control the motor correctly.

4. Parameter setting problem: If the parameters of the drive are set incorrectly, such as proportional gain, integration time or differential time, it may lead to uncontrolled motor speed.

5. Power problem: If the power required by the motor exceeds the rated power of the drive, it will lead to uncontrolled motor speed.

To sum up, the DC drive can not control the motor speed may be caused by a variety of reasons. Please carefully check the state of the drive and motor and find the cause of the failure. If you are not sure how to solve the problem, you are advised to seek professional help.