In the process of using the DC brushless motor, the speed may change, but if the motor speed is obviously abnormal and slow, it should be adjusted in time. Because the speed becomes slower, it will be weak, and it will also affect the subsequent equipment application. So why is there a problem of slowing down the speed? How to solve such problems?

Mechanical Problems

If the speed is slow, turn off the power first, then manually turn the rotor shaft or the pulley to see if the rotation is normal and whether there is any inflexibility. Generally, inflexibility will cause the speed to slow down. You can remove the belt first, and then check the bearing, stator and rotor clearance of the DC brushless motor. Generally, it only needs to be adjusted to restore the normal use of the motor.

However, if the motor itself rotates flexibly and is tested without load, you can determine whether the motor is still rotating slowly, prone to heat, etc. If there is no problem in this area, it proves that there is no problem with the mechanical parts. Afterwards, check the circuit, power supply, etc., and it may not be the fault of the mechanical parts. It is necessary to determine the balance of the three phases. If one phase is too high, it means that there is a problem. If there is nothing, it means that there is a lack of phases. The motor should be adjusted according to the situation.

The Winding Of The Motor Itself

This kind of problem is also very common. Use a multimeter to check the ohm range of the DC brushless motor to determine whether the resistance of the three-phase winding of the motor is balanced. If the difference is obvious, it proves to be abnormal. Whereas if all three windings are linked, there is no loss of connection. A thorough inspection is necessary to determine the problem.

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