The attention when using Permanent magnet DC motor

Permanent magnet DC motor in the usual use of the process should pay attention to these issues

(1) If the product is not specified, under normal circumstances (such as aluminum-nickel-cobalt permanent magnet DC motor or ferrite permanent magnet DC motor) permanent magnet DC motor are not allowed at rated voltage reverse brake operation, otherwise it will cause Permanent magnet demagnetization; if it is necessary to do this way to run, to increase the current limiting resistor to limit the current is too large.

(2) according to the following steps on the motor to conduct a preliminary check:  First check the appearance of the motor: should be no scratches, bumps and coating off; and then turn the shaft, should be able to flexible rotation, no obvious card shell phenomenon. Check that the motor wiring is secure and energized. The motor in the rotation process should not exist friction, which is the most prominent bearing friction. Bearing wear will be issued after the abnormal sound, the phenomenon of local overheating temperature rise.

(3) pay attention to the motor due to excessive current, temperature changes and disassembly of the magnetic circuit caused by the demolition of the permanent magnet demagnetization, especially for aluminum nickel cobalt permanent magnet motor, the demolition of the permanent magnetic circuit magnetic short circuit protection, otherwise After demagnetization to another magnetizing.