Both magnetic powder brake and magnetic clutch are generated by the hardening of the magnetic powder after the phenomenon of transmission torque, and therefore in the course of the use of small failures is inevitable. Under normal circumstances the most common failures are the following:
　1, there is no torque or torque when the current is small;
　2, there is no power to go with a torque and not flexible;
　3, magnetic powder brake and magnetic clutch surface temperature is too high;
　4, power will be burned after an internal coil. Resulting in the above failure is due to lack of pre-commissioning, magnetic aging damp, the device did not pass quality, bearing damage, brake and clutch capacity is too low, poor quality radiator, not in accordance with the product manual for operation.
　For the above failures and causes, then how should deal with and maintenance? First of all, we must carefully look at the brake and clutch product manual and then follow-up operation, and then test run, after commissioning to carefully check the assembly quality and the quality of magnetic powder, and more is to increase the air flow cooling device.