Why Does The Motor Heat Up?

The direct cause of the heating of the micro motor is caused by excessive current (of course there are other factors such as long-term operation or the environment). The value of the temperature of the micro motor higher than the ambient temperature is called the temperature rise. Once there is a temperature rise, the micro motor will dissipate heat to the surroundings. The higher the temperature, the faster the heat dissipation. When the heat emitted by the micro motor is equal to the heat dissipated When the temperature around the micro-motor does not increase, but maintains a stable and constant temperature, that is, it is in a state of balance between heat generation and heat dissipation.

Here are some reasons why the temperature of the micro motor is too high and how to deal with it.

  1. If the voltage of the micro motor is too high (more than 10% of the rated voltage) or the instantaneous voltage is too low (more than 5% below the rated voltage), the micro motor will heat up under the rated load.

Treatment method: Just check and adjust the voltage.

  2. The unbalanced three-phase power supply voltage of the micro motor will also cause the motor to heat up (the unbalance degree exceeding 5% will cause the three-phase current to be unbalanced).

Treatment method: Check and adjust the voltage to solve.

  3. The contact of the power switch or the open circuit of the one-phase fuse will cause the lack of phase operation, and will also cause the temperature of the micro motor to rise;

Treatment method: It can be solved by repairing and replacing the damaged parts;

  4. Wrong wiring of micro motor windings will make the micro motor running under rated load heat up;

Treatment method: correct the wiring error of the winding;

  5. The bearing of the micro motor is seriously worn, which will generate a large amount of frictional heat. This situation indicates that the life of the micro motor has reached its limit;

Treatment method: replace the motor;

  6. If the load of the micro motor is too large, heat will also occur;

Processing method: need to reduce the load;

  7. Too frequent starting of the micro motor and high ambient temperature will also cause the motor to overheat.

Treatment method: reduce the number of starts, and a good heat dissipation environment can effectively solve similar overheating problems;

In the application process of miniature motors, as long as the motor does not exceed the rated value, does not start frequently, and has a good heat dissipation system, the motor will basically not have any problems.