How To Increase The Power Of A DC Motor？

Micro DC motors are commonly used in various electric products. Micro motors are low-power motors. How to improve the power of existing low-power micro DC motors?

For micro DC motors that can run for a long time, the output power is generally not the maximum power, and the rated power is usually half of the maximum power. The main reason is that when the micro DC motor is energized and operated, the windings will heat up and the temperature will rise. When the temperature rise exceeds the insulation When the temperature of the material is high, the insulating material will fail and the motor will burn out. In order not to make the temperature of the micro DC motor too high, the micro motor needs to reduce the power to run, and cannot run at the maximum power state. In addition to the rated power, the voltage, current, ambient temperature, and heat dissipation methods are all to ensure that the temperature of the micro DC motor does not exceed the standard.

Generally, the power is increased by modifying the motor or changing the ventilation and heat dissipation method. Micromotors with higher power usually need to increase the iron core, increase the winding cross-sectional area or increase the voltage to increase the number of winding turns. The larger the power of the DC motor, the larger the volume will be. big. The power can be effectively increased by appropriately increasing the winding area.

As long as the control temperature does not exceed the standard, it is feasible to appropriately increase the power of the micro DC motor. For example, if the temperature of the working environment is lowered, some power can be increased to operate in a low temperature environment. The second is to change the heat dissipation method of the micro motor. Generally, the micro DC motor is naturally cooled, and can be changed to ventilation cooling. If the micro motor shell has ventilation cooling, it can be changed to internal ventilation cooling, which can increase the power of the micro DC motor. operation, and ensure that the temperature does not exceed the standard. By installing a cooling fan on the carbon brush end of the micro DC motor, the wind blows into the micro DC motor and comes out from the other end of the micro motor (because the carbon brush and the commutator are the main heating parts of the DC motor, so the air enters from this end.)

The above is the method to increase the power of the micro DC motor. There are two aspects to increase the power of the micro DC motor. One is to increase the input voltage, and the other is to reduce the input current of the motor impedance. For the micro DC motor, both voltage and current have rated values. Therefore, the increase of the power of the micro DC motor must be based on the upper limit of the rated value, and the excess will cause the micro DC motor to be overloaded. Generally, it is not recommended to operate under the rated power value for a long time.