How to improve the working efficiency of micro DC gear motors?

Micro DC gear motors are commonly used in various high-torque products. So, how can the working efficiency of micro DC gear motors be improved? Below, WKX MOTOR provides a brief introduction to micro DC gear motors.

The working efficiency of micro DC gear motors is determined during the initial selection process. For example, planetary gear motors have higher efficiency than other types of gear reducers, and coreless motors are more efficient than standard micro motors. Improving the efficiency of micro DC gear motors involves reducing losses. Losses in micro DC motors are categorized into mechanical losses and electromagnetic losses. When current passes through the stator and rotor windings, copper losses and iron losses occur. The magnetic field in the iron core rotor induces eddy currents, leading to hysteresis losses, while bearings also contribute to wear-related losses.

To reduce losses in the rotor of a micro DC gear motor, using thicker wires with lower resistivity is a highly effective method. Copper rotors can reduce losses by about 10%, though this increases costs. Using laminated silicon steel sheets for the rotor can effectively reduce hysteresis losses and iron losses. Lengthening the iron core can also reduce magnetic flux density, or adding insulation coatings can further help.

Excessive temperature rise in micro DC gear motors leads to greater losses, and higher speeds result in increased friction losses. The windings and iron core rotor of micro DC motors also experience other stray losses that affect efficiency. Improving the stator windings can reduce the generation of higher-order harmonics, while insulating the rotor slot surfaces and using magnetic slot wedges can minimize the cogging effect.

This concludes the methods for improving the working efficiency of micro DC gear motors. For more information about micro DC motors, please contact WKX MOTOR.