A DC brushless motor with heat sink

Abstract

The invention provides a DC brushless motor with a cooling device, which includes a motor body and a cooling device arranged on the motor body; the motor body includes a motor casing, a bearing seat arranged in the motor casing, a set The bearing on the bearing seat and the main shaft that is connected with the shaft of the bearing hole and passes through the motor casing; the heat dissipation device includes a plurality of heat dissipation through holes and a plurality of heat dissipation fins arranged on the motor casing, The heat dissipation fins are arranged around the outer circumference of the motor, and the heat dissipation through holes are opened on the end surface where the central axis of the main shaft intersects the motor casing. By using the heat dissipation device in the present application, the heat generated by the motor can be effectively taken away from the inside of the motor, so as to effectively realize heat exchange and further improve the life of the motor. The overall structure is simple, the reliability is high, and it has good practicability.

Description

technical field [0001] The invention relates to the field of DC brushless motors, in particular to a DC brushless motor with a heat sink. Background technique [0002] At present, the brushless DC motors on the market do not have a good heat dissipation device. When the temperature of the motor increases, the aging of wires and electronic components will be accelerated, and the reliability will be poor; the working temperature of the motor is too high, which will affect the working efficiency of the motor. Reduce its service life; secondly, if the temperature is too high, the magnetism of the internal permanent magnet will be reduced, and the output torque will be weakened; the bearings arranged at both ends of the permanent magnet are easily damaged due to fatigue due to excessive temperature; in the long run, abnormal vibration and noise will be generated. Therefore, it is necessary to dissipate heat during the operation of the motor. SUMMARY OF THE INVENTION [0003] B...

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Problems solved by technology

[0002] At present, none of the brushless DC motors in the market has a good heat dissipation device. When the temperature of the motor rises, the aging of the wires and electronic components will be accelerated, and the reliability will be poor; the working temperature of the motor is too high, which will affect the working efficiency of the motor. Reduce its service life; secondly, if the temperature is too high, the magnetic properties of the permanent magnet inside will decrease, and the output torque will be weakened; the bearings arranged at both ends of the permanent magnet will easily cause fatigue damage due to excessive temperature; if things go on like this, abnormal vibration and noise will occur

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