Radiating structure for outer-rotor direct-current brushless motor

Abstract

The invention discloses a radiating structure for an outer-rotor direct-current brushless motor. In the radiating structure, a radiating boss is machined on the inner wall of a stator protective end cover; the plane of the boss is in insulative close contact with a radiating plane of an electronic element on a direct-current electric control circuit board; and a groove is reserved on the outer wall, corresponding to the position of the boss, of the stator protective end cover. Because an original radiating bracket installation position of the electronic element is changed to the boss of the inner wall of the stator protective end cover from a stator bearing bracket, the radiating boss of the electronic element is far away from a stator winding heating source, and the stator winding heating source is prevented from diffusing and transferring directly through the stator bearing bracket in a split structure mode; and because the radiating groove is reserved on the outer wall of the radiating boss, on one hand, a radiating effect is improved by increasing a radiating area, on the other hand, the rigidity of a shell of a product is improved and material cost is saved. The radiating structure has high radiating efficiency, high rigidity and low production cost, and is suitable to be used in various outer-rotor direct-current brushless motors.

Description

technical field [0001] The invention relates to an outer rotor DC brushless motor, in particular to a heat dissipation structure of the outer rotor DC brushless motor. Background technique [0002] In the prior art, the heat dissipation method of the electronic components on the DC electric control circuit board built in the outer rotor DC brushless motor is to form a heat dissipation support on the inner frame of the stator bearing support, and closely attach the heat dissipation plane of the electronic components to the heat dissipation surface in an insulating manner. On the plane of the bracket, the heat emitted by the electronic components in the working state is transferred to the stator bearing bracket through the heat dissipation bracket, and then diffused and transmitted to the outside air through the stator bearing bracket to achieve the purpose of heat dissipation. However, because the stator bearing bracket itself is fixed with a stator When the winding and the m...

AI Technical Summary

Problems solved by technology

[0002] In the prior art, the heat dissipation method of the electronic components on the DC electric control circuit board built in the outer rotor DC brushless motor is to form a heat dissipation support on the inner frame of the stator bearing support, and closely attach the heat dissipation plane of the electronic components to the heat dissipation surface in an insulating manner. On the plane of the bracket, the heat emitted by the electronic components in the working state is transferred to the stator bearing bracket through the heat dissipation bracket, and then diffused and transmitted to the outside air through the stator bearin

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