DC brushless motor

Abstract

An embodiment of the present invention provides a DC brushless motor, including a motor insulating shell, a first motor end cover, a second motor end cover, and a For the group of working parts of the motor in the space enclosed by the two motor end covers, a first insulating cover is provided on the periphery of the first motor end cover, and a second insulating cover is provided on the periphery of the second motor end cover, wherein the first Both the motor end cover and the second motor end cover are conductive covers. The DC brushless motor provided by the present invention avoids direct or indirect contact between the motor and external conductive substances in the installation environment by adding insulating covers on the periphery of the two motor end covers, and prevents electrical corrosion of the motor bearings.

Description

Technical field[0001]The present invention relates to the technical field of motor equipment, and more particularly to a DC brushless motor.Background technique[0002]The DC brushless motor is driven by the pulse width modulation (PWM), and the motor generates a shaft voltage due to the rotor during the operation of the rotor during the operation. Between the inner and outer rings in the rotor bearing, the ball and the undertaking member are reduced by the oil film by the oil film, the inner ring is connected to the bearing, the outer ring is connected to the end cap. However, when the shaft voltage is greater than a certain value, the oil film will be insulated, causing electrical corrosion in the surface of the bearing ball or the inner outer ring, thereby causing noise, shortening the bearing life; if severely causing the motor to operate normally.[0003]At present, the problem of motor electric corrosion is mainly improved by the following technical solutions:[0004]1, the two end ...

AI Technical Summary

Problems solved by technology

[0006] 3. The motor balls are replaced with ceramic materials to prevent breakdown, but the cost is high;

[0008] The above measures are based on the improvement of the structure and components of the motor itself. Although the shaft voltage of the motor itself has been reduced, there is still the problem of electrical corrosion in the use of specific products.

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