Permanent magnet brushless direct current motor for automobile window

Abstract

The invention discloses a permanent magnet brushless direct current motor for an automobile window. The permanent magnet brushless direct current motor consists of an upper end cover, a lower end cover, a machine case, a bearing, a clamp spring, a support frame, a sensor installing plate, a stator iron core, a rotor iron core, a coil bag and a permanent magnet, wherein the support frame is fixed on the stator iron core and is used for supporting the sensor installing plate; a rectangular groove is formed in the surface and is used for coil gear groove crossing connection; through the sensor installing plate, a sensor and the stator iron core realize separated installation; the sensor can be conveniently repaired; a rotor is a stepped shaft without a rotor punching sheet; the structure is simple; the permanent magnet is of a circular ring shape, adopts surface pasting type installation and is directly embedded into the rotor iron core with cylindrical steps; the positioning is simple; the upper surface of the permanent magnet is fixed by the clamp spring so as to prevent the axial movement. The whole structure of the motor is simple; the installation is convenient; the repair and the replacement of the sensor are convenient; the work efficiency is much greater than that of a traditional permanent magnet direct current brush motor for the automobile window; wide market prospectsare realized.

Description

technical field [0001] The invention relates to the field of permanent magnet motors, in particular to a permanent magnet brushless DC motor for automobile windows. Background technique [0002] In the current automobile industry, the electric lifting and lowering of automobile window glass has become a standard configuration. The motor for the window of the car is the power source for driving the window regulator. The quality and controllability of the motor performance determine the stability and safety of the car window glass lifting work. [0003] At present, the motors used in automobile windows are basically permanent magnet DC brushed motors. There are many disadvantages in brushed motors. Due to the existence of brush commutators, electric sparks may be generated and the service life is short. At the same time, the brushed motors are large in size and The weight is large and the efficiency is very low, generally only between 20% and 40%. However, the current perma...

AI Technical Summary

Problems solved by technology

[0003] At present, the motors used in automobile windows are basically permanent magnet DC brushed motors. There are many disadvantages in brushed motors. Due to the existence of brush commutators, electric sparks may be generated and the service life is short. At the same time, the brushed motors are large in size and Heavy weight and low efficiency, generally only between 20% and 40%

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