Sealed Claw Pole Axial Magnetic Permanent Magnet Brushless DC Motor

Abstract

The invention provides a sealing claw pole and axial magnetic circuit permanent magnetic brushless direct-current motor. A motor stator is characterized in that claw poles are uniformly and perpendicularly fixed around a base, central lines of the claw poles are parallel to axis of a rotating shaft, a coil winding is mounted on each claw pole in a sleeved manner, the base of the motor stator and the coil windings on the claw poles of the base are covered and sealed by plastic to form a barrel-shaped plastic sealing member, and a cover covers and seals the barrel-shaped plastic sealing member; the rotating shaft of a motor rotor penetrates the stator base, an iron core is perpendicularly fixed, permanent magnet magnetic steel is uniformly fixed on the iron core, and sensor magnetic steel is fixed at the center of the other side of the iron core and corresponds to a Hall sensor fixed on the inner wall of the cover. The sealing claw pole and axial magnetic circuit permanent magnetic brushless direct-current motor has the advantages that an axial magnetic circuit is adopted, and the motor is large in torque, high in efficiency, small in size and space and high in system integrity.

Description

technical field [0001] The present invention relates to electric motors for automotive engine applications, such as control of valves for throttle, waste recirculation, turbocharging, swirl control, etc. Background technique [0002] With the improvement of the national economy and people's living standards, the number of various vehicles is increasing rapidly year by year, and the electrification of automobile engine control is constantly advancing, replacing the original simple mechanical or hydraulic control. The precise control of electrification can greatly improve the performance of the car, reduce fuel consumption, and control emissions at the same time. The electrification control of these valve bodies requires precision electromechanical products to implement control, and this motor must be able to withstand the high temperature, vibration, and erosion of the engine environment, while ensuring long service life. [0003] The electronic components inside the motor a...

AI Technical Summary

Problems solved by technology

[0004] The motor adopts the traditional radial magnetic circuit structure, which requires two sets of bearings for support, plus the ordinary sensor mounting bracket, the motor will be very long, which is not conducive to system integration

[0005] However, if a brushed motor arrangement is used, not only the brushed motor cannot meet the high life requirements of the engine, but also it needs gear combination torque conversion, resulting in additional layout difficulty and quality control complexity

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