Steering engine and multi-pole-pair permanent magnetic direct-current brushless motor for same

Abstract

The invention discloses a steering engine and a multi-pole-pair permanent magnetic direct-current brushless motor for the same. The multi-pole-pair permanent magnetic direct-current brushless motor comprises a stator fixed in a motor shell, a rotor arranged in the stator and sensors arranged along the periphery of the rotor and used for sensing magnetic pole changes in the rotation process of the rotor so as to send out signals. The rotor comprises multiple tile type permanent magnets used for increasing magnetic flux density of the steering engine so as to improve steering engine rotation control accuracy; the tile type permanent magnets are arranged equidistantly along the periphery of the rotor and fixedly connected to a rotor core of the rotor, the tile type permanent magnets identical in appearance are south-pole permanent magnets or north-pole permanent magnets, one permanent magnets and one north-pole permanent magnet form a pair of magnetic poles, and the rotor comprise at least two pairs of magnetic poles. The tile type permanent magnets can be magnetized at one time along the periphery of the rotor after being assembled and can be magnetized separately prior to being assembled, the assembly process is simple, magnetic leakage factors are small, gap flux density is high, and utilization rate of the permanent magnets is higher.

Description

technical field [0001] The invention relates to the field of control devices, in particular to a multi-pair pole permanent magnet brushless DC motor used for steering gear. In addition, the present invention also relates to a steering gear comprising the above-mentioned multi-pole permanent magnet brushless DC motor for steering gears. Background technique [0002] The steering gear is an automatic control system composed of a DC drive motor, a reduction gear set, a sensor and a control circuit. When the steering gear is in working condition, according to the received external control signal or instruction, the control part of the steering gear can accurately control the output terminal to rotate at a certain speed within the set rotation angle and under the load condition. angle or position. [0003] Most of the existing steering gears use single-pole motors. The resolution of the rotation angle of the output shaft of the steering gear is limited by the controllable rotat...

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Problems solved by technology

[0004] The invention provides a multi-pole permanent magnet brushless DC motor and a steering gear used for steering gears to solve the problem that the resolution of the rotation angle of the output shaft of the steering gear is limited by the controllable rotation angle of the motor in the existing steering gear motor , the rotation angle accuracy of the steering gear is low; the single-pole structure is adopted, and the output power is low; and when the permanent magnet is magnetized as a whole (that is, the pole arc coefficient is 1), it is easy to leak magnetic flux. The technical problem that the magnetization arc is large and the rotation is broken

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