A hybrid stepper motor with U-shaped permanent magnet embedded in the stator

Abstract

The invention discloses a hybrid stepping motor with U-shaped permanent magnets embedded into a stator and belongs to the field of hybrid stepping motors. The hybrid stepping motor comprises a statorand a rotor which are formed by laminating silicon steel sheets, wherein a plurality of rotating teeth are uniformly distributed on the outer circumference of the rotor; the rotor comprises a rotor core and a rotating shaft; the stator comprises a stator core, stator windings, permanent magnets and an insulator; magnetic poles are distributed on the inner circumference of the stator core; five small teeth which are the same as the rotor in tooth pitch are distributed on a pole shoe of each magnetic pole; one phase of stator winding is arranged on the pole shoe of each magnetic pole; permanentmagnet slots are arranged in a yoke of the stator core at intervals of two magnetic poles; the permanent magnets are put into the corresponding permanent magnet slots; N poles and S poles of the permanent magnets are clung to the corresponding magnetic poles separately; and the permanent magnets are alternately arranged in a certain order. The permanent magnets are arranged in the stator core through the U-shaped slots, so that the structure of the rotor is simple, the processing difficulty of the motor is reduced, the hybrid stepping motor is suitable for high-speed operation, good in heat dissipation, not easy to demagnetize and easy to replace, magnetic fields generated by the permanent magnets are radial, and the utilization rate of the permanent magnets is high.

Description

technical field [0001] The invention belongs to the field of hybrid stepping motors, in particular to a hybrid stepping motor with U-shaped permanent magnets embedded in the stator. Background technique [0002] The permanent magnet of the traditional hybrid stepping motor is placed in the middle of the two stacked iron cores on the rotor, and is magnetized through the axial direction, and the small teeth of the two adjacent rotor iron cores need to be staggered by 1 / 2 of the tooth pitch from each other, so there is The following defects: [0003] 1. The structure of the rotor is complex and difficult to process. [0004] 2. Since the permanent magnet is magnetized in the axial direction, but the rotor and the stator are made of laminated silicon steel sheets, there will be a non-magnetic air gap between the adjacent silicon steel sheets, and the magnetic field generated by the stator winding is radial, so The utilization rate of permanent magnets is low. [0005] 3. The ...

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Problems solved by technology

[0007] In order to solve the defects of high processing difficulty, low utilization rate of permanent magnets, poor heat dissipation and difficult maintenance and replacement existing in the prior art, the present invention provides a hybrid stepper motor with U-shaped permanent magnets embedded in the stator

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