Low-cogging-torque motor stator and assembling method thereof

A technology of cogging torque and motor stator, which is used in electromechanical devices, manufacturing stator/rotor bodies, electrical components, etc. The process is simple, the winding process is convenient, and the manufacturing cost is low.

Inactive Publication Date: 2012-07-04
CHANGZHOU XINYA ELECTROMOTOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method has a certain effect in eliminating cogging torque, the manufacturing process is complicated, and the basic performance of the motor is difficult to meet the actual requirements due to its complex structure.

Method used

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  • Low-cogging-torque motor stator and assembling method thereof
  • Low-cogging-torque motor stator and assembling method thereof
  • Low-cogging-torque motor stator and assembling method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1. A stator of a low cogging torque motor, comprising a stator core 100 and a stator coil 200, wherein: the inner circumference of the stator core 100 integrally extends a plurality of stator teeth 110 distributed at intervals, and the ends of the stator teeth 110 are provided with The pole shoe 120 forms a stator slot 130 between adjacent stator teeth 110, and the stator coil 200 is placed in the stator slot 130. A step 121 is provided on both sides of each pole shoe 120. The step 121 corresponds to the step 121 on the adjacent pole piece 120 to form a bent notch 131 .

Embodiment 2

[0036] Embodiment 2. A stator of a low cogging torque motor, comprising a stator core 100 and a stator coil 200, wherein: two sides of each pole shoe 120 are provided with two steps 121 distributed at intervals, and the The step 121 of the pole shoe 120 is matched with the step 121 on the adjacent pole shoe 120 to form a notch 131 in a bent shape, and the rest is the same as that of the first embodiment.

Embodiment 3

[0037] Embodiment 3. A stator of a low cogging torque motor, comprising a stator core 100 and a stator coil 200, wherein: each side of each pole piece 120 is provided with three steps 121 distributed at intervals. The step 121 of the pole shoe 120 is matched with the step 121 on the adjacent pole shoe 120 to form a notch 131 in a bent shape, and the rest is the same as that of the first embodiment.

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Abstract

The invention relates to a low-cogging-torque motor stator. The low-cogging-torque motor stator comprises a stator iron core and stator coils, wherein a plurality of stator teeth are distributed at intervals and extended integrally from the inner circumference of the stator iron core; pole shoes are arranged at the tail ends of the stator teeth; a stator groove is formed between the adjacent stator teeth; the stator coils are placed in the stator grooves; one or more than one steps are arranged on two sides of each pole shoe; and the steps are correspondingly matched with the steps on the adjacent pole shoe to form a bend notch. The invention also relates to an assembling method for the low-cogging-torque motor stator. The assembling method comprises the following steps of: laminating stator punching sheets with different pole shoe widths into the stator iron core; correspondingly matching the steps with the steps on the adjacent pole shoe to form the bend notch; and placing the stator coils in the stator grooves so as to finish assembly of the stator. The invention meets the basic performance of a motor and greatly reduces cogging torque.

Description

technical field [0001] The invention relates to a stator of a low cogging torque motor, and also relates to an assembly method of the stator of the low cogging torque motor, belonging to the field of DC brushless permanent magnet motors. Background technique [0002] Compared with induction motors, DC brushless permanent magnet motors have good controllability, large starting torque, low-speed direct drive, high power factor and density, etc., but their large cogging torque has always been a DC non-magnetic motor The inherent deficiency of the brush permanent magnet motor, the cogging torque is the torque generated in the circumferential direction by the interaction between the permanent magnet magnetic field and the cogging of the armature core when the armature winding is not energized. Cogging torque often becomes the basic cause of motor vibration and noise and limits the improvement of control accuracy, especially when the cogging torque frequency is consistent with the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/14H02K1/16H02K15/02
CPCH02K1/148H02K2201/06H02K29/03
Inventor 张咏玉
Owner CHANGZHOU XINYA ELECTROMOTOR
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