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Rotor-stator structure of permanent magnet brushless DC motor

A DC motor, rotor stator technology, applied in the direction of magnetic circuit shape/style/structure, electric components, magnetic circuit, etc., can solve problems such as magnetic saturation, improve torque density and control accuracy, avoid tooth saturation, improve Effect of Winding Coefficient

Inactive Publication Date: 2016-09-28
ZHEJIANG ZOBOW MECHANICAL & ELECTRICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cogging structure of the above-mentioned permanent magnet brushless DC motor solidifies the winding coefficient of the motor, and at the same time, local magnetic saturation is prone to occur, which becomes the bottleneck for achieving high power density

Method used

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  • Rotor-stator structure of permanent magnet brushless DC motor
  • Rotor-stator structure of permanent magnet brushless DC motor
  • Rotor-stator structure of permanent magnet brushless DC motor

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Such as figure 1 As shown, the rotor-stator structure of the permanent magnet brushless DC motor includes a stator and a rotor 8 , and the stator includes stator teeth, stator slots 3 and stator windings 4 .

[0028] Specifically, as figure 1 As shown, the stator teeth include several armature teeth 1 and several auxiliary teeth 2, the armature teeth 1 and the auxiliary teeth 2 both include tooth tops 5 and tooth parts 6, the width of the tooth tops 5 is greater than the width of the tooth parts 6, and the tooth parts 6 It is connected to the middle part of the bottom surface of the tooth top 5 and integrally formed. The tooth tops 5 and tooth parts 6 of the armature teeth 1 have widths greater than or smaller than the tooth tops 5 and tooth parts 6 of the auxiliary teeth 2. A number of armature teeth 1 and a number of auxiliary teeth 2 are spaced apart from each other in sequence, adjacent to each other. The stator slot 3 is formed between the armature tooth 1 and th...

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Abstract

The invention provides a rotor stator structure of a permanent magnet brushless DC motor, which belongs to the technical field of motors. It solves the problems of low torque density and control precision of the existing permanent magnet brushless DC motor. The stator structure of the permanent magnet brushless DC motor includes stator teeth, stator slots and stator windings. The stator teeth include a number of armature teeth and auxiliary teeth. The width of the top and teeth, a number of armature teeth and a number of auxiliary teeth are spaced apart from each other in turn, a stator slot is formed between adjacent armature teeth and auxiliary teeth, the stator winding is embedded in the stator slot and each armature tooth Both are wound with a stator winding. The motor adopts the unequal tooth width design of the armature teeth and auxiliary teeth, which improves the winding coefficient of the motor. At the same time, by rationally designing the tooth width of the armature teeth and auxiliary teeth, the distribution of the magnetic density of the teeth is optimized to avoid saturation of the teeth and improve The output torque of the motor is improved, and the control accuracy of the motor is improved.

Description

technical field [0001] The invention belongs to the technical field of motors, and relates to a permanent magnet brushless DC motor, in particular to a rotor stator structure of the permanent magnet brushless DC motor. Background technique [0002] A permanent magnet motor is a device that establishes an excitation magnetic field by a permanent magnet to realize electromechanical energy conversion. Permanent magnet brushless DC motors, especially rare earth permanent magnet motors, have the characteristics of compact structure, small size, and light weight compared with electric excitation motors, and the size and structure of permanent magnet motors are flexible and diverse, and many structures can be topology form. Since the permanent magnet motor cancels the electric excitation system, the efficiency of the motor is improved, the structure of the motor is simplified, and the operation is reliable. [0003] In order to improve the efficiency of sewing machines and respon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/14H02K1/16
CPCH02K1/14H02K1/165H02K29/00H02K2213/03
Inventor 荆汝宝
Owner ZHEJIANG ZOBOW MECHANICAL & ELECTRICAL TECH
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