Brushless permanent magnet direct current motor with windings on sunken skewed slots reserved on crowns of stator and rotor

A stator-rotor, permanent magnet DC technology, applied in the direction of electromechanical devices, electrical components, magnetic circuit rotating parts, etc., can solve problems such as distortion, and achieve high reliability and easy control

Inactive Publication Date: 2012-12-05
安徽东道新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides a brushless permanent magnet DC motor with a stator and rotor tooth crowns provided with concave inclined slot windings. Solve the problems of signal distortion, starting, energy saving and environmental protection, vibration, noise, etc., and solve the stator core silicon steel punching sheet tooth crown opening auxiliary groove technology in the production and manufacturing of the stator core silicon steel punching sheet; improve the motor power to facilitate starting, energy saving and environmental protection , small vibration, low noise, continuous and stable operation of the motor, more convenient in the process of manufacturing and maintenance

Method used

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  • Brushless permanent magnet direct current motor with windings on sunken skewed slots reserved on crowns of stator and rotor
  • Brushless permanent magnet direct current motor with windings on sunken skewed slots reserved on crowns of stator and rotor

Examples

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Effect test

Embodiment 1

[0013] Example 1: Stator and rotor tooth crowns are provided with concave inclined grooves. The winding brushless permanent magnet DC motor adopts stator silicon steel stamping tooth crowns to open auxiliary grooves. First consider the relationship between the combination of the number of slots Z and the number of poles 2p and the cogging torque. It is generally believed that the larger the number of cycles of the fundamental cogging torque, the smaller its amplitude. Therefore, it is advisable to choose the combination of stator slot number Z and rotor pole number 2p with a larger least common multiple (LCM). Z.Q.Zhu and D.Howe proposed an evaluation factor for selecting the combination of the number of stator slots Z and the number of poles 2p. And it is believed that the smaller the evaluation factor is, the lower the peak value of the cogging torque is. Obviously, numerically it is the greatest common divisor N of the number of slots Z and the number of poles 2p M . Ac...

Embodiment 2

[0018] Embodiment 2: The tooth crown of the stator rotor is provided with a concave chute, and the winding brushless permanent magnet DC motor stator rotor iron core silicon steel sheet tooth crown is provided with an auxiliary concave chute. In order to reduce the fundamental cogging torque, it is a simple and effective method to set up auxiliary concave oblique slots on the stator core tooth crown. Usually limited to the space of the tooth crown, the number of grooves to be opened can be selected from 1 or 2, and in some cases, more grooves can be selected. The groove can be distance-shaped or semi-circular. The principle of opening the auxiliary groove to reduce the fundamental cogging torque is equivalent to increasing the number of fundamental cogging torque cycles, and the new fundamental cogging torque of the auxiliary groove has an Compensation effect, so that the amplitude of the total fundamental cogging torque is reduced. The addition of auxiliary grooves on the t...

Embodiment 3

[0020]Embodiment 3: Fractional slot winding chute; fractional slot winding chute technology is the technique of opening auxiliary grooves in the stator crown of the brushless permanent magnet DC motor with concave chute on the crown of the stator rotor. Stator skew, rotor skew or rotor pole segment dislocation method. The number of cogging torque fundamental wave periods occurring in each revolution of the rotor is equal to the least common multiple NC of the number of stator slots Z and the number of poles 2p, that is, the mechanical angle θ1=360 degrees / N_C corresponding to one cogging torque fundamental wave period. Therefore, if the skew angle of the stator core or the skew angle of the rotor magnetic pole λSK is equal to it, the fundamental wave of the cogging torque can be eliminated: θSK=360 degrees / N_C. For integer slot motors, NC=Z, chute angle θSK, θSK=360 degrees / Z. But it should be pointed out that it will reduce the counter electromotive force and output electrom...

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Abstract

The invention discloses a brushless permanent magnet direct current motor with windings on sunken skewed slots reserved on crowns of a stator and a rotor. The structure of the direct current variable frequency brushless permanent magnet motor is that: grooves are formed on crowns of a stator silicon steel lamination; the stator is laminated to form the low-reluctance fundamental wave torque of the skewed slots; auxiliary grooves are formed on the crowns of a rotor silicon steel lamination; the stator silicon steel lamination is laminated into the skewed slots; and a plurality of coil windings, a plurality of groups of magnetic steel permanent magnets and the crowns of the rotor are provided with grooves. The motor also comprises an equal-pole Hall sensor, a Hall sensor circuit board for driving the Hall sensor and an equal-pole sensor system. The motor has the advantages that the reliability of the permanent magnet brushless direct current motor is improved, the permanent magnet brushless direct current motor is easy to control, the permanent magnet brushless direct current motor is a main power motor for a high-end electric vehicle, and the problems of high starting current, motor vibration and noise of the main power motor for the high-end electric vehicle are solved.

Description

technical field [0001] The invention relates to the technical field of permanent-magnet brushless motors with various brushless DC frequency conversion brushless fundamental wave cogging torques. Specifically, it solves the field weakening technology of DC variable frequency brushless permanent magnet motor, reduces the fundamental wave cogging torque, and creates auxiliary grooves for the inner stator silicon steel stamping crown of the motor to solve the cogging fundamental wave cogging torque in manufacturing. Background technique [0002] Nowadays, all countries in the world are researching permanent magnet brushless DC motors. Various permanent magnet brushless DC motors have achieved new scientific research achievements in various undertakings. "In terms of production technology, there is fundamental wave cogging torque, that is, reluctance torque. Only when the reluctance torque is less than 1, can the motor be started easily, energy saving and environmental protectio...

Claims

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Application Information

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IPC IPC(8): H02K29/08H02K1/14H02K1/24
Inventor刘胜恒
Owner安徽东道新能源科技有限公司