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A double salient permanent magnet motor

A permanent magnet motor, double salient pole technology, applied in magnetic circuits, electromechanical devices, electrical components, etc., can solve the problems of reduced effective stator slot area, difficult heat dissipation of permanent magnets, large torque fluctuations, etc., to increase the effective stator The effect of increasing the slot area, increasing the allowable current, and increasing the cross-sectional area

Active Publication Date: 2020-10-30
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Based on the deficiencies in the prior art, the present invention provides a doubly salient permanent magnet motor, which can better solve the problem of the effective stator caused by the radial length of the permanent magnet being equal to the sum of the radial lengths of the magnetic teeth and the stator yoke. Reduced slot area, difficult heat dissipation of permanent magnets, and large torque fluctuations

Method used

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  • A double salient permanent magnet motor
  • A double salient permanent magnet motor
  • A double salient permanent magnet motor

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Embodiment Construction

[0032] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be noted that the following embodiments are intended to facilitate the understanding of the present invention, but do not limit it in any way.

[0033] This embodiment and accompanying drawings only illustrate the situation that the motor has 12 stator core blocks, 8 rotor cores and 12 permanent magnets, but the present invention is also applicable to other doubly salient pole permanent magnet motor structures meeting the requirements of the present invention.

[0034] Such as figure 1 As shown, the structure of the existing doubly salient pole motor includes a stator and a rotor with a salient pole structure, the stator includes a stator core, an armature winding 3 and a permanent magnet 4, the rotor is only composed of a rotor core 2, and the rotor core 2 includes a rotor yoke 21 and rotor teeth 22. The stator core and the rotor core ...

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Abstract

The invention provides a double-salient permanent magnet motor which comprises a stator of a convex structure and a rotor. The stator comprises a stator core, permanent magnets and armature windings.The rotor is formed by rotor cores, the stator core is formed by combining a plurality of stator core blocks, each of the stator core blocks comprises a stator yoke and at least one armature tooth disposed on the stator yoke, and the armature winding is wound on the armature tooth. The permanent magnet is embedded between stator yokes of two adjacent stator core blocks, the radial length of the permanent magnets is greater than the radial length of the stator yokes, and one end of each of the permanent magnets is level with the bottom of a stator yoke. According to the double-salient permanentmagnet motor, the area of a stator slot is increased by reducing the radial length of magnetic conductive teeth or canceling the magnetic conductive teeth, the increase of the cross-sectional area ofthe armature winding wires is facilitated, the winding resistance is reduced, the allowable current is increased, and the motor torque density is further Increased.

Description

technical field [0001] The invention belongs to the technical field of motors, in particular to a double salient pole permanent magnet motor. Background technique [0002] The doubly salient permanent magnet motor is a stator type permanent magnet motor in which permanent magnets are mounted on the stator yoke. Compared with the rotor type permanent magnet motor, the doubly salient permanent magnet motor has the advantages of high efficiency, high power density, high reliability and simple structure, so it has been widely valued by people in the field of electrical engineering. [0003] However, when the size of the motor is fixed, the size of the stator slot of the traditional doubly salient permanent magnet motor is limited by the size of the permanent magnet. Increasing the size of the permanent magnet will lead to a decrease in the area of ​​the stator slot, resulting in a lower torque density of the motor. In the existing improved doubly salient pole motor structure, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K1/14H02K1/17H02K9/00H02K1/20H02K29/03
CPCH02K1/146H02K1/17H02K1/20H02K9/00H02K29/03H02K2213/03
Inventor 吴立建明广强章懰方攸同黄晓艳
Owner ZHEJIANG UNIV
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