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Mixed-excitation magnetic pole structure

A magnetic pole structure and hybrid excitation technology, applied in the field of magnetic pole structure and hybrid excitation magnetic pole structure, can solve the problems of increasing the complexity and cost of the control system, reducing the torque density of the motor, reducing the efficiency, etc. long effect

Inactive Publication Date: 2012-04-18
何嘉颖
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The above two solutions either reduce the motor torque density, or reduce the efficiency, and also increase the complexity and cost of the control system

Method used

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  • Mixed-excitation magnetic pole structure
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  • Mixed-excitation magnetic pole structure

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Embodiment Construction

[0027] The purpose and application of the present invention will be further described below in conjunction with specific examples.

[0028] refer to figure 1 , which is a schematic diagram of the stator pole structure of a common variable reluctance motor.

[0029] refer to figure 2 , is a schematic diagram of the hybrid excitation pole structure of the first specific embodiment of the present invention;

[0030] Including core magnetic pole (5), coil winding (2), permanent magnet (3), permanent magnet (3) is built in the magnetic pole (5), the end of permanent magnet (3) close to the core magnetic pole (5) pole surface A and the iron core The distance between the pole faces of the magnetic pole (5) is L, where L is greater than zero, and the magnetization direction of the permanent magnet is along the center line of the coil or the core pole center line. When the coil winding is not energized, the permanent magnet flux is in the core pole Closed, when the coil winding is ...

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Abstract

The invention discloses a mixed-excitation magnetic pole structure, which comprises a core magnetic pole, a coil winding and a permanent magnet, wherein the coil winding is wound on the core magnetic pole; the permanent magnet is arranged in the core magnetic pole; the magnetization direction of the permanent magnet is the centerline direction of the coil winding or the core magnetic pole; and a distance L between the permanent magnet and the pole face of the core magnetic pole is more than zero. After current in a coil is cut off, a residual induced magnetic field can tend to be zero within a shorter time under the action of the permanent magnet, so that a larger current cutting-off angle can be obtained; a motor using the magnetic pole structure has higher average torque and slighter vibration; in addition, the magnetic pole structure is easy to manufacture and mount, and the permanent magnet is difficult to demagnetize and long in service life.

Description

technical field [0001] The invention relates to a magnetic pole structure applied to a motor, in particular to a hybrid excitation magnetic pole structure, which belongs to the field of electric drive equipment. [0002] Background technique [0003] Since there is no permanent magnet or winding on the rotor of the variable reluctance motor, the structure is simple, solid and reliable, and has strong fault-tolerant operation capability, simple speed regulation, and is suitable for high-speed operation. It has great development and application potential in the field of variable speed drive applications. [0004] Usually, the variable reluctance motor has a double salient pole structure. A certain number of salient poles are evenly distributed on the stator and rotor according to a certain law. There are no windings or permanent magnets on the rotor, and coils are wound on the salient poles of the stator; the rotor is always From the position with the smallest inductance to t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K19/12H02K1/27H02K1/24
Inventor 不公告发明人
Owner 何嘉颖
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