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Excitation adjustable type permanent magnet synchronous motor

A permanent magnet synchronous motor, adjustable technology, applied to synchronous machines, synchronous motors with stationary armatures and rotating magnets, synchronous machine parts, etc., to achieve simple operation, improve efficiency, and facilitate control

Inactive Publication Date: 2015-07-08
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention designs and develops a permanent magnet synchronous motor with adjustable excitation. The purpose is to solve the problem that the permanent magnet of the existing permanent magnet synchronous motor has constant excitation and high-speed rotation. The structure of permanent magnet synchronous motor with reduced excitation field

Method used

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  • Excitation adjustable type permanent magnet synchronous motor
  • Excitation adjustable type permanent magnet synchronous motor
  • Excitation adjustable type permanent magnet synchronous motor

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Embodiment Construction

[0044] The present invention will be further described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the description.

[0045] like figure 1As shown, the present invention provides an adjustable excitation permanent magnet synchronous motor, which includes a casing 1 , a stator 2 and a rotor 3 inside the casing 1 . There is an air gap between the inner surface of the stator 2 and the outer surface of the rotor 3, and the stator 2 is composed of a stator core and a stator winding. The rotor 3 includes a rotor core 4 , a motor shaft 5 , and permanent magnet assemblies 6 arranged in pairs. The motor shaft 5 is a through shaft made of magnetically isolated metal. The permanent magnet assembly 6 is placed in the through slot on the rotor core 4 , the permanent magnet assembly 6 forms a regular polygon at the end of the rotor 3 , and the center of the regular polygon is on the centerline of the ro...

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Abstract

The invention discloses an excitation adjustable type permanent magnet synchronous motor. The excitation adjustable type permanent magnet synchronous motor comprises a rotor, the rotor comprises a plurality of paired permanent magnet assemblies, and each permanent magnet assembly comprises a cylindrical permanent magnet, a cover plate and a rotary driving mechanism. Parallel magnetization is adopted in the cylindrical permanent magnets, and the cylindrical permanent magnets are closely arranged in parallel. The appearances of the cover plates are of a cuboid structure, the cover plates are made of permeability magnetic materials, and the cylindrical permanent magnets are arranged in the cover plates to form the cuboid-shaped permanent magnets. The rotary driving mechanisms are connected with the cylindrical permanent magnets, and when the rotor rotates, the cylindrical permanent magnets are driven to rotate around the axes of themselves so that the magnetic flux of the permanent magnet assemblies can be reduced. The rotor structure of a traditional permanent magnet synchronous motor is changed, magnetic poles of the permanent magnets are pulled by an electromagnet in the motor to rotate, the excitation magnetic flux can be adjusted by itself, and therefore large demagnetizing current components do not need to be applied at high speed, and motor efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of permanent magnet synchronous motors, in particular to an excitation-adjustable permanent magnet synchronous motor. Background technique [0002] The permanent magnet synchronous motor is a three-phase current in the stator winding of the motor. After the current is passed in, a rotating magnetic field will be formed in the stator winding of the motor. Since the permanent magnet is installed on the rotor, the magnetic pole of the permanent magnet is fixed. According to the principle of same-sex attraction and opposite-sex repulsion of magnetic poles, the rotating magnetic field generated in the stator will drive the rotor to rotate, and finally the rotation speed of the rotor is equal to the rotation speed of the rotating magnetic poles generated in the stator. Permanent magnet synchronous motors are often used as drives in electric vehicles. [0003] Permanent magnet synchronous motor phase voltage u s ...

Claims

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Application Information

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IPC IPC(8): H02K21/14H02K21/02
CPCH02K21/021H02K21/14Y02T10/64
Inventor 常成宋传学宋世欣李少坤肖峰王达
Owner JILIN UNIV
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