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Built-in V-type-U-type serial-parallel hybrid magnetic circuit adjustable magnetic flux permanent magnet synchronous motor

A technology of permanent magnet synchronous motor and hybrid magnetic circuit, which is applied in the direction of synchronous motor with stationary armature and rotating magnet, magnetic circuit, magnetic circuit rotating parts, etc., to achieve small magnetizing current, wide speed regulation range, and easy The effect of charge and demagnetization

Inactive Publication Date: 2019-07-05
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems existing in the magnetic adjustment process of the existing permanent magnet motor, and to provide a built-in V-type-U-type series-parallel hybrid magnetic circuit adjustable flux permanent magnet synchronous motor

Method used

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  • Built-in V-type-U-type serial-parallel hybrid magnetic circuit adjustable magnetic flux permanent magnet synchronous motor
  • Built-in V-type-U-type serial-parallel hybrid magnetic circuit adjustable magnetic flux permanent magnet synchronous motor
  • Built-in V-type-U-type serial-parallel hybrid magnetic circuit adjustable magnetic flux permanent magnet synchronous motor

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Embodiment 1: see figure 1 The motor of the present invention includes a stator core 1, an armature winding 2, a rotor core 3, a rotating shaft 12, a low-coercivity permanent magnet 5, a high-coercivity permanent magnet 8, a V-shaped end magnetic separation slot 6, a V-shaped tip spacer Magnetic slot 7, U-shaped bottom angle magnetic isolation slot 10 and U-shaped end magnetic isolation slot 11; the rotor core 3 is fixed on the rotating shaft 12, the armature winding 2 is located in the stator core 1, between the stator core 1 and the rotor core 3 There is a radial air gap;

[0025] Rotor core 3 has multiple permanent magnets built into the body on the air gap side to form a P pair of magnetic poles. Each magnetic pole includes two low-coercivity permanent magnets 5 and three high-coercivity permanent magnets 8. Three high-coercivity permanent magnets 8. A U-shaped structure is arranged symmetrically with the direct axis of the magnetic pole rotor as a line of symmetry...

Embodiment 2

[0033] Example 2: see figure 2 , is improved on the basis of Embodiment 1, and also includes a central rib 13, which is arranged inside the V-shaped tip magnetic isolation groove 7 along the direction of the rotor direct axis, and divides the groove into two parts.

[0034] The purpose of this embodiment is to improve the mechanical strength of the rotor. The width of the central rib 13 can be reasonably selected after comprehensively considering the mechanical strength and electromagnetic performance requirements of the motor.

Embodiment 3

[0035] Embodiment 3: see image 3 , improve on the basis of Example 2, the V-shaped end magnetic separation groove 6 is replaced by a trapezoidal groove, the purpose of this setting is to form a magnetic bridge on the rotor air gap side, limit the magnetic flux passing through the magnetic bridge, not only reduce the low The coercive force permanent magnet 5 is caused by self-short circuit leakage, and reduces the impact of the high coercive force permanent magnet 8 on the low coercive force permanent magnet 5, and increases the effect on the low coercive force permanent magnet 5 simultaneously. The direct-axis component of the armature charge and demagnetization magnetic potential makes it easier to realize charge and demagnetization, and the speed regulation range of the motor is wider.

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Abstract

The invention provides a built-in V-type-U-type serial-parallel hybrid magnetic circuit adjustable magnetic flux permanent magnet synchronous motor, and belongs to the field of permanent magnet motors. The problems existing in a magnetic adjustment process of the existing permanent magnet motor are solved. The scheme of the invention is as follows: a plurality of permanent magnets are built in anair gap side of a rotor core to form P pairs of magnetic poles, each magnetic pole comprises two low-coercivity permanent magnets and three high-coercivity permanent magnets, the three high-coercivitypermanent magnets are symmetrically disposed as a U-shaped structure with a straight shaft of a rotor of the magnetic pole as a symmetrical line, and an opening faces to a radial air gap; the two low-coercivity permanent magnets are symmetrically disposed as a V-shaped structure with the straight shaft of the rotor of the magnetic pole as the symmetrical line, and the opening faces to the radialair gap; the V-shaped structure is disposed in the U-shaped structure; and a V-shaped end part magnetic isolation groove is respectively formed in two end parts of the V-shaped structure, a V-shaped top end magnetic isolation groove is formed in a top end part of the V-shaped structure, a U-shaped end part magnetic isolation groove is respectively formed in the two end parts of the opening of theU-shaped structure, and a U-shaped base angle magnetic isolation groove is respectively formed in the two base angles of the U-shaped structure.

Description

technical field [0001] The invention relates to a built-in V-type-U-type series-parallel hybrid magnetic circuit adjustable magnetic flux permanent magnet synchronous motor rotor structure, which belongs to the field of permanent magnet motors. Background technique [0002] Traditional rare earth permanent magnet synchronous motors have the advantages of high power factor, high power density, high efficiency, and high reliability, and are widely used in electric vehicles, rail transit, household appliances, aerospace and defense industries and other fields. Traditional high-performance rare-earth permanent-magnet synchronous motors generally use high-coercivity permanent magnets such as NdFeB. The air-gap magnetic field of the motor is difficult to adjust, resulting in a narrow constant power area and a narrow speed regulation range when the motor is running electrically. In order to obtain a wide range of speed regulation and to realize constant power control when the perma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K21/14H02K1/27H02K1/24
CPCH02K21/14H02K1/2766H02K1/24
Inventor 郑萍乔光远刘法亮刘勇刘国鹏
Owner HARBIN INST OF TECH
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