Permanent magnet series-parallel connection type variable magnetic circuit adjustable magnetic flux motor

A flux motor and permanent magnet technology, applied in the direction of magnetic circuit, magnetic circuit rotating parts, magnetic circuit static parts, etc., can solve the problem of low power density and low coercivity permanent magnet magnetization of parallel adjustable flux motor Difficult state adjustment, volume increase, etc., to achieve the effect of small magnetizing current, stable working point, and small demagnetization current

Active Publication Date: 2021-06-22
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of difficulty in adjusting the magnetization state of the low-coercivity permanent magnet of the series adjustable flux motor and the problem of low power density of the parallel adjustable flux motor, the present invention proposes a permanent magnet series-parallel variable magnetic circuit Adjustable flux motor, the low-coercivity permanent magnet and the high-coercivity permanent magnet are mixed and placed in the V-shaped and U-shaped permanent magnet slots, so that the volume of the low-coercivity permanent magnet and the high-coercivity permanent magnet is increased , can increase the power density of the motor; reasonably arrange the positions of the low-coercivity permanent magnets and the high-coercivity permanent magnets in the rotor, so that part of the magnetic flux of the high-coercivity permanent magnets and the low-coercivity permanent magnets Part of the magnetic flux of the high-coercivity permanent magnet is connected in series, and part of the flux of the high-coercivity permanent magnet is connected in parallel with the part of the flux of the low-coercivity permanent magnet, which can solve the magnetization state adjustment of the low-coercivity permanent magnet of the series adjustable flux motor Difficult problem and low power density of shunt variable flux motors

Method used

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  • Permanent magnet series-parallel connection type variable magnetic circuit adjustable magnetic flux motor
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  • Permanent magnet series-parallel connection type variable magnetic circuit adjustable magnetic flux motor

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specific Embodiment approach 1

[0028] Specific implementation mode one: the following combination Figure 1-4 To illustrate this embodiment, the permanent magnet series-parallel variable magnetic circuit adjustable flux motor of the present invention includes a stator core 1, an armature winding 2, a rotor core 3 and a rotating shaft 12; the rotor core 3 is fixed on the rotating shaft 12, and the motor The pivot winding 2 is located in the stator core 1 .

[0029] Also includes V-shaped permanent magnet slot 4, low-coercivity permanent magnet, U-shaped permanent magnet slot 9, high-coercivity permanent magnet, No. 1 magnetic isolation slot 6, No. 2 magnetic isolation slot 7, and No. 3 magnetic isolation slot 10 and No. 4 magnetic isolation slot 11;

[0030] Five low-coercivity permanent magnets and five high-coercivity permanent magnets are arranged under each magnetic pole, and the five low-coercivity permanent magnets are respectively two No. 1 low-coercivity permanent magnets 5-1 and three No. 2 permane...

specific Embodiment approach 2

[0037] Specific embodiment two: The difference between this embodiment and embodiment one is that two No. 1 high-coercivity permanent magnets 8-1 are positioned at the V-shaped inner side and close to the bottom angle of the V-shaped permanent magnet groove 4 grooves, two pieces The No. 1 high-coercivity permanent magnet 8-1 is symmetrically arranged in the V-shaped permanent magnet slot 4 with the rotor direct axis as the symmetric line, the V-shaped included angle is 30-170 degrees, and the remaining space in the V-shaped permanent magnet slot 4 It is the No. 1 low-coercive force permanent magnet 5-1; three No. 2 high-coercive force permanent magnets 8-2 are placed on the upper layer (U-shaped inner side) of the U-shaped permanent magnet groove 9, and three No. 2 low-coercive force permanent magnets The permanent magnet 5-2 is placed on the lower floor (U-shaped outside) of the U-shaped permanent magnet groove 9, that is, the two are arranged side by side along the thickness ...

specific Embodiment approach 3

[0038] Specific embodiment three: the difference between this embodiment and embodiment one is that two No. 1 high-coercive force permanent magnets 8-1 are located at the V-shaped inner side and near the two ends of the V-shaped permanent magnet groove 4 notch , two No. 1 high-coercivity permanent magnets 8-1 are symmetrically arranged in the V-shaped permanent magnet slot 4 with the rotor direct axis as the symmetric line, the V-shaped included angle is 30-170 degrees, and the V-shaped permanent magnet slot 4 The remaining space in the interior is No. 1 low-coercivity permanent magnet 5-1; No. 3 No. 2 high-coercivity permanent magnets 8-2 are placed on the lower floor (U-shaped outside) of U-shaped permanent magnet groove 9, and No. 3 No. 3 lower The coercivity permanent magnet 5-2 is placed on the upper layer (U-shaped inside) of the U-shaped permanent magnet groove 9, and the included angle of the U-shaped permanent magnet groove 9 is adjustable.

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Abstract

The invention discloses a permanent magnet series-parallel connection type variable magnetic circuit adjustable magnetic flux motor, belongs to the field of permanent magnet motors, and aims to solve the problems that the magnetization state of a low-coercivity permanent magnet of a series connection type adjustable magnetic flux motor is difficult to adjust and the power density of a parallel connection type adjustable magnetic flux motor is low. The motor comprises a stator iron core, armature windings, a rotor iron core, V-shaped permanent magnet grooves, low-coercivity permanent magnets, U-shaped permanent magnet grooves, high-coercivity permanent magnets, magnetic isolation grooves and a rotating shaft. Five low-coercive-force permanent magnets and five high-coercive-force permanent magnets are arranged below each magnetic pole, two first high-coercive-force permanent magnets are placed on the upper layer of the V-shaped permanent magnet groove, and the rest space in the groove is provided with the first low-coercive-force permanent magnets. The two ends and the tip end of the V-shaped permanent magnet groove are each provided with a magnetic isolation groove, three second high-coercive-force permanent magnets and three second low-coercive-force permanent magnets are arranged in the U-shaped permanent magnet grooves side by side in the thickness direction, the included angle of the U-shaped permanent magnet grooves is adjustable, and magnetic isolation grooves are formed in the two ends of the U-shaped permanent magnet grooves and the U-shaped bottom corners respectively.

Description

technical field [0001] The invention relates to a permanent magnet series-parallel variable magnetic circuit adjustable flux 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 permanent magnet motor is running at a high spe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/27H02K1/16
CPCH02K1/276H02K1/16Y02T10/64
Inventor 刘勇乔光远张书宽郑萍佟诚德王明峤刘法亮
Owner HARBIN INST OF TECH
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