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Magnetic increase built-in V-shaped adjustable flux motor

A magnetic flux motor and magnetic technology, applied in the direction of magnetic circuit shape/style/structure, magnetic circuit, electrical components, etc., can solve the problems of uncontrollable demagnetization of alnico permanent magnets, etc., to ensure stability, controllability, change Air-gap flux, risk reduction effect

Active Publication Date: 2016-08-31
黑龙江省工研院资产经营管理有限公司
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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 problem of uncontrollable demagnetization of AlNiCo permanent magnets prone to occur in high-load operation of a field-weakening adjustable flux motor, and at the same time reduce the difficulty of accurately adjusting the magnetization of AlNiCo permanent magnets online, and provide a This type uses both AlNiCo permanent magnets and NdFeB permanent magnets, and the quadrature axis reactance Lq is smaller than the direct axis reactance Ld, that is, the magnetization adjustable flux motor

Method used

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specific Embodiment approach 1

[0018] Specific implementation mode one: the following combination Figure 1 to Figure 3 This embodiment is described. The magnetized built-in V-type adjustable flux motor described in this embodiment includes a stator, a rotor, and a rotating shaft. The stator includes a stator core 1 and an armature winding 2. The armature winding 2 is arranged on the winding of the stator core 1. In the groove, the rotating shaft 9 is made of cast steel, the stator and the rotating shaft 9 are the same as the conventional permanent magnet synchronous motor; the rotor includes a permanent magnet slot, NdFeB magnetic pole 5, AlNiCo magnetic pole 6, magnetic bridge 7 and quadrature axis magnetic barrier 8. The rotor is alternately and uniformly arranged with V-shaped permanent magnet slots 4 and quadrature-axis magnetic barriers 8 along the circumferential direction. Both the V-shaped permanent magnet slots 4 and the quadrature-axis magnetic barriers 8 run through the entire motor in the axial ...

Embodiment 1

[0021] to combine figure 1 To illustrate this embodiment, the magnetization-increased built-in V-type adjustable flux motor includes a stator, a rotor, and a rotating shaft. The stator in the present invention includes a stator core 1 and an armature winding 2. The armature winding 2 is arranged in the slot of the stator iron core, and the rotating shaft 9 is made of cast steel. The stator and shaft 9 are the same as those of conventional permanent magnet synchronous motors; V-shaped permanent magnet slots 4 and quadrature-axis magnetic barriers 8 are alternately and uniformly arranged along the circumferential direction. Both V-shaped permanent magnet slots 4 and quadrature-axis magnetic barriers 8 run through the entire motor in the axial direction. V-shaped permanent magnet slots 4 have two rectangular installations. In each rectangular slot, a set of NdFeB magnetic poles 5 and AlNiCo magnetic poles 6 are set respectively. The magnetization direction of the boron magnetic ...

Embodiment 2

[0023] to combine figure 2 Note that the difference between this embodiment and Embodiment 1 is that the quadrature-axis magnetic barrier 8 is a long strip-shaped groove arranged radially along the motor, with smooth ends at both ends, and its interior can also be made of non-magnetically conductive epoxy resin, carbon fiber, etc. , Non-conductive material filling.

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Abstract

The invention provides a magnetic increase built-in V-shaped adjustable flux motor, belongs to the field of permanent magnet motors, and aims at solving the problem of uncontrolled demagnetization of an aluminum-nickel-cobalt permanent magnet when a weak-magnetic adjustable flux motor runs under a high load. According to the scheme, the magnetic increase built-in V-shaped adjustable flux motor comprises a stator core, armature windings, a rotor core, a rotating shaft, V-shaped permanent magnet slots, neodymium-iron-boron magnetic poles, aluminum-nickel-cobalt magnetic poles, magnetic bridges and quadrature axis magnetic barriers, wherein the rotor core is fixed on the rotating shaft and is located in the stator core; the armature windings are arranged on the stator core; the V-shaped permanent magnet slots and the quadrature axis magnetic barriers are alternately and evenly arranged on the rotor core along the circumferential direction, and run through the overall rotor core along the axial direction; each V-shaped permanent magnet slot comprises two rectangular mounting slots; a group of neodymium-iron-boron magnetic poles and aluminum-nickel-cobalt magnetic poles are arranged in each rectangular mounting slot; the neodymium-iron-boron magnetic poles are arranged at the middle part of each V-shaped slot; and the aluminum-nickel-cobalt magnetic poles are arranged at two ends of each V-shaped slot.

Description

technical field [0001] The invention belongs to the field of permanent magnet motors. Background technique [0002] In order to overcome the problems that the direct axis component of the armature current increases, the quadrature axis component decreases, the copper loss increases, and the electromagnetic torque of the motor decreases rapidly when the traditional rare earth permanent magnet motor is running at a weak field speed. The adjustable magnetic flux memory motor with coercive force AlNiCo permanent magnet came into being. When the motor is running, the air gap flux density of the permanent magnet motor is adjusted by applying the direct axis charge and demagnetization pulse current, thereby expanding the speed regulation range of the motor. . However, the quadrature-axis reactance Lq of this type of motor is often greater than the direct-axis reactance Ld during design. When the motor is running at high load, it needs a negative direct-axis current component to ge...

Claims

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Application Information

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IPC IPC(8): H02K1/27
CPCH02K1/276
Inventor 郑萍张书宽王伟男程路明刘家琦马晓宁
Owner 黑龙江省工研院资产经营管理有限公司
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