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Permanent magnet motor rotor capable of automatic weaking magnet following rotation speed

A permanent magnet motor and automatic technology, applied in the direction of magnetic circuit rotating parts, magnetic circuit shape/style/structure, etc., can solve the problems of large rotor flux leakage, system efficiency drop, low torque, etc., to reduce magnetic flux leakage , Improve utilization efficiency, improve the effect of torque

Inactive Publication Date: 2006-08-23
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the rotor with this structure has more magnetic flux leakage, and the torque is low at low speed; while at high speed, it needs to perform field weakening control, so the system efficiency decreases in the high speed area

Method used

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  • Permanent magnet motor rotor capable of automatic weaking magnet following rotation speed
  • Permanent magnet motor rotor capable of automatic weaking magnet following rotation speed
  • Permanent magnet motor rotor capable of automatic weaking magnet following rotation speed

Examples

Experimental program
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Effect test

specific Embodiment approach 1

[0006] Specific implementation mode one: the following combination figure 1 This embodiment will be specifically described. It consists of a rotor core 1, several main pole permanent magnets 3, and several auxiliary permanent magnets 4. The rotor core 1 is cylindrical, and there is a shaft hole 6 for assembling the rotating shaft at the center of the rotor core 1. Several radial chutes 9 are distributed, and each radial chute 9 is inlaid with a main pole permanent magnet 3 and the main pole permanent magnet 3 is shorter than the length of the radial chute 9, and the outer surface of the radial chute 9 An auxiliary permanent magnet 4 is fixed at the end, and both the main pole permanent magnet 3 and the auxiliary permanent magnet 4 are tangentially magnetized and the magnetization direction of the main pole permanent magnet 3 and the auxiliary permanent magnet 4 in the same radial chute 9 is the same , the adjacent side surfaces of the two adjacent main pole permanent magnets...

specific Embodiment approach 2

[0007] Specific implementation mode two: the following combination figure 1 This embodiment will be specifically described. There is a magnetic isolation groove 2 on both sides of the radial chute 9, two magnetic isolation grooves 2 take the radial chute 9 as the symmetrical center, and the magnetic isolation groove 2 is opened at the outer end of the radial chute 9 . Other components and connections are the same as those in Embodiment 1. In this embodiment, "the reluctance of the rotor core 1 at the inner end of the radial chute 9 is smaller than the reluctance of the rotor core 1 at the outer end of the radial chute 9" is realized by separating the magnetic slot 2, the structure is simple, and the process is easy to realize . The function of the magnetic isolation groove 2 is to reduce the magnetic flux sent by the main pole permanent magnet 3 when the main pole permanent magnet 3 moves outwards into its position, so its size and shape are not unique, and can be rectangu...

specific Embodiment approach 3

[0008] Specific implementation mode three: the following combination figure 2 This embodiment will be specifically described. The difference between this embodiment and the second embodiment is that it also includes a non-magnetically conductive plate 8 , which is arranged on both sides of the radial chute 9 and located at the outer end of the radial chute 9 . In this embodiment, "the reluctance of the rotor core 1 at the inner end of the radial chute 9 is smaller than the reluctance of the rotor core 1 at the outer end of the radial chute 9" is realized by setting the non-magnetic conductive plate 8, and the two non-magnetic conductive plates 8 is also equivalent to the auxiliary slideway of the main pole permanent magnet 3, so that the main pole permanent magnet 3 can slide smoothly in the radial slide groove 9. Other compositions and connections are the same as those in Embodiment 2.

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Abstract

Present invention relates to a automatically magnetic weakening permanent-magnet machine rotor for raising motor slow speed torque and high-speed efficiency, and widening motor speed adjustable range. It contains rotor core, number of main pole permanent magnets, number of auxiliary permanent magnet, radial sliding chute, and auxiliary permanent magnet. Said invention can be used in permanent magnet motor and permanent magnet generator.

Description

technical field [0001] The invention relates to a permanent magnet motor rotor capable of automatically weakening the magnetic field. Background technique [0002] The traditional tangentially magnetized permanent magnet synchronous motor rotor is to embed the main pole permanent magnet directly into the rotor core slot, and its structure is as follows: Figure 5 As shown, the air-gap flux density of the motor with this rotor structure is high, the power density of the motor is large, and it is easy to realize field-weakening control, and is suitable for fields requiring a large operating range of constant power. However, the rotor with this structure has more flux leakage, and the torque is low at low speed; while at high speed, field weakening control is required, so the system efficiency decreases in the high speed region. Contents of the invention [0003] The purpose of the present invention is to provide a permanent magnet motor rotor that can automatically weaken th...

Claims

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Application Information

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IPC IPC(8): H02K1/27H02K1/28
Inventor 寇宝泉李春艳李立毅谢大纲程树康
Owner HARBIN INST OF TECH
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