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Magnetic shoe for motor, motor rotor and motor

A motor rotor and magnetic tile technology, applied in the direction of magnetic circuit rotating parts, magnetic circuits, circuits, etc., can solve the problem of large axial magnetic pulling force, and achieve low production cost, improve performance, and reduce axial magnetic pulling force. Effect

Active Publication Date: 2021-08-03
GREE ELECTRIC APPLIANCES INC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention discloses a magnetic tile for a motor, a motor rotor, and a motor to at least solve the problem that the motor rotor is subject to a relatively large axial magnetic pull

Method used

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  • Magnetic shoe for motor, motor rotor and motor
  • Magnetic shoe for motor, motor rotor and motor
  • Magnetic shoe for motor, motor rotor and motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] In this embodiment, a magnetic shoe for a motor is provided, which is used for a permanent magnet motor in which a rotor core and a stator core are offset along the rotor axial direction. The motor includes a motor rotor and a stator, and the magnetic tile includes:

[0052] The excitation part is covered on the outer peripheral surface of the rotor core, and cooperates with the stator air gap to form an excitation circuit;

[0053] The dislocation part is formed on the first end surface of the excitation part, and the dislocation part on the end side protrudes from the end surface of the stator core and the end surface of the rotor core on the same side to form a dislocation arrangement with the stator core and the rotor core, The dislocation part includes: an induction part for being sensed by the rotor position sensing element of the motor; and a magnetic bridge for connecting the induction part and the excitation part to stagger the induction part and the excitation...

Embodiment 2

[0063] In this embodiment, a motor rotor is provided, and the motor rotor includes: a rotor; and a plurality of magnetic tiles coated on the outside of the rotor, and any one of the above-mentioned magnetic tiles is used for the magnetic tiles. That is, the rotor is surrounded by any of the above-mentioned "Z", "return" or "I" permanent magnet structures (magnetic tiles) into a circle. It should be noted that the proportion of each magnetic tile is determined according to the actual magnetic pole scheme (that is, the proportion of each magnetic tile is determined according to the actual magnetic pole 8P, 10P... scheme of the motor); this The structure realizes that after the stator and rotor iron cores are misplaced, compared with the existing permanent magnet structure, the axial magnetic pulling force of the permanent magnet structure of the present invention is greatly reduced, and the effect is obvious. In the case that other performances of the motor are not greatly affec...

Embodiment 3

[0065] In this embodiment, a motor is provided, and the motor includes the above-mentioned motor rotor or magnetic tile. Since the stator and rotor of the motor are placed asymmetrically, the permanent magnets of the motor rotor in this embodiment adopt a "Z" type, "back" type or "I" type structure, and the rotor is molded by using multiple pieces of permanent magnets with the same structure. The magnitude of the axial magnetic pull is greatly reduced, which solves the problem that the axial magnetic pull of the motor rotor causes the bearing and wave pad to be stressed for a long time, and the performance and life of the motor are seriously affected.

[0066] The "Z" type, "back" type or "I" type structure adopted by the permanent magnet of the present invention, the asymmetrical part of the permanent magnet relative to the stator core and the outer contour of the excitation part of the air gap all adopt the same three-section arc The structure solves the problem of excessive...

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PUM

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Abstract

The invention discloses a magnetic shoe which is used for a permanent magnet motor with a rotor core and a stator core arranged in a staggered manner along the axial direction of a rotor, and the magnetic shoe comprises an excitation part which covers the outer peripheral surface of the rotor core and is matched with a stator air gap to form an excitation loop; a dislocation part, formed on the first end face of the excitation part, and the end side dislocation part protruding out of the end face of the stator iron core and the end face of the rotor iron core on the same side so as to be staggered with the stator iron core and the rotor iron core; the dislocation part comprising a sensing part used for being sensed by a rotor position sensing element of the motor; and a magnetic bridge, used for connecting the induction part and the excitation part.

Description

technical field [0001] The invention relates to the technical field related to motors, in particular to a magnetic tile for a motor, a motor rotor and a motor. Background technique [0002] At present, with the development of motor technology, the current motor has an iron shell structure and a plastic seal structure. Among them, the built-in sensory control motor cannot sense the rotor position due to the insufficient distance between the rotor position sensing element and the surface-mounted permanent magnet, so it is often necessary to displace the rotor and the stator, such as figure 1 As shown, the misalignment distance between the stator 1 and the rotor 2 is L1 (according to the actual situation), so that the distance between the permanent magnet on the rotor and the position sensing element 3 on the control board is sufficient; at the same time, after the asymmetrical placement, the height of the permanent magnet needs to be Higher than the stator and rotor core, so ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/27H01F7/02
CPCH02K1/274H01F7/021H02K2201/06H02K2213/03
Inventor 李刚纪泽轩郭一星丁佳婷刘丽刚毛鑫
Owner GREE ELECTRIC APPLIANCES INC
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