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Single-phase permanent magnet motor

A single-phase permanent magnet motor and permanent magnet pole technology, applied to synchronous motors with stationary armatures and rotating magnets, magnetic circuits, electric components, etc., can solve the problems of vibration and noise, poor starting reliability, and small positioning and starting angles And other problems, to achieve the effect of reducing the dead point of starting, enhancing the reliability of starting, and smooth starting and rotation

Inactive Publication Date: 2017-03-08
JOHNSON ELECTRIC SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The single-phase permanent magnet motor with this structure, due to the existence of the notch, will cause the motor to generate a large positioning torque, resulting in vibration and noise
Moreover, restricted by the notch, the positioning start angle is small, and the start reliability is poor

Method used

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  • Single-phase permanent magnet motor

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0034] see Figure 1 to Figure 5 , a single-phase permanent magnet motor 10 in a preferred embodiment of the present invention includes a stator 20 and a rotor 50 that rotates relative to the stator. The stator 20 includes a cylindrical shell 21 with an open end, an end cover 23 mounted to the open end of the shell 21, a stator core 30 mounted in the shell 21, an insulating wire frame 40 mounted to the stator core 30 and wound around the stator core. Winding 39 on core 30 and supported by insulating wire frame 40 . Wherein, the stator core 30 includes an outer ring portion 31, a plurality of tooth bodies 33 protruding inwardly from the outer ring portion 31, a pole piece 35 protruding from the radial end of each tooth body 33 to two sides, and a winding 39 Winding on the corresponding tooth body 33 , the winding 39 is isolated from the stator core 30 by the insulating wire frame 40 .

[0035] The rotor 50 is accommodated in the space surrounded by the pole pieces 35 of the t...

no. 2 example

[0045] Please refer to Figure 7 , and the difference from the previous embodiment is that in order to improve the winding efficiency of the winding 39, the stator core 30 is spliced ​​by several core assemblies 300 along the circumferential direction of the stator, and each core assembly 300 includes an arc-shaped yoke portion 300b 1. The tooth body 33 protrudes from the arc-shaped yoke portion 300b, and the pole piece 35 protrudes from the radial end of the tooth body 33 to both sides in the circumferential direction. In this embodiment, each magnetic core assembly 300 has a tooth body 33 and a corresponding pole piece 35 . Understandably, each magnetic core assembly may also have more than one tooth body 33 and corresponding pole pieces 35 . After the winding of each magnetic core assembly is completed, the several magnetic core assemblies 300 are spliced ​​together to obtain the stator core 30 with stator windings.

[0046] Concave-convex structures are provided at joint...

no. 3 example

[0049] Please refer to Figure 8 , different from the second embodiment, in this embodiment, the joints of the arc-shaped yokes of adjacent magnetic core components are planes, and at this time, the joints of the arc-shaped yokes can be welded together by welding .

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Abstract

The invention discloses a single-phase permanent magnet motor. The single-phase permanent magnet motor comprises a stator and a rotor which can rotate relative to the stator, wherein the stator comprises a stator magnetic core and a winding which is wound around the stator magnetic core; the stator magnetic core comprises an outer ring part, multiple tooth bodies which extend from the outer ring part to the inner side, and pole shoes which extend from the tail end of each tooth body to two sides circumferentially, wherein the rotor is accommodated in a space formed by the pole shoes in a surrounding manner; the rotor comprise multiple permanent magnetic poles arranged in the circumferential direction of the rotor; and the distances from the outer side surface of each permanent magnet pole to the rotor axis are gradually decreased from the circumferential center to the circumferential two sides, so that non-uniform air gaps, which are symmetrical around the middle line of the permanent magnetic poles, are formed between the outer side surfaces of the permanent magnetic poles and the inner circumferential surfaces of the pole shoes. By adoption of the single-phase permanent magnet motor, the starting reliability is improved, and starting dead points are reduced.

Description

technical field [0001] The invention relates to a single-phase permanent magnet motor, in particular to a single-phase permanent magnet motor with slots. Background technique [0002] The motor stator core of the single-phase permanent magnet motor in the prior art adopts an integral structure, that is, the outer ring portion and the tooth portion of the stator core are formed into an integrated structure at the same time, and slots are provided between the pole shoes of adjacent tooth portions to facilitate for winding. For the single-phase permanent magnet motor with this structure, the existence of the notch will cause the motor to generate a large positioning torque, thereby generating vibration and noise. Moreover, restricted by the notch, the positioning starting angle is small, and the starting reliability is poor. [0003] In view of this, the present invention aims to provide a novel single-phase permanent magnet motor capable of improving starting reliability. ...

Claims

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Application Information

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IPC IPC(8): H02K1/12H02K1/22
CPCH02K1/12H02K1/14H02K1/146H02K1/22H02K1/278H02K21/16H02K2201/03
Inventor 李越周垂有王勇李勇
Owner JOHNSON ELECTRIC SHENZHEN
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