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Brushless motor

A technology of brushless motors and stators, which is applied to the power supply of auxiliary motors, synchronous machines, electromechanical devices, etc., which can solve the problems of the space occupied by winding materials, and achieve the effects of material saving, small length and space saving

Inactive Publication Date: 2017-04-05
JOHNSON ELECTRIC SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, more stator teeth consume more winding material and take up more space, which is often a limitation in some applications

Method used

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  • Brushless motor
  • Brushless motor
  • Brushless motor

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0043] refer to image 3 , the brushless motor in this embodiment is a single-phase brushless motor, and the stator core 101 includes a yoke 103 , two opposing main salient poles 104 and two opposing auxiliary salient poles 105 . The yoke 103 is a closed frame-shaped yoke, including arc-shaped sidewalls 103 a connected to the two main salient poles 104 and straight sidewalls 103 b connected to the two auxiliary salient poles 105 . The two curved sidewalls 103a and the two straight sidewalls 103b are integrally formed to facilitate manufacture. Of course, the two curved sidewalls 103a and the two straight sidewalls 103b can also be discretely shaped.

[0044] In this embodiment, the main salient pole 104 and the arc-shaped sidewall 103a are discretely formed. The connection between the main salient pole 104 and the arc-shaped side wall 103a is provided with a concave-convex buckle structure, and the concave-convex snap-in structure is a dovetail tenon 121 arranged on the radi...

no. 2 example

[0057] refer to Figure 7 , the main difference between this embodiment and the first embodiment is that the two main pole pieces 104a, 104b of each main salient pole 104, the two auxiliary pole pieces 105a, 105b of each auxiliary salient pole 105 and the rotor 200 Air gaps 107 of symmetrical uniform thickness are respectively formed.

[0058] Specifically, the pole surface of the main pole piece 104a on the first side and the pole surface of the main pole piece 104b on the second side of each main salient pole 104 are symmetrical to each other, and the pole surface of the main pole piece 104a on the first side, the pole surface on the second side The pole surfaces of the main pole piece 104b on the two sides are concentric with the outer peripheral surface of the rotor 200, that is, the center of the circle corresponding to the pole surface of the main pole piece 104a on the first side and the pole surface of the main pole piece 104b on the second side is the same as that of ...

no. 3 example

[0063] refer to Figure 10 , the main difference between this embodiment and the second embodiment is that in each main salient pole 104, the notch formed between the main pole shoe 104a on the first side and the auxiliary pole shoe 105b of the adjacent auxiliary salient pole 105 106 is biased toward the auxiliary salient pole 105 along the direction away from the main salient pole 104, and the center of the notch 106 formed between the main pole shoe 104b on the second side and the auxiliary pole shoe 105a of the adjacent auxiliary salient pole 105 is along the The direction close to the main salient pole 104 is biased toward the main salient pole 104 .

[0064] An asymmetric air gap 107 of uniform thickness is formed between the two main pole pieces 104 a , 104 b of each main salient pole 104 , the two auxiliary pole pieces 105 a , 105 b of each auxiliary salient pole 105 , and the rotor 200 .

[0065] Specifically, the pole surface length of the main pole piece 104a on the...

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Abstract

The invention relates to a brushless motor including a stator and a rotor rotating relative to the stator. The stator includes a stator magnetic core and a winding, the stator magnetic core includes a yoke portion and two opposing main salient poles connected to the yoke portion, the winding winds round the two main salient poles, the stator magnetic core further includes two opposing auxiliary salient poles connected to the yoke portion, the auxiliary salient poles are not provided with the winding, the main salient poles and the auxiliary salient poles are alternatively arranged, and the rotor is arranged in a space enclosed by the pole shoes of the main salient poles and auxiliary salient poles and has air gaps away from the main salient poles and the auxiliary salient poles. the air gaps corresponding to the two main pole shoes of each main salient pole are asymmetrical, and the air gaps corresponding to the two auxiliary pole shoes of each auxiliary salient pole are asymmetrical. The auxiliary salient poles of the motor are sensed by the adjacent main salient poles to be opposite poles, and the auxiliary salient poles are not provided with the winding, so that materials can be saved, and meanwhile, the length of the auxiliary salient poles is small, so that the space can be saved.

Description

[0001] 【Technical field】 [0002] The invention relates to the technical field of motors, in particular to a brushless motor. [0003] 【Background technique】 [0004] Brushless motors are widely used because of their compact size, high reliability, long service life, and low noise. The stator of the brushless motor includes an iron core with a number of stator teeth and a number of windings respectively wound on the stator teeth. Generally, for a motor with a certain size, the more stator teeth there are, the shorter the magnetic path between adjacent stator teeth is, and the corresponding motor has smaller ferromagnetic loss and higher energy conversion efficiency during operation. However, the more stator teeth, the more winding material is consumed and the more space is occupied, which is often limited in some applications. [0005] In view of this, it is necessary to provide a motor with a relatively small volume for the brushless motor. [0006] 【Content of invention】 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K29/00H02K1/14H02K1/27
CPCH02K1/146H02K1/148H02K1/276H02K29/00H02K1/14H02K1/141H02K21/14H02K3/28H02K1/145H02K1/278H02K21/145H02K21/16H02K2213/03H02K2201/03H02K7/1166H02K3/521E05F15/697B60L1/003E05Y2900/55H02K1/2706H02K3/18H02K7/06
Inventor 李越周垂有王勇李勇
Owner JOHNSON ELECTRIC SHENZHEN