CN-224204833-U - Motor stator

CN224204833UCN 224204833 UCN224204833 UCN 224204833UCN-224204833-U

Abstract

A motor stator is provided that includes a plurality of stator teeth. Each of the plurality of stator teeth includes a tooth portion, an inboard end portion, and an outboard end portion. The tooth part extends along the first direction and is assembled for winding. The first direction is perpendicular to the circumferential direction. The inner end is connected with the inner end of the tooth part and protrudes outwards from two opposite sides of the inner end. The outer end portion is connected with the outer end of the tooth portion and comprises an outer body and two outer extension end portions. The outer body protrudes outwards from two opposite sides of the outer end respectively. The two outer extending end parts are respectively arranged on two opposite sides of the outer body. The outer body includes a first inner face. The first inner surface faces the inner end and is connected between the tooth portion and the outer extending end. The outer extending end part protrudes along the circumferential direction, and forms a first width smaller than the wire diameter of the winding wire relative to the first inner surface.

Inventors

XIAO ZIHAN
KE ZHONGGUANG
WANG TINGJUN
LI YINGHUI
XU YONGZHI

Assignees

台达电子工业股份有限公司

Dates

Publication Date: 20260505
Application Date: 20250428

Claims (13)

1. A motor stator comprising a plurality of stator teeth, wherein each of the plurality of stator teeth comprises: A tooth part extending along a first direction and having an inner end and an outer end opposite to each other, and assembled for winding a wire, wherein the first direction is perpendicular to a circumferential direction; an inner end portion connected to the inner end of the tooth portion and protruding outwardly from two opposite sides of the inner end, respectively, and The outer side end part is connected with the outer end of the tooth part and comprises an outer side body and two outer side extension end parts, wherein the outer side body protrudes outwards from two opposite sides of the outer end respectively, the tooth part is connected between the inner side end part and the outer side body, the two outer side extension end parts are respectively arranged on two opposite sides of the outer side body, the outer side body comprises a first inner face, the first inner face faces the inner side end part and is connected between the tooth part and the outer side extension end parts, the outer side extension end parts protrude outwards along the circumferential direction and form a first width relative to the first inner face, and the first width is smaller than a wire diameter of the winding.
2. The motor stator of claim 1 wherein the first width is one half of the wire diameter of the winding.
3. The motor stator of claim 1 wherein the first width is between 0.05mm and 1.50 mm.
4. The motor stator according to claim 1, wherein the inner end is a shoe, the outer end is a yoke, and the plurality of stator teeth are connected to each other by the outer end.
5. The motor stator according to claim 1, wherein the inner end is a yoke, the outer end is a shoe, and the plurality of stator teeth are connected to each other by the inner end.
6. The motor stator of claim 1 wherein the first inner face is a plane and perpendicular to the first direction.
7. The motor stator of claim 1, wherein a second width is provided between an outer circumferential surface of the motor stator and the first inner surface, and the second width increases from the opposite sides of the outer body toward the center.
8. The motor stator of claim 1, wherein the motor stator comprises N stator teeth, wherein N is 9, 12, 15, or 18.
9. The motor stator of claim 8 wherein the outer extension includes a second inner face facing the inner end, and wherein the first inner face and the second inner face have a first angle therebetween, wherein the first angle is less than 180 °.
10. A motor stator as claimed in claim 9, wherein the first angle = 180 ° - (360 °/2N).
11. The motor stator of claim 9, wherein a second width is provided between an outer peripheral surface of the motor stator and the first inner surface, a third width is provided between the outer peripheral surface and the second inner surface, and the third width is not greater than the second width.
12. The motor stator of claim 11, wherein the tooth has a fourth width, and the fourth width is between 1.8 times and 2.5 times the third width.
13. The motor stator of claim 1, wherein the motor stator includes an insulating layer disposed between the stator teeth and the windings.

Description

Motor stator Technical Field The present disclosure relates to a motor stator, and more particularly, to a motor stator with a slot formed inside a stator slot to provide additional winding space for increasing magnetic flux density. Background In the prior art motors, to facilitate the winding displacement, the slot type of the motor stator is usually designed with a flat bottom to ensure the winding arrangement. The yoke width of the motor stator is mainly dependent on the magnetic saturation conditions in the magnetic circuit design. In general, the region of minimum yoke width has the highest magnetic flux density and has a significant impact on the overall performance of the reluctance and motor. In the motor stator of the flat bottom design, as the yoke width increases, the magnetic flux density decreases, resulting in a decrease in the space utilization of the motor stator. However, excessive reduction of the yoke width also results in the occurrence of a magnetic saturation condition. In view of the foregoing, it is desirable to provide a motor stator with grooves formed inside the stator slots to provide additional winding space to increase magnetic flux density while avoiding the occurrence of magnetic saturation, so as to solve the drawbacks of the prior art. Disclosure of utility model An object of the present invention is to provide a motor stator with a groove formed inside a stator slot. Grooves are provided in the stator teeth, such as at the radially outer ends of the yoke or shoe, to increase stator slot space to facilitate additional winding. The width of the groove is approximately half of the wire diameter of the winding wire, for example, between 0.05mm and 1.50mm, and besides, extra winding wire arrangement can be added, so that the occurrence of magnetic saturation caused by the too narrow width of the outer end part is avoided. Another object of the present invention is to provide a motor stator with a groove formed inside the stator slot. The grooves are formed by two inner surface structures, and the inner surfaces close to the tooth parts are planes, so that the winding wires are orderly arranged, the winding wire arrangement quantity is increased, and the space utilization efficiency is improved. The width of the outer ends increases from the ends to the center. The inner surfaces of the grooves, which are close to the two ends of the outer end part, are approximately parallel to the outer peripheral surface of the motor stator, so that the width of the outer end part, which is close to the two ends, is approximately consistent, the magnetic flux density of the whole motor stator is increased, and the occurrence of the magnetic saturation condition is avoided. In addition, the tooth width in the stator teeth is more, for example, between 1.8 times and 2.5 times the minimum width of the outer end portion, so as to obtain an optimized magnetic flux density. In order to achieve the above-mentioned object, the present invention provides a motor stator, which includes a plurality of stator teeth. Each of the plurality of stator teeth includes a tooth portion, an inboard end portion, and an outboard end portion. The tooth part extends along the first direction and is provided with an inner end and an outer end which are opposite to each other, and is assembled and provided with a winding wire. The first direction is perpendicular to the circumferential direction. The inner end is connected with the inner end of the tooth part and protrudes outwards from two opposite sides of the inner end. The outer end portion is connected with the outer end of the tooth portion and comprises an outer body and two outer extension end portions. The outer body protrudes outwards from two opposite sides of the outer end respectively. The tooth part is connected between the inner side end part and the outer side body. The two outer extending end parts are respectively arranged on two opposite sides of the outer body. The outer body comprises a first inner face, wherein the first inner face faces the inner end part and is connected between the tooth part and the outer extending end part. The outer extending end part protrudes along the circumferential direction and forms a first width relative to the first inner face. The first width is smaller than the wire diameter of the winding wire. In one embodiment, the first width is one half of the wire diameter of the wire. In one embodiment, the first width is between 0.05mm and 1.50 mm. In one embodiment, the inboard end is a boot and the outboard end is a yoke. The plurality of stator teeth are connected to each other by outboard ends. In one embodiment, the inboard end is a yoke and the outboard end is a boot. The plurality of stator teeth are connected to each other by inboard ends. In one embodiment, the first inner face is planar and perpendicular to the first direction. In one embodiment, the motor stator has a second width between the outer circumferent