GB2466090A

GB2466090A - Interconnecting concentrated stator windings

Info

Publication number: GB2466090A
Application number: GB0912054A
Authority: GB
Inventors: Xu Zhang
Original assignee: Zhongshan Broad Ocean Motor Co Ltd
Current assignee: Zhongshan Broad Ocean Motor Co Ltd
Priority date: 2008-12-12
Filing date: 2009-07-13
Publication date: 2010-06-16
Also published as: GB0912054D0

Abstract

The invention discloses a stator, comprising a stator core from which a plurality of teeth 7 protrude and define slots there between, a concentrated winding being received in the slots around each tooth, and an insulating structure 5 being disposed on the surface of the stator core and teeth, wherein a plurality of cylindrical posts 6 are disposed on the insulating structure. There are two posts per tooth and between each post is a wall 9 which supports part of the conductor connecting the coils, said walls being of differing heights such that the interconnecting conductors between coils of the same phase are routed so that they do not interfere with conductors of a different phase thus preventing damage during winding and reduced insulation reliability between phases. Figs 4 an 5 show an unrolled view of the stator and the winding layout which show the circumferential disposition of the connecting conductors of each phase being at a different distance from the core surface.

Description

STATOR AND WIRE WINDING METHOD THEREFOR

Description

[0001] The invention relates to a stator technology field, and particularly to a stator and a wire winding method therefor.

[0002] Stators comprise a stator core, an insulating plate, and a plurality of windings.

The stator core comprises a plurality of teeth and slots formed between adjacent teeth.

Conventionally, most of the windings are directly wrapped on the teeth of the stator core. With rapid development of modem stator technology, people have invented some new stator cores and wire winding methods applied on windings thereof.

[0003] China patent CN02121538.3 discloses a wire winding method for a winding a stator in background thereof A stator core of the invention comprises a plurality of teeth, a plurality of connecting portions is disposed between adjacent teeth, and a plurality of protruding portions and concave portions are disposed on the connecting portions. The invention employs a method of directly wrapping and passing transition wires around and through the connecting portions. The wire winding method is better than a direct wire winding method. However, a problem that transition lines often intersect each other in three-dimensional space in the case of a three-phase winding cannot be avoided, and transition lines of different windings overlap with each other and affect each other, which is confused, makes winding inconvenient, often causes transition wires to break, and reduces reliability of insulation between phases.

[0004] In view of the above-described problems, it is one objective of the invention to provide a stator having cylinders and supporting mechanisms disposed on the cylinders that enables anti-phase windings not to intersect each other in three-dimensional space, and thus features high insulation reliability, a simple structure, convenient winding and improved production efficiency.

[0005] The objective is achieved as follows.

[0006] A stator, comprising a stator core, a plurality of windings and an insulating plate, a plurality of teeth protruding from the stator core, the winding being received in the slot and wrapping around the tooth, and the insulating plate being disposed on the surface of the stator core, wherein a plurality of cylinders is disposed on the insulating plate, a transition line of an in-phase winding between two adjacent teeth is hang on the cylinder; and a plurality of supporting mechanisms is disposed on the cylinder.

[0007] The supporting mechanism comprises a plurality of protruding portions disposed between adjacent cylinders, the transition line is supported by the top of the protruding portion, and the protruding portions have different heights so that transition lines of anti-phase windings stagger and do not intersect each other in space.

[0008] The cross-section of the cylinder is circular, runway-shaped, semi-circular, or trapezoidal.

[0009] The number of the cylinders is twice that of the slots.

[0010] The windings are enameled copper coils or enameled aluminum coils.

[0011] The protruding portion is plate-shaped, and the cylinder is higher than the protruding portion.

[0012] Advantages of the stator of the invention over the prior art comprise: by way of the transition lines hang on the cylinders and the protruding portions having different heights and disposed between the cylinders, the transition lines of anti-phase windings stagger and do not intersect each other in space and effective insulation is implemented. Moreover, transition lines are regularly arranged, which facilitates rapid and convenient winding for wire winding devices.

[0013] It is another objective of the invention to provide a wire winding method of a stator that features staggering and non-intersecting transition lines, and thus rapid and convenient winding for wire winding devices.

[0014] A wire winding method for a stator winding, comprising hanging transition lines of the winding between two adjacent teeth on cylinders on an insulating plate, and defining a plurality of protruding portions with different heights between the cylinders so that transition lines of anti-phase windings stagger and do not intersect each other in space.

[0015] Transition lines of anti-phase windings have good insulating property, and the transition lines are disposed on one side of the stator, and thus rapid and convenient winding for wire winding devices is implemented.

[0016] FIG. 1 is a cross-sectional view of a motor comprising a stator of the invention; [0017] FIG. 2 is a schematic diagram of a stator of the invention; [0018] FIG. 3 is an enlarged view taken from line A-A in FIG. 1; [0019] FIG. 4 illustrates cylinder and protruding portions of the invention; and [0020] FIG. 5 is illustrates a wire winding method of the invention.

[0021] Detailed description will be given below in conjunction with specific embodiments and with reference to accompanying drawings.

[0022] As shown in FIG. 1, a motor using a stator of the invention comprises a stator 1 and a rotor 2. As shown in FIGS. 2 and 3, the stator 1 comprises a stator core 3, a plurality of windings 4 and an insulating plate 5. A plurality of teeth 7 protrudes from the stator core. The winding 4 is received in a slot 8 and wraps around the tooth 7.

The insulating plate 5 is disposed on the surface of the stator core 3. A plurality of cylinders 6 is disposed on the insulating plate 5. A transition line of an in-phase winding between two adjacent teeth 6 is hang on the cylinder 6. A plurality of supporting mechanisms is disposed on the cylinders 6. The supporting mechanism comprises a plurality of protruding portions 9 disposed between adjacent cylinders 6.

The transition line is supported by the top of the protruding portion 9. The protruding portions 9 have different heights so that the transition lines of the anti-phase windings 4 stagger and do not intersect each other in space and thus effective insulation is implemented. Moreover, the transition lines are disposed on one side of the stator, and thus rapid and convenient winding for wire winding devices is implemented. The cross-section of the cylinder 6 is circular, runway-shaped, semi-circular, or trapezoidal.

The number of the cylinders 6 is twice than that of the slots 8. The protruding portion 9 is plate-shaped. The cylinder 6 is higher than the protruding portion 9. As shown in FIGS. 4 and 5, when 36 teeth 7 are unfolded, the transition lines of three phase winding U, V and W stagger in height.

[0023] A wire winding method of the invention comprises hanging transition lines of the winding 4 between two adjacent teeth 7 on cylinders 6 on an insulating plate 5, and defining a plurality of protruding portions 9 with different heights between the cylinders 6 so that transition lines of anti-phase windings stagger and do not intersect each other in space. Compared with conventional wire winding methods, the invention solves a problem with the prior art that transition lines intersecting each other in three-dimensional space cause the transition lines to break and insulating reliability is reduced.

[0024] The above-mentioned embodiments are preferred embodiments of the invention, but this invention is not to be limited to this. Any amendment, modification, replacement, combination and simplification are equivalent replacements without departing from the spirit and essence of the invention and are intended to be included within the scope of the invention.

Claims

STATOR AND WIRE WINDING METHOD THEREFORClaims: 1. A stator, comprising a stator core, a plurality of windings and an insulating plate, a plurality of teeth protruding from said stator core, said winding being received in said slot and wrapping around said tooth, and said insulating plate being disposed on the surface of said stator core, wherein a plurality of cylinders is disposed on said insulating plate, a transition line of an in-phase winding between two adjacent teeth is hang on said cylinder; and a plurality of supporting mechanisms is disposed on said cylinder.
2. The stator of claim 1, wherein said supporting mechanism comprises a plurality of protruding portions disposed between adjacent cylinders, said transition line is supported by the top of said protruding portion, and said protruding portions have different heights so that transition lines of anti-phase windings stagger and do not intersect each other in space.
3. The stator of claim 1 or 2, wherein the cross-section of said cylinder is circular, runway-shaped, semi-circular, or trapezoidal.
4. The stator of claim 1 or 2, wherein the number of said cylinders is twice that of said slots.
5. The stator of claim 1 or 2, wherein said protruding portion is plate-shaped.
6. The stator of claim 1 or 2, wherein said cylinder is higher than said protruding portion.
7. The stator of claim 1 or 2, wherein said windings are enameled copper coils or enameled aluminum coils.
8. A wire winding method for a stator winding, comprising hanging transition lines of said winding between two adjacent teeth on cylinders on an insulating plate, and defining a plurality of protruding portions with different heights between said cylinders so that transition lines of anti-phase windings stagger and do not intersect each other in space.