CN107681800A - A kind of machine winding - Google Patents

Abstract

A motor winding, comprising: a stator and a plurality of A-phase coils, B-phase coils and C-phase coils arranged on the stator overlapping each other, the A-phase coils, B-phase coils and C-phase coils overlap each other in pairs, and the A-phase Coils, B-phase coils and C-phase coils all include first-type coils and second-type coils. The angle of the first-type coils at the ends of the motor windings is kept parallel to the axial direction of the stator, and the second-type coils are opposite to each other at the ends of the motor windings. There is an inclination angle in the axial direction of the stator, and the inclination angle ensures that the second-type coils use the minimum length to bypass the adjacent first-type coils. In the present invention, only two coil modes are overlapped, and the two coils are overlapped in a compact manner at the end of the coil, which significantly reduces the length of the coil end, thereby reducing the winding material, reducing the cost and reducing the cost. Winding loss is reduced, generator efficiency is improved, space occupancy at the end of the winding is reduced, and the influence of the end winding on the cooling air duct is reduced.

Description

a motor winding

technical field

The invention relates to a motor winding.

Background technique

Figure 1 and Figure 2 show the structure of the end winding of a traditional permanent magnet direct drive wind turbine. The coils are arranged in the winding slots, and the two sides of the slot 2' are teeth 1', where every three coils form a group. The first coil 1-1', the second coil 1-2' and the third coil 1-3' respectively correspond to the three phases ABC. Because the adjacent slots are in different phases, the windings of the same phase must cross other windings of different phases. The three coils overlap at the end, and every three coils at the end of the winding need to avoid each other, so the three coils are designed separately. Different inclination angles make the end shapes of the three coils also different, which increases the length of the end windings accordingly, thereby increasing the winding material and winding loss, and reducing the efficiency of the generator.

Contents of the invention

The invention provides a motor winding, which only adopts two overlapping coil modes, and adopts a compact manner at the end of the coil to realize the overlapping winding of the two coils, which obviously reduces the length of the end of the coil, thereby reducing the winding material, While reducing the cost, the winding loss is also reduced, the efficiency of the generator is improved, the occupancy rate of the space at the end of the winding is reduced, and the influence of the end winding on the cooling air duct is reduced.

In order to achieve the above object, the present invention provides a motor winding, including: a stator and a plurality of A-phase coils, a plurality of B-phase coils and a plurality of C-phase coils arranged on the stator overlapping each other, the A-phase coils, B-phase coils and C-phase coils overlap each other in pairs, and the A-phase coils, B-phase coils and C-phase coils all include first-type coils and second-type coils respectively;

The first type of coil has an inclination angle at the end of the motor winding, which ensures that the first type of coil uses the minimum length to bypass the second type of coil adjacent to it; the second type of coil is in the motor winding The end portion has an inclination angle relative to the axial direction of the stator, and the inclination angle ensures that the coil of the second type bypasses the coil of the first type adjacent to it with a minimum length.

The stator includes a plurality of stator teeth and a plurality of grooves formed between the stator teeth, and the first type coils and the second type coils are arranged in the grooves.

There should be at least two grooves between the two grooves where the outlet end and the inlet end of each first-type coil are located, and the outlet or inlet end of a second-type coil is set in one of the spaced grooves , the outlet or inlet end of another second-type coil is set in another groove at the interval;

There should be at least two grooves between the two grooves where the outlet end and the inlet end of each second-type coil are located, and the outlet or inlet end of a first-type coil is set in one of the interval grooves , the outlet end or the inlet end of another first-type coil is arranged in another groove at intervals.

The first-type coils are close to the crossed-over second-type coils, keeping only a necessary safety distance from each other, and the second-type coils are also close to the crossed-over first-type coils, Keep only the necessary safe distance from each other.

According to the edge radian of the second type coil, the length of the multi-turn coil in the first type coil is set, so that the length of each turn coil can meet the requirement that the turn coil is close to the second type coil that is crossed, and only keep the necessary distance between each other. safe distance.

According to the edge radian of the first type coil, the length of the multi-turn coil in the second type coil is set, so that the length of each turn coil can meet the requirement that the turn coil is close to the first type coil that is crossed, and only keep the necessary distance between each other. safe distance.

Set the number of series coils of the A-phase coil, the number of series coils of the B-phase coil and the number of series coils of the C-phase coil in the motor winding to an even number to ensure the number of first-type coils and second-type coils in each phase coil equal.

In the present invention, only two coil modes are overlapped, and the two coils are overlapped in a compact way at the end of the coil, which obviously reduces the length of the coil end, thereby reducing the winding material, reducing the cost and reducing the cost. Winding loss is reduced, generator efficiency is improved, space occupancy at the end of the winding is reduced, and the influence of the end winding on the cooling air duct is reduced.

Description of drawings

Fig. 1 is a schematic structural diagram of a motor winding in the prior art.

FIG. 2 is a top view of FIG. 1 .

Fig. 3 is a structural schematic diagram of a motor winding provided by the present invention.

FIG. 4 is a top view of FIG. 3 .

FIG. 5 is a schematic cross-sectional view of FIG. 3 .

Fig. 6 is a schematic structural diagram of another embodiment of the present invention.

Fig. 7 is a schematic structural diagram of a third embodiment of the present invention.

detailed description

A preferred embodiment of the present invention will be described in detail below with reference to FIGS. 3 to 7 .

As shown in FIG. 3 and FIG. 4 , the present invention provides a motor winding, including: a stator 2 and a plurality of A-phase coils, a plurality of B-phase coils and a plurality of C-phase coils arranged on the stator 2 overlapping each other. The A-phase coils, B-phase coils and C-phase coils all include first-type coils 101 and second-type coils 102, that is, the first-type coils 101 can be set as A-phase coils, B-phase coils and For the C-phase coil, the second type of coil 102 can be configured as an A-phase coil, a B-phase coil, and a C-phase coil. A-phase coils, B-phase coils and C-phase coils overlap each other in pairs, that is, A-phase coils overlap with B-phase coils and C-phase coils respectively, B-phase coils overlap with A-phase coils and C-phase coils respectively, and C-phase coils overlap with A-phase coils and C-phase coils respectively. The phase coils overlap the A-phase coil and the B-phase coil, respectively.

The stator 2 includes a plurality of stator teeth 202 and a plurality of grooves 201 formed between the stator teeth 202 , and both the first type coils 101 and the second type coils 102 are disposed in the grooves 201 .

There should be at least two grooves between the two grooves 201 where the outlet end 101-1 and the inlet end 101-2 of each first type coil 101 are located, and the outlet end 102-1 of a second type coil 102 or The wire-in terminal 102-2 is arranged in one of the grooves at the interval, and the wire-out end 102-1 or the wire-in end 102-2 of the other second type coil 102 is arranged in the other groove at the interval, that is, each The first type of coil 101 should at least overlap with two second type of coils 102 .

There should be at least two grooves between the two grooves 201 where the wire outlet 102-1 and the wire inlet 102-2 of each second type coil 102 are located, and the wire outlet 101-1 of a first type coil 101 or The wire-in terminal 101-2 is set in one of the grooves at the interval, and the wire-out end 101-1 or the wire-in end 101-2 of the other first type coil 101 is set in the other groove at the interval, that is, each The second type of coil 102 should at least overlap with two first type of coils 101 .

The first type of coil 101 has an inclination angle at the end of the motor winding, and the inclination angle should be able to ensure that the first type of coil 101 uses the minimum length to bypass its adjacent second type of coil 102; The type coil 102 has an inclination angle at the end of the motor winding, and the inclination angle should ensure that the second type coil 102 bypasses the adjacent first type coil 101 with the minimum length.

In order to ensure that the minimum length is used to bypass adjacent coils, the first type of coil 101 is as close as possible to the second type of coil 102 that is straddled, and only a necessary safety distance is kept between each other (different types of motors) The safety distance is different), and the second type of coil 102 is also as close as possible to the first type of coil 101 that is straddled, and only a necessary safety distance is maintained between them. Because the angle of the second type of coil 102 at the end of the motor winding is changed relative to the angle of the coil in the groove, the second type of coil 102 is bent at the end of the motor winding, and the edge of the coil forms a radian. One type of coil 101 can be closely attached to the second type of coil 102, and the lengths of the multi-turn coils in the first type of coil 101 can be set to different lengths according to the edge radian of the second type of coil 102, so that each turn of the coil can be close to the A second type of coil 102 that is spanned. Because the angle of the first type of coil 101 at the end of the motor winding is changed relative to the angle of the coil in the groove, the first type of coil 101 is bent at the end of the motor winding, and the edge of the coil forms a radian. The second-type coil 102 can be close to the first-type coil 101, and the lengths of the multi-turn coils in the second-type coil 102 can be set to different lengths according to the edge curvature of the first-type coil 101, so that each turn of the coil can be close to the A first type of coil 101 that is spanned.

As shown in Figure 5, when the first type of coil 101 winds around the end of the second type of coil 102, the length of each turn of the coil is set to a different length, so that the cross-sectional height direction is arc-shaped, and can be close to the shortest distance. The second type of coil 102, and when the end of the second type of coil 102 turns to be parallel to the radial direction of the stator after the bending angle is turned, and then winds around the end of the first type of coil 101, the cross section of the second type of coil 102 at this time The height direction of the coil is parallel to the axial direction of the stator, and can be closely attached to the first type of coil 101 with the shortest distance.

When designing the motor winding, set the number of coils in series in each phase of the ABC three-phase motor to an even number, which can ensure that the number of the first type of coil and the second type of coil in each phase coil are equal, thus ensuring the motor three-phase Winding balance.

As shown in Figures 3 and 4, in one embodiment of the present invention, the first type of coil 101 and the second type of coil 102 are arranged overlapping each other, and each of the first type of coil 101 and the second type of coil 102 includes multiple turns Coils, the length of each turn of the coil in the second type of coil 102 is the same, when the first type of coil 101 is bypassed, the second type of coil 102 is close to the first type of coil 101, and the length of each turn of the coil in the first type of coil 101 is The length is also the same. When winding around the second type coil 102 , only a few turns at the bottom of the first type coil 101 are in close contact with the second type coil 102 , and the remaining turns are not in close contact with the second type coil 102 .

As shown in Fig. 3, Fig. 4 and Fig. 6, in another embodiment of the present invention, the first type of coil 101 and the second type of coil 102 are arranged overlapping each other, and the first type of coil 101 and the second type of coil 102 are both Respectively comprise multi-turn coils, the length of each turn coil in the second type coil 102 is the same, when the first type coil 101 is bypassed, the second type coil 102 is close to the first type coil 101, and the first type coil 101 The coils in are divided into several groups, each group of coils contains multiple turns of coils, the length of each turn of coils in each group of coils is the same, but the lengths of different groups of coils are different, and each group of coils is set according to the edge radian of the second type of coil 102 The length of each group of coils is guaranteed to be close to the second type of coils 102 .

Furthermore, the length of each turn of the coil in the first type of coil 101 can be set to a different length, and the length of each turn of the coil is set according to the shape of the second type of coil 102 that it bypasses, so that it can better Close to the second type of coil 102 .

As shown in Figure 7, in the third embodiment of the present invention, the first type of coil 101 and the second type of coil 102 are overlapped with each other, and the first type of coil 101 and the second type of coil 102 each include a multi-turn coil , the coils in the second type of coils 102 are divided into several groups, each group of coils includes multiple turns of coils, the length of each turn of coils in each group of coils is the same, but the lengths of different groups of coils are different, according to the first type of coils 101 Edge radians are used to set the length of the group coils to ensure that each group of coils is close to the first type of coil 101. At the same time, the length of each turn of the first type of coil 101 is set to a different length. The length of each turn of the coil is according to The shape of the second-type coil 102 that it bypasses is set so that it can better cling to the second-type coil 102 .

Furthermore, the length of each turn of the coil in the second type of coil 102 can also be set to a different length, and the length of each turn of the coil is set according to the shape of the first type of coil 101 that it bypasses, so that it can better The ground is close to the first type of coil 101 .

The motor winding provided by the present invention only adopts two overlapping coil modes, and adopts a compact method at the end of the coil to realize the overlapping winding of the two coils, which obviously reduces the length of the end of the coil, thereby reducing the winding material and reducing the cost At the same time, it also reduces the winding loss, improves the efficiency of the generator, and also reduces the occupancy rate of the space at the end of the winding, reducing the impact of the end winding on the cooling air duct.

Although the content of the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description should not be considered as limiting the present invention. Various modifications and alterations to the present invention will become apparent to those skilled in the art upon reading the above disclosure. Therefore, the protection scope of the present invention should be defined by the appended claims.

Claims (7)

1. a kind of machine winding, it is characterised in that include：Stator and the mutually overlapping multiple A phase coils being arranged on stator, Multiple B phase coils and multiple C phase coils, described A phase coils, B phase coils and C phase coils mutually overlap two-by-two, described A phases Coil, B phase coils and C phase coils all include first kind coil and the second class coil respectively；

Described first kind coil has angle of inclination in electric motor winding end, and the angle of inclination ensures that the first kind coil uses Minimum length bypasses the second class coil adjacent thereto；The second described class coil is in electric motor winding end relative to stator axis Ensure that the second class coil bypasses first kind line adjacent thereto using minimum length to angle of inclination, the angle of inclination Circle.

2. machine winding as claimed in claim 1, it is characterised in that described stator includes multiple stator tooths and formed Multiple grooves between stator tooth, described first kind coil and the second class coil are all disposed within groove.

3. machine winding as claimed in claim 2, it is characterised in that the leading-out terminal of each first kind coil and end of incoming cables institute Two grooves between should at least be spaced two grooves, the leading-out terminal of second class coil or end of incoming cables are arranged on interval One of groove in, the leading-out terminal of another the second class coil or end of incoming cables are arranged in another groove at interval；

It should at least be spaced two grooves between two grooves where the leading-out terminal of each the second class coil and end of incoming cables, one The leading-out terminal of individual first kind coil or end of incoming cables are arranged in one of groove at interval, the outlet of another first kind coil End or end of incoming cables are arranged in another groove at interval.

4. machine winding as claimed in claim 1, it is characterised in that described first kind coil be close to by across second Class coil, only keeps necessary safe distance between each other, and the second described class coil be also close to by across the first kind Coil, necessary safe distance is only kept between each other.

5. machine winding as claimed in claim 4, it is characterised in that the first kind is set according to the edge radian of the second class coil The length of multiturn coil in coil, make every circle coil length disclosure satisfy that the circle coil be close to by across the second class line Circle, only keeps necessary safe distance between each other.

6. machine winding as claimed in claim 4, it is characterised in that the second class is set according to the edge radian of first kind coil The length of multiturn coil in coil, make every circle coil length disclosure satisfy that the circle coil be close to by across first kind line Circle, only keeps necessary safe distance between each other.

7. machine winding as claimed in claim 1, it is characterised in that by the series line number of turns of A phase coils, B in machine winding The series line number of turns in the series line number of turns and C phase coils of phase coil is both configured to even number, the first kind in ensureing per phase coil The quantity of coil and the second class coil is equal.