CN218976446U - Lead structure of same-phase two sets of stator windings of permanent magnet wind driven generator - Google Patents

Abstract

The utility model discloses a lead structure of two sets of same-phase stator windings of a permanent magnet wind driven generator, which can avoid the phenomenon that leads are connected with conducting rings in a staggered manner to the greatest extent; connecting the tail ends of two-phase windings of the same layer in the groove in each group of three-phase windings, and independently arranging the tail ends of the third-phase windings of the other layer in the groove to form O1 tail end points; then, recombining the two groups of three-phase windings embedded in the stator slot, forming a new group of windings with the three-phase windings at the upper layer in the slot, and forming a second new group of windings with the three-phase windings at the lower layer; finally, leading out wires of each phase winding of the upper layer in the groove are led out sequentially and connected to the upper layer conducting ring, and leading out wires of each phase winding of the lower layer in the groove are led out sequentially and connected to the lower layer conducting ring, so that the phenomenon that the leading out wires of each group of windings are crossed in the leading-out process is avoided; the risk of misconnection of the outgoing line is reduced.

Description

Lead structure of same-phase two sets of stator windings of permanent magnet wind driven generator

Technical Field

The utility model relates to a high-power permanent magnet wind driven generator, in particular to a lead structure of two sets of same-phase stator windings of a permanent magnet wind driven generator and a lead method thereof.

Background

The rotor structure of the high-power three-phase permanent magnet wind driven generator is generally as follows: the rotor is provided with multipole permanent magnet poles, the stator is provided with three-phase windings, the rotor rotates under the drive of the fan blades, and the stator windings cut magnetic force lines emitted by the multipole permanent magnet poles on the rotor to generate three-phase alternating current; for the purpose of outputting larger power or the purpose that after one group of windings fails, the other windings can continue to generate power, in the design, two or more sets of stator windings with zero phase difference are often adopted, the stator windings are embedded into stator slots, the stator slots adopt a double-layer winding arrangement structure, an upper layer coil and a lower layer coil are arranged in each slot, three-phase windings under the same magnetic pole are connected together in a star connection mode, the tail ends of each phase winding of the three-phase windings are connected together to form a common point O, which is also called a star point, the starting end of each phase winding is led out to a conducting ring outside the stator, and the conducting ring is connected with the output power end of the three-phase winding; when the phase difference of each set of stator windings of the three-phase permanent magnet wind driven generator adopting more than two sets of windings is zero, the phase of each set of windings is the same; according to the wiring process requirement of the double-layer winding, after the A-phase winding, the B-phase winding and the C-phase winding under the same magnetic pole are embedded into the stator slot, the initial ends of the two-phase windings are necessarily positioned at the lower layer of the stator slot if the initial ends of the two-phase windings are positioned at the upper layer of the stator slot; when two sets of windings are adopted, the initial ends of two-phase windings in the second set of windings are necessarily positioned at the lower layer of the stator slot, and the initial ends of the third phase windings of the second set of windings are necessarily positioned at the upper layer of the stator slot; six conducting rings are arranged at the stator outlet end along the axial direction, in order to shorten the wheelbase, the six conducting rings are generally arranged in a double-layer structure, wherein the three conducting rings at the outer layer are arranged as outgoing line conducting rings of a first group of windings, the three conducting rings at the inner layer are arranged as conducting rings of outgoing lines of a second group of windings, the structure ensures that the two groups of winding outgoing lines led out to the conducting rings can form a phenomenon of up-down intersection, and the up-down intersection phenomenon of the outgoing lines of each phase of winding can lead the wiring work of the production site to be abnormal, and the specific situations are that: (1) When the winding lead and the conducting ring are not in the same layer, the lead wire needs to be bent for many times, and damage can be caused to the winding lead wire; (2) When the conducting rings are axially arranged in multiple layers at the winding end, if the winding lead and the conducting rings are not in the same layer, the lead needs to pass through the winding end and the conducting rings, so that the lead and the winding end, the lead and the conducting rings and the lead are easy to touch together, and potential safety hazards of short circuit exist; (3) Particularly, when more than two sets of windings are adopted, for example, four sets of windings, a plurality of leads which are not on the same layer are adopted, and when the leads are connected with a plurality of layers of conducting rings, the risk of misconnection of the lead wires and the conducting rings is very easy to occur.

Disclosure of Invention

The utility model provides a lead structure of two sets of same-phase stator windings of a high-power permanent magnet wind driven generator, which can realize that when upper and lower leads of two sets of windings are connected with two layers of conducting rings, the upper and lower leads do not need to be bent, the phenomenon of crossing does not occur, and the phenomenon of misconnection of the leads and the conducting rings can be avoided to the greatest extent.

The utility model solves the technical problems by the following technical proposal:

the general conception of the utility model is that: when the high-power permanent magnet wind driven generator adopts two sets of stator windings with zero phase difference and adopts a double-layer winding arrangement structure form in a stator slot, and three-phase windings under the same magnetic pole are connected together in a star connection mode, the two sets of windings are firstly arranged according to the traditional double-layer winding arrangement structure form in the slot, wiring of the three-phase windings of the two sets of windings is carried out in the stator slot, then, when the traditional three-phase windings of each set are connected in a star mode, the tail ends of the windings of each phase are connected together to form a common point O2 connection form, and the connection mode is changed into: connecting the tail ends of two phase windings of each group of three-phase windings, which are arranged on the same layer (or on the same upper layer or on the same lower layer) in the groove, and independently arranging the tail ends of the third phase windings of the other layer in the groove to form O1 tail end points; then, recombining the two groups of three-phase windings embedded in the stator slot, forming a new group of windings with the three-phase windings at the upper layer in the slot, and forming a second new group of windings with the three-phase windings at the lower layer; finally, leading out wires of each phase winding of the upper layer in the groove are led out sequentially and connected to the upper layer conducting ring, and leading out wires of each phase winding of the lower layer in the groove are led out sequentially and connected to the lower layer conducting ring, so that the phenomenon that the leading out wires of each group of windings cross in the leading-out process is avoided.

The lead structure of two sets of stator windings in the same phase of a permanent magnet wind driven generator comprises a first set of stator windings and a second set of stator windings which are embedded in a motor stator winding embedding groove, wherein the phase difference between the first set of stator windings and the second set of stator windings is zero, the first set of stator windings and the second set of stator windings are arranged in a double-layer winding arrangement structure mode, an A-phase coil, a B-phase coil and a C-phase coil are arranged in the first set of stator windings, and a U-phase coil, a V-phase coil and a W-phase coil are arranged in the second set of stator windings; the coil edge where the tail end of the A phase coil is positioned is arranged at the lower layer of the stator slot, the coil edge where the tail end of the B phase coil is positioned is arranged at the lower layer of the stator slot, and the coil edge where the tail end of the C phase winding is positioned is arranged at the upper layer of the stator slot; the coil edge where the tail end of the U-phase coil is positioned is arranged on the upper layer of the stator slot, the coil edge where the tail end of the V-phase coil is positioned is arranged on the upper layer of the stator slot, and the coil edge where the tail end of the W-phase winding is positioned is arranged on the lower layer of the stator slot; the outer side of one end of the stator is respectively provided with three double-layer conducting rings, a first outer-layer conducting ring and a first inner-layer conducting ring are respectively arranged on a first double-layer conducting ring, a second outer-layer conducting ring and a second inner-layer conducting ring are respectively arranged on a second double-layer conducting ring, a third outer-layer conducting ring and a third inner-layer conducting ring are respectively arranged on a third double-layer conducting ring, the tail ends of the A-phase coil and the tail ends of the B-phase coil are connected together to form a first common point, and the tail ends of the C-phase coil are first tail end points; after the tail end points of the U-phase coil and the V-phase coil are connected together, a second common point is formed, and the tail end of the W-phase winding is a second tail end point; a first shorting wire is connected between the first common point and the second end point, and a second shorting wire is connected between the first end point and the second common point; the leading-out terminal of the A phase coil is connected to the first outer layer conductive ring, the leading-out terminal of the B phase coil is connected to the second outer layer conductive ring, the leading-out terminal of the C phase coil is connected to the third inner layer conductive ring, the leading-out terminal of the U phase coil is connected to the first inner layer conductive ring, the leading-out terminal of the V phase coil is connected to the second inner layer conductive ring, and the leading-out terminal of the W phase coil is connected to the third outer layer conductive ring.

The leading-out terminals of each phase coil are welded with the corresponding conducting rings.

A lead method of two sets of stator windings with the same phase of a permanent magnet wind driven generator comprises the steps of embedding a first set of stator windings and a second set of stator windings in a motor stator winding embedding groove, wherein the phase difference between the first set of stator windings and the second set of stator windings is zero, the first set of stator windings and the second set of stator windings are arranged in a double-layer winding arrangement structure mode, an A-phase coil, a B-phase coil and a C-phase coil are arranged in the first set of stator windings, and a U-phase coil, a V-phase coil and a W-phase coil are arranged in the second set of stator windings; three double-layer conducting rings are respectively arranged on the outer side of one end of the stator, a first outer-layer conducting ring and a first inner-layer conducting ring are respectively arranged on a first double-layer conducting ring, a second outer-layer conducting ring and a second inner-layer conducting ring are respectively arranged on a second double-layer conducting ring, and a third outer-layer conducting ring and a third inner-layer conducting ring are respectively arranged on a third double-layer conducting ring; the method is characterized by comprising the following steps of:

the method comprises the following steps that firstly, a first set of stator windings consisting of an A-phase coil, a B-phase coil and a C-phase coil and a second set of stator windings consisting of a U-phase coil, a V-phase coil and a W-phase coil are embedded into a stator winding embedding groove in a double-layer arrangement mode in the groove; the coil edge of the end of the phase A coil is embedded in the lower layer of the stator slot, the coil edge of the end of the phase B coil is arranged in the lower layer of the stator slot, the coil edge of the end of the phase C coil is arranged in the upper layer of the stator slot, the coil edge of the end of the phase U coil is arranged in the upper layer of the stator slot, the coil edge of the end of the phase V coil is arranged in the upper layer of the stator slot, and the coil edge of the end of the phase W coil is arranged in the lower layer of the stator slot;

the second step, connecting the tail end of the phase A coil with the tail end of the phase B coil to form a first common point, wherein the tail end of the phase C winding is a first tail end point; connecting the tail end point of the U-phase coil with the tail end point of the V-phase coil to form a second common point, wherein the tail end of the W-phase winding is a second tail end point; connecting a first shorting line between the first common point and the second end point, and connecting a second shorting line between the first end point and the second common point;

and thirdly, connecting the lead-out wire end of the phase A coil to the first outer layer conductive ring, connecting the lead-out wire end of the phase B coil to the second outer layer conductive ring, connecting the lead-out wire end of the phase C coil to the third inner layer conductive ring, connecting the lead-out end of the phase U coil to the first inner layer conductive ring, connecting the lead-out end of the phase V coil to the second inner layer conductive ring, and connecting the lead-out end of the phase W coil to the third outer layer conductive ring.

The utility model realizes that the lead wires of each winding do not need to be bent in the extraction process, and the lead wires are directly connected with the conducting ring after extraction, thereby avoiding the damage of the winding; the lead wire cannot cross the upper layer and the lower layer at the conducting ring, so that the occurrence of short circuit is avoided to the greatest extent; the upper layer lead wire of each winding is welded on the upper layer conductive ring, the lower layer lead wire is welded on the lower layer conductive ring, and the arrangement is straightforward, simple and reasonable, so that the operation of on-site wiring is greatly facilitated, and the risk of misconnection of outgoing wires is reduced.

Drawings

FIG. 1 is an expanded schematic view of the connection of two sets of windings to a double layer conductive ring of the present utility model;

FIG. 2 is a schematic diagram of the first stator winding set of the present utility model in wire insertion;

FIG. 3 is a schematic diagram of the structure of a second set of stator windings of the present utility model during coil insertion;

FIG. 4 is a schematic view of the connection structure of the end points after the two sets of windings are inserted;

fig. 5 is a schematic diagram of the structure of the utility model in which two sets of windings are inserted and the lead terminals of the two windings recombined after terminal connection are connected to a conductive ring.

Detailed Description

The utility model is described in detail below with reference to the attached drawing figures:

the lead structure of two sets of stator windings in the same phase of a permanent magnet wind driven generator comprises a first set of stator windings and a second set of stator windings which are embedded in a motor stator winding embedding groove, wherein the phase difference between the first set of stator windings and the second set of stator windings is zero, the first set of stator windings and the second set of stator windings are arranged in a double-layer winding arrangement structure mode, namely an upper layer winding coil and a lower layer winding coil are embedded in each groove, an A phase coil 1, a B phase coil 2 and a C phase coil 3 are arranged in the first set of stator windings, and a U phase coil 4, a V phase coil 5 and a W phase coil 6 are arranged in the second set of stator windings; the coil edge where the tail end of the phase A coil 1 is positioned is arranged at the lower layer of the stator slot, the coil edge where the tail end of the phase B coil 2 is positioned is arranged at the lower layer of the stator slot, and the coil edge where the tail end of the phase C coil 3 is positioned is arranged at the upper layer of the stator slot; the coil side where the tail end of the U-phase coil 4 is positioned is arranged on the upper layer of the stator slot, the coil side where the tail end of the V-phase coil 5 is positioned is arranged on the upper layer of the stator slot, and the coil side where the tail end of the W-phase winding 6 is positioned is arranged on the lower layer of the stator slot; three double-layer conductive rings are respectively arranged on the outer side of one end of the stator, a first outer-layer conductive ring (9) and a first inner-layer conductive ring (10) are respectively arranged on a first double-layer conductive ring, a second outer-layer conductive ring (11) and a second inner-layer conductive ring (12) are respectively arranged on a second double-layer conductive ring, a third outer-layer conductive ring (13) and a third inner-layer conductive ring (14) are respectively arranged on a third double-layer conductive ring, the tail end of an A-phase coil (1) and the tail end of a B-phase coil (2) are connected together to form a first common point (O2), and the tail end of a C-phase winding (3) is a first tail end point (O1); after the end points of the U-phase coil 4 and the V-phase coil 5 are connected together, a second common point O4 is formed, and the end of the W-phase winding 6 is a second end point O3; a first shorting line 8 is connected between the first common point O2 and the second end point O3, and a second shorting line 7 is connected between the first end point O1 and the second common point O4; the leading-out terminal of the A-phase coil 1 is connected to the first outer layer conductive ring 9, the leading-out terminal of the B-phase coil 2 is connected to the second outer layer conductive ring 11, the leading-out terminal of the C-phase coil 3 is connected to the third inner layer conductive ring 14, the leading-out terminal of the U-phase coil 4 is connected to the first inner layer conductive ring 10, the leading-out terminal of the V-phase coil 5 is connected to the second inner layer conductive ring 12, and the leading-out terminal of the W-phase coil 6 is connected to the third outer layer conductive ring 13.

The leading-out terminals of the coils of each phase are welded with the corresponding conducting rings; for the coil embedded in the lower layer in the groove, after the lead-out wire ends on the coil are led out outwards at the position of the lower layer of the coil and are connected to the outer layer conductive ring of the double-layer conductive ring, the lead-out wire does not need to be bent, the lead-out wire is smooth, and no intersection exists between the lead-out wire and other lead-out wires; for the coil embedded in the upper layer in the groove, after the lead-out wire ends on the coil are led out outwards at the position of the upper layer of the coil and are connected to the inner layer conductive ring of the double-layer conductive ring, the lead-out wire does not need to be bent, the lead-out wire is smooth, and no intersection exists between the lead-out wire and other lead-out wires; the wiring method greatly facilitates on-site wiring work; if four sets of three-phase windings or more sets of windings are arranged on the stator, the arrangement method is the same as the arrangement method of the utility model; when four sets of windings are arranged, hundreds of outgoing lines are arranged, and the wiring method greatly facilitates connection of the outgoing lines and the conducting rings.

The method for leading the same-phase two sets of stator windings of the permanent magnet wind driven generator comprises the steps of embedding a first set of stator windings and a second set of stator windings in a motor stator winding embedding groove, wherein the phase difference between the first set of stator windings and the second set of stator windings is zero, the first set of stator windings and the second set of stator windings are arranged in a double-layer winding arrangement structure mode, an A-phase coil 1, a B-phase coil 2 and a C-phase coil 3 are arranged in the first set of stator windings, and a U-phase coil 4, a V-phase coil 5 and a W-phase coil 6 are arranged in the second set of stator windings; three double-layer conducting rings are respectively arranged on the outer side of one end of the stator, a first outer-layer conducting ring 9 and a first inner-layer conducting ring 10 are respectively arranged on the first double-layer conducting ring, a second outer-layer conducting ring 11 and a second inner-layer conducting ring 12 are respectively arranged on the second double-layer conducting ring, and a third outer-layer conducting ring 13 and a third inner-layer conducting ring 14 are respectively arranged on the third double-layer conducting ring; the method is characterized by comprising the following steps of:

a first step of embedding a first set of stator windings consisting of an A-phase coil 1, a B-phase coil 2 and a C-phase coil 3 and a second set of stator windings consisting of a U-phase coil 4, a V-phase coil 5 and a W-phase coil 6 into a stator winding embedding groove in a double-layer arrangement manner in the groove; the coil edge of the end of the phase A coil 1 is embedded in the lower layer of the stator slot, the coil edge of the end of the phase B coil 2 is arranged in the lower layer of the stator slot, the coil edge of the end of the phase C coil 3 is arranged in the upper layer of the stator slot, the coil edge of the end of the phase U coil 4 is arranged in the upper layer of the stator slot, the coil edge of the end of the phase V coil 5 is arranged in the upper layer of the stator slot, and the coil edge of the end of the phase W coil 6 is arranged in the lower layer of the stator slot;

the second step, connecting the tail end of the phase A coil 1 with the tail end of the phase B coil 2 to form a first common point O2, wherein the tail end of the phase C winding 3 is a first tail end point O1; connecting the tail end point of the U-phase coil 4 with the tail end point of the V-phase coil 5 to form a second common point O4, wherein the tail end of the W-phase winding 6 is a second tail end point O3; a first shorting line 8 is connected between the first common point O2 and the second end point O3, and a second shorting line 7 is connected between the first end point O1 and the second common point O4;

thirdly, connecting the lead-out wire end of the phase A coil 1 to the first outer conductive ring 9, connecting the lead-out wire end of the phase B coil 2 to the second outer conductive ring 11, connecting the lead-out wire end of the phase C coil 3 to the third inner conductive ring 14, connecting the lead-out wire end of the phase U coil 4 to the first inner conductive ring 10, connecting the lead-out wire end of the phase V coil 5 to the second inner conductive ring 12, and connecting the lead-out wire end of the phase W coil 6 to the third outer conductive ring 13;

the two sets of three-phase windings are embedded into the motor stator slot according to the traditional wire embedding technology with double-layer structure, and only when the tail ends of the two sets of three-phase windings are connected in a star connection mode, the six phase windings are recombined, the three-phase windings at the upper layer of the wire embedding slot are recombined into a new three-phase winding, and the three-phase windings at the lower layer of the wire embedding slot are recombined into another new three-phase winding, so that the smoothness of outgoing wires is realized, and the intersection of outgoing wires is avoided.

Claims (2)

1. The lead structure of two sets of stator windings in the same phase of a permanent magnet wind driven generator comprises a first set of stator windings and a second set of stator windings which are embedded in a motor stator winding embedding groove, wherein the phase difference between the first set of stator windings and the second set of stator windings is zero, the first set of stator windings and the second set of stator windings are arranged in a double-layer winding arrangement structure mode, an A-phase coil (1), a B-phase coil (2) and a C-phase coil (3) are arranged in the first set of stator windings, and a U-phase coil (4), a V-phase coil (5) and a W-phase coil (6) are arranged in the second set of stator windings; the coil edge where the tail end of the phase A coil (1) is located is arranged at the lower layer of the stator slot, the coil edge where the tail end of the phase B coil (2) is located is arranged at the lower layer of the stator slot, and the coil edge where the tail end of the phase C coil (3) is located is arranged at the upper layer of the stator slot; the coil edge where the tail end of the U-phase coil (4) is positioned is arranged on the upper layer of the stator slot, the coil edge where the tail end of the V-phase coil (5) is positioned is arranged on the upper layer of the stator slot, and the coil edge where the tail end of the W-phase winding (6) is positioned is arranged on the lower layer of the stator slot; three double-layer conducting rings are respectively arranged on the outer side of one end of the stator, a first outer-layer conducting ring (9) and a first inner-layer conducting ring (10) are respectively arranged on a first double-layer conducting ring, a second outer-layer conducting ring (11) and a second inner-layer conducting ring (12) are respectively arranged on a second double-layer conducting ring, and a third outer-layer conducting ring (13) and a third inner-layer conducting ring (14) are respectively arranged on a third double-layer conducting ring, and the stator is characterized in that after the tail end of an A-phase coil (1) and the tail end of a B-phase coil (2) are connected together, a first common point (O2) is formed, and the tail end of a C-phase winding (3) is a first tail end point (O1); after the tail end point of the U-phase coil (4) is connected with the tail end point of the V-phase coil (5), a second common point (O4) is formed, and the tail end of the W-phase winding (6) is a second tail end point (O3); a first shorting line (8) is connected between the first common point (O2) and the second end point (O3), and a second shorting line (7) is connected between the first end point (O1) and the second common point (O4); the leading-out terminal of the phase coil A (1) is connected to the first outer layer conductive ring (9), the leading-out terminal of the phase coil B (2) is connected to the second outer layer conductive ring (11), the leading-out terminal of the phase coil C (3) is connected to the third inner layer conductive ring (14), the leading-out terminal of the phase coil U (4) is connected to the first inner layer conductive ring (10), the leading-out terminal of the phase coil V (5) is connected to the second inner layer conductive ring (12), and the leading-out terminal of the phase coil W (6) is connected to the third outer layer conductive ring (13).

2. The lead structure of two sets of stator windings in the same phase of a permanent magnet wind power generator according to claim 1, wherein the lead ends of each phase coil are welded with the corresponding conductive ring.

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