Coil structure, flat wire stator assembly and generator

Abstract

The utility model relates to the technical field of generators, in particular to a coil structure, which comprises a first three-phase total winding and a second three-phase total winding. Each of the first three-phase total winding and the second three-phase total winding comprises a first three-phase branch and a second three-phase branch; the first three-phase branch and the second three-phase branch are connected in parallel; compared with a traditional flat wire double-branch scheme, the four-phase-branch alternating-current generator simultaneously adopts a scheme of four three-phase branches, so that the single-branch current of the stator is smaller, and the number of the branches is increased, so that the skin effect of the stator is weakened, the loss is reduced, and the maximum output and the efficiency value of the stator are effectively improved for the automobile alternating-current generator applied to an alternating magnetic field; meanwhile, the flat wire stator adopts a six-phase winding scheme, four three-phase branches are connected in parallel to form double branches by using a scheme of connecting the four three-phase branches in parallel, and the characteristics of parallel resistors are utilized, so that the single-phase resistance of the branches after parallel connection is lower, and the stator impedance is greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of generator, specifically, the utility model relates to a coil structure, flat wire stator assembly and generator. BACKGROUND

[0002] The stator assembly of the alternator is an element for generating induction potential and outputting externally; in order to improve the output power density of the stator, the traditional generator currently adopts a flat wire stator scheme with the development of the industry, so that the stator slot fill rate and output power density are higher through the arrangement of the flat wire stator structure; at the same time, since the stator is the main heating element, in order to reduce the stator temperature rise and improve the reliability of the motor, but due to the output characteristics of the alternator, when the motor speed reaches the rated speed, the output power will no longer increase with the speed due to the impedance; the impedance of the current generator is high, the stator power loss is large, and the stator output efficiency is low.

[0003] The applicant found, through retrieval, that the Chinese patent document with publication number 117375340A disclosed a stator coil winding mold, a stator coil, and a coil winding method on January 9, 2024, wherein the winding mold includes a bottom plate and a side plate, both of which are made of insulating materials to avoid the situation that the winding mold is easily magnetically saturated under certain high magnetic field conditions, ensuring the normal operation of the linear motor; the stator coil includes a winding mold, a coil wound outside the winding mold, and a strap threaded through the binding hole for fixing the coil, the coil is threaded through the threading hole, so that the surface of the stator coil is more flat and the coil is intact without insulation damage; the coil winding method includes winding of A-phase winding, winding of B-phase winding, winding of C-phase winding, and formation of an insulation layer; the device cannot solve the above technical problems.

[0004] Therefore, in order to improve or solve at least one of the above problems, a coil structure capable of improving the output efficiency of the stator is needed. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a coil structure capable of improving the output efficiency of the stator.

[0006] In order to solve the above technical problems, the utility model adopts the technical scheme: a coil structure, including a first three-phase total winding and a second three-phase total winding; the first three-phase total winding and the second three-phase total winding both include a first three-phase branch and a second three-phase branch; the first three-phase branch and the second three-phase branch are connected in parallel.

[0007] The first three-phase branch includes three single-phase branches, which are U1 branch, V1 branch and W1 branch respectively; the U1 branch, V1 branch and W1 branch in the first three-phase branch are Y-connected; the second three-phase branch includes three single-phase branches, which are U2 branch, V2 branch and W2 branch respectively; the U2 branch, V2 branch and W2 branch in the second three-phase branch are Y-connected.

[0008] The U1 branch includes U1 outgoing line and U1 neutral line; the V1 branch includes V1 outgoing line and V1 neutral line; the W1 branch includes W1 outgoing line and W1 neutral line; the U2 branch includes U2 outgoing line and U2 neutral line; the V2 branch includes V2 outgoing line and V2 neutral line; the W2 branch includes W2 outgoing line and W2 neutral line; the U1 outgoing line and U2 outgoing line are connected; the V1 outgoing line and V2 outgoing line are connected; the W1 outgoing line and W2 outgoing line are connected; the U1 neutral line is connected with the V1 neutral line and W1 neutral line respectively; the U2 neutral line is connected with the V2 neutral line and W2 neutral line respectively.

[0009] A flat wire stator assembly includes a stator structure and a coil structure; the first three-phase total winding and the second three-phase total winding in the coil structure are arranged on the stator structure.

[0010] The stator structure includes a stator slot; 2N layers of insertion slots are arranged in the stator slot, N is 1, 2, 3, …; the first three-phase branch is arranged in 2N-1 layers of insertion slots; the second three-phase branch is arranged in 2N layers of insertion slots.

[0011] The stator structure includes a stator core; a center hole is arranged on the stator core; the center hole is coaxially arranged with the stator core; the U1 outgoing line, V1 outgoing line, W1 outgoing line, U2 outgoing line, V2 outgoing line and W2 outgoing line are arranged in the insertion slots on the side of the stator slot close to or away from the center hole.

[0012] The U1 neutral line, V1 neutral line, W1 neutral line, U2 neutral line, V2 neutral line and W2 neutral line are arranged in the insertion slots on the side of the stator slot close to or away from the center hole; the U1 neutral line and U2 neutral line are arranged in the same stator slot; the V1 neutral line and V2 neutral line are arranged in the same stator slot; the W1 neutral line and W2 neutral line are arranged in the same stator slot.

[0013] The number of stator slots spanned between the W1 neutral line and the U1 neutral line is the same as the number of stator slots spanned between the W1 neutral line and the V1 neutral line; the number of stator slots spanned between the W2 neutral line and the U2 neutral line is the same as the number of stator slots spanned between the W2 neutral line and the V2 neutral line.

[0014] Each single-phase branch in the first three-phase branch and / or the second three-phase branch comprises a wave winding; the wave winding is connected with a cross-layer wire; each cross-layer wire comprises a first pin and a second pin; the outgoing wire in the single-phase branch where the cross-layer wire is located is in the same stator slot as the first pin in the cross-layer wire; the neutral wire in the single-phase branch where the cross-layer wire is located is in the same stator slot as the second pin in the cross-layer wire.

[0015] Each wave winding comprises a U-pin wire; the outgoing wire and the neutral wire of each single-phase branch are I-Pin wires.

[0016] A generator comprising the flat wire stator assembly.

[0017] The utility model has the advantages of:

[0018] The utility model adopts the flat wire stator to increase the motor power density, and simultaneously adopts the four three-phase branch scheme, so that the stator single-phase branch current is smaller than that of the traditional flat wire double-branch scheme, and the increase of the branch number weakens the stator skin effect of the automobile alternating-current generator applied to the alternating magnetic field, reduces the loss, effectively improves the stator maximum output and efficiency value; simultaneously, the flat wire stator of the utility model adopts the six-phase winding scheme, simultaneously uses the four three-phase branch parallel connection scheme, connects the four branches in parallel to double branches, utilizes the parallel resistance characteristics, so that the single-phase resistance of the branch after parallel connection is lower, and the stator impedance is greatly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] The specific embodiments of the utility model will be further described in detail below in combination with the drawings, wherein:

[0020] Figure 1 It is a structure schematic view of the first three-phase total winding of the utility model.

[0021] Figure 2 It is a structure schematic view of the second three-phase total winding of the utility model.

[0022] Figure 3 It is a structure schematic view of the coil structure of the utility model.

[0023] Figure 4 It is a partial enlarged view of A of Figure 2

[0024] Figure 5 It is a structure schematic view of the stator structure of the utility model.

[0025] Figure 6 It is a partial enlarged view of B of Figure 4

[0026] Figure 7 ​​The utility model discloses a single phase branch structure schematic view.

[0027] Figure 8 The utility model discloses a slot structure schematic view.

[0028] Figure 9 The utility model discloses a first three -phase branch and second three -phase branch in stator structure connection principle development schematic view.

[0029] Figure 10 The utility model discloses a single phase branch parallel branch connection principle development schematic view.

[0030] Figure 11 The utility model discloses a first three -phase branch in single phase branch connection principle development schematic view.

[0031] Figure 12 The utility model discloses a second three -phase branch in single phase branch connection principle development schematic view.

[0032] Figure 13 The utility model discloses a cross -layer line connection principle development schematic view.

[0033] Figure 14 The utility model discloses a performance schematic view.

[0034] The mark in above -mentioned drawing is all:

[0035] The mark in drawing is:

[0036] 1, first three -phase total winding, 101, second three -phase total winding,

[0037] 2, first three -phase branch,

[0038] 3, second three -phase branch,

[0039] 4, U1 branch, 401, V1 branch, 402, W1 branch, 403, U1 lead -out line, 404, V1 lead -out line, 405, W1 lead -out line,

[0040] 5, U2 branch, 501, V2 branch, 502, W2 branch, 503, U2 lead -out line, 504, V2 lead -out line, 505, W2 lead -out line,

[0041] 6, U1 neutral line, 601, V1 neutral line, 602, W1 neutral line,

[0042] 7, U2 neutral line, 701, V2 neutral line, 702, W2 neutral line,

[0043] 8, stator structure, 801, stator slot, 802, slot, 803, center hole,

[0044] 9, wave winding, 901, cross-layer wire, 902, U-pin wire, 903, I-Pin wire, 904, pin, 905, first pin, 906, second pin. DETAILED DESCRIPTION

[0045] The specific embodiments of the present application will be further described in detail below with reference to the drawings, and the purpose is to help the technical personnel in the field to have a more complete, accurate and in-depth understanding of the inventive concept and technical scheme of the present application, and to help them to implement.

[0046] As Figure 1 and Figure 2 The coil structure shown in the drawings comprises a first three-phase total winding 1 and a second three-phase total winding 101; the first three-phase total winding 1 and the second three-phase total winding 101 each comprise a first three-phase branch 2 and a second three-phase branch 3; the first three-phase branch 2 and the second three-phase branch 3 are connected in parallel.

[0047] The first three-phase total winding 1 and the second three-phase total winding 101 each comprise a first three-phase branch 2 and a second three-phase branch 3; the first three-phase branch 2 and the second three-phase branch 3 are connected in parallel; the present application simultaneously adopts a four three-phase branch scheme, which is smaller than the traditional flat wire double branch scheme, so that the stator single branch current is smaller, and the increase in the number of branches weakens the skin effect of the stator for the alternating magnetic field application of the automobile alternator, reduces the loss, and effectively improves the maximum output and efficiency value of the stator; at the same time, the flat wire stator of the present application adopts a six-phase winding scheme, and simultaneously uses a parallel connection scheme between four three-phase branches to connect the four branches in parallel to double branches, utilizes the parallel resistance characteristics, so that the single-phase resistance of the branch after parallel connection is lower, and the stator impedance is greatly reduced.

[0048] As Figure 3 and Figure 4 As shown, the first three-phase branch 2 comprises three single-phase branches, which are U1 branch 4, V1 branch 401 and W1 branch 402 respectively; the U1 branch 4, the V1 branch 401 and the W1 branch 402 in the first three-phase branch 2 are connected in Y shape; the second three-phase branch 3 comprises three single-phase branches, which are U2 branch 5, V2 branch 501 and W2 branch 502 respectively; the U2 branch 5, the V2 branch 501 and the W2 branch 502 in the second three-phase branch 3 are connected in Y shape.

[0049] The Y-shaped connection, also known as star connection, is a connection mode of three-phase circuit; it connects the ends of three-phase windings into a neutral point, and the first end is connected with phase lines; U1 branch 4, V1 branch 401 and W1 branch 402 are single-phase branches of the first three-phase branch 2; U1 branch 4, V1 branch 401 and W1 branch 402 are each provided with a neutral line, and the three neutral lines are I-Pin lines 903 which are bent and welded; U2 branch 5, V2 branch 501 and W2 branch 502 are single-phase branches of the second three-phase branch 3, and U2 branch 5, V2 branch 501 and W2 branch 502 are each provided with a neutral line, and the three neutral lines are I-Pin lines 903 which are bent and welded; the utility model discloses four three-phase branches, four neutral point welding positions, cancellation of busbar design, and on the basis of the similar existing patent structure of the same specification, the number of neutral points is reduced from six to four, which is one third less than the existing scheme, so that the stator production process is simpler and the cost is lower.

[0050] U1 branch 4 includes U1 outgoing line 403 and U1 neutral line 6; V1 branch 401 includes V1 outgoing line 404 and V1 neutral line 601; W1 branch 402 includes W1 outgoing line 405 and W1 neutral line 602; U2 branch 5 includes U2 outgoing line 503 and U2 neutral line 7; V2 branch 501 includes V2 outgoing line 504 and V2 neutral line 701; W2 branch 502 includes W2 outgoing line 505 and W2 neutral line 702; U1 outgoing line 403 is connected with U2 outgoing line 503; V1 outgoing line 404 is connected with V2 outgoing line 504; W1 outgoing line 405 is connected with W2 outgoing line 505; U1 neutral line 6 is connected with V1 neutral line 601 and W1 neutral line 602 respectively; U2 neutral line 7 is connected with V2 neutral line 701 and W2 neutral line 702 respectively.

[0051] U1 neutral line 6 is connected with V1 neutral line 601 and W1 neutral line 602 respectively, so that the Y-shaped connection of the first three-phase branch 2 can be realized; U2 neutral line 7 is connected with V2 neutral line 701 and W2 neutral line 702 respectively, so that the Y-shaped connection of the second three-phase branch 3 can be realized; U1 outgoing line 403 and U2 outgoing line 503 are both I-Pin lines 903, which are bent and welded, so that the parallel connection of U1 branch 4 and U2 branch 5 is realized; V1 outgoing line 404 and V2 outgoing line 504 are both I-Pin lines 903, which are bent and welded, so that the parallel connection of V1 branch 401 and V2 branch 501 is realized; W1 outgoing line 405 and W2 outgoing line 505 are both I-Pin lines 903, which are bent and welded, so that the parallel connection of W1 branch 402 and W2 branch 502 is realized.

[0052] As Figure 5As shown in the figure, a flat wire stator assembly includes a stator structure 8 and a coil structure; a first three-phase total winding 1 and a second three-phase total winding 101 in the coil structure are arranged on the stator structure 8.

[0053] The stator structure 8 can be a 96-slot or 72-slot or 48-slot stator; the first three-phase total winding 1 and the second three-phase total winding 101 are wound on the stator structure 8; thus, the stator structure 8 is provided with six-phase four three-phase branches, compared with the traditional six-phase two-branch scheme, by using four independent three-phase branch circuits, the single branch current is greatly reduced compared with the existing scheme, thereby reducing the skin effect of the stator, reducing the power loss of the stator, and improving the output efficiency of the stator.

[0054] As shown in the figure, Figure 8 The stator structure 8 includes a stator slot 801; the stator slot 801 is provided with 2N layers of insertion slots 802, N is 1, 2, 3, …; the first three-phase branch 2 is arranged in the 2N-1 layer insertion slot 802; the second three-phase branch 3 is arranged in the 2N layer insertion slot 802;

[0055] The stator structure 8 includes a stator core; the stator core is provided with a center hole 803; the center hole 803 is coaxially arranged with the stator core; the U1 outgoing line 403, the V1 outgoing line 404, the W1 outgoing line 405, the U2 outgoing line 503, the V2 outgoing line 504 and the W2 outgoing line 505 are arranged in the insertion slot 802 close to or away from the center hole 803 of the stator slot 801.

[0056] The stator structure 8 is provided with 96 or 72 or 48 stator slots 801; the stator structure 8 includes a center hole 803; the stator slots 801 are arranged along the circumference of the center hole 803; the stator slots 801 are half-closed through slots; the stator slots 801 are provided with multiple layers of insertion slots 802, which are arranged along the radial direction of the stator structure 8; the first three-phase branch 2 and the second three-phase branch 3 are arranged in the odd layer insertion slot 802 and the even layer insertion slot 802 of the same stator slot 801 respectively, and the two are connected in a spaced winding manner, so that the single-phase branch winding length is equal, thereby ensuring that the lead length of any phase branch is consistent, and the winding phase distribution is more uniform;

[0057] The U1 outgoing line 403, the V1 outgoing line 404, the W1 outgoing line 405, the U2 outgoing line 503, the V2 outgoing line 504 and the W2 outgoing line 505 are arranged in the innermost layer or the outermost layer of the stator slot 801.

[0058] As shown in the figure, Figures 9-13As shown, in the embodiment, the stator slot 801 includes 6 layers of slots 802; the U1 branch 4 and the U2 branch 5 are arranged in the same stator slot 801, the U1 branch 4 is arranged in the 1st, 3rd and 5th layers of slots 802, and the U2 branch 5 is arranged in the 2nd, 4th and 6th layers of slots 802, or the U1 branch 4 is arranged in the 2nd, 4th and 6th layers of slots 802, and the U2 branch 5 is arranged in the 1st, 3rd and 5th layers of slots 802; the V1 branch 401 and the V2 branch 501 are arranged in the same stator slot 801, the V1 branch 401 is arranged in the 1st, 3rd and 5th layers of slots 802, and the V2 branch 501 is arranged in the 2nd, 4th and 6th layers of slots 802, or the V1 branch 401 is arranged in the 2nd, 4th and 6th layers of slots 802, and the V2 branch 501 is arranged in the 1st, 3rd and 5th layers of slots 802; the W1 branch 402 and the W2 branch 502 are arranged in the same stator slot 801, the W1 branch 402 is arranged in the 1st, 3rd and 5th layers of slots 802, and the W2 branch 502 is arranged in the 2nd, 4th and 6th layers of slots 802, or the W1 branch 402 is arranged in the 2nd, 4th and 6th layers of slots 802, and the W2 branch 502 is arranged in the 1st, 3rd and 5th layers of slots 802; the U1 outgoing line 403, the V1 outgoing line 404, the W1 outgoing line 405, the U2 outgoing line 503, the V2 outgoing line 504 and the W2 outgoing line 505 are arranged in different stator slots 801, and are arranged in the 1st layer or the 6th layer of the stator slot 801.

[0059] The U1 neutral line 6, the V1 neutral line 601, the W1 neutral line 602, the U2 neutral line 7, the V2 neutral line 701 and the W2 neutral line 702 are arranged in the slots 802 on the side of the stator slot 801 close to or away from the central hole 803; the U1 neutral line 6 and the U2 neutral line 7 are arranged in the same stator slot 801; the V1 neutral line 601 and the V2 neutral line 701 are arranged in the same stator slot 801; the W1 neutral line 602 and the W2 neutral line 702 are arranged in the same stator slot 801.

[0060] The U1 neutral line 6 and the U2 neutral line 7 are arranged in the same stator slot 801, and are respectively arranged in the innermost layer and the outermost layer of the stator slot 801; the V1 neutral line 601 and the V2 neutral line 701 are arranged in the same stator slot 801, and are respectively arranged in the innermost layer and the outermost layer of the stator slot 801; the W1 neutral line 602 and the W2 neutral line 702 are arranged in the same stator slot 801, and are respectively arranged in the innermost layer and the outermost layer of the stator slot 801; thus the positions of the neutral lines are the same as the span; the relative positions of the neutral points of any one place are basically the same, so that the process feasibility of the neutral line welding is stronger, and the standardization degree of the process is higher.

[0061] In the embodiment, the U1 neutral line 6 is arranged in the slot 802 of the 1st layer or the 6th layer, the U2 neutral line 7 is arranged in the slot 802 of the 6th layer or the 1st layer in the same stator slot 801; the V1 neutral line 601 is arranged in the slot 802 of the 1st layer or the 6th layer, the V2 neutral line 701 is arranged in the slot 802 of the 6th layer or the 1st layer in the same stator slot 801; the W1 neutral line 602 is arranged in the slot 802 of the 1st layer or the 6th layer, the W2 neutral line 702 is arranged in the slot 802 of the 6th layer or the 1st layer in the same stator slot 801.

[0062] The number of stator slots 801 crossed between the W1 neutral line 602 and the U1 neutral line 6 is the same as the number of stator slots 801 crossed between the W1 neutral line 602 and the V1 neutral line 601; the number of stator slots 801 crossed between the W2 neutral line 702 and the U2 neutral line 7 is the same as the number of stator slots 801 crossed between the W2 neutral line 702 and the V2 neutral line 701.

[0063] The slot pitch crossed between the W1 neutral line 602 and the U1 neutral line 6 is equal to the slot pitch crossed between the W1 neutral line 602 and the V1 neutral line 601; the slot pitch crossed between the W2 neutral line 702 and the U2 neutral line 7 is equal to the slot pitch crossed between the W2 neutral line 702 and the V2 neutral line 701; which can make the inter-phase resistance more balanced, and reduce the abnormal heating problem caused by the phase balance problem;

[0064] In the embodiment, the W1 neutral line 602 and the W2 neutral line 702 are arranged in the same stator slot 801, and both are arranged in the 9th stator slot 801; the U1 neutral line 6 and the U2 neutral line 7 are arranged in the same stator slot 801, and both are arranged in the 1st stator slot 801; the V1 neutral line 601 and the V2 neutral line 701 are arranged in the same stator slot 801, and both are arranged in the 17th stator slot 801.

[0065] As shown in Figure 6 and Figure 7 Each single-phase branch in the first three-phase branch 2 and / or the second three-phase branch 3 includes a wave winding 9; the wave winding 9 is connected with a cross-layer wire 901; each cross-layer wire 901 includes a first pin 905 and a second pin 906; the outgoing wire in the single-phase branch where the cross-layer wire 901 is located is in the same stator slot 801 as the first pin 905 in the cross-layer wire 901; the neutral wire in the single-phase branch where the cross-layer wire 901 is located is in the same stator slot 801 as the second pin 906 in the cross-layer wire 901;

[0066] Each wave winding 9 includes a U-pin wire 902; the outgoing wire and the neutral wire of each single-phase branch are I-Pin wires 903.

[0067] The U-pin wire 902 is a hairpin wire; the wave winding coil 9 comprises a plurality of U-pin wires 902, and the cross-layer wire 901 is also a U-pin wire 902. The cross-layer wire 901 of the single-phase branch is connected between two adjacent wave winding coils 9 of the single-phase branch, so as to realize the cross-layer connection of the wave winding coil 9. The U-pin wire 902 comprises two pins 904, and the pins 904 are respectively inserted into different stator slots 801. The cross-layer wire 901 comprises a first pin 905 and a second pin 906. The first pin 905 of the cross-layer wire 901 is arranged in the same stator slot 801 as the outgoing wire of each single-phase branch of the U1 branch 4, the V1 branch 401, the W1 branch 402, the U2 branch 5, the V2 branch 501 and the W2 branch 502. The second pin 906 of the cross-layer wire 901 is arranged in the same stator slot 801 as the neutral wire of each single-phase branch of the U1 branch 4, the V1 branch 401, the W1 branch 402, the U2 branch 5, the V2 branch 501 and the W2 branch 502. The outgoing wire I-pin and the cross-layer wire U-pin are arranged in the same slot and have the same span, so that the outgoing wire I-pin does not need to be bent, and the space is reserved for the cross-layer wire, so that the cross-layer wire and other U-pin wires can be arranged at the same height.

[0068] In the embodiment, the U1 branch 4, the V1 branch 401, the W1 branch 402, the U2 branch 5, the V2 branch 501 and the W2 branch 502 each comprise three wave winding coils 9 and two cross-layer wires 901. The wave winding coil 9 comprises 16 continuous U-pin wires 902 connected at a specified slot interval. The first pin 905 of the first cross-layer wire 901 is arranged in the second layer of the slot 802 of the stator slot 801 in which the neutral wire of each single-phase branch of the U1 branch 4, the V1 branch 401, the W1 branch 402, the U2 branch 5, the V2 branch 501 and the W2 branch 502 is arranged. The second pin 906 of the first cross-layer wire 901 is arranged in the third layer of the slot 802 of the stator slot 801 in which the outgoing wire of each single-phase branch is arranged. The first pin 905 of the second cross-layer wire 901 is arranged in the fourth layer of the slot 802 of the stator slot 801 in which the neutral wire of each single-phase branch is arranged. The second pin 906 of the second cross-layer wire 901 is arranged in the fifth layer of the slot 802 of the stator slot 801 in which the outgoing wire of each single-phase branch is arranged.

[0069] The outgoing wire and the neutral wire of the single-phase branch of the first three-phase branch 2 and the second three-phase branch 3 share the I-Pin wire 903. The first three-phase branch 2 and the second three-phase branch 3 adopt the whole-pitch U-pin wire 902. The cross-layer wire 901 and the outgoing wire are arranged in the same slot, so as to further reduce the types of the cross-layer wire 901 and the outgoing wire. The general wire U-pin wire type adopts the equal-pitch scheme, and the wire type is simple. The number of the overall wire type is small, there is no special-shaped wire, the process is simple, and the production cost is lower.

[0070] As Figure 14The utility model discloses can guarantee stator interphase balance degree less than 1%, and through branch parallel mode, utilize parallel resistance characteristics, and the stator interphase balance degree of branch after parallel is further reduced to 0.5%, far lower than the requirement of 3% of industry standard, so as to realize stator temperature rise optimal, ripple voltage minimum, NVH (Noise (noise), Vibration (vibration), Harshness (sound vibration roughness)) Performance optimal embodiment.

[0071] A generator includes a flat wire stator assembly.

[0072] The specific working process of the utility model is as follows:

[0073] Winding the first three-phase total winding 1 and the second three-phase total winding 101 on the stator structure 8; Y-connecting the first three-phase branch 2 and the second three-phase branch 3 respectively; and parallel connecting the first three-phase branch 2 and the second three-phase branch 3.

[0074] The utility model has been described exemplarily above in combination with the drawings. Obviously, the specific implementation of the utility model is not limited by the above-mentioned mode. As long as various non-essential improvements are made by adopting the method concept and technical solution of the utility model, or the above-mentioned concept and technical solution of the utility model is directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A coil structure, characterized by: The first three-phase total winding (1) and the second three-phase total winding (101) are connected in parallel.

2. A coil structure according to claim 1, characterised in that: The first three-phase branch (2) comprises three single-phase branches, namely a U1 branch (4), a V1 branch (401) and a W1 branch (402); the U1 branch (4), the V1 branch (401) and the W1 branch (402) in the first three-phase branch (2) are connected in Y shape; the second three-phase branch (3) comprises three single-phase branches, namely a U2 branch (5), a V2 branch (501) and a W2 branch (502); the U2 branch (5), the V2 branch (501) and the W2 branch (502) in the second three-phase branch (3) are connected in Y shape.

3. A coil structure according to claim 2, characterised in that: The U1 branch (4) comprises a U1 outgoing line (403) and a U1 neutral line (6); the V1 branch (401) comprises a V1 outgoing line (404) and a V1 neutral line (601); the W1 branch (402) comprises a W1 outgoing line (405) and a W1 neutral line (602); the U2 branch (5) comprises a U2 outgoing line (503) and a U2 neutral line (7); the V2 branch (501) comprises a V2 outgoing line (504) and a V2 neutral line (701); the W2 branch (502) comprises a W2 outgoing line (505) and a W2 neutral line (702); the U1 outgoing line (403) and the U2 outgoing line (503) are connected; the V1 outgoing line (404) and the V2 outgoing line (504) are connected; the W1 outgoing line (405) and the W2 outgoing line (505) are connected; the U1 neutral line (6) is connected with the V1 neutral line (601) and the W1 neutral line (602) respectively; the U2 neutral line (7) is connected with the V2 neutral line (701) and the W2 neutral line (702) respectively.

4. A flat wire stator assembly characterized by: The stator structure (8) comprises a stator slot (801); 2N layers of insertion slots (802) are arranged in the stator slot (801), where N is 1, 2, 3, …; the first three-phase branch (2) is arranged in 2N-1 layers of insertion slots (802); the second three-phase branch (3) is arranged in 2N layers of insertion slots (802).

5. A flat wire stator assembly according to claim 4, wherein: ​ The stator structure (8) comprises a stator core; the stator core is provided with a center hole (803); the center hole (803) is coaxially arranged with the stator core; the U1 outgoing line (403), the V1 outgoing line (404), the W1 outgoing line (405), the U2 outgoing line (503), the V2 outgoing line (504) and the W2 outgoing line (505) are arranged in the insertion slot (802) of the stator slot (801) near or away from one side of the center hole (803).

6. A flat wire stator assembly according to claim 5, wherein: The U1 neutral line (6), the V1 neutral line (601), the W1 neutral line (602), the U2 neutral line (7), the V2 neutral line (701) and the W2 neutral line (702) are arranged in the insertion slot (802) of the stator slot (801) near or away from one side of the center hole (803); the U1 neutral line (6) and the U2 neutral line (7) are arranged in the same stator slot (801); the V1 neutral line (601) and the V2 neutral line (701) are arranged in the same stator slot (801); the W1 neutral line (602) and the W2 neutral line (702) are arranged in the same stator slot (801).

7. A flat wire stator assembly according to any one of claims 5-6, characterized in that: The number of stator slots (801) spanned between the W1 neutral line (602) and the U1 neutral line (6) is the same as the number of stator slots (801) spanned between the W1 neutral line (602) and the V1 neutral line (601); the number of stator slots (801) spanned between the W2 neutral line (702) and the U2 neutral line (7) is the same as the number of stator slots (801) spanned between the W2 neutral line (702) and the V2 neutral line (701).

8. A flat wire stator assembly according to claim 7, wherein: Each single-phase branch in the first three-phase branch (2) and / or the second three-phase branch (3) comprises a wave winding (9); the wave winding (9) is connected with a cross-layer wire (901); each cross-layer wire (901) comprises a first pin (905) and a second pin (906); the outgoing line in the single-phase branch where each cross-layer wire (901) is located is in the same stator slot (801) as the first pin (905) in the cross-layer wire (901); the neutral line in the single-phase branch where each cross-layer wire (901) is located is in the same stator slot (801) as the second pin (906) in the cross-layer wire (901).

9. A flat wire stator assembly according to claim 8, wherein: Each wave winding (9) comprises a U-pin wire (902); the outgoing line and the neutral line of each single-phase branch are I-Pin wires (903).

10. An electrical generator characterized by: The flat wire stator assembly according to any one of claims 4-9. The flat wire stator assembly according to any one of claims 4-9.

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