Flat wire motor stator, flat wire motor and vehicle

Abstract

The application discloses a flat wire motor stator, which comprises a stator winding and a stator core, a plurality of core grooves are arranged in the circumferential direction of the stator core, the stator winding comprises a plurality of phase windings, each phase winding comprises one or more groups of parallel winding circuits, each group of winding circuits comprises parallel branches, each branch comprises coils arranged in the circumferential direction of the stator core in sequence, each coil in each core groove is stacked in m layers in sequence, the coil connection sequence of each branch is from the innermost layer to the outermost layer of the core groove 3, then from the outermost layer to the innermost layer, the coil in the n layer and the n+1 layer is connected from the n layer to the n+1 layer obliquely and then from the n+1 layer to the n layer obliquely, the coil in the n+1 layer and the n layer is connected from the n+1 layer to the n layer obliquely and then from the n layer to the n+1 layer obliquely, n is an odd number, and m is a positive integer. The application further discloses a flat wire motor comprising the flat wire motor stator and a vehicle comprising the flat wire motor. The flat wire motor stator, the flat wire motor and the vehicle have good symmetry, reduced loss, increased efficiency and prolonged service life.

Description

Technical Field

[0001] This invention relates to the field of electric motor technology, and in particular to a flat wire motor stator, a flat wire motor, and a vehicle. Background Technology

[0002] With the rapid development of new energy vehicle technology, the performance requirements for drive motors, as one of the key actuators in electric vehicles, are becoming increasingly stringent. Currently, high speed, lightweight design, and high efficiency have become the development trends for drive motors, placing higher demands on their power density, high-efficiency range, and heat dissipation capabilities.

[0003] Stator windings can be divided into round wire and flat wire. The difference between flat wire motors and round wire motors lies in the forming method of the copper wire. Flat wire is beneficial for improving the slot fill factor of the motor. Generally, the slot fill factor of a round wire motor is around 50%, while that of a flat wire motor can reach over 70%. Increased slot fill factor means that more copper can be filled with the same amount of space, reducing motor resistance and copper losses for the same current. Compared to round wire motors, flat wire motors have a larger contact area between the copper conductors in the slots, resulting in better heat dissipation.

[0004] The winding arrangement and connection method of flat wire motors is one of the challenges in the design of this type of motor. Existing coil arrangement methods generally have the following problems:

[0005] 1) There is an issue of asymmetrical winding branches. If the symmetry of each branch cannot be guaranteed, there will be differences in the motor's back EMF, resistance, inductance, etc., forming a circulating current in the motor, which leads to increased motor losses, reduced efficiency, and localized overheating of the motor.

[0006] 2) The winding connection is relatively complex, making it difficult to ensure that each branch of the stator winding is symmetrical with 3 or 6 branches, and it is also difficult to achieve an odd number of winding layers.

[0007] 3) There are many types of coils, including a large number of non-standard coils. The presence of non-standard coils will increase the difficulty of coil manufacturing, resulting in high manufacturing costs, low production efficiency, and hindering mass production.

[0008] 4) Conventional flat wire motors require complex busbars for winding leads, neutral point connections, etc., and the height of the busbars is higher than the height of the winding ends, which increases the axial length of the motor. Summary of the Invention

[0009] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a flat wire motor stator, flat wire motor and vehicle with good symmetry, reduced loss, increased efficiency and improved service life.

[0010] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0011] A flat wire motor stator includes a stator winding and a stator core. The stator core has multiple core slots circumferentially. The stator winding includes multi-phase windings, each phase winding including one or more sets of parallel winding lines. Each set of winding lines includes three or six parallel branches. Each branch includes coils arranged sequentially and connected in series on the circumferential core slots of the stator core. Each coil in each core slot is stacked in m layers in the depth direction of the core slot. The coil connection sequence of each branch is from the innermost layer to the outermost layer and then from the outermost layer to the innermost layer. The coils from layer n to layer n+1 are diagonally connected from layer n to layer n+1 and then diagonally connected from layer n+1 to layer n. The coils from layer n+1 to layer n are diagonally connected from layer n+1 to layer n and then diagonally connected from layer n to layer n+1. Here, n is an odd number and m is a positive integer.

[0012] As a further improvement to the above technical solution:

[0013] The coil includes a coil body and a bent portion. The coil body includes two parallel slotted portions and a connecting portion connected to one end of the two slotted portions. The bent portion is located at the other end of the two slotted portions and forms a welded end. If m is an even number, the two slotted portions of each coil are located in two adjacent layers respectively. If m is an odd number, the two slotted portions of the coil located on the inner side of the outermost layer are located in two adjacent layers respectively, and the two slotted portions of the coil located on the outermost layer are located in the same layer. Alternatively, the two slotted portions of the coil located on the outer side of the innermost layer are located in two adjacent layers respectively, and the two slotted portions of the coil located on the innermost layer are located in the same layer.

[0014] The number m is even, and two different branches are installed in each of the iron core slots. The coils of the two branches are alternately arranged in the iron core slots.

[0015] The six parallel branches of each winding circuit are designated as branch A, branch B, branch C, branch D, branch E, and branch F, respectively. Branch A includes coils A1-a2, A3-a4, A5-a6, A7-a8, A9-a10, A11-a12, A13-a14, A15-a16, and A17-a18. Branch B includes coils B1-b2, B3-b4, B5-b6, B7-b8, B9-b10, B11-b12, B13-b14, B15-b16, and B17-b18. Branch C includes coils C1-c2, C3-c4, C5-c6, C7-c8, C9-c10, C11-c18, and C11-c18. The fourth branch D includes coils D1-d2, D3-d4, D5-d6, D7-d8, D9-d10, D11-d12, D13-d14, D15-d16, and D17-d18; the fifth branch E includes coils E1-e2, E3-e4, E5-e6, E7-e8, E9-e10, E11-e12, E13-e14, E15-e16, and E17-e18; and the sixth branch F includes coils F1-f2, F3-f4, F5-f6, F7-f8, F9-f10, F11-f12, F13-f14, F15-f16, and F17-f18.

[0016] The two slotted sections of coils A1-a2, A3-a4, and A5-a6 are located in the first and second layers along the slot opening direction at the bottom of the iron core slot, respectively. The two slotted sections of coils A7-a8, A9-a10, and A11-a12 are located in the third and fourth layers along the slot opening direction at the bottom of the iron core slot, respectively. The two slotted sections of coils A13-a14, A15-a16, and A17-a18 are located in the fifth and sixth layers along the slot opening direction at the bottom of the iron core slot, respectively. And so on, until the two slotted sections of the first branch A coil are located in the (m-1)th and mth layers along the slot opening direction at the bottom of the iron core slot, respectively.

[0017] A1-a2 are connected to A3-a4 at the welding end; A3-a4 coil is connected to A5-a6 at the welding end; A5-a6 is connected to A7-a8 at the welding end; A7-a8 is connected to A9-a10 at the welding end; A9-a10 is connected to A11-a12 at the welding end; A11-a12 is connected to A13-a14 at the welding end; A13-a14 is connected to A15-a16 at the welding end; A15-a16 is connected to A17-a18 at the welding end; and so on.

[0018] The two slotted sections of coils B1-b2, B3-b4, and B5-b6 are located in the first and second layers along the slot opening direction at the bottom of the iron core slot, respectively. The two slotted sections of coils B7-b8, B9-b10, and B11-b12 are located in the third and fourth layers along the slot opening direction at the bottom of the iron core slot, respectively. The two slotted sections of coils B13-b14, B15-b16, and B17-b18 are located in the fifth and sixth layers along the slot opening direction at the bottom of the iron core slot, respectively. And so on, until the two slotted sections of the second branch B coil are located in the (m-1)th and mth layers along the slot opening direction at the bottom of the iron core slot, respectively.

[0019] B1-b2 is connected to B3-b4 at the welding end; the B3-b4 coil is connected to B5-b6 at the welding end; B5-b6 is connected to B7-b8 at the welding end; B7-b8 is connected to B9-b10 at the welding end; B9-b10 is connected to B11-b12 at the welding end; B11-b12 is connected to B13-b14 at the welding end; B13-b14 is connected to B15-b16 at the welding end; B15-b16 is connected to B17-b18 at the welding end; and so on.

[0020] The two slotted sections of coils C1-c2, C3-c4, and C5-c6 are located in the first and second layers along the slot opening direction at the bottom of the iron core slot, respectively. The two slotted sections of coils C7-c8, C9-c10, and C11-c12 are located in the third and fourth layers along the slot opening direction at the bottom of the iron core slot, respectively. The two slotted sections of coils C13-c14, C15-c16, and C17-c18 are located in the fifth and sixth layers along the slot opening direction at the bottom of the iron core slot, respectively. And so on, until the two slotted sections of the third branch C coil are located in the (m-1)th and mth layers along the slot opening direction at the bottom of the iron core slot, respectively.

[0021] C1-C2 are connected to C3-C4 at the welding end; C3-C4 coils are connected to C5-C6 at the welding end; C5-C6 are connected to C7-C8 at the welding end; C7-C8 are connected to C9-C10 at the welding end; C9-C10 are connected to C11-C12 at the welding end; C11-C12 are connected to C13-C14 at the welding end; C13-C14 are connected to C15-C16 at the welding end; C15-C16 are connected to C17-C18 at the welding end; and so on.

[0022] The two slot-passing parts of coils D1-d2, D3-d4, and D5-d6 are respectively located in the m-th and m-1-th layers along the slot opening direction of the iron core slot. The two slot-passing parts of coils D7-d8, D9-d10, and D11-d12 are respectively located in the m-2-th and m-3-th layers along the slot opening direction of the iron core slot. The two slot-passing parts of coils D13-d14, D15-d16, and D17-d18 are respectively located in the m-4-th and m-5-th layers along the slot opening direction of the iron core slot. And so on, until the two slot-passing parts of the fourth branch D coil are respectively located in the 2nd and 1st layers along the slot opening direction of the iron core slot.

[0023] D1-d2 are connected to D3-d4 at the welding end; D3-d4 coil is connected to D5-d6 at the welding end; D5-d6 is connected to D7-d8 at the welding end; D7-d8 is connected to D9-d10 at the welding end; D9-d10 is connected to D11-d12 at the welding end; D11-d12 is connected to D13-d14 at the welding end; D13-d14 is connected to D15-d16 at the welding end; D15-d16 is connected to D17-d18 at the welding end; and so on.

[0024] The two slot-passing parts of coils E1-e2, E3-e4, and E5-e6 are respectively located in the m-th and m-1-th layers along the slot opening direction at the bottom of the iron core slot; the two slot-passing parts of coils E7-e8, E9-e10, and E11-e12 are respectively located in the m-2-th and m-3-th layers along the slot opening direction at the bottom of the iron core slot; the two slot-passing parts of coils E13-e14, E15-e16, and E17-e18 are respectively located in the m-4-th and m-5-th layers along the slot opening direction at the bottom of the iron core slot; and so on, until the two slot-passing parts of the fifth branch E coil are respectively located in the 2nd and 1st layers along the slot opening direction at the bottom of the iron core slot.

[0025] E1-e2 are connected to E3-e4 at the soldering end; E3-e4 coils are connected to E5-e6 at the soldering end; E5-e6 are connected to E7-e8 at the soldering end; E7-e8 are connected to E9-e10 at the soldering end; E9-e10 are connected to E11-e12 at the soldering end; E11-e12 are connected to E13-e14 at the soldering end; E13-e14 are connected to E15-e16 at the soldering end; E15-e16 are connected to E17-e18 at the soldering end, and so on.

[0026] The two slot-passing parts of coils F1-f2, F3-f4, and F5-f6 are respectively located in the m-th and m-1-th layers along the slot opening direction of the iron core slot. The two slot-passing parts of coils F7-f8, F9-f10, and F11-f12 are respectively located in the m-2-th and m-3-th layers along the slot opening direction of the iron core slot. The two slot-passing parts of coils F13-f14, F15-f16, and F17-f18 are respectively located in the m-4-th and m-5-th layers along the slot opening direction of the iron core slot. And so on, until the two slot-passing parts of the sixth branch F coil are respectively located in the 2nd and 1st layers along the slot opening direction of the iron core slot.

[0027] F1-f2 are connected to F3-f4 at the soldering end; F3-f4 coil is connected to F5-f6 at the soldering end; F5-f6 is connected to F7-f8 at the soldering end; F7-f8 is connected to F9-f10 at the soldering end; F9-f10 is connected to F11-f12 at the soldering end; F11-f12 is connected to F13-f14 at the soldering end; F13-f14 is connected to F15-f16 at the soldering end; F15-f16 is connected to F17-f18 at the soldering end; and so on.

[0028] The coil connection sequence proceeds from layer 1 to layer m, then back from layer m to layer 1, and so on in a cyclical manner.

[0029] The coil pitches of the first branch A and the second branch B are y, y, y-3 respectively; the coil pitches of the third branch C are y-3, y, y respectively; the coil pitches of the fourth branch D are y-3, y, y respectively; and the coil pitches of the fifth branch E and the sixth branch F are y, y, y-3 respectively, where y is a positive integer.

[0030] In the two iron core slots where each coil is located, one branch is passed through one iron core slot and two different branches are passed through the other iron core slot. The coils of the two different branches are alternately arranged in the iron core slots.

[0031] Where m is an even number, the three parallel branches of each winding line are respectively designated as the first branch A, the second branch B, and the third branch C. The first branch A includes coils A1-a2, A3-a4, A5-a6, A7-a8, A9-a10, A11-a12, A13-a14, A15-a16, and A17-a18. The second branch B includes coils B1-b2, B3-b4, B5-b6, B7-b8, B9-b10, B11-b12, B13-b14, B15-b16, and B17-b18. The third branch C includes coils C1-c2, C3-c4, C5-c6, C7-c8, C9-c10, C11-c12, C13-c14, C15-c16, and C17-c18.

[0032] The two slot-passing portions of coils A1-a2, A3-a4, and A5-a6 are respectively located in the 1st and 2nd layers along the slot opening direction at the bottom of the iron core slot; the two slot-passing portions of coils A7-a8, A9-a10, and A11-a12 are respectively located in the 3rd and 4th layers along the slot opening direction at the bottom of the iron core slot; the two slot-passing portions of coils A13-a14, A15-a16, and A17-a18 are respectively located in the 5th and 6th layers along the slot opening direction at the bottom of the iron core slot, and so on, until the two slot-passing portions of coils A(6m / 2-5)-a(6m / 2-4), A(6m / 2-3)-a(6m / 2-2), and A(6m / 2-1)-a(6m / 2) are respectively located in the (m-1)th and mth layers along the slot opening direction at the bottom of the iron core slot; coil A(6m / 2+1 The two slot-passing parts of coils A(6m / 2+2), A(6m / 2+3)-a(6m / 2+4), and A(6m / 2+5)-a(6m / 2+6) are respectively located in the m-th and m-1-th layers along the slot opening direction at the bottom of the iron core slot. The two slot-passing parts of coils A(6m / 2+7)-a(6m / 2+8), A(6m / 2+9)-a(6m / 2+10), and A(6m / 2+11)-a(6m / 2+12) are respectively located in the m-2-th and m-3-th layers along the slot opening direction at the bottom of the iron core slot. This continues until the two slot-passing parts of coils A(6m-5)-a(6m-4), A(6m-3)-a(6m-2), and A(6m-1)-a(6m) are respectively located in the 2nd and 1st layers along the slot opening direction at the bottom of the iron core slot.

[0033] A1-a2 are connected to A3-a4 at the welding end; A3-a4 coil is connected to A5-a6 at the welding end; A5-a6 is connected to A7-a8 at the welding end; A7-a8 is connected to A9-a10 at the welding end; A9-a10 is connected to A11-a12 at the welding end; A11-a12 is connected to A13-a14 at the welding end; A13-a14 is connected to A15-a16 at the welding end; A15-a16 is connected to A17-a18 at the welding end; and so on.

[0034] The two slot-passing portions of coils B1-b2, B3-b4, and B5-b6 are respectively located in the 1st and 2nd layers along the slot opening direction at the bottom of the iron core slot; the two slot-passing portions of coils B7-b8, B9-b10, and B11-b12 are respectively located in the 3rd and 4th layers along the slot opening direction at the bottom of the iron core slot; the two slot-passing portions of coils B13-b14, B15-b16, and B17-b18 are respectively located in the 5th and 6th layers along the slot opening direction at the bottom of the iron core slot, and so on, until the two slot-passing portions of coils B(6m / 2-5)-b(6m / 2-4), B(6m / 2-3)-b(6m / 2-2), and B(6m / 2-1)-b(6m / 2) are respectively located in the (m-1)th and mth layers along the slot opening direction at the bottom of the iron core slot; coil B(6m / 2+1 The two slot-passing parts of coils B(6m / 2+2), B(6m / 2+3)-b(6m / 2+4), and B(6m / 2+5)-b(6m / 2+6) are respectively located in the m-th and m-1-th layers along the slot opening direction at the bottom of the iron core slot. The two slot-passing parts of coils B(6m / 2+7)-b(6m / 2+8), B(6m / 2+9)-b(6m / 2+10), and B(6m / 2+11)-b(6m / 2+12) are respectively located in the m-2-th and m-3-th layers along the slot opening direction at the bottom of the iron core slot. This continues until the two slot-passing parts of coils B(6m-5)-b(6m-4), B(6m-3)-b(6m-2), and B(6m-1)-b(6m) are respectively located in the 2nd and 1st layers along the slot opening direction at the bottom of the iron core slot.

[0035] B1-b2 is connected to B3-b4 at the welding end; the B3-b4 coil is connected to B5-b6 at the welding end; B5-b6 is connected to B7-b8 at the welding end; B7-b8 is connected to B9-b10 at the welding end; B9-b10 is connected to B11-b12 at the welding end; B11-b12 is connected to B13-b14 at the welding end; B13-b14 is connected to B15-b16 at the welding end; B15-b16 is connected to B17-b18 at the welding end; and so on.

[0036] The two slot-passing portions of coils C1-c2, C3-c4, and C5-c6 are respectively located in the 1st and 2nd layers along the slot opening direction at the bottom of the iron core slot; the two slot-passing portions of coils C7-c8, C9-c10, and C11-c12 are respectively located in the 3rd and 4th layers along the slot opening direction at the bottom of the iron core slot; the two slot-passing portions of coils C13-c14, C15-c16, and C17-c18 are respectively located in the 5th and 6th layers along the slot opening direction at the bottom of the iron core slot, and so on, until the two slot-passing portions of coils C(6m / 2-5)-c(6m / 2-4), C(6m / 2-3)-c(6m / 2-2), and C(6m / 2-1)-c(6m / 2) are respectively located in the (m-1)th and mth layers along the slot opening direction at the bottom of the iron core slot; coil C(6m / 2+1 The two slot-passing parts of coils C(6m / 2+2), C(6m / 2+3)-c(6m / 2+4), and C(6m / 2+5)-c(6m / 2+6) are respectively located in the m-th and m-1-th layers along the slot opening direction at the bottom of the iron core slot. The two slot-passing parts of coils C(6m / 2+7)-c(6m / 2+8), C(6m / 2+9)-c(6m / 2+10), and C(6m / 2+11)-c(6m / 2+12) are respectively located in the m-2-th and m-3-th layers along the slot opening direction at the bottom of the iron core slot. This continues until the two slot-passing parts of coils C(6m-5)-c(6m-4), C(6m-3)-c(6m-2), and C(6m-1)-c(6m) are respectively located in the 2nd and 1st layers along the slot opening direction at the bottom of the iron core slot.

[0037] C1-C2 are connected to C3-C4 at the welding end; C3-C4 coils are connected to C5-C6 at the welding end; C5-C6 are connected to C7-C8 at the welding end; C7-C8 are connected to C9-C10 at the welding end; C9-C10 are connected to C11-C12 at the welding end; C11-C12 are connected to C13-C14 at the welding end; C13-C14 are connected to C15-C16 at the welding end; C15-C16 are connected to C17-C18 at the welding end; and so on.

[0038] The coil connection sequence proceeds from layer 1 to layer m, then back from layer m to layer 1, and so on in a cyclical manner.

[0039] The coil pitches of the first branch A and the second branch B in layers n to n+1 are y, y, y-3 respectively, and the coil pitches of the third branch C are y-3, y, y respectively. The coil pitches of the first branch A in layers n+1 to n are y-3, y, y respectively, and the coil pitches of the second branch B and the third branch C are y, y, y-3 respectively, where y is a positive integer.

[0040] The number m is odd, and the two through-grooves of the innermost or outermost layer are located in the same layer.

[0041] The three parallel branches of each winding line are respectively designated as the first branch A, the second branch B, and the third branch C. The first branch A includes coils A1-a2, A3-a4, A5-a6, A7-a8, A9-a10, A11-a12, A13-a14, A15-a16, and A17-a18. The second branch B includes coils B1-b2, B3-b4, B5-b6, B7-b8, B9-b10, B11-b12, B13-b14, B15-b16, and B17-b18. The third branch C includes coils C1-c2, C3-c4, C5-c6, C7-c8, C9-c10, C11-c12, C13-c14, C15-c16, and C17-c18.

[0042] The two slot-passing portions of coils A1-a2, A3-a4, and A5-a6 are respectively located in the 1st and 2nd layers along the slot opening direction at the bottom of the iron core slot; the two slot-passing portions of coils A7-a8, A9-a10, and A11-a12 are respectively located in the 3rd and 4th layers along the slot opening direction at the bottom of the iron core slot; the two slot-passing portions of coils A13-a14, A15-a16, and A17-a18 are respectively located in the 5th and 6th layers along the slot opening direction at the bottom of the iron core slot, and so on, until coil A[(6m-6) / 2-5]- The two slot-passing portions of coils a[(6m-6) / 2-4], A[(6m-6) / 2-3]-a[(6m-6) / 2-2], and A[(6m-6) / 2-1]-a[(6m-6) / 2] are located at the (m-2)th and (m-1)th layers respectively along the slot opening direction at the bottom of the iron core slot; coils A[(6m-6) / 2+1]-a[(6m-6) / 2+2], A[(6m-6) / 2+3]-a[(6m-6) / 2+4], and A[(6m-6) / 2+5]-a[(6m-6) The two slot-passing portions of coil A[(6m-6) / 2+6] are both located in the m-th layer along the slot opening direction at the bottom of the iron core slot; the two slot-passing portions of coils A[(6m-6) / 2+7]-a[(6m-6) / 2+8], A[(6m-6) / 2+9]-a[(6m-6) / 2+10], and A[(6m-6) / 2+11]-a[(6m-6) / 2+12] are respectively located in the m-1-th and m-2-th layers along the slot opening direction at the bottom of the iron core slot; the two slot-passing portions of coil A[(6m-6) / 2+13]-a[(6m-6) / 2+ 14], A[(6m-6) / 2+15]-a[(6m-6) / 2+16], A[(6m-6) / 2+17]-a[(6m-6) / 2+18] have two slot-passing parts located in the (m-3)th and (m-2)th layers of the core slot along the slot opening direction, respectively, and so on, until the two slot-passing parts of coils A(6m-5)-a(6m-4), A(6m-3)-a(6m-2), A(6m-1)-a(6m) are located in the 2nd and 1st layers of the core slot along the slot opening direction, respectively;

[0043] A1-a2 are connected to A3-a4 at the welding end; A3-a4 coil is connected to A5-a6 at the welding end; A5-a6 is connected to A7-a8 at the welding end; A7-a8 is connected to A9-a10 at the welding end; A9-a10 is connected to A11-a12 at the welding end; A11-a12 is connected to A13-a14 at the welding end; A13-a14 is connected to A15-a16 at the welding end; A15-a16 is connected to A17-a18 at the welding end; and so on.

[0044] The two slot-passing portions of coils B1-b2, B3-b4, and B5-b6 are respectively located in the 1st and 2nd layers along the slot opening direction at the bottom of the iron core slot; the two slot-passing portions of coils B7-b8, B9-b10, and B11-b12 are respectively located in the 3rd and 4th layers along the slot opening direction at the bottom of the iron core slot; the two slot-passing portions of coils B13-b14, B15-b16, and B17-b18 are respectively located in the 5th and 6th layers along the slot opening direction at the bottom of the iron core slot, and so on, until coil B[(6m-6) / 2-5]- The two slot-passing portions of b[(6m-6) / 2-4], B[(6m-6) / 2-3]-b[(6m-6) / 2-2], and B[(6m-6) / 2-1]-b[(6m-6) / 2] are located in the (m-2)th and (m-1)th layers respectively along the slot opening direction at the bottom of the iron core slot; the coils B[(6m-6) / 2+1]-b[(6m-6) / 2+2], B[(6m-6) / 2+3]-b[(6m-6) / 2+4], and B[(6m-6) / 2+5]-b[(6m-6) The two slot-passing portions of coils B[(6m-6) / 2+6] are both located in the m-th layer along the slot opening direction at the bottom of the iron core slot; the two slot-passing portions of coils B[(6m-6) / 2+7]-b[(6m-6) / 2+8], B[(6m-6) / 2+9]-b[(6m-6) / 2+10], and B[(6m-6) / 2+11]-b[(6m-6) / 2+12] are respectively located in the m-1-th and m-2-th layers along the slot opening direction at the bottom of the iron core slot; the two slot-passing portions of coils B[(6m-6) / 2+13]-b[(6m-6) / 2+ 14], B[(6m-6) / 2+15]-b[(6m-6) / 2+16], B[(6m-6) / 2+17]-b[(6m-6) / 2+18] have two slot-passing parts located in the (m-3)th and (m-2)th layers of the core slot along the slot opening direction, respectively, and so on, until the two slot-passing parts of coils B(6m-5)-b(6m-4), B(6m-3)-b(6m-2), B(6m-1)-b(6m) are located in the 2nd and 1st layers of the core slot along the slot opening direction, respectively;

[0045] B1-b2 is connected to B3-b4 at the welding end; the B3-b4 coil is connected to B5-b6 at the welding end; B5-b6 is connected to B7-b8 at the welding end; B7-b8 is connected to B9-b10 at the welding end; B9-b10 is connected to B11-b12 at the welding end; B11-b12 is connected to B13-b14 at the welding end; B13-b14 is connected to B15-b16 at the welding end; B15-b16 is connected to B17-b18 at the welding end; and so on.

[0046] The two slot-passing portions of coils C1-c2, C3-c4, and C5-c6 are respectively located in the 1st and 2nd layers along the slot opening direction at the bottom of the iron core slot; the two slot-passing portions of coils C7-c8, C9-c10, and C11-c12 are respectively located in the 3rd and 4th layers along the slot opening direction at the bottom of the iron core slot; the two slot-passing portions of coils C13-c14, C15-c16, and C17-c18 are respectively located in the 5th and 6th layers along the slot opening direction at the bottom of the iron core slot, and so on, until coil C[(6m-6) / 2-5]- The two slot-passing portions of c[(6m-6) / 2-4], C[(6m-6) / 2-3]-c[(6m-6) / 2-2], and C[(6m-6) / 2-1]-c[(6m-6) / 2] are located in the (m-2)th and (m-1)th layers respectively along the slot opening direction at the bottom of the iron core slot; the coils C[(6m-6) / 2+1]-c[(6m-6) / 2+2], C[(6m-6) / 2+3]-c[(6m-6) / 2+4], and C[(6m-6) / 2+5]-c[(6m-6) The two slot-passing portions of coils C[(6m-6) / 2+6] are both located in the m-th layer along the slot opening direction at the bottom of the iron core slot; the two slot-passing portions of coils C[(6m-6) / 2+7]-c[(6m-6) / 2+8], C[(6m-6) / 2+9]-c[(6m-6) / 2+10], and C[(6m-6) / 2+11]-c[(6m-6) / 2+12] are respectively located in the m-1-th and m-2-th layers along the slot opening direction at the bottom of the iron core slot; the two slot-passing portions of coils C[(6m-6) / 2+13]-c[(6m-6) / 2+ 14], C[(6m-6) / 2+15]-c[(6m-6) / 2+16], C[(6m-6) / 2+17]-c[(6m-6) / 2+18] have two slot-passing parts located in the (m-3)th and (m-2)th layers of the core slot along the slot opening direction, respectively, and so on, until the two slot-passing parts of coils C(6m-5)-c(6m-4), C(6m-3)-c(6m-2), C(6m-1)-c(6m) are located in the 2nd and 1st layers of the core slot along the slot opening direction, respectively;

[0047] C1-C2 are connected to C3-C4 at the welding end; C3-C4 coils are connected to C5-C6 at the welding end; C5-C6 are connected to C7-C8 at the welding end; C7-C8 are connected to C9-C10 at the welding end; C9-C10 are connected to C11-C12 at the welding end; C11-C12 are connected to C13-C14 at the welding end; C13-C14 are connected to C15-C16 at the welding end; C15-C16 are connected to C17-C18 at the welding end; and so on.

[0048] The coil connection sequence proceeds from layer 1 to layer m, then back from layer m to layer 1, and so on.

[0049] The coil pitches of the third branch C are y-3, y, y respectively. The coil pitches of the first branch A in the n+1 layer to the n layer are y-3, y, y respectively. The coil pitches of the second branch B and the third branch C are y, y, y-3 respectively. Here, y is a positive integer.

[0050] The value of y is 10.

[0051] A flat wire motor, comprising the aforementioned flat wire motor stator.

[0052] A vehicle comprising the aforementioned motor.

[0053] Compared with the prior art, the advantages of the present invention are as follows:

[0054] This invention discloses a flat-wire motor stator where the coil connection sequence of each branch is as follows: from the innermost layer of the core slot to the outermost layer, then from the outermost layer to the innermost layer, from layer n to layer n+1, the coil is diagonally connected from layer n to layer n+1, then diagonally connected from layer n+1 to layer n, and so on. This ensures the symmetry of each branch, reduces losses, and extends service life. Furthermore, the coils of each branch of this flat-wire motor stator are wired in a vertically interlocking pattern between every two layers, resulting in fewer coil types, higher wiring efficiency, and easier achievement of symmetry requirements when the number of winding layers is odd.

[0055] The flat wire motor of the present invention includes the above-mentioned flat wire motor stator, and also has the advantages described above for the flat wire motor stator. Moreover, the overall structure is simple, the size is small, and the working stability is high.

[0056] The vehicle of the present invention, including the above-described flat wire motor, also has the advantages described in the flat wire motor stator above. Attached Figure Description

[0057] Figure 1 This is a three-dimensional structural diagram of the stator of the flat wire motor of the present invention with the connecting part facing upwards.

[0058] Figure 2 This is a three-dimensional structural diagram of the stator of the flat wire motor of the present invention with the welded end facing upwards.

[0059] Figure 3 This is a three-dimensional structural diagram of the stator winding of an embodiment of the flat wire motor stator of the present invention.

[0060] Figure 4 This is a wiring diagram of the stator winding of the flat wire motor stator of the present invention in Embodiment 1.

[0061] Figure 5 This is a schematic diagram of the coil structure of the flat wire motor stator of the present invention.

[0062] Figure 6 This is a schematic diagram of the coil group structure of an embodiment of the flat wire motor stator of the present invention.

[0063] Figure 7 This is a schematic diagram of the stator winding arrangement of the flat wire motor stator of the present invention in Embodiment 1.

[0064] Figure 8 This is a wiring diagram of the stator winding of the flat wire motor stator of the present invention in Embodiment 1.

[0065] Figure 9 This is a three-dimensional structural diagram of the stator of the flat wire motor of the present invention with the welded end facing upwards, according to Embodiment 2.

[0066] Figure 10 This is a three-dimensional structural diagram of the stator winding of a second embodiment of the flat wire motor stator of the present invention.

[0067] Figure 11 This is a wiring diagram of the stator winding of the flat wire motor stator of the present invention in Embodiment 2.

[0068] Figure 12 This is a schematic diagram of the coil assembly of a second embodiment of the flat wire motor stator of the present invention.

[0069] Figure 13 This is a schematic diagram of another structure of the coil assembly in Embodiment 2 of the flat wire motor stator of the present invention.

[0070] Figure 14 This is a schematic diagram of the stator winding arrangement of the flat wire motor stator of the present invention in Embodiment 2.

[0071] Figure 15 This is a wiring diagram of the stator winding of the flat wire motor stator of the present invention in Embodiment 2.

[0072] Figure 16 This is a three-dimensional structural diagram of the stator of the flat wire motor of the present invention with the connecting part facing upwards, according to Embodiment 3.

[0073] Figure 17 This is a three-dimensional structural diagram of the stator of the flat wire motor of the present invention with the welded end facing upwards, according to Embodiment 3.

[0074] Figure 18 This is a three-dimensional structural diagram of the stator winding of Embodiment 3 of the flat wire motor stator of the present invention.

[0075] Figure 19 This is a schematic diagram of the coil assembly of a third embodiment of the flat wire motor stator of the present invention.

[0076] Figure 20 This is a schematic diagram of another structure of the coil group in Embodiment 3 of the flat wire motor stator of the present invention.

[0077] Figure 21 This is a schematic diagram of the stator winding arrangement of the flat wire motor stator of the present invention in Embodiment 3.

[0078] Figure 22 This is a wiring diagram of the stator winding of the flat wire motor stator of the present invention in Embodiment 3.

[0079] Figure 23 This is a wiring diagram of the stator winding of the flat wire motor stator of the present invention in Embodiment 3.

[0080] The labels in the diagram represent:

[0081] 1. Stator winding; 11. Coil body; 111. Through slot; 112. Connecting part; 12. Bending part; 2. Stator core; 3. Core slot. Detailed Implementation

[0082] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0083] Example 1:

[0084] Figures 1 to 8 This invention illustrates an embodiment of the flat wire motor stator. The flat wire motor stator of this embodiment includes a stator winding 1 and a stator core 2. The stator core 2 has multiple core slots 3 arranged circumferentially. The stator winding 1 includes multi-phase windings, each phase winding including one or more sets of parallel winding lines. Each set of winding lines includes three or six parallel branches. Each branch includes coils arranged sequentially and connected in series on the circumferential core slots of the stator core 2. Each coil in each core slot 3 is stacked m layers deep in the core slot 3. The coil connection sequence of each branch is from the innermost layer to the outermost layer and then from the outermost layer to the innermost layer, from layer n to layer n+1, diagonally connected from layer n to layer n+1, diagonally connected from layer n+1 to layer n, from layer n+1 to layer n, diagonally connected from layer n+1 to layer n, and so on. Here, n is an odd number and m is a positive integer.

[0085] In this flat-wire motor stator, the coil connection sequence for each branch is as follows: from the innermost layer to the outermost layer of core slot 3, then from the outermost layer to the innermost layer, from layer n to layer n+1, then diagonally connecting layer n+1 to layer n, then diagonally connecting layer n+1 to layer n, and so on. This ensures the symmetry of each branch, reduces losses, and extends service life. Furthermore, the coils in each branch of this flat-wire motor stator form a vertically interlocking wiring pattern between every two layers, resulting in fewer coil types, higher wiring efficiency, and easier achievement of symmetry requirements for an odd number of winding layers.

[0086] In this embodiment, as Figure 5 and Figure 6 As shown, the coil includes a coil body 11 and a bending portion 12. The coil body 11 includes two parallel through-slot portions 111 and a connecting portion 112 connected to one end of the two through-slot portions 111. The bending portion 12 is located at the other end of the two through-slot portions 111 and forms a welding end. m is an even number, and the two through-slot portions 111 of each coil are located in two adjacent layers. The connecting portion 112 is V-shaped or arc-shaped, making the coil body 11 U-shaped or V-shaped. Since all coils use the same type (U-shaped or V-shaped), dissimilar coils and bridging coils are eliminated, reducing the variety of coil types, thereby facilitating assembly and mass production, and improving production efficiency.

[0087] In this embodiment, as Figure 7 and Figure 8 As shown, each core slot 3 has two different branches, and the coils of the two branches are alternately arranged in the core slot 3. In this way, the number of coils in each branch in each core slot 3 is the same, which improves the symmetry.

[0088] In this embodiment, the six parallel branches of each winding line are respectively designated as branch A, branch B, branch C, branch D, branch E, and branch F. Branch A includes coils A1-a2, A3-a4, A5-a6, A7-a8, A9-a10, A11-a12, A13-a14, A15-a16, and A17-a18. Branch B includes coils B1-b2, B3-b4, B5-b6, B7-b8, B9-b10, B11-b12, B13-b14, B15-b16, and B17-b18. Branch C includes coils C1-c2, C3-c4, C5-c6, C7-c8, C9-c10, and C1... 1-c12, C13-c14, C15-c16, C17-c18; the fourth branch D includes coils D1-d2, D3-d4, D5-d6, D7-d8, D9-d10, D11-d12, D13-d14, D15-d16, D17-d18; the fifth branch E includes coils E1-e2, E3-e4, E5-e6, E7-e8, E9-e10, E11-e12, E13-e14, E15-e16, E17-e18; the sixth branch F includes coils F1-f2, F3-f4, F5-f6, F7-f8, F9-f10, F11-f12, F13-f14, F15-f16, F17-f18;

[0089] The two slot-penetrating portions 111 of coils A1-a2, A3-a4, and A5-a6 are located in the first and second layers along the slot opening direction of the inner core slot 3, respectively. The two slot-penetrating portions 111 of coils A7-a8, A9-a10, and A11-a12 are located in the third and fourth layers along the slot opening direction of the inner core slot 3, respectively. The two slot-penetrating portions 111 of coils A13-a14, A15-a16, and A17-a18 are located in the fifth and sixth layers along the slot opening direction of the inner core slot 3, respectively. And so on, until the two slot-penetrating portions 111 of the first branch A coil are located in the (m-1)th and mth layers along the slot opening direction of the inner core slot 3, respectively.

[0090] A1-a2 are connected to A3-a4 at the welding end; A3-a4 coil is connected to A5-a6 at the welding end; A5-a6 is connected to A7-a8 at the welding end; A7-a8 is connected to A9-a10 at the welding end; A9-a10 is connected to A11-a12 at the welding end; A11-a12 is connected to A13-a14 at the welding end; A13-a14 is connected to A15-a16 at the welding end; A15-a16 is connected to A17-a18 at the welding end; and so on.

[0091] The two slot-penetrating portions 111 of coils B1-b2, B3-b4, and B5-b6 are located in the first and second layers along the slot opening direction of the inner core slot 3, respectively. The two slot-penetrating portions 111 of coils B7-b8, B9-b10, and B11-b12 are located in the third and fourth layers along the slot opening direction of the inner core slot 3, respectively. The two slot-penetrating portions 111 of coils B13-b14, B15-b16, and B17-b18 are located in the fifth and sixth layers along the slot opening direction of the inner core slot 3, respectively. And so on, until the two slot-penetrating portions 111 of the second branch B coil are located in the (m-1)th and mth layers along the slot opening direction of the inner core slot 3, respectively.

[0092] B1-b2 is connected to B3-b4 at the welding end; the B3-b4 coil is connected to B5-b6 at the welding end; B5-b6 is connected to B7-b8 at the welding end; B7-b8 is connected to B9-b10 at the welding end; B9-b10 is connected to B11-b12 at the welding end; B11-b12 is connected to B13-b14 at the welding end; B13-b14 is connected to B15-b16 at the welding end; B15-b16 is connected to B17-b18 at the welding end; and so on.

[0093] The two slot-passing portions 111 of coils C1-c2, C3-c4, and C5-c6 are located in the 1st and 2nd layers along the slot opening direction of the inner core slot 3, respectively. The two slot-passing portions 111 of coils C7-c8, C9-c10, and C11-c12 are located in the 3rd and 4th layers along the slot opening direction of the inner core slot 3, respectively. The two slot-passing portions 111 of coils C13-c14, C15-c16, and C17-c18 are located in the 5th and 6th layers along the slot opening direction of the inner core slot 3, respectively. And so on, until the two slot-passing portions 111 of the third branch C coil are located in the (m-1)th and mth layers along the slot opening direction of the inner core slot 3, respectively.

[0094] C1-C2 are connected to C3-C4 at the welding end; C3-C4 coils are connected to C5-C6 at the welding end; C5-C6 are connected to C7-C8 at the welding end; C7-C8 are connected to C9-C10 at the welding end; C9-C10 are connected to C11-C12 at the welding end; C11-C12 are connected to C13-C14 at the welding end; C13-C14 are connected to C15-C16 at the welding end; C15-C16 are connected to C17-C18 at the welding end; and so on.

[0095] The two slot-penetrating portions 111 of coils D1-d2, D3-d4, and D5-d6 are located in the m-th and m-1-th layers along the slot opening direction of the inner core slot 3, respectively. The two slot-penetrating portions 111 of coils D7-d8, D9-d10, and D11-d12 are located in the m-2-th and m-3-th layers along the slot opening direction of the inner core slot 3, respectively. The two slot-penetrating portions 111 of coils D13-d14, D15-d16, and D17-d18 are located in the m-4-th and m-5-th layers along the slot opening direction of the inner core slot 3, respectively. And so on, until the two slot-penetrating portions 111 of the fourth branch D coil are located in the 2nd and 1st layers along the slot opening direction of the inner core slot 3, respectively.

[0096] D1-d2 are connected to D3-d4 at the welding end; D3-d4 coil is connected to D5-d6 at the welding end; D5-d6 is connected to D7-d8 at the welding end; D7-d8 is connected to D9-d10 at the welding end; D9-d10 is connected to D11-d12 at the welding end; D11-d12 is connected to D13-d14 at the welding end; D13-d14 is connected to D15-d16 at the welding end; D15-d16 is connected to D17-d18 at the welding end; and so on.

[0097] The two slot-penetrating portions 111 of coils E1-e2, E3-e4, and E5-e6 are located in the m-th and m-1-th layers along the slot opening direction of the inner core slot 3, respectively. The two slot-penetrating portions 111 of coils E7-e8, E9-e10, and E11-e12 are located in the m-2-th and m-3-th layers along the slot opening direction of the inner core slot 3, respectively. The two slot-penetrating portions 111 of coils E13-e14, E15-e16, and E17-e18 are located in the m-4-th and m-5-th layers along the slot opening direction of the inner core slot 3, respectively. And so on, until the two slot-penetrating portions 111 of the fifth branch E coil are located in the 2nd and 1st layers along the slot opening direction of the inner core slot 3, respectively.

[0098] E1-e2 are connected to E3-e4 at the soldering end; E3-e4 coils are connected to E5-e6 at the soldering end; E5-e6 are connected to E7-e8 at the soldering end; E7-e8 are connected to E9-e10 at the soldering end; E9-e10 are connected to E11-e12 at the soldering end; E11-e12 are connected to E13-e14 at the soldering end; E13-e14 are connected to E15-e16 at the soldering end; E15-e16 are connected to E17-e18 at the soldering end, and so on.

[0099] The two slot-penetrating portions 111 of coils F1-f2, F3-f4, and F5-f6 are located in the m-th and m-1-th layers along the slot opening direction of the inner core slot 3, respectively. The two slot-penetrating portions 111 of coils F7-f8, F9-f10, and F11-f12 are located in the m-2-th and m-3-th layers along the slot opening direction of the inner core slot 3, respectively. The two slot-penetrating portions 111 of coils F13-f14, F15-f16, and F17-f18 are located in the m-4-th and m-5-th layers along the slot opening direction of the inner core slot 3, respectively. And so on, until the two slot-penetrating portions 111 of the sixth branch F coil are located in the 2nd and 1st layers along the slot opening direction of the inner core slot 3, respectively.

[0100] F1-f2 are connected to F3-f4 at the soldering end; F3-f4 coil is connected to F5-f6 at the soldering end; F5-f6 is connected to F7-f8 at the soldering end; F7-f8 is connected to F9-f10 at the soldering end; F9-f10 is connected to F11-f12 at the soldering end; F11-f12 is connected to F13-f14 at the soldering end; F13-f14 is connected to F15-f16 at the soldering end; F15-f16 is connected to F17-f18 at the soldering end; and so on.

[0101] The coil connection sequence proceeds from layer 1 to layer m, then back from layer m to layer 1, and so on in a cyclical manner.

[0102] The coil pitches of the first branch A and the second branch B are y, y, y-3 respectively; the coil pitches of the third branch C are y-3, y, y respectively; the coil pitches of the fourth branch D are y-3, y, y respectively; and the coil pitches of the fifth branch E and the sixth branch F are y, y, y-3 respectively, where y is a positive integer.

[0103] Specifically, taking a 10-layer flat wire motor with 54 slots, 6 poles, and 6 branches as an example, the number of coil layers increases sequentially from the bottom of the slot to the top, i.e., from the first layer to the tenth layer (in other embodiments, it can also be set to six, eight, twelve, or more layers). The U-phase winding wiring diagram is as follows. Figure 7 and 8As shown, the six parallel branches of each winding circuit are designated as branch A, branch B, branch C, branch D, branch E, and branch F, respectively. Coils A1-a2, A3-a4, A5-a6, A7-a8, A9-a10, A11-a12, A13-a14, A15-a16, A17-a18, A19-a20, A21-a22, A13-a24, A25-a26, A27-a28, and A29-a30 are connected sequentially to form branch A. Coils B1-b2, B3-b4, B5-a30 are connected sequentially to form branch F. B6, B7-b8, B9-b10, B11-b12, B13-b14, B15-b16, B17-b18, B19-b20, B21-b22, B23-b24, B25-b26, B27-b28, and B29-b30 are connected sequentially to form the second branch B. Coils C1-c2, C3-c4, C5-c6, C7-c8, C9-c10, C11-c12, C13-c14, C15-c16, C17-c18, C19-c20, C21-c22, C23-c24, and C25-c30 are connected sequentially to form the second branch B. 26. C27-C28 and C29-C30 are connected in sequence to form the third branch C. Coils D1-D2, D3-D4, D5-D6, D7-D8, D9-D10, D11-D12, D13-D14, D15-D16, D17-D18, D19-D20, D21-D22, D23-D24, D25-D26, D27-D28, and D29-D30 are connected in sequence to form the fourth branch D. Coils E1-E2, E3-E4, E5-E6, E7-E8, E9-E10, E11-E12, and E13-E1 4. E15-e16, E17-e18, E19-e20, E21-e22, E23-e24, E25-e26, E27-e28, and E29-e30 are connected sequentially to form the fifth branch E. Coils F1-f2, F3-f4, F5-f6, F7-f8, F9-f10, F11-f12, F13-f14, F15-f16, F17-f18, F19-f20, F21-f22, F23-f24, F25-f26, F27-f28, and F29-f30 are connected sequentially to form the sixth branch F. A1-a2, B1-b2, and C1-c2 form a coil group (e.g., ...). Figure 6 As shown), D1-d2, E1-e2, and F1-f2 form a coil group. From... Figure 6As can be seen, coils A1-a2 and B1-b2 have a pitch of 10, and coil C1-c2 has a pitch of 7, forming one coil group. Other coil groups have the same span and combination as this group, connected by welding at the other end of the winding, and so on. The twisting direction of the lead wires in each branch is not specified. A1-a2, A3-a4, and A5-a6 form one turn, and so on. Figure 8 In the diagram, the first branch A, the second branch B, the third branch C, the fourth branch D, the fifth branch E, and the sixth branch F are respectively denoted as branch 1, branch 2, branch 3, branch 4, branch 5, and branch 6.

[0104] Taking branch 1 as an example, the upper and lower edges of coils A1-a2, A3-a4, and A5-a6 (the two slots 111 of the coil are denoted as the upper and lower edges, respectively) are located in the 1st and 2nd layers, respectively; the upper and lower edges of coils A7-a8, A9-a10, and A11-a12 are located in the 3rd and 4th layers, respectively; the upper and lower edges of coils A13-a14, A15-a16, and A17-a18 are located in the 5th and 6th layers, respectively; the upper and lower edges of coils A19-a20, A21-a22, and A23-a24 are located in the 7th and 8th layers, respectively; and the upper and lower edges of coils A25-a26, A27-a28, and A29-a30 are located in the 9th and 10th layers, respectively. The coils are connected sequentially from layer 1 to layer 10. Branches 2 and 3 are connected in a similar manner to branch 1.

[0105] Taking branch 4 as an example, the upper and lower edges of coils D1-d2, D3-d4, and D5-d6 (the two slots 111 of the coil are denoted as the upper and lower edges respectively) are located in the 10th and 9th layers respectively; the upper and lower edges of coils D7-d8, D9-d10, and D11-d12 are located in the 8th and 7th layers respectively; the upper and lower edges of coils D13-d14, D15-d16, and D17-d18 are located in the 6th and 5th layers respectively; the upper and lower edges of coils D19-d20, D21-d22, and D23-d24 are located in the 4th and 3rd layers respectively; and the upper and lower edges of coils D25-d26, D27-d28, and D29-d30 are located in the 2nd and 1st layers respectively. The coil connection sequence starts from layer 10 and connects sequentially to layer 1. Branches 5 and 6 are similar to branch 4. The wiring diagram of the stator of this flat wire motor is shown below. Figure 4 As shown.

[0106] The innermost layer of core slot 3 is the first layer from the bottom of the slot to the opening, and the outermost layer is the last layer from the bottom of the slot to the opening. The neutral point of each coil (e.g.) Figure 7As shown, a30, b30, c30, d30, e30, and f30 are connected by a copper busbar. The height of the copper busbar does not exceed the height of the coil welding end, which not only simplifies the structure but also reduces the height of the winding end, thereby reducing the size of the motor.

[0107] The stator of this flat wire motor consists entirely of U-shaped coils, eliminating the need for non-standard coils and bridging coils, which facilitates mass production.

[0108] Example 2:

[0109] Figures 9 to 15 This paper illustrates a second embodiment of the flat wire motor stator of the present invention. The flat wire motor stator of this embodiment includes a stator winding 1 and a stator core 2. The stator core 2 has multiple core slots 3 arranged circumferentially. The stator winding 1 includes multi-phase windings. Each phase winding includes one or more sets of parallel winding lines. Each set of winding lines includes three or six parallel branches. Each branch includes coils arranged sequentially and connected in series on the circumferential core slots of the stator core 2. Each coil in each core slot 3 is stacked m layers in the depth direction of the core slot 3. The coil connection sequence of each branch is from the innermost layer to the outermost layer and then from the outermost layer to the innermost layer, from layer n to layer n+1, diagonally connected from layer n to layer n+1, diagonally connected from layer n+1 to layer n, from layer n+1 to layer n, diagonally connected from layer n+1 to layer n, and diagonally connected from layer n+1 to layer n+1. Here, n is an odd number and m is a positive integer.

[0110] In this flat-wire motor stator, the coil connection sequence for each branch is as follows: from the innermost layer to the outermost layer of core slot 3, then from the outermost layer to the innermost layer, from layer n to layer n+1, then diagonally connecting layer n+1 to layer n, then diagonally connecting layer n+1 to layer n, and so on. This ensures the symmetry of each branch, reduces losses, and extends service life. Furthermore, the coils in each branch of this flat-wire motor stator form a vertically interlocking wiring pattern between every two layers, resulting in fewer coil types, higher wiring efficiency, and easier achievement of symmetry requirements for an odd number of winding layers.

[0111] In this embodiment, the coil includes a coil body 11 and a bending portion 12. The coil body 11 includes two parallel through-slot portions 111 and a connecting portion 112 connected to one end of the two through-slot portions 111. The bending portion 12 is located at the other end of the two through-slot portions 111 and forms a welding end. If m is an even number, the two through-slot portions 111 of each coil are located in two adjacent layers respectively; if m is an odd number, the two through-slot portions 111 of the coil located on the innermost side of the outermost layer are located in two adjacent layers respectively, and the two through-slot portions 111 of the coil located on the outermost layer are located in the same layer; or the two through-slot portions of the coil located on the outermost side of the innermost layer are located in two adjacent layers respectively, and the two through-slot portions of the coil located on the innermost layer are located in the same layer. The connecting portion 112 is V-shaped or arc-shaped, making the coil body 11 U-shaped or V-shaped. Since all coils use the same type (U-shaped or V-shaped), heterogeneous coils and bridging coils are eliminated, reducing the variety of coil types, thereby facilitating assembly and mass production, and improving production efficiency.

[0112] In this embodiment, m is an even number. In the two core slots 3 where each coil is located, one core slot 3 has one branch, and the other core slot 3 has two different branches. The coils of the two different branches are alternately arranged in the core slots 3. In this way, the number of coils in each branch in each core slot 3 is the same, which improves the symmetry.

[0113] In this embodiment, the three parallel branches of each winding line are respectively designated as the first branch A, the second branch B, and the third branch C. The first branch A includes coils A1-a2, A3-a4, A5-a6, A7-a8, A9-a10, A11-a12, A13-a14, A15-a16, and A17-a18. The second branch B includes coils B1-b2, B3-b4, B5-b6, B7-b8, B9-b10, B11-b12, B13-b14, B15-b16, and B17-b18. The third branch C includes coils C1-c2, C3-c4, C5-c6, C7-c8, C9-c10, C11-c12, C13-c14, C15-c16, and C17-c18.

[0114] The two through-slot portions 111 of coils A1-a2, A3-a4, and A5-a6 are located in the first and second layers along the slot opening direction of the inner core slot 3, respectively. The two through-slot portions 111 of coils A7-a8, A9-a10, and A11-a12 are located in the third and fourth layers along the slot opening direction of the inner core slot 3, respectively. The two through-slot portions 111 of coils A13-a14, A15-a16, and A17-a18 are located in the second and third layers along the slot opening direction of the inner core slot 3, respectively. Parts 111 are located in the 5th and 6th layers along the slot opening direction at the bottom of the iron core slot 3, respectively, and so on, until the two slot-passing parts 111 of coils A(6m / 2-5)-a(6m / 2-4), A(6m / 2-3)-a(6m / 2-2), and A(6m / 2-1)-a(6m / 2) are located in the (m-1)th and mth layers along the slot opening direction at the bottom of the iron core slot 3, respectively; coil A(6m / 2 +1)-a(6m / 2+2), A(6m / 2+3)-a(6m / 2+4), A(6m / 2+5)-a(6m / 2+6) have two slot-passing parts 111 located in the m-th and m-1-th layers of the core slot 3 along the slot opening direction at the bottom of the slot, respectively. The coils A(6m / 2+7)-a(6m / 2+8), A(6m / 2+9)-a(6m / 2+10), A(6m / 2+1 1) The two slot-passing parts 111 of -a(6m / 2+12) are located in the m-2 and m-3 layers of the core slot 3 along the slot opening direction, respectively, and so on, until the two slot-passing parts 111 of coils A(6m-5)-a(6m-4), A(6m-3)-a(6m-2), and A(6m-1)-a(6m) are located in the 2nd and 1st layers of the core slot 3 along the slot opening direction, respectively;

[0115] A1-a2 are connected to A3-a4 at the welding end; A3-a4 coil is connected to A5-a6 at the welding end; A5-a6 is connected to A7-a8 at the welding end; A7-a8 is connected to A9-a10 at the welding end; A9-a10 is connected to A11-a12 at the welding end; A11-a12 is connected to A13-a14 at the welding end; A13-a14 is connected to A15-a16 at the welding end; A15-a16 is connected to A17-a18 at the welding end; and so on.

[0116] The two through-slot portions 111 of coils B1-b2, B3-b4, and B5-b6 are located in the first and second layers along the slot opening direction of the inner core slot 3, respectively. The two through-slot portions 111 of coils B7-b8, B9-b10, and B11-b12 are located in the third and fourth layers along the slot opening direction of the inner core slot 3, respectively. The two through-slot portions 111 of coils B13-b14, B15-b16, and B17-b18 are located in the second and third layers along the slot opening direction of the inner core slot 3, respectively. Parts 111 are located in the 5th and 6th layers along the slot opening direction at the bottom of the iron core slot 3, respectively, and so on, until the two slot-passing parts 111 of coils B(6m / 2-5)-b(6m / 2-4), B(6m / 2-3)-b(6m / 2-2), and B(6m / 2-1)-b(6m / 2) are located in the (m-1)th and mth layers along the slot opening direction at the bottom of the iron core slot 3, respectively; coil B(6m / 2 +1)-b(6m / 2+2), B(6m / 2+3)-b(6m / 2+4), B(6m / 2+5)-b(6m / 2+6) have two slot-passing parts 111 located in the m-th and m-1-th layers of the core slot 3 along the slot opening direction at the bottom of the slot, respectively. The coils B(6m / 2+7)-b(6m / 2+8), B(6m / 2+9)-b(6m / 2+10), B(6m / 2+1 1) The two slot-passing parts 111 of B(6m / 2+12) are located in the m-2 and m-3 layers of the core slot 3 along the slot opening direction, respectively, and so on, until the two slot-passing parts 111 of coils B(6m-5)-b(6m-4), B(6m-3)-b(6m-2), and B(6m-1)-b(6m) are located in the 2nd and 1st layers of the core slot 3 along the slot opening direction, respectively;

[0117] B1-b2 is connected to B3-b4 at the welding end; the B3-b4 coil is connected to B5-b6 at the welding end; B5-b6 is connected to B7-b8 at the welding end; B7-b8 is connected to B9-b10 at the welding end; B9-b10 is connected to B11-b12 at the welding end; B11-b12 is connected to B13-b14 at the welding end; B13-b14 is connected to B15-b16 at the welding end; B15-b16 is connected to B17-b18 at the welding end; and so on.

[0118] The two through-slot portions 111 of coils C1-c2, C3-c4, and C5-c6 are located in the first and second layers along the slot opening direction of the inner core slot 3, respectively. The two through-slot portions 111 of coils C7-c8, C9-c10, and C11-c12 are located in the third and fourth layers along the slot opening direction of the inner core slot 3, respectively. The two through-slot portions 111 of coils C13-c14, C15-c16, and C17-c18 are located in the second and third layers along the slot opening direction of the inner core slot 3, respectively. Parts 111 are located in the 5th and 6th layers along the slot opening direction at the bottom of the iron core slot 3, respectively, and so on, until the two slot-passing parts 111 of coils C(6m / 2-5)-c(6m / 2-4), C(6m / 2-3)-c(6m / 2-2), and C(6m / 2-1)-c(6m / 2) are located in the (m-1)th and mth layers along the slot opening direction at the bottom of the iron core slot 3, respectively; coil C(6m / 2 +1)-c(6m / 2+2), C(6m / 2+3)-c(6m / 2+4), C(6m / 2+5)-c(6m / 2+6) have two slot-passing parts 111 located in the m-th and m-1-th layers of the core slot 3 along the slot opening direction at the bottom of the slot, respectively. The coils C(6m / 2+7)-c(6m / 2+8), C(6m / 2+9)-c(6m / 2+10), C(6m / 2+1 1) The two slot-passing parts 111 of C(6m / 2+12) are located in the m-2 and m-3 layers of the core slot 3 along the slot opening direction, respectively, and so on, until the two slot-passing parts 111 of coils C(6m-5)-c(6m-4), C(6m-3)-c(6m-2), and C(6m-1)-c(6m) are located in the 2nd and 1st layers of the core slot 3 along the slot opening direction, respectively;

[0119] C1-C2 are connected to C3-C4 at the welding end; C3-C4 coils are connected to C5-C6 at the welding end; C5-C6 are connected to C7-C8 at the welding end; C7-C8 are connected to C9-C10 at the welding end; C9-C10 are connected to C11-C12 at the welding end; C11-C12 are connected to C13-C14 at the welding end; C13-C14 are connected to C15-C16 at the welding end; C15-C16 are connected to C17-C18 at the welding end; and so on.

[0120] The coil connection sequence proceeds from layer 1 to layer m, then back from layer m to layer 1, and so on in a cyclical manner.

[0121] The coil pitches of the first branch A and the second branch B in the n+1 layer are y, y, y-3 respectively, and the coil pitches of the third branch C are y-3, y, y respectively. The coil pitches of the first branch A in the n+1 layer are y-3, y, y respectively, and the coil pitches of the second branch B and the third branch C are y, y, y-3 respectively, where y is a positive integer.

[0122] Specifically, taking a 54-slot, 6-pole, 3-branch, 10-layer flat wire motor as an example, the number of coil layers increases sequentially from the slot opening to the bottom of the slot from 1 to 10 (m=10), and vice versa. Select one phase of the three-phase winding; the specific winding arrangement is as follows... Figure 14 and Figure 15 As shown. The branches are represented by A, B, and C respectively. A1-a2, A3-a4, and A5-a6 form one loop, and so on. A1-a2, B1-b2, and C1-c2 form a coil group (e.g., ...). Figure 12 As shown), from Figure 12 As can be seen, the coil pitch of A1-a2 and B1-b2 is 10, and the coil pitch of C1-c2 is 7; the other coil group types have the same coil span and combination as this group, and are connected by welding at the other end of the winding, and so on. Figure 15 In the diagram, the first branch A, the second branch B, and the third branch C are denoted as branch 1, branch 2, and branch 3, respectively.

[0123] Taking branch 1 as an example, the upper and lower edges of coils A1-a2, A3-a4, and A5-a6 (the two slots 111 of the coil are denoted as the upper and lower edges, respectively) are located in the 1st and 2nd layers, respectively; the upper and lower edges of coils A7-a8, A9-a10, and A11-a12 are located in the 3rd and 4th layers, respectively; the upper and lower edges of coils A13-a14, A15-a16, and A17-a18 are located in the 5th and 6th layers, respectively; the upper and lower edges of coils A19-a20, A21-a22, and A23-a24 are located in the 7th and 8th layers, respectively; and the upper and lower edges of coils A25-a26, A27-a28, and A29-a30 are located in the 9th and 10th layers, respectively. The coils are connected sequentially from layer 1 to layer 10, and then bridging is achieved by changing the twisting direction of coils A31-A32, as follows. Figure 13 As shown; the coil connection sequence starts from the 10th layer and then connects to the 1st layer sequentially, and the other branches are similar to branch 1.

[0124] For coil groups with the same twisting direction at the jumper welding ends in layers 9-10, such as... Figure 13 Taking all other winding weld ends with the reverse twisted heads facing both ends as an example, the motor stator weld ends are respectively as follows: Figure 9 As shown, its winding connection diagram is as follows: Figure 14 As shown. The position of the lead wires for the three-phase windings is not required; the winding connection method is the same, and the windings are embedded... Figure 11 As shown.

[0125] The innermost layer of core slot 3 is the first layer from the bottom of the slot to the opening, and the outermost layer is the last layer from the bottom of the slot to the opening. The neutral point of each coil (e.g.) Figure 15As shown, coils a60, b60, and c60 are connected via copper busbars. The height of the copper busbars does not exceed the height of the coil welding ends, which not only simplifies the structure but also reduces the height of the winding ends, thereby reducing the size of the motor. All coils consist of U-shaped coils, eliminating non-standard coils and bridging coils, facilitating mass production.

[0126] Example 3:

[0127] Figures 16 to 23 This paper illustrates a third embodiment of the flat wire motor stator of the present invention. The flat wire motor stator of this embodiment includes a stator winding 1 and a stator core 2. The stator core 2 has multiple core slots 3 arranged circumferentially. The stator winding 1 includes multi-phase windings. Each phase winding includes one or more sets of parallel winding lines. Each set of winding lines includes three or six parallel branches. Each branch includes coils arranged sequentially and connected in series on the circumferential core slots of the stator core 2. Each coil in each core slot 3 is stacked in m layers in the depth direction of the core slot 3. The coil connection sequence of each branch is from the innermost layer to the outermost layer and then from the outermost layer to the innermost layer, from layer n to layer n+1, from layer n diagonally connected to layer n+1 and then from layer n+1 diagonally connected to layer n, from layer n+1 to layer n, and from layer n+1 diagonally connected to layer n and then from layer n+1 diagonally connected to layer n+1. Here, n is an odd number and m is a positive integer.

[0128] In this flat-wire motor stator, the coil connection sequence for each branch is as follows: from the innermost layer to the outermost layer of core slot 3, then from the outermost layer to the innermost layer, from layer n to layer n+1, then diagonally connecting layer n+1 to layer n, then diagonally connecting layer n+1 to layer n, and so on. This ensures the symmetry of each branch, reduces losses, and extends service life. Furthermore, the coils in each branch of this flat-wire motor stator form a vertically interlocking wiring pattern between every two layers, resulting in fewer coil types, higher wiring efficiency, and easier achievement of symmetry requirements for an odd number of winding layers.

[0129] In this embodiment, the coil includes a coil body 11 and a bending portion 12. The coil body 11 includes two parallel through-slot portions 111 and a connecting portion 112 connected to one end of the two through-slot portions 111. The bending portion 12 is located at the other end of the two through-slot portions 111 and forms a welding end. If m is an even number, the two through-slot portions 111 of each coil are located in two adjacent layers respectively; if m is an odd number, the two through-slot portions 111 of the coil located on the innermost side of the outermost layer are located in two adjacent layers respectively, and the two through-slot portions 111 of the coil located on the outermost layer are located in the same layer; or the two through-slot portions of the coil located on the outermost side of the innermost layer are located in two adjacent layers respectively, and the two through-slot portions of the coil located on the innermost layer are located in the same layer. The connecting portion 112 is V-shaped or arc-shaped, making the coil body 11 U-shaped or V-shaped. Since all coils use the same type (U-shaped or V-shaped), heterogeneous coils and bridging coils are eliminated, reducing the variety of coil types, thereby facilitating assembly and mass production, and improving production efficiency.

[0130] In this embodiment, m is an odd number. The two through-slot portions 111 of the coil located on the innermost side of the outermost layer are located in two adjacent layers, and the two through-slot portions 111 of the coil located on the outermost layer are located in the same layer. Alternatively, the two through-slot portions of the coil located on the outermost side of the innermost layer are located in two adjacent layers, and the two through-slot portions of the coil located on the innermost layer are located in the same layer. In the two iron core slots 3 where each coil is located, one iron core slot 3 has one branch, and the other iron core slot 3 has two different branches. The coils of the two different branches are alternately arranged in the iron core slots 3. In this way, the number of coils in each branch in each iron core slot 3 is basically the same, which improves the symmetry.

[0131] In this embodiment, the three parallel branches of each winding line are respectively designated as the first branch A, the second branch B, and the third branch C. The first branch A includes coils A1-a2, A3-a4, A5-a6, A7-a8, A9-a10, A11-a12, A13-a14, A15-a16, and A17-a18. The second branch B includes coils B1-b2, B3-b4, B5-b6, B7-b8, B9-b10, B11-b12, B13-b14, B15-b16, and B17-b18. The third branch C includes coils C1-c2, C3-c4, C5-c6, C7-c8, C9-c10, C11-c12, C13-c14, C15-c16, and C17-c18.

[0132] The two slot-passing portions 111 of coils A1-a2, A3-a4, and A5-a6 are located in the 1st and 2nd layers along the slot opening direction of the inner core slot 3, respectively. The two slot-passing portions 111 of coils A7-a8, A9-a10, and A11-a12 are located in the 3rd and 4th layers along the slot opening direction of the inner core slot 3, respectively. The two slot-passing portions 111 of coils A13-a14, A15-a16, and A17-a18 are located in the 5th and 6th layers along the slot opening direction of the inner core slot 3, respectively, and so on, until coil A[(6m-6) / 2 -5]-a[(6m-6) / 2-4], A[(6m-6) / 2-3]-a[(6m-6) / 2-2], A[(6m-6) / 2-1]-a[(6m-6) / 2] The two slot-passing parts 111 of A[(6m-6) / 2 are located in the (m-2)th and (m-1)th layers of the core slot 3 along the slot opening direction at the bottom of the slot, respectively; the coils A[(6m-6) / 2+1]-a[(6m-6) / 2+2], A[(6m-6) / 2+3]-a[(6m-6) / 2+4], A[(6m-6) / 2+5]-a[(6m-6] The two slot-passing portions 111 of coil A[(6m-6) / 2+6] are both located in the m-th layer along the slot opening direction of the inner core slot 3; the two slot-passing portions 111 of coil A[(6m-6) / 2+7]-a[(6m-6) / 2+8], A[(6m-6) / 2+9]-a[(6m-6) / 2+10], and A[(6m-6) / 2+11]-a[(6m-6) / 2+12] are respectively located in the m-1 and m-2 layers along the slot opening direction of the inner core slot 3; the two slot-passing portions 111 of coil A[(6m-6) / 2+13]-a[(6m-6) / 2+ 14], A[(6m-6) / 2+15]-a[(6m-6) / 2+16], A[(6m-6) / 2+17]-a[(6m-6) / 2+18] are respectively located in the (m-3)th and (m-2)th layers along the slot opening direction of the bottom of the iron core slot 3, and so on, until the two slot-passing parts 111 of coils A(6m-5)-a(6m-4), A(6m-3)-a(6m-2), A(6m-1)-a(6m) are respectively located in the 2nd and 1st layers along the slot opening direction of the bottom of the iron core slot 3;

[0133] A1-a2 are connected to A3-a4 at the welding end; A3-a4 coil is connected to A5-a6 at the welding end; A5-a6 is connected to A7-a8 at the welding end; A7-a8 is connected to A9-a10 at the welding end; A9-a10 is connected to A11-a12 at the welding end; A11-a12 is connected to A13-a14 at the welding end; A13-a14 is connected to A15-a16 at the welding end; A15-a16 is connected to A17-a18 at the welding end; and so on.

[0134] The two slot-passing portions 111 of coils B1-b2, B3-b4, and B5-b6 are located in the first and second layers along the slot opening direction of the inner core slot 3, respectively. The two slot-passing portions 111 of coils B7-b8, B9-b10, and B11-b12 are located in the third and fourth layers along the slot opening direction of the inner core slot 3, respectively. The two slot-passing portions 111 of coils B13-b14, B15-b16, and B17-b18 are located in the fifth and sixth layers along the slot opening direction of the inner core slot 3, respectively, and so on, until coil B[(6m-6) / 2 -5]-b[(6m-6) / 2-4], B[(6m-6) / 2-3]-b[(6m-6) / 2-2], B[(6m-6) / 2-1]-b[(6m-6) / 2] The two slot-passing parts 111 of B[(6m-6) / 2-4], B[(6m-6) / 2-3]-b[(6m-6) / 2-2], B[(6m-6) / 2+1]-b[(6m-6) / 2+2], B[(6m-6) / 2+3]-b[(6m-6) / 2+4], B[(6m-6) / 2+5]-b[(6m-6] The two slot-passing portions 111 of coil B[(6m-6) / 2+6] are both located in the m-th layer along the slot opening direction of the inner core slot 3; the two slot-passing portions 111 of coil B[(6m-6) / 2+7]-b[(6m-6) / 2+8], B[(6m-6) / 2+9]-b[(6m-6) / 2+10], and B[(6m-6) / 2+11]-b[(6m-6) / 2+12] are respectively located in the m-1-th and m-2-th layers along the slot opening direction of the inner core slot 3; the two slot-passing portions 111 of coil B[(6m-6) / 2+13]-b[(6m-6) / 2+ 14], B[(6m-6) / 2+15]-b[(6m-6) / 2+16], B[(6m-6) / 2+17]-b[(6m-6) / 2+18] are respectively located in the (m-3)th and (m-2)th layers along the slot opening direction of the bottom of the iron core slot 3, and so on, until the two slot-passing parts 111 of coils B(6m-5)-b(6m-4), B(6m-3)-b(6m-2), B(6m-1)-b(6m) are respectively located in the 2nd and 1st layers along the slot opening direction of the bottom of the iron core slot 3;

[0135] B1-b2 is connected to B3-b4 at the welding end; the B3-b4 coil is connected to B5-b6 at the welding end; B5-b6 is connected to B7-b8 at the welding end; B7-b8 is connected to B9-b10 at the welding end; B9-b10 is connected to B11-b12 at the welding end; B11-b12 is connected to B13-b14 at the welding end; B13-b14 is connected to B15-b16 at the welding end; B15-b16 is connected to B17-b18 at the welding end; and so on.

[0136] The two slot-passing portions 111 of coils C1-c2, C3-c4, and C5-c6 are located in the 1st and 2nd layers along the slot opening direction of the inner core slot 3, respectively. The two slot-passing portions 111 of coils C7-c8, C9-c10, and C11-c12 are located in the 3rd and 4th layers along the slot opening direction of the inner core slot 3, respectively. The two slot-passing portions 111 of coils C13-c14, C15-c16, and C17-c18 are located in the 5th and 6th layers along the slot opening direction of the inner core slot 3, respectively, and so on, until coil C[(6m-6) / 2 -5]-c[(6m-6) / 2-4], C[(6m-6) / 2-3]-c[(6m-6) / 2-2], C[(6m-6) / 2-1]-c[(6m-6) / 2] The two slot-passing parts 111 of C[(6m-6) / 2-4], C[(6m-6) / 2-3]-c[(6m-6) / 2-2], C[(6m-6) / 2+1]-c[(6m-6) / 2+2], C[(6m-6) / 2+3]-c[(6m-6) / 2+4], C[(6m-6) / 2+5]-c[(6m-6] The two slot-passing portions 111 of coil C[(6m-6) / 2+6] are both located in the m-th layer along the slot opening direction of the inner core slot 3; the two slot-passing portions 111 of coil C[(6m-6) / 2+7]-c[(6m-6) / 2+8], C[(6m-6) / 2+9]-c[(6m-6) / 2+10], and C[(6m-6) / 2+11]-c[(6m-6) / 2+12] are respectively located in the m-1-th and m-2-th layers along the slot opening direction of the inner core slot 3; the two slot-passing portions 111 of coil C[(6m-6) / 2+13]-c[(6m-6) / 2+ 14], C[(6m-6) / 2+15]-c[(6m-6) / 2+16], C[(6m-6) / 2+17]-c[(6m-6) / 2+18] are respectively located in the (m-3)th and (m-2)th layers along the slot opening direction of the bottom of the iron core slot 3, and so on, until the two slot-passing parts 111 of coils C(6m-5)-c(6m-4), C(6m-3)-c(6m-2), C(6m-1)-c(6m) are respectively located in the 2nd and 1st layers along the slot opening direction of the bottom of the iron core slot 3;

[0137] C1-C2 are connected to C3-C4 at the welding end; C3-C4 coils are connected to C5-C6 at the welding end; C5-C6 are connected to C7-C8 at the welding end; C7-C8 are connected to C9-C10 at the welding end; C9-C10 are connected to C11-C12 at the welding end; C11-C12 are connected to C13-C14 at the welding end; C13-C14 are connected to C15-C16 at the welding end; C15-C16 are connected to C17-C18 at the welding end; and so on.

[0138] The coil connection sequence proceeds from layer 1 to layer m, then back from layer m to layer 1, and so on.

[0139] In this embodiment, the coil pitch of the third branch C is y-3, y, y in sequence, and the coils from layer n+1 to layer n have the coil pitches of the first branch A as y-3, y, y in sequence. The coil pitches of the second branch B and the third branch C are y, y, y-3 in sequence, where y is a positive integer.

[0140] Specifically, taking a 9-layer flat wire motor with 54 slots, 6 poles, and 3 branches as an example, the number of coil layers increases sequentially from 1 to 9 (m=9) from the slot opening to the slot bottom, and vice versa. Select one phase of the three-phase winding; the specific winding arrangement is as follows... Figure 21 and 22 As shown. The branches are represented by A, B, and C respectively. A1-a2, A3-a4, and A5-a6 form one loop, and so on. A1-a2, B1-b2, and C1-c2 form a group of coils, as shown. Figure 19 As shown. From Figure 19 As can be seen, coils A1-a2 and B1-b2 have a pitch of 10, and coil C1-c2 has a pitch of 7, forming a group of coils; other coil groups have the same span and combination as this group of coils, and are connected by welding at the other end of the winding, and so on.

[0141] Taking the first branch A as an example, the upper and lower edges of coils A1-a2, A3-a4, and A5-a6 (the two through-slots 111 of the coil are denoted as the upper and lower edges, respectively) are located in layers 1 and 2, respectively; the upper and lower edges of coils A7-a8, A9-a10, and A11-a12 are located in layers 3 and 4, respectively; the upper and lower edges of coils A13-a14, A15-a16, and A17-a18 are located in layers 5 and 6, respectively; and the upper and lower edges of coils A19-a20, A21-a22, and A23-a24 are located in layers 7 and 8, respectively. Then, by changing the twisting direction of coil A25-a26, a bridging is achieved. The coil connection sequence is from layer 1 to layer 9, as follows: Figure 21 As shown; A27-a28 and A29-a30 are coils in the same layer of the 9th layer, as... Figure 20 As shown, the coil connection sequence starts from the 9th layer and then connects to the 1st layer sequentially. Other branches are similar to branch A.

[0142] For coil groups with the same twisting direction at the jumper soldering end on the 9th layer, such as Figure 20 The remaining coils in the 9th layer are all across the same layer with the soldered ends twisted in opposite directions towards both ends. The coil diagram for the 9th layer is shown below. Figure 18 As shown; taking all other winding weld ends with reverse twisting towards both ends and spanning two adjacent layers as an example. Its wiring diagram is as follows. Figure 23 As shown.

[0143] The flexible adjustment of the twist position of the lead wires of the three-phase windings is within the scope of protection of this patent; different combinations of star and delta connections of the three-phase windings, as well as the center point connection method, are all within the scope of protection of this patent; changes in the wire type of the three-phase lead wire ends are also within the scope of protection of this patent; this patent cites winding connection methods with slot opening to slot bottom as an example of 1-9, and vice versa. Connection methods from slot bottom to slot opening 1-9 are also within the scope of protection of this patent.

[0144] Example 4: The flat wire motor of this example includes the flat wire motor stator of Example 1, Example 2, or Example 3. The flat wire motor of the present invention also includes the flat wire motor stator as described above, and also has the advantages described above for the flat wire motor stator, and has a simple overall structure, small size, and high working stability.

[0145] Example 5: The vehicle of this example includes the flat wire motor of Example 4. The vehicle of the present invention also includes the flat wire motor stator as described above, and also has the advantages described above for the flat wire motor stator.

[0146] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the scope of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the present invention, should fall within the protection scope of the present invention.

Claims

1. A flat wire motor stator, comprising a stator winding (1) and a stator core (2), wherein the stator core (2) is provided with a plurality of core slots (3) in the circumferential direction, and the stator winding (1) comprises a multi-phase winding, characterized in that: Each phase winding includes one or more sets of parallel winding lines. Each set of winding lines includes three or six parallel branches. Each branch includes coils arranged sequentially and connected in series on the circumferential core slots of the stator core (2). In each core slot (3), each coil is stacked in m layers in the depth direction of the core slot (3). The coil connection sequence of each branch is from the innermost layer to the outermost layer and then from the outermost layer to the innermost layer, from layer n to layer n+1, from layer n diagonally connected to layer n+1 and then from layer n+1 diagonally connected to layer n. The coil from layer n+1 to layer n is connected diagonally from layer n+1 to layer n and then from layer n diagonally connected to layer n+1. Where n is an odd number. The m is a positive integer; the coil includes a coil body (11) and a bent portion (12). The coil body (11) includes two parallel slotted portions (111) and a connecting portion (112) connected to one end of the two slotted portions (111). The bent portion (12) is located at the other end of the two slotted portions (111) and forms a welding end. If m is an even number, the two slotted portions (111) of each coil are located in two adjacent layers respectively; two different branches are passed through each core slot (3), and the coils of the two branches are alternately arranged in the core slot (3); the six parallel branches of each winding line are respectively set as the first branch A, the second branch B, the third branch C, the fourth branch B, the fifth branch C, the sixth branch B, the sixth branch C ... The network consists of four branches (D), a fifth branch (E), and a sixth branch (F). The first branch (A) includes coils A1-a2, A3-a4, A5-a6, A7-a8, A9-a10, A11-a12, A13-a14, A15-a16, and A17-a18. The second branch (B) includes coils B1-b2, B3-b4, B5-b6, B7-b8, B9-b10, B11-b12, B13-b14, B15-b16, and B17-b18. The third branch (C) includes coils C1-c2, C3-c4, C5-c6, C7-c8, C9-c10, C11-c12, C13-c14, and C15-c16. The fourth branch D includes coils D1-d2, D3-d4, D5-d6, D7-d8, D9-d10, D11-d12, D13-d14, D15-d16, and D17-d18; the fifth branch E includes coils E1-e2, E3-e4, E5-e6, E7-e8, E9-e10, E11-e12, E13-e14, E15-e16, and E17-e18; and the sixth branch F includes coils F1-f2, F3-f4, F5-f6, F7-f8, F9-f10, F11-f12, F13-f14, F15-f16, and F17-f18. The two through-slot portions (111) of coils A1-a2, A3-a4, and A5-a6 are located in the first and second layers along the slot opening direction of the inner core slot (3), respectively. The two through-slot portions (111) of coils A7-a8, A9-a10, and A11-a12 are located in the third and fourth layers along the slot opening direction of the inner core slot (3), respectively. The two through-slot portions (111) of coils A13-a14, A15-a16, and A17-a18 are located in the fifth and sixth layers along the slot opening direction of the inner core slot (3), respectively. And so on, until the two through-slot portions (111) of the first branch A coil are located in the (m-1)th and (m)th layers along the slot opening direction of the inner core slot (3), respectively. A1-a2 are connected to A3-a4 at the welding end; A3-a4 coil is connected to A5-a6 at the welding end; A5-a6 is connected to A7-a8 at the welding end; A7-a8 is connected to A9-a10 at the welding end; A9-a10 is connected to A11-a12 at the welding end; A11-a12 is connected to A13-a14 at the welding end; A13-a14 is connected to A15-a16 at the welding end; A15-a16 is connected to A17-a18 at the welding end; and so on. The two through-slot portions (111) of coils B1-b2, B3-b4, and B5-b6 are located in the first and second layers along the slot opening direction of the inner core slot (3), respectively. The two through-slot portions (111) of coils B7-b8, B9-b10, and B11-b12 are located in the third and fourth layers along the slot opening direction of the inner core slot (3), respectively. The two through-slot portions (111) of coils B13-b14, B15-b16, and B17-b18 are located in the fifth and sixth layers along the slot opening direction of the inner core slot (3), respectively. And so on, until the two through-slot portions (111) of the second branch B coil are located in the (m-1)th and (m)th layers along the slot opening direction of the inner core slot (3), respectively. B1-b2 is connected to B3-b4 at the welding end; the B3-b4 coil is connected to B5-b6 at the welding end; B5-b6 is connected to B7-b8 at the welding end; B7-b8 is connected to B9-b10 at the welding end; B9-b10 is connected to B11-b12 at the welding end; B11-b12 is connected to B13-b14 at the welding end; B13-b14 is connected to B15-b16 at the welding end; B15-b16 is connected to B17-b18 at the welding end; and so on. The two slot-penetrating parts (111) of coils C1-c2, C3-c4, and C5-c6 are located in the first and second layers along the slot opening direction of the inner core slot (3), respectively. The two slot-penetrating parts (111) of coils C7-c8, C9-c10, and C11-c12 are located in the third and fourth layers along the slot opening direction of the inner core slot (3), respectively. The two slot-penetrating parts (111) of coils C13-c14, C15-c16, and C17-c18 are located in the fifth and sixth layers along the slot opening direction of the inner core slot (3), respectively. And so on, until the two slot-penetrating parts (111) of the third branch C coil are located in the m-1 and m layers along the slot opening direction of the inner core slot (3), respectively. C1-C2 are connected to C3-C4 at the welding end; C3-C4 coils are connected to C5-C6 at the welding end; C5-C6 are connected to C7-C8 at the welding end; C7-C8 are connected to C9-C10 at the welding end; C9-C10 are connected to C11-C12 at the welding end; C11-C12 are connected to C13-C14 at the welding end; C13-C14 are connected to C15-C16 at the welding end; C15-C16 are connected to C17-C18 at the welding end; and so on. The two through-slot portions (111) of coils D1-d2, D3-d4, and D5-d6 are located in the m-th and m-1-th layers of the inner core slot (3) along the slot opening direction, respectively. The two through-slot portions (111) of coils D7-d8, D9-d10, and D11-d12 are located in the m-2-th and m-3-th layers of the inner core slot (3) along the slot opening direction, respectively. The two through-slot portions (111) of coils D13-d14, D15-d16, and D17-d18 are located in the m-4-th and m-5-th layers of the inner core slot (3) along the slot opening direction, respectively. And so on, until the two through-slot portions (111) of the fourth branch D coil are located in the 2nd and 1st layers of the inner core slot (3) along the slot opening direction, respectively. D1-d2 are connected to D3-d4 at the welding end; D3-d4 coil is connected to D5-d6 at the welding end; D5-d6 is connected to D7-d8 at the welding end; D7-d8 is connected to D9-d10 at the welding end; D9-d10 is connected to D11-d12 at the welding end; D11-d12 is connected to D13-d14 at the welding end; D13-d14 is connected to D15-d16 at the welding end; D15-d16 is connected to D17-d18 at the welding end; and so on. The two through-slot portions (111) of coils E1-e2, E3-e4, and E5-e6 are located in the m-th and m-1-th layers of the inner core slot (3) along the slot opening direction, respectively. The two through-slot portions (111) of coils E7-e8, E9-e10, and E11-e12 are located in the m-2-th and m-3-th layers of the inner core slot (3) along the slot opening direction, respectively. The two through-slot portions (111) of coils E13-e14, E15-e16, and E17-e18 are located in the m-4-th and m-5-th layers of the inner core slot (3) along the slot opening direction, respectively. And so on, until the two through-slot portions (111) of the fifth branch E coil are located in the 2nd and 1st layers of the inner core slot (3) along the slot opening direction, respectively. E1-e2 are connected to E3-e4 at the soldering end; E3-e4 coils are connected to E5-e6 at the soldering end; E5-e6 are connected to E7-e8 at the soldering end; E7-e8 are connected to E9-e10 at the soldering end; E9-e10 are connected to E11-e12 at the soldering end; E11-e12 are connected to E13-e14 at the soldering end; E13-e14 are connected to E15-e16 at the soldering end; E15-e16 are connected to E17-e18 at the soldering end, and so on. The two slot-penetrating parts (111) of coils F1-f2, F3-f4, and F5-f6 are located in the m-th and m-1-th layers of the inner core slot (3) along the slot opening direction, respectively. The two slot-penetrating parts (111) of coils F7-f8, F9-f10, and F11-f12 are located in the m-2-th and m-3-th layers of the inner core slot (3) along the slot opening direction, respectively. The two slot-penetrating parts (111) of coils F13-f14, F15-f16, and F17-f18 are located in the m-4-th and m-5-th layers of the inner core slot (3) along the slot opening direction, respectively. And so on, until the two slot-penetrating parts (111) of the sixth branch F coil are located in the 2nd and 1st layers of the inner core slot (3) along the slot opening direction, respectively. F1-f2 are connected to F3-f4 at the soldering end; F3-f4 coil is connected to F5-f6 at the soldering end; F5-f6 is connected to F7-f8 at the soldering end; F7-f8 is connected to F9-f10 at the soldering end; F9-f10 is connected to F11-f12 at the soldering end; F11-f12 is connected to F13-f14 at the soldering end; F13-f14 is connected to F15-f16 at the soldering end; F15-f16 is connected to F17-f18 at the soldering end; and so on. The coil connection sequence proceeds from layer 1 to layer m, then back from layer m to layer 1, and so on in a cyclical manner. The coil pitches of the first branch A and the second branch B are y, y, y-3 respectively; the coil pitches of the third branch C are y-3, y, y respectively; the coil pitches of the fourth branch D are y-3, y, y respectively; and the coil pitches of the fifth branch E and the sixth branch F are y, y, y-3 respectively, where y is a positive integer. If m is an odd number, the two slots (111) of the coil located on the inner side of the outermost layer are located in two adjacent layers respectively, and the two slots (111) of the coil located on the outermost layer are located in the same layer, or the two slots of the coil located on the outer side of the innermost layer are located in two adjacent layers respectively, and the two slots of the coil located on the innermost layer are located in the same layer.

2. A flat wire motor stator, comprising a stator winding (1) and a stator core (2), wherein the stator core (2) is provided with a plurality of core slots (3) in the circumferential direction, and the stator winding (1) comprises a multi-phase winding, characterized in that: Each phase winding includes one or more sets of parallel winding lines. Each set of winding lines includes three or six parallel branches. Each branch includes coils arranged sequentially and connected in series on the circumferential core slots of the stator core (2). In each core slot (3), each coil is stacked in m layers in the depth direction of the core slot (3). The coil connection sequence of each branch is from the innermost layer to the outermost layer of the core slot (3) and then from the outermost layer to the innermost layer, from layer n to layer n+1, from layer n diagonally connected to layer n+1 and then from layer n+1 diagonally connected to layer n+1. The coils in layer n+1 to layer n are diagonally connected from layer n+1 to layer n and then diagonally connected from layer n to layer n+1, where n is an odd number and m is a positive integer; the coil includes a coil body (11) and a bent portion (12). The coil body (11) includes two parallel slotted portions (111) and a connecting portion (112) connected to one end of the two slotted portions (111). The bent portion (12) is located at the other end of the two slotted portions (111) and forms a welding end. If m is an even number, the coils of each layer n... Two through-slot sections (111) are located in two adjacent layers respectively; in the two iron core slots (3) where each coil is located, one iron core slot (3) has one branch, and the other iron core slot (3) has two different branches, and the coils of the two different branches are alternately arranged in the iron core slot (3); m is an even number, and the three parallel branches of each winding line are respectively set as the first branch A, the second branch B and the third branch C, and the first branch A includes coils A1-a2, A3-a4, A5-a6, A7-a8 and A9-a10. The second branch B includes coils B1-b2, B3-b4, B5-b6, B7-b8, B9-b10, B11-b12, B13-b14, B15-b16, and B17-b18; the third branch C includes coils C1-c2, C3-c4, C5-c6, C7-c8, C9-c10, C11-c12, C13-c14, C15-c16, and C17-c18. The two through-slot portions (111) of coils A1-a2, A3-a4, and A5-a6 are located in the first and second layers along the slot opening direction of the inner core slot (3), respectively. The two through-slot portions (111) of coils A7-a8, A9-a10, and A11-a12 are located in the third and fourth layers along the slot opening direction of the inner core slot (3), respectively. The two through-slot portions (111) of coils A13-a14, A15-a16, and A17-a18 are located in the second and third layers along the slot opening direction of the inner core slot (3), respectively. The slots (111) are located at the 5th and 6th layers along the slot opening direction of the bottom of the iron core slot (3), respectively, and so on, until the two slot-passing parts (111) of coil A (6m / 2-5)-a (6m / 2-4), A (6m / 2-3)-a (6m / 2-2), and A (6m / 2-1)-a (6m / 2) are located at the (m-1)th and (m)th layers along the slot opening direction of the bottom of the iron core slot (3), respectively; coil A (6m The two slot-passing parts (111) of A(6m / 2+2), A(6m / 2+3)-a(6m / 2+4), and A(6m / 2+5)-a(6m / 2+6) are located in the m-th and m-1-th layers of the core slot (3) along the slot opening direction. The coils A(6m / 2+7)-a(6m / 2+8), A(6m / 2+9)-a(6m / 2+10), and A(6m / 2+11) are respectively located in the m-th and m-1-th layers of the core slot (3) along the slot opening direction. The two slot-passing parts (111) of coil A(6m-5)-a(6m-4), A(6m-3)-a(6m-2), and A(6m-1)-a(6m) are respectively located in the m-2 and m-3 layers along the slot opening direction of the bottom of the iron core slot (3), and so on, until the two slot-passing parts (111) of coil A(6m-5)-a(6m-4), A(6m-3)-a(6m-2), and A(6m-1)-a(6m) are respectively located in the 2nd and 1st layers along the slot opening direction of the bottom of the iron core slot (3); A1-a2 are connected to A3-a4 at the welding end; A3-a4 coil is connected to A5-a6 at the welding end; A5-a6 is connected to A7-a8 at the welding end; A7-a8 is connected to A9-a10 at the welding end; A9-a10 is connected to A11-a12 at the welding end; A11-a12 is connected to A13-a14 at the welding end; A13-a14 is connected to A15-a16 at the welding end; A15-a16 is connected to A17-a18 at the welding end; and so on. The two through-slot portions (111) of coils B1-b2, B3-b4, and B5-b6 are located in the first and second layers along the slot opening direction of the inner core slot (3), respectively. The two through-slot portions (111) of coils B7-b8, B9-b10, and B11-b12 are located in the third and fourth layers along the slot opening direction of the inner core slot (3), respectively. The two through-slot portions (111) of coils B13-b14, B15-b16, and B17-b18 are located in the second and third layers along the slot opening direction of the inner core slot (3), respectively. The slots (111) are located at the 5th and 6th layers along the slot opening direction of the bottom of the iron core slot (3), respectively, and so on, until the two slot-passing parts (111) of coils B(6m / 2-5)-b(6m / 2-4), B(6m / 2-3)-b(6m / 2-2), and B(6m / 2-1)-b(6m / 2) are located at the (m-1)th and (m)th layers along the slot opening direction of the bottom of the iron core slot (3), respectively; coils B(6m The two slot-passing parts (111) of B(6m / 2+2), B(6m / 2+3)-b(6m / 2+4), and B(6m / 2+5)-b(6m / 2+6) are located in the m-th and m-1-th layers of the core slot (3) along the slot opening direction. The coils B(6m / 2+7)-b(6m / 2+8), B(6m / 2+9)-b(6m / 2+10), and B(6m / 2+11) are respectively located in the slot opening direction along the slot bottom. The two slot-passing parts (111) of B(6m-5)-b(6m-4), B(6m-3)-b(6m-2), and B(6m-1)-b(6m) are respectively located in the m-2 and m-3 layers along the slot opening direction of the bottom of the iron core slot (3), and so on, until the two slot-passing parts (111) of coils B(6m-5)-b(6m-4), B(6m-3)-b(6m-2), and B(6m-1)-b(6m) are respectively located in the 2nd and 1st layers along the slot opening direction of the bottom of the iron core slot (3); B1-b2 is connected to B3-b4 at the welding end; the B3-b4 coil is connected to B5-b6 at the welding end; B5-b6 is connected to B7-b8 at the welding end; B7-b8 is connected to B9-b10 at the welding end; B9-b10 is connected to B11-b12 at the welding end; B11-b12 is connected to B13-b14 at the welding end; B13-b14 is connected to B15-b16 at the welding end; B15-b16 is connected to B17-b18 at the welding end; and so on. The two through-slot portions (111) of coils C1-c2, C3-c4, and C5-c6 are located in the first and second layers along the slot opening direction of the inner core slot (3), respectively. The two through-slot portions (111) of coils C7-c8, C9-c10, and C11-c12 are located in the third and fourth layers along the slot opening direction of the inner core slot (3), respectively. The two through-slot portions (111) of coils C13-c14, C15-c16, and C17-c18 are located in the second and third layers along the slot opening direction of the inner core slot (3), respectively. The slots (111) are located at the 5th and 6th layers along the slot opening direction of the bottom of the iron core slot (3), respectively, and so on, until the two slot-penetrating parts (111) of coil C(6m / 2-5)-c(6m / 2-4), C(6m / 2-3)-c(6m / 2-2), and C(6m / 2-1)-c(6m / 2) are located at the (m-1)th and (m)th layers along the slot opening direction of the bottom of the iron core slot (3), respectively; coil C(6m The two slot-passing parts (111) of C(6m / 2+2), C(6m / 2+3)-c(6m / 2+4), and C(6m / 2+5)-c(6m / 2+6) are located in the m-th and m-1-th layers of the core slot (3) along the slot opening direction. The coils C(6m / 2+7)-c(6m / 2+8), C(6m / 2+9)-c(6m / 2+10), and C(6m / 2+11) are respectively located in the m-th and m-1-th layers of the core slot (3) along the slot opening direction. The two slot-passing parts (111) of C(6m-5)-c(6m-4), C(6m-3)-c(6m-2), and C(6m-1)-c(6m) are respectively located in the m-2 and m-3 layers along the slot opening direction of the bottom of the iron core slot (3), and so on, until the two slot-passing parts (111) of coils C(6m-5)-c(6m-4), C(6m-3)-c(6m-2), and C(6m-1)-c(6m) are respectively located in the 2nd and 1st layers along the slot opening direction of the bottom of the iron core slot (3); C1-C2 are connected to C3-C4 at the welding end; C3-C4 coils are connected to C5-C6 at the welding end; C5-C6 are connected to C7-C8 at the welding end; C7-C8 are connected to C9-C10 at the welding end; C9-C10 are connected to C11-C12 at the welding end; C11-C12 are connected to C13-C14 at the welding end; C13-C14 are connected to C15-C16 at the welding end; C15-C16 are connected to C17-C18 at the welding end; and so on. The coil connection sequence proceeds from layer 1 to layer m, then back from layer m to layer 1, and so on in a cyclical manner. The coil pitches of the first branch A and the second branch B in layers n to n+1 are y, y, y-3 respectively, and the coil pitches of the third branch C are y-3, y, y respectively. The coil pitches of the first branch A in layers n+1 to n are y-3, y, y respectively, and the coil pitches of the second branch B and the third branch C are y, y, y-3 respectively, where y is a positive integer.

3. A flat wire motor stator, comprising a stator winding (1) and a stator core (2), wherein the stator core (2) is provided with a plurality of core slots (3) in the circumferential direction, and the stator winding (1) comprises a multi-phase winding, characterized in that: Each phase winding includes one or more sets of parallel winding lines. Each set of winding lines includes three or six parallel branches. Each branch includes coils arranged sequentially and connected in series on the circumferential core slots of the stator core (2). In each core slot (3), each coil is stacked in m layers in the depth direction of the core slot (3). The coil connection sequence of each branch is from the innermost layer to the outermost layer of the core slot (3) and then from the outermost layer to the innermost layer, from layer n to layer n+1, from layer n diagonally connected to layer n+1 and then from layer n+1 diagonally connected to layer n+1. The coils in layer n+1 to layer n are diagonally connected from layer n+1 to layer n and then diagonally connected from layer n to layer n+1, where n is an odd number and m is a positive integer; the coil includes a coil body (11) and a bent portion (12). The coil body (11) includes two parallel slotted portions (111) and a connecting portion (112) connected to one end of the two slotted portions (111). The bent portion (12) is located at the other end of the two slotted portions (111) and forms a welding end. If m is an even number, the coils of each layer n... Two through-slots (111) are located in two adjacent layers respectively; in the two iron core slots (3) where each coil is located, one branch is passed through one iron core slot (3), and two different branches are passed through the other iron core slot (3), and the coils of the two different branches are alternately arranged in the iron core slot (3); m is an odd number, and the three parallel branches of each winding line are respectively set as the first branch A, the second branch B and the third branch C, the first branch A includes coils A1-a2, A3-a4, A5-a6, A7-a8, A9-a10 The second branch B includes coils B1-b2, B3-b4, B5-b6, B7-b8, B9-b10, B11-b12, B13-b14, B15-b16, and B17-b18; the third branch C includes coils C1-c2, C3-c4, C5-c6, C7-c8, C9-c10, C11-c12, C13-c14, C15-c16, and C17-c18. The two through-slot portions (111) of coils A1-a2, A3-a4, and A5-a6 are located in the first and second layers along the slot opening direction of the inner core slot (3), respectively. The two through-slot portions (111) of coils A7-a8, A9-a10, and A11-a12 are located in the third and fourth layers along the slot opening direction of the inner core slot (3), respectively. The two through-slot portions (111) of coils A13-a14, A15-a16, and A17-a18 are located in the fifth and sixth layers along the slot opening direction of the inner core slot (3), respectively, and so on, until coil A[(6m- 6) / 2-5]-a[(6m-6) / 2-4]、A[(6m-6) / 2-3]-a[(6m-6) / 2-2]、A[(6m-6) / 2-1]-a[(6m-6) / 2] The two slot-passing parts (111) of the coils are located in the m-2 and m-1 layers of the iron core slot (3) along the slot opening direction; coils A[(6m-6) / 2+1]-a[(6m-6) / 2+2]、A[(6m-6) / 2+3]-a[(6m-6) / 2+4]、A[(6m-6) / 2+5]-a[(6m-6) The two slot-passing parts (111) of coil A[(6m-6) / 2+7]-a[(6m-6) / 2+8], A[(6m-6) / 2+9]-a[(6m-6) / 2+10], and A[(6m-6) / 2+11]-a[(6m-6) / 2+12] are respectively located in the m-1 and m-2 layers of the inner core slot (3) along the slot opening direction. 14], A[(6m-6) / 2+15]-a[(6m-6) / 2+16], A[(6m-6) / 2+17]-a[(6m-6) / 2+18] The two slot-passing parts (111) of A[(6m-6) / 2+15]-a[(6m-6) / 2+16] and A[(6m-6) / 2+17]-a[(6m-6) / 2+18] are respectively located in the m-3 and m-2 layers along the slot opening direction of the bottom of the iron core slot (3), and so on, until the two slot-passing parts (111) of coil A(6m-5)-a(6m-4), A(6m-3)-a(6m-2), A(6m-1)-a(6m) are respectively located in the 2nd and 1st layers along the slot opening direction of the bottom of the iron core slot (3); A1-a2 are connected to A3-a4 at the welding end; A3-a4 coil is connected to A5-a6 at the welding end; A5-a6 is connected to A7-a8 at the welding end; A7-a8 is connected to A9-a10 at the welding end; A9-a10 is connected to A11-a12 at the welding end; A11-a12 is connected to A13-a14 at the welding end; A13-a14 is connected to A15-a16 at the welding end; A15-a16 is connected to A17-a18 at the welding end; and so on. The two through-slot portions (111) of coils B1-b2, B3-b4, and B5-b6 are located in the first and second layers along the slot opening direction of the inner core slot (3), respectively. The two through-slot portions (111) of coils B7-b8, B9-b10, and B11-b12 are located in the third and fourth layers along the slot opening direction of the inner core slot (3), respectively. The two through-slot portions (111) of coils B13-b14, B15-b16, and B17-b18 are located in the fifth and sixth layers along the slot opening direction of the inner core slot (3), respectively, and so on, until coil B[(6m- 6) / 2-5]-b[(6m-6) / 2-4]、B[(6m-6) / 2-3]-b[(6m-6) / 2-2]、B[(6m-6) / 2-1]-b[(6m-6) / 2] The two slot-passing parts (111) of the coils are located in the m-2 and m-1 layers of the iron core slot (3) along the slot opening direction; The two slot-passing parts (111) of coil B[(6m-6) / 2+7]-b[(6m-6) / 2+8], B[(6m-6) / 2+9]-b[(6m-6) / 2+10], and B[(6m-6) / 2+11]-b[(6m-6) / 2+12] are respectively located in the m-1 and m-2 layers of the bottom of the iron core slot (3) along the slot opening direction. 14], B[(6m-6) / 2+15]-b[(6m-6) / 2+16], B[(6m-6) / 2+17]-b[(6m-6) / 2+18] are respectively located in the m-3 and m-4 layers along the slot opening direction of the bottom of the iron core slot (3), and so on, until the two slot-through parts (111) of coils B(6m-5)-b(6m-4), B(6m-3)-b(6m-2), B(6m-1)-b(6m) are respectively located in the 2nd and 1st layers along the slot opening direction of the bottom of the iron core slot (3); B1-b2 is connected to B3-b4 at the welding end; the B3-b4 coil is connected to B5-b6 at the welding end; B5-b6 is connected to B7-b8 at the welding end; B7-b8 is connected to B9-b10 at the welding end; B9-b10 is connected to B11-b12 at the welding end; B11-b12 is connected to B13-b14 at the welding end; B13-b14 is connected to B15-b16 at the welding end; B15-b16 is connected to B17-b18 at the welding end; and so on. The two through-slot portions (111) of coils C1-c2, C3-c4, and C5-c6 are located in the first and second layers along the slot opening direction of the inner core slot (3), respectively. The two through-slot portions (111) of coils C7-c8, C9-c10, and C11-c12 are located in the third and fourth layers along the slot opening direction of the inner core slot (3), respectively. The two through-slot portions (111) of coils C13-c14, C15-c16, and C17-c18 are located in the fifth and sixth layers along the slot opening direction of the inner core slot (3), respectively, and so on, until coil C[(6m- The two slot-passing parts (111) of C[(6m-6) / 2-4], C[(6m-6) / 2-3]-c[(6m-6) / 2-2], and C[(6m-6) / 2-1]-c[(6m-6) / 2] are respectively located in the m-2 and m-1 layers along the slot opening direction of the bottom of the iron core slot (3); the coils C[(6m-6) / 2+1]-c[(6m-6) / 2+2], C[(6m-6) / 2+3]-c[(6m-6) / 2+4], and C[(6m-6) / 2+5]-c[(6m-6) The two slot-passing parts (111) of coil C[(6m-6) / 2+7]-c[(6m-6) / 2+8], C[(6m-6) / 2+9]-c[(6m-6) / 2+10], and C[(6m-6) / 2+11]-c[(6m-6) / 2+12] are respectively located in the m-1 and m-2 layers of the bottom of the iron core slot (3) along the slot opening direction. 14], C[(6m-6) / 2+15]-c[(6m-6) / 2+16], C[(6m-6) / 2+17]-c[(6m-6) / 2+18] The two slot-passing parts (111) of C[(6m-6) / 2+15]-c[(6m-6) / 2+16] and C[(6m-6) / 2+17]-c[(6m-6) / 2+18] are respectively located in the m-3 and m-4 layers along the slot opening direction of the bottom of the iron core slot (3), and so on, until the two slot-passing parts (111) of coil C(6m-5)-c(6m-4), C(6m-3)-c(6m-2), C(6m-1)-c(6m) are respectively located in the 2nd and 1st layers along the slot opening direction of the bottom of the iron core slot (3); C1-C2 are connected to C3-C4 at the welding end; C3-C4 coils are connected to C5-C6 at the welding end; C5-C6 are connected to C7-C8 at the welding end; C7-C8 are connected to C9-C10 at the welding end; C9-C10 are connected to C11-C12 at the welding end; C11-C12 are connected to C13-C14 at the welding end; C13-C14 are connected to C15-C16 at the welding end; C15-C16 are connected to C17-C18 at the welding end; and so on. The coil connection sequence proceeds from layer 1 to layer m, then back from layer m to layer 1, and so on in a cyclical manner. The coil pitches of the first branch A and the second branch B in layers n to n+1 are y, y, y-3 respectively, and the coil pitches of the third branch C are y-3, y, y respectively. The coil pitches of the first branch A in layers n+1 to n are y-3, y, y respectively, and the coil pitches of the second branch B and the third branch C are y, y, y-3 respectively, where y is a positive integer.

4. The flat wire motor stator according to claim 3, characterized in that: The value of y is 10.

5. A flat wire motor, characterized in that: The flat wire motor stator includes any one of claims 1 to 4.

6. A vehicle, characterized in that: Includes the motor described in claim 5.

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