Flat wire short-pitch winding and motor

Abstract

The utility model discloses a kind of flat wire short-pitch winding and motor, flat wire short-pitch winding includes the U-phase parallel branch circuit wound on motor stator, V-phase parallel branch circuit and W-phase parallel branch circuit;U-phase parallel branch circuit to the outgoing line end of U-phase parallel branch circuit is set in outermost flat wire layer, neutral point is set in innermost flat wire layer;U-phase parallel branch circuit to the outgoing line end of U-phase parallel branch circuit is set in innermost flat wire layer, neutral point is set in outermost flat wire layer;3Q stator slots are spaced between the neutral point of U-phase parallel branch circuit to the outgoing line end of U-phase parallel branch circuit;The number of the U-phase parallel branch circuit, V-phase parallel branch circuit and W-phase parallel branch circuit is equal and equidistantly arranged;The utility model ensures that each parallel branch circuit is evenly distributed, avoids circulation problem;By using short-pitch winding, the harmonic of motor operation is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of motor stator windings, specifically relating to a flat wire short-pitch winding and a motor. Background Technology

[0002] With the development of the new energy vehicle industry, flat wire motors have been widely used due to their excellent power performance. Currently, flat wire motors mostly adopt even-numbered flat wire schemes with 4, 6, or 8 layers. When multiple branch windings are connected in parallel, it is easy to cause an imbalance between the branches, leading to circulating current problems and seriously affecting the normal operation of the motor.

[0003] In addition, most flat wire motors currently use full-pitch windings, resulting in high harmonic content during motor operation, and unsatisfactory motor torque fluctuations, vibration noise, and high-speed eddy current losses. Utility Model Content

[0004] This invention provides a flat wire short-pitch winding and a motor, which ensures uniform distribution of each parallel branch and avoids circulating current problems; by using short-pitch windings, the harmonics of motor operation are reduced, and the problems of motor torque fluctuation, vibration noise and high-speed eddy current loss are improved.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] The first aspect of this utility model provides a flat wire short-pitch winding, including a U-phase parallel branch, a V-phase parallel branch and a W-phase parallel branch wound on the stator of a motor;

[0007] The number of stator slots per pole per phase of the motor is Q is an integer ≥ 2; 2P is the number of rotor poles of the motor, and Z is the number of stator slots of the motor; the number of U-phase parallel branches is set to 2Q, and the 2Q U-phase parallel branches are marked as follows: to ;

[0008] U-phase parallel branch To U-phase parallel branch The lead-out end is located on the outermost flat wire layer, the neutral point is located on the innermost flat wire layer, and the winding direction is set to the opposite direction.

[0009] U-phase parallel branch To U-phase parallel branch The lead-out end is located in the innermost flat wire layer, the neutral point is located in the outermost flat wire layer, and the winding direction is set to positive.

[0010] Along the positive direction of the winding, U-phase parallel branch Neutral point to U-phase parallel branch The outgoing terminals are spaced 3Q stator slots apart; among them, ;

[0011] The number of U-phase parallel branches, V-phase parallel branches, and W-phase parallel branches are equal, and the U-phase parallel branches, V-phase parallel branches, and W-phase parallel branches are arranged at equal intervals.

[0012] Furthermore, the stator slot is provided with 2n flat wire layers; the flat wire layer sequence is set from the outside to the inside along the radial direction of the motor stator, and every two adjacent flat wire layers are set as the same slot layer group; the j-th flat wire layer in the i-th stator slot is denoted as... U-phase parallel branch To U-phase parallel branch The outgoing end is set as to , where i is the stator slot number. This is the sequence number of the flattened layer.

[0013] Furthermore, the flat wire conductors of the U-phase parallel branch, V-phase parallel branch, and W-phase parallel branch include a crown end and a welded end; the crown end and the welded end are alternately arranged.

[0014] Furthermore, the flat wire conductor connection method for the U-phase parallel branch, V-phase parallel branch, and W-phase parallel branch is as follows:

[0015] The slot layer group number is set as h along the radial direction of the motor stator from the outside to the inside; the flat wire conductor number of the U-phase parallel branch, V-phase parallel branch and W-phase parallel branch is marked as t; that is: For the t-th U-phase parallel branch, For the t-th V-phase parallel branch, Let t be the t-th parallel branch of phase W, where t is an integer from 1 to 2Q;

[0016] Within the same slot layer group, the flat wire conductor bridges two adjacent flat wire layers. The span at the crown end is 3Q+1 stator slots, and the span at the welded end is 3Q-1 stator slots.

[0017] Between the h-th slot layer group and the h+1-th slot layer group, the flat wire conductor bridges two adjacent flat wire layers located in the h-th slot layer group and the h+1-th slot layer group, respectively; if t is odd and h is odd, the span at the crown end is 3Q stator slots; if t is odd and h is even, the span at the crown end is 3Q+2 stator slots; if t is even and h is odd, the span at the crown end is 3Q+2 stator slots; if t is even and h is even, the span at the crown end is 3Q stator slots.

[0018] Furthermore, the positive direction of the winding is consistent with the rotation direction of the motor.

[0019] Furthermore, the reverse direction of the winding is consistent with the direction of motor rotation.

[0020] Furthermore, the V-phase parallel branch moves 2Q stator slots relative to the U-phase parallel branch along the motor rotation direction, and the W-phase parallel branch moves 2Q stator slots relative to the V-phase parallel branch along the motor rotation direction.

[0021] Furthermore, U-phase parallel branches Neutral point to U-phase parallel branch The outgoing terminals are connected using bridging conductors to obtain Q parallel U-phase branches. ;

[0022] V-phase parallel branch Neutral point to V-phase parallel branch The outgoing terminals are connected using bridging conductors to obtain Q parallel V-phase branches. ;

[0023] W-phase parallel branch Neutral point to W-phase parallel branch The outgoing terminals are connected using bridging conductors to obtain Q parallel branches of W phases. .

[0024] Furthermore, Q parallel branches of U phase A U-phase parallel branch is obtained by bridging the conductors in series. ;

[0025] Q parallel branches with V phases A V-phase parallel branch is obtained by connecting the bridging conductors in series. ;

[0026] Q parallel branches of W phase A parallel branch of phase W is obtained by bridging the conductors in series. .

[0027] The second aspect of this utility model provides a three-phase motor, including a motor stator; the motor stator is provided with the flat wire short-pitch winding described in the first aspect.

[0028] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0029] The short-pitch winding used in this invention can effectively suppress harmonics of a specific order, reduce the harmonic content during motor operation, reduce motor torque fluctuations, improve vibration noise and eddy current loss problems, and further improve the operating efficiency and reliability of the motor.

[0030] This utility model has an equal number of U-phase parallel branches, V-phase parallel branches, and W-phase parallel branches, and these branches are equally spaced. The U-phase parallel branches... To U-phase parallel branch The outgoing terminal is located on the outermost flat wire layer, the neutral point is located on the innermost flat wire layer, and the winding direction is reversed; U-phase parallel branch To U-phase parallel branch The output terminal is located in the innermost flat wire layer, the neutral point is located in the outermost flat wire layer, and the winding direction is set to positive; thus facilitating the parallel connection of U phase branches when implementing Q parallel branches. parallel branch with U phase Series connection; U-phase parallel branch along the positive direction of the winding. Neutral point to U-phase parallel branch The stator slots are spaced 3Q apart between the output terminals. The windings of adjacent slot layers in each phase are staggered to ensure that the magnetomotive force of each parallel branch winding is consistent in magnitude and phase, effectively avoiding the generation of circulating current.

[0031] In this utility model, the number of U-phase parallel branches is set to 2Q; U-phase parallel branches Neutral point to U-phase parallel branch The outgoing terminals are connected using bridging conductors to obtain Q parallel U-phase branches. Q-phase parallel branches of U phase A U-phase parallel branch is obtained by bridging the conductors in series. Different application scenarios have different requirements for the power and speed of the motor. This utility model can change the 2Q parallel branch to a Q parallel branch, or it can change the Q parallel branch to a 1 parallel branch. By adjusting the number of parallel branches, it can flexibly match different motor design requirements, so that this utility model can be widely applied to a variety of motor scenarios on a platform.

[0032] In this utility model, when r is less than or equal to any integer value of Q, the U-phase parallel branch... The neutral point and the parallel branch of phase U With equal spacing between the outgoing terminals, only one bridging conductor is needed to achieve a U-phase parallel branch. parallel branch with U phase The series connection is suitable for platform-based application expansion and saves manufacturing and processing costs. Attached Figure Description

[0033] Figure 1 The U-phase parallel branch provided in Embodiment 1 of this utility model Structural diagram;

[0034] Figure 2 The U-phase parallel branch provided in Embodiment 1 of this utility model Structural diagram;

[0035] Figure 3 The U-phase parallel branch provided in Embodiment 1 of this utility model Structural diagram;

[0036] Figure 4 The U-phase parallel branch provided in Embodiment 1 of this utility model Structural diagram;

[0037] Figure 5 This is a distribution diagram of the U-phase parallel branch, V-phase parallel branch and W-phase parallel branch provided in Embodiment 1 of this utility model;

[0038] Figure 6 The U-phase parallel branch provided in Embodiment 2 of this utility model Structural diagram;

[0039] Figure 7 The U-phase parallel branch provided in Embodiment 2 of this utility model Structural diagram;

[0040] Figure 8 The U-phase parallel branch provided in Embodiment 3 of this utility model The structural diagram. Detailed Implementation

[0041] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0042] Example 1

[0043] This embodiment provides a flat wire short-pitch winding, which is wound on the stator of a motor. The flat wire short-pitch winding includes a U-phase parallel branch, a V-phase parallel branch and a W-phase parallel branch wound on the stator of the motor.

[0044] The number of slots per pole per phase of the motor Q is an integer ≥ 2; 2P is the number of rotor poles of the motor, and Z is the number of stator slots of the motor stator; the number of U-phase parallel branches, V-phase parallel branches, and W-phase parallel branches is set to 2Q, and the 2Q U-phase parallel branches are marked as follows: to ;

[0045] U-phase parallel branch To U-phase parallel branch The lead-out end is located on the outermost flat wire layer, the neutral point is located on the innermost flat wire layer, and the winding direction is reversed; in this embodiment, the forward winding direction is consistent with the motor rotation direction, or the reverse winding direction is consistent with the motor rotation direction.

[0046] The stator slot has 2n flat wire layers; the flat wire layer numbers are assigned radially from the outside to the inside of the motor stator, and every two adjacent flat wire layers are assigned to the same slot layer group; the j-th flat wire layer in the i-th stator slot is denoted as... U-phase parallel branch To U-phase parallel branch The outgoing end is set as to Connect the U-phase parallel branches according to the specified flat wire conductor connection method. After winding the motor stator, a U-phase parallel branch can be obtained. The location of the neutral point;

[0047] Along the positive direction of the winding, from the U-phase parallel branch The neutral point is moved by 3Q stator slots to obtain the U-phase parallel branch. The outgoing end; among which, ;

[0048] U-phase parallel branch To U-phase parallel branch The output end is set in the innermost flat wire layer, the neutral point is set in the outermost flat wire layer, and the winding direction is set to positive; thus completing the winding of 2Q U-phase parallel branches.

[0049] The U-phase parallel branch, V-phase parallel branch, and W-phase parallel branch are arranged at equal intervals. In this embodiment, the V-phase parallel branch moves 2Q stator slots relative to the U-phase parallel branch along the motor rotation direction, and the W-phase parallel branch moves 2Q stator slots relative to the V-phase parallel branch along the motor rotation direction.

[0050] The flat wire conductors of the U-phase parallel branch, V-phase parallel branch, and W-phase parallel branch are connected in the same way. Specifically, the flat wire conductor connection method is as follows:

[0051] The slot layer group number is set as h along the radial direction of the motor stator from the outside to the inside; the flat wire conductor number of the U-phase parallel branch, V-phase parallel branch and W-phase parallel branch is marked as t; that is: For the t-th U-phase parallel branch, For the t-th V-phase parallel branch, For the t-th W-phase parallel branch, t is an integer from 1 to 2Q; the flat wire conductors of the U-phase parallel branch, V-phase parallel branch and W-phase parallel branch include crown ends and welded ends; the crown ends and welded ends are alternately arranged.

[0052] Within the same slot layer group, the flat wire conductor bridges two adjacent flat wire layers. The span at the crown end is 3Q+1 stator slots, and the span at the welded end is 3Q-1 stator slots.

[0053] Between the h-th slot layer group and the h+1-th slot layer group, the flat wire conductor bridges two adjacent flat wire layers located in the h-th slot layer group and the h+1-th slot layer group, respectively; if t is odd and h is odd, the span at the crown end is 3Q stator slots; if t is odd and h is even, the span at the crown end is 3Q+2 stator slots; if t is even and h is odd, the span at the crown end is 3Q+2 stator slots; if t is even and h is even, the span at the crown end is 3Q stator slots.

[0054] The winding methods for flat wire short-pitch windings specifically include:

[0055] The flat wire layer number is assigned radially from the outside to the inside of the motor stator, and every two adjacent flat wire layers are assigned to the same slot layer group; the j-th flat wire layer in the i-th stator slot is denoted as... ;

[0056] Based on the number of rotor poles and the number of stator slots, the number of U-phase parallel branches, 2Q, can be calculated using the following formula:

[0057]

[0058] Where 2P is the number of rotor poles of the motor, and Z is the number of stator slots of the motor stator.

[0059] Mark the 2Q parallel U-phase branches as follows: to Select U-phase parallel branch To U-phase parallel branch The outgoing end is to The neutral point is set at the innermost flat wire layer, and the winding direction is set to the opposite direction;

[0060] Connect the U-phase parallel branch To U-phase parallel branch The lead-out end is located in the innermost flat wire layer, the neutral point is located in the outermost flat wire layer, and the winding direction is set to positive.

[0061] Along the positive direction of the winding, U-phase parallel branch Neutral point to U-phase parallel branch The outgoing terminals are spaced 3Q stator slots apart; among them, ;

[0062] The number of U-phase parallel branches, V-phase parallel branches, and W-phase parallel branches are equal, and the U-phase parallel branches, V-phase parallel branches, and W-phase parallel branches are arranged at equal intervals. In this embodiment, the V-phase parallel branch moves 2Q stator slots relative to the U-phase parallel branch along the motor rotation direction, and the W-phase parallel branch moves 2Q stator slots relative to the V-phase parallel branch along the motor rotation direction.

[0063] The winding rules for single U-phase parallel branches, V-phase parallel branches, and W-phase parallel branches are as follows:

[0064] Within the same slot layer group, the flat wire conductor bridges two adjacent flat wire layers. The span at the crown end is 3Q+1 stator slots, and the span at the welded end is 3Q-1 stator slots.

[0065] The slot layer group number is set as h from the outside to the inside along the radial direction of the motor stator; the flat wire conductor number of the U-phase parallel branch, V-phase parallel branch and W-phase parallel branch is marked as t;

[0066] Between the h-th slot layer group and the h+1-th slot layer group, the flat wire conductor bridges two adjacent flat wire layers located in the h-th slot layer group and the h+1-th slot layer group, respectively; if t is odd and h is odd, the span at the crown end is 3Q stator slots; if t is odd and h is even, the span at the crown end is 3Q+2 stator slots; if t is even and h is odd, the span at the crown end is 3Q+2 stator slots; if t is even and h is even, the span at the crown end is 3Q stator slots.

[0067] like Figures 1 to 4 As shown, taking a commonly used 72-slot 12-pole motor as an example, there are 2 stator slots per phase per pole, 4 parallel branches for U phase, V phase and W phase, and 8 flat wire layers in a single stator slot. The radial directions from the outside to the inside are a, b, c, d, e, f, g and h, which correspond to the 1st to 8th flat wire layers.

[0068] U-phase parallel branch The windings, such as Figure 1 As shown, solid lines represent the crown end, dashed lines represent the welding end, a and b are the first slot layer group, c and d are the second slot layer group, e and f are the third slot layer group, and g and h are the fourth slot layer group. U-phase parallel branch. The outgoing end is in the outermost layer a1. In the same slot layer, the span of the crown end is 7 slots; the span of the crown end of the flat wire conductor from the first slot layer to the second slot layer is 6 slots, the span of the crown end of the flat wire conductor from the second slot layer to the third slot layer is 8 slots, and the span of the crown end of the flat wire conductor from the third slot layer to the fourth slot layer is 6 slots. The span of the welding end of the short-pitch flat wire winding of the motor is 5, which facilitates the twisting and shaping of the welding end conductor by the tooling, and makes the manufacturing and processing of the motor stator very convenient.

[0069] Connect the U-phase parallel branches according to the specified flat wire conductor connection method. After winding the motor stator, a U-phase parallel branch can be obtained. The neutral point is h9.

[0070] U-phase parallel branch The winding connection is as follows: a1→b68→a61→b56→a49→b44→a37→b32→a25→b20→a13→b8→c2→d69→c62→d57→c50→d45→c38→d33→c26→d21→c14→d9→e1→f68→e61→f56→e49→f44→e37→f32→e25→f20→e13→f8→g2→h69→g62→h57→g50→h45→g38→h33→g26→h21→g14→h9.

[0071] U-phase parallel branch The winding connection is as follows: a2→b69→a62→b57→a50→b45→a38→b33→a26→b21→a14→b9→c1→d68→c61→d56→c49→d44→c37→d32→c25→d20→c13→d8→e2→f69→e62→f57→e50→f45→e38→f33→e26→f21→e14→f9→g1→h68→g61→h56→g49→h44→g37→h32→g25→h20→g13→h8.

[0072] U-phase parallel branch The winding connection is as follows: h15→g20→h27→g32→h39→g44→h51→g56→h63→g68→h3→g8→f14→e19→f26→e31→f38→e43→f50→e55→f62→e67→f2→e7→d15→c20→d27→c32→d39→c44→d51→c56→d63→c68→d3→c8→b14→a19→b26→a31→b38→a43→b50→a55→b62→a67→b2→a7.

[0073] U-phase parallel branch The winding connection is as follows: h14→g19→h26→g31→h38→g43→h50→g55→h62→g67→h2→g7→f15→e20→f27→e32→f39→e44→f51→e56→f63→e68→f3→e8→d14→c19→d26→c31→d38→c43→d50→c55→d62→c67→d2→c7→b15→a20→b27→a32→b39→a44→b51→a56→b63→a68→b3→a8.

[0074] The V-phase parallel branch moves 4 stator slots relative to the U-phase parallel branch along the direction of motor rotation, and the W-phase parallel branch moves 4 stator slots relative to the V-phase parallel branch along the direction of motor rotation. Similarly, the windings of the V-phase parallel branch and the W-phase parallel branch can be completed.

[0075] like Figure 5 As shown, the number of parallel branches of phase U, phase V, and phase W are equal, the magnetomotive force of each phase winding is uniformly distributed, and the magnitude and phase of the magnetomotive force of each parallel branch are consistent, effectively avoiding the generation of circulating currents. In this embodiment, the short-pitch winding can effectively reduce the 5th and 7th harmonics of the motor, reduce the harmonic content during motor operation, reduce torque fluctuations, improve vibration noise and eddy current losses, and further improve the operating efficiency and reliability of the motor.

[0076] Example 2

[0077] This embodiment provides a flat wire short-pitch winding, which, based on the flat wire short-pitch winding disclosed in Embodiment 1, includes a U-phase parallel branch. Neutral point to U-phase parallel branch The outgoing terminals are connected using bridging conductors to obtain Q parallel U-phase branches. That is, the U-phase parallel branch. Parallel branch with U phase .

[0078] like Figure 6 and Figure 7 As shown, taking a commonly used 72-slot 12-pole motor as an example, there are 2 stator slots per phase per pole, 2 parallel branches for U phase, 2 parallel branches for V phase, and 2 parallel branches for W phase. There are 8 layers of flat wire in a single stator slot, and the radial directions from the outside to the inside are a, b, c, d, e, f, g, and h, which correspond to the 1st to 8th flat wire layers.

[0079] U-phase parallel branch Parallel branch with U phase By connecting the bridging conductors h9 to h15 in series, a U-phase parallel branch is obtained. The specific winding connection is as follows: a1→b68→a61→b56→a49→b44→a37→b32→a25→b20→a13→b8→c2→d69→c62→d57→c50→d45→c38→d33→c26→d21→c14→d9→e1→f68→e61→f56→e49→f44→e37→f32→e25→f20→e13→f8→g2→h69→g62→h57→g50→h45→g38→h33→g26→h21→g1 4→h9→h15→g20→h27→g32→h39→g44→h51→g56→h63→g68→h3→g8→f14→e19→f26→e31→f38→e43→f50→e55→f62→e67→f2→e7→d15→c20→d27→c32→d39→c44→d51→c56→d63→c68→d3→c8→b14→a19→b26→a31→b38→a43→b50→a55→b62→a67→b2→a7.

[0080] U-phase parallel branch Parallel branch with U phase By connecting the bridging conductors h8 to h14 in series, a U-phase parallel branch is obtained. The specific winding connection is as follows: a2→b69→a62→b57→a50→b45→a38→b33→a26→b21→a14→b9→c1→d68→c61→d56→c49→d44→c37→d32→c25→d20→c13→d8→e2→f69→e62→f57→e50→f45→e38→f33→e26→f21→e14→f9→g1→h68→g61→h56→g49→h44→g37→h32→g25→h20→g1 3→h8→h14→g19→h26→g31→h38→g43→h50→g55→h62→g67→h2→g7→f15→e20→f27→e32→f39→e44→f51→e56→f63→e68→f3→e8→d14→c19→d26→c31→d38→c43→d50→c55→d62→c67→d2→c7→b15→a20→b27→a32→b39→a44→b51→a56→b63→a68→b3→a8.

[0081] Similarly, bridging conductors are used to connect the V-phase parallel branches. Neutral point to V-phase parallel branch The outgoing terminals obtain Q parallel branches of V phases. Use bridging conductors to connect the parallel branches of phase W. Neutral point to W-phase parallel branch The outgoing terminal obtains Q parallel branches of phase W. .

[0082] Example 3

[0083] This embodiment provides a flat wire short-pitch winding, which, based on the flat wire short-pitch winding disclosed in Embodiment 2, connects Q U-phase parallel branches in series through bridging conductors. Obtain U-phase parallel branch ;

[0084] like Figure 8 As shown, taking a commonly used 72-slot 12-pole motor as an example, each pole and each phase has 2 stator slots, and 1 parallel branch for the U-phase, 1 parallel branch for the V-phase, and 1 parallel branch for the W-phase. Each stator slot contains 8 layers of flat wire, radially labeled a, b, c, d, e, f, g, and h from the outside to the inside, corresponding to the 1st to 8th flat wire layers. (U-phase parallel branch) Parallel branch with U phase By connecting the bridging conductors a7 to a2 in series, a U-phase parallel branch is obtained. .

[0085] Similarly, by bridging conductors, Q parallel branches of V phases are connected in series. Obtain V-phase parallel branch ; Q parallel branches of W phase connected in series by bridging conductors Obtain the parallel branch of phase W .

[0086] Example 4

[0087] This embodiment provides a three-phase motor, including a motor stator; the motor stator is provided with a flat wire short-pitch winding as described in any one of embodiments 1 to 3.

[0088] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0089] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A flat wire short-pitch winding, characterized in that, This includes the U-phase parallel branch, V-phase parallel branch, and W-phase parallel branch wound on the motor stator; The number of stator slots per pole per phase of the motor is Q is an integer ≥ 2; 2P is the number of rotor poles of the motor, and Z is the number of stator slots of the motor; the number of U-phase parallel branches is set to 2Q, and the 2Q U-phase parallel branches are marked as follows: to ; U-phase parallel branch To U-phase parallel branch The lead-out end is located on the outermost flat wire layer, the neutral point is located on the innermost flat wire layer, and the winding direction is set to the opposite direction. U-phase parallel branch To U-phase parallel branch The lead-out end is located in the innermost flat wire layer, the neutral point is located in the outermost flat wire layer, and the winding direction is set to positive. Along the positive direction of the winding, U-phase parallel branch Neutral point to U-phase parallel branch The outgoing terminals are spaced 3Q stator slots apart; among them, ; The number of U-phase parallel branches, V-phase parallel branches, and W-phase parallel branches are equal, and the U-phase parallel branches, V-phase parallel branches, and W-phase parallel branches are arranged at equal intervals.

2. The flat wire short-pitch winding according to claim 1, characterized in that, The stator slot has 2n flat wire layers; the flat wire layers are numbered radially from the outside to the inside, and every two adjacent flat wire layers are designated as the same slot layer group; the j-th flat wire layer in the i-th stator slot is denoted as... U-phase parallel branch To U-phase parallel branch The outgoing end is set as to .

3. The flat wire short-pitch winding according to claim 1, characterized in that, The flat conductors of the U-phase parallel branch, V-phase parallel branch, and W-phase parallel branch include a crown end and a welded end; the crown end and the welded end are alternately arranged.

4. The flat wire short-pitch winding according to claim 2, characterized in that, The flat wire conductor connection method for the U-phase parallel branch, V-phase parallel branch, and W-phase parallel branch is as follows: The slot layer group number is set as h from the outside to the inside along the radial direction of the motor stator; the flat wire conductor number of the U-phase parallel branch, V-phase parallel branch and W-phase parallel branch is marked as t; Within the same slot layer group, the flat wire conductor bridges two adjacent flat wire layers. The span at the crown end is 3Q+1 stator slots, and the span at the welded end is 3Q-1 stator slots. Between the h-th slot layer group and the h+1-th slot layer group, the flat wire conductor bridges two adjacent flat wire layers located in the h-th slot layer group and the h+1-th slot layer group, respectively; if t is odd and h is odd, the span at the crown end is 3Q stator slots; if t is odd and h is even, the span at the crown end is 3Q+2 stator slots; if t is even and h is odd, the span at the crown end is 3Q+2 stator slots; if t is even and h is even, the span at the crown end is 3Q stator slots.

5. The flat wire short-pitch winding according to claim 1, characterized in that, The positive direction of the winding is consistent with the rotation direction of the motor.

6. The flat wire short-pitch winding according to claim 1, characterized in that, The reverse direction of the winding is the same as the direction of motor rotation.

7. The flat wire short-pitch winding according to claim 1, characterized in that, The V-phase parallel branch moves 2Q stator slots relative to the U-phase parallel branch along the direction of motor rotation, and the W-phase parallel branch moves 2Q stator slots relative to the V-phase parallel branch along the direction of motor rotation.

8. The flat wire short-pitch winding according to claim 1, characterized in that, U-phase parallel branch Neutral point to U-phase parallel branch The outgoing terminals are connected using bridging conductors to obtain Q parallel U-phase branches. ; V-phase parallel branch Neutral point to V-phase parallel branch The outgoing terminals are connected using bridging conductors to obtain Q parallel V-phase branches. ; W-phase parallel branch Neutral point to W-phase parallel branch The outgoing terminals are connected using bridging conductors to obtain Q parallel branches of W phases. .

9. The flat wire short-pitch winding according to claim 1, characterized in that, Q parallel branches of U phase A U-phase parallel branch is obtained by bridging the conductors in series. ; Q parallel branches with V phases A V-phase parallel branch is obtained by connecting the bridging conductors in series. ; Q parallel branches of W phase A parallel branch of phase W is obtained by bridging the conductors in series. .

10. A three-phase motor, comprising a motor stator; wherein the motor stator is provided with a flat wire short-pitch winding as described in any one of claims 1 to 9.

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