Motor stator winding mechanism with odd-number-layer flat wires
By designing the stator winding structure of the odd-numbered flat wire motor and adopting an integrated stator core and odd-numbered flat wire layers, the number of series turns per phase of the flat wire motor can be flexibly adjusted, which reduces production costs and increases production speed, and solves the problem of back electromotive force instability caused by even-numbered winding layers.
Patent Information
- Application Number
- CN202422577483.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-24
- Publication Date
- 2025-09-16
- Estimated Expiration
- 2034-10-24
AI Technical Summary
Existing flat wire motor windings mostly have an even number of layers, resulting in the back electromotive force being too low or too high, requiring changes to the axial length of the stator and rotor or the withstand voltage value of the electronic control unit, increasing production costs and processes.
A stator winding structure for an odd-number-layer flat wire motor is designed. It adopts an integrated stator core and odd-number-layer flat wires. The winding consists of three phases, U, V, and W. The windings are connected in series or in parallel through bridge wires, and the conductors are cyclically distributed within the mechanical angle of the pole pair.
The flexible adjustment of the number of series turns per phase of the flat wire motor is achieved, which reduces production costs, increases production speed, and breaks through the limitation of even number of layers.
Smart Images
Figure CN223348442U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motors, in particular to a stator winding mechanism for an odd-number-layer flat wire motor. Background Art
[0002] As an important component of commonly used production or transportation tools, the motor needs to match power and torque according to actual needs. The existing flat wire motor windings are mostly even-layered. Since the stator and rotor slots of the motor are not easy to change, the even-layer flat wire motor often has a back electromotive force that is too low or too high. This requires changing the axial length of the stator and rotor or changing the withstand voltage value of the electronic control unit, which will increase the production cost and production process of the motor. Utility Model Content
[0003] The purpose of the utility model is to provide a stator winding mechanism for an odd-number-layer flat wire motor to solve the problems raised in the above-mentioned background technology.
[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: a stator winding mechanism for an odd-layer flat wire motor, comprising a stator core and a winding; the core is an integral type, comprising sector teeth and parallel slots, the stator core is a cylinder, the sector teeth and the parallel slots are arranged at intervals, the sector teeth and the parallel slots are evenly distributed radially on the outer periphery of the stator core, and the edges of the sector teeth are parallel to the radial lines of the stator core; the winding comprises a three-phase winding of U, V, and W phases arranged in sequence in a circular ring shape, each phase of the winding comprises at least one winding branch, and the winding is a flat wire, and the number of flat wire layers is an odd number of layers.
[0005] Preferably, the winding has two branches, which are connected in series or in parallel via a bridge line.
[0006] Preferably, each of the two branches completely passes through the entire stator core of the motor, and conductors are distributed in the parallel slots.
[0007] Preferably, the conductors are uneven, fixed within a mechanical angle of a pair of poles, and cyclically distributed according to the number of pole pairs.
[0008] Preferably, the specification of the flat wire is 1 square millimeter to 30 square millimeters.
[0009] The beneficial effects of this utility model include an odd number of flat wire layers, which allows for better adjustment of the number of series turns per phase of the flat wire motor to match different motor performance requirements. Furthermore, each phase winding consists of two branches, which can be connected in parallel or in series via a bridge wire, thereby enabling a wider range of winding adjustments for odd-numbered flat wire layers. This overcomes the constraint that existing flat wire motors can only have an even number of layers, allowing for unrestricted selection of layers during flat wire motor design, achieving better matching of the number of series turns per phase, reducing production costs, and increasing production speed. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a structural diagram of the odd-layer stator winding.
[0011] Figure 2 This is a schematic diagram of the slot numbers and slot positions of the conductor slots of the odd-layer stator winding.
[0012] Figure 3 This is a schematic diagram of the U-phase winding structure.
[0013] Figure 4 This is a schematic diagram of the winding method of a branch of the U phase.
[0014] Figure 5 This is a diagram of the winding direction of the crown end.
[0015] Figure 6 This is a schematic diagram of the winding direction of the torsional welding end.
[0016] The reference numerals in the figure are: stator core 100 ; winding 200 ; slot number 101 ; slot position 102 . DETAILED DESCRIPTION
[0017] In the following description, numerous specific details are provided to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features known in the art are not described to avoid confusion with the present invention.
[0018] Reference Figures 1 to 6This solution includes a stator core 100 and a winding 200; the stator core 100 is an integrated type, including sector teeth and parallel slots, the stator core 100 is a cylinder, the sector teeth and the parallel slots are arranged at intervals, the sector teeth and the parallel slots are evenly distributed radially on the outer periphery of the stator core 100, and the edges of the sector teeth are parallel to the radial line of the stator core; the winding includes a three-phase winding of U, V, and W phases arranged in a circular ring in sequence, each phase of the winding 200 includes at least one winding branch, and the winding is a flat wire, the specification of the flat wire is 1 square millimeter to 30 square millimeters, and the number of flat wire layers is an odd number of layers.
[0019] Flat-wire motors with odd-numbered winding layers have two branches per phase (200). These branches can be connected in series or in parallel using bridge wires to create more winding combinations (200) to suit different scenarios. Each branch runs completely across the entire stator of the motor, but the number of conductors in the slots may be uneven. The two branches are combined to form a symmetrical winding that fills every parallel slot. The number of conductors is fixed within the mechanical angle of a pole pair and is distributed cyclically according to the number of pole pairs.
[0020] This solution uses an 8-pole, 48-slot motor with three winding layers, using the U phase. The three-layer winding is divided into two branches. The flat wires of the two branches are connected in parallel and wound with hairpins through 6*M slots, N layers, where N is an odd number ≥3 and M is an even number ≥6. In the U-phase winding, for the first branch, the points are marked according to the order in which the current flows through the slots. Starting from position a or c in the first slot, the winding goes around the slots on the same layer, then goes to the next slot adjacent to the next one, and then the next winding goes back to the next slot adjacent to the previous one.
[0021] Taking an 8-pole, 48-slot three-layer flat wire as an example, the winding connection routes in the first branch of the U-phase winding are 7c, 2c, 44b, 2a, 44a, 38b, 44c, 37c, 31b, 37a, 31a, 25b, 31c, 26c, 20b, 26a, 20a, 14b, 20c, 13c, 7b, 13a, 7a, and 1b.
[0022] The second branch connection routes are 8c, 1c, 43b, 1a, 43a, 37b, 43c, 38c, 32b, 38a, 32a, 26b, 32c, 25c, 19b, 25a, 19a, 13b, 19c, 14c, 8b, 14a, 8a, and 2b.
[0023] Among them, 1b can be connected to 8c to realize the series connection of the two branches, or it can be connected to 8c through 7c to realize the parallel connection of the two branches.
[0024] The odd-number-layer flat wire stator winding is applied to the odd-number-layer flat wire motor, which realizes the adjustment of more winding turns of the flat wire motor, reduces the production cost and improves the production speed.
[0025] As described above, although the present invention has been shown and described with reference to specific preferred embodiments, it should not be interpreted as limiting the present invention itself. Various changes may be made to it in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims
1. An odd-layer flat wire motor stator winding structure, characterized in that: It includes a stator core and a winding; the core is an integral body, including sector teeth and parallel slots, the stator core is a cylinder, the sector teeth and the parallel slots are arranged at intervals, the sector teeth and the parallel slots are evenly distributed on the outer periphery of the stator core in the radial direction, and the edges of the sector teeth are parallel to the radial line of the stator core; the winding includes a three-phase winding of U, V, and W phases arranged in sequence in a circular ring shape, each phase of the winding includes at least one winding branch, and the winding is a flat wire with an odd number of flat wire layers.
2. The stator winding structure of an odd-layer flat wire motor according to claim 1, characterized in that: The winding has two branches, which are connected in series or in parallel via a bridge line.
3. The stator winding structure of the odd-layer flat wire motor according to claim 2, characterized in that: Each of the two branches completely passes through the entire stator core of the motor, and conductors are distributed in the parallel slots.
4. The stator winding structure of the odd-layer flat wire motor according to claim 3, characterized in that: The conductors are non-uniform, fixed within the mechanical angle of a pair of poles, and distributed cyclically according to the number of pole pairs.
5. The stator winding structure of the odd-layer flat wire motor according to claim 1, characterized in that: The specification of the flat wire is 1 square millimeter to 30 square millimeters.