Flat wire motor stator winding and flat wire motor

Abstract

The application discloses a flat wire motor stator winding, which comprises a stator slot, a plurality of conductors are arranged in the stator slot, the number of the conductors is 6 layers, each pole and each phase is equal to 3, the conductors in the stator slot are arranged in a UUUWWWVVV circumferential direction, and the conductors in the stator slot can be connected in parallel in 6 branches or in parallel in 3 branches. The same layer of the application has only two kinds of hairpins, which are respectively one span 11 hairpin and two span 8 hairpins, and the outgoing line and the star point are located in the same layer hairpin. The outgoing line and the star point can be located at the twisted wire end (welding end) or the plug-in wire end (crown end). The difference is only that the outgoing line and the star point hairpins are different, and the rest of the structures are the same. The hairpin types can be greatly reduced.

Description

Technical Field

[0001] This invention belongs to the field of flat wire motor technology, and specifically relates to a stator winding for a flat wire motor and a flat wire motor. Background Technology

[0002] The integration of electric drive systems and the use of flat wire in motors are the main technical routes to achieve lightweighting and miniaturization. Flat wire winding motors use flat copper wires with a larger cross-sectional area in the stator windings. The windings are first made into a hairpin-like shape and inserted into the stator slots. Then, the ends of the hairpins are welded together at the other end. Compared with traditional round wire motors, they have advantages such as high power density, high energy conversion efficiency, and good NVH performance.

[0003] However, existing flat wire motors have the problem of having a large number of different types of hairpins. Therefore, a flat wire motor stator winding and motor are proposed to solve the above problems. Summary of the Invention

[0004] The main objective of this invention is to provide a stator winding for a flat wire motor and a flat wire motor, which solves the problem of the large variety of hairpin types in existing flat wire motors.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a flat wire motor stator winding, including stator slots, wherein multiple conductors are arranged in the stator slots, the number of conductors is 6 layers, each pole and each phase is equal to 3, the conductors in the stator slots are arranged circumferentially in the order UUUWWWVVV, and the conductors in the stator slots are 6 branches connected in parallel.

[0006] Furthermore, the conductors inside the stator slot are three branches connected in parallel.

[0007] An electric motor comprising the flat wire motor stator winding described in any of the preceding claims.

[0008] Compared with existing technologies, this invention has the following advantages: This invention uses only two types of hair clips in the same layer: one hair clip with a span of 11 and two hair clips with a span of 8. The lead wire and the star point are located on the hair clips in the same layer. The lead wire and the star point can be located at the twisted end (welded end) or the inserted end (crown end), the only difference being the lead wire and star point hair clips; the rest of the structure is the same. This can greatly reduce the types of hair clips. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the lead-out structure at the welding end of the coil assembly;

[0010] Figure 2 This is a schematic diagram of the structure of branch road one;

[0011] Figure 3 This is a schematic diagram of the structure of branch road two;

[0012] Figure 4This is a structural diagram of branch road three;

[0013] Figure 5 This is a structural diagram of branch road four;

[0014] Figure 6 This is a structural diagram of branch road five;

[0015] Figure 7 This is a structural diagram of branch road six;

[0016] Figure 8 This is a schematic diagram of the wire outlet structure of the coil assembly. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 This invention discloses a stator winding for a flat wire motor, including stator slots and multiple conductors arranged within the stator slots. The number of conductors is 2N layers (N is an integer, greater than or equal to 1). This embodiment takes 6 layers of conductors in the stator slots as an example, with 3 conductors per pole and per phase. The conductors in the stator slots are arranged circumferentially according to the UUUWWWVVV pattern. The conductors in the stator slots can be connected in parallel with 6 branches (U1, U2, U3, U4, U5, U6), or in parallel with 3 branches, i.e., (U1, U2, U3) and (U4, U5, U6) forming a double winding in parallel. This invention has fewer types of hairpins, with only 2 types of hairpins in the same layer: one hairpin with a span of 11 and two hairpins with a span of 8. The lead wire and star point are located in the hairpins of the same layer. The lead wire and star point can be located at the twisted wire end (welded end) or the plug end (crown end). The only difference is the lead wire and star point hairpins; the rest of the structure is the same.

[0019] Furthermore, the present invention also discloses an electric motor, including the above-described flat wire motor stator winding.

[0020] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0021] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A stator winding for a flat wire motor, characterized in that: It includes a stator slot, in which multiple conductors are arranged. The number of conductors is 6 layers, with 3 conductors per pole and per phase. The conductors in the stator slot are arranged circumferentially in the order UUUWWWVVV, and the conductors in the stator slot are 6 branches connected in parallel.

2. The stator winding of a flat wire motor according to claim 1, characterized in that: The conductors inside the stator slot are connected in parallel in three branches.

3. An electric motor, characterized in that: Includes the flat wire motor stator winding as described in any one of claims 1 to 2.

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