A flat wire conductor stator winding with four branches and a motor

Abstract

The present invention provides a flat wire conductor stator winding and a motor with four branches, including a flat wire conductor stator winding with four branches, which comprises a stator body, stator slots, flat wire conductors, and end conductors, wherein: z of the stator slots are provided on the stator body; 4n layers of flat wire conductors are provided in the stator slots; the 4n layers of flat wire conductors located in different stator slots are connected to each other by end conductors to form a winding; every n layers of flat wire conductors are connected by end conductors to form a branch. The flat wire conductor stator winding with four branches provided by the present invention solves the problem of branch imbalance in motors with the existing flat wire winding method through the structure of the stator body, stator slots, flat wire conductors, and end conductors; and achieves the purpose of equal resistance of the four branches formed by the flat wire winding method.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and particularly relates to a flat wire conductor stator winding with four branches and a motor. Background Art

[0002] A motor refers to an electromagnetic device that realizes the conversion or transmission of electrical energy based on the law of electromagnetic induction.

[0003] In traditional motor manufacturing, most adopt the most traditional round wire winding method, which can meet the needs of various winding designs. However, the slot fill factor of this winding method is not high, the end part is large, and the material utilization rate is low, which has always been a bottleneck in the development of round wire winding. To solve this problem, motors using flat wire winding methods have emerged. An existing motor using a flat wire winding method, such as a motor stator and a motor disclosed in a Chinese patent with the publication number CN206164230U, with a publication date of May 10, 2017, includes: a stator core, on the inner wall surface of the stator core, there are a plurality of stator teeth arranged at intervals along its circumference, and a stator slot is defined between two adjacent stator teeth; wherein the motor stator adopts a flat wire winding, and multiple layers of flat wire conductors are arranged in each stator slot. The slot fill factor of the flat wire winding method is high, greatly improving the efficiency and power density of the motor. At the same time, due to the tight combination of each layer of conductors in the flat wire, the heat dissipation level of the flat wire motor is higher than that of the round wire motor.

[0004] However, the above patent does not solve the problem of branch imbalance brought about by the flat wire winding method. Summary of the Invention

[0005] To solve the problems mentioned in the above background art, a flat wire conductor stator winding with four branches provided by the present invention includes a stator body, stator slots, flat wire conductors, and end conductors, wherein:

[0006] z stator slots are provided on the stator body; 4n layers of flat wire conductors are provided in the stator slots; the 4n layers of flat wire conductors in different stator slots are connected to each other by end conductors to form a winding; every n layers of flat wire conductors are connected by end conductors to form a branch.

[0007] Further, the inlet ends of the winding are all located in the innermost layer close to the inner diameter of the stator body, and the outlet ends are located in the outermost layer close to the outer diameter of the stator body.

[0008] Further, the flat wire conductors at both ends of the winding are two adjacent layers.

[0009] Further, the winding adopts wave winding.

[0010] The present invention also provides a motor, according to the flat wire conductor stator winding with four branches described in any one of the above, including a rotor, wherein:

[0011] The number of pole pairs of the rotor is p, and z / 2p is an integer.

[0012] Further, the winding is a three-phase winding including four branches.

[0013] Further, each branch of each phase of the winding occupies 6p slot positions in space.

[0014] Further, the positions of the n-layer flat wire conductors included in each branch are evenly distributed.

[0015] Further, the end conductor span is z / 2p, z / 2p - 1.

[0016] Further, the winding coefficient is sin[(z / 2p - 1) / z / 2p] * sin(1 / 12 * 360°) / (z / 6p) / sin(360° * p / z / 2).

[0017] A flat wire conductor stator winding with four branches provided by the present invention solves the problem of branch imbalance in motors with the existing flat wire winding method through the structure of the stator body, stator slots, flat wire conductors, and end conductors; and achieves the purpose of equal resistance of the four branches formed by the flat wire winding method.

[0018] The present invention also provides a motor adopting the above-mentioned flat wire conductor stator winding with four branches, which can not only greatly improve the efficiency and power density of the motor, but also improve the heat dissipation level of the motor and there will be no problem of branch imbalance in the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 It is a schematic structural diagram of the flat wire conductor stator winding with four branches provided by the present invention;

[0021] Figure 2 It is a schematic structural diagram of a part of the winding provided by the present invention;

[0022] Figure 3 It is a schematic diagram of the conductor numbers in the slots in the 01-slot winding expansion diagram provided by the present invention;

[0023] Figure 4 It is a connection schematic diagram of one branch of phase A provided by the present invention;

[0024] Figure 5 Schematic connection diagram of all branches of phase A provided by the present invention;

[0025] Figure 6 Schematic diagram of the expansion of the three-phase winding provided by the present invention.

[0026] Reference numerals:

[0027] 100 Stator body, 110 Stator slots, 120 Conductors in the slots

[0028] 130 End conductors Specific embodiments

[0029] In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0030] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present invention. In addition, the terms "first", "second", and similar terms do not denote any order, quantity, or importance, but are only used to distinguish different components. "Connection" or "connected" and similar terms do not limit to physical or mechanical connection, but may include electrical connection, optical connection, etc., whether direct or indirect.

[0031] In the present invention, the parameter z represents the number of stator slots; the parameter n represents the number of layers of flat wire conductors on each branch; the parameter p is the number of pole pairs of the rotor.

[0032] The present invention provides a flat wire conductor stator winding with four branches, including a stator body 100, stator slots 110, flat wire conductors 120, and end conductors 130, wherein: z of the stator slots 110 are provided on the stator body 100; 4n layers of flat wire conductors 120 are provided in the stator slots 110; the 4n layers of flat wire conductors 120 in different stator slots 110 are connected to each other by end conductors 130 to form a winding; every n layers of flat wire conductors 120 are connected by end conductors 130 to form a branch.

[0033] In specific implementation, such as Figure 1 , 2 , as shown in Figure 3, it includes a stator body 100, stator slots 110, flat wire conductors 120, and end conductors 130, where: z stator slots 110 are provided on the stator body 100; the z stator slots 110 are numbered 01, 02, 03... to z in counterclockwise order starting from the rightmost slot in the horizontal position.

[0034] There are 4n layers of flat wire conductors 120 in the stator slots 110; the 4n layers of flat wire conductors 120 in different stator slots 110 are connected to each other by end conductors 130 to form a winding; every n layers of flat wire conductors 120 are connected by end conductors 130 to form a branch; the flat wire conductors 120 are numbered a, b, c, d, e, f,... in sequence from the inner diameter to the outer diameter of the stator.

[0035] Preferably, the incoming line ends of the winding are all located in the innermost layer close to the inner diameter of the stator body 100, and the outgoing line ends are located in the outermost layer close to the outer diameter of the stator body 100.

[0036] Preferably, the flat wire conductors 120 at both ends of the winding are adjacent two layers.

[0037] Preferably, the winding adopts wave winding.

[0038] In specific implementation, the winding adopts wave winding; this kind of winding method can reduce the material consumption.

[0039] The present invention also provides a motor, which is characterized by including a rotor according to the flat wire conductor stator winding with four branches described in any one of the above items, where:

[0040] The number of pole pairs of the rotor is p, and z / 2p is an integer.

[0041] Preferably, the winding is a three-phase winding including four branches.

[0042] Preferably, each branch of each phase of the winding occupies 6p slot positions in space.

[0043] In specific implementation, each branch of each phase of the winding occupies 6p slot positions in space, making it equivalent to the short-pitch winding method of lap winding, with less harmonic content in the winding and a high winding coefficient.

[0044] Preferably, the positions of the n layers of flat wire conductors 120 included in each branch are evenly distributed.

[0045] In specific implementation, the positions of the n layers of flat wire conductors 120 included in each branch are evenly distributed to ensure the balance of each branch.

[0046] Preferably, the span of the end conductor 130 is z / 2p, z / 2p - 1.

[0047] Preferably, the winding factor is sin[(z / 2p - 1) / z / 2p] * sin(1 / 12 * 360°) / (z / 6p) / sin(360° * p / z / 2).

[0048] A specific embodiment provided by the present invention is as follows: taking n = 8, z = 48, p = 4 as an example, as Figure 4 shown, starting from the a layer of slot 02 for wire inlet, the span of the end conductor is z / 2p = 6, connecting the conductor of the a layer of slot 02 to the conductor of the b layer of slot 08, connecting the conductor of the b layer of slot 08 to the conductor of the a layer of slot 14, connecting the conductor of the a layer of slot 14 to the conductor of the b layer of slot 20, connecting the conductor of the b layer of slot 20 to the conductor of the a layer of slot 26, connecting the conductor of the a layer of slot 26 to the conductor of the b layer of slot 32, connecting the conductor of the b layer of slot 32 to the conductor of the a layer of slot 38, connecting the conductor of the a layer of slot 38 to the conductor of the b layer of slot 44. At this time, the winding has wound around the stator for one week, and the winding will return to slot 02. Connecting the conductor of the b layer of slot 44 to the conductor of the c layer of slot 02, connecting the conductor of the c layer of slot 02 to the conductor of the d layer of slot 08, the conductor of the d layer of slot 08 to the conductor of the c layer of slot 14, connecting the conductor of the c layer of slot 14 to the conductor of the d layer of slot 20, the conductor of the d layer of slot 20 to the conductor of the c layer of slot 26, connecting the conductor of the c layer of slot 26 to the conductor of the d layer of slot 32, the conductor of the d layer of slot 32 to the conductor of the c layer of slot 38, connecting the conductor of the c layer of slot 38 to the conductor of the d layer of slot 44. At this time, the winding has wound around the stator for two weeks, traversing the a, b, c, d layers of the conductors in the stator slots, and the winding will return to slot 02. In order to be able to traverse the e, f, g, h layers of the conductors in the stator slots by the winding, and at the same time have the effect of short pitch and improve the winding factor, the winding will be connected to slot 01. Connecting the conductor of the d layer of slot 44 to the conductor of the e layer of slot 01, connecting the conductor of the e layer of slot 01 to the conductor of the f layer of slot 07, connecting the conductor of the f layer of slot 07 to the conductor of the e layer of slot 13, connecting the conductor of the e layer of slot 13 to the conductor of the f layer of slot 19, connecting the conductor of the f layer of slot 19 to the conductor of the e layer of slot 25, connecting the conductor of the e layer of slot 25 to the conductor of the f layer of slot 31, connecting the conductor of the f layer of slot 31 to the conductor of the e layer of slot 37, connecting the conductor of the e layer of slot 37 to the conductor of the f layer of slot 43. At this time, the winding has wound around the stator for three weeks, and the winding will return to slot 01. Connecting the conductor of the f layer of slot 43 to the conductor of the g layer of slot 01, the conductor of the g layer of slot 01 to the conductor of the h layer of slot 07, the conductor of the h layer of slot 07 to the conductor of the g layer of slot 13, connecting the conductor of the g layer of slot 13 to the conductor of the h layer of slot 19, the conductor of the h layer of slot 19 to the conductor of the g layer of slot 25, connecting the conductor of the g layer of slot 25 to the conductor of the h layer of slot 31, the conductor of the h layer of slot 31 to the conductor of the g layer of slot 37, connecting the conductor of the g layer of slot 37 to the conductor of the h layer of slot 43. At this time, the winding has wound around the stator for four weeks, traversing the a, b, c, d, e, f, g, h layers of the conductors in the stator slots. The h layer of slot 43 is the wire outlet end, and the a layer of slot 02 is the wire inlet end. Among them, the conductors in the stator slots traversed and the end conductors form the first branch of phase A.

[0049] The winding method of the second branch of phase A is as follows Figure 5 shown. The incoming line end of the second branch of phase A is the a layer of slot 01, and the outgoing line end is the h layer of slot 42. The winding principle is similar to that of the above-mentioned one branch, which is equivalent to rotating the first branch clockwise to start winding from the a layer of slot 01; the incoming line end of the third branch of phase A is the a layer of slot 08, and the outgoing line end is the h layer of slot 01. The winding principle is similar to that of the above-mentioned branch, which is equivalent to rotating the first branch clockwise to start winding from the a layer of slot 08; the incoming line end of the fourth branch of phase A is the a layer of slot 07, and the outgoing line end is the h layer of slot 48. The winding principle is similar to that of the above-mentioned branch, which is equivalent to rotating the first branch clockwise to start winding from the a layer of slot 07, and will not be elaborated here.

[0050] These 4 branches are connected in parallel to jointly form the phase A winding.

[0051] The winding methods of the four branches of phase B are as follows Figure 6 shown. The incoming line ends of the 4 branches of phase B are respectively the a layer of slot 06, the a layer of slot 05, the a layer of slot 12, and the a layer of slot 11, and the outgoing line ends are respectively the h layer of slot 47, the h layer of slot 46, the h layer of slot 05, and the h layer of slot 04; the incoming line ends of the 4 branches of phase C are respectively the a layer of slot 10, the a layer of slot 09, the a layer of slot 16, and the a layer of slot 15, and the outgoing line ends are respectively the h layer of slot 03, the h layer of slot 02, the h layer of slot 09, and the h layer of slot 08. The winding principles of phase B and phase C are similar to those of the above-mentioned phase A and will not be elaborated here.

[0052] Although terms such as stator body, stator slot, flat wire conductor, and end conductor are used more in this article, the possibility of using other terms is not excluded. The use of these terms is only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

[0053] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A flat wire conductor stator winding with four branches, characterized in that It includes a stator body (100), stator slots (110), flat wire conductors (120), and end conductors (130), where: z of the stator slots (110) are provided on the stator body (100); 4n layers of flat wire conductors (120) are provided in the stator slots (110); the 4n layers of flat wire conductors (120) located in different stator slots (110) are connected to each other by end conductors (130) to form a winding; every n layers of flat wire conductors (120) are connected by end conductors (130) to form a branch; The inlets of the winding are all located in the innermost layer close to the inner diameter of the stator body (100), and the outlets are located in the outermost layer close to the outer diameter of the stator body (100); The positions of the n layers of flat wire conductors (120) included in each branch are evenly distributed; the span of the end conductors (130) is z / 2p, z / 2p - 1; the winding factor is sin[(z / 2p - 1) / z / 2p]*sin(1 / 12 * 360°) / (z / 6p) / sin(360° * p / z / 2); It further includes a rotor, the number of pole pairs of the rotor is p, and z / 2p is an integer.

2. The flat wire conductor stator winding with four branches according to claim 1, characterized in that: The flat wire conductors (120) at both ends of the winding are two adjacent layers.

3. The flat wire conductor stator winding with four branches according to claim 1, characterized in that: The winding adopts wave winding.

4. A motor, comprising the flat wire conductor stator winding with four branches according to any one of claims 1-3, characterized in that: The winding is a three-phase winding including four branches.

5. A motor according to claim 4, characterized in that: Each branch of each phase of the winding occupies 6p slot positions in space.

Images