Odd-layer flat wire motor stator winding structure and flat wire motor

Abstract

The utility model belongs to the field of flat wire motors, and particularly relates to an odd-layer flat wire motor stator winding structure and a flat wire motor, the odd-layer flat wire motor stator winding structure comprises a stator core and a three-phase winding, the inner side of the stator core is provided with 6 * M stator slots at equal intervals along the circumferential direction, each stator slot is divided into N layers, N is an odd number greater than or equal to 3, and M is an even number greater than or equal to 6; each phase winding comprises at least two branches, each branch is formed by winding a hairpin coil assembly, and the two branches are connected in parallel or in series through a bridge-crossing line. According to the utility model, the number of layers of the flat wire is an odd number, the number of series turns of each phase of the flat wire motor can be better adjusted so as to match different motor performance requirements, each phase of winding is composed of two branches, and the two branches can be connected in parallel or in series through the bridge-crossing wire, so that the winding adjustment of more odd layers of flat wires is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of flat wire motors, in particular to an odd-layer flat wire motor stator winding structure and a 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.

[0003] To solve the above problems, there are also odd-layer flat wire motors in the existing technology. However, the two branches of the same winding of the flat wire motor can only be set to parallel or series, and cannot be switched between series and parallel according to actual needs. For this reason, we propose an odd-layer flat wire motor stator winding structure and a flat wire motor. Utility Model Content

[0004] The utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0005] To this end, the technical solution adopted in this utility model is:

[0006] An odd-layer flat wire motor stator winding structure includes a stator core and a three-phase winding, wherein the stator core has 6*M stator slots spaced evenly apart along the circumferential direction, and each stator slot is divided into N layers, where N is an odd number ≥3 and M is an even number ≥6;

[0007] Each phase winding includes at least two branches, each branch is formed by winding a hairpin coil assembly, and the two branches are connected in parallel or in series via a bridge line.

[0008] Based on the above technical solution, its use principle and the technical effects produced are as follows:

[0009] The number of flat wire layers in the utility model is an odd number, which can better adjust the number of series turns of each phase of the flat wire motor to match different motor performance requirements. At the same time, each phase winding is composed of two branches, and these two branches can be connected in parallel or in series through a bridge line, thereby realizing more winding adjustments of odd-numbered flat wire layers. The utility model not only realizes the adjustment of more winding turns of the flat wire motor, but also reduces production costs and improves production speed.

[0010] In a preferred example, the present invention can be further configured as follows: each branch is annularly wound around the entire stator core, and two branches are combined to form a symmetrical winding that fills each stator slot.

[0011] In a preferred example, the present invention can be further configured as follows: the hairpin coil assembly includes a plurality of first coils, a plurality of second coils and a plurality of third coils, and the first coils, the second coils and the third coils are all made of flat wire, the number of flat wire layers is an odd number, and the specifications of the flat wire are 1 square millimeter to 30 square millimeters.

[0012] In a preferred example, the present invention can be further configured as follows: one end of the first coil, the second coil and the third coil are connected by a U-shaped hairpin to form a crown end, and the other end is formed into a welding end by twisting and welding.

[0013] In a preferred example, the present invention can be further configured as follows: the innermost layer of the welding end is connected to a three-phase lead wire, and the number of the three-phase lead wires is three, which are directly led out from the side of the welding end by twisting and bending.

[0014] In a preferred example, the present invention can be further configured as follows: the span of the first coil is K, the span of the second coil is K-1, and the span of the third coil is K+1, where K is the pitch of the motor and K is a positive integer;

[0015] The second coil and the third coil are arranged in the innermost slot layer or the outermost slot layer of the stator slot, the first coil is arranged in the remaining slot layers except the innermost slot layer or the outermost slot layer, and the two ends of the first coil are arranged across the two adjacent remaining slot layers.

[0016] In a preferred example, the present invention can be further configured as follows: the number of the stator slots is set to 48, and each stator slot is sequentially provided with three slot layers a, b, and c from the outside to the inside along the radial direction of the stator core.

[0017] In a preferred example, the present invention can be further configured as follows: the three-phase winding is respectively set to U, V, and W phases. When each phase winding includes two branches, the winding line of the first branch of the U phase is:

[0018] 7c, 2c, 44b, 2a, 44a, 38b, 44c, 37c, 31b, 37a, 31a, 25b, 31c, 26c, 20b, 26a, 20a, 14b, 20c, 13c, 7b, 13a, 7a, 1b;

[0019] The winding route of the second branch of the U phase is as follows:

[0020] 8c, 1c, 43b, 1a, 43a, 37b, 43c, 38c, 32b, 38a, 32a, 26b, 32c, 25c, 19b, 25a, 19a, 13b, 19c, 14c, 8b, 14a, 8a, 2b;

[0021] At this time, the winding lines of the V phase and the W phase are separated from the winding line of the U phase by q and 2q stator slots respectively in the direction of increasing stator slot numbers, where q is the number of slots per pole and per phase of the motor.

[0022] In a preferred example, the present invention can be further configured as follows: when the first branch and the second branch are connected in parallel, the two ends of the bridge line are connected to 7c and 8c respectively; when the first branch and the second branch are connected in series, the two ends of the bridge line are connected to 1b and 8c respectively.

[0023] According to one aspect of the present invention, the present invention provides a flat wire motor, comprising the above-mentioned odd-layer flat wire motor stator winding structure.

[0024] The nouns, conjunctions or adjectives involved in the above technical solution are explained as follows:

[0025] A fixed connection is a connection in which parts or components are fixed without any relative movement. There are two types of connections: detachable and non-detachable.

[0026] (1) A removable connection is a method of fastening components together using screws, splines, wedge pins, etc. This type of connection allows for disassembly during maintenance without damaging the components. However, the connectors used must be of the correct specifications (e.g., length of bolts, keys, wedge pins) and properly tightened.

[0027] (2) Non-detachable connections mainly refer to welding, riveting and tenoning. Since they need to be disassembled by forging, sawing or oxygen cutting when repairing or replacing, spare parts generally cannot be reused. At the same time, when making connections, attention should be paid to the quality of workmanship, technical inspection and remedial measures (such as calibration, polishing, etc.);

[0028] An active connection is a connection in which parts or components are fixed so that they can move relative to each other.

[0029] The above technical solution of the utility model has the following beneficial technical effects:

[0030] The number of flat wire layers in the present invention is an odd number, which can better adjust the number of series turns of each phase of the flat wire motor to match different motor performance requirements. At the same time, each phase winding is composed of two branches, and these two branches can be connected in parallel or in series through cross-bridge wires or twisted wire welding, so that series or parallel conversion can be performed according to needs, realizing more winding adjustments of odd-numbered layers of flat wire. Overall, the present invention not only realizes the adjustment of more winding turns of the flat wire motor, but also reduces production costs and improves production speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1This is a three-dimensional schematic diagram of the overall structure of Example 1 of the present utility model;

[0032] Figure 2 This is a three-dimensional schematic diagram of a card issuing coil assembly according to a first embodiment of the present invention;

[0033] Figure 3 This is a three-dimensional schematic diagram of the first coil structure of the first embodiment of the present utility model;

[0034] Figure 4 This is a three-dimensional schematic diagram of the second coil structure of the first embodiment of the present utility model;

[0035] Figure 5 This is a three-dimensional schematic diagram of the third coil structure of the first embodiment of the present utility model;

[0036] Figure 6 This is a schematic diagram of the stator slot number and position according to an embodiment of the present invention;

[0037] Figure 7 This is an expanded diagram of the U-phase winding of Example 1 of the present utility model;

[0038] Figure 8 This is an expanded view of the winding method of the first branch of the U phase in Example 1 of the present utility model;

[0039] Figure 9 This is a diagram of the winding direction of the crown end of Example 1 of the utility model;

[0040] Figure 10 This is a diagram of the winding direction of the welding end of Example 1 of the present utility model;

[0041] Figure 11 This is a connection diagram of the first branch and the second branch in series connection according to the first embodiment of the present invention;

[0042] Figure 12 This is a connection diagram of the first branch and the second branch in parallel according to the first embodiment of the present invention.

[0043] Reference numerals:

[0044] 1. Stator core; 2. Winding; 3. Stator slot; 4. First branch; 5. Second branch; 6. Hairpin coil assembly; 61. First coil; 62. Second coil; 63. Third coil; 64. Welding end; 65. Crown end; 7. Three-phase lead wire; 8. Bridge wire. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure. It should be noted that the embodiments of the present utility model and the features in the embodiments can be combined with each other in the absence of conflict.

[0046] Example 1:

[0047] According to the concept of this application, Figures 1 to 12 The following describes an embodiment of a stator winding 2 structure for an odd-numbered flat wire motor capable of being connected in series or in parallel. Specifically, the stator winding 2 structure for an odd-numbered flat wire motor is constructed as an integrated structure, comprising three components: a stator core 1, a winding 2, and a hairpin coil assembly 6. The present invention has 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 2 is composed of two branches, which can be connected in parallel or in series via a bridge wire 8, thereby enabling a wider range of adjustment options for the odd-numbered flat wire windings 2. This not only allows for adjustment of the number of turns of more flat wire motor windings 2, but also reduces production costs and increases production speed.

[0048] Combine Figures 1-12 As shown, the present invention provides an odd-layer flat wire motor stator winding 2 structure, comprising a stator core 1 and a three-phase winding 2. 6*M stator slots 3 are evenly spaced along the circumferential direction on the inner side of the stator core 1, and each stator slot 3 is divided into N layers, where N is an odd number ≥3 and M is an even number ≥6.

[0049] Each phase winding 2 includes at least two branches, each branch is formed by stacking the hairpin coil assembly 6, and the two branches are connected in parallel or in series through a bridge line, or the series or parallel connection of the motor windings is achieved only through the torsion distance of the welding end. This embodiment does not make specific restrictions here and can be selected according to actual conditions.

[0050] Regarding the technical solution of this embodiment, Figure 2 As shown, each branch is completely wound around the entire stator core 1 in a ring shape, and the two branches are combined to form a symmetrical winding 2 and fill each stator slot 3.

[0051] Regarding the technical solution of this embodiment, Figure 3-Figure 5As shown, the hairpin coil assembly 6 includes a plurality of first coils 61, a plurality of second coils 62 and a plurality of third coils 63, and the first coils 61, the second coils 62 and the third coils 63 are all made of flat wire, the number of flat wire layers is an odd number, and the cross-sectional area specification of the flat wire is 1 square millimeter to 30 square millimeters.

[0052] Furthermore, one end of the first coil 61, the second coil 62 and the third coil 63 are connected by a U-shaped hairpin to form a crown end 65, and the other end is twisted and welded to form a welding end 64. By using the U-shaped hairpin to connect the coils together, it can be ensured that the position of the coils on the stator remains unchanged and can withstand greater forces and torques. In addition, by connecting the ends of the coils together by twisting and welding, it can be ensured that the gap between the coils is small and the slot fill rate is high, thereby reducing energy loss and the possibility of failure.

[0053] According to the technical solution of this embodiment, the span of the first coil 61 is the pitch K, the span of the second coil 62 is K-1, and the span of the third coil 63 is K+1, where K is the pitch of the motor and K is a positive integer;

[0054] The second coil and the third coil are arranged in the innermost slot layer or the outermost slot layer of the stator slot, and the first coil is arranged in the remaining slot layers of the stator slot, and the two ends of the first coil are arranged across the two adjacent slot layers. In the technical solution of this embodiment, the second coil 62 and the third coil 63 are arranged in the innermost slot layer of the stator slot 3, and the first coil 61 is arranged in the outer slot layer of the stator slot 3, and the two ends of the first coil 61 are arranged across the two adjacent outer slot layers. Figure 6 As shown, for example, when the stator slots 3 are arranged into three slot layers of a, b, and c from the outside to the inside or from the inside to the outside, the second coil and the third coil are arranged in the c layer, and the two ends of the first coil are respectively arranged across the a and b slot layers; when the stator slots 3 are arranged into five slot layers of a, b, c, d, and e from the outside to the inside, the second coil and the third coil are arranged in the e layer, and the two ends of the first coil are respectively arranged across the a and b slot layers, the b and c slot layers, and the c and d slot layers.

[0055] like Figure 7-10 As shown, the technical solution of this application is further explained in conjunction with specific embodiments:

[0056] In this embodiment, an 8-pole 48-slot motor is taken as an example. The motor's three-phase winding 2 is set to U, V, and W phases respectively. The winding 2 has three layers. Taking the U phase as an example, the three-layer winding 2 is divided into two branches:

[0057] The winding circuit of the first branch of phase U is:

[0058] 7c, 2c, 44b, 2a, 44a, 38b, 44c, 37c, 31b, 37a, 31a, 25b, 31c, 26c, 20b, 26a, 20a, 14b, 20c, 13c, 7b, 13a, 7a, 1b;

[0059] The winding routes of the second branch of phase U are as follows:

[0060] 8c, 1c, 43b, 1a, 43a, 37b, 43c, 38c, 32b, 38a, 32a, 26b, 32c, 25c, 19b, 25a, 19a, 13b, 19c, 14c, 8b, 14a, 8a, 2b;

[0061] At this time, the winding lines of the V phase and the W phase are separated from the winding line of the U phase by q and 2q stator slots 3 respectively in the direction of increasing serial number of the stator slots 3, where q is the number of slots per pole and per phase of the motor.

[0062] Furthermore, if Figure 11 As shown, when the first branch and the second branch are connected in series, 1c and 8c are connected together by torsion welding, or the two ends of the bridge wire 8 are connected to 1b and 8c respectively, as shown in FIG. Figure 12 As shown, when the first branch and the second branch are connected in parallel, 7c and 8c can be directly used as connection terminals and directly welded by twisting, or the two ends of the bridge wire 8 can be connected to 7c and 8c respectively.

[0063] Specifically, the number of flat wire layers in the utility model is an odd number, which can better adjust the number of series turns of each phase of the flat wire motor to match different motor performance requirements. At the same time, each phase winding 2 is composed of two branches, and these two branches can be connected in parallel or in series through torsional welding or cross-bridge wire 8, thereby realizing more types of winding 2 adjustments of odd-numbered layers of flat wire. The utility model not only realizes the adjustment of more winding 2 turns of the flat wire motor, but also reduces production costs and improves production speed.

[0064] The structure of the stator winding 2 of an odd-layer flat wire motor provided by the present invention will be further described below in conjunction with the accompanying drawings and implementation examples.

[0065] An odd-layer flat wire motor stator winding 2 structure includes a stator core 1 and a three-phase winding 2. 6*M stator slots 3 are evenly spaced circumferentially inside the stator core 1, and each stator slot 3 is divided into N layers, where N is an odd number ≥3, M is an even number ≥6, and the number of slots per pole and per phase is q, where q is a multiple of 2.

[0066] Each phase winding 2 includes at least two branches, each branch is formed by a hairpin coil assembly 6 using lap winding, and the two branches are connected in parallel or in series through twisting of welding ends or a bridge wire 8 .

[0067] The working principle and usage process of the utility model: The number of flat wire layers in the utility model is an odd number, which can better adjust the number of series turns of each phase of the flat wire motor to match different motor performance requirements. At the same time, each phase winding 2 is composed of two branches, and these two branches can be connected in parallel or in series through the twisting of the welding end or the cross-bridge wire 8, thereby realizing more types of winding 2 adjustments of odd-numbered flat wire layers. The utility model not only realizes the adjustment of more winding 2 turns of the flat wire motor, but also reduces production costs and improves production speed.

[0068] Example 2:

[0069] This embodiment provides a flat wire motor, including the odd-layer flat wire motor stator winding structure described in the first embodiment.

[0070] It should be noted that the odd-layer flat wire motor stator winding structure and other components of the flat wire motor provided in this application can be designed, manufactured, and sold separately, or they can be assembled and sold as a whole. Whether they are formed as a single unit before assembly or as a whole after assembly, they all fall within the scope of protection of this application.

[0071] In the present invention, the term "plurality" refers to two or more than two, unless otherwise expressly defined. The term "and / or" used herein includes any and all combinations of one or more of the relevant listed items. Terms such as "installation", "connection", "connection", and "fixed" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0072] It should be noted that when an element is referred to as being "assembled to," "mounted to," "fixed to," or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0073] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0074] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An odd-layer flat wire motor stator winding structure, comprising a stator core and a three-phase winding, characterized in that: The inner side of the stator core is provided with 6*M stator slots spaced evenly along the circumferential direction, and each stator slot is divided into N layers, where N is an odd number ≥3 and M is an even number ≥6; Each phase winding includes at least two branches, each branch is formed by winding a hairpin coil assembly, and the two branches are connected in parallel or in series via a bridge line.

2. The stator winding structure of an odd-layer flat wire motor according to claim 1, characterized in that: Each branch is completely wound around the entire stator core in a ring shape, and the two branches are combined to form a symmetrical winding, filling every stator slot.

3. The stator winding structure of an odd-layer flat wire motor according to claim 2, characterized in that: The hairpin coil assembly includes a plurality of first coils, a plurality of second coils and a plurality of third coils, and the first coils, the second coils and the third coils are all made of flat wires, the number of flat wire layers is an odd number, and the cross-sectional area specification of the flat wires is 1 square millimeter to 30 square millimeters.

4. The stator winding structure of an odd-numbered flat wire motor according to claim 3, characterized in that: One end of the first coil, the second coil and the third coil are connected by a U-shaped hairpin to form a crown end, and the other end is formed into a welding end by twisting and expanding the coil outward and welding.

5. The stator winding structure of an odd-numbered flat wire motor according to claim 4, characterized in that: A certain layer of the welding end has three-phase lead wires, and the number of the three-phase lead wires is three, which are directly led out from the side of the welding end by twisting and bending.

6. The stator winding structure of an odd-layer flat wire motor according to claim 5, characterized in that: The span of the first coil is K, the span of the second coil is K-1, and the span of the third coil is K+1, where K is the pitch of the motor and K is a positive integer; The second coil and the third coil are arranged in the innermost slot layer or the outermost slot layer of the stator slot, the first coil is arranged in the remaining slot layers except the innermost slot layer or the outermost slot layer, and the two ends of the first coil are arranged across the two adjacent remaining slot layers.

7. The stator winding structure of an odd-layer flat wire motor according to claim 6, characterized in that: The number of the stator slots is set to 48, and each stator slot is sequentially provided with three slot layers a, b, and c from outside to inside along the radial direction of the stator core.

8. The stator winding structure of an odd-numbered flat wire motor according to claim 7, characterized in that: The three-phase winding is respectively set to U, V, and W phases. When each phase winding includes two branches, the winding line of the first branch of the U phase is: 7c, 2c, 44b, 2a, 44a, 38b, 44c, 37c, 31b, 37a, 31a, 25b, 31c, 26c, 20b, 26a, 20a, 14b, 20c, 13c, 7b, 13a, 7a, 1b; The winding route of the second branch of the U phase is as follows: 8c, 1c, 43b, 1a, 43a, 37b, 43c, 38c, 32b, 38a, 32a, 26b, 32c, 25c, 19b, 25a, 19a, 13b, 19c, 14c, 8b, 14a, 8a, 2b; At this time, the winding lines of the V phase and the W phase are separated from the winding line of the U phase by q and 2q stator slots respectively in the direction of increasing stator slot numbers, where q is the number of slots per pole and per phase of the motor.

9. The stator winding structure of an odd-layer flat wire motor according to claim 8, characterized in that: When the first branch is connected in parallel with the second branch, the two ends of the bridge line are connected to 7c and 8c respectively. When the first branch is connected in series with the second branch, the two ends of the bridge line are connected to 1b and 8c respectively. Since the bridge is formed at the torsional welding end, its structure can be realized by torsional welding.

10. A flat wire motor, characterized in that: An odd-layer flat wire motor stator winding structure comprising any one of claims 1 to 9.

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