Electric machine stator and electric machine

Abstract

The utility model belongs to motor technical field discloses motor stator and motor, each winding unit includes first conductor and second conductor that do not cross each other and are connected, each winding unit includes N coils, N coils include first coil, second coil,..., Nth coil that suit sets along stator core radiality, along stator core radiality, first coil, third coil,..., N-3th coil, N-1th coil are connected in proper order and form first conductor, second coil, fourth coil,..., N-2th coil, Nth coil are connected in proper order and form second conductor, have realized motor in manufacturing process, simplified the forming process of stator winding, improved the winding efficiency of stator winding, reduced cost. Each winding unit includes two conductors that do not cross each other and are connected, reduced the conductor quantity, and the material is less, and the cost is low, and moreover, the number of welding spots of stator winding is reduced, and the space occupied by the axial end of stator winding is reduced.

Description

Technical Field

[0001] This utility model relates to the technical field, and in particular to a motor stator and a motor. Background Technology

[0002] The motor stator includes a stator core and a stator winding. The inner circumferential wall of the stator core is provided with multiple slots arranged at intervals along its circumference. Conductors are distributed in the multiple slots according to a certain pattern to form the stator winding.

[0003] There are currently two winding methods. One is to wind the stator core directly and then weld the ends to form the stator winding, such as the winding of a hairpin motor. The other is to first wind the conductor to form the stator winding and then install the stator winding into the stator core.

[0004] For the second type of stator winding, multiple long wires are typically used for winding, and then the ends of each wire are connected. However, the winding process involves wire crossing, resulting in a complex winding method, low winding efficiency, and high processing costs. Utility Model Content

[0005] The purpose of this utility model is to provide a motor stator and motor that can simplify the winding method of stator winding, improve winding efficiency, and reduce the processing cost of stator winding.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] The motor stator includes a stator core having a plurality of slots spaced apart along its circumference, and a stator winding having a plurality of phase windings, each phase winding including at least one winding unit, each winding unit including a first conductor and a second conductor that do not cross each other and are connected.

[0008] Each winding unit includes N coils, and the N coils include a first coil, a second coil, ..., an Nth coil that are sequentially wound along the radial direction of the stator core, where N is an even number greater than or equal to 4. Along the radial direction of the stator core, the first coil, the third coil, ..., the (N-3)th coil, and the (N-1)th coil are sequentially connected to form the first conductor, and the second coil, the fourth coil, ..., the (N-2)th coil, and the Nth coil are sequentially connected to form the second conductor.

[0009] As one possible implementation of the above-mentioned motor stator, the number of slots per pole per phase of the stator winding is 2, and each phase winding includes two winding units; in the first conductor and the second conductor of any winding unit, the interior of multiple slots of each conductor includes multiple first slots forming N / 2 coils, the interiors of multiple first slots of the same coil are located in the same layer of the stator core, and the interiors of first slots belonging to the same conductor but to different coils are located in different layers of the stator core.

[0010] As one possible implementation of the above-mentioned motor stator, for any coil among the first coil to the Nth coil in any winding unit, the first slot inside one end of each coil is called slot inside one, and the first slot inside the other end is called slot inside two; and for any winding unit, all slot inside one is located at the same magnetic pole, and all slot inside two is located at the same magnetic pole.

[0011] For any of the winding units, the slot interior of the j-th coil is connected to the slot interior of the (j+2)-th coil via a first connection portion. The first connection portion includes at least one second slot interior located in the same layer of the stator core as the first slot interior of the (j+1)-th coil, where j is an integer greater than or equal to 1 and less than or equal to N-2.

[0012] The slot interior one, the slot interior two, and the slot interior two of the j+1 coil are arranged sequentially along the circumference of the stator core at different magnetic poles.

[0013] As one possible implementation of the above-mentioned motor stator, for any of the winding units, one end of the second coil is connected to a second connection portion, and the second connection portion includes at least one third slot located in the same layer as the first slot of the first coil in the stator core.

[0014] For any of the winding units, the slot interior one of the first coil, the slot interior third coil, and the slot interior second coil of the first coil are arranged sequentially along the circumference of the stator core and belong to different magnetic poles of the motor stator.

[0015] The two winding units of each phase winding are arranged in parallel, or the two winding units of each phase winding are arranged in series, and for any phase winding, the slot of the first coil in one winding unit is connected to the slot of the third winding unit in the other winding unit away from the end of the second coil through a series connection.

[0016] As one possible implementation of the above-mentioned motor stator, for any of the winding units, the slot interior of the (N-1)th coil and the slot interior of the Nth coil are connected by a third connecting part. The third connecting part includes at least one fourth slot interior located in the same layer of the stator core as the first slot interior of the Nth coil. The slot interior of the Nth coil, the fourth slot interior, and the slot interior of the Nth coil are arranged sequentially along the circumference of the stator core and belong to different magnetic poles of the motor stator.

[0017] As one possible implementation of the above-mentioned motor stator, the multiple slots inside each coil are arranged alternately along the circumference of the stator core with a first span and a second span, wherein the first span is greater than the second span.

[0018] As one possible implementation of the above-mentioned motor stator, in the two winding units of the same phase winding, along the extension direction of any winding unit, the two slots with a span of the first span in any winding unit are arranged between the two slots of the other winding unit with a span of the second span.

[0019] As one possible implementation of the above-mentioned motor stator, all slots distributed in the same slot of the stator core belong to the same phase winding;

[0020] The two winding units of each phase winding are connected in parallel, and the slots of each winding unit that are arranged in the same magnetic pole are arranged in the same slot of the stator core; or,

[0021] The two winding units of each phase winding are connected in series. In each winding unit, the slots located in the same magnetic pole are arranged in the same slot of the stator core. The slots located in the k1 layer and the k1+2 layer are located in the same slot of the stator core. The slots located in the k1+1 layer and the k1 layer are located in two adjacent slots of the stator core. 1≤k1≤N-3.

[0022] As one possible implementation of the above-mentioned motor stator, the slots on the stator core include a first type of slots and a second type of slots arranged alternately along the circumference of the stator core. All slots distributed in the same first type of slot belong to the same phase winding. The slots distributed in the first layer to the N / 2 layer of the second type of slots belong to one phase winding. The slots distributed in the N / 2+1 layer to the N layer of the second type of slots belong to another phase winding.

[0023] The two winding units of each phase winding are connected in parallel. Within each winding unit, slots located on the same magnetic pole are adjacent to each other, with the slots located in layers 1 to N / 2 being adjacent to those in layers N / 2+1 to N.

[0024] Two winding units of each phase winding are connected in series. Within each winding unit, the windings are arranged in slots on the same magnetic pole and in layers 1 to N / 2. The slots in layers k2 and k2+2 are located in the same slot of the stator core, and the slots in layers k2+1 and k2 are located in two adjacent slots of the stator core, where 1 ≤ k2 ≤ N / 2 - 2. Similarly, within each winding unit, the windings are arranged in slots on the same magnetic pole and in layers N / 2+1 to N. The slots in layers k3 and k3+2 are located in... In the same slot of the stator core, the slots located in the k3+1 layer and the k3 layer are located in two adjacent slots of the stator core, where N / 2≤k3≤N-2; one of the winding units of each phase winding is arranged in the slot of the same magnetic pole, the slots located in the N / 2 layer and the slots located in the N / 2+1 layer are arranged in two adjacent slots, and the other winding unit of each phase winding is arranged in the slot of the same magnetic pole, with a slot between the slot located in the N / 2 layer and the slot located in the N / 2+1 layer.

[0025] To achieve the above objectives, the present invention also provides an electric motor, including the motor stator provided in any of the above-described embodiments.

[0026] The beneficial effects of this utility model are as follows: The motor stator and motor provided by this utility model include a first conductor and a second conductor that do not cross each other and are connected, and each winding unit includes N coils. The N coils include a first coil, a second coil, ..., an Nth coil that are sequentially nested along the radial direction of the stator core. Along the radial direction of the stator core, the first coil, the third coil, ..., the N-3rd coil, and the N-1st coil are sequentially connected to form the first conductor, and the second coil, the fourth coil, ..., the N-2nd coil, and the Nth coil are sequentially connected to form the second conductor. This simplifies the forming process of the stator winding, improves the winding efficiency of the stator winding, and reduces costs during the motor manufacturing process.

[0027] Each winding unit consists of two non-crossing but connected conductors, reducing the number of conductors, using less material, lowering costs, and reducing the number of solder joints in the stator winding, thus reducing the space occupied at the axial end of the stator winding. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the winding of one of the winding units of the first type of phase winding (parallel connection of the same phase) provided in this embodiment of the utility model;

[0029] Figure 2 This is a winding diagram of another winding unit of the first phase winding (parallel connection of the same phase) provided in the embodiment of this utility model;

[0030] Figure 3 This is a winding diagram of the first type of phase winding (parallel connection of the same phase) provided in this embodiment of the utility model;

[0031] Figure 4 This is a winding diagram of the second type of phase winding (parallel connection of the same phase) provided in this embodiment of the utility model;

[0032] Figure 5 This is a schematic diagram of the winding of one of the winding units of the third type of phase winding (parallel connection of opposite phases) provided in this embodiment of the utility model;

[0033] Figure 6 This is a winding diagram of another winding unit of the third type of phase winding (parallel connection of opposite phases) provided in this embodiment of the utility model;

[0034] Figure 7 This is a winding diagram of the third type of phase winding (parallel connection of opposite phases) provided in this embodiment of the utility model;

[0035] Figure 8 This is a winding diagram of the fourth type of phase winding (parallel connection of opposite phases) provided in this embodiment of the utility model;

[0036] Figure 9 This is a schematic diagram of the winding of one of the winding units of the fifth type of phase winding (in series in phase) provided in this embodiment of the present utility model;

[0037] Figure 10 This is a winding diagram of another winding unit of the fifth type of phase winding (in series in the same phase) provided in this embodiment of the utility model;

[0038] Figure 11 This is a winding diagram of the fifth type of phase winding (in series in the same phase) provided in this embodiment of the utility model;

[0039] Figure 12 This is a schematic diagram of the winding of one of the winding units of the sixth phase winding (different phases connected in series) provided in this embodiment of the utility model;

[0040] Figure 13 This is a winding diagram of another winding unit of the sixth phase winding (different phases connected in series) provided in this embodiment of the utility model;

[0041] Figure 14 This is a winding diagram of the sixth type of phase winding (different phases connected in series) provided in this embodiment of the utility model.

[0042] In the picture:

[0043] 1. Winding unit; 11. Conductor; 111. First conductor; 112. Second conductor; 121. First coil; 122. Second coil; 123. Third coil; 124. Fourth coil; 125. Fifth coil; 126. Sixth coil;

[0044] 1271. Inside the first trough; 1272. Inside the second trough;

[0045] 3. First connecting part; 31. Inside the second groove; 4. Second connecting part; 41. Inside the third groove; 5. Third connecting part; 51. Inside the fourth groove; 6. Series connecting part;

[0046] 100. Phase winding. Detailed Implementation

[0047] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0048] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0049] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0050] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0051] like Figures 1 to 11 As shown, an embodiment of the present invention provides a motor stator, including a stator core and a stator winding having a plurality of phase windings 100. Each phase winding 100 includes at least one winding unit 1, and each winding unit 1 includes a first conductor 111 and a second conductor 112 that do not cross each other and are connected.

[0052] Each winding unit 1 includes N coils. The N coils include a first coil 121, a second coil 122, ..., an Nth coil, which are sequentially wound along the radial direction of the stator core. N is an even number greater than or equal to 4. Along the radial direction of the stator core, the first coil 121, the third coil 123, ..., the (N-3)th coil, and the (N-1)th coil are sequentially connected to form a first conductor 111. The second coil 122, the fourth coil 124, ..., the (N-2)th coil, and the Nth coil are sequentially connected to form a second conductor 112.

[0053] By using the winding unit 1 formed by the first conductor 111 and the second conductor 112 that do not cross each other but are connected, the stator winding forming process can be simplified, the winding efficiency of the stator winding can be improved, and the cost can be reduced during the manufacturing process of the motor.

[0054] Each winding unit 1 includes two non-crossing but connected conductors 11, which reduces the number of conductors 11, uses less material, and has a lower cost. It also reduces the number of solder joints in the stator winding and reduces the space occupied at the axial end of the stator winding.

[0055] For the stator winding provided in this embodiment of the present invention, the number of slots per pole per phase of the stator winding is 2, and each phase winding 100 includes two winding units 1. The two winding units 1 of each phase winding 100 can be connected in parallel or in series. Figures 1 to 8 In the illustrated embodiment, two winding units 1 of the same phase winding 100 can be connected in parallel; such as Figures 9 to 14 In the embodiment shown, the two winding units 1 of the same phase winding 100 can also be connected in parallel.

[0056] For example, such as Figures 1 to 3 The illustrated embodiments, such as Figures 5 to 7 The embodiments shown, and as Figures 9 to 11In the embodiment shown, each winding unit 1 includes six coils, namely a first coil 121, a second coil 122, a third coil 123, a fourth coil 124, a fifth coil 125, and a sixth coil 126.

[0057] For example, such as Figure 4 In the embodiments shown in Figure 1 and Figure 8, each winding unit 1 includes twelve coils.

[0058] Figure 1 and Figure 2 In the illustrated embodiment, the solid line represents the first conductor 111, and the dashed line represents the second conductor 112. Figure 5 and Figure 6 In the illustrated embodiment, the solid line represents the first conductor 111, and the dashed line represents the second conductor 112. Figure 9 and Figure 10 In the illustrated embodiment, the solid line represents the first conductor 111, and the dashed line represents the second conductor 112. Figure 12 and Figure 13 In the illustrated embodiment, the solid line represents the first conductor 111, and the dashed line represents the second conductor 112.

[0059] In some embodiments, in any winding unit 1, the first conductor 111 and the second conductor 112, the interior of the multiple slots of each conductor 11 includes the interior of the multiple first slots forming N / 2 coils, the multiple first slots of the same coil are located in the same layer of the stator core, and the first slots belonging to the same conductor 11 and belonging to different coils are located in different layers of the stator core.

[0060] Specifically, the stator core has multiple slots arranged circumferentially, and each slot contains N slots arranged sequentially from the inside to the outside along the radial direction of the stator core. That is, the multiple slots in the same slot are arranged in N layers along the radial direction of the stator core.

[0061] For example, such as Figures 1 to 3 The illustrated embodiments, such as Figures 5 to 7 The embodiments shown, and as Figures 9 to 11 In the embodiment shown, the stator core has ninety-six slots. Multiple slots within the same slot of the stator core are distributed in six layers along the radial direction of the stator core. In each winding unit 1, each coil is arranged in the same layer of the stator core, and different coils are arranged in different layers of the stator core.

[0062] For example, such as Figure 4 The embodiments shown, and as Figure 8 In the embodiment shown, the interiors of multiple slots in the same slot of the stator core are distributed in twelve layers along the radial direction of the stator core. In each winding unit 1, each coil is arranged in the same layer of the stator core, and different coils are arranged in different layers of the stator core.

[0063] In some embodiments, the number of slots per pole per phase of the stator winding is 2, and each phase winding 100 includes two winding units 1; for any coil from the first coil 121 to the Nth coil in any winding unit 1, the first slot interior at one end of each coil is slot interior one 1271, and the first slot interior at the other end is slot interior two 1272; and for any winding unit 1, all slot interior one 1271 are located at the same magnetic pole, and all slot interior two 1272 are located at the same magnetic pole.

[0064] For any winding unit 1, the slot interior 1271 of the j-th coil is connected to the slot interior 1272 of the (j+2)-th coil via a first connecting part 3. The first connecting part 3 includes at least one second slot interior 31 located in the same layer of the stator core as the first slot interior of the (j+1)-th coil, where j is an integer greater than or equal to 1 and less than or equal to N-2. The slot interior 1271, the second slot interior 31, and the slot interior 1272 of the (j+1)-th coil are arranged sequentially along the circumference of the stator core at different magnetic poles.

[0065] For example, for any winding unit 1, the first connection portion 3 includes a second slot interior 31. Along the circumference of the stator core, the slot interior 1271 of the (j+1)th coil, the second slot interior 31, and the slot interior 1272 of the (j+1)th coil are sequentially arranged on three adjacent magnetic poles. Figures 1 to 4 The illustrated embodiments Figures 5 to 8 The illustrated embodiments Figures 9 to 11 The illustrated embodiments Figures 12 to 14 In the embodiment shown, the slot interior 1271, the second slot interior 31, and the slot interior 1272 of one end of the j+1 coil are sequentially arranged on the 16th magnetic pole, the 1st magnetic pole, and the 2nd magnetic pole.

[0066] like Figure 1 and Figure 2 The illustrated embodiments, such as Figure 5 and Figure 6 The illustrated embodiments, such as Figure 9 and Figure 10 The illustrated embodiments, such as Figure 12 and Figure 13 In the embodiment shown, the first connecting part 3 is the dark blue line shown in the figure, the yellow cross-section line in the figure shows the ring inside the second groove 31, the purple cross-section in the figure shows the ring inside the first groove 1271, and the orange cross-section in the figure shows the ring inside the second groove 1272.

[0067] In some embodiments, for any winding unit 1, one end of the second coil 122 is connected to a second connection portion 4, the second connection portion 4 including at least one third slot interior 41 located in the same layer of the stator core as the first slot interior of the first coil 121; for any winding unit 1, the slot interior 1271 of the first coil 121, the third slot interior 41 and the slot interior 1272 of the second coil 122 are arranged sequentially along the circumference of the stator core and belong to different magnetic poles of the motor stator.

[0068] like Figures 1 to 8 In the illustrated embodiment, each phase winding 100 includes two winding units 1 connected in parallel. For any winding unit 1, each second connection portion 4 includes a third slot interior 41. Along the circumference of the stator core, the slot interior 1271 of the first coil 121, the third slot interior 41, and the slot interior 1272 of the second coil 122 are sequentially arranged on three adjacent magnetic poles of the motor stator. Exemplarily, the motor stator has sixteen magnetic poles distributed sequentially along the stator core, such as the slot interior 1271 of the first coil 121, the third slot interior 41, and the slot interior 1272 of the second coil 122 being sequentially arranged on the 16th magnetic pole, the 1st magnetic pole, and the 2nd magnetic pole. Figure 1 and Figure 2 The illustrated embodiments, such as Figure 5 and Figure 6 The illustrated embodiments, such as Figure 9 and Figure 10 The illustrated embodiments, such as Figure 12 and Figure 13 In the embodiment shown, the second connecting part 4 is the purple dashed line shown in the figure, and the interior 41 of the third groove is the ring shown in the green cross-section shown in the figure.

[0069] like Figures 9 to 14 In the illustrated embodiment, each phase winding 100 includes two winding units 1 connected in series. For any winding unit 1 of each phase winding 100, the second connection portion 4 includes a third slot interior 41. Along the circumference of the stator core, the slot interior 1271 of the first coil 121, the third slot interior 41, and the slot interior 1272 of the second coil 122 are sequentially arranged at three adjacent magnetic poles of the motor stator. The second connection portion 4 includes a third slot interior 41. Exemplarily, the motor stator has sixteen magnetic poles distributed sequentially along the stator core, and the slot interior 1271 of the first coil 121, the third slot interior 41, and the slot interior 1272 of the second coil 122 are sequentially arranged at the 16th magnetic pole, the 1st magnetic pole, and the 2nd magnetic pole.

[0070] For each phase winding 100 with two winding units 1 connected in series, for any phase winding 100, the slot interior 1272 of the first coil 121 in one winding unit 1 is connected to the third slot interior 41 of the second connecting part 4 in another winding unit 1 away from the end of the second coil 122 through the series connection part 6, so as to connect the two winding units 1 of the same phase winding 100 in series.

[0071] like Figure 11 The illustrated embodiments, and Figure 14 In the embodiment shown, for any phase winding 100, the multiple first slots of each coil in each winding unit 1 are sequentially arranged on the second, third, ..., 15th and 16th magnetic poles of the motor stator. The second connection portion 4 in each winding unit 1 includes a third slot interior 41. The third slot interior 41 is arranged in the first layer and located on the first magnetic pole. The series connection portion 6 connects the slot interior 1272 of the first coil 121 in one winding unit 1 with the third slot interior 41 of another winding unit 1.

[0072] In some embodiments, for any winding unit 1, the slot interior 1271 of the (N-1)th coil and the slot interior 1271 of the Nth coil are connected by a third connecting part 5. The third connecting part 5 includes at least one fourth slot interior 51 located in the same layer of the stator core as the first slot interior of the Nth coil. The slot interior 1271, the fourth slot interior 51, and the second slot interior 1272 of the Nth coil are arranged sequentially along the circumference of the stator core and belong to different magnetic poles of the motor stator, so as to connect the first conductor 111 and the second conductor 112 of the same winding unit 1.

[0073] like Figures 1 to 8 In the illustrated embodiment, each phase winding 100 includes two winding units 1 connected in parallel, and the third connection portion 5 includes a fourth slot interior 51. For example... Figures 9 to 14 In the embodiment shown, each phase winding 100 includes two winding units 1 connected in series, and the third connection portion 5 includes a fourth slot interior 51.

[0074] like Figure 1 and Figure 2 The illustrated embodiments, such as Figure 5 and Figure 6 The illustrated embodiments, such as Figure 9 and Figure 10 The illustrated embodiments, such as Figure 12 and Figure 13 In the embodiment shown, the third connecting part 5 is the green line shown in the figure.

[0075] In some embodiments, all slots within the same slot of the stator core belong to the same phase winding 100. See [link / reference] Figures 1 to 4The illustrated embodiments, and Figures 9 to 11 The example shown.

[0076] for Figures 1 to 4 In the embodiment shown, for the phase winding 100 with two winding units 1 connected in parallel, the slots in each winding unit 1 that are arranged at the same magnetic pole are arranged in the same slot of the stator core. See [link to previous document]. Figure 1 and Figure 2 The winding unit 1 shown.

[0077] for Figures 9 to 11 In the illustrated embodiment, for a phase winding 100 consisting of two winding units 1 connected in series, the slots in each winding unit 1 arranged in the same magnetic pole are located within the same slot of the stator core. The slots located in the k1th and k1+2th layers are located within the same slot of the stator core, and the slots located in the k1+1th and k1th layers are located within two adjacent slots of the stator core, where 1 ≤ k1 ≤ N-3. Figure 9 Taking the winding unit 1 shown as an example, for the slot arranged in the first magnetic pole, the slots arranged in the first layer, the third layer, and the fifth layer are located in the same slot, and the slots arranged in the second layer, the fourth layer, and the sixth layer are located in the same slot. These two slots are arranged adjacent to each other.

[0078] In other embodiments, the slots on the stator core include first-type slots and second-type slots arranged alternately along the circumference of the stator core. All slots within the same first-type slot belong to the same phase winding 100. Slots in the first to N / 2 layers of the second-type slots belong to one phase winding 100, and slots in the N / 2+1 to N layers of the second-type slots belong to another phase winding 100. See also Figures 5 to 8 The illustrated embodiments, and Figures 12 to 14 The example shown.

[0079] like Figures 5 to 8 In the illustrated embodiment, for a phase winding 100 with two winding units 1 connected in parallel, the slots located in the same magnetic pole within each winding unit 1 are adjacent to the slots located in the first to N / 2 layers and the slots located in the N / 2+1 to N layers. Figure 5 Taking the winding unit 1 shown as an example, for the slot arranged in the first magnetic pole, the slots in the first layer, the second layer, and the third layer are located in the same slot, and the slots in the fourth layer, the fifth layer, and the sixth layer are located in the same slot. These two slots are arranged adjacent to each other.

[0080] for Figures 12 to 14In the illustrated embodiment, for a phase winding 100 consisting of two winding units 1 connected in series, each winding unit 1 has slots located at the same magnetic pole and within the slots of layers 1 to N / 2. The slots located in layers k2 and k2+2 are located within the same slot of the stator core, and the slots located in layers k2+1 and k2 are located within two adjacent slots of the stator core, where 1 ≤ k2 ≤ N / 2 - 2. Similarly, each winding unit 1 has slots located at the same magnetic pole and within the slots of layers N / 2+1 to N. The slots located in layers k3 and k3+2 are located within... In the same slot of the stator core, the slots located in the k3+1 layer and the k3 layer are located in two adjacent slots of the stator core, N / 2≤k3≤N-2; one winding unit 1 of each phase winding 100 is arranged in the slot of the same magnetic pole, the slots located in the N / 2 layer and the slots located in the N / 2+1 layer are arranged in two adjacent slots, and the other winding unit 1 of each phase winding 100 is arranged in the slot of the same magnetic pole, with a slot between the slot located in the N / 2 layer and the slot located in the N / 2+1 layer.

[0081] Figure 12 The diagram shows a winding unit 1 of a phase winding 100. For the slots arranged in the first magnetic pole, the slots in the first and third layers are located in the same slot, and this slot is adjacent to the slot in the second layer. The slots in the fourth and sixth layers are located in the same slot, and this slot is adjacent to the slot in the fifth layer. There is a slot gap between the slot in the fourth layer and the slot in the third layer, and the slot in the second layer is adjacent to the slot in the fifth layer.

[0082] Figure 13 The diagram shows another winding unit 1 of another phase winding 100. For the slots arranged in the first magnetic pole, the slots in the first and third layers are located in the same slot, and this slot is adjacent to the slot in the second layer. The slots in the fourth and sixth layers are located in the same slot, and this slot is adjacent to the slot in the fifth layer. The slots in the fourth and third layers are arranged in the same slot, and the slots in the second and fifth layers are separated by one slot.

[0083] In some embodiments, the multiple slots inside each coil are arranged along the circumference of the stator core with alternating first and second spans, the first span being greater than the second span. This arrangement allows each coil to be wound in a non-crossing manner.

[0084] For example, such as Figures 1 to 3In the embodiment shown, the first span - the second span = 2, the first span is the pole pitch of the stator winding + 1, and the second span is the pole pitch of the stator winding - 1.

[0085] In some embodiments, taking the number of slots per pole per phase of the stator winding as 2 and each phase winding 100 as including two winding units 1 as an example, in the two winding units 1 of the same phase winding 100, along the extension direction of any winding unit 1, the two slots with a span of the first span in any winding unit 1 are arranged between the two slots of the other winding unit 1 with a span of the second span.

[0086] This configuration allows each winding unit 1 to be wound in a non-crossing manner, and facilitates the parallel or series connection of two winding units 1 to form a phase winding 100.

[0087] An embodiment of this utility model also provides an electric motor, which includes the motor stator described above. This motor has the same technical effects as the motor stator described above, and will not be repeated here.

[0088] like Figures 1 to 4 The illustrated embodiments, such as Figures 5 to 8 In the embodiment shown, each phase winding 100 includes two parallel winding units 1, each winding unit 1 being formed by winding two conductors 11. For a stator winding with two slots per pole per phase and each phase winding 100 including two winding units 1, each stator winding is formed by winding 12 wires, which can significantly reduce the number of welding points of the stator winding.

[0089] like Figures 9 to 11 The illustrated embodiments, and Figures 12 to 14 In the embodiment shown, each phase winding 100 includes two winding units 1 connected in series. Each winding unit 1 is formed by winding two conductors. For a stator winding with two slots per pole per phase and each phase winding 100 including two winding units 1, each stator winding is formed by winding 12 wires, which can significantly reduce the number of welding points of the stator winding.

[0090] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An electric machine stator comprising a stator core having a plurality of slots arranged at intervals along a self-circumferential direction, and a stator winding having a plurality of phase windings (100), characterized by, Each of the phase windings (100) includes at least one winding unit (1), and each winding unit (1) includes a first conductor (111) and a second conductor (112) that do not cross each other and are connected. Each winding unit (1) includes N coils, the N coils including a first coil (121), a second coil (122), ..., an Nth coil arranged in sequence along the radial direction of the stator core, where N is an even number greater than or equal to 4. Along the radial direction of the stator core, the first coil (121), the third coil (123), ..., the N-3rd coil, and the N-1st coil are connected in sequence to form the first conductor (111), and the second coil (122), the fourth coil (124), ..., the N-2nd coil, and the Nth coil are connected in sequence to form the second conductor (112).

2. The motor stator of claim 1, wherein, The number of slots per pole per phase of the stator winding is 2, and each phase winding (100) includes two winding units (1); in the first conductor (111) and the second conductor (112) of any winding unit (1), the interior of the multiple slots of each conductor (11) includes the interior of multiple first slots forming N / 2 coils, the interior of multiple first slots of the same coil is located in the same layer of the stator core, and the interior of first slots belonging to the same conductor (11) and belonging to different coils is located in different layers of the stator core.

3. The motor stator of claim 2, wherein, For any coil from the first coil (121) to the Nth coil in any winding unit (1), the first slot at one end of each coil is slot interior one (1271), and the first slot at the other end is slot interior two (1272); and for any winding unit (1), all slot interior one (1271) are located at the same magnetic pole, and all slot interior two (1272) are located at the same magnetic pole; For any of the winding units (1), the slot interior one (1271) of the j-th coil is connected to the slot interior two (1272) of the j+2-th coil through the first connecting part (3), the first connecting part (3) includes at least one second slot interior (31) located in the same layer of the stator core as the first slot interior of the j+1-th coil, where j is an integer greater than or equal to 1 and less than or equal to N-2; The slot interior one (1271), the slot interior (31), and the slot interior two (1272) of the j+1 coil are arranged sequentially along the circumference of the stator core at different magnetic poles.

4. The motor stator of claim 3, wherein, For any of the winding units (1), one end of the second coil (122) is connected to a second connection part (4), the second connection part (4) includes at least one third slot (41) located in the same layer as the first slot of the first coil (121) in the stator core; For any of the winding units (1), the slot interior one (1271), the slot interior three (41), and the slot interior two (1272) of the first coil (121) are arranged sequentially along the circumference of the stator core and belong to different magnetic poles of the motor stator. The two winding units (1) of each phase winding (100) are arranged in parallel, or the two winding units (1) of each phase winding (100) are arranged in series, and for any phase winding (100), the slot interior (1272) of the first coil (121) in one of the winding units (1) is connected to the third slot interior (41) of the second connection part (4) of the other winding unit (1) away from the second coil (122) through a series connection part (6).

5. The motor stator of claim 4, wherein, For any of the winding units (1), the slot interior one (1271) of the N-1 coil and the slot interior one (1271) of the N coil are connected by a third connecting part (5). The third connecting part (5) includes at least one fourth slot interior (51) located in the same layer of the stator core as the first slot interior of the N coil. The slot interior one (1271), the fourth slot interior (51), and the slot interior two (1272) of the N coil are arranged sequentially along the circumference of the stator core and belong to different magnetic poles of the motor stator.

6. An electrical machine stator according to any one of claims 2 to 5, characterised in that, The multiple slots inside each coil are arranged along the circumference of the stator core with alternating first and second spans, the first span being greater than the second span.

7. The motor stator of claim 6, wherein, In the two winding units (1) of the same phase winding (100), along the extension direction of any winding unit (1), the two slots with a span of the first span in any winding unit (1) are arranged between the two slots with a span of the second span in the other winding unit (1).

8. An electrical machine stator according to any one of claims 2 to 5, characterised in that, All slots distributed within the same slot of the stator core belong to the same phase winding (100); The two winding units (1) of each phase winding (100) are connected in parallel, and the slots of each winding unit (1) arranged in the same magnetic pole are arranged in the same slot of the stator core; or, The two winding units (1) of each phase winding (100) are connected in series. In each winding unit (1), the slots located in the same magnetic pole are arranged in the same slot of the stator core, and the slots located in the k1+1 and k1+2 layers are located in the same slot of the stator core. 1≤k1≤N-3.

9. An electrical machine stator according to any one of claims 2 to 5, characterised in that, The slots on the stator core include a first type of slots and a second type of slots arranged alternately along the circumference of the stator core. All slots distributed in the same first type of slot belong to the same phase winding (100). The slots distributed in the first layer to the N / 2 layer of the second type of slots belong to one phase winding (100). The slots distributed in the N / 2+1 layer to the Nth layer of the second type of slots belong to another phase winding (100). Each phase winding (100) has two winding units (1) connected in parallel. In each winding unit (1), the slots located in the same magnetic pole are adjacent to the slots located in the first to N / 2 layers and the slots located in the N / 2+1 to N layers; or, Two winding units (1) of each phase winding (100) are connected in series. Each winding unit (1) is arranged in slots on the same magnetic pole and in layers 1 to N / 2. Slots in layers k2 and k2+2 are located in the same slot of the stator core, and slots in layers k2+1 and k2 are located in adjacent slots of the stator core, where 1 ≤ k2 ≤ N / 2 - 2. Each winding unit (1) is arranged in slots on the same magnetic pole and in layers N / 2+1 to N. Slots in layers k3 and k3+2 are located in adjacent slots of the stator core. In the same slot of the stator core, the slots located in the k3+1 layer and the k3 layer are located in two adjacent slots of the stator core, N / 2≤k3≤N-2; one of the winding units (1) of each phase winding (100) is arranged in the slot of the same magnetic pole, the slots located in the N / 2 layer and the slots located in the N / 2+1 layer are arranged in two adjacent slots, the other winding unit (1) of each phase winding (100) is arranged in the slot of the same magnetic pole, and there is a slot gap between the slot located in the N / 2 layer and the slot located in the N / 2+1 layer.

10. An electric machine characterized by Includes the motor stator as described in any one of claims 1 to 9.

Images