Rotating electric machine

Abstract

The present invention provides a rotating electric machine having two three-phase coils, with a winding structure designed to match the phases of phases of the same type. [Solution] The rotating electric machine 1 comprises a stator 20 configured such that a winding 30 passes through each of a plurality of slots 23 an even number of times, a first U-phase wire 31U, a first V-phase wire 31V, a first W-phase wire 31W, a second U-phase wire 32U, a second V-phase wire 32V, a second W-phase wire 32W, and a rotor 10 that rotates due to the magnetic field generated by the stator 20. The first U-phase wire 31U and the second U-phase wire 32U are wound in the same slot position, passing through the same number of times and having the same current flow direction. The first V-phase wire 31V and the second V-phase wire 32V are wound in the same slot position, passing through the same number of times and having the same current flow direction. The first W-phase wire 31W and the second W-phase wire 32W are wound in the same slot position, passing through the same number of times and having the same current flow direction.

Description

Technical Field

[0001] The present invention relates to a rotating electrical machine.

Background Art

[0002] Patent Document 1 discloses a stator structure of a polyphase motor (rotating electrical machine) having two three-phase coils.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, when windings of two same-phase windings are wound in different forms, it is normal that the positive peaks in the waveform of the induced voltage are shifted from each other.

[0005] An object of the present invention is to provide a rotating electrical machine having a winding structure designed to match the phases of the same phases in a rotating electrical machine having two three-phase coils.

Means for Solving the Problems

[0006] According to one aspect of the present invention, a rotating electric machine includes a stator configured such that a winding passes through each of a plurality of slots an even number of times, a first U-phase wire wound around the plurality of slots, a first V-phase wire wound around the plurality of slots, a first W-phase wire wound around the plurality of slots, a second U-phase wire wound around the plurality of slots, a second V-phase wire wound around the plurality of slots, a second W-phase wire wound around the plurality of slots, and the first U-phase wire, the first V-phase wire, the first W-phase wire, and the second The system includes a common rotor that rotates due to the magnetic field generated by the U-phase wire, the second V-phase wire, and the second W-phase wire, wherein the first U-phase wire and the second U-phase wire are wound in the same slot position, passing through the same number of times and with the same current flow direction, the first V-phase wire and the second V-phase wire are wound in the same slot position, passing through the same number of times and with the same current flow direction, and the first W-phase wire and the second W-phase wire are wound in the same slot position, passing through the same number of times and with the same current flow direction. [Effects of the Invention]

[0007] According to one aspect of the present invention, a rotating electric machine having two three-phase coils can be provided, which has a winding structure designed to match the phases of phases of the same type. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 is a configuration diagram showing a rotating electric machine according to an embodiment of the present invention as viewed from the side opposite the lead wire. [Figure 2] Figure 2 is a diagram showing the configuration of a rotating electric machine when the winding is a full-length winding, as viewed from the side opposite the lead wire. [Figure 3] Figure 3 is an unfolded view of the winding in Figure 2, with the side opposite the lead wire facing upwards, as seen from the outer circumference. [Figure 4] Figure 4 is a diagram showing the configuration of a rotating electric machine when the windings are short-segment windings, as viewed from the side opposite the lead wire. [Figure 5] Figure 5 is a diagram showing the winding configuration in Figure 4. [Modes for carrying out the invention]

[0009] Hereinafter, a description of a rotating electric machine 1 according to an embodiment of the present invention will be given with reference to the drawings.

[0010] First, the configuration of the rotating electric machine 1 will be explained with reference to Figures 1 to 5. Figure 1 is a configuration diagram showing the rotating electric machine 1 as viewed from the side opposite the lead wire. Figure 2 is a configuration diagram showing the rotating electric machine 1 as viewed from the side opposite the lead wire when the winding 30 is a full-section winding. Figure 3 is an exploded view of the winding 30 in Figure 2, viewed from the outer circumference with the side opposite the lead wire facing upwards. Figure 4 is a configuration diagram showing the rotating electric machine 1 as viewed from the side opposite the lead wire when the winding 30 is a short-section winding. Figure 5 is a configuration diagram of the winding 30 in Figure 4.

[0011] In Figures 1, 2, and 4, a circle with an "x" inside indicates that the winding 30 is wound from front to back, and current flows from front to back. A circle with a "●" inside indicates that the winding 30 is wound from back to front, and current flows from back to front.

[0012] As shown in Figure 1, the rotating electric machine 1 comprises a rotor 10 as a rotor and a stator 20 as a stator. Here, the rotating electric machine 1 is an electric motor having two three-phase coils (a first three-phase coil 31 and a second three-phase coil 32). The rotating electric machine 1 can be used for both an electric motor that generates driving force when mounted on a vehicle, for example, and a generator that generates regenerative power when driven. Hereafter, the direction of the central axis of the rotating electric machine 1 will be referred to as the "axial direction," the direction of rotation of the rotor 10 in the rotating electric machine 1 will be referred to as the "circumferential direction," and the direction extending radially from the central axis of the rotating electric machine 1 will be referred to as the "radial direction."

[0013] The rotor 10 includes a rotor core 11, a rotor shaft 12, and a plurality of permanent magnets 13. The rotor 10 is a common rotor that rotates due to the magnetic fields generated by the first U phase line 31U, the first V phase line 31V, the first W phase line 31W, the second U phase line 32U, the second V phase line 32V, and the second W phase line 32W, which will be described later.

[0014] The rotor core 11 is formed in a substantially cylindrical shape extending in the axial direction. The rotor core 11 has a through hole penetrating in the axial direction. A rotor shaft 12 is provided in the through hole. The rotor core 11 is rotatably supported by the rotor shaft 12.

[0015] A plurality of permanent magnets 13 are accommodated in the rotor core 11. Here, four sets (eight) of permanent magnets 13 are provided corresponding to four poles, but the number is not limited to this.

[0016] The stator 20 is a four-pole stator. The stator 20 includes a stator core 21 and a winding 30. The stator 20 is formed by winding the first U-phase line 31U, the first V-phase line 31V, the first W-phase line 31W, the second U-phase line 3 / U, the second V-phase line 32V, and the second W-phase line 32W, which will be described later, around the stator core 21.

[0017] The stator core 21 is formed in a substantially cylindrical shape extending in the axial direction. The stator core 21 is provided with a through hole penetrating in the axial direction. The rotor 10 is disposed in the through hole so as to be relatively rotatable. The stator core 21 has a plurality (here, 24) of teeth 22 and a plurality (here, 24) of slots 23.

[0018] The teeth 22 project radially inward from the inner peripheral surface of the stator core 21. The plurality of teeth 22 are arranged at equal intervals in the circumferential direction on the inner peripheral surface of the stator core 21.

[0019] The slots 23 are respectively formed between a pair of adjacent teeth 22 in the circumferential direction. The slots 23 open to the through hole of the stator core 21. The plurality of slots 23 are arranged at equal intervals in the circumferential direction on the inner peripheral surface of the stator core .

[0020] Specifically, the slots 23 include a first slot 23a, a second slot 23b, a third slot 23c, a fourth slot 23d, a fifth slot 23e, a sixth slot 23f, a seventh slot 23g, an eighth slot 23h, a ninth slot 23i, a tenth slot 23j, an eleventh slot 23k, a twelfth slot 23l, a thirteenth slot 23m, a fourteenth slot 23n, a fifteenth slot 23o, a sixteenth slot 23p, a seventeenth slot 23q, an eighteenth slot 23r, a nineteenth slot 23s, a twentieth slot 23t, a twenty - first slot 23u, a twenty - second slot 23v, a twenty - third slot 23w, and a twenty - fourth slot 23x. The first to twenty - fourth slots 23a to 23x are provided in order so as to be adjacent in the circumferential direction, and the twenty - fourth slot 23x and the first slot 23a are adjacent in the circumferential direction, whereby they are arranged at equal intervals over the entire circumference. The plurality of slots 23 are each configured such that the winding 30 passes through an even number of times.

[0021] Here, the stator 20 is configured such that the winding 30 passes through each of the plurality of slots 23 four times. Thereby, it is possible to aim at improving the productivity by minimizing the number of winding turns. That is, one aspect of the present invention particularly preferably acts in such a case and makes it easier to equalize the number of passes of the winding 30 through each slot 23.

[0022] The winding 30 includes a first three - phase coil 31 and a second three - phase coil 32. That is, the rotating electric machine 1 is a polyphase motor having a double three - phase winding with two three - phase coils (the first three - phase coil 31 and the second three - phase coil 32) wound around a single stator 20.

[0023] The first three - phase coil 31 includes a first U - phase line 31U, a first V - phase line 31V, and a first W - phase line 31W. The first three - phase coil 31 constitutes a three - phase four - pole coil. The second three - phase coil 32 includes a second U - phase line 32U, a second V - phase line 32V, and a second W - phase line 32W. The second three - phase coil 32 constitutes a three - phase four - pole coil. The first U - phase line 31U, the first V - phase line 31V, the first W - phase line 31W, the second U - phase line 32U, the second V - phase line 32V, and the second W - phase line 32W are electrically independent of each other.

[0024] Next, with reference to Figures 1 to 3, we will explain the case where the winding 30 is wound throughout. Note that Figures 2 and 3 only show the first three-phase coil 31, and the second three-phase coil 32 is omitted from the illustration as it is similar to the first three-phase coil 31.

[0025] As shown in Figures 1 and 3, the first U-phase wire 31U is wound around a plurality of slots 23. The first U-phase wire 31U has a pair of first windings 31U1, a pair of second windings 31U2, a pair of third windings 31U3, and a pair of fourth windings 31U4. The first windings 31U1, 2nd windings 31U2, 3rd windings 31U3, and 4th windings 31U4 are each wound twice around the same slot 23.

[0026] The first winding 31U1 is constructed by winding 30, which is input from a first U-phase lead wire (not shown) connected to a three-phase AC power supply (not shown), and winding it between the first slot 23a and the seventh slot 23g. The second winding 31U2 is constructed by winding it between the second slot 23b and the eighth slot 23h, continuing from the first winding 31U1 wound in the seventh slot 23g.

[0027] The third winding 31U3 is constructed by winding it between the 13th slot 23m and the 19th slot 23s, continuing from the second winding 31U2 which is wound in the 8th slot 23h. The fourth winding 31U4 is constructed by winding it between the 14th slot 23n and the 20th slot 23t, continuing from the third winding 31U3 which is wound in the 19th slot 23s.

[0028] Thus, the first U-phase wire 31U includes a first coil 31UA which is wound between the first slot 23a and the seventh slot 23g, and then between the second slot 23b and the eighth slot 23h, and a second coil 31UB which is wound between the thirteenth slot 23m and the nineteenth slot 23s, and then between the fourteenth slot 23n and the twentyth slot 23t.

[0029] The first V-phase wire 31V has a pair of first windings 31V1, a pair of second windings 31V2, a pair of third windings 31V3, and a pair of fourth windings 31V4. The first windings 31V1, 2nd windings 31V2, 3rd windings 31V3, and 4th windings 31V4 are each wound twice around the same slot 23.

[0030] The first winding 31V1 is constructed by winding 30, which is input from the first V-phase lead wire (not shown) connected to the three-phase AC power supply, and winding it between the fifth slot 23e and the eleventh slot 23k. The second winding 31V2 is constructed by winding it between the sixth slot 23f and the twelfth slot 23l, continuing from the first winding 31V1 wound in the eleventh slot 23k.

[0031] The third winding 31V3 is constructed by winding it between the 17th slot 23q and the 23rd slot 23w, continuing from the second winding 31V2 which is wound around the 12th slot 23l. The fourth winding 31V4 is constructed by winding it between the 18th slot 23r and the 24th slot 24x, continuing from the third winding 31V3 which is wound around the 23rd slot 23w.

[0032] Thus, the first V-phase wire 31V includes a first coil 31VA which is wound between the fifth slot 23e and the eleventh slot 23k, and then between the sixth slot 23f and the twelfth slot 23l, and a second coil 31VB which is wound between the seventeenth slot 23q and the twenty-third slot 23w, and then between the eighteenth slot 23r and the twenty-fourth slot 23x.

[0033] The first W phase wire 31W has a pair of first windings 31W1, a pair of second windings 31W2, a pair of third windings 31W3, and a pair of fourth windings 31W4. The first windings 31W1, 2nd windings 31W2, 3rd windings 31W3, and 4th windings 31W4 are each wound twice around the same slot 23.

[0034] The first winding 31W1 is constructed by winding 30, which is input from the first W phase lead wire (not shown) connected to the three-phase AC power supply, and winding it between the 9th slot 23i and the 15th slot 23o. The second winding 31W2 is constructed by winding it between the 10th slot 23j and the 16th slot 23p, continuing from the first winding 31W1 which is wound in the 15th slot 23o.

[0035] The third winding 31W3 is constructed by winding it between the 21st slot 23u and the 3rd slot 23c, continuing from the second winding 31W2 which is wound around the 16th slot 23p. The fourth winding 31W4 is constructed by winding it between the 22nd slot 23v and the 4th slot 24d, continuing from the third winding 31W3 which is wound around the 3rd slot 23c.

[0036] Thus, the first W phase wire 31W includes a first coil 31WA which is wound between the 9th slot 23i and the 15th slot 23o, and then between the 10th slot 23j and the 16th slot 23p, and a second coil 31WB which is wound between the 21st slot 23u and the 3rd slot 23c, and then between the 22nd slot 23v and the 4th slot 23d.

[0037] The second U-phase wire 32U is wound around multiple slots 23. The second U-phase wire 32U passes through the same slots 23 as the first U-phase wire 31U the same number of times, and is wound so that the direction of current flow is the same; therefore, a detailed explanation is omitted here.

[0038] The second V-phase wire 32V is wound around multiple slots 23. The second V-phase wire 32V passes through the same slots 23 as the first V-phase wire 31V the same number of times, and is wound so that the direction of current flow is the same; therefore, a detailed explanation is omitted here.

[0039] The second W phase wire 32W is wound around multiple slots 23. The second W phase wire 32W passes through the same slots 23 as the first W phase wire 31W the same number of times, and is wound so that the direction of current flow is the same; therefore, a detailed explanation is omitted here.

[0040] As shown in Figure 2, the first U-phase wire 31U, the first V-phase wire 31V, the first W-phase wire 31W, the second U-phase wire 32U, the second V-phase wire 32V, and the second W-phase wire 32W are all constructed as full-section windings with a magnetic pole pitch equal to the coil pitch.

[0041] Next, with reference to Figures 1, 4, and 5, we will explain the case where the winding 30 is a short-winding type. Figures 4 and 5 show only the first three-phase coil 31, and the second three-phase coil 32 is omitted from the illustration because it is similar to the first three-phase coil 31.

[0042] As shown in Figures 1 and 5, the first U-phase wire 31U is wound around a plurality of slots 23. The first U-phase wire 31U has a pair of first windings 31U1, a pair of second windings 31U2, a pair of third windings 31U3, and a pair of fourth windings 31U4. The first windings 31U1, 2nd windings 31U2, 3rd windings 31U3, and 4th windings 31U4 are each wound around the same slot 23 twice.

[0043] The first winding 31U1 is constructed by winding 30, which is input from a first U-phase lead wire (not shown) connected to a three-phase AC power supply (not shown), and winding it between the first slot 23a and the 20th slot 23t. The second winding 31U2 is constructed by winding it between the 14th slot 23n and the 19th slot 23s, continuing from the first winding 31U1 wound in the 20th slot 23t.

[0044] The third winding 31U3 is constructed by winding it between the 13th slot 23m and the 8th slot 23h, continuing from the second winding 31U2 which is wound in the 19th slot 23s. The fourth winding 31U4 is constructed by winding it between the 2nd slot 23b and the 7th slot 23g, continuing from the third winding 31U3 which is wound in the 8th slot 23h.

[0045] Thus, the first U-phase wire 31U includes a first coil 31UA that is wound between the first slot 23a and the 20th slot 23t, and then between the 14th slot 23n and the 19th slot 23s, and a second coil 31UB that is wound between the 13th slot 23m and the 8th slot 23h, and then between the 2nd slot 23b and the 7th slot 23g.

[0046] The first V-phase wire 31V has a pair of first windings 31V1, a pair of second windings 31V2, a pair of third windings 31V3, and a pair of fourth windings 31V4. The first windings 31V1, 2nd windings 31V2, 3rd windings 31V3, and 4th windings 31V4 are each wound twice around the same slot 23.

[0047] The first winding 31V1 is constructed by winding 30, which is input from the first V-phase lead wire (not shown) connected to the three-phase AC power supply, between the 21st slot 23u and the 16th slot 23p. The second winding 31V2 is constructed by continuing from the first winding 31V1 wound in the 16th slot 23p, and winding between the 10th slot 23j and the 15th slot 23o.

[0048] The third winding 31V3 is constructed by winding it between the 9th slot 23i and the 4th slot 23d, continuing from the second winding 31V2 which is wound around the 15th slot 23o. The fourth winding 31V4 is constructed by winding it between the 22nd slot 23v and the 3rd slot 24c, continuing from the third winding 31V3 which is wound around the 4th slot 23d.

[0049] Thus, the first V-phase wire 31V includes a first coil 31VA which is wound between the 21st slot 23u and the 16th slot 23p, and then between the 10th slot 23j and the 15th slot 23o, and a second coil 31VB which is wound between the 9th slot 23i and the 4th slot 23d, and then between the 22nd slot 23v and the 3rd slot 23c.

[0050] The first W phase wire 31W has a pair of first windings 31W1, a pair of second windings 31W2, a pair of third windings 31W3, and a pair of fourth windings 31W4. The first windings 31W1, 2nd windings 31W2, 3rd windings 31W3, and 4th windings 31W4 are each wound twice around the same slot 23.

[0051] The first winding 31W1 is constructed by winding 30, which is input from the first W phase lead wire (not shown) connected to the three-phase AC power supply, and winding it between the 17th slot 23q and the 12th slot 23l. The second winding 31W2 is constructed by winding it between the 6th slot 23f and the 11th slot 23k, continuing from the first winding 31W1 which is wound in the 12th slot 23l.

[0052] The third winding 31W3 is constructed by winding it between the fifth slot 23e and the 24th slot 23x, continuing from the second winding 31W2 which is wound around the 11th slot 23k. The fourth winding 31W4 is constructed by winding it between the 18th slot 23r and the 23rd slot 24w, continuing from the third winding 31W3 which is wound around the 24th slot 23x.

[0053] Thus, the first W phase wire 31W includes a first coil 31WA which is wound between the 17th slot 23q and the 12th slot 23l, and then between the 6th slot 23f and the 11th slot 23k, and a second coil 31WB which is wound between the 5th slot 23e and the 24th slot 23x, and then between the 18th slot 23r and the 23rd slot 23w.

[0054] The second U-phase wire 32U is wound around multiple slots 23. The second U-phase wire 32U passes through the same slots 23 as the first U-phase wire 31U the same number of times, and is wound so that the direction of current flow is the same; therefore, a detailed explanation is omitted here.

[0055] The second V-phase wire 32V is wound around multiple slots 23. The second V-phase wire 32V passes through the same slots 23 as the first V-phase wire 31V the same number of times, and is wound so that the direction of current flow is the same; therefore, a detailed explanation is omitted here.

[0056] The second W phase wire 32W is wound around multiple slots 23. The second W phase wire 32W passes through the same slots 23 as the first W phase wire 31W the same number of times, and is wound so that the direction of current flow is the same; therefore, a detailed explanation is omitted here.

[0057] As shown in Figure 4, the first U-phase wire 31U, the first V-phase wire 31V, the first W-phase wire 31W, the second U-phase wire 32U, the second V-phase wire 32V, and the second W-phase wire 32W are configured as short-section windings with a magnetic pole pitch different from the coil pitch. Compared to full-section windings, short-section windings, which allow for variable coil pitch settings, make it easier to equalize the number of times the winding 30 passes through each slot 23.

[0058] Next, we will explain the operation of the rotating electric machine 1.

[0059] When two windings 30 of the same phase are wound in different configurations, the positive peaks in the dielectric voltage waveform are usually offset from each other. When the positive peaks in the dielectric voltage waveform are offset from each other, precise coordinated control of the first U,V,W phase wires 31U,31V,31W and the second U,V,W phase wires 32U,32V,32W is required to rotate the rotor 10 smoothly, which increases the difficulty of the control design.

[0060] Therefore, by winding two windings 30 of the same phase in the same slot 23 with the same number of turns and current flow direction, the peaks of the two windings 30 of the same phase in the dielectric voltage waveform can be made to coincide. In other words, a design can be made in which the phases of the same phases are matched.

[0061] This reduces the difficulty of control design, for example, when the control unit for the first U,V,W phase 31U,31V,31W and the control unit for the second U,V,W phase 32U,32V,32W are different control units (control units that control the inverter circuit). Alternatively, for example, the control unit for the first U,V,W phase 31U,31V,31W and the control unit for the second U,V,W phase 32U,32V,32W can be made into a common unit, and the same signal can be supplied to control elements of the same phase (for example, IGBTs (Insulated Gate Bipolar Transistors)), thereby reducing the number of components.

[0062] Regarding the inverter circuit (IGBT, smoothing capacitor section), it is possible to use a common circuit for the 1st U, V, W phase lines 31U, 31V, 31W and the 2nd U, V, W phase lines 32U, 32V, 32W, or to use separate circuits. Using a common inverter circuit offers the advantage of reducing the number of components. On the other hand, using separate inverter circuits allows for a reduction in the current supplied to each circuit compared to using a common circuit. In other words, if the inverter circuit is common, for example, the current required for the 1st U phase line 31U and the current required for the 2nd U phase line 32U must be supplied through a single wire (power line), but by using separate inverter circuits, the wiring can be separated, and the amount of current supplied to a single wire can be reduced.

[0063] Furthermore, when separate inverter circuits, the power supply for each inverter circuit can be either shared or separate. Sharing the power supply for each inverter circuit offers the benefit of reducing the number of components. On the other hand, separating the power supply for each inverter circuit allows for a reduction in the amount of current supplied compared to when the power supply is shared. In other words, when the power supply for the inverter circuits is shared, for example, the current required for two inverter circuits must be supplied through a single wire (power line), but by separating the power supplies for the inverter circuits, the wiring can be separated, and the amount of current supplied to a single wire can be reduced.

[0064] Furthermore, when the power supply is divided into two, even if there is a performance difference between the two power supplies, by matching the phases of the same type of phases, the positions of the positive and negative peaks of the induced voltage will coincide, allowing the rotor 10 to continue rotating smoothly without any particularly difficult control. This means that it does not even matter if two power supplies of different types are used, but more importantly, it does not matter if two power supplies of the same type are used, as it does not matter if performance differences occur due to aging degradation caused by manufacturing variations between the two power supplies. Therefore, it greatly contributes to reducing the difficulty of control design that takes aging degradation into account (such as initial control design and learning control design that monitors aging degradation).

[0065] The configuration and effects of this embodiment will now be explained in summary.

[0066] (1) The rotating electric machine 1 comprises a stator 20 configured such that a winding 30 passes through each of the multiple slots 23 an even number of times, a first U-phase wire 31U wound around the multiple slots 23, a first V-phase wire 31V wound around the multiple slots 23, a first W-phase wire 31W wound around the multiple slots 23, a second U-phase wire 32U wound around the multiple slots 23, a second V-phase wire 32V wound around the multiple slots 23, a second W-phase wire 32W wound around the multiple slots 23, and the first U-phase wire 31U, the first V-phase wire 31V, and the first W-phase wire 31W The system includes a rotor 10 that rotates due to the magnetic field generated by the second U phase wire 32U, the second V phase wire 32V, and the second W phase wire 32W, wherein the first U phase wire 31U and the second U phase wire 32U are wound in the same slot position, passing through the same number of times and with the same current flow direction, the first V phase wire 31V and the second V phase wire 32V are wound in the same slot position, passing through the same number of times and with the same current flow direction, and the first W phase wire 31W and the second W phase wire 32W are wound in the same slot position, passing through the same number of times and with the same current flow direction.

[0067] This configuration makes it possible to provide a rotating electric machine 1 having two three-phase coils (a first three-phase coil 31 and a second three-phase coil 32) and a winding structure designed to match the phases of phases of the same type.

[0068] Although embodiments of the present invention have been described above, these embodiments are merely examples of how the present invention can be applied, and are not intended to limit the technical scope of the present invention to the specific configurations of the above embodiments.

[0069] For example, when winding 30 is described as passing an even number of times, it includes not only cases where a single winding 30 passes an even number of times, but also cases where a winding 30 consisting of a bundle of multiple wires passes an even number of times, or where a winding 30 consisting of a set of wires wound multiple times passes an even number of times. Therefore, even if the number of wires in the bundle or the number of times the wires are wound is odd, if the bundle of wires or the set of wires passes an even number of times, it will still be considered as winding 30 passing an even number of times.

[0070] Furthermore, the case where the winding 30 passes through the same slot 23 twice is the same as the case where two windings 30 combined into one unit pass through once. Therefore, a case where two windings 30 combined into one unit pass through slot 23 once is equivalent to a case where the winding 30 passes through slot 23 twice. [Explanation of Symbols]

[0071] 1. Rotating electric machine 10 Rotors (rotor, common rotor) 20 Stator 23 slots 30 windings 31U 1st U phase line 31V 1st V phase line 31W 1st W phase wire 32U 2nd U phase wire 32V 2nd V phase line 32W 2nd W phase line

Claims

[Claim 1] It is a rotating electric machine, A stator configured such that a winding passes through each of the multiple slots an even number of times, The first U-phase wire wound around the aforementioned multiple slots, The first V-phase wire wound around the aforementioned multiple slots, The first W-phase wire wound around the aforementioned multiple slots, The second U-phase wire wound around the aforementioned multiple slots, The second V-phase wire wound around the aforementioned multiple slots, The second W-phase wire wound around the aforementioned multiple slots, A common rotor that rotates due to the magnetic fields generated by the first U phase, the first V phase, the first W phase, the second U phase, the second V phase, and the second W phase, Equipped with, The first U-phase wire and the second U-phase wire are wound in the same slot position, passing through the same number of times, and with the current flow direction being the same. The first V-phase wire and the second V-phase wire are wound in the same slot position, passing through the same number of times, and with the current flow direction being the same. The first W-phase wire and the second W-phase wire are wound in the same slot position, passing through the same number of times, and with the current flow direction being the same. Rotating electric machine.

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