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 odd 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 second U-phase wire 32U is wound in a slot position where the direction of current passage is reversed with respect to the first U-phase wire 31U and shifted by 180 degrees in electrical angle, the second V-phase wire 32V is wound in a slot position where the direction of current passage is reversed with respect to the first V-phase wire 31V and shifted by 180 degrees in electrical angle, and the second W-phase wire 32W is wound in a slot position where the direction of current passage is reversed with respect to the first W-phase wire 31W and shifted by 180 degrees in electrical angle.

Description

Technical Field

[0006] , , , ,

[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 the winding is configured to have an odd number of turns so that the winding passes through each of a plurality of slots an odd number of times, it is difficult to align the windings of the same phase in the same number within one slot. Therefore, the windings of two same phases are usually wound in different forms, and the positive peaks in the waveform of the induced voltage are usually 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 odd 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 preceding The device comprises a common rotor that rotates due to the magnetic field generated by the second U-phase wire, the second V-phase wire, and the second W-phase wire, wherein the second U-phase wire is wound in a slot position where the direction of current passage is reversed with respect to the first U-phase wire and shifted by 180 degrees in electrical angle, the second V-phase wire is wound in a slot position where the direction of current passage is reversed with respect to the first V-phase wire and shifted by 180 degrees in electrical angle, and the second W-phase wire is wound in a slot position where the direction of current passage is reversed with respect to the first W-phase wire and shifted by 180 degrees in electrical angle. [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 configuration diagram showing only the first three-phase coil in Figure 1. [Figure 3] Figure 3 is a configuration diagram showing only the second three-phase coil in Figure 1. [Figure 4] Figure 4 is an unfolded view of the windings in a rotating electric machine, with the lead wire side facing upwards and viewed from the inner circumference. [Figure 5] Figure 5 is a graph showing the time evolution of the induced voltage when two windings of the same phase are wound in different configurations. [Figure 6]Figure 6 is a graph showing the time evolution of the induced voltage when two identical phase windings are shifted by 180 degrees in electrical angle from Figure 5. [Figure 7] Figure 7 is a graph showing the time evolution of the induced voltage when the current flow direction of one phase is reversed from that in Figure 6. [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 3. Figure 1 is a configuration diagram showing the rotating electric machine 1 as viewed from the side opposite the lead wires. Figure 2 is a configuration diagram showing only the first three-phase coil 31 in Figure 1. Figure 3 is a configuration diagram showing only the second three-phase coil 32 in Figure 1.

[0011] In Figures 1 to 3, 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) (see Figures 2 and 3). 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 has 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. The rotor shaft 12 is provided in the through hole. The rotor core 11 is rotatably supported by the rotor shaft 12.

[0015] The 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 has a stator core 21 as a common core and a winding 30. 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, are wound around the stator core 21 to form the stator 20.

[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 each formed between a pair of circumferentially adjacent teeth 22. The slots 23 open into the through holes 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 21.

[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 circumferentially adjacent to each other, and the twenty - fourth slot 23x and the first slot 23a are circumferentially adjacent to each other, 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 odd number of times.

[0021] Here, the stator 20 is configured such that the winding 30 passes through each of the plurality of slots 23 three times. Thereby, it is possible to aim for an improvement in productivity by minimizing the number of winding turns. That is, one aspect of the present invention particularly preferably acts in such a case, and it becomes easier to make the number of passes of the winding 30 in each slot 23 uniform.

[0022] Subsequently, referring also to FIG. 4, the winding 30 will be described. FIG. 4 is a developed view of the winding 30 as viewed from the inner circumference with the lead - wire side on top in the rotating electric machine 1.

[0023] 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.

[0024] The first three-phase coil 31 has a first U-phase wire 31U, a first V-phase wire 31V, and a first W-phase wire 31W. The first three-phase coil 31 constitutes a three-phase four-pole coil. The second three-phase coil 32 has a second U-phase wire 32U, a second V-phase wire 32V, and a second W-phase wire 32W. The second three-phase coil 32 constitutes a three-phase four-pole coil. 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 electrically independent of each other.

[0025] As shown in Figures 1 and 4, the first U-phase wire 31U is wound around a plurality of slots 23. The first U-phase wire 31U has a first winding 31U1, a second winding 31U2, a third winding 31U3, a fourth winding 31U4, a fifth winding 31U5, and a sixth winding 31U6.

[0026] The first winding 31U1 is constructed by winding 30, which is input from the first U-phase lead wire U1in connected to a three-phase AC power supply (not shown), and winding it between the 13th slot 23m and the 8th slot 23h. The second winding 31U2 is constructed by continuing from the first winding 31U1 wound in the 8th slot 23h and winding it between the 13th slot 23m and the 8th slot 23h. The third winding 31U3 is constructed by continuing from the second winding 31U2 wound in the 8th slot 23h and winding it between the 12th slot 23l and the 7th slot 23g.

[0027] The fourth winding 31U4 is constructed by winding it between the first slot 23a and the 20th slot 23t, continuing from the third winding 31U3 wound in the seventh slot 23g. The fifth winding 31U5 is constructed by winding it between the first slot 23a and the 20th slot 23t, continuing from the fourth winding 31U4 wound in the 20th slot 23t. The sixth winding 31U6 is constructed by winding it between the 24th slot 23x and the 19th slot 23s, continuing from the fifth winding 31U5 wound in the 20th slot 23t. After winding the sixth winding 31U6 in the 19th slot 23s, it is connected to the first neutral point Mid1.

[0028] Thus, the first U-phase wire 31U includes a first coil 31UA that is wound twice between the 13th slot 23m and the 8th slot 23h and once between the 12th slot 23l and the 7th slot 23g, and a second coil 31UB that is wound twice between the 1st slot 23a and the 20th slot 23t and once between the 24th slot 23x and the 19th slot 23s.

[0029] The first V-phase wire 31V has a first winding 31V1, a second winding 31V2, a third winding 31V3, a fourth winding 31V4, a fifth winding 31V5, and a sixth winding 31V6.

[0030] The first winding 31V1 is constructed by winding 30, which is input from the first V-phase lead wire V1in connected to the three-phase AC power supply, and winding it between the 17th slot 23q and the 12th slot 23l. The second winding 31V2 is constructed by continuing from the first winding 31V1 wound in the 12th slot 23l and winding it between the 17th slot 23q and the 12th slot 23l. The third winding 31V3 is constructed by continuing from the second winding 31V2 wound in the 12th slot 23l and winding it between the 16th slot 23p and the 11th slot 23k.

[0031] The fourth winding 31V4 is constructed by winding it between the fifth slot 23e and the 24th slot 24x, continuing from the third winding 31V3 wound in the 11th slot 23k. The fifth winding 31V5 is constructed by winding it between the fifth slot 23e and the 24th slot 23x, continuing from the fourth winding 31V4 wound in the 24th slot 23x. The sixth winding 31V6 is constructed by winding it between the fourth slot 23d and the 23rd slot 23w, continuing from the fifth winding 31V5 wound in the 24th slot 23x. After winding the sixth winding 31V6 in the 23rd slot 23w, it is connected to the first neutral point Mid1.

[0032] Thus, the first V-phase wire 31V includes a first coil 31VA which is wound twice between the 17th slot 23q and the 12th slot 23l and once between the 16th slot 23p and the 11th slot 23k, and a second coil 31VB which is wound twice between the 5th slot 23e and the 24th slot 23x and once between the 4th slot 23d and the 23rd slot 23w.

[0033] The first W phase wire 31W has a first winding 31W1, a second winding 31W2, a third winding 31W3, a fourth winding 31W4, a fifth winding 31W5, and a sixth winding 31W6.

[0034] The first winding 31W1 is constructed by winding 30, which is input from the first W phase lead wire W1in connected to the three-phase AC power supply, and winding it between the 21st slot 23u and the 16th slot 23p. The second winding 31W2 is constructed by continuing from the first winding 31W1 wound around the 16th slot 23p and winding it between the 21st slot 23u and the 16th slot 23p. The third winding 31W3 is constructed by continuing from the second winding 31W2 wound around the 16th slot 23p and winding it between the 20th slot 23t and the 15th slot 23o.

[0035] The fourth winding 31W4 is wound continuously from the third winding 31W3 wound in the 15th slot 23o, and is constructed by winding between the 9th slot 23i and the 4th slot 24d. The fifth winding 31W5 is wound continuously from the fourth winding 31W4 wound in the 4th slot 23d, and is constructed between the 9th slot 23i and the 4th slot 23d. The sixth winding 31W6 is wound continuously from the fifth winding 31W5 wound in the 4th slot 23d, and is constructed between the 8th slot 23h and the 3rd slot 23c. The sixth winding 31V6 is wound in the 3rd slot 23c and then connected to the first neutral point Mid1.

[0036] Thus, the first W phase wire 31W includes a first coil 31WA which is wound twice between the 21st slot 23u and the 16th slot 23p and once between the 20th slot 23t and the 15th slot 23o, and a second coil 31WB which is wound twice between the 9th slot 23i and the 4th slot 23d and once between the 8th slot 23h and the 3rd slot 23c.

[0037] As shown in Figures 1 and 4, the second U-phase wire 32U is wound around a plurality of slots 23. The second U-phase wire 32U has a first winding 32U1, a second winding 32U2, a third winding 32U3, a fourth winding 32U4, a fifth winding 32U5, and a sixth winding 32U6.

[0038] The first winding 32U1 is constructed by winding 30, which is input from the second U-phase lead wire U2in connected to the three-phase AC power supply, and winding it between the 13th slot 23m and the 18th slot 23r. The second winding 32U2 is constructed by continuing from the first winding 32U1 wound in the 18th slot 23r and winding it between the 14th slot 23n and the 19th slot 23s. The third winding 32U3 is constructed by continuing from the second winding 32U2 wound in the 19th slot 23s and winding it between the 14th slot 23n and the 19th slot 23s.

[0039] The fourth winding 32U4 is constructed by winding it between the first slot 23a and the sixth slot 23f, continuing from the third winding 32U3 wound in the 19th slot 23s. The fifth winding 32U5 is constructed by winding it between the second slot 23b and the seventh slot 23g, continuing from the fourth winding 32U4 wound in the sixth slot 23f. The sixth winding 32U6 is constructed by winding it between the second slot 23b and the seventh slot 23g, continuing from the fifth winding 32U5 wound in the seventh slot 23g. After winding the sixth winding 32U6 in the seventh slot 23g, it is connected to the second neutral point Mid2.

[0040] Thus, the second U phase wire 32U includes a first coil 32UA that is wound once between the 13th slot 23m and the 18th slot 23r and twice between the 14th slot 23n and the 19th slot 23s, and a second coil 32UB that is wound once between the 1st slot 23a and the 6th slot 23f and twice between the 2nd slot 23b and the 7th slot 23g.

[0041] Furthermore, as shown in Figure 4, the second U-phase wire 32U is wound in a slot position where the direction of current passage is reversed with respect to the first U-phase wire 31U and shifted by 180 degrees in electrical angle (90 degrees in mechanical angle).

[0042] The second V-phase wire 32V has a first winding 32V1, a second winding 32V2, a third winding 32V3, a fourth winding 32V4, a fifth winding 32V5, and a sixth winding 32V6.

[0043] The first winding 32V1 is constructed by winding 30, which is input from the second V-phase lead wire V2in connected to the three-phase AC power supply, and winding it between the 17th slot 23q and the 22nd slot 23v. The second winding 32V2 is constructed by continuing from the first winding 32V1 wound in the 22nd slot 23v and winding it between the 18th slot 23r and the 23rd slot 23w. The third winding 32V3 is constructed by continuing from the second winding 32V2 wound in the 23rd slot 23w and winding it between the 18th slot 23r and the 23rd slot 23w.

[0044] The fourth winding 32V4 is constructed by winding it between the fifth slot 23e and the tenth slot 24j, continuing from the third winding 32V3 wound in the 23rd slot 23w. The fifth winding 32V5 is constructed by winding it between the sixth slot 23f and the eleventh slot 23k, continuing from the fourth winding 32V4 wound in the tenth slot 23j. The sixth winding 32V6 is constructed by winding it between the sixth slot 23f and the eleventh slot 23k, continuing from the fifth winding 32V5 wound in the eleventh slot 23k. After winding the sixth winding 32V6 in the eleventh slot 23k, it is connected to the second neutral point Mid2.

[0045] Thus, the second V-phase wire 32V includes a first coil 32VA which is wound once between the 17th slot 23q and the 22nd slot 23v and twice between the 18th slot 23r and the 23rd slot 23w, and a second coil 32VB which is wound once between the 5th slot 23e and the 10th slot 23j and twice between the 6th slot 23f and the 11th slot 23k.

[0046] Furthermore, as shown in Figure 4, the second V-phase wire 32V is wound in a slot position where the direction of current flow is reversed with respect to the first V-phase wire 31V and shifted by 180 degrees in electrical angle (90 degrees in mechanical angle).

[0047] The second W phase wire 32W has a first winding 32W1, a second winding 32W2, a third winding 32W3, a fourth winding 32W4, a fifth winding 32W5, and a sixth winding 32W6.

[0048] The first winding 32W1 is constructed by winding 30, which is input from the second W-phase lead wire W2in connected to the three-phase AC power supply, and winding it between the 21st slot 23u and the 2nd slot 23b. The second winding 32W2 is constructed by continuing from the first winding 32W1 wound in the 2nd slot 23b and winding it between the 22nd slot 23v and the 3rd slot 23c. The third winding 32W3 is constructed by continuing from the second winding 32W2 wound in the 3rd slot 23c and winding it between the 22nd slot 23v and the 3rd slot 23c.

[0049] The fourth winding 32W4 is constructed by winding it between the ninth slot 23i and the fourteenth slot 24n, continuing from the third winding 32W3 wound in the third slot 23c. The fifth winding 32W5 is constructed by winding it between the tenth slot 23j and the fifteenth slot 23o, continuing from the fourth winding 32W4 wound in the fourteenth slot 23n. The sixth winding 32W6 is constructed by winding it between the tenth slot 23j and the fifteenth slot 23o, continuing from the fifth winding 32W5 wound in the fifteenth slot 23o. The sixth winding 32V6 is wound in the fifteenth slot 23o and then connected to the second neutral point Mid2.

[0050] Thus, the second W phase wire 32W includes a first coil 32WA that is wound once between the 21st slot 23u and the 2nd slot 23b and twice between the 22nd slot 23v and the 3rd slot 23c, and a second coil 32WB that is wound once between the 9th slot 23i and the 14th slot 23n and twice between the 10th slot 23j and the 15th slot 23o.

[0051] Furthermore, as shown in Figure 4, the second W phase wire 32W is wound in a slot position where the current flow direction is reversed and the electrical angle is shifted by 180 degrees relative to the first W phase wire 31W.

[0052] As shown in Figures 2 and 3, 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.

[0053] Next, the operation of the rotating electric machine 1 will be explained with reference to Figures 5 to 7. Figure 5 is a graph showing the time change of the induced voltage when two identical phase windings 30 are wound in different configurations. Figure 6 is a graph showing the time change of the induced voltage when the two identical phase windings 30 are shifted by 180 degrees in electrical angle from Figure 5. Figure 7 is a graph showing the time change of the induced voltage when the current flow direction of one phase is reversed from Figure 6.

[0054] Note that Figures 5 to 7 only show the case of the first U-phase line 31U and the second U-phase line 32U, but the same applies to the cases of the first V-phase line 31V and the second V-phase line 32V, and the first W-phase line 31W and the second W-phase line 32W.

[0055] If the winding 30 is configured to pass through each of the multiple slots 23 an odd number of times, resulting in an odd number of turns, it becomes difficult to ensure that the same number of windings 30 of the same phase are present within a single slot 23. Therefore, as shown in Figure 5, two windings 30 of the same phase are wound in different ways, and the positive peaks of the dielectric voltage waveforms are usually offset from each other. When the positive peaks of the dielectric voltage waveforms 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, increasing the difficulty of the control design.

[0056] Therefore, as a concept in one aspect of the present invention, the following concept is introduced. That is, as shown in Figure 6, the positive and negative vertices of two identical phase windings 30 are aligned by shifting them by 180 degrees in electrical angle. However, as shown in Figure 6, when the positive and negative vertices align, the induced voltages cancel each other out. Therefore, as shown in Figure 7, the negative vertex is reversed to the positive vertex by reversing the direction of current flow. This makes it possible to align the vertices of two identical phase windings 30 even in an odd-turn configuration where the two identical phase windings 30 must be of different forms. In other words, it is possible to design the circuit so that the phases of identical phases align.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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).

[0061] The configuration and effects of this embodiment will now be explained in summary.

[0062] (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 odd 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 The device comprises a rotor 10 that rotates due to the magnetic field generated by 31W, a second U phase wire 32U, a second V phase wire 32V, and a second W phase wire 32W, wherein the second U phase wire 32U is wound in a slot position where the direction of current passage is reversed with respect to the first U phase wire 31U and shifted by 180 degrees in electrical angle, the second V phase wire 32V is wound in a slot position where the direction of current passage is reversed with respect to the first V phase wire 31V and shifted by 180 degrees in electrical angle, and the second W phase wire 32W is wound in a slot position where the direction of current passage is reversed with respect to the first W phase wire 31W and shifted by 180 degrees in electrical angle.

[0063] 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.

[0064] (2) The stator 20 is configured such that the winding 30 passes through each of the multiple slots 23 three times.

[0065] This configuration allows for minimizing the number of windings and improving manufacturability. One aspect of the present invention is particularly suitable in such cases, as it makes it easier to equalize the number of times the winding 30 passes through each slot.

[0066] (3) The stator 20 is also configured as a short-pitch winding in which the magnetic pole pitch is different from the coil pitch.

[0067] With this configuration, compared to full-slot winding, short-slot winding, which allows for variable coil pitch settings, makes it easier to equalize the number of times the winding 30 passes through each slot 23.

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

1. It is a rotating electric machine, A stator configured such that a winding passes through each of the multiple slots an odd 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 second U-phase wire is wound in a slot position where the direction of current passage is reversed with respect to the first U-phase wire and shifted by 180 degrees in electrical angle. The second V-phase wire is wound in a slot position where the direction of current passage is reversed with respect to the first V-phase wire and shifted by 180 degrees in electrical angle. The second W phase wire is wound in a slot position where the direction of current passage is reversed with respect to the first W phase wire and shifted by 180 degrees in electrical angle. Rotating electric machine.

2. A rotating electric machine according to claim 1, The stator is configured such that the winding passes through each of the plurality of slots three times. Rotating electric machine.

3. A rotating electric machine according to claim 1 or 2, The stator is configured as a short-pitch winding in which the pole pitch differs from the coil pitch. Rotating electric machine.

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