JP2013081351A - Rotary electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary electric machine in which the interphase distance required for insulation can be shortened, by reducing interphase resonance of a stator winding thereby reducing the maximum interphase voltage.SOLUTION: A rotary electric machine 1 comprises: a rotor 14 having a plurality of pairs of magnetic pole in the circumferential direction; and a stator 20 including a stator core 30 having a plurality of slots 31 in the circumferential direction, and a stator winding 40 consisting of a plurality of phase windings inserted into the slots 31 and wound around the stator core 30. The stator core 30 has n(n=2) same-phase slots containing the phase winding of the same-phase continuously in the circumferential direction for each magnetic pole. Each phase winding consists of a first partial winding (a), a second partial winding (b), a third partial winding (c), and a fourth partial winding (d) divided into 2n (4) windings from one end to the other end in the drawing direction and placed in order from one end side in the drawing direction. The first partial winding (a) and the fourth partial winding (d) are contained in the different same-phase slots of the stator core 30.

Description

  The present invention relates to a rotating electrical machine used as, for example, an electric motor or generator for a vehicle.

  As a conventional rotating electrical machine, a rotor having a plurality of pairs of magnetic poles arranged in the circumferential direction, a stator core having a plurality of slots arranged in the circumferential direction and arranged to face the rotor in the radial direction, and There is known a rotating electrical machine including a stator having a stator winding formed of a plurality of phase windings inserted into the slot and wound around the stator core. In such a rotating electrical machine, due to a demand for higher output, the stator core is configured to have a plurality of in-phase slots that are continuous in the circumferential direction for each magnetic pole, in which phase windings of the same phase are accommodated. ing.

  Patent Document 1 discloses a three-phase stator winding wound by wave winding in a stator of each phase double slot (when there are two in-phase slots). Each phase winding (U phase, V phase, W phase) constituting this stator winding is, as shown in FIG. 19 (a), from the output terminal on one end side in the extending direction to the neutral point on the other end side. Is divided into four parts, and is composed of first to fourth partial windings (a) to (d) arranged in order from the output terminal side. As shown in FIG. 19B, each phase winding in this case has a first partial winding (a) and a fourth partial winding (d) accommodated in the same in-phase slot U1, and the second partial winding. (B) and the third partial winding (c) are connected so as to be accommodated in the same in-phase slot U2. FIG. 19B shows two U-phase slots U1 and U2 as representatives.

  Further, Patent Document 2 discloses a lap winding and a wave winding in a stator in which there are six layers of stator winding conductors in each slot in each phase triple slot (when there are three in-phase slots). A mixed winding method is disclosed, in which four layers on the inner peripheral side are filled with slots by overlapping winding, and then two layers on the outer peripheral side are filled with wave winding. In this case, the first partial winding and the sixth partial winding of each phase winding are connected so as to be accommodated in the same in-phase slot.

  As described above, the reason why the most advanced partial winding and the last partial winding are accommodated in the same in-phase slot is to prevent the coil end from becoming higher, and the shape of the crossover wire that crosses the coil end in the radial direction. The most common is to make it as easy as possible.

  In order to keep the coil end as low as possible, it is effective to align the position of each phase output line and the neutral point to the outer diameter side of the stator core. The number of crossovers that cross the coil end in the radial direction is limited to an even number. In the case of a rotating electrical machine having a double slot for each phase, the number is 0 or 2 for each phase.

  When the number of crossovers crossing over the coil end is zero, the windings are superimposed six times on the coil end regardless of the slot insertion position of each partial winding. The shape of the crossover line is the same for nine types. Here, FIG. 20A shows the case where the first partial winding and the fourth partial winding are inserted into the same slot. FIG. 20B shows the first partial winding and the second partial winding. The crossovers of the crossover lines in the case where is inserted in the same slot are shown. In each figure, a connecting wire is shown on the inner diameter side of the slot. Actually, this connecting wire is connected between the slots so as to avoid the inner diameter side in the path from the inner periphery side to the coil end to the inner periphery side. At this time, it is impossible that the first partial winding and the third partial winding are inserted into the same slot as long as the number of crossovers across the coil end is zero.

  On the other hand, when the total number of crossovers across the coil end is six, the first partial winding and the second partial winding, and the third partial winding and the fourth partial winding are respectively inserted in the same slot. As shown in FIG. 21 (c), the windings overlap six times on the coil end, and there are eight types of crossover shape patterns. Further, when the first partial winding and the third partial winding, and the second partial winding and the fourth partial winding are respectively inserted in the same slot, as shown in FIG. There are four overlapping windings, and there are five types of crossover shape patterns. When the first partial winding and the fourth partial winding and the second partial winding and the third partial winding are respectively inserted in the same slot, as shown in FIG. There are four overlapping windings, and there are four types of crossover shape patterns.

  Therefore, in the wave winding, the coil end is the lowest and easy to manufacture is a configuration in which the first partial winding and the fourth partial winding are inserted into the same slot. A method is used.

JP 2000-69729 A JP 2004-64914 A

By the way, a square wave voltage having a maximum voltage V ₀ as shown in FIG. 22 is applied between the output terminals of each phase when the motor is operated as an electric motor. The maximum voltage generated between the line phases exceeds V ₀ as shown in FIG. FIG. 24 is an example in which the amplification factor of the output voltage with respect to the input voltage in the stator winding is plotted with respect to the frequency. The stator winding has a resonance frequency with respect to the applied high frequency component of the square wave. This is the cause of voltage amplification.

  When the maximum interphase voltage is increased in this way, there is a need to increase the insulation distance by increasing the interphase distance by increasing the thickness of the stator winding film in order to prevent a current short circuit between phases.

  The present invention has been made in view of the above circumstances, and it is possible to reduce resonance between phases of the stator winding, reduce the maximum interphase voltage, and shorten the interphase distance necessary for insulation. Providing a rotating electrical machine is a problem to be solved.

  The invention according to claim 1, which has been made to solve the above problems, includes a rotor having a plurality of pairs of magnetic poles arranged in the circumferential direction, and a plurality of slots arranged in the circumferential direction. A rotating electrical machine comprising: a stator core disposed radially opposite to the stator; and a stator having a stator winding formed of a plurality of phase windings inserted into the slot and wound around the stator core. The stator iron core has n (n is a natural number of 2 or more) continuous in the circumferential direction for each of the magnetic poles, and each phase winding has an in-phase slot in which the phase winding of the same phase is accommodated. The wire is divided into k (k is a natural number of 2 or more) from one end to the other end in the extending direction, and is arranged in order from one end side in the extending direction. The first partial winding and the kth partial winding are different from each other in the stator core. It is housed in the in-phase slot.

  According to the first aspect of the present invention, each phase winding is divided into k pieces from one end to the other end in the extending direction, and is arranged in order from one end side in the extending direction. The first partial winding and the kth partial winding are accommodated in different in-phase slots of the stator core. As a result, reduction of coil inductance due to negative mutual inductance can be suppressed, so that the resonance frequency is lowered and the resonance peak is lowered. Thereby, the resonance between the phases of the stator windings can be reduced. As a result, the maximum interphase voltage is reduced, and the interphase distance necessary for insulation can be shortened.

  The resonance frequency fn of the stator winding that affects the interphase voltage is obtained by the following equation 1 where L is the coil inductance and C is the capacitance.

fn = 1 / 2π√LC ......... Formula 1
Here, the coil inductance L as a resonance element is determined by a self-inductance generated by a single coil and a mutual inductance generated by coupling of the coils. The capacitance C is determined mainly by the ground capacitance generated between the stator winding and the stator core. In the present invention, by changing the accommodation position of the partial winding of each phase winding accommodated in the in-phase slot as described above, negative mutual inductances that affect each other can be brought close to zero. Thereby, the resonance characteristics can be changed so that the resonance frequency fn is lowered and the resonance peak is lowered.

  In the present invention, the division number (value of k) of the partial winding in each phase winding may be an odd number or an even number as long as it is a natural number of 2 or more.

  According to a second aspect of the present invention, each of the phase windings is divided into 2n pieces from one end to the other end in the extending direction and is arranged in order from one end side in the extending direction. .., 2n partial winding, wherein the first partial winding and the second n partial winding are accommodated in the in-phase slots of the stator core different from each other.

  According to the invention described in claim 2, each phase winding is divided into 2n pieces from one end to the other end in the extending direction, and is arranged in order from one end side in the extending direction. The first n-th partial winding and the second n-th partial winding are accommodated in different in-phase slots of the stator core. That is, according to the present invention, when each phase winding is divided into an even number of partial windings, the reduction of coil inductance due to negative mutual inductance can be suppressed, so that the resonance frequency is lowered and resonance is reduced. The peak is lowered. Thereby, the resonance between the phases of the stator windings can be reduced. As a result, the maximum interphase voltage is reduced, and the interphase distance necessary for insulation can be shortened.

  According to a third aspect of the present invention, each of the phase windings includes a second m (m is an all natural number satisfying 1 ≦ m ≦ n) partial winding and the (2m -1) The partial winding is housed in the same in-phase slot of the stator core.

  According to invention of Claim 3, the 2m partial winding located in the even-numbered direction from the extending direction one end side of each phase winding, and the odd-numbered (2m-1) part located in the odd-numbered one before that The windings are housed in the same in-phase slot. Thereby, coupled with the effect of the invention of claim 1, resonance between phases of the stator windings can be synergistically reduced. As a result, the maximum interphase voltage is further reduced, and the interphase distance required for insulation can be further shortened.

  According to a fourth aspect of the present invention, each of the phase windings includes a plurality of parallel windings arranged in j rows (j is a natural number of 2 or more) from each phase terminal to a neutral point. The wire is divided into k partial windings from one end to the other end in the extending direction, and the first to k / 2th partial windings and the (k / 2 + 1) th to kth partial windings are the stator core. Are housed in the different in-phase slots.

  According to the fourth aspect of the present invention, each phase winding is composed of a plurality of parallel windings arranged in j rows from each phase terminal to the neutral point, and each parallel winding includes first to k-th windings. / 2 partial winding (first-half partial winding group) and (k / 2 + 1) to k-th partial winding (second-half partial winding group) are accommodated in different in-phase slots of the stator core. Therefore, it is possible to weaken the magnetic coupling between the first to k / 2th partial windings and the (k / 2 + 1) th to kth partial windings, and to suppress the reduction of coil inductance due to negative mutual inductance. The resonance frequency is lowered and the resonance peak is lowered. Thereby, the resonance between the phases of the stator windings can be reduced.

  In the present invention, when the value of k is an odd number, the partial winding located in the center is the same as the partial winding on the second half side even if it is accommodated in the same in-phase slot as the partial winding on the first half side. Either may be accommodated in the in-phase slot. For example, when k = 3, each phase winding is divided into three parts: a first partial winding (a), a second partial winding (b), and a third partial winding (c). In this case, the second partial winding (b) located in the center may be accommodated in the same in-phase slot as the first partial winding (a) on the first half side, and the third partial winding (c) on the second half side. ) In the same in-phase slot.

  According to a fifth aspect of the present invention, there is provided a rotor, a stator core having a plurality of slots arranged in the circumferential direction and arranged radially facing the rotor, and the stator core inserted into the slot. And a stator having a stator winding composed of a plurality of phase windings wound around a core, wherein each phase winding has k portions extending from one end to the other in the extending direction. Each of the partial windings is divided into windings, and each time the partial windings are wound by 360 ° / k in the circumferential direction, the reversal of the winding traveling direction is repeated a predetermined number of times.

  According to the invention described in claim 5, each phase winding is wound in the winding direction each time each partial winding divided into k pieces from one end to the other in the extending direction is wound 360 ° / k in the circumferential direction. Is repeated a predetermined number of times. Thereby, since each partial winding is accommodated in the same slot, it can be avoided that the partial windings are mixedly accommodated in the same slot. As a result, the magnetic coupling between the partial windings can be weakened, and the reduction of the coil inductance due to the negative mutual inductance can be suppressed, so that the resonance frequency is lowered and the resonance peak is lowered. Therefore, resonance between the phases of the stator winding can be reduced. As a result, the maximum interphase voltage is reduced, and the interphase distance necessary for insulation can be shortened. In the case of the present invention as well, the resonance frequency fn of the stator winding that affects the interphase voltage can be obtained by the above-described equation 1 in the same manner as in the first aspect of the invention.

  According to a sixth aspect of the present invention, there is provided a rotor, a stator core having a plurality of slots arranged in the circumferential direction and arranged radially opposite to the rotor, and the stator core inserted into the slots. And a stator having a stator winding composed of a plurality of phase windings wound around a core of the stator, wherein each of the phase windings is arranged in j rows from each phase terminal to a neutral point. Each of the parallel windings is divided into k partial windings from one end to the other end in the extending direction, and counted from one end side in the extending direction of each parallel winding. The partial windings positioned at the same position are arranged in alignment so as to be close to each other in the same slot.

  According to the sixth aspect of the present invention, each phase winding is composed of a plurality of parallel windings arranged in j rows from each phase terminal to the neutral point, and each parallel winding is connected from one end in the extending direction to the other. The end windings are divided into k partial windings, and the partial windings located at the same position as counted from one end side in the extending direction of the parallel windings are arranged so as to be close to each other in the same slot. Therefore, for example, when each parallel winding is divided into four partial windings (when k = 4), the first partial windings, the second partial windings of each parallel winding, the third By arranging the partial windings and the fourth partial windings close to each other in the slots, the magnetic coupling between the partial windings is increased. In other words, the first half winding and the second half partial winding of each parallel winding such as the first partial winding and the fourth partial winding are separated, and the magnetic coupling between the first half and the second half partial winding becomes relatively weak. As a result, reduction of coil inductance due to negative mutual inductance can be suppressed, so that the resonance frequency is lowered and the resonance peak is lowered. Thereby, the resonance between the phases of the stator windings can be reduced. As a result, the maximum interphase voltage is reduced, and the interphase distance necessary for insulation can be shortened.

  The invention according to claim 7 is the invention according to claim 6, wherein each of the parallel windings includes the first to k / 2th partial windings and the (k / 2 + 1) th to kth partial windings. It is housed in different in-phase slots of the stator core.

  According to the seventh aspect of the present invention, each of the parallel windings includes the first to k / 2th partial windings (first half side partial winding group) and the (k / 2 + 1) th to kth partial windings ( Since the second half winding group) is accommodated in different in-phase slots of the stator core, it is between the first to k / 2th windings and the (k / 2 + 1) th to kth windings. The magnetic coupling of is weakened. Furthermore, each parallel winding is aligned and arranged so that the same number of partial windings counted from one end side in the extending direction are close to each other in the same slot. In the winding group, the partial windings are aligned in an isolated state. Therefore, compared with the case where the partial windings are mixed in the same in-phase slot, the magnetic coupling between the partial windings is weakened, so that the effect of suppressing the reduction of the coil inductance due to the negative mutual inductance can be further increased. it can. As a result, an ideal resonance reduction effect between the phases of the stator windings can be obtained.

  In the present invention, when the value of k is an odd number, as in the fourth aspect of the invention, the partial winding located at the center has the same in-phase slot and the second half side portion as the first half side partial winding. It may be accommodated in any of the same in-phase slots as the winding.

  The invention described in claim 8 is characterized in that all of the winding methods of the first to second n partial windings are wave windings.

  According to invention of Claim 8, a stator winding | coil can be easily formed by making all the winding systems of the 1st-2nd n partial winding into a wave winding. Moreover, the effect of reducing resonance between the phases of the stator windings can be obtained with certainty.

  According to a ninth aspect of the present invention, the stator winding includes a plurality of phase windings in which a plurality of conductor segments inserted and arranged in the axial direction in the slots are connected in series and wound around the stator core. Consists of wires, and on one end side in the axial direction of the stator core, joint portions where the end portions of the conductor segments extending from different slots are joined to each other are arranged periodically and radially in the circumferential direction The first coil end group is formed, and the other end side in the axial direction of the stator core includes a plurality of turn portions that connect the slot accommodating portions accommodated in the different slots outside the slots. A second coil end group is formed.

  According to the ninth aspect of the present invention, since the conductor segment alone is very short and easy to handle as compared with the case where the stator winding is formed of a continuous line, the stator winding is It can be easily manufactured.

  The invention according to claim 10 is characterized in that the alternating current flowing through the stator winding has a maximum voltage of 330 V or more between the output terminals of the respective phases.

  According to the tenth aspect of the present invention, considering the case where partial discharge occurs between two conductors having a potential difference, according to Paschen's law shown in FIG. Can occur. Therefore, the required spatial distance between conductors for insulation has a positive correlation with the interphase voltage in the region of about 330 V or more, and the necessary interphase distance can be directly reduced by reducing the maximum interphase voltage.

FIG. 3 is an axial sectional view of the rotating electrical machine according to the first embodiment. 1 is an overall perspective view of a stator according to Embodiment 1. FIG. FIG. 3 is an explanatory diagram showing a state where conductor segments are inserted into slots of the stator core in the first embodiment. It is explanatory drawing which shows the winding system of each phase winding in Embodiment 1, Comprising: (a) is the perspective view seen from diagonally upward, (b) is the top view seen from the axial direction, (c ) Is a development view developed in the circumferential direction. (A) is a connection diagram of each phase winding which comprises the stator winding | coil which concerns on Embodiment 1, (b) is accommodated in two in-phase slots of the U phase of the stator core which concerns on Embodiment 1. FIG. It is a schematic diagram which shows the accommodation position of the made U-phase partial winding. It is a graph which shows the relationship between the partial discharge start voltage shown by Paschen's law, atmospheric pressure, and distance between conductors. It is a graph which shows the relationship between the frequency of Embodiment 1 (this invention) and the conventional 1 and a gain. (A) is explanatory drawing which shows the voltage measurement position of the stator winding | coil in a test, (b) is the same phase of the partial winding of the U-phase winding which comprises the stator winding | coil based on this invention used for the test It is a schematic diagram which shows the accommodation position in a slot. It is a graph which shows the voltage measurement result of this invention, the conventional 1 and the conventional 2 in a test. It is explanatory drawing which shows the winding system of each phase winding in the modification 1, Comprising: (a) is the perspective view seen from diagonally upward, (b) is the top view seen from the axial direction. It is explanatory drawing which shows the winding system of each phase winding in modification 2, Comprising: (a) is the perspective view seen from diagonally upward, (b) is the top view seen from the axial direction, (c ) Is a development view developed in the circumferential direction. FIG. 6 is a connection diagram of each phase winding constituting the stator winding according to the second embodiment. FIG. 6 is an explanatory view showing accommodation positions in slots of first to fourth partial windings constituting respective phase windings of a stator winding according to a second embodiment. FIG. 6 is a connection diagram of each phase winding constituting the stator winding according to the third embodiment. FIG. 10 is a circumferential development view showing a winding method of each phase winding constituting the stator winding according to the third embodiment. FIG. 6 is a circumferential development view showing a winding method of each phase winding constituting the stator winding according to Comparative Example 1; It is explanatory drawing which shows the accommodation position in the slot of the 1st-4th partial winding which comprises each parallel winding of the stator winding concerning Embodiment 4. FIG. 10 is an explanatory diagram showing accommodation positions in slots of first to fourth partial windings constituting respective parallel windings of a stator winding according to a fifth embodiment. (A) is a connection diagram of each phase winding which comprises the stator winding | coil in the conventional rotary electric machine, (b) is accommodated in two in-phase slots of U phase of the stator core in the conventional rotary electric machine. It is a schematic diagram which shows the accommodation position of the made U-phase partial winding. FIG. 6 is an explanatory diagram showing the accommodation positions in the slots of the first to fourth partial windings when the number of crossover wires that cross the stator in the radial direction is zero in the rotating electrical machine having double slots for each phase; (A) shows a case where the first partial winding and the fourth partial winding are in the same slot, and (b) shows a case where the first partial winding and the second partial winding are in the same slot. FIG. 6 is an explanatory diagram showing the accommodation positions in the slots of the first to fourth partial windings when the number of crossover wires that traverse the stator in the radial direction is two in the rotary electric machine with double slots for each phase; , (A) shows the case where the first partial winding and the fourth partial winding are in the same slot, (b) shows the case where the first partial winding and the third partial winding are in the same slot, c) shows the case where the first partial winding and the second partial winding are in the same slot. It is a graph which shows the voltage waveform applied between each phase output terminal in the conventional rotary electric machine. It is a graph which shows the voltage waveform between the phases amplified by resonance of the stator winding | coil in the conventional rotary electric machine. It is a graph which shows the voltage amplification factor of the stator winding | coil with respect to a frequency in the conventional rotary electric machine.

  Hereinafter, embodiments of a rotating electrical machine according to the present invention will be specifically described with reference to the drawings.

Embodiment 1
FIG. 1 is an axial cross-sectional view schematically showing the configuration of the rotating electrical machine according to the embodiment. The rotating electrical machine 1 according to the present embodiment is used as a vehicular electric motor. As shown in FIG. 1, a pair of substantially bottomed cylindrical housing members 10a and 10b are joined at openings. The housing 10, the rotor 14 fixed to the rotary shaft 13 rotatably supported by the housing 10 via bearings 11 and 12, and the housing 10 at a position surrounding the rotor 14. And a stator 20.

  The rotor 14 has a plurality of magnetic poles arranged on the outer circumferential side facing the inner circumferential side of the stator 20 in the radial direction so that the polarities are alternately different at a predetermined distance in the circumferential direction. These magnetic poles are formed by a plurality of permanent magnets embedded in predetermined positions of the rotor 14. The number of magnetic poles of the rotor 14 is not limited because it varies depending on the rotating electrical machine. In this embodiment, an 8-pole rotor (N pole: 4, S pole: 4) is used.

  Next, the stator 20 will be described with reference to FIGS. FIG. 2 is an overall perspective view of the stator according to the first embodiment. FIG. 3 is an explanatory diagram showing a state where conductor segments are inserted into slots of the stator core in the first embodiment. 4A and 4B are explanatory views showing a winding method of each phase winding in the first embodiment, wherein FIG. 4A is a perspective view seen from obliquely above, and FIG. 4B is a plan view seen from the axial direction. (C) is a development view developed in the circumferential direction. FIG. 5A is a connection diagram of each phase winding constituting the stator winding according to the first embodiment, and FIG. 5B is two U-phase slots of the U phase of the stator core according to the first embodiment. FIG. 4 is a schematic diagram showing a housing position of a U-phase partial winding housed in 31.

  As shown in FIG. 2, the stator 20 includes an annular stator core 30 having a plurality of slots 31 in the circumferential direction, and open ends of a plurality of substantially U-shaped conductor segments 50 inserted into the slots 31. Three-phase (U-phase, V-phase, W-phase) stator winding 40 in which the end portions of the parts are connected by welding on one side in the axial direction of the stator core 30 and wound around the stator core 30; It has.

  The stator core 30 is configured by laminating a plurality of core sheets (steel plates) in the axial direction. The inner circumferential surface of the stator core 30 includes a plurality of slots 31 that pass through the stator core 30 in the axial direction and have a substantially rectangular cross section so as to accommodate the stator winding 40 at equal pitches in the circumferential direction. Are provided radially in the radial direction. The number of slots 31 formed in the stator core 30 is two per one phase of the stator winding 40 with respect to the number of magnetic poles (eight magnetic poles) of the rotor 14, and the slot multiple n ( n is a natural number of 2 or more). In other words, the stator core 30 is provided with two in-phase slots 31 for accommodating the same-phase phase windings 41 in the circumferential direction for each of the magnetic poles. Therefore, in this embodiment, the number of slots is set to 48 since 8 × 3 × 2 = 48.

  The stator winding 40 wound around the slot 31 of the stator core 30 is configured by joining ends of the plurality of substantially U-shaped conductor segments 50 on the open end side to each other by welding. . The conductor segment 50 is formed by bending a flat conductor whose outer periphery is covered with an insulating coating (not shown) into a U shape. In addition, the conductor exposure part (not shown) is formed in the junction part 56 joined by welding of the both ends of the conductor segment 50 by peeling an insulating film.

  As shown in FIG. 3, the conductor segment 50 formed in a substantially U shape includes a pair of straight portions 51 and 51 that are parallel to each other and a turn portion 52 that connects one end of the pair of straight portions 51 and 51 to each other. Become. A top step 53 extending along the end surface 30 a of the stator core 30 is provided at the center of the turn portion 52, and a predetermined amount with respect to the end surface 30 a of the stator core 30 is provided on both sides of the top step 53. An inclined portion inclined at an angle of is provided. Reference numeral 24 denotes an insulator that electrically insulates between the stator core 30 and the stator winding 40.

  FIG. 3 shows a pair of conductor segments 50A and 50B that are inserted into two adjacent slots 31A and 31B of the same phase. In this case, in the two conductor segments 50A and 50B, the pair of straight portions 51 and 51 are inserted into the adjacent two slots 31A and 31B separately from one end in the axial direction instead of the same slot 31. The That is, in the two conductor segments 50A and 50B on the right side of FIG. 3, one conductor segment 50A has one straight portion 51 inserted into the outermost layer (sixth layer) of one slot 31A and the other straight line segment 50A. The portion 51 is inserted into the fifth layer of another slot (not shown) separated by one magnetic pole pitch (NS magnetic pole pitch) in the counterclockwise direction of the stator core 30.

  In the other conductor segment 50B, one straight portion 51 is inserted into the outermost layer (sixth layer) of the slot 31B adjacent to the slot 31A, and the other straight portion 51 extends in the counterclockwise direction of the stator core 30. It is inserted into the fifth layer of another slot (not shown) separated by one magnetic pole pitch (NS magnetic pole pitch). That is, the two conductor segments 50A and 50B are arranged in a state shifted by one slot pitch in the circumferential direction. In this way, the straight portions 51 of the even number of conductor segments 50 are inserted and arranged in all the slots 31. In the case of the present embodiment, a total of six straight portions 51 are stacked and arranged in one row in the radial direction in each slot 31.

  The open ends of the pair of straight portions 51, 51 extending from the slot 31 toward the other axial end are opposite to each other in the circumferential direction so as to be obliquely inclined with respect to the end surface 30a of the stator core 30 at a predetermined angle. Twisted to the side, a twisted portion 54 (see FIGS. 2 and 4) having a length substantially equal to the half magnetic pole pitch is formed. Then, on the other end side in the axial direction of the stator core 30, the tips of the predetermined twisted portions 54 of the conductor segments 50 are joined together by welding and electrically connected in a predetermined pattern. That is, by connecting predetermined conductor segments 50 in series, three phase windings 41 (U phase, spirally wound in the circumferential direction along the slots 31 of the stator core 30 are wound. A stator winding 40 having V phase and W phase) is formed.

  For each phase of the stator winding 40, a winding (coil) that makes six turns around the stator core 30 is formed by a basic U-shaped conductor segment 50. However, for each phase of the stator winding 40, a segment having an output lead wire and a neutral lead wire integrally, and a segment having a turn portion connecting the first and second rounds are basically The conductor segment 50 is composed of a deformed segment (not shown). Using these deformed segments, as shown in FIG. 5A, the winding ends of the respective phases of the stator winding 40 are connected by star connection.

  As shown in FIG. 5 (a), the three phase windings 41 (U phase, V phase, W phase) constituting the stator winding 40 are formed in the other end side from the output terminal on one end side in the extending direction. The first partial winding (a), the second partial winding (b), which are divided into 2n pieces (n = 2 to 4 in the present embodiment) up to the sex point and are arranged in order from one end side in the extending direction, The third partial winding (c) and the fourth partial winding (d) are included. The winding methods of the first to fourth partial windings (a) to (d) are all wave winding.

  In this embodiment, each of the three phase windings 41 constituting the stator winding 40 is divided into 2n (n = 2 to 4) partial windings from one end to the other end in the extending direction. However, each phase winding 41 may be divided into two or more arbitrary number k (k is a natural number of 2 or more) of partial windings from one end to the other end in the extending direction.

  In this embodiment, as shown in FIG. 5B, each phase winding 41 has a first partial winding (a) and a fourth partial winding (d) in different in-phase slots 31 of the stator core 30. Contained. In FIG. 5B, two U-phase slots U1 and U2 of the U phase are shown as representatives, and the V and W phases are the same as the U phase.

  In addition, each phase winding 41 includes a second m (m is a natural number satisfying 1 ≦ m ≦ n) partial winding positioned evenly from the output terminal side, and an odd number one before the second m partial winding. The (2m-1) th partial winding located in the second position is accommodated in the same in-phase slot 31 of the stator core 30. That is, in this embodiment, since m is 1 and 2, as shown in FIG. 5B, the second partial winding (b) of the U-phase winding 41 and the first partial winding (a ) Are accommodated in the same in-phase slot U1, and the fourth partial winding (d) and the third partial winding (c) are accommodated in the same in-phase slot U2.

  A plurality of turn portions 52 of the conductor segment 50 protruding from one end face of the stator core 30 are fixed to one end side in the axial direction of the stator winding 40 configured as described above, as shown in FIG. A first coil end group 47 is formed that is laminated in the radial direction of the core core 30. Further, on the other end side in the axial direction of the stator winding 40, a plurality of oblique portions 55 of the conductor segments 50 protruding from the other end surface of the stator core 30 and welded joint portions 56 are arranged in the radial direction of the stator core 30. A second coil end group 48 is formed by being stacked on each other.

  In addition, the rotating electrical machine 1 of the present embodiment is set so that the alternating current flowing through the stator winding 40 becomes a maximum voltage of 330 V or more between the phase output terminals according to Paschen's law.

  According to the rotating electrical machine 1 of the present embodiment configured as described above, each phase winding 41 constituting the stator winding 40 is divided into 2n pieces (four in this embodiment), and the extending direction The first partial winding is composed of a first partial winding (a), a second partial winding (b), a third partial winding (c), and a fourth partial winding (d) arranged in order from one end side. The wire (a) and the fourth partial winding (d) are accommodated in different in-phase slots 31 of the stator core 30. Therefore, since the negative mutual inductance can be brought close to 0, as shown in FIG. 7, the resonance frequency is lowered and the resonance peak is lowered as compared with the conventional winding arrangement. Thereby, the resonance between the phases of the stator winding 40 can be reduced. As a result, the maximum interphase voltage is reduced, and the interphase distance necessary for insulation can be shortened.

  In the present embodiment, the second m partial windings that are even-numbered from one end side in the extending direction of each phase winding 41 and the odd (2m-1) partial windings that are odd-numbered before the second m partial winding are provided. Are accommodated in the same in-phase slot 31. That is, the second partial winding (b) and the first partial winding (a) of each phase winding 41 are accommodated in the same in-phase slot 31, and the fourth partial winding (d) and the third partial winding Winding (c) is housed in the same in-phase slot 31. Thus, in combination with the fact that the first partial winding (a) and the fourth partial winding (d) are accommodated in different in-phase slots 31 of the stator core 30, the stator winding 40 The resonance between the phases can be reduced synergistically. As a result, the maximum interphase voltage is further reduced, and the interphase distance required for insulation can be further shortened.

  In addition, the rotating electrical machine 1 of the present embodiment is set so that the alternating current flowing through the stator winding 40 becomes a maximum voltage of 330 V or more between the phase output terminals according to Paschen's law. Therefore, the required spatial distance between conductors for insulation has a positive correlation with the interphase voltage in the region of about 330 V or more, and the necessary interphase distance can be directly reduced by reducing the maximum interphase voltage.

〔test〕
In order to confirm the maximum voltage reduction effect achieved by the present invention, in a rotating electric machine with 12 layers of wave winding specifications in each phase double slot, only the connection part between the partial windings is operated, and the slot insertion of the partial windings is performed. A test was conducted to measure the interphase voltage when the order was changed. As shown in FIG. 8, the phase voltage was measured at a portion where resonance between the phase windings 41 becomes high (for example, a position about ¼ from the output terminal side in the extending direction of the phase winding 41). The actual measurement values are shown in FIG.

  As shown in FIG. 9, the plot line indicated by a → c → d → b (conventional 1) and the plot line indicated by a → d → c → b (conventional 2) This is a case where the wire (a) and the fourth partial winding (d) are accommodated in the same slot. A plot line (invention) indicated by a → b → c → d shows in-phase slots in which the first partial winding (a) and the fourth partial winding (d) are different, as shown in FIG. 8 (b). The connection system is accommodated in U1 and U2 and satisfies the conditions of the present invention.

  It is clear from the graph of FIG. 9 that the fluctuation of the voltage waveform due to resonance is significantly reduced in the connection system according to the present invention. In the case of the conventional connection methods 1 and 2, the maximum voltage is higher than the input voltage, whereas in the case of the connection method of the present invention, the maximum is about 18% of the input voltage. A reduction in voltage is achieved.

[Modification 1]
10A and 10B are explanatory views showing a winding method of each phase winding in Modification Example 1. FIG. 10A is a perspective view seen from obliquely above, and FIG. 10B is a plan view seen from the axial direction. .

  In the first modification, each phase winding 41 constituting the stator winding 40 is not formed by connecting a plurality of conductor segments 50 as in the first embodiment. It is formed by one continuous line 60. In this case, the continuous wire 60 of each phase winding 41 includes a plurality of straight (12) slot accommodating portions (not shown) accommodated in the slots 31 of the stator core 30 and adjacent slot accommodating portions. A plurality of (11) turn portions 62 are alternately connected to each other at one end side and the other end side of the slot accommodating portion. In the continuous line 60, the first slot accommodating portion located on the most end side in the extending direction is accommodated in the innermost layer (first layer) of the slot 31 of the stator core 30, and located on the other end side in the extending direction. The twelfth slot accommodating portion is accommodated in the outermost layer (sixth layer) of the slot 31 of the stator core 30, and is wound by wave winding so as to make the stator core 30 11/8 in the circumferential direction.

  Also in the case of the first modification, the three phase windings 41 (U phase, V phase, W phase) constituting the stator winding 40 are output on one end side in the extending direction, as in the first embodiment. The first partial winding (a) and the second partial winding (2) are divided into 2n pieces (n = 2 to 4 pieces) from the terminal to the neutral point on the other end side and arranged in order from one end side in the extending direction. b), a third partial winding (c), a fourth partial winding (d), and the first partial winding (a) and the fourth partial winding (d) are different in-phase slots of the stator core 30. (See FIGS. 5A and 5B). The winding methods of the first to fourth partial windings (a) to (d) are all wave winding.

  Similarly to the first embodiment, each phase winding 41 includes a second partial winding (b) and a first partial winding (a) housed in the same in-phase slot, and a fourth partial winding. (D) and the 3rd partial coil | winding (c) are accommodated in the same in-phase slot (refer FIG.5 (b)).

  Also in the case of the modified example 1 configured as described above, similarly to the first embodiment, the resonance frequency can be lowered and the resonance peak can be lowered, so that the resonance between the phases of the stator winding 40 can be reduced. Can do. As a result, the maximum interphase voltage can be reduced and the interphase distance required for insulation can be shortened.

[Modification 2]
FIG. 11 is an explanatory view showing a winding method of each phase winding in Modification 2, wherein (a) is a perspective view seen obliquely from above, and (b) is a plan view seen from the axial direction. (C) is a development view developed in the circumferential direction.

  In the second modification, each phase winding 41 constituting the stator winding 40 is formed by connecting a plurality of U-shaped conductor segments 50 by welding as in the first embodiment. Each phase winding 41 of the first embodiment is formed by wave winding, whereas each phase winding 41 of the second modification differs from the first embodiment only in that it is formed by lap winding.

  In this case, as shown in FIG. 11, each phase winding 41 has two slot accommodating portions accommodated in the same in-phase slot 31, and two layers are stacked in each in-phase slot so that the stator core is stacked. 30.

  Also in the case of the second modification, the three phase windings 41 (U phase, V phase, W phase) constituting the stator winding 40 are output on one end side in the extending direction, as in the first embodiment. The first partial winding (a) and the second partial winding (2) are divided into 2n pieces (n = 2 to 4 pieces) from the terminal to the neutral point on the other end side and arranged in order from one end side in the extending direction. b), a third partial winding (c), a fourth partial winding (d), and the first partial winding (a) and the fourth partial winding (d) are different in-phase slots of the stator core 30. (See FIGS. 5A and 5B).

  Similarly to the first embodiment, each phase winding 41 includes a second partial winding (b) and a first partial winding (a) housed in the same in-phase slot, and a fourth partial winding. (D) and the 3rd partial coil | winding (c) are accommodated in the same in-phase slot (refer FIG.5 (b)).

  In the case of the modified example 2 configured as described above, similarly to the first embodiment, the resonance frequency can be lowered and the resonance peak can be lowered, so that the resonance between the phases of the stator winding 40 can be reduced. Can do. As a result, the maximum interphase voltage can be reduced and the interphase distance required for insulation can be shortened.

[Embodiment 2]
FIG. 12 is a connection diagram of each phase winding constituting the stator winding according to the second embodiment. FIG. 13 is an explanatory view showing the accommodation positions in the slots of the first to fourth partial windings constituting the phase windings of the stator winding according to the second embodiment.

  In the rotating electrical machine according to the second embodiment, each phase winding 41 constituting the stator winding 40 has a plurality of j rows (j is a natural number of 2 or more) arranged from each phase terminal 43 to the neutral point 44. Each of the parallel windings 42 is divided into k partial windings from one end to the other end in the extending direction, and the first to k / 2th partial windings and the (k / 2 + 1) th windings. The difference from the first embodiment is that the k-th partial winding is housed in a different in-phase slot 31 of the stator core 30. Therefore, detailed description of members and configurations common to the first embodiment will be omitted, and differences and important points from the first embodiment will be described below. In addition, the same code | symbol is used about the member which is common in Embodiment 1. FIG.

  Since each phase winding 41 constituting the stator winding 40 of the second embodiment is set to j = 2 in the second embodiment, as shown in FIG. 12, from each phase terminal 43 to the neutral point 44. The first and second parallel windings 42-1 and 42-2 are arranged in two rows. The first and second parallel windings 42-1 and 42-2 are divided into four partial windings (k = 4 in the second embodiment) from one end to the other end in the extending direction. That is, the first parallel winding 42-1 includes a first partial winding (1a), a second partial winding (1b), a third partial winding (1c), and a first partial winding arranged in order from the side of each phase terminal 43. It is composed of four partial windings (1d). The second parallel winding 42-2 includes a first partial winding (2a), a second partial winding (2b), a third partial winding (2c), and a second partial winding arranged in order from the phase terminal 43 side. It is composed of four partial windings (2d).

  Since k = 4 in the second embodiment, the first and second parallel windings 42-1 and 42-2 are, as shown in FIG. 13, the first and second partial windings (1a) on the first half side. , 2 a) (1 b, 2 b) and the third and fourth partial windings (1 c, 2 c) (1 d, 2 d) on the rear half side are accommodated in different in-phase slots 31 of the stator core 30. That is, also in the case of the second embodiment, as in the first embodiment, the first partial winding (1a, 2a) and the fourth partial winding (1d, 2d) are placed in different in-phase slots 31 of the stator core 30. Contained. FIG. 13 shows a housing position in the in-phase slot 31 of the two first and second parallel windings 42-1 and 42-2 of the U-phase winding 41 as a representative. The case of the V phase and the W phase is the same as that of the U phase.

  According to the rotating electrical machine of the second embodiment configured as described above, each phase winding 41 constituting the stator winding 40 is configured as described above. Therefore, the magnetic coupling between the first and second partial windings (1a, 2a) (1b, 2b) and the third and fourth partial windings (1c, 2c) (1d, 2d) is weakened and negative mutual inductance is obtained. Therefore, the resonance frequency is lowered and the resonance peak is lowered. Thereby, the resonance between the phases of the stator winding 40 can be reduced, and the interphase distance necessary for insulation can be shortened.

  In the second embodiment, k = 4, but when the value of k is an odd number, the partial winding located in the center is accommodated in the same in-phase slot 31 as the partial winding on the first half side. Alternatively, it may be accommodated in the same in-phase slot 31 as the partial winding on the rear half side.

[Embodiment 3]
FIG. 14 is a connection diagram of each phase winding constituting the stator winding according to the third embodiment. FIG. 15 is a development in the circumferential direction showing a winding method of each phase winding constituting the stator winding according to the third embodiment.

  In the rotating electrical machine according to the third embodiment, each phase winding 41 constituting the stator winding 40 is divided into k partial windings from one end to the other end in the extending direction, and each partial winding 41 is surrounded by This embodiment is different from the first embodiment in that it is configured to repeat the reversal of the winding traveling direction a predetermined number of times each time it is wound in the direction by 360 ° / k. Therefore, detailed description of members and configurations common to the first embodiment will be omitted, and differences and important points from the first embodiment will be described below. In addition, the same code | symbol is used about the member which is common in Embodiment 1. FIG.

  Since each phase winding 41 constituting the stator winding 40 of the third embodiment is k = 2 in the third embodiment, as shown in FIG. Up to the neutral point 44 on the end side is divided into two first and second partial windings (a) and (b). In each phase winding 41, the first and second partial windings (a) and (b) are wound 180 degrees in the circumferential direction, and then the winding direction is reversed so that the stator core is reversed. 30.

  In this case, as shown in FIG. 15, the first partial winding (a) of each phase winding 41 is rotated in a clockwise direction (not shown) from a slot (not shown) serving as a reference (0 °) on each phase terminal 43 side. It is wound so as to reciprocate once by a two-layer lap winding up to a slot (not shown) near the position advanced 180 ° to the right side of FIG. That is, the winding conductors of the first half (a1, indicated by a solid line in FIG. 15) and the latter half (a2, indicated by a broken line in FIG. 15) of the first partial winding (a) are within the above 180 ° range. Two layers are accommodated in an overlapped manner in all slots.

  Further, the second partial winding (b) of each phase winding 41 is a position advanced 180 ° counterclockwise (left side in FIG. 15) from the slot 31 serving as the reference (0 °) on each phase terminal 43 side. It is wound so as to reciprocate once in the vicinity of the slot 31 by two-layer lap winding. That is, the winding conductors of the first half (b1, indicated by a broken line in FIG. 15) and the latter half (b2, indicated by a solid line in FIG. 15) of the second partial winding (b) are within the above 180 ° range. Two layers are accommodated in an overlapped manner in all slots.

  In the third embodiment, each of the first and second partial windings (a) and (b) is wound so as to reverse the winding traveling direction once (reciprocate once) within a 180 ° range. However, the number of reversals in the winding direction (number of reciprocations) may be two or more.

  According to the rotating electrical machine of Embodiment 3 configured as described above, each of the first and second partial windings (a) and (b) divided into two of each phase winding 41 is 180 in the circumferential direction. Each time winding is performed, reversal of the winding traveling direction is repeated a predetermined number of times. As a result, the first and second partial windings (a) and (b) are accommodated in the same slot 31, so the first partial winding (a) and the second partial winding (b) are the same. It is possible to avoid being mixed and accommodated in the slot 31. As a result, the magnetic coupling between the first partial winding (a) and the second partial winding (b) can be weakened, and the reduction of the coil inductance due to the negative mutual inductance can be suppressed. The peak is lowered. Therefore, the resonance between the phases of the stator winding 40 can be reduced, and the interphase distance necessary for insulation can be shortened.

[Comparative Example 1]
FIG. 16 is a circumferential development view showing a winding method of each phase winding constituting the stator winding according to Comparative Example 1.

  In Comparative Example 1 shown in FIG. 16, the stator winding having the same connection structure as that of the stator winding 40 of the third embodiment (see FIG. 14) is formed by two-layer winding and the number of winding conductors per slot is four. Is a general winding method when wound around the stator core 30. In this case, the first partial winding (a) (shown by a solid line in FIG. 16) of each phase winding 41 is clocked from the leading slot (not shown) serving as the reference (0 °) on each phase terminal 43 side. A space between the position advanced 360 ° in the rotation direction (right side in FIG. 16) and the last slot (not shown) is wound in two layers. Further, the second partial winding (b) (shown by a broken line in FIG. 16) of each phase winding 41 is folded back at the last slot by the first partial winding (a) reaching the last slot, The space up to the top slot in the vicinity of the position returned 360 ° in the counterclockwise direction (left side in FIG. 16) is wound in two layers.

  That is, each phase winding 41 wound as in Comparative Example 1 is wound in the first half (a1) of the first partial winding (a) and the second half (b2) of the second partial winding (b). Line conductors are accommodated in a state where two layers overlap each other in all slots within a predetermined range of about 180 °. Further, the winding conductors of the second half (a2) of the first partial winding (a) and the first half (b1) of the second partial winding (b) are 2 in all slots within a predetermined range of about 180 °. It is housed in an overlapping state. Therefore, the first partial winding (a) and the second partial winding (b) of each phase winding 41 have two layers in all slots in a range of about 360 ° that makes one round of the stator core 30 in the circumferential direction. They are housed in an overlapping state.

  That is, in the case of the comparative example 1, the first partial winding (a) and the second partial winding (b) are mixedly accommodated in the same slot. Different. Therefore, in the case of the comparative example 1, it is expected to obtain the effect of reducing the resonance between the phases of the stator windings and the effect of shortening the interphase distance necessary for insulation as in the third embodiment. Can not.

[Embodiment 4]
FIG. 17 is an explanatory view showing the accommodation positions in the slots of the first to fourth partial windings constituting the parallel windings of the stator winding according to the fourth embodiment.

  In the rotating electrical machine according to the fourth embodiment, each phase winding 41 constituting the stator winding 40 includes a plurality of j rows (j is a natural number of 2 or more) arranged from each phase terminal 43 to the neutral point 44. Each of the parallel windings 42 is divided into k partial windings from one end to the other end in the extending direction, and is located at the same position as counted from one end side in the extending direction of each parallel winding 42. The second embodiment is different from the first embodiment in that the partial windings to be arranged are aligned in the same slot 31 so as to be close to each other. Therefore, detailed description of members and configurations common to the first embodiment will be omitted, and differences and important points from the first embodiment will be described below. In addition, the same code | symbol is used about the member which is common in Embodiment 1. FIG.

  Since the respective phase windings 41 constituting the stator winding 40 of the fourth embodiment are set to j = 2 as in the second embodiment, they are arranged in two rows from each phase terminal 43 to the neutral point 44. It comprises two first and second parallel windings 42-1 and 42-2 (see FIG. 12). As in the second embodiment, the first and second parallel windings 42-1 and 42-2 are divided into four (k = 4) partial windings from one end to the other end in the extending direction. That is, the first parallel winding 42-1 includes a first partial winding (1a), a second partial winding (1b), a third partial winding (1c), and a first partial winding arranged in order from the side of each phase terminal 43. It is composed of four partial windings (1d). The second parallel winding 42-2 includes a first partial winding (2a), a second partial winding (2b), a third partial winding (2c), and a second partial winding arranged in order from the phase terminal 43 side. It is composed of four partial windings (2d).

  Since k = 4 in the fourth embodiment, as shown in FIG. 17, the first partial windings (1a, 2a) of the parallel windings 42 and the second partial windings (1b, 2b) are provided. The third partial windings (1c, 2c) and the fourth partial windings (1d, 2d) are arranged close to each other in the slot 31. That is, in the adjacent two in-phase slots 31, the first to fourth partial windings (1a to 1d, 2a to 2d) of each parallel winding 42 are 1a, 2a, 1b, 2b, 1c from the outer peripheral side. , 2c, 1d, 2d. Thereby, in each in-phase slot 31, the front-end | tip part (front half part) and rear-end part (second half part) of each parallel winding 42 are made to go away in radial direction.

  According to the rotating electrical machine of the fourth embodiment configured as described above, the partial windings (1a to 1d, 2a to 2d) positioned at the same position from the one end side in the extending direction of each parallel winding 42 are the same. Since the slots 31 are arranged so as to be close to each other, the magnetic coupling between the first to fourth partial windings (1a to 1d, 2a to 2d) is increased. In other words, the first and second partial windings (1a, 1b, 2a, 2b) in the first half and the third and fourth partial windings (1c, 1d, 2c, 2d) in the second half of each parallel winding 42 are provided. The first and second partial windings (1a, 1b, 2a, 2b) in the first half and the third and fourth partial windings (1c, 1d, 2c, 2d) in the second half are relatively relatively isolated. become weak. As a result, reduction of coil inductance due to negative mutual inductance can be suppressed, so that the resonance frequency is lowered and the resonance peak is lowered. Thereby, the resonance between the phases of the stator winding 40 can be reduced, and the interphase distance necessary for insulation can be shortened.

  In the fourth embodiment, in each in-phase slot 31, the partial windings (1a-1d, 2a-2d) of each parallel winding 42 are 1a, 2a, 1b, 2b, 1c, 2c, 1d from the outer peripheral side. , 2d in this order, but is not limited to this. For example, the partial windings (1a to 1d, 2a to 2d) of each parallel winding 42 may be arranged in the order of 1a, 1b, 2a, 2b, 1c, 1d, 2c, and 2d from the outer peripheral side.

[Embodiment 5]
FIG. 18 is an explanatory view showing the accommodation positions in the slots of the first to fourth partial windings constituting the parallel windings of the stator winding according to the fourth embodiment.

  The rotating electrical machine according to Embodiment 5 is the same as that of Embodiment 4, except that each parallel winding 42 is divided into k partial windings from one end to the other end in the extending direction. / 2) A configuration in which the partial winding and the (k / 2 + 1) to k-th partial windings are accommodated in different in-phase slots 31 of the stator core 30 is added.

  Specifically, since k = 4 in the fourth embodiment, as shown in FIG. 18, the first and second partial windings (1a, 1b, 2a on the first half side of each parallel winding 42 are provided. , 2 b) and the third and fourth partial windings (1 c, 1 d, 2 c, 2 d) on the rear half side are accommodated in different in-phase slots 31 of the stator core 30. That is, in one in-phase slot 31, the first and second partial windings (1a, 1b, 2a, 2b) of each parallel winding 42 are 1a, 2a, 1a, 2a, 1b, 2b from the outer peripheral side. , 1b, 2b in this order. Further, in the other in-phase slot 31, the third and fourth partial windings (1c, 1d, 2c, 2c) of each parallel winding 42 are 1c, 2c, 1c, 2c, 1d, 2d from the outer peripheral side. , 1d, 2d.

  In the fifth embodiment, as in the fourth embodiment, the first partial windings (1a, 2a), the second partial windings (1b, 2b) of the parallel windings 42, the third partial windings are also provided. (1c, 2c) and the fourth partial windings (1d, 2d) are arranged close to each other in the slot 31.

  The rotating electrical machine according to the fifth embodiment is configured as described above, and the other configuration other than the above is the same as that of the fourth embodiment, and thus detailed description thereof is omitted.

  According to the rotating electric machine of the fifth embodiment configured as described above, each parallel winding 42 is on the first and second partial windings (1a, 1b, 2a, 2b) on the first half side and on the second half side. Since the third and fourth partial windings (1c, 1d, 2c, 2d) are accommodated in different in-phase slots 31 of the stator core 30, the first and second partial windings (1a, 1b, 2a, 2b) and the third and fourth partial windings (1c, 1d, 2c, 2d) on the rear half are weakened.

  Furthermore, the parallel windings 42 are arranged so that the partial windings (1a to 1d, 2a to 2d) located at the same position from one end in the extending direction are close to each other in the same slot 31. The partial windings (1a to 1d, 2a to 2d) are also arranged in an isolated state in the partial winding groups on the first half side and the second half side. Therefore, compared with the case where each partial winding (1a-1d, 2a-2d) is mixed in the same in-phase slot 31, the magnetic coupling between each partial winding (1a-1d, 2a-2d) becomes weak. Therefore, the effect of suppressing the reduction in coil inductance due to the negative mutual inductance can be further increased. As a result, an ideal resonance reduction effect between the phases of the stator winding 40 can be obtained.

  Also in the fifth embodiment, when the value of k is an odd number, as in the second embodiment, the partial winding located in the center has the same in-phase slot 31 and the second half as the first half partial winding. It may be accommodated in any in-phase slot 31 of the same in-phase slots 31 as the winding.

[Other Embodiments]
The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

  For example, in the first embodiment, the U-shaped conductor segment 50 is adopted as the basic conductor segment 50 constituting the stator winding 40. However, instead of the U-shaped conductor segment, an I-shaped conductor segment is used. It may be used.

  Further, Embodiment 1 is an example in which the rotating electrical machine according to the present invention is applied to a motor (electric motor). However, the present invention selectively uses an electric motor or a generator as a rotating electrical machine mounted on a vehicle, and further both. The present invention can also be applied to a rotating electrical machine that can be used for the above.

  DESCRIPTION OF SYMBOLS 1 ... Rotary electric machine, 10 ... Housing, 11, 12 ... Bearing, 13 ... Rotating shaft, 14 ... Rotor, 20 ... Stator, 30 ... Stator iron core, 31 ... Slot, 40 ... Stator winding, 41 ... Phase Winding, 42 ... Parallel winding, 42-1 ... First parallel winding, 42-2 ... Second parallel winding, a, 1a, 2a ... First partial winding, b, 1b, 2b ... Second part Winding, c, 1c, 2c ... third partial winding, d, 1d, 2d ... fourth partial winding, 43 ... each phase terminal, 44 ... neutral point, 47 ... first coil end group, 48 ... first 2 coil end groups, 50 ... conductor segment, 51 ... straight part, 52 ... turn part, 53 ... top step part, 54 ... inclined part, 55 ... skew part, 56 ... joint part, 57 ... slot accommodating part, 60 ... continuous line, 62 ... turn part.

Claims (10)

A rotor having a plurality of pairs of magnetic poles arranged in the circumferential direction, a stator core having a plurality of slots arranged in the circumferential direction and arranged radially opposite to the rotor, and inserted into the slots A rotating electric machine comprising: a stator having a stator winding composed of a plurality of phase windings wound around the stator core;
The stator iron core has n (n is a natural number of 2 or more) continuous in the circumferential direction for each of the magnetic poles in the same-phase slot in which the phase winding of the same phase is accommodated
Each of the phase windings is divided into k (k is a natural number of 2 or more) from one end to the other end in the extending direction, and is arranged in order from one end side in the extending direction,. A rotating electrical machine comprising a k-th partial winding, wherein the first partial winding and the k-th partial winding are housed in different in-phase slots of the stator core. In the rotating electrical machine according to claim 1,
Each of the phase windings is divided into 2n pieces from one end to the other end in the extending direction, and the first partial winding, the second partial winding,. A rotating electrical machine comprising a partial winding, wherein the first partial winding and the second n partial winding are accommodated in different in-phase slots of the stator core. In the rotating electrical machine according to claim 1 or 2,
Each of the phase windings includes a second m (m is a natural number satisfying 1 ≦ m ≦ n) partial winding and an (2m−1) partial winding that are evenly positioned from one end side in the extending direction. A rotating electrical machine characterized by being housed in the same in-phase slot of a core. In the rotating electrical machine according to claim 1,
Each of the phase windings includes a plurality of parallel windings arranged in j rows (j is a natural number of 2 or more) from each phase terminal to the neutral point,
Each of the parallel windings is divided into k partial windings from one end to the other end in the extending direction, and the first to k / 2th partial windings and the (k / 2 + 1) th to kth partial windings. The rotating electrical machine is housed in the in-phase slot having a different stator core. A rotor, a stator core having a plurality of slots arranged in the circumferential direction, and arranged radially opposite to the rotor; and a plurality of coils inserted into the slots and wound around the stator core In a rotating electrical machine comprising a stator having a stator winding made of phase windings,
Each of the phase windings is divided into k partial windings from one end to the other in the extending direction, and the reversal of the winding traveling direction is predetermined every time each partial winding is wound 360 ° / k in the circumferential direction. A rotating electric machine characterized by being repeated a number of times. A rotor, a stator core having a plurality of slots arranged in the circumferential direction, and arranged radially opposite to the rotor; and a plurality of coils inserted into the slots and wound around the stator core In a rotating electrical machine comprising a stator having a stator winding made of phase windings,
Each of the phase windings comprises a plurality of parallel windings arranged in j rows from each phase terminal to the neutral point,
Each of the parallel windings is divided into k partial windings from one end to the other end in the extending direction, and the partial windings located at the same position from the one end side in the extending direction of the parallel windings are the same. The rotating electrical machine is arranged so as to be close to each other in the slots. In the rotating electrical machine according to claim 6,
In each of the parallel windings, the first to k / 2th partial windings and the (k / 2 + 1) th to kth partial windings are accommodated in different in-phase slots of the stator core. A rotating electric machine that is characterized. In the rotating electrical machine according to any one of claims 1 to 7,
A rotating electrical machine characterized in that all of the first to kth or second n partial windings are wave-wound. In the rotating electrical machine according to any one of claims 1 to 8,
The stator winding is composed of a plurality of phase windings wound around the stator core with a plurality of conductor segments inserted and arranged in the slot in the axial direction connected in series, and the stator core A first coil end group in which a joint portion in which terminal portions of the conductor segments extending from different slots are joined to each other in the axial direction is periodically arranged in the circumferential direction and in the radial direction. A second coil end group is formed on the other end side in the axial direction of the stator core. The second coil end group includes a plurality of turn portions that connect the slot accommodating portions accommodated in the different slots outside the slot. A rotating electric machine characterized by In the rotating electrical machine according to any one of claims 1 to 9,
The alternating current flowing through the stator winding has a maximum voltage of 330 V or more between the output terminals of each phase.

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