JP2014090614A - Wave winding for three-phase rotary electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wave winding for a three-phase rotary electric machine capable of shortening sheet length of a helically wound sheet-like coil having wave winding configuration and enabling routing compactification.SOLUTION: A wave winding for a three-phase rotary electric machine is formed by laminating a plurality of helically wound sheet-like coils 3, which is wound so that coil conductors are helically connected and form a wave winding configuration, in the sheet thickness direction, and electrically connected to each other. The helically wound sheet-like coils 3 adjacent to each other in the sheet thickness direction are arranged deviated in the movement direction of a movable element magnetic pole, and in-phase phase coils are connected in series between respective helically wound sheet-like coils 3.

Description

  The present invention relates to a wave winding of a three-phase rotating electrical machine.

  As a method for winding a stator winding or a rotor winding of a three-phase rotating electric machine, a wave winding in which a coil conductor is wound in a wave shape is known. As an example of a three-phase rotating electrical machine having a wave winding configuration, a three-phase rotating electrical machine described in Patent Document 1 can be cited. The three-phase rotating electrical machine described in Patent Document 1 has a three-phase wave winding configuration using six coil sides that are spaced apart by one slot pitch, and a series of sheet-like coils is formed. ing. In the three-phase rotating electrical machine described in Patent Document 1, a series of sheet coils are accommodated in the slots of the stator core.

Japanese Patent No. 3952346

  However, in the invention described in Patent Document 1, as the number of conductors accommodated in the slot increases, the sheet length of the sheet-like coil becomes longer, so that the winding operation for forming the sheet-like coil becomes complicated, and the winding is performed. The work space required for the work is increased. In the invention described in Patent Document 1, since a series of sheet-like coils are accommodated in the slots of the stator core, handling of the sheet-like coils becomes complicated. For this reason, the manufacturing time is prolonged and manufacturing defects such as damage to the windings are likely to occur. Furthermore, in the invention described in Patent Document 1, since a series of sheet-like coils are used, the manufacturing equipment such as jigs used for the winding work is enlarged, resulting in an increase in manufacturing cost.

  The present invention has been made in view of such circumstances, and is a three-phase rotating electrical machine that shortens the sheet length of a helically wound sheet-like coil having a wave winding configuration and enables a compact arrangement. It is an object of the present invention to provide a wave winding.

  The wave winding of the three-phase rotating electrical machine according to claim 1 includes a coil side portion alternately inserted into each slot of the stator core, and an end portion on the same side of the coil side portion formed integrally with the coil side portion. A plurality of helically wound sheet-like coils wound in a sheet thickness direction and electrically connected so that a coil conductor having a helical connection is connected in a helical manner and has a wave winding configuration. The helically wound sheet-like coil adjacent to the sheet thickness direction is shifted in the moving direction of the mover magnetic pole, and each helically wound sheet-like coil is a wave winding of a three-phase rotating electrical machine In-phase coils are connected in series.

  The wave winding of the three-phase rotating electric machine according to claim 2 is the wave winding of the three-phase rotating electric machine according to claim 1, wherein the wave winding is the moving direction of the mover magnetic pole and the phase end of the phase coil. The helically wound sheet adjacent to the sheet thickness direction when a direction from one end side of the helically wound sheet coil from which the portion is drawn toward the other end side of the helically wound sheet coil is a layer shift direction inside the sheet The coil-like coils are arranged with an electrical angle shifted by 240 ° in the same direction as the layer shift direction inside the sheet.

  The wave winding of the three-phase rotating electric machine according to claim 3 is the wave winding of the three-phase rotating electric machine according to claim 1, wherein the wave winding is the moving direction of the mover magnetic pole and the phase end of the phase coil. The helically wound sheet adjacent to the sheet thickness direction when a direction from one end side of the helically wound sheet coil from which the portion is drawn toward the other end side of the helically wound sheet coil is a layer shift direction inside the sheet The coil-like coils are arranged with an electrical angle shifted by 120 ° in the direction opposite to the layer shift direction inside the sheet.

  The wave winding of the three-phase rotating electrical machine according to claim 4 includes a coil side portion inserted alternately into each slot of the stator core, and an end portion on the same side of the coil side portion formed integrally with the coil side portion. A plurality of helically wound sheet-like coils wound in a sheet thickness direction and electrically connected so that a coil conductor having a helical connection is connected in a helical manner and has a wave winding configuration. In the wave winding of a three-phase rotating electric machine, each of the helically wound sheet-like coils is arranged so as to be aligned with the moving direction of the mover magnetic pole, and in-phase phase coils are arranged between the helically wound sheet-like coils. Connected in parallel.

  The wave winding of the three-phase rotating electric machine according to claim 5 is the same phase electromagnetic as the phase winding of the three-phase rotating electric machine according to any one of claims 1 to 4. One coil side is selected from each of n types (n is a natural number) of the coil sides having different phases, and the coil sides corresponding to the required number of poles selected are connected in series by the coil ends. A phase unit coil is formed by being connected, and the phase coil is formed by connecting in parallel two phase unit coils having different coil sides selected, and each phase unit coil of the phase coil is The coil side portions are selected so as to include the same number of all the n types of the coil side portions and to have the same number of the coil side portions connected in series.

  The wave winding of the three-phase rotating electric machine according to claim 6 is the wave winding of the three-phase rotating electric machine according to any one of claims 1 to 5, wherein the coil side portion is formed of the stator core. In accordance with the shape of the magnetic pole tooth portion, the cross-sectional shape is changed every turn.

  The wave winding of the three-phase rotating electric machine according to claim 7 is the wave winding of the three-phase rotating electric machine according to any one of claims 1 to 6, wherein the plurality of helically wound sheet-like coils. Among these, the helically wound sheet-like coil close to the slot bottom side of the stator core is an outer peripheral helically wound sheet-like coil, and the helically wound sheet-like coil close to the mover side is an inner peripheral helically wound sheet-like coil When this is done, the outer circumferential side helically wound sheet-like coil and the inner circumferential side helically wound sheet shaped coil have a smaller conductor cross-sectional area than the other helically wound sheet shaped coil.

  The wave winding of the three-phase rotating electric machine according to claim 8 is the wave winding of the three-phase rotating electric machine according to any one of claims 1 to 6, wherein the plurality of helically wound sheet-like coils. Among these, the helically wound sheet-like coil close to the slot bottom side of the stator core is an outer peripheral helically wound sheet-like coil, and the helically wound sheet-like coil close to the mover side is an inner peripheral helically wound sheet-like coil When the outer peripheral side helically wound sheet-like coil is between the coil end and the housing, a heat conducting member is filled, and the conductor cross-sectional area of the coil conductor is equal to the inner circumferential side helically wound sheet-like coil. From the outer peripheral helically wound sheet coil, the helical wound sheet coil gradually becomes smaller.

  In the wave winding of the three-phase rotating electric machine according to claim 1, since a plurality of helically wound sheet-like coils are laminated in the sheet thickness direction, compared with a case where a series of helically wound sheet-like coils are used. Thus, the winding operation of the helically wound sheet-like coil can be simplified, and the manufacturing equipment such as jigs used for the winding operation can be reduced in scale. Moreover, since the sheet length of one helically wound sheet-like coil can be shortened, coil forming and assembly work to the stator core are simplified. Furthermore, since the voltage generated between the coil conductors of the helically wound sheet-like coils adjacent in the sheet thickness direction is smaller than when using a series of helically wound sheet-like coils, the insulating layer of the coil conductor can be made thinner. it can.

  Furthermore, according to the wave winding of the three-phase rotating electrical machine according to claim 1, since the helically wound sheet-like coil adjacent in the sheet thickness direction is arranged shifted in the moving direction of the mover magnetic pole, When phase coils of the same phase are connected in series between the helically wound sheet-like coils, the arrangement for connecting the helically wound sheet-like coils does not intersect. Therefore, the arrangement between the helically wound sheet coils can be made compact, and the three-phase rotating electrical machine can be reduced in size and cost.

  According to the wave winding of the three-phase rotating electric machine according to claim 2, the helically wound sheet-like coil adjacent in the sheet thickness direction is shifted by an electrical angle of 240 ° in the same direction as the layer shift direction inside the sheet. Has been placed. Therefore, when phase coils of the same phase are connected in series between the helical wound sheet coils, the arrangement for connecting the helical wound sheet coils does not intersect. Therefore, the arrangement between the helically wound sheet coils can be made compact, and the three-phase rotating electrical machine can be reduced in size and cost.

  According to the wave winding of the three-phase rotating electrical machine according to claim 3, the helically wound sheet-like coil adjacent in the sheet thickness direction is shifted by 120 ° in electrical direction in the direction opposite to the layer shift direction inside the sheet. Has been placed. Therefore, when phase coils of the same phase are connected in series between the helical wound sheet coils, the arrangement for connecting the helical wound sheet coils does not intersect. Therefore, the arrangement between the helically wound sheet coils can be made compact, and the three-phase rotating electrical machine can be reduced in size and cost.

  According to the wave winding of the three-phase rotating electrical machine according to claim 4, since a plurality of helically wound sheet-like coils are laminated in the sheet thickness direction, a series of helically wound sheet-like coils are used. In comparison, the winding operation of the helically wound sheet-like coil can be simplified, and the manufacturing equipment such as jigs used for the winding operation can be reduced in scale. Moreover, since the sheet length of one helically wound sheet-like coil can be shortened, coil forming and assembly work to the stator core are simplified. Furthermore, since the voltage generated between the coil conductors of the helically wound sheet-like coils adjacent in the sheet thickness direction is smaller than when using a series of helically wound sheet-like coils, the insulating layer of the coil conductor can be made thinner. it can.

  Furthermore, according to the wave winding of the three-phase rotating electrical machine according to claim 4, each helical winding sheet-like coil is arranged in alignment with the moving direction of the mover magnetic pole, so each helical winding sheet-like coil When in-phase coils are connected in parallel, the arrangement for connecting the helical wound sheet coils does not intersect. Therefore, the arrangement between the helically wound sheet coils can be made compact, and the three-phase rotating electrical machine can be reduced in size and cost.

  According to the wave winding of the three-phase rotating electrical machine according to claim 5, each phase unit coil of the phase coil includes the same number of all types of n types of coil sides having the same phase and different electromagnetic phases. And since the coil side part is selected so that the number of coil side parts connected in series may become the same number, the induced voltage which generate | occur | produces in each phase unit coil connected in parallel becomes equal. Therefore, no intra-phase circulating current is generated, so that the output of the three-phase rotating electrical machine can be maintained without lowering the output of the three-phase rotating electrical machine due to the intra-phase circulating current.

  Furthermore, according to the wave winding of the three-phase rotating electric machine according to claim 5, since the phase unit coils are connected in parallel, the wire cross-sectional area of the winding can be halved compared to the case of series connection. Thus, eddy current loss generated in the coil conductor can be reduced. Further, since the force required for forming the coil can be reduced, the formability is improved, the coil can be easily manufactured, and workability such as assembling work to the stator core is improved.

  According to the wave winding of the three-phase rotating electrical machine according to the sixth aspect, the cross-sectional shape of the coil side portion is changed for each turn in accordance with the shape of the magnetic pole tooth portion of the stator core. Therefore, the space factor can be increased, and the three-phase rotating electrical machine can be reduced in size and cost. In the present invention, since the plurality of helically wound sheet-like coils are stacked in the sheet thickness direction, it is easy to change the cross-sectional shape of the coil side portion for each turn.

  According to the wave winding of the three-phase rotating electrical machine according to claim 7, the outer peripheral side helically wound sheet-like coil and the inner peripheral side helically wound sheet-like coil are coil conductors as compared with other helically wound sheet-like coils. Since the conductor cross-sectional area is small, the amount of heat generated by the coil conductor during driving of the three-phase rotating electrical machine is greater than that of other helically wound sheet-like coils. For this reason, for example, when cooling the helically wound sheet-like coil by flowing a cooling medium through the coil end, the amount of heat removed from the outer peripheral helically wound sheet coil and the inner peripheral helically wound sheet coil is high. It is possible to reduce the temperature rise of the coil conductor during driving of the three-phase rotating electric machine. In the present invention, since the plurality of helically wound sheet-like coils are laminated in the sheet thickness direction, it is easy to change the conductor cross-sectional area of the coil conductor for each turn.

  According to the wave winding of the three-phase rotating electrical machine according to claim 8, the conductor cross-sectional area of the coil conductor is different for each helical winding sheet coil from the inner peripheral helical winding sheet coil to the outer peripheral helical winding sheet coil. Accordingly, the amount of heat generated by the coil conductor during driving of the three-phase rotating electrical machine increases from the inner peripheral helically wound sheet coil to the outer peripheral helically wound sheet coil. Therefore, when the helically wound sheet-like coil is cooled via the heat conducting member, the amount of heat removed from the outer peripheral helically wound sheet coil that is in contact with the thermally conducting member and has high cooling efficiency can be increased. The temperature rise of the coil conductor during driving can be reduced. In the present invention, since the plurality of helically wound sheet-like coils are laminated in the sheet thickness direction, it is easy to change the conductor cross-sectional area of the coil conductor for each turn.

It is a schematic diagram which shows the unit coil of 1 phase of a helical winding sheet-like coil concerning 1st Embodiment. It is a schematic diagram which concerns on 1st Embodiment and shows the part for three phases of a helical winding sheet-like coil. It is AA-AA sectional drawing of FIG. It is a schematic diagram which concerns on 1st Embodiment and shows the phase structure of a three-phase rotary electric machine. It is a schematic diagram which shows the connection state in connection with 1st Embodiment in one helical winding sheet-like coil. It is a schematic diagram which shows the connection state between 3 helical winding sheet-like coils concerning 1st Embodiment. It is a schematic diagram which shows the lamination | stacking state of 3 helical winding sheet-like coils concerning 1st Embodiment. FIG. 4 is a partial cross-sectional view illustrating a part of a magnetic pole tooth portion and a coil side portion of a stator core according to the first embodiment. FIG. 3 is a cross-sectional view schematically showing a stator core and a rotor by cutting the three-phase rotating electrical machine in the axial direction according to the first embodiment. It is a schematic diagram which shows the connection state between 3 helical winding sheet-like coils concerning 2nd Embodiment. It is a schematic diagram which concerns on 2nd Embodiment and shows the lamination | stacking state of three helical winding sheet-like coils. It is a schematic diagram which shows the connection state between 3 helical winding sheet-like coils concerning 3rd Embodiment. It is a schematic diagram which concerns on 3rd Embodiment and shows the lamination | stacking state of three helical winding sheet-like coils. It is a schematic diagram which concerns on 4th Embodiment and shows the phase structure of a three-phase rotary electric machine. It is a schematic diagram which shows the connection state in one helical winding sheet-like coil concerning 4th Embodiment. It is a schematic diagram which shows the connection state between three helical winding sheet-like coils concerning 4th Embodiment. It is a schematic diagram which shows the connection state between 3 helical winding sheet-like coils concerning 5th Embodiment. It is a schematic diagram which shows the connection state between 3 helical winding sheet-like coils concerning 6th Embodiment. FIG. 20 is a schematic diagram illustrating a phase configuration of a three-phase rotating electrical machine according to a seventh embodiment. It is a schematic diagram which shows the connection state between 3 helical winding sheet-like coils concerning 7th Embodiment. It is a schematic diagram which shows the connection state between 3 helical winding sheet-like coils concerning 8th Embodiment. It is a schematic diagram which shows the connection state between 3 helical winding sheet-like coils concerning 9th Embodiment. It is a schematic diagram which shows the connection state between 3 helical winding sheet-like coils concerning 10th Embodiment. It is a schematic diagram which shows an example of the connection state of the U-phase coil of the helical winding sheet-like coil which has four types of coil sides per pole.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, about each embodiment, the common code | symbol is attached | subjected to a common location, and the overlapping description is abbreviate | omitted. Each figure is a conceptual diagram and does not define the dimensions of the detailed structure.

<First Embodiment>
As shown in FIG. 7, the wave winding of the three-phase rotating electrical machine of the present embodiment has three helically wound sheet-like coils 3 stacked in the sheet thickness direction, and the helically wound sheet-like coils 3, 3, As shown in FIG. 4, U-phase phase coils 6 </ b> U <b> 1 to 6 </ b> U <b> 3 are connected in series to form a phase coil 6 </ b> U. The same applies to the V phase and the W phase, and the phase coils 6U, 6V, 6W are Y-connected. First, the configuration of the helically wound sheet coil 3 will be described in detail.

  FIG. 1 is a schematic diagram showing a unit coil of one phase of the helically wound sheet coil 3. (B) has shown the state by which the coil conductor was wound by the winding core, (c) has shown the state which removed the winding core in (b). (D) shows the winding state (perspective view from the B side) of the coil conductor on the back side (A side) of the drawing, and (e) shows the winding of the coil conductor on the front side (B side) of the drawing. Indicates the state.

  The solid line in FIG. 1 shows a state in which the coil conductor is wound every six winding pitches (one magnetic pole pitch) from the position of the winding pitch S10. The coil unit 1a indicated by a solid line is wound in the direction from the front side (B side) to the back side (A side) of the drawing sheet at the position of the winding pitch S10, and the winding pitches S10, S16, S22, and S28. In S <b> 34, the coil unit 1 a is formed with a coil side portion 10 a that extends linearly in the short direction of the core (direction perpendicular to the core axis). The coil side portion 10a formed when the coil conductor is wound from the B side toward the A side in FIG. 1 is referred to as a forward conductor portion 11a, and is wound from the A side toward the B side. The formed coil side portion 10a is referred to as a return conductor portion 12a. The same side end portions of the forward conductor portion 11a and the return conductor portion 12a are connected by a coil end portion 20a formed integrally with the coil side portion 10a. The coil end portion 20a is bent at the winding pitches S13, S19, S25, S31 and S37 to form the bent portions 21a.

  As shown in FIG. 1, in this specification, the coil end 20a for the half pole pitch, the forward conductor 11a, the coil end 20a for one pole pitch, the return conductor 12a, and the half pole pitch The coil conductor having the coil end portion 20a is referred to as a coil element 4a. A coil conductor in which the coil elements 4a are arranged and connected in the longitudinal direction (core axis direction) of the core every two magnetic pole pitches is referred to as a coil unit 1a.

  The broken line in FIG. 1 shows a state in which the coil conductor is wound every six winding pitches (one magnetic pole pitch) from the position of the winding pitch S10, similarly to the coil unit 1a indicated by the solid line. The coil unit 1b indicated by the broken line is different from the coil unit 1a indicated by the solid line in that the coil unit 1b is wound in the direction from the back side (A side) to the front side (B side) of the paper surface at the winding pitch S10. The coil unit 1b indicated by a broken line has a coil side portion 10b formed at the winding pitches S10, S16, S22, S28 and S34 in the same manner as the coil unit 1a indicated by a solid line, and the coil side portion 10b is connected to the forward conductor portion 11b. And a return conductor portion 12b. Moreover, the same side edge part of the outgoing conductor part 11b and the return conductor part 12b is connected by the coil end part 20b formed integrally with the coil side part 10b. The coil end portion 20b is bent at winding pitches S13, S19, S25, S31, and S37 to form a bent portion 21b.

  Similar to the coil unit 1a, in this specification, the coil end portion 20b corresponding to the half pole pitch, the forward conductor portion 11b, the coil end portion 20b corresponding to one pole pitch, the return conductor portion 12b, and the half pole pitch portion are used. The coil conductor having the coil end portion 20b is referred to as a coil element 4b. A coil conductor in which the coil elements 4b are arranged and connected in the longitudinal direction (core axis direction) of the core every two magnetic pole pitches is referred to as a coil unit 1b. A coil unit 1a indicated by a solid line and a coil unit 1b indicated by a broken line are paired in the sheet thickness direction.

  When press-molding so that the coil side 10a of the coil unit 1a and the coil side 10b of the coil unit 1b are in close contact with each other in the sheet thickness direction, the coil side 10a and the coil side 10b are Alignment is performed in the longitudinal direction (core axis direction) with two magnetic pole pitches separated over two layers. The coil side portion 10a and the coil side portion 10b formed on the back side (A side) of the paper surface are referred to as the first layer, and the coil side portion 10a and the coil side portion 10b formed on the front side (B side) of the paper surface are the first layers. This is called the second layer. FIGS. 1A and 1F show the cross-layer states of the coil conductors in the first layer and the second layer. In these figures, the layered state of the coil conductor is schematically illustrated so that the portion connecting the layers is the shortest. When the coil units 1a and 1b are attached to the stator core 71, the longitudinal direction (core axis direction) of the core shown in FIG. 1 corresponds to the moving direction of the mover magnetic pole.

  FIG. 2 is a schematic diagram showing three phases of the helically wound sheet coil 3. FIG. 2 corresponds to (a) to (f) of FIG. 1 respectively, and the winding pitch S shown in FIG. 2 corresponds to the winding pitch S shown in FIG. FIG. 3 is a cross-sectional view taken along the line AA-AA in FIG. In the present embodiment, a pair of coil element 4a indicated by a solid line and coil element 4b indicated by a broken line adjacent to each other in the same slot is taken as a pair, and the pair of coil elements 4a and 4b is in the longitudinal direction of the core (core axis Direction). For example, as shown in FIGS. 2 and 3, the coil element 4a is formed between the second layer of the winding pitch S10 and the first layer of the winding pitch S16, and the coil element 4b paired therewith is: It is formed between a first layer having a winding pitch S10 and a second layer having a winding pitch S16. Similarly, a coil element 4a is formed between the second layer of the winding pitch S11 advanced by one winding pitch and the first layer of the winding pitch S17. It is formed between the first layer having the pitch S11 and the second layer having the winding pitch S17.

  In the present embodiment, as shown in FIG. 3, in the moving direction of the mover magnetic pole, the U phase (forward direction U1), U phase (forward direction U2), W phase (reverse direction W1), W phase (reverse direction W2). ), V phase (forward direction V1), V phase (forward direction V2), U phase (reverse direction U1), and U phase (reverse direction U2). In the present embodiment, two in-phase coil units 1a and 1b are adjacent to each other in the moving direction of the mover magnetic pole, and the winding unit of the in-phase coil is four. The in-phase coil units 1a, 1b, 1a, and 1b are connected in series so that the directions of the currents that flow when the three-phase rotating electrical machine is driven match, and a three-phase winding composed of 12 winding units is configured. Yes. As shown in the drawing, adjacent coil sides in the moving direction of the mover magnetic pole are spaced apart by a predetermined interval of 1 W so as to accommodate the magnetic pole teeth of the stator core 71.

  FIG. 4 is a schematic diagram showing a phase configuration of a three-phase rotating electrical machine. In one helically wound sheet-like coil 3, coil units 1a and 1b that are paired in the sheet thickness direction are connected in series at the sheet end portion to form a phase unit coil 5U1. In addition, the coil units 1a and 1b that form a pair in the sheet thickness direction are spaced apart in the moving direction of the mover magnetic pole by one winding pitch with respect to the coil units 1a and 1b constituting the phase unit coil 5U1. The phase unit coil 5U2 is formed in series at the end. The phase unit coils 5U1 and 5U2 are connected in series at the end of the sheet to form the phase coil 6U1.

  In the other two helically wound sheet-like coils 3 and 3, phase coils 6U2 and 6U3 similar to the phase coil 6U1 are formed, and the three phase coils 6U1 to 6U3 start from the U-phase terminal 5TU. The neutral point 5N is connected in series. Note that the three phase coils 6U1 to 6U3 connected in series are referred to as a phase coil 6U, and in the figure, the three phase coils 6U1 to 6U3 are collectively described. The same applies to the V phase and the W phase, and the phase coils 6U, 6V, and 6W are Y-connected.

  FIG. 5 is a schematic diagram showing a connection state in one helically wound sheet-like coil 3. This figure shows a connection state of windings at both ends of the sheet as viewed in the sheet thickness direction. (A)-(c) has shown the connection state for one phase of U phase, V phase, and W phase in order, (d) has shown the connection state for three phases. In the figure, the coil unit 1a is indicated by a solid line and the coil unit 1b is indicated by a broken line, but the coil units 1a and 1b are integrally formed. In addition, the circled numbers in the figure indicate the connection order of the windings from the phase start end to the phase end. Hereinafter, the U phase will be described as an example based on FIG. 5A, but the same applies to the V phase and the W phase.

  The phase unit coil 5U1 is wound in the right direction of the drawing with the U-phase starting end US1 as the starting point (corresponding to the coil unit 1a indicated by the solid line, circled numbers 1 to 4), and then wound back at the coil routing point 5RU1. (Corresponding to the coil unit 1b indicated by a broken line, circled numbers 5 to 8). The phase unit coil 5U2 is wound in the right direction of the paper starting from the connection point 5JU1 with the phase unit coil 5U1 (corresponding to the coil unit 1a, circle numbers 9 to 13), and then wound back at the coil routing point 5RU2. It is wound in the left direction of the paper (corresponding to the coil unit 1b, circled numbers 14 to 18), and is connected to the U-phase terminal unit UE1. The U-phase start end US1 and the U-phase end UE1 are collectively referred to as a U-phase end.

  As shown in the figure, the coil side of the U1 phase and the coil side of the U2 phase are separated by one winding pitch in the moving direction of the mover magnetic pole. Therefore, the induced voltage generated in the phase unit coil 5U1 in which the U1 phase coil units 1a and 1b are connected in series is compared with the induced voltage generated in the phase unit coil 5U2 in which the U2 phase coil units 1a and 1b are connected in series. Although it is in-phase (U phase), the phases are exactly different. In this specification, this is referred to as “electromagnetically different phases”.

  In the present embodiment, the phase winding coils 5U1 and 5U2 having the same phase and different electromagnetic phases are connected in series so that the current directions of the coil side portions located in one magnetic pole match in a full-pitch wave winding configuration. Yes. Therefore, the effect of short winding can be obtained, and torque ripple and the like can be reduced. Moreover, since the coil end portion can be shortened to be compact, leakage reactance can be reduced. Further, the phase unit coils 5U1 and 5U2 are wound around the sheet end portion in the right direction of the drawing, and do not have a connection point at the sheet end portion in the right direction of the drawing. Therefore, compared with the case where coil unit 1a, 1b is connected by the sheet | seat edge part of the paper surface right direction, a coil edge part can be made compact. Note that the coil units 1a and 1b can be connected at the sheet end in the right direction of the paper instead of drawing the winding. In this case, since each end can be connected after coil unit 1a, 1b is wound, manufacture is easy compared with the case where winding is drawn.

  FIG. 6 is a schematic diagram showing a connection state between the three helically wound sheet-like coils 3, 3 and 3. The figure shows the connection state of the windings of the three helically wound sheet-like coils 3, 3, 3 as viewed in the sheet thickness direction. FIG. 7 is a schematic diagram showing a stacked state of three helically wound sheet-like coils 3, 3, 3. (A) is explanatory drawing explaining the layer shift | offset | difference direction inside a sheet | seat, (b) shows the lamination | stacking state in the rotation axis direction view of a three-phase rotary electric machine, (c) is in coil side part direction view. The lamination state is shown. 6 and 7, the three helically wound sheet-like coils 3, 3, and 3 are represented by sheets 1 to 3, and the helically wound sheet-like coils 3 to be stacked are distinguished. In FIG. 6, for convenience of explanation, the three helically wound sheet-like coils 3, 3, 3 are shown shifted in the vertical direction on the paper surface.

  The sheet 1 is the aforementioned helically wound sheet-like coil 3 shown in FIG. The sheet 2 and the sheet 3 are different from the sheet 1 in the order in which the phase end portions are drawn and the arrangement of the mover magnetic poles in the moving direction. As shown in FIG. 6, the phase termination portion of the sheet 1 is drawn out in the order of the W-phase termination portion WE1, the U-phase termination portion UE1, and the V-phase termination portion VE1 in the moving direction of the mover magnetic pole. Correspondingly, the phase start end portion of the sheet 2 is drawn out in the order of the W phase start end portion WS2, the U phase start end portion US2, and the V phase start end portion VS2 in the moving direction of the mover magnetic pole.

  The W-phase end portion WE1 of the sheet 1 and the W-phase start end portion WS2 of the sheet 2 are electrically connected by a W-phase connecting wire WC1, and the U-phase end portion UE1 of the sheet 1 and the U-phase start end portion US2 of the sheet 2 Are electrically connected by a U-phase crossover line UC1. The V-phase terminal portion VE1 of the sheet 1 and the V-phase start end portion VS2 of the sheet 2 are electrically connected by a V-phase connecting line VC1. Similarly, between the sheet 2 and the sheet 3, the phase ends of the same phase are electrically connected by the V-phase connecting line VC2, the W-phase connecting line WC2, and the U-phase connecting line UC2. Note that the U-phase termination unit UE3, the V-phase termination unit VE3, and the W-phase termination unit WE3 of the sheet 3 are grouped as a neutral point 5N.

  As shown in FIG. 6 and FIGS. 7B and 7C, the sheet 2 is arranged with an electrical angle of 240 ° in the same direction as the layer shift direction inside the sheet with respect to the sheet 1, 3 is arranged with respect to the sheet 2 by being shifted by an electrical angle of 240 ° in the same direction as the layer shifting direction inside the sheet. By bringing both end portions of each helically wound sheet-like coil 3 close to each other, the three helically wound sheet-like coils 3, 3, 3 to be stacked are concentric cylindrical. Here, the layer misalignment direction inside the sheet is the moving direction of the mover magnetic pole, and the helically wound sheet shape from one end side of the helically wound sheet coil 3 from which the phase end portions of the phase coils 6U, 6V, 6W are drawn. The direction toward the other end side of the coil 3 is said. As described above, the coil sides 10a and 10b of the helically wound sheet-like coil 3 are formed in two layers in the sheet thickness direction. FIG. 7A schematically shows that the layer in which the winding is wound is shifted in the moving direction of the mover magnetic pole with respect to the layer from which the phase end portion (phase start end portion and phase end portion) is drawn. It is shown in.

  In the present embodiment, the helically wound sheet-like coils 3, 3, 3 adjacent in the sheet thickness direction are arranged with an electrical angle shifted by 240 ° in the same direction as the layer shift direction inside the sheet. Therefore, when the phase coils 6U1 to 6U3, 6V1 to 6V3, and 6W1 to 6W3 having the same phase are connected in series between the helically wound sheet-like coils 3, the arrangement for connecting the helically wound sheet-like coils 3 and 3 and 3 is connected. (U-phase crossover lines UC1, UC2, V-phase crossover lines VC1, VC2, W-phase crossover lines WC1, WC2) do not intersect. Therefore, the arrangement between the helically wound sheet-like coils 3, 3 and 3 can be made compact, and the three-phase rotating electrical machine can be reduced in size and cost.

  Further, since the three helically wound sheet-like coils 3, 3, and 3 are laminated in the sheet thickness direction, the helically wound sheet-like coil 3 is wound as compared with the case where a series of helically wound sheet-like coils 3 are used. The mounting operation can be simplified, and the manufacturing equipment such as jigs used for the winding operation can be reduced in size. In addition, since the sheet length of one helically wound sheet-like coil 3 can be shortened, coil forming and assembly work to the stator core 71 are simplified. Furthermore, since the voltage generated between the coil conductors of the helically wound sheet-like coil 3 adjacent in the sheet thickness direction is smaller than when a series of helically wound sheet-like coils 3 is used, the insulating layer of the coil conductor is made thin. be able to.

  Next, the winding (also referred to as a coil conductor) of the helically wound sheet-like coil 3 will be described. The surface of the winding is covered with an insulating layer such as enamel. The cross-sectional shape of the winding is not particularly limited, and can be an arbitrary cross-sectional shape. For example, windings having various cross-sectional shapes such as a circular wire having a circular cross-section and a polygonal cross-sectional square line can be used. Moreover, the parallel thin wire | line which combined several thin wire | winding strand may be sufficient. When parallel thin wires are used, eddy current loss generated in the windings can be reduced as compared with the case of single wires, and the efficiency of the three-phase rotating electrical machine is improved. Moreover, since the force required for coil forming can be reduced, the moldability is improved and the coil can be manufactured easily.

  In the present embodiment, the coil side portions 10 a and 10 b are changed in cross-sectional shape for each turn in accordance with the shape of the magnetic pole tooth portion 40 of the stator core 71. FIG. 8 is a partial cross-sectional view showing a part of the magnetic pole tooth portion 40 and the coil side portions 10 a and 10 b of the stator core 71. (A) shows the case where the cross-sectional shape of coil side part 10a, 10b is a rectangle, (b) has shown the case where the cross-sectional shape of coil side part 10a, 10b is trapezoid. This figure shows a state in which the helically wound sheet-like coils 3, 3, 3 are attached to the slots forming the parallel magnetic poles, and in accordance with the shape of the magnetic pole teeth 40 of the stator core 71 based on an equal cross-sectional area. The cross-sectional shape of the coil side portions 10a and 10b is changed for each turn.

  The cross-sectional shape of the coil side portions 10a and 10b can be any shape including a rectangle and a trapezoid shown in FIG. When using parallel thin wires for the windings, the arrangement of the thin wires can be changed in accordance with the shape of the magnetic pole tooth portion 40. The helically wound sheet-like coil 3 is formed in two layers (two coil side portions 10a and 10b) in the sheet thickness direction, but the cross-sectional shapes of the two coil side portions 10a and 10b are substantially the same. As an alternative, the cross-sectional shape of the coil side portions 10a, 10b may be changed for each turn of the helically wound sheet-like coil 3.

  In the present embodiment, the coil side portions 10 a and 10 b are changed in cross-sectional shape for each turn in accordance with the shape of the magnetic pole tooth portion 40 of the stator core 71. Therefore, the space factor can be increased, and the three-phase rotating electrical machine can be reduced in size and cost. Moreover, in this embodiment, since the three helically wound sheet-like coils 3, 3, and 3 are laminated | stacked on the sheet | seat thickness direction, it is easy to change the cross-sectional shape of coil side part 10a, 10b for every turn. It is.

  In addition to the cross-sectional shape of the coil side portions 10a and 10b, the coil side pitch of the coil side portions 10a and 10b and the height of the coil end portions 20a and 20b can be changed for each turn. You can also. The coil side pitch refers to the distance between the one-phase forward conductor portion 11a and the return conductor portion 12a wound or the distance between the one-phase forward conductor portion 11b and the return conductor portion 12b. The heights of the coil end portions 20a and 20b are the distance from the bent portion 21a of the coil end portion 20a to the straight line connecting the same side end portions of the forward conductor portion 11a and the return conductor portion 12a, or the winding of the coil end portion 20b. The distance from the bent portion 21b to the straight line connecting the end portions on the same side of the forward conductor portion 11b and the return conductor portion 12b. By forming the coil side pitch or the height of the coil end portions 20a and 20b in accordance with the circumference of the round, the sheet length of the helically wound sheet-like coil 3 can be made appropriate for each round. Moreover, since adjustment can be performed according to the assembly work to the stator core 71, the three-phase rotating electrical machine can be reduced in size and cost.

  In the present embodiment, the conductor cross-sectional area of the coil conductor can be changed in accordance with the cooling method of the three helically wound sheet-like coils 3, 3 and 3. In this case, the conductor cross-sectional area of the coil conductor is changed for each of the three helically wound sheet-like coils 3, 3, 3, and the phase unit coils 5 U 1, 5 U 2, 5 V 1, 5 V 2, 5 W 1 in one helically wound sheet-like coil 3. It is assumed that the conductor cross-sectional areas of the 5W2 coil conductors are substantially equal. FIG. 9 is a cross-sectional view schematically showing the stator core 71 and the rotor 72 by cutting the three-phase rotating electrical machine in the axial direction. (A) shows the case where the cooling medium is circulated to the coil end portions 20 a and 20 b to cool the three helically wound sheet-like coils 3, 3 and 3, and (b) shows through the heat conducting member 75. 3 shows a case where the three helically wound sheet coils 3, 3 and 3 are cooled. As shown in the figure, a stator core 71 is disposed opposite to a rotor 72 in a housing 70 of a three-phase rotating electrical machine. A shaft 74 (rotating shaft) is provided through the rotor 72, and the rotor 72 and the shaft 74 are pivotally supported on the housing 70 via a bearing 73. Of the three helically wound sheet-like coils 3, 3, 3 (sheets 1 to 3), the helically wound sheet-like coil 3 (sheet 1) close to the slot bottom side of the stator core 71 is arranged on the outer peripheral helically wound sheet shape. The helically wound sheet-like coil 3 (sheet 3) close to the rotor 72 side (mover side) is referred to as the inner circumferential helically wound sheet coil 32 (sheet 3).

  First, consider a case where the cooling medium is circulated through the coil end portions 20a, 20b to cool the three helically wound sheet-like coils 3, 3, 3. As shown in FIG. 5A, when a cooling medium (for example, a coolant such as oil, air, nitrogen, etc.) is circulated through the coil ends 20a, 20b, a helically wound sheet shape at the time of driving the three-phase rotating electric machine The heat generated from the coils 3, 3, 3 is extracted through the cooling medium and the stator core 71. Therefore, the outer peripheral side helically wound sheet coil 31 (sheet 1) and the inner peripheral side helically wound sheet coil 32 (sheet 3) having a large area in contact with the cooling medium have a small area in contact with the cooling medium. Compared to (Sheet 2), the cooling efficiency is high.

  Therefore, the outer circumferential side helically wound sheet coil 31 (sheet 1) and the inner circumferential side helically wound sheet coil 32 (sheet 3) have a conductor cross-sectional area of the coil conductor as compared with the helically wound sheet shaped coil 3 (sheet 2). It is preferable that it is small. In this case, the outer peripheral side helical winding sheet coil 31 (sheet 1) and the inner peripheral side helical winding sheet coil 32 (sheet 3) are compared with the helical winding sheet coil 3 (sheet 2) of the three-phase rotating electric machine. The amount of heat generated by the coil conductor during driving increases. Therefore, the heat removal amount of the outer peripheral side helically wound sheet coil 31 (sheet 1) and the inner peripheral side helically wound sheet coil 32 (sheet 3) with high cooling efficiency can be increased, and at the time of driving the three-phase rotating electrical machine The temperature rise of the coil conductor can be reduced. Further, as a utilization method for reducing the conductor cross-sectional area of the coil conductor, it is possible to increase the conductor cross-sectional area of the coil conductor having low cooling efficiency, reduce the heat generation amount of the coil conductor, and reduce the temperature distribution peak. The output torque of the three-phase rotating electrical machine can be increased by reducing the slot depth and increasing the rotor diameter.

  Next, consider the case of cooling the three helically wound sheet-like coils 3, 3, 3 via the heat conducting member 75. As shown in FIG. 4B, a heat conductive member 75 (for example, resin) is filled between the coil ends 20a and 20b of the outer peripheral helically wound sheet-like coil 31 (sheet 1) and the housing 70. Has been. Therefore, the heat generated from the helically wound sheet-like coils 3, 3, 3 when driving the three-phase rotating electrical machine is removed through the heat conducting member 75 and the stator core 71. Therefore, the outer peripheral helically wound sheet-like coil 31 (sheet 1) in contact with the heat conducting member 75 has higher cooling efficiency than the adjacent helically wound sheet-like coil 3 (seat 2), and the helically wound sheet-like coil 3 ( The cooling efficiency decreases in the order of the sheet 2) and the inner circumferential helically wound sheet coil 32 (sheet 3).

  Therefore, the conductor cross-sectional area of the coil conductors of the three helically wound sheet-like coils 3, 3 and 3 is changed from the inner peripheral helically wound sheet coil 32 (sheet 3) to the outer peripherally helically wound sheet coil 31 (sheet 1). It is preferable that the helical winding sheet-like coil 3 is gradually reduced in size. In this case, the amount of heat generated by the coil conductor during driving of the three-phase rotating electrical machine increases from the inner peripheral helically wound sheet coil 32 (sheet 3) to the outer peripheral helically wound sheet coil 31 (sheet 1). Therefore, the heat removal amount of the outer peripheral helically wound sheet coil 31 (sheet 1) with high cooling efficiency can be increased, and the temperature rise of the coil conductor during driving of the three-phase rotating electrical machine can be reduced. Further, as an application method for reducing the conductor cross-sectional area of the coil conductor, the output torque of the three-phase rotating electrical machine can be increased by reducing the slot depth and increasing the rotor diameter. The output torque of the three-phase rotating electrical machine can be increased by increasing the magnetic pole width of the stator core 71 and relaxing the magnetic saturation of the magnetic poles. In this embodiment, since the three helically wound sheet-like coils 3, 3, 3 are laminated in the sheet thickness direction, the conductor cross-sectional area of the coil conductor is changed for each turn in any cooling method. Easy to do.

  Next, the winding method and mounting method of the helically wound sheet-like coil 3 will be described. The coil units 1a and 1b can be formed, for example, by winding a winding around a winding core in a helical shape. One winding may be wound around the core or a plurality of windings may be wound simultaneously. In order to secure the winding pitch S, a pin, a groove, or the like may be provided on the core, and the winding may be performed using the pin or groove as a guide. Then, as shown in FIG. 2, after winding all the windings, the core is removed from the windings, and the coil side portions 10a, 10b forming the pair of coil units 1a, 1b are in close contact with each other in the direction perpendicular to the paper surface. Press to form. In consideration of the case where the winding is damaged during pressure molding, a resin coating for repair may be applied after pressure molding.

  The three helically wound sheet-like coils 3, 3, 3 can be attached to the annular stator core 71 for each helically wound sheet-like coil 3. Further, the wave winding of the three-phase rotating electrical machine of this embodiment can be rolled into an annular shape after the three helically wound sheet-like coils 3, 3, 3 are stacked in each slot of the stator core 71. Therefore, it is possible to manufacture a cylindrical stator by attaching the three helically wound sheet-like coils 3, 3, 3 to a development core obtained by developing the stator core 71 in a planar shape, and rounding the whole into an annular shape. When the stator core 71 uses a split core that is divided in the circumferential direction, only the three helically wound sheet-like coils 3, 3, 3 are rolled into an annular shape, and the three helical windings are rolled into an annular shape. A split core can also be attached from the outer peripheral side of the sheet-like coils 3, 3 and 3. Finally, the winding is fixed to the stator core 71 by varnish impregnation, resin molding or the like. The wave winding of the three-phase rotating electric machine of the present embodiment can be used as a radial cylindrical rotating electric machine in which the rotor and the stator are arranged concentrically in the radial direction.

Second Embodiment
This embodiment differs from the first embodiment in the arrangement of the mover magnetic poles in the moving direction of the three helically wound sheet-like coils 3, 3, 3. FIG. 10 is a schematic diagram showing a connection state between the three helically wound sheet-like coils 3, 3 and 3. This figure shows the connection state of the windings of the three helically wound sheet-like coils 3, 3, 3 (sheets 1 to 3) as viewed in the sheet thickness direction. The sheet-like coils 3, 3, 3 are described while being shifted in the vertical direction on the paper surface. FIG. 11 is a schematic diagram showing a stacked state of three helically wound sheet-like coils 3, 3 and 3. (A) has shown the lamination | stacking state in the rotating shaft direction view of a three-phase rotary electric machine, (b) has shown the lamination | stacking state in coil side part direction view.

  As shown in FIGS. 10 and 11, the sheet 2 is arranged with an electrical angle of 120 ° shifted from the sheet 1 in the direction opposite to the layer shift direction inside the sheet, and the sheet 3 is positioned with respect to the sheet 2. Thus, the electrical angle is shifted by 120 ° in the direction opposite to the layer shift direction inside the sheet. That is, in this embodiment, the helically wound sheet-like coils 3, 3, 3 adjacent to each other in the sheet thickness direction are arranged with an electrical angle shifted by 120 ° in the direction opposite to the layer shift direction inside the sheet. Also in this case, when the same phase coils 6U1 to 6U3, 6V1 to 6V3, and 6W1 to 6W3 are connected in series between the helical wound sheet coils 3, the helical wound sheet coils 3 and 3 are connected. The routings (U-phase crossover lines UC1, UC2, V-phase crossover lines VC1, VC2, W-phase crossover lines WC1, WC2) do not intersect. Therefore, the arrangement between the helically wound sheet-like coils 3, 3 and 3 can be made compact, and the three-phase rotating electrical machine can be reduced in size and cost.

<Third Embodiment>
This embodiment differs from the first embodiment in the arrangement of the mover magnetic poles in the moving direction of the three helically wound sheet-like coils 3, 3, 3. FIG. 12 is a schematic diagram showing a connection state between the three helically wound sheet-like coils 3, 3 and 3. This figure shows the connection state of the windings of the three helically wound sheet-like coils 3, 3, 3 (sheets 1 to 3) as viewed in the sheet thickness direction. The sheet-like coils 3, 3, 3 are described while being shifted in the vertical direction on the paper surface. FIG. 13 is a schematic diagram showing a stacked state of three helically wound sheet-like coils 3, 3, 3. (A) has shown the lamination | stacking state in the rotating shaft direction view of a three-phase rotary electric machine, (b) has shown the lamination | stacking state in coil side part direction view.

  As shown in FIGS. 12 and 13, the sheet 2 is arranged with an electrical angle of 240 ° with respect to the sheet 1 in the same direction as the layer shift direction inside the sheet, and the sheet 3 is arranged with respect to the sheet 2. Thus, the electrical angle is shifted by 120 ° in the direction opposite to the layer shift direction inside the sheet. That is, this embodiment can be said to be an embodiment in which the first embodiment and the second embodiment are combined. Also in this case, when the same phase coils 6U1 to 6U3, 6V1 to 6V3, and 6W1 to 6W3 are connected in series between the helical wound sheet coils 3, the helical wound sheet coils 3 and 3 are connected. The routings (U-phase crossover lines UC1, UC2, V-phase crossover lines VC1, VC2, W-phase crossover lines WC1, WC2) do not intersect. Therefore, the arrangement between the helically wound sheet-like coils 3, 3 and 3 can be made compact, and the three-phase rotating electrical machine can be reduced in size and cost.

<Fourth embodiment>
This embodiment differs in the structure of the helical winding sheet-like coil 3 compared with 1st Embodiment. Specifically, in the helically wound sheet-like coil 3, phase unit coils 5U1 and 5U2 having different configurations compared to the first embodiment are connected in parallel to form a phase coil 6U1. The same applies to the phase coils 6U2 and 6U3. Hereinafter, the U phase will be described as an example, but the same applies to the V phase and the W phase.

  As shown in FIG. 5, the U1 phase coil side and the U2 phase coil side are separated by one winding pitch in the moving direction of the mover magnetic pole, so that the U1 phase coil units 1a and 1b The U2-phase coil units 1a and 1b are separated by one winding pitch in the moving direction of the mover magnetic pole. Temporarily, U1-phase coil units 1a, 1b are connected in series to form phase unit coil 5U1, U2-phase coil units 1a, 1b are connected in series to form phase unit coil 5U2, and phase unit coils 5U1, 5U2 are connected. Are connected in parallel to form the phase coil 6U1. In this case, since the phase unit coils 5U1 and 5U2 are separated by one winding pitch in the moving direction of the mover magnetic pole, the induced voltage generated in the phase unit coils 5U1 and 5U2 is in phase (U phase). To be precise, the phase is different. Therefore, the induced voltages generated in the phase unit coils 5U1 and 5U2 are different, and an in-phase circulating current is generated to reduce the output of the three-phase rotating electrical machine.

  FIG. 14 is a schematic diagram showing a phase configuration of a three-phase rotating electrical machine. In the present embodiment, a U1-phase coil unit 1a and a U2-phase coil unit 1b are connected in series to form a phase unit coil 5U1. The U2-phase coil unit 1a and the U1-phase coil unit 1b are connected in series to form a phase unit coil 5U2. Phase unit coils 5U1 and 5U2 are connected in parallel to form phase coil 6U1. In the other two helically wound sheet-like coils 3 and 3, phase coils 6U2 and 6U3 similar to the phase coil 6U1 are formed, and the three phase coils 6U1 to 6U3 start from the U-phase terminal 5TU. The neutral point 5N is connected in series. Note that the three phase coils 6U1 to 6U3 connected in series are referred to as a phase coil 6U, and in the figure, the three phase coils 6U1 to 6U3 are collectively described. The same applies to the V phase and the W phase, and the phase coils 6U, 6V, and 6W are Y-connected.

  In the present embodiment, an induced voltage generated in the phase unit coils 5U1 and 5U2 will be considered. For example, it is assumed that the induced voltage generated at the U1 phase coil side at a predetermined time is higher than the induced voltage generated at the U2 phase coil side. In the present embodiment, a U1-phase coil unit 1a having a relatively high induced voltage and a U2-phase coil unit 1b having a relatively low induced voltage are connected in series to form a phase unit coil 5U1. The U2-phase coil unit 1a having a relatively low induced voltage and the U1-phase coil unit 1b having a relatively high induced voltage are connected in series to form a phase unit coil 5U2. Therefore, if the induced voltage generated between the winding ends of the phase unit coil 5U1 is 5E1, and the induced voltage generated between the winding ends of the phase unit coil 5U2 is 5E2, the induced voltages 5E1, 5E2 are equal. There is no circulating current in the U phase. Therefore, the output of the three-phase rotating electric machine can be maintained without the output of the three-phase rotating electric machine being reduced by the intra-phase circulating current. The same applies to the case where the induced voltage generated at the coil side of the U1 phase is lower than the induced voltage generated at the coil side of the U2 phase, and the same applies to the V phase and the W phase.

  In this embodiment, the circumferential length (sheet length) of the phase unit coils 5U1, 5U2, 5V1, 5V2, 5W1, and 5W2 is the same as the circumferential length of the stator. Therefore, for example, even when the field magnetic flux varies due to the eccentricity of the rotor 72, the phase coils 6U, 6V, 6W generate substantially equal induced voltages having a phase difference of 120 ° in electrical angle in phase order. To do. Therefore, the output of the three-phase rotating electrical machine can be maintained without lowering the output of the three-phase rotating electrical machine due to the internal circulation current between the phases. In addition, the circumferential winding length (sheet length) of the phase unit coils 5U1, 5U2, 5V1, 5V2, 5W1, 5W2 can also be a wave winding configuration of a stator circumferential multiple that is a natural number multiple of the circumferential length of the stator. In this case, the same effect can be obtained.

  Furthermore, in this embodiment, since the phase unit coils 5U1 and 5U2 are connected in parallel, the wire cross-sectional area of the winding can be halved compared to the case of series connection, and eddy currents generated in the coil conductor portion Loss can be reduced. Further, since the force required for forming the coil can be reduced, the formability is improved, the coil can be easily manufactured, and workability such as assembling work to the stator core 71 is also improved. The same applies to the V phase and the W phase.

  FIG. 15 is a schematic diagram showing a connection state in one helically wound sheet-like coil 3. This figure shows a connection state of windings at both ends of the sheet as viewed in the sheet thickness direction. (A)-(c) has shown the connection state for one phase of U phase, V phase, and W phase in order, (d) has shown the connection state for three phases. In the figure, the coil unit 1a is indicated by a solid line and the coil unit 1b is indicated by a broken line, but the coil units 1a and 1b are integrally formed. In addition, the circled numbers in the figure indicate the connection order of the windings from the phase start end to the phase end. Since the phase unit coils 5U1 and 5U2 are connected in parallel, for convenience of explanation, the connection order of the windings of the phase unit coil 5U1 is indicated by a circle number starting from 1 and the connection order of the windings of the phase unit coil 5U2 is indicated. Circle numbers starting from 100 are shown. Hereinafter, the U phase will be described as an example based on FIG. 5A, but the same applies to the V phase and the W phase.

  The phase unit coil 5U1 is wound in the right direction of the drawing with the U-phase start end US1 as the starting point (corresponding to the U1-phase coil unit 1a indicated by the solid line, circled numbers 1 to 4), and then at the coil routing point 5RU1. It is wound back and wound in the left direction of the paper (corresponding to the U2-phase coil unit 1b indicated by a broken line, circled numbers 5 to 9), and is connected to the U-phase terminal unit UE1. The phase unit coil 5U2 is wound in the right direction of the drawing with the U-phase start end US1 as the starting point (corresponding to the U2-phase coil unit 1a indicated by the solid line, round numerals 100 to 104), and then at the coil routing point 5RU2. It is wound back and wound in the left direction of the paper (corresponding to the U1-phase coil unit 1b indicated by a broken line, round numerals 105 to 109), and is connected to the U-phase terminal unit UE1. And the phase unit coil 5U1 and the phase unit coil 5U2 are connected in parallel, and the phase coil 6U1 is formed.

  As shown in FIG. 5A, when the coil end height from the slot accommodating portion of the stator core 71 to the coil routing points 5RU1 and 5RU2 is 5H1 and 5H2, respectively, the coil end height 5H2 is the coil end height. Since the height is lower than the part height 5H1, the windings in the same phase in the vicinity of the coil routing points 5RU1 and 5RU2 do not intersect in the sheet thickness direction or the coil side part direction. That is, in-phase coil ends that change the coil side portions are not stacked in the sheet thickness direction, so that the coil end portion that changes the coil side portions can be made compact. Furthermore, since the coil end of the same phase for switching the coil side is arranged in parallel to the moving direction of the mover magnetic pole and shifted in the coil side direction, the coil end for switching the coil side The coil side direction height can be made substantially the same as the other coil end portions. Therefore, the coil side portion height in the coil end portion can be made uniform.

  In the first embodiment, as shown in FIG. 5 (d), the phase start end (U-phase start end US1, V-phase start end VS1, W-phase start end WS1), phase termination (U-phase termination UE1). V-phase termination portion VE1, W-phase termination portion WE1) and connection points 5JU1, 5JV1, and 5JW1 are close to each other. In order to avoid them from interfering with each other, a space for routing in the same phase or between phases is required. On the other hand, in the present embodiment, as shown in FIG. 15 (d), the two phase unit coils 5U1 and 5U2 are connected in parallel to form the phase coil 6U. The wiring does not become complicated by crossing. The same applies to the V-phase and the W-phase, and this embodiment can reduce the arrangement in the helically wound sheet-like coil 3 compared to the first embodiment, and the helically wound sheet from which the phase end portion is drawn out. The sheet end of the coil 3 can be made compact.

  FIG. 16 is a schematic diagram showing a connection state between the three helically wound sheet-like coils 3, 3 and 3. This figure shows the connection state of the windings of the three helically wound sheet-like coils 3, 3, 3 (sheets 1 to 3) as viewed in the sheet thickness direction. The sheet-like coils 3, 3, 3 are described while being shifted in the vertical direction on the paper surface. As shown in the figure, the connection state between the three helically wound sheet-like coils 3, 3 and 3 and the arrangement of the mover magnetic poles in the moving direction are the same as in the first embodiment. That is, the helically wound sheet-like coils 3, 3, and 3 adjacent to each other in the sheet thickness direction are arranged so as to be shifted by an electrical angle of 240 ° in the same direction as the layer shift direction inside the sheet. Therefore, when the phase coils 6U1 to 6U3, 6V1 to 6V3, and 6W1 to 6W3 having the same phase are connected in series between the helically wound sheet-like coils 3, the arrangement for connecting the helically wound sheet-like coils 3 and 3 and 3 is connected. (U-phase crossover lines UC1, UC2, V-phase crossover lines VC1, VC2, W-phase crossover lines WC1, WC2) do not intersect. Therefore, the arrangement between the helically wound sheet-like coils 3, 3 and 3 can be made compact, and the three-phase rotating electrical machine can be reduced in size and cost.

  Note that, as shown in the second embodiment, the sheet 2 is arranged with respect to the sheet 1 by being shifted by an electrical angle of 120 ° in the direction opposite to the layer displacement direction inside the sheet, and the sheet 3 is arranged with respect to the sheet 2. Further, it can be arranged by shifting the electrical angle by 120 ° in the direction opposite to the layer shift direction inside the sheet. In addition, as shown in the third embodiment, the sheet 2 is arranged with an electrical angle of 240 ° with respect to the sheet 1 in the same direction as the layer displacement direction inside the sheet, and the sheet 3 is arranged with respect to the sheet 2. Further, it can be arranged by shifting the electrical angle by 120 ° in the direction opposite to the layer shift direction inside the sheet.

<Fifth Embodiment>
Compared with the first embodiment, the present embodiment uses the same type of three helically wound sheet-like coils 3, 3, and 3, and between the helically wound sheet-like coils 3, the phase coils 6 U and 6 V are in phase. , 6W is different in that it is connected in parallel. Furthermore, this embodiment differs in arrangement | positioning in the moving direction of the needle | mover magnetic pole of the three helical winding sheet-like coils 3, 3, and 3 compared with 1st Embodiment. FIG. 17 is a schematic diagram showing a connection state between the three helically wound sheet-like coils 3, 3 and 3. (A) shows the case where the neutral point 5N is provided for each of the helically wound sheet-like coils 3, 3, 3, and (b) shows each of the three helically wound sheet-like coils 3, 3, 3. The case where the sex points 5N are integrated is shown. The figure shows the connection state of the windings in the sheet thickness direction view of the three helically wound sheet-like coils 3, 3, 3 (sheets 1 to 3). Only the connection of 12 coil sides is shown.

  In this embodiment, three helical winding sheet-like coils 3 (sheets 1) described in the first embodiment are used. And, as shown in the figure, the U-phase start ends US1, US2, US3 of the sheets 1 to 3 are electrically connected by the U-phase crossover line UC3, and the V-phase start ends VS1, of the sheets 1 to 3, VS2 and VS3 are electrically connected by a V-phase crossover line VC3. The W-phase start ends WS1, WS2, WS3 of the sheets 1 to 3 are electrically connected by a W-phase crossover line WC3. The three helically wound sheet-like coils 3, 3 and 3 are of the same type, but are represented by sheets 1 to 3 in FIG.

  When the neutral point 5N is provided for each of the helically wound sheet-like coils 3, 3 and 3, as shown in FIG. 5A, in the sheet 1, the U-phase termination portion UE1, the V-phase termination portion VE1, W The phase termination WE1 is grouped as a neutral point 5N. Similarly, in the sheet 2, the U-phase termination unit UE2, the V-phase termination unit VE2, and the W-phase termination unit WE2 are grouped as a neutral point 5N. In the sheet 3, the U-phase termination unit UE3 and the V-phase termination unit WE2 VE3 and the W-phase terminal portion WE3 are grouped as a neutral point 5N.

  On the other hand, when the neutral points 5N of the helically wound sheet-like coils 3, 3, and 3 are integrated, as shown in FIG. 5B, the U-phase termination portion UE1 of the sheet 1 and the U-phase termination portion of the sheet 2 The UE2 and the U-phase terminal unit UE3 of the seat 3 are electrically connected by a U-phase crossover line UC4. Similarly, the V-phase terminal portion VE1 of the sheet 1, the V-phase terminal portion VE2 of the sheet 2, and the V-phase terminal portion VE3 of the sheet 3 are electrically connected by the V-phase connecting wire VC4, and the W-phase of the sheet 1 The end portion WE1, the W-phase end portion WE2 of the sheet 2, and the W-phase end portion WE3 of the sheet 3 are electrically connected by a W-phase jumper WC4. The U-phase crossover line UC4, the V-phase crossover line VC4, and the W-phase crossover line WC4 are electrically connected and grouped together as a neutral point 5N.

  In the present embodiment, each helically wound sheet-like coil 3 is arranged with the sheet end aligned in the moving direction of the mover magnetic pole. Therefore, when the phase coils 6U1 to 6U3, 6V1 to 6V3, and 6W1 to 6W3 having the same phase are connected in parallel between the helical wound sheet coils 3, the helical winding sheet coils 3 and 3 are connected to each other. Do not cross. Therefore, the arrangement between the helically wound sheet-like coils 3, 3 and 3 can be made compact, and the three-phase rotating electrical machine can be reduced in size and cost. The arrangement for connecting the helically wound sheet-like coils 3, 3, 3 is to provide a neutral point 5 N for each of the helically wound sheet-like coils 3, 3, 3 (in the case shown in FIG. ) Is a U-phase crossover line UC3, a V-phase crossover line VC3, and a W-phase crossover line WC3. When the neutral points 5N of the helically wound sheet-like coils 3, 3 and 3 are integrated (in FIG. Are the U-phase crossover lines UC3 and UC4, the V-phase crossover lines VC3 and VC4, and the W-phase crossover lines WC3 and WC4.

  Further, in the present embodiment, each helically wound sheet-like coil 3 is arranged with the sheet end aligned in the moving direction of the mover magnetic pole, and the in-phase phase coils 6U, 6V, 6W are connected in parallel. Compared with the first embodiment in which the in-phase phase coils 6U, 6V, 6W are connected in series, the arrangement between the helically wound sheet-like coils 3, 3, 3 can be simplified. When the neutral points 5N of the helically wound sheet-like coils 3, 3 and 3 are integrated (in the case shown in FIG. 5B), the helically wound sheet-like coils 3, 3 and 3 are individually neutralized. Compared with the case where the point 5N is provided (in the case shown in FIG. 5A), the arrangement between the helically wound sheet-like coils 3, 3 and 3 is increased, but the arrangement within the helically wound sheet-like coil 3 is simplified. Can be

<Sixth Embodiment>
This embodiment differs in the structure of the helical winding sheet-like coil 3 compared with 5th Embodiment. Specifically, three helically wound sheet-like coils 3 (sheets 1) described in the fourth embodiment are used. FIG. 18 is a schematic diagram showing a connection state between the three helically wound sheet-like coils 3, 3 and 3. The figure shows the connection state of the windings in the sheet thickness direction view of the three helically wound sheet-like coils 3, 3, 3 (sheets 1 to 3). Only the connection of 12 coil sides is shown. This figure shows a case where neutral points 5N are individually provided for the helically wound sheet-like coils 3, 3, and 3, and corresponds to FIG. Therefore, the connection state between the three helically wound sheet-like coils 3, 3, 3 is the same as in the fifth embodiment.

  In this embodiment, similarly to the fifth embodiment, each helically wound sheet-like coil 3 is arranged with the sheet end aligned in the moving direction of the mover magnetic pole. Therefore, when the phase coils 6U1 to 6U3, 6V1 to 6V3, and 6W1 to 6W3 having the same phase are connected in parallel between the helical wound sheet coils 3, the helical winding sheet coils 3 and 3 are connected to each other. (U-phase crossover line UC3, V-phase crossover line VC3, W-phase crossover line WC3) do not intersect. Therefore, the arrangement between the helically wound sheet-like coils 3, 3 and 3 can be made compact, and the three-phase rotating electrical machine can be reduced in size and cost.

  In this embodiment, phase unit coils 5U1 and 5U2 are connected in parallel to form phase coil 6U, and phase unit coils 5V1 and 5V2 are connected in parallel to configure phase coil 6V. And the phase unit coil 5W1, 5W2 is connected in parallel, and the phase coil 6W is comprised. Therefore, the same effect as described above can be obtained in the fourth embodiment. That is, the generation of circulating current within and between phases can be prevented, and the output of the three-phase rotating electrical machine can be maintained without lowering the output of the 3-phase rotating electrical machine due to the circulating current. Furthermore, in this embodiment, compared with 5th Embodiment, the arrangement | positioning in the helical winding sheet-like coil 3 can be simplified. As in the fifth embodiment, the neutral points 5N of the helically wound sheet-like coils 3, 3, and 3 can be integrated.

<Seventh embodiment>
This embodiment is different from the fourth embodiment in that the phase coils 6U, 6V, 6W are Δ-connected. That is, in this embodiment, the phase coils 6U, 6V, and 6W are Δ-connected using the helically wound sheet-like coil 3 described in the fourth embodiment. FIG. 19 is a schematic diagram showing a phase configuration of a three-phase rotating electrical machine. The helically wound sheet-like coil 3 includes a U1 phase coil unit 1a and a U2 phase coil unit 1b connected in series to form a phase unit coil 5U1, and a U2 phase coil unit 1a and a U1 phase coil unit 1b. The coil unit 1b is connected in series to form a phase unit coil 5U2. Phase unit coils 5U1 and 5U2 are connected in parallel to form phase coil 6U1. In the other two helically wound sheet-like coils 3 and 3, phase coils 6U2 and 6U3 similar to the phase coil 6U1 are formed, and the three phase coils 6U1 to 6U3 are connected in series starting from the phase terminal 5T1. Connected to the phase terminal 5T2. Note that the three phase coils 6U1 to 6U3 connected in series are referred to as a phase coil 6U, and in the figure, the three phase coils 6U1 to 6U3 are collectively described. The same applies to the V phase and the W phase, and the phase coils 6U, 6V, and 6W are Δ-connected.

  FIG. 20 is a schematic diagram showing a connection state between the three helically wound sheet-like coils 3, 3 and 3. This figure shows the connection state of the windings of the three helically wound sheet-like coils 3, 3, 3 (sheets 1 to 3) as viewed in the sheet thickness direction. The sheet-like coils 3, 3, 3 are described while being shifted in the vertical direction on the paper surface.

  The W-phase end portion WE1 of the sheet 1 and the W-phase start end portion WS2 of the sheet 2 are electrically connected by a W-phase connecting wire WC1, and the U-phase end portion UE1 of the sheet 1 and the U-phase start end portion US2 of the sheet 2 Are electrically connected by a U-phase crossover line UC1. The V-phase terminal portion VE1 of the sheet 1 and the V-phase start end portion VS2 of the sheet 2 are electrically connected by a V-phase connecting line VC1. Similarly, between the sheet 2 and the sheet 3, the phase ends of the same phase are electrically connected by the V-phase connecting line VC2, the W-phase connecting line WC2, and the U-phase connecting line UC2. Further, the U-phase terminal portion UE3 of the sheet 3 and the V-phase start end portion VS1 of the sheet 1 are electrically connected by the interphase connecting wire UV1, and the V-phase end portion VE3 of the sheet 3 and the W-phase start end portion of the sheet 1 are connected. WS1 is electrically connected by an interphase connecting line VW1. The W-phase end portion WE3 of the sheet 3 and the U-phase start end portion US1 of the sheet 1 are electrically connected by an interphase connecting wire WU1.

  In the present embodiment, the sheet 2 is arranged with an electrical angle of 240 ° with respect to the sheet 1 in the same direction as the layer shift direction inside the sheet, and the sheet 3 is located inside the sheet with respect to the sheet 2. The electrical angle is 240 ° shifted in the same direction as the layer shift direction. Therefore, when the phase coils 6U1 to 6U3, 6V1 to 6V3, and 6W1 to 6W3 having the same phase are connected in series between the helically wound sheet-like coils 3, the arrangement for connecting the helically wound sheet-like coils 3 and 3 and 3 is connected. (U-phase crossover lines UC1, UC2, V-phase crossover lines VC1, VC2, W-phase crossover lines WC1, WC2, inter-phase crossover lines UV1, VW1, WU1) do not intersect. Therefore, the arrangement between the helically wound sheet-like coils 3, 3 and 3 can be made compact, and the three-phase rotating electrical machine can be reduced in size and cost.

  In this embodiment, phase unit coils 5U1 and 5U2 are connected in parallel to form phase coil 6U, and phase unit coils 5V1 and 5V2 are connected in parallel to configure phase coil 6V. And the phase unit coil 5W1, 5W2 is connected in parallel, and the phase coil 6W is comprised. Therefore, the same effect as described above can be obtained in the fourth embodiment. That is, the generation of circulating current within and between phases can be prevented, and the output of the three-phase rotating electrical machine can be maintained without lowering the output of the 3-phase rotating electrical machine due to the circulating current. Note that, as shown in the second embodiment, the sheet 2 is arranged with respect to the sheet 1 by being shifted by an electrical angle of 120 ° in the direction opposite to the layer displacement direction inside the sheet, and the sheet 3 is arranged with respect to the sheet 2. Further, it can be arranged by shifting the electrical angle by 120 ° in the direction opposite to the layer shift direction inside the sheet. In addition, as shown in the third embodiment, the sheet 2 is arranged with an electrical angle of 240 ° with respect to the sheet 1 in the same direction as the layer displacement direction inside the sheet, and the sheet 3 is arranged with respect to the sheet 2. Further, it can be arranged by shifting the electrical angle by 120 ° in the direction opposite to the layer shift direction inside the sheet.

<Eighth Embodiment>
This embodiment is different from the first embodiment in that the phase coils 6U, 6V, 6W are Δ-connected, and the configuration of the helically wound sheet-like coil 3 is different from that in the seventh embodiment. That is, in this embodiment, the phase coils 6U, 6V, and 6W are Δ-connected using the helically wound sheet-like coil 3 described in the first embodiment. FIG. 21 is a schematic diagram showing a connection state between the three helically wound sheet-like coils 3, 3 and 3. This figure shows the connection state of the windings of the three helically wound sheet-like coils 3, 3, 3 (sheets 1 to 3) as viewed in the sheet thickness direction. The sheet-like coils 3, 3, 3 are described while being shifted in the vertical direction on the paper surface.

  The connection state between the three helically wound sheet-like coils 3, 3, and 3 in this embodiment and the arrangement of the mover magnetic poles in the moving direction are the same as in the seventh embodiment. Therefore, when the phase coils 6U1 to 6U3, 6V1 to 6V3, and 6W1 to 6W3 having the same phase are connected in series between the helically wound sheet-like coils 3, the arrangement for connecting the helically wound sheet-like coils 3 and 3 and 3 is connected. (U-phase crossover lines UC1, UC2, V-phase crossover lines VC1, VC2, W-phase crossover lines WC1, WC2, inter-phase crossover lines UV1, VW1, WU1) do not intersect. Therefore, the arrangement between the helically wound sheet-like coils 3, 3 and 3 can be made compact, and the three-phase rotating electrical machine can be reduced in size and cost.

  Note that, as shown in the second embodiment, the sheet 2 is arranged with respect to the sheet 1 by being shifted by an electrical angle of 120 ° in the direction opposite to the layer displacement direction inside the sheet, and the sheet 3 is arranged with respect to the sheet 2. Further, it can be arranged by shifting the electrical angle by 120 ° in the direction opposite to the layer shift direction inside the sheet. In addition, as shown in the third embodiment, the sheet 2 is arranged with an electrical angle of 240 ° with respect to the sheet 1 in the same direction as the layer displacement direction inside the sheet, and the sheet 3 is arranged with respect to the sheet 2. Further, it can be arranged by shifting the electrical angle by 120 ° in the direction opposite to the layer shift direction inside the sheet.

<Ninth Embodiment>
This embodiment is different from the fifth embodiment in that the phase coils 6U, 6V, 6W are Δ-connected. FIG. 22 is a schematic diagram showing a connection state between the three helically wound sheet-like coils 3, 3 and 3. (A) shows the case where the phases are individually connected for each of the helically wound sheet-like coils 3, 3, 3, and (b) shows the case where the connecting lines between the phases are integrated. The figure shows the connection state of the windings in the sheet thickness direction view of the three helically wound sheet-like coils 3, 3, 3 (sheets 1 to 3). Only the connection of 12 coil sides is shown.

  In-phase coils 6U, 6V, 6W are connected in parallel between the helically wound sheet-like coils 3, respectively. Specifically, the U-phase start ends US1, US2, and US3 of the sheets 1 to 3 are electrically connected by a U-phase connecting wire UC3, and the V-phase start ends VS1, VS2, and VS3 of the sheets 1 to 3 are Are electrically connected by a V-phase crossover line VC3. The W-phase start ends WS1, WS2, WS3 of the sheets 1 to 3 are electrically connected by a W-phase crossover line WC3.

  In the case where the phases are individually connected to each of the helically wound sheet-like coils 3, 3, 3, as shown in FIG. 5A, in the sheet 1, the U-phase terminal portion UE 1 and the V-phase start end portion VS 1 are electrically connected. The V-phase termination portion VE1 and the W-phase start end portion WS1 are electrically connected. Then, the W-phase end portion WE1 and the U-phase start end portion US1 are electrically connected. The same applies to the sheet 2 and the sheet 3. When integrating the connection lines between the phases, as shown in FIG. 4B, without connecting the phases between the sheets 1 to 3, one helical wound sheet-like coil 3 (the sheet 1 in the figure) The sheets 1 to 3 are electrically connected with each other, and the sheets 1 to 3 are electrically connected with the interphase connecting wires UV1, VW1, and WU1.

  In the present embodiment, each helically wound sheet-like coil 3 is arranged with the sheet end aligned in the moving direction of the mover magnetic pole. Therefore, when the phase coils 6U1 to 6U3, 6V1 to 6V3, and 6W1 to 6W3 having the same phase are connected in parallel between the helical wound sheet coils 3, the helical winding sheet coils 3 and 3 are connected to each other. Do not cross. Therefore, the arrangement between the helically wound sheet-like coils 3, 3 and 3 can be made compact, and the three-phase rotating electrical machine can be reduced in size and cost. In addition, the arrangement for connecting the helically wound sheet-like coils 3, 3, 3 is the case where the phases are individually connected to each of the helically wound sheet-like coils 3, 3, 3 (in the case shown in FIG. , U-phase crossover line UC3, V-phase crossover line VC3, W-phase crossover line WC3, and when connecting the connection lines between the phases (as shown in FIG. 5B), U-phase crossover line UC3, V-phase crossover line Line VC3, W-phase crossover line WC3, and interphase crossover lines UV1, VW1, and WU1.

  In the present embodiment, each helically wound sheet-like coil 3 is arranged with the sheet end aligned in the moving direction of the mover magnetic pole, and the in-phase phase coils 6U, 6V, 6W are connected in parallel. Compared with the eighth embodiment in which the phase coils 6U, 6V, 6W of the same phase are connected in series, the arrangement between the helically wound sheet coils 3, 3, 3 can be simplified. In addition, when integrating the connection line between phases (in the case shown in the same figure (b)), when connecting each phase for every helical winding sheet-like coil 3, 3, and 3 (in the case shown in the same figure (a)) ), The arrangement between the helically wound sheet-like coils 3, 3 and 3 is increased, but the arrangement within the helically wound sheet-like coil 3 can be simplified.

<Tenth Embodiment>
This embodiment is different from the sixth embodiment in that the phase coils 6U, 6V, 6W are Δ-connected, and the configuration of the helically wound sheet-like coil 3 is different from the ninth embodiment. That is, in this embodiment, the phase coils 6U, 6V, and 6W are Δ-connected using the helically wound sheet-like coil 3 described in the sixth embodiment. FIG. 23 is a schematic diagram showing a connection state between the three helically wound sheet-like coils 3, 3 and 3. (A) shows the case where the phases are individually connected for each of the helically wound sheet-like coils 3, 3, 3, and (b) shows the case where the connecting lines between the phases are integrated. The figure shows the connection state of the windings in the sheet thickness direction view of the three helically wound sheet-like coils 3, 3, 3 (sheets 1 to 3). Only the connection of 12 coil sides is shown.

  The connection state between the three helically wound sheet-like coils 3, 3, and 3 in the present embodiment and the arrangement of the mover magnetic poles in the moving direction are the same as in the ninth embodiment. Therefore, when the phase coils 6U1 to 6U3, 6V1 to 6V3, and 6W1 to 6W3 having the same phase are connected in parallel between the helical wound sheet coils 3, the helical winding sheet coils 3 and 3 are connected to each other. Do not cross. Therefore, the arrangement between the helically wound sheet-like coils 3, 3 and 3 can be made compact, and the three-phase rotating electrical machine can be reduced in size and cost. In addition, the arrangement for connecting the helically wound sheet-like coils 3, 3, 3 is the case where the phases are individually connected to each of the helically wound sheet-like coils 3, 3, 3 (in the case shown in FIG. , U-phase crossover line UC3, V-phase crossover line VC3, W-phase crossover line WC3, and when connecting the connection lines between the phases (as shown in FIG. 5B), U-phase crossover line UC3, V-phase crossover line Line VC3, W-phase crossover line WC3, and interphase crossover lines UV1, VW1, and WU1.

  In the present embodiment, each helically wound sheet-like coil 3 is arranged with the sheet end aligned in the moving direction of the mover magnetic pole, and the in-phase phase coils 6U, 6V, 6W are connected in parallel. Compared with the seventh embodiment in which the phase coils 6U, 6V, 6W of the same phase are connected in series, the arrangement between the helically wound sheet coils 3, 3, 3 can be simplified. Furthermore, in this embodiment, the arrangement in the helically wound sheet-like coil 3 can be simplified as compared with the ninth embodiment. In addition, when integrating the connection line between phases (in the case shown in the same figure (b)), when connecting each phase for every helical winding sheet-like coil 3, 3, and 3 (in the case shown in the same figure (a)) ), The arrangement between the helically wound sheet-like coils 3, 3 and 3 is increased, but the arrangement within the helically wound sheet-like coil 3 can be simplified.

<Summary>
In the above-described embodiment, each helically wound sheet-like coil 3 has U1-phase and U2-phase coil sides that are separated by one winding pitch in the moving direction of the mover magnetic pole. That is, the phase coil 6U is formed by using two types of coil sides having the same phase and different electromagnetic phases. The same applies to the V phase and the W phase. However, the present invention is not limited to this. Hereinafter, an example in which the phase coils 6U, 6V, and 6W are formed using four types of coil sides having the same phase and electromagnetically different phases will be described.

  FIG. 24 is a schematic diagram showing an example of the connection state of the U-phase coil of the helically wound sheet-like coil 3 having four types of coil sides per pole. (A) shows the connection state of the phase unit coil 5U1, and (b) shows the connection state of the phase unit coil 5U2. Hereinafter, the U phase will be described as an example based on the same figure, but the same applies to the V phase and the W phase. In addition, although the figure has shown the form by which the phase unit coils 5U1 and 5U2 are connected in parallel, the phase unit coils 5U1 and 5U2 can also be connected in series.

  As shown in FIG. 5A, the phase unit coil 5U1 is formed by connecting a U1-phase coil unit 1a, a U2-phase coil unit 1b, a U3-phase coil unit 1a, and a U4-phase coil unit 1b in series. The U1-phase coil unit 1a is wound rightward from the U-phase starting end US1, and is wound back on the other end side of the helically wound sheet-like coil 3 so that the U2-phase coil unit 1b It is connected. The U2-phase coil unit 1b is wound leftward in the drawing, is wound back at one end of the helically wound sheet-like coil 3, and is connected to the U3-phase coil unit 1a. The U3-phase coil unit 1a is wound in the right direction on the paper surface, is wound back at the other end of the helically wound sheet-like coil 3, and is connected to the U4-phase coil unit 1b. The U4-phase coil unit 1b is wound leftward in the drawing, and is connected to the U-phase terminal unit UE1 on one end side of the helically wound sheet-like coil 3.

  As shown in FIG. 2B, the phase unit coil 5U2 includes a U4 phase coil unit 1a, a U3 phase coil unit 1b, a U2 phase coil unit 1a, and a U1 phase coil unit 1b connected in series. The U4-phase coil unit 1a is wound rightward from the U-phase starting end US1 and is wound back on the other end side of the helically wound sheet-like coil 3 so that the U3-phase coil unit 1b It is connected. The U3-phase coil unit 1b is wound leftward in the drawing, is wound back at one end side of the helically wound sheet-like coil 3, and is connected to the U2-phase coil unit 1a. The U2-phase coil unit 1a is wound in the right direction of the drawing, is wound back at the other end of the helically wound sheet-like coil 3, and is connected to the U1-phase coil unit 1b. The U1-phase coil unit 1b is wound leftward in the drawing, and is connected to the U-phase terminal unit UE1 on one end side of the helically wound sheet-like coil 3.

  In the above-described embodiment, the coil units 1a and 1b are connected in series so as to reciprocate once in the sheet, and the phase unit coils 5U1 and 5U2 are formed. On the other hand, in the form shown in the figure, the coil units 1a and 1b are connected in series so as to reciprocate twice in the sheet, and phase unit coils 5U1 and 5U2 are formed. Further, assuming that the number of types of coil sides for each pole and each phase is n (n is a natural number), n is 2 in the above-described embodiment, and n is 4 in the form shown in FIG.

  As described above, when the number n of coil sides for each pole / phase is an even number, the coil units 1a and 1b are connected in series so as to reciprocate n / 2 times in the sheet to form the phase unit coils 5U1 and 5U2. can do. Therefore, the U-phase start end portion US1 and the U-phase end portion UE1 of the phase unit coils 5U1 and 5U2 can be arranged in the vicinity in the circumferential direction. Therefore, when switching the coil sides at the sheet end of the helically wound sheet-like coil 3, the arrangement of the phase unit coils 5U1, 5U2 at the U-phase starting end US1 and the U-phase terminating end UE1 is easy. Workability is improved.

  In addition, when the number n of types of coil sides per pole is an odd number, the coil sides may be switched in the middle of the moving direction of the mover magnetic pole of the helically wound sheet-like coil 3. However, it is assumed that the coil side portions are switched in units of stator circumference. Further, it is preferable that the coil is wound so as to have a full-pitch wave winding configuration except for the sheet end of the helically wound sheet-like coil 3 in the moving direction of the mover magnetic pole to which the coil side is reconnected. . Thereby, the coil end part height of the sheet | seat thickness direction of all the volume winding parts can be made uniform.

  Next, in the helically wound sheet-like coil 3 having n types (n is a natural number) of coil sides of the same phase electromagnetically different in phase, the phase unit coils 5X1, 5X2 (X is any of U, V, and W). Hereinafter, the same applies to the phase coil 6X. In this case, the wave winding of the three-phase rotating electrical machine has one coil side portion per pole among n types (n is a natural number) of coil side portions of the same phase that are arranged in phases for each pole and different in phase. The selected coil sides corresponding to the required number of poles are connected in series by the coil ends to form phase unit coils 5X1 and 5X2, and the two phase unit coils 5X1 having different coil sides are selected. 5X2 are connected in parallel to form the phase coil 6X. And each phase unit coil 5X1, 5X2 of the phase coil 6X includes the same number of all the n types of coil sides, and the coil sides so that the number of coil sides connected in series is the same. Is selected.

Further, it is preferable that the relational expression indicating the total number of coil sides in the phase coil 6X is expressed by the following formula 1. However, the number of coil sides connected in series in each phase unit coil 5X1, 5X2 is the number k of series coil sides, the number of magnetic poles is 2p, and the number of series conductors per magnetic pole belonging to one coil side type is q.
(Equation 1)
2 × k = n × q × 2p

In order to prevent the occurrence of circulating current in the phase, each of the phase unit coils 5X1, 5X2 connected in parallel includes the same number of all the n types of coil sides, and the coil sides connected in series Must have the same number. That is, since the series coil side part number k must be a natural number multiple of n, the series coil side part number k can be expressed by the following formula 2 using the natural number g.
(Equation 2)
k = g × n

Further, for example, even if the field magnetic flux varies due to the eccentricity of the rotor 72 or the like, it is necessary that the induced voltage generated in the phase coil 6X does not vary. When the field magnetic flux varies, a coil portion having a relatively high induced voltage and a coil portion having a relatively low induced voltage are generated in the phase coil 6X around the stator. Therefore, by making the circumferential length (sheet length) of the phase unit coils 5X1 and 5X2 a natural number times the circumferential length of the stator, the induced voltage is made uniform in the circumference of the stator. Since the number of side portions of the series coil included in the circumferential length of the phase unit coils 5X1 and 5X2 is k and the number of magnetic poles included in the circumferential length of the stator is 2p, these relationships are expressed as follows using a natural number m. 3 can be expressed. Further, considering the phase unit coils 5X1 and 5X2 in which the number q of series conductors belonging to one coil side type is connected in series, the series coil side part number k can be expressed by the following formula 4 using a natural number z. Note that the relational expression represented by Expression 3 is represented by the relational expression represented by Expression 4.
(Equation 3)
k = m × 2p
(Equation 4)
k = z × 2p × q

The total number of coil sides corresponding to 1 is the product of 2 which is the parallel number of the phase unit coils 5X1 and 5X2 and the number k of series coil sides, so the total number of coil sides corresponding to 1 is as described above. It can be represented by the number 1 of Substituting equation 2 into equation 1, equation 1 can be expressed by equation 5 below. Further, when Formula 4 is substituted into Formula 1, Formula 1 can be expressed by Formula 6 below. From Equations 5 and 6, the common divisor of q × 2p and n needs to be 2.
(Equation 5)
2 = q × 2p / g
(Equation 6)
2 = n / z

  Each phase unit coil 5X1, 5X2 connected in parallel includes the same number of all n types of coil sides, and the coil sides are selected so that the number of coil sides connected in series is the same. Therefore, the induced voltages generated in the phase unit coils 5X1 and 5X2 connected in parallel are equal. Therefore, no intra-phase circulating current is generated, so that the output of the three-phase rotating electrical machine can be maintained without lowering the output of the three-phase rotating electrical machine due to the intra-phase circulating current. Further, when the relational expression indicating the total number of coil side portions in the phase coil 6X is expressed by the following formula 1, the circumferential length of the phase unit coils 5X1 and 5X2 (the number of series coil side portions included is k) is the circumferential direction of the stator. Since the stator has a wave winding structure that is a natural number times the length (the number of magnetic poles included is 2p), for example, even if the field magnetic flux varies due to the eccentricity of the rotor 72, the phase coils 6U, 6V , The induced voltage generated between 6 W is less likely to vary. Therefore, it is possible to maintain the output of the three-phase rotating electrical machine without reducing the output of the 3-phase rotating electrical machine due to the internal circulation current between the phases.

  Next, the wave winding configuration of the stator circumference will be described. The wave winding of the three-phase rotating electric machine according to the present invention may be formed by laminating a plurality of helically wound sheet-like coils 3 having a length corresponding to the circumference of the stator h to have a wave winding configuration having a length corresponding to the circumference of the stator L. it can. Here, L is the total circumference of the helically wound sheet-like coil 3 obtained by adding up the circumferential lengths (sheet lengths) of the helically wound sheet-like coils 3 to be used (hereinafter referred to as the total circumference L). In addition, h is a natural number smaller than the total circumference L of the helically wound sheet-like coil 3 or a divisor of the total circumference L of the helically wound sheet-like coil 3 (however, the total circumference L itself is excluded). (Hereinafter referred to as unit frequency h). Table 1 shows an example of variations of the unit frequency h and combinations of the unit frequency h where a natural number smaller than the total frequency L of the helically wound sheet-like coil 3 is set as the unit frequency h.

  For example, consider a wave winding configuration with a length of four stators. In this case, the total winding number L of the helically wound sheet-like coil 3 is 4, and the unit winding number h is any one of natural numbers 3, 2, 1 smaller than 4. The variation of the unit turn number h refers to the type of the helically wound sheet-like coil 3 to be laminated. In this case, the helically wound sheet-like coil 3 for the stator 3 turns, the helically wound sheet-like coil 3 for the 2 turns of the stator, and There are three types of helically wound sheet-like coils 3 for one turn of the stator. The combinations of unit frequency h at this time are (3, 1), (2, 2), (2, 1, 1), (1, 1, 1, 1) as shown in the table. For example, (3, 1) is a wave winding configuration having a length corresponding to four stators by laminating a helically wound sheet-like coil 3 for three rotations of the stator and a helical winding sheet-like coil 3 for one rotation of the stator. It shows the case. The same applies to the other total number L and unit number h.

  On the other hand, an example of a combination of the unit frequency h and a combination of the unit frequency h where the divisor of the total frequency L of the helically wound sheet-like coil 3 (excluding L itself) is the unit frequency h. It shows in Table 2.

  Similarly, consider a wave winding configuration with a length of four stators. In this case, since the total winding number L of the helically wound sheet-like coil 3 is 4, 2 and 1 excluding 4 among the divisors of 4 are the unit winding number h. That is, 2, 1 is given as a variation of the unit frequency h. At this time, the combination of the unit frequency h can be (2, 2), (1, 1, 1, 1). When the combination of the number of unit rounds h is (2, 2), two helically wound sheet-like coils 3 for two stator rounds are stacked to form a wave winding configuration having a length for four stator rounds. In the case of (1, 1, 1, 1), four helically wound sheet-like coils 3 for one rotation of the stator are stacked to form a wave winding configuration having a length for four rotations of the stator. In any case, since one type of helically wound sheet-like coil 3 can be used to form a wave winding configuration having a length equivalent to the circumference of the stator 4, the helically wound sheet-like coil 3 can be easily manufactured.

  In the helically wound sheet-like coil 3 to be stacked, phase coils 6U, 6V, and 6W having the same phase are electrically connected between the plurality of helically wound sheet-like coils 3 respectively. When the in-phase phase coils 6U, 6V, 6W are connected in series between the helical wound sheet coils 3, the unit number of turns h is a natural number smaller than the total number L of the helical wound sheet coils 3 or helical Any divisor of the total circumference L of the wound sheet-like coil 3 (however, the total circumference L itself is excluded) may be used. On the other hand, when the in-phase phase coils 6U, 6V, and 6W are connected in parallel between the helically wound sheet-like coils 3, the helically wound sheet-like coils 3 are arranged in the moving direction of the mover magnetic poles. . Therefore, it is necessary to form a wave winding of a three-phase rotating electrical machine by laminating a plurality of one type of helically wound sheet-like coil 3. Therefore, the unit circumference number h is a divisor of the total circumference L of the helically wound sheet-like coil 3 (however, the total circumference L itself is excluded).

<Others>
The present invention is not limited to the embodiment described above and shown in the drawings, and can be implemented with appropriate modifications within a range not departing from the gist. In addition, the present invention can be used for various three-phase rotating electrical machines of a wave winding method, and can be used for, for example, a vehicle drive motor, a generator, an industrial device, and the like.

10a, 10b: coil sides,
20a, 20b: coil ends,
3: Helical wound sheet coil,
5X1, 5X2: Phase unit coil,
6X: Phase coil.
However, X is any one of U, V, and W.

Claims (8)

A coil conductor having coil sides alternately inserted into the slots of the stator core and a coil end integrally formed with the coil sides and connecting the same side ends of the coil sides is connected helically. A helical winding sheet-like coil wound to have a wave winding configuration is a wave winding of a three-phase rotating electrical machine in which a plurality of helically wound sheet-like coils are laminated and electrically connected in the sheet thickness direction,
The helically wound sheet-like coils adjacent in the sheet thickness direction are arranged so as to be shifted in the moving direction of the mover magnetic pole, and phase coils of the same phase are connected in series between the helically wound sheet-like coils 3 Wave winding of phase rotating electric machine. The direction of movement of the mover magnetic pole and the direction from one end side of the helically wound sheet-like coil from which the phase end portion of the phase coil is drawn to the other end side of the helically wound sheet-like coil is the layer shift direction inside the sheet And when
2. The wave of the three-phase rotating electrical machine according to claim 1, wherein the helically wound sheet-like coils adjacent to each other in the sheet thickness direction are arranged with an electrical angle shifted by 240 ° in the same direction as the layer shift direction inside the sheet. Winding winding. The direction of movement of the mover magnetic pole and the direction from one end side of the helically wound sheet-like coil from which the phase end portion of the phase coil is drawn to the other end side of the helically wound sheet-like coil is the layer shift direction inside the sheet And when
2. The wave of the three-phase rotating electrical machine according to claim 1, wherein the helically wound sheet-like coils adjacent in the sheet thickness direction are arranged with an electrical angle shifted by 120 ° in a direction opposite to a layer shift direction inside the sheet. Winding winding. A coil conductor having coil sides alternately inserted into the slots of the stator core and a coil end integrally formed with the coil sides and connecting the same side ends of the coil sides is connected helically. A helical winding sheet-like coil wound to have a wave winding configuration is a wave winding of a three-phase rotating electrical machine in which a plurality of helically wound sheet-like coils are laminated and electrically connected in the sheet thickness direction,
Each of the helically wound sheet-like coils is arranged so as to be aligned with the moving direction of the mover magnetic pole, and the same-phase coil is connected in parallel between the helically wound sheet-like coils. line. Coils corresponding to the required number of poles are selected by selecting one coil side from among the n types (n is a natural number) of the above-mentioned coil sides having the same phase and different phases arranged in each phase. A side unit is connected in series by the coil end to form a phase unit coil, and two phase unit coils with different selected coil sides are connected in parallel to form the phase coil.
Each phase unit coil of the phase coil includes the same number of all the n types of the coil side portions, and the coil side portions have the same number of the coil side portions connected in series. The wave winding of the three-phase rotating electrical machine according to any one of claims 1 to 4, which is selected.   The wave winding of the three-phase rotating electrical machine according to any one of claims 1 to 5, wherein the coil side portion has a cross-sectional shape changed for each turn according to the shape of the magnetic pole tooth portion of the stator core. . Among the plurality of helically wound sheet-like coils, the helically wound sheet-like coil close to the slot bottom side of the stator core is used as an outer peripheral helically wound sheet-like coil, and the helically wound sheet-like coil close to the mover side is When using an inner circumferential helically wound sheet-like coil,
The outer circumferential side helically wound sheet-like coil and the inner circumferential side helically wound sheet shaped coil have a conductor cross-sectional area of the coil conductor smaller than that of the other helically wound sheet shaped coil. A wave winding of the three-phase rotating electrical machine according to claim 1. Among the plurality of helically wound sheet-like coils, the helically wound sheet-like coil close to the slot bottom side of the stator core is used as an outer peripheral helically wound sheet-like coil, and the helically wound sheet-like coil close to the mover side is When using an inner circumferential helically wound sheet-like coil,
Between the coil end of the outer peripheral helically wound sheet-like coil and the housing is filled with a heat conducting member,
The conductor cross-sectional area of the coil conductor is gradually reduced for each helical winding sheet-like coil from the inner peripheral helical winding sheet-like coil to the outer peripheral helical winding sheet-like coil. Wave winding of the three-phase rotating electrical machine according to item.

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