JP2009065750A - Rotating machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a rotating machine which can reduce eddy current loss generated in the housing by suppressing generation of induction magnetic field on the periphery of a lead wire being led out of the housing even if the distance between the bearing for supporting the rotating shaft is shortened, and can reduce generation of heat or voltage drop in the lead wire by suppressing increase of wiring resistance in the lead wire resulting from skin effect. <P>SOLUTION: Each of a plurality of phase coils 23 constituting a stator coil 22 has a pair of lead-out conductor plates 27 and 28 connected with its start-of-winding and end-of-winding. The pair of lead-out conductor plates 27 and 28 made to have a rectangular cross-section are extended radially outward while intersecting the planes consisting of the long sides of rectangular cross-section perpendicularly with the axis of the rotating shaft 13 along the end face of the stator core 19 under a state where the planes consisting of the long sides of rectangular cross-section face each other in parallel and then led out of the housing 11. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a rotating machine that is used in, for example, an electric supercharger for automobiles and is operated at high speed by being supplied with low-voltage and large-current electric power, and more particularly to supply power from a power source to a torque generating drive coil. This relates to a lead-out structure of the lead wire.

  A conventional turbocharger connects a turbine disposed in a housing and driven by exhaust gas energy, a compressor disposed in the housing, the turbine and the compressor, and is rotatably supported in the housing. And a generator composed of a power generator / electric rotor mounted on the shaft and a stator mounted in the housing (see, for example, Patent Document 1).

JP 2000-130176 A

  Since the generator applied to the conventional turbocharger is operated at a high speed of about 100,000 to 200,000 revolutions / minute, the distance between the bearings supporting the shaft is shortened, and the persistence frequency of the rotor is increased. It was necessary to increase the mechanical critical speed.

  However, an automobile turbocharger requires input / output of about 1 to 2 kW. Moreover, since a 12V or 24V system power source for automobiles is used as the power source, a current of about 100 to 300 A flows through the torque generating drive coil of the stator. Therefore, if the connection between the power supply line from the inverter and the torque generating drive coil and the connection between the three-phase coils constituting the torque generating drive torque are performed inside the generator, they are connected because of the large current wiring. The part becomes larger. As a result, the distance between the bearings that support the shaft is increased, the mechanical critical speed is lowered, and high-speed operation cannot be supported.

  In view of the above situation, the lead wire of the phase coil constituting the torque generating drive coil is pulled out of the generator, and the connection between the power supply line from the inverter and the torque generating drive coil, and the torque generating drive torque 3 are configured. It is conceivable to connect the phase coils outside the generator.

However, when the distance between the bearings supporting the shaft is shortened and the lead wire of the phase coil is pulled out of the generator, the lead wire of the phase coil is close to the housing, so that the induction magnetic field generated around the lead wire is This causes a new problem that the housing is overheated due to eddy current loss occurring in the housing.
Further, since a high-frequency large current flows through the lead wire of the phase coil, even if the apparent conductor cross-sectional area of the lead wire is ensured, the skin effect is actually remarkable and the wiring resistance increases. Therefore, the conduction loss in the lead wire increases, the heat generation in the lead wire increases, the wiring impedance between the inverter and the torque generating drive coil increases, and the voltage drop in the wiring becomes noticeable. There also arises a problem that the voltage that can be applied to the generator decreases.

  The present invention has been made to solve such a problem, and suppresses the generation of an induction magnetic field around the lead wire drawn out of the housing even if the distance between the bearings supporting the rotating shaft is shortened. An object of the present invention is to obtain a rotating machine that can reduce loss of eddy current generated in a housing, suppress an increase in wiring resistance due to a skin effect, and reduce heat generation and voltage drop at the lead wire.

  A rotating machine according to the present invention includes a rotating shaft rotatably supported in a housing, a rotor disposed in the housing and coaxially fixed to the rotating shaft, and the rotor in the housing. And a stator core in which teeth are arranged at an equiangular pitch in the circumferential direction so as to define a slot opening on the inner peripheral side, and for generating torque wound around the stator core And a stator having a drive coil. The torque generating drive coil is composed of a plurality of phase coils, and each of the plurality of phase coils has a pair of lead wires connected to the winding start and winding end, and the pair of lead wires is The planes each formed in a rectangular cross-section, the planes formed by the long sides of the cross-sectional rectangles are in parallel with each other, and the planes formed by the long sides of the cross-sectional rectangles are along the end face of the stator core. It extends outward in the radial direction perpendicular to the axis of the rotating shaft and is drawn out of the housing.

  According to the present invention, the pair of lead wires are each made to have a rectangular cross section and are drawn out of the housing in a state parallel to each other with respect to the plane formed by the long sides of the rectangular cross section. Flows on a plane composed of long sides of a rectangular cross section. Therefore, an increase in the wiring resistance of the lead wire is suppressed, and heat generation and voltage drop in the lead wire are reduced.

In addition, since the pair of lead wires are connected to the start and end of winding of the hole coil, a reverse current flows through the pair of lead wires arranged opposite to each other. Therefore, since the generation of the induction magnetic field in the vicinity where the lead wire is drawn out is suppressed, eddy current loss in the housing is reduced, and the distance between the bearings can be shortened.
Further, since the lead line is formed of a long side having a rectangular cross section and extends outward in the radial direction along the end face of the stator core so as to be perpendicular to the axis of the rotary shaft, the lead wire is drawn out of the housing. The axial height of the coil end can be reduced, and the distance between the bearings can be shortened. Furthermore, the connection between the phase coils and the connection between the phase coil and the power supply line are performed outside the housing, and the distance between the bearings can be shortened.

Embodiment 1 FIG.
FIG. 1 is a cross-sectional view schematically showing the configuration of an automotive supercharger to which a rotating machine according to Embodiment 1 of the present invention is applied, and FIG. 2 shows the configuration of the rotating machine according to Embodiment 1 of the present invention. 3 is a partially broken perspective view, FIG. 3 is a perspective view showing a one-phase coil constituting a stator coil applied to the rotating machine according to Embodiment 1 of the present invention, and FIG. 4 is Embodiment 1 of the present invention. FIG. 5 is a perspective view illustrating an arrangement state of the bus rings in the rotating machine according to the first embodiment of the present invention.

  In FIG. 1, a supercharger 1 for an automobile is provided in an intake pipe 2 and is provided in a compressor 3 for compressing air supplied to an engine (not shown) and an exhaust pipe 4. And a rotating machine 10 having an electric function and a power generation function. A rotating machine 10 is rotatably supported by a bearing 12 in a housing 11, a rotating shaft 13 that couples the compressor 3 and the turbine 5, a rotor 14 that is coaxially attached to the rotating shaft 13, and a housing 11. And a stator 18 disposed so as to surround the rotor 14.

Here, the configuration of the rotating machine 10 will be described with reference to FIGS. 2 to 5.
The rotating machine 10 is a magnetic inductor type synchronous rotating machine, and a torque 14 is driven by a rotor 14 coaxially fixed to a rotating shaft 13 and a stator core 19 disposed so as to surround the rotor 14. A stator 18 wound with a stator coil 22 as a coil, a field coil 34 as a field magnetomotive force generating coil, and a housing 11 that houses the rotor 14, the stator 18, and the field coil 34. And.

  The rotor 14 is produced by laminating and integrating a predetermined number of magnetic steel plates and the first and second magnetic bodies 15 and 16 produced by laminating and integrating a plurality of magnetic steel plates formed in a predetermined shape, for example, A disk-shaped partition wall 17 having a rotation shaft insertion hole (not shown) drilled at the axial center position. The first and second magnetic bodies 15 and 16 are formed in the same shape, and cylindrical base portions 15a and 16a each having a rotation shaft insertion hole formed at an axial center position, and radial directions from the outer peripheral surfaces of the base portions 15a and 16a. It is constituted by four salient poles 15b, 16b that are provided so as to project outward and extend in the axial direction and are provided at equiangular pitches in the circumferential direction. The first and second magnetic bodies 15, 16 are arranged with a semi-salient pole pitch in the circumferential direction, are arranged in close contact with each other via the partition wall 17, and the rotary shaft 13 inserted through the rotary shaft insertion holes is provided. It is fixed and configured. The outer diameter of the partition wall 17 corresponds to the outer diameter of the first and second magnetic bodies 15 and 16 (the outer diameter of the salient poles 15b and 16b).

  The stator core 19 includes first and second stator cores 20 and 21 that are manufactured by laminating and integrating a large number of magnetic steel plates formed in a predetermined shape. The first stator core 20 is a cylindrical core back 20a, and first teeth that project radially inward from the inner peripheral surface of the core back 20a and are provided at six equiangular pitches in the circumferential direction. Teeth 20b. A slot 20c, which is a first slot opened to the inner peripheral side, is defined between adjacent teeth 20b in the circumferential direction. The second stator core 21 is made in the same shape as the first stator core 20, and is formed in a cylindrical core back 21a and radially inwardly projecting from the inner peripheral surface of the core back 21a, etc. And teeth 21b, which are second teeth provided at six angular pitches. A slot 21c, which is a second slot opened to the inner peripheral side, is defined between the teeth 21b adjacent in the circumferential direction. The first and second stator cores 20 and 21 are disposed between the axial thickness separations of the partition wall 17 with the circumferential positions of the teeth 20b and 21b coincided with each other, and the first and second magnetic bodies 15 and 16, respectively. Go.

  The stator coil 22 includes a six-phase coil 23 wound in a so-called concentrated winding method wound around the teeth 20b and 21b that are paired in the axial direction without straddling the slots 20c and 21c. .

  Each phase coil 23 composing the stator coil 22 is composed of, for example, 16 strands 29 made of enameled wires, and is composed of two strands of wires, and a pair of in-slot conductors housed in the slots 20c and 21c. Soldering, brazing, and fusing of the wire transition conductor 24 composed of the portion 25 and the outer conductor portion 26 connecting the strands 29 of the pair of in-slot conductor portions 25 to both ends of the strand transition conductor 24 And a pair of lead conductor plates 27 and 28 as lead wires electrically connected to each other. The lead conductor plates 27 and 28 are made, for example, by press-molding a copper thin plate and covered with an insulating resin such as enamel.

  The phase coil 23 includes a pair of slots 20c and 21c sandwiching the pair of teeth 20b and 21b in the axial direction with the outer conductor portion 26 of the slot along the one end surface of the tooth 21b and the pair of inner conductor portions 25 in the axial direction. The pair of lead conductor plates 27 and 28 are wound along the other end surface of the tooth 20b by concentrated winding for one turn. Sixteen strands 29 are connected in parallel between the pair of lead conductor plates 27 and 28.

  The strands 29 constituting the strand transition conductor 24 are shifted 180 degrees from one lead conductor plate 27 to the other lead conductor plate 28. That is, the portions of the strands 29 constituting the pair of in-slot conductor portions 25 are shifted by 90 degrees. And the part of the strand 29 which comprises the outside-slot conductor part 26 becomes a pair of in-slot conductor part extended from both the slots 20c and 21c on the end surface of the 2nd stator core 21 by 8 rows 2 layers. 25, the ends of the portion of the wire 29 constituting the 25 are connected while maintaining their radial position and axial position. That is, the position of the strand 29 constituting the out-slot conductor portion 26 is maintained in the position within the strand transition conductor 24 and is not transferred. The outside-slot conductor portion 26 and the lead conductor plates 27 and 28 constitute a coil end.

Here, the transition of the strands is made by sequentially changing the position of each strand in the conductor. In the conductor cross section, it is considered that a certain strand moves in a circle around the center of the cross section, and the angle of the rotation Represents the degree of metastasis. For example, a transition in which each strand passes through all positions in the conductor cross section and becomes the same position as the position starting at the opposite end of the slot is referred to as a 360-degree transition.
In FIG. 2, only the one-phase coil 23 wound in a concentrated manner around the pair of teeth 20b and 21b is shown, but the stator coil 22 is actually connected to the six pairs of teeth 20b and 21b. On the other hand, the three phases U, V, and W are sequentially repeated twice and wound in concentrated winding.

  The U-phase bus ring 30 includes a ring-shaped base portion 30a, a pair of protruding terminals 30b extending radially inward from the inner periphery of the base portion 30a, and a tangential direction extending from the outer periphery of the base portion 30a. Power supply terminal 30c. The V-phase bus ring 31 includes a ring-shaped base portion 31a, a pair of projecting terminals 31b extending radially inward from the inner periphery of the base portion 31a, and a tangential direction extending from the outer periphery of the base portion 31a. Power supply terminal 31c. The W-phase bus ring 32 includes a ring-shaped base portion 32a, a pair of projecting terminals 32b extending radially inward from the inner periphery of the base portion 32a, and a tangential direction extending from the outer periphery of the base portion 32a. Power supply terminal 32c. The neutral point connecting bus ring 33 includes a ring-shaped base portion 33a and six projecting terminals 33b extending radially inward from the inner periphery of the base portion 33a at an equiangular pitch. The bases 30a, 31a, 32a, 33a are made in the same shape. The U-phase bus ring 30, the V-phase bus ring 31, the W-phase bus ring 32, and the neutral point connection bus ring 33 are produced, for example, by press-molding a copper thin plate and covered with an insulating resin such as enamel. .

  The U-phase bus ring 30, V-phase bus ring 31, W-phase bus ring 32, and neutral point connection bus ring 33 are arranged on the outer periphery of the housing 11 with base portions 30 a, 31 a, 32 a, 33 a coaxially and axially Are spaced apart from each other by a predetermined distance in parallel. At this time, the bases 30 a, 31 a, 32 a, and 33 a are arranged so that a plane constituted by the long sides of the cross-sectional rectangle is orthogonal to the axis of the rotating shaft 13. The base portions 30a, 31a, and 32a are arranged so that the protruding terminals 30b, 31b, and 32b are shifted from each other by 120 degrees in the circumferential direction. The base 33a is arranged so that the protruding terminal 33b overlaps the protruding terminals 30b, 31b, 32b of the bases 30a, 31a, 32a in the axial direction. Furthermore, the power supply terminals 30c, 31c, and 32c are parallel to each other with respect to the plane formed by the long side of the rectangular cross section, and the axis formed by the long side of the rectangular cross section is the axis of the rotary shaft 13. And are arranged orthogonally.

  The lead conductor plates 27 and 28 connected to the start and end of winding of the phase coil 23 are parallel to each other with respect to the plane constituted by the long sides of the rectangular cross section, and are constituted by the long sides of the rectangular cross section. This plane is perpendicular to the axis of the rotary shaft 13 and extends radially outward along the end face of the first stator core 20 to the outside from a drawer port 11a drilled in the outer peripheral wall of the housing 11. Has been pulled out.

  The ends of the lead conductor plate 28 connected to the two phase coils 23 constituting the U phase and drawn out from the housing 11 are connected to the two protruding terminals 30 b of the U phase bus ring 30, respectively. . Connected to each of the two phase coils 23 constituting the U phase, and the end portion of the lead conductor plate 27 drawn from the housing 11 is connected to each of the two protruding terminals 33 b of the neutral point connection bus ring 33. Is done. Thereby, the two phase coils 23 constituting the U phase are connected in parallel.

  Further, the end portions of the lead conductor plate 28 connected to the two phase coils 23 constituting the V phase and drawn out from the housing 11 are connected to the two protruding terminals 31 b of the V phase bus ring 31, respectively. . The ends of the lead conductor plate 27 connected to the two phase coils 23 constituting the V phase and drawn out from the housing 11 are connected to the two protruding terminals 33b of the neutral point connection bus ring 33, respectively. Is done. Thereby, the two phase coils 23 constituting the V phase are connected in parallel.

  Furthermore, the ends of the lead conductor plate 28 connected to the two phase coils 23 constituting the W phase and drawn out from the housing 11 are connected to the two protruding terminals 32b of the W phase bus ring 32, respectively. . The ends of the lead conductor plate 27 connected to each of the two phase coils 23 constituting the W phase and drawn out from the housing 11 are respectively connected to the remaining two protruding terminals 33 b of the neutral point connection bus ring 33. Connected. Thereby, the two phase coils 23 constituting the W phase are connected in parallel. The U-phase, V-phase, and W-phase coils are Y-connected, and the stator coil 22 is configured.

  In addition, in the electrical connection portion of the wire 29, the lead conductor plates 27 and 28, the U-phase bus ring 30, the V-phase bus ring 31, the W-phase bus ring 32, and the neutral point connection bus ring 33, an insulating resin layer is provided. Has been removed. And those electrical connection parts are insulation-coated after connection.

  The field coil 34 is formed by winding a conductor wire in a cylindrical shape, and is interposed between the core backs 20 a and 21 a of the first and second stator cores 20 and 21. A rotating shaft 13 that integrally fixes the first and second magnetic bodies 15 and 16 and the partition wall 17 is pivotally supported by the bearing 12.

  In the rotating machine 10 configured as described above, although not shown, the power supply terminals 30c, 31c, and 32c of the U-phase bus ring 30, the V-phase bus ring 31, and the W-phase bus ring 32 have long sides with a rectangular cross section. Are connected to the inverter via power supply lines such as parallel plate conductors or three-phase twisted wires arranged in parallel with each other.

Next, the operation of the rotating machine 10 configured as described above will be described.
In the rotating machine 10, the power supply terminals 30c, 31c, and 32c of the U-phase bus ring 30, the V-phase bus ring 31, and the W-phase bus ring 32 are connected via a power feed line such as a parallel plate conductor or a three-phase twisted wire. Connected to the inverter.
When the field coil 34 is energized, it flows from the salient poles 15b of the first magnetic body 15 to the first stator core 20 and then flows in the axial direction, as indicated by arrows in FIG. A magnetic flux returning from the core iron 21 to the salient pole 16b of the second magnetic body 16 is formed. At this time, since the salient poles 15b and 16b of the first and second magnetic bodies 15 and 16 are shifted by a half salient pole pitch in the circumferential direction, when viewed from the axial direction, the magnetic flux is in the circumferential direction. It acts as if they were arranged alternately. Accordingly, the rotating machine 10 operates as a non-commutator motor and magnetically operates in the same manner as an 8-pole 6-slot concentrated winding type permanent magnet rotating electrical machine.

Here, operation | movement of the supercharger 1 for motor vehicles is demonstrated.
In a normal state, the intake gas is supplied to the engine via the intake pipe 2 and burned inside the engine. The exhaust gas after combustion is exhausted to the outside through the exhaust pipe 4. The turbine 5 is driven by exhaust gas flowing through the exhaust pipe 4. By the rotational drive of the turbine 5, the compressor 3 fixed to the rotary shaft 13 is rotationally driven, and the intake gas is supercharged to the atmospheric pressure or higher.

For example, when the driver of the vehicle tries to accelerate by an accelerator operation, about 1 to 2 seconds until the engine reaches a predetermined rotational speed and the exhaust gas obtains sufficient fluid power is sufficient. Power cannot be applied to the turbine 5, and the reaction of the compressor 3 is delayed, causing a phenomenon called so-called turbo lag. Therefore, direct current power of a battery (not shown) is converted into alternating current power by an inverter and supplied to the rotating machine 10 through a feeder line, and the rotating machine 10 is driven as an electric motor. Thereby, the compressor 3 is driven rapidly and generation | occurrence | production of a turbo lag is suppressed.
Further, when the vehicle travels at a high speed or a high load, the exhaust gas has fluid energy higher than the power necessary for supercharging the supercharger 1 for the automobile. In that case, the rotating machine 10 is operated as a generator, the inverter is operated in the regeneration mode, and the fluid energy is regenerated. The regenerated energy is supplied to the battery and the vehicle load.

In the rotating machine 10 configured as described above, a skin effect is remarkably exhibited because a high-frequency high-current flows.
Here, when only one lead conductor plate 27 is provided, the high-frequency high current flows through a pair of planes constituted by short sides of a rectangular cross section of the lead conductor plate 27 due to the skin effect. In addition, when the pair of lead conductor plates 27 and 28 are arranged in parallel with each other with a plane formed by the short sides of the rectangular cross section, the high frequency high current is caused by the skin effect. It flows on opposing planes composed of short sides of 27 and 28 cross-sectional rectangles. In either case, the high-frequency high current flows through the plane formed by the short sides of the rectangular section of the lead conductor plates 27 and 28, and the wiring resistance increases.

  In the first embodiment, the pair of lead conductor plates 27 and 28 connected to the start and end of winding of the phase coil 23 are parallel to each other with respect to a plane formed by long sides having a rectangular cross section. Therefore, the high-frequency high current flows on the surface of the plane constituted by the long sides of the rectangular cross section of the pair of lead conductor plates 27 and 28. Therefore, increase in wiring resistance of the lead conductor plates 27 and 28 is suppressed, current loss in the lead conductor plates 27 and 28 is reduced, and heat generation is also suppressed. Furthermore, the wiring impedance in the lead conductor plates 27 and 28 is reduced, the voltage drop between the inverter and the rotating machine 10 is reduced, and the drop in the voltage substantially applied to the rotating machine 10 is suppressed.

  Further, since the pair of lead conductor plates 27 and 28 are connected to the start and end of winding of the phase coil 23, respectively, a reverse current flows through the pair of opposite lead conductor plates 27 and 28. Thus, the generation of the induction magnetic field is suppressed. Thereby, generation | occurrence | production of the eddy current loss resulting from an induction magnetic field interlinking with the housing 11 is suppressed. Therefore, even if the distance between the bearings 12 is shortened, heat generation of the housing 11 due to the induction magnetic field is prevented in advance.

Further, the base portions 30a to 33a of the U-phase, V-phase, W-phase, and neutral point connecting bus rings 30 to 33 are arranged in parallel with each other with respect to the plane formed by the long sides of the rectangular cross section. Therefore, the increase in the wiring resistance and the wiring impedance in the base portions 30a to 33a is suppressed, and the generation of the induction magnetic field is suppressed.
In addition, since the power supply terminals 30c to 32c of the U-phase, V-phase, and W-phase bus rings 30 to 32 are arranged in parallel with each other with respect to the plane formed by the long sides of the rectangular section, Increases in wiring resistance and wiring impedance at the terminals 30c to 32c are suppressed, and generation of an induced magnetic field is suppressed.
In addition, since the power supply terminals 30c to 32c are connected to the inverter via a power supply line such as a parallel plate conductor or a three-phase twisted line, an increase in wiring resistance and wiring impedance in the power supply line is suppressed, and an induction magnetic field is generated. Is suppressed.

  The pair of lead conductor plates 27 and 28 are parallel to each other with respect to the plane formed by the long side of the rectangular section, and the plane formed by the long side of the rectangular section is the axis of the rotary shaft 13. The coil end of the first stator core 20 is drawn out to the outside through a drawing port 11a extending radially outward along the end face of the first stator core 20 and drilled in the outer peripheral wall of the housing 11. The axial height is reduced, and the distance between the bearings 12 can be shortened. Furthermore, the lead conductor plates 27 and 28 are connected to the U-phase, V-phase, W-phase, and neutral point connection bus rings 30 to 33, and the U-phase, V-phase, and W-phase bus rings 30 to 32 are supplied to the inverter. There is no need to connect the electric wire in the rotating machine 10, and the distance between the bearings 12 can be shortened. As a result, the natural vibration frequency of the rotor 14 is increased, and the mechanical critical speed is increased to enable smooth high-speed operation.

In addition, since the phase coil 23 is wound in a concentrated manner, the coil ends of the phase coil 23 do not interfere with each other, and the axial height of the coil ends can be reduced.
Further, since the phase coil 23 is wound in one turn of concentrated winding, the wire diameter of the wire 29 can be increased, and a low voltage and large current can flow.
Further, the portions of the strands 29 constituting the pair of in-slot conductor portions 25 are shifted by 90 degrees, and the strands constituting the strand transition conductor 24 are shifted by 180 degrees from the start to the end of winding. Therefore, the currents induced at both ends of each strand 29 by the end magnetic flux flow in directions that cancel each other, the circulating current flowing through the pair of strands constituting the closed loop is reduced, and the copper loss can be reduced.

Embodiment 2. FIG.
6 is a perspective view showing a one-phase coil constituting a stator coil applied to a rotating machine according to Embodiment 2 of the present invention.
In FIG. 6, the phase coil 35 includes a pair of strand transition conductors 36 formed by stacking 16 strands 29 into a two-layer strand array and housed in slots 20c and 21c, and slots 20c and 21c. A flat conductor plate 37 that is electrically connected by soldering, brazing, fusing, or the like to the ends of both strand transition conductors 36 extending to one end, and electrically connects the pair of strand transition conductors 36 to each other. A pair of lead conductor plates 27 and 28 electrically connected to the end of each wire transition conductor 36 extending to the other end of the slots 20c and 21c by soldering, brazing, fusing, etc. It has.
The second embodiment is configured in the same manner as in the first embodiment except that a phase coil 35 is used instead of the phase coil 23.

Although not shown in the second embodiment, the phase coil 35 includes a pair of slots 20c that sandwich the pair of strand transition conductors 36 between the teeth 20b and 21b with the flat conductor plate 37 along the one end surface of the teeth 21b. , 21c, and a pair of lead conductor plates 27, 28 are wound around the other end surface of the tooth 20b by concentrated winding for one turn. The 16 strands 29 are connected in parallel between the one lead conductor plate 27 and the flat conductor plate 37 to form two layers and are accommodated in the slots 20c and 21c on one side of the teeth 20b and 21b. The transition from the one lead conductor plate 27 to the flat conductor plate 37 is 180 degrees. Further, the 16 strands 29 are connected in parallel between the flat conductor plate 37 and the other lead conductor plate 28 to form two layers and are accommodated in the slots 20c and 21c on the other side of the teeth 20b and 21b. The distance from the flat conductor plate 37 to the other lead conductor plate 28 is changed by 180 degrees. The flat conductor plate 37 and the lead conductor plates 27 and 28 constitute a coil end.
Therefore, also in the second embodiment, the same effect as in the first embodiment can be obtained.

Embodiment 3 FIG.
FIG. 7 is a perspective view for explaining an arrangement state of bus rings in a rotating machine according to Embodiment 3 of the present invention.
In FIG. 7, the U-phase bus ring 40 has a ring-shaped base portion 40a and a pair of protruding terminals 40b extending radially inward relative to the inner periphery of the base portion 40a. The U-phase bus 41 includes a power supply terminal 41a and a protruding terminal 41b. The V-phase bus ring 42 includes a ring-shaped base portion 42a and a pair of protruding terminals 42b extending radially inward from the inner periphery of the base portion 42a. The V-phase bus 43 includes a power feeding terminal 43a and a protruding terminal 43b. The W-phase bus ring 44 includes a ring-shaped base portion 44a and a pair of projecting terminals 44b extending radially inward from the inner periphery of the base portion 44a. The W-phase bus 45 includes a power supply terminal 45a and a protruding terminal 45b. The neutral point connection bus 46 includes an arc-shaped base 46a and three projecting terminals 46b extending radially inward at an angular pitch of 60 degrees from the inner periphery of the base 46a. The bases 40a, 42a, 44a are made in the same shape, and the base 46a is formed in an arc shape having the same radius as the bases 40a, 42a, 44a. The U-phase bus ring 40, the U-phase bus 41, the V-phase bus ring 42, the V-phase bus 43, the W-phase bus ring 44, the W-phase bus 45 and the neutral point connection bus 46 are formed by, for example, pressing a copper thin plate. And coated with an insulating resin such as enamel.

  The U-phase bus ring 40, the V-phase bus ring 42, and the W-phase bus ring 44 are arranged on the outer periphery of the housing 11 in parallel with each other, with base portions 40a, 42a, and 44a being coaxial and spaced apart by a predetermined distance in the axial direction. Established. At this time, the bases 40 a, 42 a, 44 a are arranged so that a plane constituted by the long sides of the cross-sectional rectangle is orthogonal to the axis of the rotation shaft 13. The base portions 40a, 42a, and 44a are arranged so that the protruding terminals 40b, 42b, and 44b are shifted from each other by 120 degrees in the circumferential direction. Further, the neutral point connection bus 46 has its base portion 46a spaced apart from the base portion 44a by a predetermined distance in the axial direction, and the protruding terminal 46b as viewed from the axial direction has the protruding terminals 40b of the base portions 40a, 42a, 44a. , 42b and 44b.

The U-phase bus 41 has a protruding terminal 41b that overlaps with the protruding terminal 40b of the U-phase bus ring 40 when viewed from the axial direction, and the power supply terminal 41a extends in the tangential direction of the base 40a when viewed from the axial direction. It is spaced apart from the U-phase bus ring 40 in the axial direction. The V-phase bus 43 has a protruding terminal 43b overlapped with the protruding terminal 42b of the V-phase bus ring 42 when viewed from the axial direction, and the power supply terminal 43a extends in a tangential direction of the base portion 42a when viewed from the axial direction. It is spaced apart from the V-phase bus ring 42 in the axial direction. The W-phase bus 45 has a protruding terminal 45b overlapped with the protruding terminal 44b of the W-phase bus ring 44 when viewed from the axial direction, and the power supply terminal 45a extends in the tangential direction of the base portion 44a when viewed from the axial direction. It is spaced apart from the W-phase bus ring 44 in the axial direction. The power supply terminals 41a, 43a, and 45a are parallel to each other in a plane formed by the long sides of the rectangular cross section, and the plane formed by the long sides of the rectangular cross section is orthogonal to the axis of the rotary shaft 13 Are arranged.
Other configurations are the same as those in the first embodiment.

  In the third embodiment, although not shown, the end of the lead conductor plate 28 connected to one phase coil 23 constituting the U phase and drawn out from the housing 11 is a protruding terminal of the U phase bus 41. 41 b and the end of the lead conductor plate 27 is connected to one protruding terminal 40 b of the U-phase bus ring 40. The end of the lead conductor plate 28 connected to the other phase coil 23 constituting the U phase and drawn out from the housing 11 is connected to the other protruding terminal 40b of the U phase bus ring 40, and the lead conductor plate 27 The end is connected to the U-phase protruding terminal 46 b of the neutral point connection bus 46. Thereby, two phase coils 23 which constitute U phase are connected in series.

  Further, the end of the lead conductor plate 28 connected to one phase coil 23 constituting the V phase and drawn out from the housing 11 is connected to the protruding terminal 43 b of the V phase bus 43, and the end of the lead conductor plate 27 is connected. Is connected to one protruding terminal 42 b of the V-phase bus ring 42. The end of the lead conductor plate 28 connected to the other phase coil 23 constituting the V phase and drawn out from the housing 11 is connected to the other protruding terminal 42 b of the V phase bus ring 42, and the lead conductor plate 27 The end is connected to the V-phase protruding terminal 46 b of the neutral point connection bus 46. Thereby, the two phase coils 23 which comprise V phase are connected in series.

  Further, the end of the lead conductor plate 28 connected to one phase coil 23 constituting the W phase and drawn out from the housing 11 is connected to the protruding terminal 45 b of the W phase bus 45, and the end of the lead conductor plate 27 is connected. Is connected to one protruding terminal 44 b of the W-phase bus ring 44. The end of the lead conductor plate 28 connected to the other phase coil 23 constituting the W phase and drawn out from the housing 11 is connected to the other protruding terminal 44b of the W phase bus ring 44, and the lead conductor plate 27 The end is connected to the W-phase protruding terminal 46 b of the neutral point connection bus 46. Thereby, the two phase coils 23 which comprise V phase are connected in series. The U-phase, V-phase, and W-phase coils are Y-connected, and the stator coil 22 is configured.

Also in the third embodiment, the U-phase bus ring 40, the V-phase bus ring 42, and the W-phase bus ring 44 are arranged in parallel with each other with respect to a plane formed by long sides having a rectangular cross section. Therefore, an increase in wiring resistance and wiring impedance at the base portions 40a, 42a, and 44a is suppressed, and generation of an induction magnetic field is suppressed.
In addition, the power supply terminals 41a, 43a, 45a of the U-phase bus 41, the V-phase bus 43, and the W-phase bus 45 are arranged in parallel with each other with respect to a plane formed by long sides having a rectangular cross section. Therefore, an increase in wiring resistance and wiring impedance at the power supply terminals 41a, 43a, and 45a is suppressed, and generation of an induction magnetic field is suppressed.

In each of the above embodiments, a magnetic inductor type synchronous rotating machine including a rotor having first and second magnetic bodies and a stator having first and second stator cores will be described. However, the rotating machine of the present invention is not limited to the magnetic inductor type synchronous rotating machine. For example, the rotor may be composed of a single magnetic material and may be wound with a field coil, or may be composed of a non-magnetic material and equipped with a permanent magnet. A single stator core may also be used.
Further, in each of the above embodiments, the phase coil is configured by concentrated winding, but the phase coil is not limited to concentrated winding, for example, distributed winding. A wave winding may also be used.

  In each of the above embodiments, the phase coil is made of a strand transition conductor formed by stacking strands and configured in two strands, and is shifted 180 degrees from the start of winding of the strand to the end of winding. However, the transition angle from the winding start to the winding end of the strand is not limited to 180 degrees, and may be 180 degrees × n (n: integer). In addition, it is preferable that a transition angle shall be 180 degree | times from a viewpoint of the ease of manufacture of a strand transition conductor. Moreover, when the problem of the circulating current flowing through the closed-loop wire pair is not considered, it is not necessary to use the wire transfer conductor.

It is sectional drawing which shows typically the structure of the supercharger for motor vehicles to which the rotary machine which concerns on Embodiment 1 of this invention is applied. It is a partially broken perspective view which shows the structure of the rotary machine which concerns on Embodiment 1 of this invention. It is a perspective view which shows the phase coil of 1 phase which comprises the stator coil applied to the rotary machine which concerns on Embodiment 1 of this invention. It is a top view which shows the bus ring in the rotary machine which concerns on Embodiment 1 of this invention. It is a perspective view explaining the arrangement | sequence state of the bus ring in the rotary machine which concerns on Embodiment 1 of this invention. It is a perspective view which shows the phase coil of 1 phase which comprises the stator coil applied to the rotary machine which concerns on Embodiment 2 of this invention. It is a perspective view explaining the arrangement | sequence state of the bus ring in the rotary machine which concerns on Embodiment 3 of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 Rotating machine, 11 Housing, 12 Bearing, 13 Rotating shaft, 14 Rotor, 15 1st magnetic body, 15a Base, 15b Salient pole, 16 2nd magnetic body, 16a Base, 16b Salient pole, 18 Stator, 19 Fixed Core, 20 First stator core, 20b Teeth (first tooth), 20c Slot (first slot), 21 Second stator core, 21b Teeth (second tooth), 21c Slot (second slot), 22 Stator coil (torque generating drive coil), 23, 35 phase coil, 24, 36 strand transition conductor, 25 slot inner conductor portion, 26 slot outer conductor portion, 27, 28 lead conductor plate (lead wire), 29 strand Wire, 30c, 31c, 32c, 41a, 43a, 45a feeding terminal, 37 flat conductor plate, 34 field coil (field magnetomotive force generating coil Le).

Claims (6)

A rotating shaft rotatably supported in the housing;
A rotor disposed in the housing and coaxially fixed to the rotation shaft;
A stator core disposed in the housing so as to surround the rotor and having teeth arranged in an equiangular pitch in the circumferential direction so as to define a slot opening on an inner peripheral side; and the stator core A stator having a wound torque generating drive coil, and
The torque generating drive coil is composed of a plurality of phase coils, and each of the plurality of phase coils has a pair of lead wires connected to the winding start and winding end,
Each of the pair of lead wires is made to have a rectangular cross section, and the plane constituted by the long sides of the rectangular cross section is parallel to each other and the plane constituted by the long sides of the rectangular cross section is the stator. A rotating machine characterized in that it extends radially outward along the end face of the iron core perpendicular to the axis of the rotating shaft and is drawn out of the housing.   Feed terminals for the torque generating drive coil connected to the lead wire drawn out of the housing are each made in a rectangular cross section, and are parallel to each other with respect to the plane formed by the long sides of the rectangular cross section. 2. The rotating machine according to claim 1, wherein the plane is formed in a state and is formed so as to be perpendicular to the axis of the rotating shaft.   The rotating machine according to claim 1 or 2, wherein each of the plurality of phase coils is wound around the teeth in a concentrated manner. Each of the plurality of phase coils is wound around the teeth in a concentrated turn for one turn, and is configured by stacking a plurality of strands to form a two-layer strand, arranged along one end surface of the teeth. A strand transfer conductor comprising a slot outer conductor portion and a pair of in-slot conductor portions that extend from the slot outer conductor portion to both sides and are respectively housed in the slots sandwiching the teeth; and A pair of lead conductor plates disposed along the other end surface and electrically connected to the end portions of the wire transition conductors extending to the other end sides of the slots on both sides,
The strands constituting the strand transition conductor are shifted by 90 degrees in one of the pair of in-slot conductor portions, the position in the strand transition conductor is maintained in the outside conductor portion of the slot, and the pair of in-slot conductors 4. The rotating machine according to claim 3, wherein the other part is further shifted by 90 degrees and is shifted by 180 degrees as a whole. Each of the plurality of phase coils is wound in one turn on the teeth in a concentrated manner, and is formed into a two-layered wire array by stacking a plurality of strands in the slots on both sides sandwiching the teeth. A pair of strand transition conductors respectively housed in each of the first and second ends of the pair of strand transition conductors disposed along one end face of the teeth and extending to one end side of the slot on both sides. A pair of flat conductor plates to be connected and a pair of electrical conductors that are disposed along the other end surfaces of the teeth and that are electrically connected to the ends of the pair of strand transition conductors that extend to the other end sides of the slots on both sides, respectively. A lead conductor plate,
The rotating machine according to claim 3, wherein the strands constituting each of the pair of strand transition conductors are shifted by 180 degrees. The rotor includes first and second magnetic bodies disposed at an equiangular pitch in the circumferential direction on the outer periphery of a cylindrical base portion having salient poles each having a rotation shaft insertion hole at an axial center position. A semi-salient pitch is shifted in the circumferential direction and arranged coaxially at a predetermined interval in the axial direction, and the rotation shaft is inserted into and fixed to the rotation shaft insertion hole.
The stator iron core is disposed so as to surround the first magnetic body, and first teeth are arranged at an equiangular pitch in the circumferential direction so as to define a first slot opened to the inner circumferential side. Second teeth are arranged at an equiangular pitch in the circumferential direction so as to define a stator core and a second slot that opens to the inner circumferential side, and spaced apart from the first stator core by a predetermined interval in the axial direction. And a second stator core disposed so as to surround the second magnetic body with the second teeth axially opposed to the first teeth,
Each of the plurality of phase coils is wound in a concentrated manner around the pair of the first tooth and the second tooth facing in the axial direction,
Further, the field magnetomotive force generating coil is wound around the rotating shaft into a cylindrical shape and is interposed between the first stator core and the second stator core. The rotating machine according to any one of claims 3 to 5, characterized in that:

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