WO2020188789A1 - Machine électrique rotative de type à entrefer axial - Google Patents

Machine électrique rotative de type à entrefer axial Download PDF

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Publication number
WO2020188789A1
WO2020188789A1 PCT/JP2019/011713 JP2019011713W WO2020188789A1 WO 2020188789 A1 WO2020188789 A1 WO 2020188789A1 JP 2019011713 W JP2019011713 W JP 2019011713W WO 2020188789 A1 WO2020188789 A1 WO 2020188789A1
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WIPO (PCT)
Prior art keywords
air gap
conductor
electric machine
rotary electric
type rotary
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Application number
PCT/JP2019/011713
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English (en)
Japanese (ja)
Inventor
潤 櫻井
酒井　亨
高橋　大作
大輔 倉井
恭永 米岡
Original Assignee
株式会社日立産機システム
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Application filed by 株式会社日立産機システム filed Critical 株式会社日立産機システム
Priority to PCT/JP2019/011713 priority Critical patent/WO2020188789A1/fr
Publication of WO2020188789A1 publication Critical patent/WO2020188789A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/24—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets axially facing the armatures, e.g. hub-type cycle dynamos
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/52—Fastening salient pole windings or connections thereto
    • H02K3/521—Fastening salient pole windings or connections thereto applicable to stators only
    • H02K3/522—Fastening salient pole windings or connections thereto applicable to stators only for generally annular cores with salient poles

Definitions

  • the present invention relates to an axial air gap type rotary electric machine.
  • the disk-shaped rotor (rotor) and the stator (stator) are arranged so that the magnetic flux planes face each other in the rotation axis direction of the rotor with a predetermined distance (air gap). .. Then, the rotor and the stator are generally arranged in a housing such as a motor casing.
  • stator The area where the stator and rotor face each other (gap area) greatly contributes to the output of this rotary electric machine. Therefore, the diameter of the rotor tends to be designed to be as large as possible for the purpose of improving the output. Further, the stator is made by arranging a plurality of core members in which coils are wound around a bobbin having flanges at both ends radially with respect to the central axis, and the collar of the bobbin of each core member is provided for the same purpose as described above. It tends to spread radially to the extent that it touches the inner peripheral surface of the housing.
  • crossovers are arranged in an annular shape not only in the air gap range but also between the outer peripheral surface of the rotor and the inner peripheral surface of the housing. Therefore, the maximum value of the outer diameter of the rotor is defined by the inner diameter of the ring formed by the crossover. In order to increase the outer diameter of the rotor in order to increase the output for such a structure, it is conceivable to use a crossover with a small wire diameter.
  • the upper limit of the current value that can be passed through a wire with a small wire diameter is also small, and even if the rotor diameter is increased, the output cannot be increased if the amount of current is small. Further, in order to increase the output by increasing the amount of current, it is necessary to increase the wire diameter of the crossover wire, but in that case, the rotor diameter must be reduced, and the output is also increased. Becomes difficult.
  • the present invention has been made in view of the above circumstances, and an object of the present invention is to provide an axial air cap type rotary electric machine capable of improving output.
  • a stator that has a rotor that rotates around the center of rotation, a plurality of core members around which a coil is wound, and is arranged so as to face the rotor through a predetermined air gap in the axial direction of the center of rotation, and the rotor.
  • a housing that houses the stator, a first conductor that is annularly arranged in the housing and connected to the coil, and a second conductor that has a larger cross-sectional area than the first conductor and one end of which is connected to a power source. It is characterized by including a conductor.
  • the cross section of the crossover (annular first conductor) connected to the coil in the housing can be reduced as compared with the conventional case, the outer diameter of the rotor can be increased and the output of the axial air gap type rotary electric machine can be increased. Can be improved. Issues, configurations and effects other than those described above will be clarified by the description of the following embodiments.
  • FIG. 1 It is one side sectional view which shows the structure of the axial air gap type rotary electric machine. It is a perspective view of the stator of the axial air gap type rotary electric machine by 1st Embodiment of this invention, and the peripheral part thereof. It is a perspective view which shows typically the core member which constitutes the stator of the axial air gap type rotary electric machine. It is a perspective view which shows typically the connection of the coil leader wire and the crossover wire of the core member of the U phase of the axial air gap type rotary electric machine according to 1st Embodiment of this invention. It is sectional drawing which shows the state which attached the crossover wire of the axial air gap type rotary electric machine by 1st Embodiment of this invention to the through hole of a housing.
  • FIG. 1 is a one-sided sectional view showing the configuration of an axial air gap type rotary electric machine 1.
  • the axial air gap type rotary electric machine 1 has two disk-shaped rotors 3a and 3b that rotate around the rotation axis AX and two rotors 3a and 3b in the axial direction of the rotation axis AX.
  • a stator 2 having a flat cylindrical shape, a shaft 4 connected so as to rotate with the two rotors 3a and 3b, and a stator 2 and rotors 3a and 3b are housed and fixed to the stator 2.
  • the two disk-shaped rotors 3a and 3b that rotate around the rotation axis AX may be configured to include either one.
  • Both end faces of the stator 2 in the axial direction of the rotation axis AX face the rotor 3a and the rotor 3b with a predetermined interval (sometimes referred to as an air gap) in the axial direction of the rotation axis AX, respectively. ..
  • FIG. 2 is a perspective view showing the configuration of the stator 2 and its peripheral portion in a state of being stored in the housing 5, and the axial end surface of the stator 2 shown in the drawing faces the rotor 3a located on the upper side in FIG. It is an end face to be used.
  • the stator 2 has a plurality of (12 in total) core members 10U, 10V, and 10W arranged radially (annular) about the rotation axis AX.
  • annular conductors 9aU, 9aV, 9aW electrically connected to the core members 10U, 10V, 10W, respectively, are arranged along the side surface of the housing 5 above the core members 10U, 10V, 10W.
  • linear conductors 9bU, 9bV, and 9bW that are electrically connected to the annular conductors 9aU, 9aV, and 9aW by the connecting conductors 9cU, 9cV, and 9cW (not shown) are formed in the through hole 5a formed in the housing 5. It is pulled out from the protective member 11 provided to the outside of the housing 5.
  • the crossover wires 9U, 9V, 9W are formed by the annular conductors 9aU, 9aV, 9aW, the linear conductors 9bU, 9bV, 9bW, and the connecting conductors 9cU, 9cV, 9cW.
  • a three-phase power supply is used as an AC power supply, and each core member 10U, 10V, 10W and each crossover line 9U, 9V, 9W are connected to each phase of the RST phase of the three-phase power supply.
  • the symbols U, V, and W at the end of the core member 10 and the crossover line 9 are based on the phases (R phase, S phase, T phase) of the three-phase power supply connected to each core member 10 and each crossover line 9. It is a code attached to distinguish the core member 10 from each crossover line 9.
  • the core members 10 in the present embodiment (12 in FIG. 2) are divided into three types of core members 10U, 10V, and 10W according to the phases (R, S, and T phases) of the connected three-phase AC power supply.
  • the core members 10U, 10V, 10W and the crossover lines 9U, 9V, 9W when it is not necessary to distinguish between the core members 10U, 10V, 10W and the crossover lines 9U, 9V, 9W, they may be referred to as the core member 10 and the crossover line 9.
  • the annular conductor 9a, the linear conductor 9b, and the connecting conductor 9c similarly to the core member 10 and the crossover wire 9, also have reference numerals U and V according to the phases (R phase, S phase, T phase) of the connected power supply. , W may be added at the end to distinguish them.
  • the core member 10 is a component that becomes an electromagnet when electric power is supplied, and is wound around the core 10a, which is a columnar member made of a magnetic material, the bobbin 10b that covers the side surface of the core 10a, and the bobbin 10b. It has a coil 10c.
  • the core 10a is a pillar body formed by laminating a plurality of rectangular electromagnetic steel plates having the same length of a long side extending in the axial direction and different lengths of a short side extending in the circumferential direction.
  • the cross section orthogonal to the central direction is substantially trapezoidal. Since the core 10a has a laminated structure of electrical steel sheets, eddy current loss at the end face in the axial direction is suppressed.
  • a non-oriented silicon steel strip is usually used as the material of the electromagnetic steel sheet, but an amorphous metal is preferable. This is because amorphous metal is a metal that does not have a crystal structure, has low iron loss in the high frequency region, and is suitable for miniaturization and weight reduction.
  • the core 10a may be manufactured not by laminating electromagnetic steel sheets but by a non-laminated body such as a compression magnetic core obtained by compression molding a magnetic powder such as iron.
  • a non-laminated body such as a compression magnetic core obtained by compression molding a magnetic powder such as iron.
  • the shape is not limited to a substantially trapezoidal cross section, and any shape such as an ellipse, a rhombus, or another polygon can be applied according to the specifications, and a shape other than a pillar can be applied.
  • the bobbin 10b has a tubular shape that includes the core 10a, and is a component that covers the side surface of the core 10a and is formed of an insulator such as resin.
  • the bobbin 10b insulates the core 10a and the coil 10c, and prevents the core 10a and the coil 10c from being short-circuited. Further, as shown in FIG. 3, collar portions 10b1 and 10b2 protruding substantially vertically from the side surface of the core 10a are provided at both ends of the bobbin 10b in the axial direction.
  • the region sandwiched between the two flange portions 10b1 and 10b2 in the axial direction of the bobbin 10b is the region around which the coil 10c is wound (winding range 10b3), and the two flange portions 10b1 and 10b2 are formed by the coil 10c. It prevents the winding from collapsing.
  • the shape of the bobbin can be arbitrarily selected according to the specifications, and an insulating sheet or an insulating coating of a coil can be applied.
  • the coil 10c is an electric wire such as copper or aluminum, and a magnet wire or the like may be applied. One end of the coil 10c is drawn out of the winding range 10b3 as a coil lead wire 10c1. The magnetic flux generated by supplying electric power to the coil 10c passes through the core 10a and is discharged from the surface of the core 10a.
  • the coils 10c provided in the core members 10U, 10V, and 10W are ⁇ -connected to the three-phase power supply via the crossover wire 9.
  • a permanent magnet in which four-pole or eight-pole magnetic poles are alternately arranged radially is fixed to the surface of the rotors 3a and 3b facing the stator 2.
  • the permanent magnet may be one disk or four or eight fan-shaped plates.
  • FIG. 4 is a perspective view schematically showing the connection between the coil leader wire 10c1 and the crossover wire 9U of the core member 10U of the U phase of the axial air gap type rotary electric machine 1 according to the first embodiment.
  • the stator 2 is formed by sequentially arranging core members 10U, 10V, and 10W in an annular shape.
  • FIG. 2 shows an example of 12 core members
  • FIG. 4 shows an example of 9 core members 10.
  • the number of core members 10 can be arbitrarily changed according to the desired motor specifications.
  • a coil leader wire 10c1 extends axially from the core member 10U and is electrically connected to the annular conductor 9aU of the crossover wire 9U.
  • the coil leader wire 10c1 extending from the core member 10 and the annular conductor 9a are connected to each other, and a total of three annular conductors 9a are arranged (the V phase and the W phase are not shown). To do).
  • FIG. 4 schematically shows the distance between the core member 10 and the crossover line 9U so as not to overlap the core member 10 and the crossover line 9U, and the coil leader wire 10c1 is longer than the actual one. It is depicted.
  • the crossover wire 9 includes an annular conductor 9a, a linear conductor 9b, and a connecting conductor 9c.
  • the annular conductor (first conductor) 9a annular conductor arranged in an annular shape along the inner peripheral surface of the housing 5 and has the same phase. It is connected by the coil leader wire 10c1 of the coil 10c to which the current of the above is supplied.
  • the linear conductor (second conductor) 9b linear conductors 9bU, 9bV, 9bW) has a larger cross section than the annular conductor 9a, and one end thereof is connected to an AC power source.
  • the connecting conductor 9c (connecting conductor 9cU, 9cV, 9cW) is a conductor connecting the other end of the linear conductor 9b and both ends of the annular conductor 9a, and is housed in a hole 5a provided in the housing 5. (See Fig. 5).
  • annular conductor 9a and the linear conductor 9b in the present embodiment are coated conductors (that is, conducting wires) (see FIG. 5).
  • the existing connection such as winding, crimping, or soldering the leader wire around the stripped portion of the annular conductor 9a of the crossover wire 9. The method can be applied.
  • the linear conductor 9b is a conductor in which one end is connected to any one of the RST phases of an AC power source (not shown) and the other end is connected to the annular conductor 9a. Therefore, it is pulled out to the outside of the housing 5 as shown in FIG.
  • the linear conductor 9b drawn out to the outside of the housing 5 is connected to a power source via a terminal block of a rotary electric machine, an inverter, or the like.
  • the connecting conductor 9c is a connecting portion that connects both ends of the annular conductor 9a and the other end of the linear conductor 9b, respectively, and in the present embodiment, the connecting portion is connected by a crimp terminal. Is.
  • the electric power supplied from the AC power source by the connecting conductor 9c is supplied from the linear conductor 9b to the annular conductor 9a via the connecting conductor 9c.
  • the connecting conductor 9c may connect only one end of the annular conductor 9a, not both ends, and the other end of the linear conductor 9b.
  • FIG. 5 is a cross-sectional view showing a state in which the crossover wire 9 of the axial air gap type rotary electric machine 1 according to the present embodiment is attached to the through hole 5a of the housing 5, and shows the positional relationship between the connecting conductor 9c and the housing 5.
  • the connecting conductor 9c is arranged in the through hole 5a in order to prevent the connecting conductor 9c from being exposed to the outside of the housing 5 and from coming into contact with the rotor 3.
  • the connecting conductor 9c can be easily fixed in the through hole 5a, and the connecting conductor 9c is covered with a protective member 11 having insulation and elasticity to prevent a short circuit.
  • the protective member 11 is a rubber bush formed of a rubber-like polymer having insulating properties and elasticity in order to easily fix the connecting conductor 9c in the through hole 5a and prevent the connecting conductor 9c from short-circuiting. Is preferable. Of course, other materials may be used as long as they have insulating properties and elasticity.
  • the housing 5 has a cylindrical side wall that covers the stator 2, and the side wall is provided with through holes 5a for the number of phases of the AC power supply (see FIG. 2).
  • each through hole 5a is formed with a large diameter hole 5aa located on the outside of the housing 5 and a small diameter hole 5ab located on the inside of the housing 5 and having a diameter smaller than that of the large diameter hole 5aa.
  • a stepped portion 5ac connecting the large-diameter hole 5aa and the small-diameter hole 5ab is formed in the central portion of the hole 5a in the axial direction. Then, the protective member 11 is inserted into the through hole 5a.
  • the protective member 11 includes a large diameter portion 11a having a shape that fits into the large diameter hole 5aa of the through hole 5a of the housing 5, and a small diameter portion 11b having a shape that fits into the small diameter hole 5ab of the through hole 5a of the housing 5.
  • a contact portion 11c that comes into contact with the stepped portion 5ac of the through hole 5a of the housing 5 and a through hole 11d in which the crossover 9 is arranged in the center are provided.
  • the through hole 11d is located on the small diameter portion 11a side of the protective member 11 and is located on the small diameter portion 11b side of the protective member 11, and has a larger diameter than the small diameter hole 11da. It is provided with a large-diameter hole 11db and a stepped portion 11dc connecting the small-diameter hole 11da and the large-diameter hole 11db.
  • the linear conductor 9b inserted into the large diameter hole 11db of the through hole 11d of the protective member 11 is pulled out from the small diameter hole 11da of the through hole 11d.
  • a part of the axial end surface of the connecting conductor 9c pulled by the linear conductor 9b and inserted into the large diameter hole 11db in the through hole 11d is brought into contact with the stepped portion 11dc in the through hole 11d.
  • the protective member 11 that houses the connecting conductor 9c in this way is inserted into the through hole 5a from the outside of the housing 5 as described above.
  • the connecting conductor 9c is arranged in the side wall of the housing 5 as described above. Therefore, contact between the connecting conductor 9c and the rotor 3 and a short circuit between the connecting conductor 9c and the housing 5 can be prevented. Further, it is possible to prevent both ends of the annular conductor 9a, one end of the linear conductor 9b, and the connecting conductor 9c from being oxidized.
  • the through holes 5a are formed on the side surface (side wall surface) of the housing 5 by the number of phases of the AC power supply.
  • the through holes 5a are housings so that three linear conductors 9bU, 9bV, and 9bW connected to the RST phase of the three-phase AC power supply can be drawn out.
  • a protective member 11 is inserted into each of the through holes 5a formed on the side surface of the fifth.
  • the open end of the small-diameter hole 5ab on the inner peripheral surface of the housing 5 is the rotor 3 rather than the axial end surface (flange portion 10b1 in the example of FIG. 5) of the core member 10 fixed in the housing 5. It is formed at a closer position (that is, above the collar portion 10b1 in FIG. 5).
  • the housing 5 is filled with a mold resin 2a that seals the stator 2 and the annular conductor 9a, and the core member 10, the annular conductor 9a, and the protective member 11 are integrally molded by the mold resin 2a.
  • the mold resin 2a penetrates into the through hole 11d of the protective member 11, and the mold resin 2a connects both ends of the annular conductor 9a, one end of the linear conductor 9b, and the connecting conductor 9c in the through hole 11d. It is integrally molded. Therefore, it is possible to prevent the connecting conductor 9c from falling off from the inner peripheral wall of the housing 5. Further, it is possible to prevent both ends of the annular conductor 9a, one end of the linear conductor 9b, and the connecting conductor 9c from being oxidized.
  • a fixing member 12 that presses the end surface of the protective member 11 protruding to the outside of the housing 5 so that the protective member 11 does not fall out of the through hole 5a due to the pressure of the mold resin 2a during molding with the mold resin 2a is attached to the housing 5. It is attached.
  • the fixing member 12 makes it possible to prevent the contact portion 11c of the protective member 11 from coming into close contact with the step portion 5ac of the housing 5 and the mold resin 2a from leaking from the through hole 5a of the housing 5.
  • the fixing member 12 is provided with a pull-out hole 12a for pulling out the linear conductor 9b, and the linear conductor 9b is pulled out to the outside of the fixing member 12 through the pull-out hole 12a.
  • the inner diameter of the drawer hole 12a is formed to be the same as the outer diameter of the linear conductor 9b. Therefore, it is possible to prevent the mold resin 2a from leaking from the through hole 11d of the protective member 11 during the molding process.
  • the fixing member 12 is removed from the housing 5 after the mold resin 2a has hardened.
  • FIG. 6 is a circuit diagram schematically showing a connection configuration of the core member 10 and the crossover line 9 of the axial air gap type rotary electric machine 1 according to the present embodiment.
  • the axial air gap type rotary electric machine 1 includes a first UV circuit, a first VW circuit, a first WU circuit, a second UV circuit, a second VW circuit, and a second WU circuit. ..
  • the first UV circuit includes a core member 10U and a core member 10V.
  • the core member 10U is connected to an annular conductor 9aU in which the coil leader wire 10c1 is connected to the R phase of the three-phase power supply.
  • the other end of the coil 10cU of the core member 10U is connected to the end of the coil 10cV of the adjacent core member 10V.
  • the coil leader wire 10c1 of the core member 10V is connected to the annular conductor 9aV connected to the power supply terminal of the S phase. That is, the first UV circuit forms a circuit that connects the R phase of the three-phase AC power supply, the core member 10U, the core member 10V, and the S phase of the three-phase AC power supply in series.
  • the first WU circuit includes a core member 10W and a core member 10U.
  • the core member 10W is a core member 10W arranged next to the core member 10V of the first UV circuit, and is connected to an annular conductor 9aW in which the coil leader line 10c1 is connected to the T phase.
  • the other end of the coil 10cW of the core member 10W is connected to the end of the coil 10cU of the adjacent core member 10U.
  • the coil leader wire 10c1 of the core member 10U is connected to the annular conductor 9aU connected to the power supply terminal of the R phase. That is, the first WU circuit forms a circuit that connects the T phase of the three-phase AC power supply, the core member 10W, the core member 10U, and the R phase of the three-phase AC power supply in series.
  • the first VW circuit includes a core member 10V and a core member 10W.
  • the core member 10V is a core member 10V arranged next to the core member 10U of the first WU circuit, and is connected to an annular conductor 9aV in which the coil leader line 10c1 is connected to the S phase.
  • the other end of the coil 10cV of the core member 10V is connected to the end of the coil 10cW of the adjacent core member 10W.
  • the coil leader wire 10c1 of the core member 10W is connected to the annular conductor 9aW connected to the power supply terminal of the T phase.
  • the first VW circuit forms a circuit that connects the S phase of the three-phase AC power supply, the core member 10V, the core member 10W, and the T phase of the three-phase AC power supply in series.
  • a ⁇ connection is formed by these three circuits (the first UV circuit, the first WU circuit, and the first VW circuit).
  • the second UV circuit includes a core member 10U and a core member 10V.
  • the core member 10U is a core member 10U arranged next to the core member 10W of the first VW circuit, and is connected to the annular conductor 9aU.
  • the other end of the coil 10cU of the core member 10U is connected to the end of the coil 10cV of the adjacent core member 10V.
  • the coil leader wire 10c1 of the core member 10V is connected to the annular conductor 9aV. That is, the second UV circuit forms a circuit in which the R phase of the three-phase AC power supply, the core member 10U, the core member 10V, and the S phase of the three-phase AC power supply are connected in series. Therefore, the core member 10U and the core member 10V of the first UV circuit and the core member 10U and the core member 10V of the second UV circuit are connected in parallel between the R phase and the S phase.
  • the second WU circuit includes a core member 10W and a core member 10U.
  • the core member 10W is a core member 10W arranged next to the core member 10V of the second UV circuit, and is connected to the annular conductor 9aW.
  • the other end of the coil 10cW of the core member 10W is connected to the end of the coil 10cU of the adjacent core member 10U.
  • the coil leader wire 10c1 of the core member 10U is connected to the annular conductor 9aU. That is, the second WU circuit forms a circuit that connects the T phase of the three-phase AC power supply, the core member 10W, the core member 10U, and the R phase of the three-phase AC power supply in series. Therefore, the core member 10W and the core member 10U of the first WU circuit and the core member 10W and the core member 10U of the second WU circuit are connected in parallel between the T phase and the R phase.
  • the second VW circuit includes a core member 10V and a core member 10W.
  • the core member 10V is a core member 10V arranged next to the core member 10U of the second WU circuit, and is connected to the annular conductor 9aV.
  • the other end of the coil 10cV of the core member 10V is connected to the end of the coil 10cW of the adjacent core member 10W.
  • the coil leader wire 10c1 of the core member 10W is connected to the annular conductor 9aW. That is, the second VW circuit forms a circuit that connects the S phase, the core member 10V, the core member 10W, and the T phase in series.
  • the core member 10V and the core member 10W of the first VW circuit and the core member 10V and the core member 10W of the second VW circuit are connected in parallel between the S phase and the T phase. Therefore, a parallel ⁇ connection in which the two core members 10 are connected in series is formed.
  • FIG. 7 is a circuit diagram schematically showing a connection configuration of a core member 10 and a crossover line 109 of an axial air gap type rotary electric machine 100 according to a comparative example.
  • FIG. 8 is a cross-sectional view showing a state in which the crossover line 109 of the axial air gap type rotary electric machine 100 according to the comparative example is attached to the through hole 105a of the housing 105.
  • the crossover wire 109 according to the comparative example does not have a connecting conductor 9c and is composed of one conducting wire, linear conductors 109b are provided at both ends of the annular conductor 109a. Therefore, since the number of the linear conductors 109b is two, as shown in FIG. 8, a through hole 105a into which each of the six protective members 11 is inserted is provided on the side surface of the housing 105, and the six linear conductors are provided. 109b is pulled out of the housing 105.
  • two of the linear conductors 109bU are connected to the R-phase terminals of the AC power supply, and two of the linear conductors 109bV are connected to the S-phase terminals of the AC power supply.
  • Two of the linear conductors 109bW are connected to the T-phase terminal of the AC power supply. That is, as shown in FIG. 7, two linear conductors 109bU are connected to the R-phase terminal of the AC power supply, and two linear conductors 109bV are connected to the S-phase terminal of the AC power supply.
  • Two linear conductors 109bW are connected to the T-phase terminal of the power supply.
  • the linear conductors 109bU, 109bV and 109bW are connected to each other by coils 10cU, 10cV and 10cW as shown in FIG. Therefore, the two linear conductors 109b connected to each terminal of the RST phase of the AC power supply form a parallel circuit, and the voltage of the electric power supplied from each terminal to the two linear conductors 109b is constant. Further, the linear conductor 109b and the annular conductor 109a have the same wire diameter. Therefore, if the annular conductor 109a is thinned to increase the outer diameter of the rotor 3, the wire diameter of the linear conductor 109b connected to the AC power supply is also thinned, and the resistance of the crossover wire 109 is increased.
  • the axial air gap type rotary electric machine 100 has a limit in reducing the wire diameter of the annular conductor 109a.
  • the crossover wire 9 according to the first embodiment of the present invention has linear conductors 9bU, 9bV, and 9bW, which are single wires, connected to each terminal of the RST phase of the AC power supply. Both ends of the annular conductor 9a are connected to the conductor 9b via a connecting conductor 9c (see FIG. 4).
  • the annular conductors 9aU, 9aV, 9aW (first conductor) and the linear conductors 9bU, 9bV, 9bW (second conductor) are different conductors, only the linear conductors 9bU, 9bV, 9bW A conductor having a large cross section can be used. Therefore, the upper limit of the current I flowing through the linear conductors 9bU, 9bV, 9bW can be increased to increase the current value flowing through the annular conductors 9aU, 9aV, 9aW and the coils 10cU, 10cV, 10cW.
  • the wire diameter of the linear conductor 9b is made larger than the wire diameter of the annular conductor 9a.
  • the amount of current supplied to the annular conductor 9a can be adjusted by the resistance value of the linear conductor 9b, that is, the wire diameter of the linear conductor 9b. That is, even if the wire diameter of the annular conductor 9a is reduced, the decrease in the current flowing through the annular conductor 9a can be prevented by increasing the current supplied from the linear conductor 9b to the annular conductor 9a, which is the same size as the conventional one.
  • a current can be passed through the annular conductor 9a. Further, since the wire diameter of the linear conductor 9b can be increased, the resistance of the linear conductor 9b can be reduced, and the current flowing through the linear conductor 9b can be increased, the wire diameter of the annular conductor 9a is the same as the conventional wire diameter. However, a larger current can be passed.
  • the wire diameter of the annular conductor 9a is made larger than the wire diameter of the annular conductor 9a, so that the wire diameter of the annular conductor 9a is made larger than before. Can also be reduced, so that the outer diameter of the rotor 3 can be increased.
  • the cross section of the crossover 109 according to the comparative example is 2.0 sq
  • the cross section 9 according to the first embodiment of the present invention has a cross section of the linear conductor 9b of 5.5 sq and is annular.
  • the cross section of the conductor 9a can be 1.25 sq. Therefore, according to the first embodiment of the present invention, the annular conductor 9a (crossover wire 9 in the housing 5) can be made thinner than the conventional annular conductor 109a, and the outer diameter of the rotor 3 can be increased. Can be done.
  • FIG. 9 is a cross-sectional view of the axial air gap type rotary electric machine 100 according to a comparative example.
  • the inner diameter ⁇ A of the housing 105 is the wire diameter ⁇ C of the annular conductor 109a, the gap ⁇ 1 between the rotor 3 and the annular conductor 109a, the gap ⁇ 2 between the housing 105 and the annular conductor 109a, and the outer diameter of the rotor 3. It is the value obtained by adding ⁇ B. Then, in order to prevent interference between the rotor 3 and the annular conductor 109a, the gap ⁇ 1 has a minimum value, and the gap ⁇ 1 cannot be made smaller than that value.
  • the gap ⁇ 2 (including the coating thickness of the annular conductor 109a) is eliminated. It is not possible.
  • the wire diameter ⁇ C of the annular conductor 109a can be reduced by the present invention. Therefore, according to the present invention, the outer diameter ⁇ B of the rotor 3 can be increased, the gap area can be expanded, and high output and high efficiency can be realized.
  • the wire diameter of the annular conductor 9a can be reduced by increasing the wire diameter of the linear conductor 9b, so that the outside of the rotor 3 The diameter can be increased. Since the connecting conductor 9c connecting the annular conductor 9a and the linear conductor 9b is located inside the through hole 5a on the side wall of the housing 5 and not inside the housing 5, the outer diameter of the rotor 3 can be increased. As a result, the axial air gap type rotary electric machine 1 according to the first embodiment can expand the gap area, and can realize high output and high efficiency.
  • the annular conductor 9a and the linear conductor 9b of the crossover wire 9 can be manufactured separately, the annular conductor 9a matching the inner diameter of the housing 5 is prepared in advance. be able to. Therefore, unlike the annular conductor 109a of the comparative example, the arrangement can be performed without adjusting the length and the positional relationship with the coil leader wire 10c1 at the time of assembly, and the work efficiency can be improved.
  • the number of through holes 5a for pulling out the linear conductor 9b to the outside of the housing 5 is the same as the number of phases of the AC power supply. Can be. Therefore, the number of through holes in the comparative example is halved, and the manufacturing cost can be reduced. Further, the number of linear conductors drawn out from the through holes is also halved, the man-hours for pulling out the linear conductors from the through holes can be reduced, and the assembly work efficiency can be improved.
  • the connecting conductor 9c by covering the connecting conductor 9c with the protective member 11 which is an insulating cushioning material, it is possible to prevent the connecting conductor 9c from being short-circuited with the housing 5. Further, by integrally molding the stator 2 and the annular conductor 9a with the housing with the mold resin 2a, the stator 2 and the annular conductor 9a can be fixed, and interference with the rotor 3 can be prevented. Therefore, the axial air gap type rotary electric machine 1 according to the first embodiment has a highly reliable configuration.
  • the protective member 11 which is an insulating cushioning material is in close contact with the inner circumference of the through hole 5a, it is possible to prevent the mold resin 2a from leaking out of the housing 5 during the molding process. Further, since the insulating cushioning material is the protective member 11, the manufacturing cost can be suppressed.
  • the core member 10 has a bobbin 10b around which the coil 10c is wound, the bobbin 10b has flanges 10b1 and 10b2 located on the rotor 3 side in the axial direction of the rotation axis AX, and the annular conductor 9a is the rotation axis. It is arranged on the rotor 3 side of the bobbin 10b1 in the axial direction of the AX.
  • the annular conductor 9a can be arranged after the core member 10 is arranged in the housing 5, the work efficiency can be improved at the time of manufacturing the axial air gap type rotary electric machine.
  • three connecting conductors 9c are provided and three through holes 5a are provided in the housing 5 in order to utilize the widely used three-phase AC power supply. This makes it possible to improve the versatility of the rotary electric machine. Further, if a conducting wire is used as the annular conductor 9a and the linear conductor 9b, the manufacturing cost of rotating electricity can be suppressed.
  • FIG. 10 is a cross-sectional perspective view showing the relationship between the crossover line 9 and the stator 2 of the axial air gap type rotary electric machine 20 according to the second embodiment of the present invention
  • FIG. 11 shows the shaft 4 and the rotor 3a in FIG. It is an added figure (the block diagram of the axial air gap type rotary electric machine according to the 2nd Embodiment of this invention).
  • the annular conductor 9a is arranged on the rotor 3a side of the flange portion 10b1 in the axial direction of the rotation axis AX, but in the present embodiment, the two flange portions are arranged in the axial direction of the rotation axis AX. It is characterized in that the annular conductor 9a is arranged so as to be located between 10b1 and 10b2. That is, the annular conductor 9a is arranged inside the winding range 10b3 shown in FIG. In the present embodiment, as shown in FIG. 10, a region in which the number of turns of the coil 10c is relatively small as compared with other places is provided between the two flange portions 10b1 and 10b2 along the side surface of the housing 5.
  • Three annular conductors 9a are arranged in the region.
  • a core member 10 in which a coil 10c is wound in a stepwise manner around a bobbin 10b having collar portions 10b1 and 10b2. That is, the coil 10c is wound by aligned winding starting from the base portion of the winding range 10b3 of the flange portion 10b1 or the flange portion 10b2. Further, the coil 10c is wound so that the number of turns per layer is reduced by one turn as the coil is wound outward so as to be separated from the collar portion 10b1 and the collar portion 10b2 in a stepped manner. ..
  • the first layer coil 10c is started to be wound from the base of either the collar portion 10b1 or the collar portion 10b2, and then wound to the base portion of the other collar portion 10b1 or the collar portion 10b2.
  • the second layer is folded and wound so as to be arranged between the coils 10c of the first layer as much as possible.
  • the second layer coil 10c that is folded back and wound to the other flange portion 10b1 or the collar portion 10b2 side is wound between the coils 10c that are wound in the next turn of the coil 10c that starts winding the first layer. At the end, it is folded back to the third layer winding.
  • the fourth layer, the fifth layer, and the sixth layer are each wound by subtracting one turn from the number of turns of the adjacent layers.
  • the coil 10c forms a step winding forming a predetermined angle between the flange portion 10b1 and the flange portion 10b2. Then, a region without winding is formed between the flange portion 10b1 and the flange portion 10b2 and the step winding, and three annular conductors 9a are arranged in the region.
  • the open end of the through hole 25a formed in the inner wall of the housing 25 also rotates. It is located between the two flanges 10b1 and 10b2 in the axial direction of the axial center AX. That is, the open end of the through hole 25a is located closer to the coil 10c than the axial end surface of the core member 10 fixed in the housing 25 (the collar portion 10b1 in the example of FIG. 10) (that is, below the collar portion 10b1 in FIG. 10). ) Is formed.
  • the coil leader wire 10c1 of the present embodiment is not drawn out of the winding range 10b3 as shown in FIG. 4, but is connected to the annular conductor 9a in the winding range 10b3. This eliminates the need for a wiring piece used to wire the coil leader wire 10c1 drawn out of the winding range 10b3 and the linear conductor 9b of the crossover wire 9 to the outside of the bobbin 10b. Therefore, the manufacturing cost and the work man-hours can be reduced.
  • the annular conductor 9a is arranged so as to be located between the two flange portions 10b1 and 10b2 in the axial direction of the rotation axis AX. did. That is, the annular conductor 9a is arranged along the side surface of the housing 5 inside the winding range 10b3 sandwiched between the flange portions 10b1 and 10b2 at both ends of the bobbin 10b.
  • the annular conductor 9a When the annular conductor 9a is arranged in this way, the annular conductor 9a does not exist in the range where the outer circumference of the rotor 3 and the inner circumference of the housing 5 face each other, and the outer diameter of the rotor 3 is made as close as possible to the inner circumference of the housing 5.
  • the outer diameter of the rotor 3 can be made larger than that of the first embodiment.
  • the axial air gap type rotary electric machine 20 according to the second embodiment can realize the maximization of the gap area in the housing 5 having a predetermined inner diameter, and can realize high output and high efficiency. Further, since the rotor 3 and the crossover 9 are separated by the flange portion 10b1, they do not interfere with each other. Therefore, the axial air gap type rotary electric machine 20 according to the second embodiment has a highly reliable configuration.
  • the present invention is not limited to the above-described embodiment, and includes various modifications.
  • the above-described embodiment has been described in detail in order to explain the present invention in an easy-to-understand manner, and is not necessarily limited to the one including all the described configurations.
  • it is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment and it is also possible to add the configuration of another embodiment to the configuration of one embodiment.
  • the embodiment of the present invention may have the following aspects.
  • the rotors 3a and 3b are arranged to face each other on both end faces of the stator 2, but the rotor 3a or the rotor 3b is arranged to face only one of the end faces of the two stators 2 and axially.
  • the length of the air gap type rotary electric machine in the rotation axis AX direction may be shortened.
  • the connecting conductor 9c is housed in the through hole 5a of the housing 5 via the protective member 11, the connecting conductor 9c may be housed in the wiring hole 5a of the housing 5 with a varnish or an adhesive.
  • a circular conductor 39a having a rectangular cross-sectional shape for example, a strip-shaped ribbon wire or a thin-walled cylinder having a rectangular cross-sectional shape of the conductor may be used.
  • the annular conductor in the radial direction of the rotor 3 is more annular than the one having a circular cross-sectional shape like the annular conductor 9a of the above embodiment. Since the length of the conductor can be reduced, it is easy to secure a large outer diameter of the rotor 3. That is, it is possible to expand the gap area and realize high output and high efficiency.
  • the annular conductor 9a is not limited to the ring shown in FIG. 4 and the like, and is formed by a polygonal ring having the same number of sides as the core member 10. You may.
  • a dodecagonal ring may be arranged between the inner circumference of the housing 25, the flange portion 10b1, and the side surface of the stator 2. Further, if it is arranged in the air gap along the inner peripheral surface of the housing, it may be formed by a polygonal ring different from the number of sides of the number of core members 10.
  • the circular conductor 9a may be mixed with a round wire, a ribbon wire, a thin-walled ring, a thin-walled polygonal ring, or the like.
  • the annular conductors 9a may be mixed instead of being arranged between the two flange portions 10b1 and 10b2 and either outside.
  • a configuration may be adopted in which only the annular conductor 9aW is arranged between the two flange portions 10b1, 10b2, and the remaining annular conductors 9aU, 9aV are arranged outside the two flange portions 10b1, 10b2.
  • the heat generated from the three annular conductors 9a can be dispersed inside and outside the two flange portions 10b1 and 10b2.
  • the axial air gap type rotary electric machine 1 can be used as a generator if rotational power is supplied without supplying electric power.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)

Abstract

L'invention concerne une machine électrique rotative de type à entrefer axial ayant une sortie de couple améliorée.　La présente invention est caractérisée en ce qu'elle comprend : un rotor (3) qui tourne autour d'un axe de rotation AX ; un stator (2) ayant une pluralité d'éléments de noyau (10), autour duquel une bobine (10c) est enroulée, et disposé de façon à faire face au rotor (3) avec un entrefer prédéterminé entre ceux-ci dans une direction axiale de l'axe de rotation (AX) ; un boîtier (5) qui reçoit le rotor (3) et le stator (2) ; un premier conducteur (9a) disposé à l'intérieur du boîtier (5) dans une forme annulaire et relié à la bobine (10c) ; et un second conducteur (9b) qui a une aire de section transversale plus grande que le premier conducteur (9a) et dont une partie d'extrémité est connectée à une source d'alimentation.
PCT/JP2019/011713 2019-03-20 2019-03-20 Machine électrique rotative de type à entrefer axial WO2020188789A1 (fr)

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PCT/JP2019/011713 WO2020188789A1 (fr) 2019-03-20 2019-03-20 Machine électrique rotative de type à entrefer axial

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PCT/JP2019/011713 WO2020188789A1 (fr) 2019-03-20 2019-03-20 Machine électrique rotative de type à entrefer axial

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023151753A1 (fr) * 2022-02-14 2023-08-17 Schaeffler Technologies AG & Co. KG Machine à flux axial électrique

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016096705A (ja) * 2014-11-17 2016-05-26 日本電産株式会社 モータ
JP2016178833A (ja) * 2015-03-20 2016-10-06 スズキ株式会社 アキシャルギャップ型の回転電機
JP2016208794A (ja) * 2015-04-28 2016-12-08 日本電産株式会社 モータ
JP2017204960A (ja) * 2016-05-12 2017-11-16 スズキ株式会社 回転電機

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016096705A (ja) * 2014-11-17 2016-05-26 日本電産株式会社 モータ
JP2016178833A (ja) * 2015-03-20 2016-10-06 スズキ株式会社 アキシャルギャップ型の回転電機
JP2016208794A (ja) * 2015-04-28 2016-12-08 日本電産株式会社 モータ
JP2017204960A (ja) * 2016-05-12 2017-11-16 スズキ株式会社 回転電機

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023151753A1 (fr) * 2022-02-14 2023-08-17 Schaeffler Technologies AG & Co. KG Machine à flux axial électrique

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