WO2015040482A2 - Dispositif de chauffage de couronne rotor, et procédé d'ajustage serré de couronne rotor - Google Patents

Dispositif de chauffage de couronne rotor, et procédé d'ajustage serré de couronne rotor Download PDF

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Publication number
WO2015040482A2
WO2015040482A2 PCT/IB2014/002016 IB2014002016W WO2015040482A2 WO 2015040482 A2 WO2015040482 A2 WO 2015040482A2 IB 2014002016 W IB2014002016 W IB 2014002016W WO 2015040482 A2 WO2015040482 A2 WO 2015040482A2
Authority
WO
WIPO (PCT)
Prior art keywords
rotor core
magnetic flux
heating device
axial direction
flux shielding
Prior art date
Application number
PCT/IB2014/002016
Other languages
English (en)
Other versions
WO2015040482A3 (fr
Inventor
Nobutaka NIBE
Masayuki Matsushita
Koji Yamada
Hiroaki Urano
Kohei Yoshida
Original Assignee
Toyota Jidosha Kabushiki Kaisha
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2014004421A external-priority patent/JP5874747B2/ja
Priority claimed from JP2014019763A external-priority patent/JP5888351B2/ja
Application filed by Toyota Jidosha Kabushiki Kaisha filed Critical Toyota Jidosha Kabushiki Kaisha
Priority to CN201480051084.XA priority Critical patent/CN105556810B/zh
Priority to US15/022,684 priority patent/US20160233750A1/en
Publication of WO2015040482A2 publication Critical patent/WO2015040482A2/fr
Publication of WO2015040482A3 publication Critical patent/WO2015040482A3/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/12—Impregnating, heating or drying of windings, stators, rotors or machines
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • H02K15/024—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies with slots
    • H02K15/028—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies with slots for fastening to casing or support, respectively to shaft or hub

Definitions

  • the present invention relates to a rotor core heating device and a rotor core shrink-fitting method.
  • a rotor core is a component of a motor.
  • the motor is constituted by a shaft rotatably supported in a sealed case and having a rotor formed integrally at one end portion, a rotor core externally fitted on the shaft, and a stator fixed to the sealed case side to face the outer peripheral surface of the rotor with a predetermined gap therebetween.
  • a shrink-fitting method is known as a method of externally fitting the rotor core.
  • the rotor core is heated by a rotor core heating device, and the heated rotor core is cooled after being fitted onto the shaft.
  • JP 07-022168 A Japanese Patent Application Publication No. 07-022168 A
  • JP 2013-102622 A disclose a rotor core heating device including a first heater that heats the inner peripheral side surface of a hollow cylindrical rotor core with a coil through induction heating, and a second heater that heats the outer peripheral side surface of the hollow cylindrical rotor core with a coil through induction heating.
  • FIG. 10A and FIG. 10B The configuration of a rotor core heating device 500 according to the related art represented by JP 07-022168 A will be described with reference to FIG. 10A and FIG. 10B.
  • FIG. 10A and FIG. 10B the configuration of the rotor core heating device 500 according to the related art is schematically illustrated as viewed in a cross section. In the following, description is made with reference to the axial direction indicated in FIG. 10A and FIG. 10B.
  • the rotor core heating device 500 is a device that heats a rotor core 550 through induction heating to shrink-fit the rotor core 550 onto a shaft (not illustrated).
  • the rotor core heating device 500 includes an inner coil 510, an outer coil 520, and an induction heater (not illustrated).
  • the rotor core 550 is formed to have a cylindrical shape, and includes a hollow portion 560 formed to extend in the axial direction (see FIG. 10A).
  • the rotor core 550 is constituted by stacking a plurality of steel plates.
  • the inner coil 510 is formed to have a spiral shape, and disposed on the inner peripheral side of the rotor core 550 (in the hollow portion 560).
  • the inner coil 510 is disposed in the hollow portion 560 so as to extend spirally in the axial direction.
  • the outer coil 520 is formed to have a spiral shape, and disposed on the outer peripheral side of the rotor core 550.
  • the outer coil 520 is disposed around the outer periphery of the rotor core 550 so as to extend spirally in the axial direction.
  • the induction heater applies an alternating current to the inner coil 510 and the outer coil 520 to generate magnetic force lines around the inner coil 510 and the outer coil 520.
  • the length of the rotor core 550 in the axial direction is generally the same as the length of the inner coil 510 and the outer coil 520 in the axial direction.
  • the length of a rotor core 580 in the axial direction is shorter than the length of the inner coil 510 and the outer coil 520 in the axial direction.
  • FIG. 11 The function of the rotor core heating device 500 according to the related art will be described with reference to FIG. 11.
  • the function of the rotor core heating device 500 according to the related art is schematically illustrated as viewed in the cross-section.
  • the length of the rotor core 580 in the axial direction is shorter than the length of the inner coil 510 and the outer coil 520 in the axial direction.
  • the length of the rotor core 580 in the axial direction is shorter than the length of the inner coil 510 and the outer coil 520 in the axial direction.
  • magnetic flux concentrates on the upper end surface of the rotor core 580 in the axial direction (location C in FIG. 11), which may cause a curl of a steel plate positioned at the upper end portion of the rotor core 580 due to abnormal heat generation.
  • the curled steel plate is thermally insulated from the other steel plates.
  • the steel plate is further curled to reach a plastic region, which may deform the rotor core 580.
  • the present invention provides a rotor core heating device and a rotor core shrink-fitting method capable of accommodating differences in length of a rotor core in the axial direction.
  • a rotor core heating device is configured to heat an inner peripheral side surface and an outer peripheral side surface of a rotor core through induction heating.
  • the rotor core has a hollow cylindrical shape.
  • the rotor core heating device includes a first coil, a second coil and a magnetic flux shielding jig.
  • the first coil is disposed inside the rotor core and is configured to heat the inner peripheral side surface of the rotor core through induction heating.
  • the second coil is disposed outside the rotor core and is configured to heat the outer peripheral side surface of the rotor core through induction heating.
  • the magnetic flux shielding jig has a hollow cylindrical shape and is disposed opposite a first end surface of the rotor core with a gap provided between the first end surface and the magnetic flux shielding jig in an axial direction of the rotor core.
  • the magnetic flux shielding jig may include a first magnetic flux shielding jig that is opposite to the first end surface, and a second magnetic flux shielding jig that is opposite to a second end surface of the rotor core.
  • the first magnetic flux shielding jig is disposed with the gap provided between the first end surface and the first magnetic flux shielding jig in the axial direction.
  • the second magnetic flux shielding jig is disposed with a gap provided between the second end surface and the second magnetic flux shielding jig in the axial direction. Furthermore, both ends of the first coil in the axial direction may project from the rotor core.
  • a through portion that penetrates in the axial direction may be formed in the magnetic flux shielding jig.
  • the magnetic flux shielding jig may be made of copper.
  • a rotor core shrink-fitting method includes: heating a rotor core with the rotor core heating device according to the first aspect of the present invention to increase an inside diameter of the rotor core; and shrink-fitting the rotor core, an inside diameter of which has been increased, onto a shaft to fasten the rotor core to the shaft.
  • FIG. 1 is a schematic view illustrating the configuration of a rotor core heating device according to a first embodiment of the present invention
  • FIG. 2 is a schematic view illustrating the function of the rotor core heating device according to the first embodiment of the present invention
  • FIG. 3 is a schematic view illustrating the function of the rotor core heating device according to the first embodiment of the present invention
  • FIG. 4 is a schematic view illustrating the configuration of a rotor core heating device according to a second embodiment of the present invention.
  • FIG. 5 is a schematic view illustrating the function of the rotor core heating device according to the second embodiment of the present invention.
  • FIG. 6A is a schematic view illustrating the configuration of a magnetic flux shielding jig according to a third embodiment of the present invention.
  • FIG. 6B is a schematic view illustrating the configuration of a rotor core according to the third embodiment of the present invention.
  • FIG. 7 is a schematic view illustrating the configuration of a rotor core heating device according to the third embodiment of the present invention.
  • FIG. 8 is a schematic view illustrating the function of the rotor core heating device according to the third embodiment of the present invention.
  • FIG. 9A is a schematic view illustrating the configuration of another magnetic flux shielding jig according to a fourth embodiment of the present invention.
  • FIG. 9B is a schematic view illustrating the configuration of a rotor core according to the fourth embodiment of the present invention.
  • FIG. 10A is a schematic view illustrating the configuration of a rotor core heating device according to the related art
  • FIG. 10B is a schematic view illustrating the configuration of a rotor core heating device according to the related art.
  • FIG. 11 is a schematic view illustrating the function of the rotor core heating device according to the related art.
  • FIG. 1 The configuration of a rotor core heating device 100 will be described with reference to FIG. 1.
  • FIG. 1 the configuration of the rotor core heating device 100 is schematically illustrated as viewed in the cross-section. In the following, description is made with reference to the axial direction indicated in FIG. 1.
  • the rotor core heating device 100 is a rotor core heating device according to a first embodiment of the present invention.
  • the rotor core heating device 100 is a device that heats a rotor core 150 through induction heating to shrink-fit the rotor core 150 onto a shaft (not illustrated).
  • the rotor core 150 is a component of a motor (not illustrated).
  • the motor is constituted by a shaft (not illustrated), the rotor core 150 externally fitted on the shaft, and a stator (not illustrated).
  • the shaft is rotatably supported in a sealed case (not illustrated) and has a rotor formed integrally at one end portion.
  • the stator is fixed to the sealed case side to face the outer peripheral surface of the rotor with a predetermined gap therebetween.
  • a shrink-fitting method is known as a method of externally fitting the rotor core 150.
  • the rotor core 150 is heated by the rotor core heating device 100, and the heated rotor core 150 is cooled after being fitted onto the shaft.
  • the rotor core heating device 100 includes an inner coil 110, an outer coil 120, an induction heater (not illustrated), and a magnetic flux shielding jig 170.
  • the rotor core 150 is formed to have a cylindrical shape, and includes a hollow portion 160 formed to extend in the axial direction.
  • the rotor core 150 is constituted by stacking a plurality of steel plates.
  • the inner coil 110 is formed to have a spiral shape, and disposed on the inner peripheral side of the rotor core 150 (in the hollow portion 160).
  • the inner coil 110 is disposed in the hollow portion 160 so as to extend spirally in the axial direction.
  • the outer coil 120 is formed to have a spiral shape, and disposed on the outer peripheral side of the rotor core 150.
  • the outer coil 120 is disposed around the outer periphery of the rotor core 150 so as to extend spirally in the axial direction.
  • the induction heater applies an alternating current to the inner coil 110 and the outer coil 120 to generate magnetic force lines around the inner coil 110 and the outer coil 120.
  • the magnetic flux shielding jig 170 is formed to have a cylindrical shape, and includes a hollow portion 180 formed to extend in the axial direction.
  • the magnetic flux shielding jig 170 is made of copper.
  • the cross-sectional shape of the magnetic flux shielding jig 170 as viewed in the axial direction is generally the same as the cross-sectional shape of the rotor core 150.
  • the magnetic flux shielding jig 170 is disposed above the rotor core 150 in the axial direction when the rotor core 150 is heated by the rotor core heating device 100.
  • the magnetic flux shielding jig 170 is disposed with a gap provided between the rotor core 150 and the magnetic flux shielding jig 170 so as not to contact the rotor core 150.
  • the sum of the length of the magnetic flux shielding jig 170 in the axial direction and the length of the rotor core 150 in the axial direction is generally the same as the length of the inner coil 110 and the outer coil 120 in the axial direction.
  • the length of the inner coil 110 and the outer coil 120 in the axial direction is generally the same as the length of the longest rotor core, among rotor cores assumed to be heated, in the axial direction.
  • the outer shape of the magnetic flux shielding jig 170 is generally the same as the outer shape of the rotor core 150, the outside diameter of the magnetic flux shielding jig 170 may be larger than the outside diameter of the rotor core 150.
  • FIG. 2 and FIG. 3 the function of the rotor core heating device 100 is schematically illustrated as viewed in the cross-section.
  • magnetic flux lines are indicated by dash-double-dot lines.
  • the rotor core 150 disposed in the vicinity is affected by the magnetic force lines so that an eddy current flows in the rotor core 150.
  • Joule heat is generated because of the electrical resistance of the rotor core 150 so that the rotor core 150 is self-heated.
  • the magnetic flux shielding jig 170 is disposed above the rotor core 150 in the axial direction, and therefore concentration of magnetic flux on the upper end surface of the rotor core 150 in the axial direction is prevented. Magnetic flux is distributed as if the length of the rotor core 150 in the axial direction were generally the same as the length of the inner coil 110 and the outer coil 120 in the axial direction.
  • differences in length of the rotor core 150 in the axial direction can be accommodated by preparing a plurality of types of the magnetic flux shielding jig 170 such that the sum of the length of a magnetic flux shielding jig 170 in the axial direction and the length of the rotor core 150 in the axial direction is generally the same as the length of the inner coil 110 and the outer coil 120 in the axial direction for each set of the inner coil 110 and the outer coil 120.
  • the magnetic flux shielding jig 170 is made of cupper.
  • the present invention is not limited thereto.
  • the magnetic flux shielding jig 170 is made of any magnetic material such as iron, the same function and effect as those of the first embodiment can be obtained.
  • the sum of the length of the magnetic flux shielding jig 170 in the axial direction and the length of the rotor core 150 in the axial direction is generally the same as the length of the inner coil 110 and the outer coil 120 in the axial direction.
  • the present invention is not limited thereto.
  • the sum of the length of the magnetic flux shielding jig 170 in the axial direction and the length of the rotor core 150 in the axial direction may be longer than the length of the inner coil 110 and the outer coil 120 in the axial direction.
  • the sum of the length of the magnetic flux shielding jig 170 in the axial direction and the length of the rotor core 150 in the axial direction may be shorter than the length of the inner coil 110 and the outer coil 120 in the axial direction. In either case, the same function and effect as those of the first embodiment can be obtained.
  • FIG. 4 the configuration of the rotor core heating device 200 is schematically illustrated as viewed in the cross-section. In the following, description is made with reference to the axial direction indicated in FIG. 4.
  • the rotor core heating device 200 is a rotor core heating device according to a second embodiment of the present invention.
  • the rotor core heating device 200 is a device that heats a rotor core 250 through induction heating to shrink-fit the rotor core 250 onto a shaft (not illustrated).
  • the rotor core 250 is a component of a motor (not illustrated).
  • the motor is constituted by a shaft (not illustrated), the rotor core 250 externally fitted on the shaft, and a stator (not illustrated).
  • the shaft is rotatably supported in a sealed case (not illustrated) and has a rotor formed integrally at one end portion.
  • the stator is fixed to the sealed case side to face the outer peripheral surface of the rotor with a predetermined gap therebetween
  • a shrink-fitting method is known as a method of externally fitting the rotor core 250.
  • the rotor core 250 is heated by the rotor core heating device 200, and the heated rotor core 250 is cooled after being fitted onto the shaft.
  • the rotor core heating device 200 includes an inner coil 210, an outer coil
  • the rotor core 250 is formed to have a cylindrical shape, and includes a hollow portion 260 formed to extend in the axial direction.
  • the rotor core 250 is constituted by stacking a plurality of steel plates.
  • the inner coil 210 is formed to have a spiral shape, and disposed on the inner peripheral side of the rotor core 250 (in the hollow portion 260).
  • the inner coil 210 is disposed in the hollow portion 260 so as to extend spirally in the axial direction.
  • the length of the inner coil 210 in the axial direction is longer than the length of the rotor core 250 in the axial direction.
  • the inner coil 210 is disposed with respect to the rotor core 250 such that both the upper and lower ends of the inner coil 210 in the axial direction project from the rotor core 250. More particularly, the inner coil 210 is preferably disposed at a position at which the middle portion of the inner coil 210 and the middle portion of the rotor core 250 generally coincide with each other in the axial direction.
  • the outer coil 220 is formed to have a spiral shape, and disposed on the outer peripheral side of the rotor core 250.
  • the outer coil 220 is disposed around the outer periphery of the rotor core 250 so as to extend spirally in the axial direction.
  • the induction heater applies an alternating current to the inner coil 210 and the outer coil 220 to generate magnetic force lines around the inner coil 210 and the outer coil 220.
  • the magnetic flux shielding jigs 270 are formed to have a cylindrical shape, and include a hollow portion 280 formed to extend in the axial direction.
  • the magnetic flux shielding jigs 270 are made of copper.
  • the cross-sectional shape of the magnetic flux shielding jigs 270 as viewed in the axial direction is generally the same as the cross-sectional shape of the rotor core 250.
  • the magnetic flux shielding jigs 270 are disposed above and below the rotor core 250 in the axial direction when the rotor core 250 is heated by the rotor core heating device 200.
  • the magnetic flux shielding jigs 270 are disposed with a gap provided between the rotor core 250 and each of the magnetic flux shielding jigs 270 so as not to contact the rotor core 250.
  • the outer shape of the magnetic flux shielding jigs 270 is generally the same as the outer shape of the rotor core 250, the outside diameter of the magnetic flux shielding jigs 270 may be larger than the outside diameter of the rotor core 250.
  • FIG. 5 The function of the rotor core heating device 200 will be described with reference to FIG. 5.
  • the function of the rotor core heating device 200 is schematically illustrated as viewed in the cross-section.
  • the rotor core 250 disposed in the vicinity is affected by the magnetic force lines so that an eddy current flows in the rotor core 250.
  • a current flows in the rotor core 250 Joule heat is generated because of the electrical resistance of the rotor core 250 so that the rotor core 250 is self-heated.
  • the magnetic flux shielding jigs 270 are disposed above and below the rotor core 250 in the axial direction, and therefore concentration of magnetic flux on the upper end surface and the lower end surface of the rotor core 250 in the axial direction is prevented.
  • Magnetic flux is distributed as if the length of the rotor core 250 in the axial direction were generally the same as the sum of the respective lengths, in the axial direction, of the magnetic flux shielding jig 270 disposed on the upper side and the magnetic flux shielding jig 270 disposed on the lower side.
  • magnetic flux does not concentrate on the upper end surface or the lower end surface of the rotor core 250 in the axial direction (location B in FIG. 5), which prevents a curl of a steel plate from occurring because of abnormal heat generation.
  • the magnetic flux shielding jigs 270 are disposed above and below the rotor core 250 in the axial direction, and thus the rotor core 250 generates a magnetic field that is uniform in the axial direction. Consequently, the rotor core 250 is heated uniformly in the axial direction so that the inside diameter of the rotor core 250 is increased uniformly.
  • differences in length of the rotor core 250 in the axial direction can be accommodated. That is, differences in length of the rotor core 250 in the axial direction can be accommodated by disposing the magnetic flux shielding jigs 270 above and below the rotor core 250 if the rotor core 250 has a length, in the axial direction, that is shorter than the length of the inner coil 210 in the axial direction, for each set of the inner coil 210 and the outer coil 220.
  • the rotor core heating device 200 in which the magnetic flux shielding jigs 270 are disposed above and below the rotor core 250 in the axial direction, in addition, a magnetic field that is uniform in the axial direction of the rotor core 250 is generated in contrast to the rotor core heating device 100 according to the first embodiment. Consequently, the rotor core 250 can be heated uniformly in the axial direction so that the inside diameter of the rotor core 250 can be increased uniformly.
  • the magnetic flux shielding jigs 270 are made of cupper.
  • the present invention is not limited thereto.
  • the magnetic flux shielding jigs are made of any magnetic material such as iron, the same function and effect as those of the second embodiment can be obtained.
  • the rotor core shrink-fitting method according to the embodiment includes: heating the rotor core 150 or the rotor core 250 with the rotor core heating device 100 or the rotor core heating device 200 to increase the inside diameter of the rotor core 150 or the rotor core 250; and shrink-fitting the rotor core 150 or the rotor core 250, the inside diameter of which has been increased, onto a shaft to fasten the rotor core 150 or the rotor core 250 to the shaft.
  • the rotor core heating device 100 has room for improvement of the working efficiency in reliably heating the inside of the rotor core 150 and shortening the heating time.
  • FIG. 6A is a perspective view schematically illustrating the configuration of the magnetic flux shielding jig 350.
  • FIG. 6B is a perspective view schematically illustrating the configuration of the rotor core 50. In the following, description is made with reference to the axial direction and the circumferential direction indicated in FIG. 6A and FIG. 6B.
  • the rotor core 50 is a rotor core according to the third embodiment of the present invention.
  • the rotor core 50 is to be heated by a rotor core heating device 300 to be discussed later.
  • the rotor core 50 is a component of a motor (not illustrated).
  • the motor is constituted by a shaft (not illustrated), the rotor core 50 externally fitted on the shaft, and a stator (not illustrated).
  • the shaft is rotatably supported in a sealed case (not illustrated) and has a rotor formed integrally at one end portion.
  • the stator is fixed to the sealed case side to face the outer peripheral surface of the rotor with a predetermined gap therebetween.
  • a shrink-fitting method is known as a method of externally fitting the rotor core 50.
  • the rotor core 50 is heated by the rotor core heating device 300, and the heated rotor core 50 is cooled after being fitted onto the shaft.
  • the rotor core 50 is constituted by stacking a plurality of steel plates, and formed to have a hollow cylindrical shape.
  • the rotor core 50 has a hollow portion 60 formed to penetrate in the axial direction.
  • the hollow portion 60 is a hole into which a shaft is inserted when the rotor core 50 is assembled into the motor.
  • the hollow portion 60 is formed in the center portion of the rotor core 50 to have a circular shape as viewed in a plan.
  • the magnetic flux shielding jig 350 is formed to have a hollow cylindrical shape, and disposed above the rotor core 50 in the axial direction when the rotor core 50 is heated by the rotor core heating device 300.
  • the magnetic flux shielding jig 350 is constituted to have a generally cylindrical shape.
  • the magnetic flux shielding jig 350 has a hollow portion 360 that penetrate in the axial direction, and a plurality of through holes 370 that serve as a through portion.
  • the hollow portion 360 is formed in the center portion of the magnetic flux shielding jig 350 to have a circular shape as viewed in the plan.
  • the hollow portion 360 is formed to have generally the same diameter as the hollow portion 60 of the rotor core 50, and formed generally at the same position as the hollow portion 60 of the rotor core 50 as viewed in the plan when the magnetic flux shielding jig 350 is disposed above the rotor core 50 in the axial direction and generally coaxially with the rotor core 50.
  • the plurality of through holes 370 are disposed at equal intervals in the circumferential direction generally at the edge portion of the magnetic flux shielding jig 350 on the outer peripheral side as viewed in the plan.
  • FIG. 7 The configuration of a rotor core heating device 300 will be described with reference to FIG. 7.
  • FIG. 7 the configuration of the rotor core heating device 300 is schematically illustrated as viewed in the cross-section. In the following, description is made with reference to the axial direction indicated in FIG. 7.
  • the rotor core heating device 300 is a rotor core heating device according to an embodiment of the present invention.
  • the rotor core heating device 300 is a device that heats a rotor core 50 through induction heating to shrink-fit the rotor core 50 onto a shaft (not illustrated).
  • the rotor core heating device 300 includes an inner coil 310, an outer coil 320, an induction heater (not illustrated), and the magnetic flux shielding jig 350 discussed above.
  • the inner coil 310 is formed to have a spiral shape, and disposed on the inner peripheral side of the rotor core 50 (in the hollow portion 60).
  • the inner coil 310 is disposed in the hollow portion 60 so as to extend spirally in the axial direction.
  • the outer coil 320 is formed to have a spiral shape, and disposed on the outer peripheral side of the rotor core 50.
  • the outer coil 320 is disposed around the outer periphery of the rotor core 50 so as to extend spirally in the axial direction.
  • the induction heater applies an alternating current to the inner coil 310 and the outer coil 320 to generate magnetic force lines around the inner coil 310 and the outer coil 320.
  • the magnetic flux shielding jig 350 is disposed above the rotor core 50 in the axial direction when the rotor core 50 is heated by the rotor core heating device 300.
  • the magnetic flux shielding jig 350 is disposed with a gap provided between the rotor core 50 and the magnetic flux shielding jig 350 so as not to contact the rotor core 50.
  • the sum of the length of the magnetic flux shielding jig 350 in the axial direction and the length of the rotor core 50 in the axial direction is generally the same as the length of the inner coil 310 and the outer coil 320 in the axial direction.
  • the magnetic flux shielding jig 350 is disposed above the rotor core 50 in the axial direction.
  • the present invention is not limited thereto.
  • the magnetic flux shielding jig 350 may be disposed below the rotor core 50 in the axial direction.
  • FIG. 8 The function of the rotor core heating device 300 will be described with reference to FIG. 8.
  • the function of the rotor core heating device 300 is schematically illustrated as viewed in the cross-section.
  • magnetic flux lines are indicated by dash-double-dot lines.
  • the plurality of through holes 370 are formed in the magnetic flux shielding jig 350 as viewed in the plan. Therefore, magnetic flux is not blocked by the magnetic flux shielding jig 350, but passes through the through holes 370 of the magnetic flux shielding jig 350. Therefore, the inside of the rotor core 50 is sufficiently heated.
  • the inside of the rotor core 50 can be reliably heated. That is, the inside of the rotor core 50 is sufficiently heated by forming the through holes 370 in the magnetic flux shielding jig 350 and allowing magnetic flux to pass through the through holes 370.
  • FIG. 9A is a perspective view schematically illustrating the configuration of the magnetic flux shielding jig 450.
  • FIG. 9B is a perspective view schematically illustrating the configuration of the rotor core 50.
  • the rotor core 50 has the configuration discussed above, and will not be described in detail.
  • the magnetic flux shielding jig 450 is constituted by an inner peripheral portion 451 and an outer peripheral portion 452.
  • the inner peripheral portion 451 is formed to have a hollow cylindrical shape.
  • the outer peripheral portion 452 is also formed to have a hollow cylindrical shape.
  • the inner peripheral portion 451 is disposed inside the outer peripheral portion 452.
  • the inner peripheral portion 451 and the outer peripheral portion 452 are disposed with a predetermined gap D, which serves as a through portion, provided therebetween.
  • a rotor core heating device having the magnetic flux shielding jig 450 configured in this way achieves the same function and effect as those of the rotor core heating device 300.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
  • General Induction Heating (AREA)
  • Manufacture Of Motors, Generators (AREA)

Abstract

Un dispositif de chauffage de couronne rotor (100) est configuré pour chauffer une surface latérale périphérique interne et une surface latérale périphérique externe d'une couronne rotor (150) par chauffage par induction. La couronne rotor présente une forme cylindrique creuse. Le dispositif de chauffage de couronne rotor comprend une première bobine (110), une seconde bobine (120), et un montage de blindage contre le flux magnétique (170). La première bobine est disposée à l'intérieur de la couronne rotor, et est configurée pour chauffer la surface latérale périphérique interne de la couronne rotor par chauffage par induction. La seconde bobine est disposée à l'extérieur de la couronne rotor, et est configurée pour chauffer la surface latérale périphérique externe de la couronne rotor par chauffage par induction. Le montage de blindage contre le flux magnétique présente une forme cylindrique creuse, et est disposé à l'opposé d'une première surface d'extrémité de la couronne rotor, avec un entrefer disposé entre la première surface d'extrémité et le montage de blindage contre le flux magnétique dans une direction axiale de la couronne rotor.
PCT/IB2014/002016 2013-09-17 2014-09-15 Dispositif de chauffage de couronne rotor, et procédé d'ajustage serré de couronne rotor WO2015040482A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201480051084.XA CN105556810B (zh) 2013-09-17 2014-09-15 转子芯加热装置和转子芯热配合方法
US15/022,684 US20160233750A1 (en) 2013-09-17 2014-09-15 Rotor core heating device and rotor core shrink-fitting method

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP2013-192212 2013-09-17
JP2013192212 2013-09-17
JP2014004421A JP5874747B2 (ja) 2013-09-17 2014-01-14 ロータコア加熱装置及びロータコア焼き嵌め方法
JP2014-004421 2014-01-14
JP2014019763A JP5888351B2 (ja) 2014-02-04 2014-02-04 ロータコア加熱装置
JP2014-019763 2014-02-04

Publications (2)

Publication Number Publication Date
WO2015040482A2 true WO2015040482A2 (fr) 2015-03-26
WO2015040482A3 WO2015040482A3 (fr) 2015-07-30

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PCT/IB2014/002016 WO2015040482A2 (fr) 2013-09-17 2014-09-15 Dispositif de chauffage de couronne rotor, et procédé d'ajustage serré de couronne rotor

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US11095195B2 (en) 2016-09-08 2021-08-17 Protean Electric Limited Method and arrangement for assembling an electric motor or generator

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