WO2023228270A1 - Machine électrique tournante - Google Patents

Machine électrique tournante Download PDF

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Publication number
WO2023228270A1
WO2023228270A1 PCT/JP2022/021233 JP2022021233W WO2023228270A1 WO 2023228270 A1 WO2023228270 A1 WO 2023228270A1 JP 2022021233 W JP2022021233 W JP 2022021233W WO 2023228270 A1 WO2023228270 A1 WO 2023228270A1
Authority
WO
WIPO (PCT)
Prior art keywords
bracket
brush
rotating shaft
motor
shaft
Prior art date
Application number
PCT/JP2022/021233
Other languages
English (en)
Japanese (ja)
Inventor
祐太朗 北川
Original Assignee
三菱電機株式会社
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
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to JP2022558418A priority Critical patent/JP7286032B1/ja
Priority to PCT/JP2022/021233 priority patent/WO2023228270A1/fr
Priority to JP2023057797A priority patent/JP7297176B1/ja
Publication of WO2023228270A1 publication Critical patent/WO2023228270A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/067—Fixing them in a housing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/08—Rigid support of bearing units; Housings, e.g. caps, covers for spindles
    • F16C35/12—Rigid support of bearing units; Housings, e.g. caps, covers for spindles with ball or roller bearings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K13/00—Structural associations of current collectors with motors or generators, e.g. brush mounting plates or connections to windings; Disposition of current collectors in motors or generators; Arrangements for improving commutation
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/14—Means for supporting or protecting brushes or brush holders
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings

Definitions

  • This application relates to a rotating electrical machine.
  • Patent Document 1 since the shaft grounding brush is made to slide on a member having the same potential as the rotating shaft, there is a problem in that abrasion powder of the brush is scattered around. This abrasion powder may cause rotation failure due to adhesion to rotating parts, or may cause short circuits or deterioration of insulation performance due to adhesion to surrounding electronic boards.
  • the present application has been made in view of the above, and an object thereof is to obtain a rotating electrical machine having a shaft grounding device that suppresses electrolytic corrosion of the rotating electrical machine and reduces scattering of wear powder.
  • the rotating electric machine includes a rotating shaft rotatably supported by a bracket via a bearing, and a brush that is supported by a support part provided on the rotating shaft and contacts the bracket on the outer peripheral side of the bearing.
  • the rotating shaft and the bracket are electrically connected to each other via the support portion and the brush.
  • the rotating shaft and the bracket are configured to be electrically connected to each other on the outer peripheral side of the bearing via the support portion and the brush, electrolytic corrosion of the bearing can be suppressed and scattering of wear powder can be suppressed. It has the effect of reducing
  • FIG. 1 is a diagram showing a cross section of a rotating electrical machine and a configuration of its peripheral circuits according to a first embodiment
  • FIG. FIG. 2 is a cross-sectional view showing an axial cross section of related parts of the rotating electric machine according to the first embodiment.
  • FIG. 3 is an equivalent circuit diagram showing the principle of shaft voltage generation of the rotating electric machine according to the first embodiment.
  • FIG. 3 is a cross-sectional view showing a comparative example of the rotating electric machine according to the first embodiment.
  • FIG. 7 is a diagram of related parts of the rotating electrical machine according to Embodiment 2, viewed from the load connection side.
  • FIG. 7 is a diagram of related parts of the rotating electrical machine according to Embodiment 3, viewed from the load connection side.
  • FIG. 7 is a diagram of related parts of the rotating electrical machine according to Embodiment 4, viewed from the load connection side.
  • FIG. 7 is a cross-sectional view showing an axial cross section of related parts of a rotating electric machine according to a fifth embodiment.
  • FIG. 7 is a cross-sectional view showing an axial cross section of related parts of a rotating electrical machine according to a sixth embodiment.
  • FIG. 1 is a diagram showing a peripheral circuit that drives a motor 100 and a cross-sectional configuration of the motor 100 in the rotation axis direction.
  • the peripheral circuit includes a power supply section 1 , a power conversion circuit section 3 , a wiring 2 connecting them, and a wiring 4 connecting the power conversion circuit section 3 and the motor 100 .
  • the power supply unit 1 is a DC power supply that supplies the power necessary to drive the motor 100.
  • the DC power source for example, a lithium ion battery, a nickel hydride battery, or a lead acid battery can be used.
  • the power conversion circuit section 3 includes a semiconductor switching element and a circuit that drives the semiconductor switching element.
  • a semiconductor switching element For example, an IGBT (Insulated Gate Bipolar Transistor), a MOSFET (Metal Oxide Semiconductor Field Effect Transistor), or the like can be used as the switching element.
  • the power conversion circuit section 3 boosts or steps down the DC voltage supplied from the power supply section 1 via the wiring 2 to a DC voltage of another voltage.
  • the three-phase alternating current required for driving the motor 100 is generated from the stepped-up or stepped-down direct current voltage by adjusting the ratio of on time and off time of a semiconductor switching element different from the semiconductor switching element. This three-phase alternating current is supplied to the motor 100 via the wiring 4.
  • the power inverter circuit section 3 functions as a so-called converter circuit and/or an inverter circuit. Further, in order to prevent high frequency noise generated by the switching operation of the semiconductor switching element from leaking to the power supply section 1 side, the power conversion circuit section 3 is provided with a noise filter consisting of an inductor and a capacitor as necessary.
  • the power supply section 1 does not need to be a DC power source, and may use an AC power source. In this case, the power inverter circuit section 3 may be replaced with a rectifier circuit that inputs an AC voltage and converts it into a DC voltage of a different voltage.
  • the rotor 10 has a rotor core 11 and a rotating shaft 12. Although not shown, a plurality of permanent magnets are embedded inside the rotor core 11.
  • the rotor core 11 is obtained, for example, by laminating thin plates of electromagnetic steel sheets in the direction of the rotation axis and integrally forming them.
  • a hole for inserting a rotating shaft 12 is formed in the center of the rotor core 11, and the rotating shaft 12 is fixed so as to be coaxial with the hole.
  • the rotor core 11 and the rotating shaft 12 are electrically connected.
  • the rotating shaft 12 is held by a pair of bearings 20 on each of its load connection side and load non-connection side, and the rotating shaft 12 is rotatable with respect to the housing 40 .
  • a pair of bearings 20 correspond to a first bearing and a second bearing.
  • the bearing 20 has an inner ring 21, a plurality of rigid balls 22, and an outer ring 23.
  • the outer ring 23 is fixed to the housing 40, and the inner ring 21 is fixed to the rotating shaft 12.
  • the first bearing on the load connection side will be described as bearing 20 as a representative.
  • the stator 30 is composed of a stator core 31 and a stator winding 32.
  • the stator core 31 is obtained, for example, by laminating thin electromagnetic steel sheets in the direction of the rotation axis and integrating them.
  • the stator winding 32 is. It is wound around the teeth of the stator core 31 and housed in the slot. A portion of the stator winding 32 that protrudes from the outermost layer of the stator core 31 in the rotation axis direction is referred to as a coil end portion.
  • a winding method called Regardless of the winding method, the effects of the embodiments described later can be similarly obtained.
  • the casing 40 is composed of a housing 41 and brackets 42 and 43. Brackets 42 and 43 correspond to first bracket 42 and second bracket 43.
  • the housing 41 has a cylindrical shape, and its inner circumferential surface faces the outer circumferential surface of the stator core 31, and they are integrally fixed to each other.
  • the housing 41 and the stator core 31 are electrically connected.
  • Brackets 42 and 43 are fastened with bolts or the like to the openings at both ends of the housing 41, that is, the load connection side and the load non-connection side, respectively. Further, the outer ring 23 of the bearing 20 is fixed to the brackets 42 and 43.
  • the housing 41 and the brackets 42 and 43 which are integrated together, serve as the casing 40 of the motor 100 and house the rotor 10, the bearing 20, and the stator 30 therein.
  • the casing 40 may be grounded to a common conductor with the power inverter circuit section 3.
  • FIG. 2 is a diagram showing the vicinity of the first bearing 20 and first bracket 42 on the load connection side of the motor 100. Since the following explanation applies similarly to the second bearing and second bracket 43 on the opposite load connection side, only the first bearing 20 and first bracket 42 on the load connection side will be discussed. In the description, the first bearing 20 will be abbreviated as bearing 20 and the first bracket 42 will be abbreviated as bracket 42. Further, the following explanation will be based on the reference numerals used in FIGS. 1 and 2, and the same reference numerals will be used for common parts, and detailed explanation will be omitted. Parts that differ from one figure to another will be described using new symbols.
  • the shaft grounding device 50 includes a support portion 51 and a brush 52.
  • the support portion 51 is made of a conductive member and is fixed to the rotating shaft 12 so as to rotate at the same time as the rotating shaft 12. Further, the support portion 51 and the rotating shaft 12 are electrically connected to each other.
  • the brush 52 is made of a conductive member and is fixed to the support portion 51 so as to be electrically conductive. Further, the support portion 51 is attached to the rotating shaft 12 so that the brush 52 and the bracket 42 are in electrical contact with each other.
  • a carbon brush, a plate spring, or a bundle of conductive fibers can be considered. In this manner, the brush 52 rotates in synchronization with the rotating shaft 12 via the support portion 51 and has the function of energizing the rotating shaft 12 and the housing 40 while sliding on the bracket 42 .
  • FIG. 3 is an equivalent circuit diagram showing the principle of generating shaft voltage in the motor 100.
  • the shaft voltage is defined as the potential of the rotating shaft 12 measured with the potential of the casing 40 as a reference.
  • point G represents the potential of the housing 40
  • point N represents the potential of the neutral point N of the stator winding 32
  • point S represents the potential of the rotating shaft 12.
  • the voltage V1 that is the potential difference between the N point and the G point represents the voltage at the neutral point N of the motor 100
  • the potential difference between the S point and the G point is represented as the shaft voltage V2 of the motor 100
  • C1 represents the stray capacitance between the stator winding 32 and the rotor 10
  • C2 represents the stray capacitance between the rotor 10 and the casing 40.
  • a group of semiconductor switching elements included in the power conversion circuit section 3 performs a switching operation at a carrier frequency fc based on PWM control.
  • the magnitude of the voltage V1 at the neutral point N also changes over time in a stepwise manner with the period of the carrier frequency fc.
  • the fluctuation of the voltage V1 at the neutral point N generated between the housing 40 and the stator winding 32 is divided by the stray capacitance C1 and the stray capacitance C2 distributed inside the motor 100, so that the rotation shaft 12, a finite potential difference, that is, an axial voltage, is induced with respect to the housing 40.
  • the impedance Z of the stray capacitance C at the frequency f can be expressed as shown in the following equation (1).
  • the shaft grounding device 50 includes a support portion 51 and a brush 52 that are electrically connected.
  • the support portion 51 is electrically connected to the rotating shaft 12 and the brush 52 is electrically connected to the bracket 42, the rotating shaft 12 and the casing 40 are electrically connected via the shaft grounding device. .
  • the shaft voltage V2 divided across the rotating shaft 12 can be reduced.
  • the combined resistance of the support portion 51 and the brush 52 corresponds to the resistance Rg connected by the broken line in FIG.
  • FIG. 4 is a diagram showing a motor 200 of a comparative example.
  • the motor 200 of the comparative example includes a bracket 201, a rotating shaft 202, a bearing 203, and a shaft grounding device 210. It is characterized by consisting of a brush 211 that slides on and energizes.
  • electrical continuity is established between the rotating shaft 202 and the bracket 201 via a shaft grounding device 210 for the purpose of reducing shaft voltage.
  • the shaft grounding device 50 included in the motor 100 according to the first embodiment is characterized by comprising a support portion 51 fixed to the rotating shaft 12 and a brush 52 that slides on the bracket 42 to supply electricity.
  • This configuration allows the contact portion of the brush 52 to be separated from the bearing 20. This makes it possible to prevent the abrasion powder generated by the sliding of the brush 52 from adhering to the bearing 20, the rotating shaft 12, and devices connected thereto.
  • the shaft grounding device 50 includes the support portion 51 fixed to the rotating shaft 12 and the brush 52 that slides on the bracket 42 and supplies electricity, It is possible to obtain a motor 100 that can reduce the shaft voltage and avoid adhesion of abrasion powder generated by sliding to the rotating parts.
  • FIG. 5 is a diagram of the motor 300 according to the second embodiment viewed from the load connection side of the rotating shaft.
  • the shaft grounding device 60 is composed of both a disk-shaped support portion 61 facing the bracket 42 and a brush 62.
  • the support portion 61 is made of an electrically conductive material, and is electrically connected to the rotation shaft 12 by being fixed to the rotation shaft 12 .
  • the brush 62 is made of a conductive member arranged concentrically with the support portion 61 and comes into contact with the bracket 42 .
  • the shaft grounding device 60 of the motor 300 can reduce the shaft voltage V2 by electrically connecting the rotating shaft 12 and the bracket 42.
  • a plurality of brushes 62 may be arranged concentrically, allowing a high degree of freedom in designing contact points. Furthermore, since the contact area with the bracket 42 can be increased, the effect of reducing the resistance Rg for grounding can be obtained. As explained above, according to the second embodiment, since the support portion 61 has a disk shape, the degree of freedom in arranging the brush 62 is increased, which is more advantageous than the first embodiment from the viewpoint of reducing the axial voltage. It becomes the composition.
  • FIG. 6 is a diagram of a motor 400 according to Embodiment 3 viewed from the load connection side of the rotating shaft.
  • the shaft grounding device 70 includes both a support portion 71 having a plurality of blade shapes facing the bracket 42, and a brush 72.
  • the support portion 71 is made of an electrically conductive material, and is electrically connected to the rotating shaft 12 by being fixed to the rotating shaft 12 .
  • the brush 72 is made of a conductive member disposed on the support portion 71 and comes into contact with the bracket 42 .
  • the shaft grounding device 70 of the motor 400 can reduce the shaft voltage V2 by electrically connecting the rotating shaft 12 and the bracket 42.
  • the support portion 71 is provided with a plurality of blades 73 and is fixed to the rotating shaft 12 and rotates at the same time, so that the bracket 42 can be air-cooled.
  • the motor cooling effect can be obtained while obtaining the shaft voltage effect.
  • the bracket 42 can be air-cooled because the support portion 71 has a plurality of blade shapes, and the configuration is more advantageous than the first embodiment from the viewpoint of motor cooling. becomes.
  • FIG. 7 is a diagram of a motor 500 according to Embodiment 4 viewed from the load connection side of the rotating shaft.
  • the shaft grounding device 80 includes both a rod-shaped support portion 81 facing the bracket 42 and a brush 82.
  • the support portion 81 is made of a conductive material, and is electrically connected to the rotating shaft 12 by being fixed to the rotating shaft 12 .
  • the brush 82 is made of a conductive member disposed on the support portion 81 and comes into contact with the bracket 42 .
  • the shaft grounding device 80 of the motor 500 can reduce the shaft voltage V2 by electrically connecting the rotating shaft 12 and the bracket 42.
  • the support portion 81 is shaped like a rod, it is possible to reduce the weight and the amount of materials required for manufacturing. As a result, it is possible to provide a lightweight and inexpensive shaft grounding device while obtaining the shaft voltage effect.
  • a plurality of brushes 82 may be arranged along the rod shape, in which case it becomes possible to reduce the axial voltage more effectively.
  • the support portion 81 since the support portion 81 has a rod shape, it is possible to provide a lightweight shaft grounding device 80, and from the viewpoint of weight and cost compared to the first embodiment. This is an advantageous configuration.
  • FIG. 8 is a sectional view showing a configuration of related parts of a motor 600 according to the fifth embodiment, taken in the direction of the rotation axis.
  • the bracket 45 of the motor 600 includes a groove 46 that stores the brush 52 and an opening 47 that communicates with the groove 46 .
  • the brush 52 of the shaft grounding device 50 of the motor 600 comes into contact with the bottom surface of the groove 46 to establish electrical continuity between the rotating shaft 12 and the bracket 45 .
  • the shaft grounding device 50 of the motor 600 can reduce the shaft voltage V2 by electrically connecting the rotating shaft 12 and the bracket 45.
  • the fifth embodiment it becomes possible to collect abrasion powder generated by sliding between the brush 52 and the bracket 45 in the groove portion 46. Further, the abrasion powder collected in the groove 46 can be discharged to the outside through the opening 47 communicating with the groove 46. Alternatively, during operation of the motor 600, the opening 47 may be covered to trap wear powder, and the collected wear powder may be collected by suction or the like during periodic inspections.
  • FIG. 8 only the first bracket on the load connection side is illustrated and explained, but the above configuration can be similarly applied to the second bracket on the non-load connection side. Alternatively, it may be applied only to either the first or second bracket.
  • the bracket 45 includes the groove 46 in which the brush 52 is stored and the opening 47 that communicates with the groove 46, thereby collecting wear particles generated by sliding. It can also be discharged to the outside. Thereby, scattering of wear powder can be suppressed more effectively than in the first embodiment while reducing the shaft voltage.
  • FIG. 9 is a sectional view showing a configuration of related parts of a motor 700 according to the sixth embodiment, taken in the direction of the rotation axis.
  • the shaft grounding device 90 includes a support portion 91 and a brush 92, and the support portion 91 includes a first protrusion 93a and a second protrusion 93b.
  • the first protrusion 93a is arranged closer to the rotation axis than the brush 92 on the inner circumference side
  • the second protrusion 93b is arranged on the outer circumference side farther from the rotation axis than the brush 92.
  • the first protrusion 93a and the second protrusion 93b both protrude in the direction of the bracket 48. That is, the brush 92 is arranged so as to be housed in a space between the first convex portion 93a and the second convex portion 93b.
  • the bracket 48 includes a first wall portion 49a and a second wall portion 49b.
  • the first wall portion 49a is arranged on the inner circumferential side closer to the rotation axis than the first convex portion 93a
  • the second wall portion 49b is arranged on the outer circumference side farther from the rotation axis than the second convex portion 93b.
  • Both the first wall portion 49a and the second wall portion 49b have a shape that protrudes in the direction of the support portion 91. That is, the brush 92, the first convex portion 93a, and the second convex portion 93b are placed in the space formed by the first wall portion 49a and the second wall portion 49b corresponding to the inner circumferential side and the outer circumferential side, respectively. Stored.
  • the brush 92 of the shaft grounding device 90 of the motor 700 makes electrical continuity between the rotating shaft 12 and the bracket 45 by contacting the bracket 48 . Thereby, the shaft grounding device 90 of the motor 700 can reduce the shaft voltage V2 by electrically connecting the rotating shaft 12 and the bracket 48.
  • abrasion powder generated by sliding between the brush 92 and the bracket 48 is transferred to the first convex portion 93a and the second convex portion 93b, as well as the first wall portion 49a and the second wall portion 49b. It becomes possible to collect it in the space formed by This makes it possible to prevent the generated abrasion powder from scattering to the outside.
  • the motor 700 can also be configured to collect the collected wear powder by providing a groove and an opening communicating with the groove as described in the fifth embodiment.
  • the support portion 91 includes the first convex portion 93a and the second convex portion 93b
  • the bracket 48 includes the first wall portion 49a and the second wall portion

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Motor Or Generator Frames (AREA)
  • Mounting Of Bearings Or Others (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

La présente invention comprend un arbre rotatif (12) soutenu par un support (42) par l'intermédiaire d'un palier (20) de manière à pouvoir tourner librement et un balai (52) qui est soutenu par une section de support (51) fournie à l'arbre rotatif et mise en contact avec le support sur le côté circonférentiel externe du palier. L'arbre rotatif et le support conduisent l'électricité par l'intermédiaire de la section de support et du balai. L'arbre rotatif et le support étant configurés de manière à conduire l'électricité sur la circonférence externe du palier par l'intermédiaire de la section de support et du balai, il est possible de supprimer la corrosion électrique du palier et de réduire la dispersion des débris d'usure.
PCT/JP2022/021233 2022-05-24 2022-05-24 Machine électrique tournante WO2023228270A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2022558418A JP7286032B1 (ja) 2022-05-24 2022-05-24 回転電機
PCT/JP2022/021233 WO2023228270A1 (fr) 2022-05-24 2022-05-24 Machine électrique tournante
JP2023057797A JP7297176B1 (ja) 2022-05-24 2023-03-31 回転電機

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2022/021233 WO2023228270A1 (fr) 2022-05-24 2022-05-24 Machine électrique tournante

Publications (1)

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WO2023228270A1 true WO2023228270A1 (fr) 2023-11-30

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PCT/JP2022/021233 WO2023228270A1 (fr) 2022-05-24 2022-05-24 Machine électrique tournante

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5661356A (en) * 1993-10-22 1997-08-26 Fisher; Rodney R. Motor shaft discharge device
JP2016119760A (ja) * 2014-12-19 2016-06-30 三菱自動車工業株式会社 回転電機

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5837751B2 (ja) 2011-02-03 2015-12-24 昭和電線ケーブルシステム株式会社 テープ状酸化物超電導線材の製造方法及び熱処理装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5661356A (en) * 1993-10-22 1997-08-26 Fisher; Rodney R. Motor shaft discharge device
JP2016119760A (ja) * 2014-12-19 2016-06-30 三菱自動車工業株式会社 回転電機

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JP2023172894A (ja) 2023-12-06
JPWO2023228270A1 (fr) 2023-11-30
JP7286032B1 (ja) 2023-06-02
JP7297176B1 (ja) 2023-06-23

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