WO2015052962A1 - Machine électrique rotative - Google Patents

Machine électrique rotative Download PDF

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Publication number
WO2015052962A1
WO2015052962A1 PCT/JP2014/066455 JP2014066455W WO2015052962A1 WO 2015052962 A1 WO2015052962 A1 WO 2015052962A1 JP 2014066455 W JP2014066455 W JP 2014066455W WO 2015052962 A1 WO2015052962 A1 WO 2015052962A1
Authority
WO
WIPO (PCT)
Prior art keywords
resolver
rotor
rotating electrical
resolver rotor
end bracket
Prior art date
Application number
PCT/JP2014/066455
Other languages
English (en)
Japanese (ja)
Inventor
菊地　聡
三好　努
明仁 中原
Original Assignee
株式会社日立産機システム
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 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
Publication of WO2015052962A1 publication Critical patent/WO2015052962A1/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
    • G01D5/204—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the mutual induction between two or more coils
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H02K11/21—Devices for sensing speed or position, or actuated thereby

Definitions

  • the present invention relates to a rotating electrical machine.
  • a resolver is an example of a rotation sensor that detects the rotational position of a rotating shaft in a rotating electrical machine such as an electric motor or a generator.
  • Patent Document 1 discloses that a fixing member that is disposed adjacent to the axial direction side of the stator is caulked and fixed to the cylindrical housing, thereby fixing the stator to the cylindrical housing.
  • a featured stator fixing method is disclosed.
  • the resolver rotor has a thin plate shape in which a hole larger than the outer diameter of the rotation shaft is formed, and is fixed to the rotation shaft with resin in a state where the rotation shaft is inserted into the hole.
  • a resolver rotor fixing structure is disclosed.
  • Patent Document 1 and Patent Document 2 since the resolver rotor is directly fixed to the shaft, magnetic flux leaking from the main motor flows into the resolver via the shaft, and the resolver erroneously detects the signal, thereby controlling the rotating electrical machine. Stability and thus reliability may be reduced.
  • An object of this invention is to improve the reliability of the rotary electric machine provided with the resolver.
  • a rotating electric machine comprising: a motor stator; a motor rotor formed radially inside the motor stator; a shaft formed radially inside the motor rotor; and a resolver that detects a rotational position of the motor rotor.
  • a rotating electrical machine including a resolver rotor adapter and a resolver rotor, wherein the rotating electrical machine includes a member including a nonmagnetic material, and the resolver rotor and the shaft are magnetically separated by the member including the nonmagnetic material.
  • FIG. 1 is a perspective view of a rotating electrical machine according to an embodiment of the present invention.
  • FIG. 2 is an exploded perspective view of the rotating electrical machine according to the embodiment of the present invention.
  • FIG. 3 is a cross-sectional view taken along a plane passing through the rotating shaft of the rotating electrical machine according to the embodiment of the present invention.
  • FIG. 4 is a perspective view around the resolver according to the embodiment of the present invention.
  • the direction in which the shaft 300 extends is defined as the axial direction
  • the direction perpendicular to the axial direction is defined as the radial direction
  • the rotational direction of the motor rotor 200 is defined as the circumferential direction.
  • the rotating electrical machine 2000 includes a motor stator 100, a motor rotor 200, a shaft 300, a resolver 400, a bearing 500, an end bracket 600, a pump mounting seat 700, an outer housing 800, and an inner housing 900.
  • the rotating electrical machine 2000 in this embodiment can be applied to a hybrid system, an electric construction machine, a hybrid vehicle, and the like.
  • the motor stator 100 has a stator core 110 and a stator coil 130.
  • the motor stator 100 is formed on the radially outer side of the motor rotor 200.
  • the motor stator 100 is configured by winding a stator coil 130 around a stator core 110.
  • the stator core 110 is formed by, for example, laminating a plurality of plate-shaped molding members formed by punching plate-shaped magnetic members in the axial direction.
  • the motor rotor 200 has a permanent magnet 210 and a motor rotor core 220.
  • the motor rotor 200 is formed inside the motor stator 100 in the radial direction.
  • the motor rotor 200 is formed on the radially outer side of the shaft 300.
  • the stator coil 120 generates magnetic flux when energized.
  • a magnetic field is generated inside the motor stator 100 by passing a current through the stator coil 130 wound around the stator core 110.
  • the motor rotor 200 rotates about the shaft 300 due to electromagnetic interaction with the magnetic field generated in the motor stator 100.
  • the motor rotor core 220 is fixed to the shaft 300 by shrinking or press fitting.
  • the motor rotor core 220 is provided with a plurality of through holes.
  • a plurality of permanent magnets 210 are embedded in a plurality of through holes, that is, a motor rotor core 220.
  • the permanent magnet 210 has a square shape.
  • a ferrite magnet, a rare earth magnet, a rare earth magnet with a reduced amount of dysprosium, a bonded magnet, or the like can be used.
  • the shaft 300 is formed inside the motor rotor 200 in the radial direction. Shaft 300 transmits torque generated by motor rotor 200 to an external load.
  • the resolver 400 includes a resolver base plate 410, a resolver rotor adapter 420, a resolver stator 430, a resolver rotor 440, and a resolver rotor pressing plate 450.
  • the resolver 400 is formed between the pump mounting seat 700 and the bearing 500 in the axial direction.
  • the resolver 400 detects the rotational position of the motor rotor 200.
  • the resolver base plate 410 is formed between the resolver rotor adapter 420 and the end bracket 600 in the radial direction.
  • the resolver base plate 410 is fixed to the end bracket 600 with bolts.
  • the resolver base plate 410 is a jig for fixing the resolver stator 430 to the end bracket 600.
  • the resolver base plate 410 has a shape that matches the corner 602 of the end bracket.
  • the cross section in the axial direction of the resolver base plate 410 is L-shaped.
  • the resolver base plate 410 is provided with a notch 412 in the circumferential direction.
  • the pump mounting seat 700 is fitted into the notch 412 to suppress the movement of the pump mounting seat 700 in the radial direction.
  • the resolver rotor adapter 420 is formed between the shaft 300 and the resolver base plate 410 in the radial direction.
  • the resolver rotor adapter 420 is a jig for fixing the resolver rotor 440 to the shaft 300.
  • the cross section in the axial direction of the resolver rotor adapter 420 is stepped.
  • the resolver stator 430 is formed on the radially outer side of the resolver rotor 440. As with the motor stator 100, the resolver stator 430 is configured by winding a core around a coil. The axial thickness of the resolver stator 430 is substantially the same as the axial thickness of the resolver rotor 440. The resolver stator 430 is fixed to the resolver base plate 410 by screwing or the like.
  • the resolver rotor 440 is sandwiched between the resolver rotor pressing plate 450 and the resolver rotor adapter 420 in the axial direction.
  • the resolver rotor 440 is fitted to the stepped portion 422 of the resolver rotor adapter.
  • the resolver rotor 440 is formed by laminating a plurality of plate-shaped molded members formed by punching plate-shaped members in the axial direction.
  • the resolver rotor 440 has an annular shape.
  • the resolver rotor 440 is not in direct contact with the shaft 300, and the resolver rotor 440 is located away from the shaft 300. Thereby, the position adjustment of the resolver rotor 440 can be facilitated. Further, the size of the resolver 400 can be freely changed using the resolver rotor adapter 420.
  • the resolver rotor pressing plate 450 is formed between the resolver rotor adapter 420 and the pump mounting seat 700 in the axial direction.
  • the resolver rotor pressing plate 450 fixes the resolver rotor 440 together with the resolver rotor adapter 420 in the axial direction.
  • the resolver rotor pressing plate 450 is fixed to the resolver rotor adapter 420 by screwing or the like.
  • the resolver rotor presser plate 450 has an annular shape.
  • the bearing 500 is formed between the bearing cover 510 and the resolver 400 in the axial direction.
  • the bearing 500 is fixed to the end bracket 600 and the shaft 300.
  • the bearing 500 is also called a bearing, and rotates the motor rotor 200 accurately and smoothly.
  • the bearing cover 510 is formed between the bearing 500 and the motor stator 100 in the axial direction.
  • the bearing cover 510 is fixed to the end bracket 600.
  • the bearing cover 510 has a crank shape in the cross section of the rotating electrical machine 2000. The bearing cover 510 prevents foreign matters from entering the bearing 500.
  • the end bracket 600 is formed between the outer housing 800 and the pump mounting seat 700 in the axial direction.
  • the end bracket 600 covers a cylindrical open end formed by the outer housing 800 and the inner housing 900.
  • the end bracket 600 has a protrusion 602. At the protrusion 602, the end bracket 600 and the outer housing 800 are fixed by bolts.
  • the end bracket 600 has an extending part 604.
  • the extending portion 604 is formed between the bearing 500 and the resolver rotor adapter 420 in the axial direction. The extending portion 604 prevents foreign matter from entering the bearing 500.
  • the end bracket 600 and the inner housing 900 are fixed with bolts.
  • the pump mounting seat 700 is for connecting the rotating electrical machine 2000 and a load.
  • the pump mounting seat 700 protects the resolver 400 by covering the resolver 400.
  • the outer housing 800 is formed on the radially outer side of the inner housing 900.
  • the rotary electric machine 2000 is cooled by passing a coolant such as water through a gap formed by the outer housing 800 and the inner housing 900.
  • the inner housing 900 is formed outside the motor stator 100 in the radial direction.
  • the inner housing 900 is fixed to the motor stator 100 by shrinking or press fitting.
  • the resolver rotor 440 and the shaft 300 are magnetically isolated by a member containing a non-magnetic material.
  • the magnetic flux from the shaft 300 to the resolver rotor 440 is shielded by the member including a nonmagnetic material.
  • the resolver rotor adapter 420 and the resolver base plate 410 are used as the member including the nonmagnetic material, it is difficult to shield the magnetic flux from the shaft 300 to the resolver rotor 440 by the member including the nonmagnetic material.
  • the leakage magnetic flux from the shaft 300 enters the resolver rotor 440 from the resolver rotor adapter 420 and the resolver rotor pressing plate 450 and flows into the end bracket 600 through the resolver base plate 410 through the resolver stator 430.
  • the resolver rotor pressing plate 450 may magnetically bypass the shaft 300 and the resolver rotor 440.
  • the member including the non-magnetic material is a member constituting the resolver 400 or a member around the resolver 400.
  • the resolver rotor adapter 420, the resolver base plate 410, and the resolver rotor pressing plate 450 or the end bracket 600 are made of a nonmagnetic material, preferably a nonmagnetic material.
  • any one or more of the rotor pressing plate 450 or the end bracket 600, the outer housing 800, and the inner housing 900 includes a non-magnetic material, and preferably includes a non-magnetic material.
  • the resolver rotor pressing plate 450 and the end bracket 600 include a non-magnetic material, preferably a non-magnetic material.
  • the member includes a magnetic material, preferably a magnetic material.
  • the member including a non-magnetic material a member in which the resolver rotor adapter 420, the resolver rotor pressing plate 450, and the resolver base plate 410 are integrally formed of resin may be used.
  • the integrally molded member including the nonmagnetic material is fixed to the end bracket 600.
  • Table 1 below shows the analysis results when some or all of the members constituting the resolver 400 or the members around the resolver 400 are made nonmagnetic.
  • Table 1 shows the analysis results when some or all of the members constituting the resolver 400 or the members around the resolver 400 are made nonmagnetic.
  • the resolver magnetic flux density can be reduced in candidates 2 to 6 as compared with candidate 1. From the viewpoint of the resolver magnetic flux density, it is desirable that only the resolver rotor adapter 420, the resolver base plate 410, the resolver rotor pressing plate 450, and the end bracket 600 are made of a nonmagnetic material.
  • the resolver rotor adapter 420, the resolver base plate 410, and the resolver rotor pressing plate 450 are made of a non-magnetic material.
  • the relative magnetic permeability of the nonmagnetic material is 1 or more and 3 or less, preferably 1 or more and 2 or less.
  • a mixed material of the non-magnetic material and the magnetic material may be used.
  • Non-magnetic material includes resin, metal, metal alloy, stainless steel and the like.
  • the resin include ABS resin, reinforced plastic (engineering plastic), bakelite, thermoplastic resin, and thermosetting resin.
  • One or more of these materials may be used for the resin.
  • the metal material include aluminum, brass, brass, zinc, gold, silver, and nickel. These metals may be used alone or in combination of two or more.
  • magnétique materials examples include iron, ferrite, and permalloy. One or more of these materials may be used for the magnetic material.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

Le but de l'invention est d'améliorer la fiabilité d'une machine électrique rotative qui est pourvue d'un résolveur. L'invention porte sur une machine électrique rotative qui est pourvue : d'un stator de moteur ; d'un rotor de moteur qui est formé sur le côté interne du stator de moteur, ledit côté interne étant dans la direction de diamètre du stator de moteur ; d'un arbre qui est formé sur le côté interne du rotor de moteur, ledit côté interne étant dans la direction de diamètre du rotor de moteur ; et d'un résolveur qui détecte un emplacement de rotation du rotor de moteur. Le résolveur est pourvu d'un adaptateur de rotor de résolveur et un rotor de résolveur, la machine électrique rotative possède un élément contenant un matériau non magnétique, et le rotor de résolveur et l'arbre sont séparés magnétiquement l'un de l'autre au moyen de l'élément contenant le matériau non magnétique.
PCT/JP2014/066455 2013-10-11 2014-06-20 Machine électrique rotative WO2015052962A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013-213298 2013-10-11
JP2013213298A JP2015077032A (ja) 2013-10-11 2013-10-11 回転電機

Publications (1)

Publication Number Publication Date
WO2015052962A1 true WO2015052962A1 (fr) 2015-04-16

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ID=52812784

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2014/066455 WO2015052962A1 (fr) 2013-10-11 2014-06-20 Machine électrique rotative

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JP (1) JP2015077032A (fr)
WO (1) WO2015052962A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3089332A1 (fr) * 2015-04-29 2016-11-02 Skf Magnetic Mechatronics Machine rotative
WO2018185874A1 (fr) 2017-04-05 2018-10-11 日産自動車株式会社 Structure de contremesures anticollision pour moteur

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015209999A1 (de) * 2015-06-01 2016-12-01 Schaeffler Technologies AG & Co. KG Elektrische Maschine mit Flansch für ein Sensorelement
KR102569493B1 (ko) * 2018-05-21 2023-08-23 현대모비스 주식회사 모터 레졸버 장착구조

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004159449A (ja) * 2002-11-07 2004-06-03 Mitsubishi Electric Corp 車両用回転電機
WO2008059736A1 (fr) * 2006-11-15 2008-05-22 Mitsuba Corporation Moteur sans balai
JP2011182480A (ja) * 2010-02-26 2011-09-15 Hitachi Automotive Systems Ltd 回転電機システム
JP2013223388A (ja) * 2012-04-19 2013-10-28 Mitsubishi Electric Corp 回転角度検出器及び車両用回転電機
JP2014135834A (ja) * 2013-01-10 2014-07-24 Hitachi Industrial Equipment Systems Co Ltd レゾルバを備えた電動機及びレゾルバ付きグリース交換形電動機

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5673206B2 (ja) * 2011-02-25 2015-02-18 日本精工株式会社 ダイレクトドライブモータ、位置決め装置及び機械装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004159449A (ja) * 2002-11-07 2004-06-03 Mitsubishi Electric Corp 車両用回転電機
WO2008059736A1 (fr) * 2006-11-15 2008-05-22 Mitsuba Corporation Moteur sans balai
JP2011182480A (ja) * 2010-02-26 2011-09-15 Hitachi Automotive Systems Ltd 回転電機システム
JP2013223388A (ja) * 2012-04-19 2013-10-28 Mitsubishi Electric Corp 回転角度検出器及び車両用回転電機
JP2014135834A (ja) * 2013-01-10 2014-07-24 Hitachi Industrial Equipment Systems Co Ltd レゾルバを備えた電動機及びレゾルバ付きグリース交換形電動機

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3089332A1 (fr) * 2015-04-29 2016-11-02 Skf Magnetic Mechatronics Machine rotative
WO2018185874A1 (fr) 2017-04-05 2018-10-11 日産自動車株式会社 Structure de contremesures anticollision pour moteur
JPWO2018185874A1 (ja) * 2017-04-05 2019-11-21 日産自動車株式会社 モータの衝突対策構造
EP3609052A4 (fr) * 2017-04-05 2020-04-08 Nissan Motor Co., Ltd. Structure de contremesures anticollision pour moteur

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Publication number Publication date
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