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WO2018135001A1 - Machine dynamo-électrique - Google Patents

Machine dynamo-électrique Download PDF

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Publication number
WO2018135001A1
WO2018135001A1 PCT/JP2017/002139 JP2017002139W WO2018135001A1 WO 2018135001 A1 WO2018135001 A1 WO 2018135001A1 JP 2017002139 W JP2017002139 W JP 2017002139W WO 2018135001 A1 WO2018135001 A1 WO 2018135001A1
Authority
WO
WIPO (PCT)
Prior art keywords
communication coil
iron core
partition
resolver
coil
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2017/002139
Other languages
English (en)
Japanese (ja)
Inventor
盛臣 見延
岡本　健
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP2018562850A priority Critical patent/JP6651269B2/ja
Priority to CN201780083781.7A priority patent/CN110192335B/zh
Priority to PCT/JP2017/002139 priority patent/WO2018135001A1/fr
Publication of WO2018135001A1 publication Critical patent/WO2018135001A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K24/00—Machines adapted for the instantaneous transmission or reception of the angular displacement of rotating parts, e.g. synchro, selsyn

Definitions

  • This invention relates to a rotating electric machine having a resolver.
  • a resolver has a resolver rotor and a resolver stator and is a rotational position detection device that detects the rotational position of a rotating electrical machine, etc., and is known as a rotational position detection device that has high oil resistance and can be used in oil. Yes. Since oil such as bearing grease is used in the vicinity of the bearing of the rotating electrical machine, the resolver is disposed in the vicinity of the bearing. Furthermore, when the resolver is used in oil, the resolver cable connected to the resolver stator is a flexible body, so the oil leaks due to cable deflection or deformation, etc. There is a risk of adverse effects. Therefore, it is difficult to use the resolver without taking measures against oil leakage from the resolver cable.
  • the resolver is arranged via an oil seal portion with respect to a speed reduction unit that is an oil filling portion to the bearing. That is, as shown in FIG. 1 of Patent Document 1, the lubricating oil of the speed reduction unit is prevented from moving to the electric motor side by the partition wall and the oil seal, so that the electric motor side is kept dry. Therefore, the resolver on the electric motor side is configured not to contact oil.
  • the present invention has been made to solve the above-described problems, and achieves both a resolver signal communication function and an oil sealing function of a rotating electrical machine having a resolver without using an expensive oil sealing member. It is.
  • a stator In the rotating electrical machine according to the present invention, a stator, a rotor that rotates with respect to the stator, a resolver rotor that rotates together with the rotor, a resolver stator that includes a position detection coil group that measures the rotational position of the resolver rotor, A first communication coil electrically connected to the position detection coil group of the resolver stator; a second communication coil in which a signal from the first communication coil is transmitted by electromagnetic induction; and a first communication.
  • a non-metallic partition provided between the communication coil and the second communication coil, and the second communication coil is spatially separated from the first communication coil by the partition.
  • the wiring from the resolver stator to the first communication coil is provided by providing the non-metallic partition between the first communication coil and the second communication coil. And the wiring from the second communication coil to the control device can be spatially separated.
  • FIG. 3 is an exploded perspective view showing details of the periphery of a set of communication coils in FIG. 2.
  • FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3 and shows a state where an iron core is attached to the center of the communication coil.
  • FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. 6.
  • FIG. 9 is a cross-sectional view taken along line IX-IX in FIG. 8.
  • FIG. 1 is a cross-sectional view of a rotary shaft type rotating electrical machine according to Embodiment 1 of the present invention.
  • the rotating shaft type rotating electrical machine 1 is configured in a housing 100 and includes a rotating electrical machine main body 20 and a resolver 10.
  • the rotating electrical machine body 20 includes a rotating shaft 101, a rotor 104 fixed to the rotating shaft 101, and a cylindrical stator disposed coaxially with the rotating shaft 101 and disposed outside the rotor 104. 105.
  • the rotating shaft 101 is rotatably supported via a pair of bearings 102 a and 102 b provided in the housing 100.
  • the bearing 102b is provided on the resolver 10 side, and the bearing 102a is provided on the opposite side.
  • Oil seals 103 are provided on the sides of the bearings 102a and 102b. Oil such as bearing grease is enclosed in a range surrounded by the bearing 102b and the partition portion 140 in order to make the rotation of the rotating shaft 101 smooth.
  • the rotor 104 rotates integrally with the rotation shaft 101 around the axis of the rotation shaft 101 with respect to the stator 105.
  • the rotor 104 includes a columnar rotor core that is a magnetic body arranged coaxially with the rotation shaft 101, and a plurality of permanent magnets fixed to the rotor core.
  • the stator 105 is fixed to the inner peripheral surface of the housing 100.
  • the stator 105 includes a cylindrical stator core that surrounds the outer periphery of the rotor 104, and a plurality of stator coils that are arranged in the circumferential direction of the stator core.
  • the resolver 10 includes a resolver rotor 111, a resolver stator 114, a first communication coil group 120, a partition 140, a second communication coil group 130, and a resolver cable 150.
  • the resolver rotor 111 is attached to one end of the rotating shaft 101.
  • a resolver stator 114 is provided on the inner peripheral portion of the housing 100 so as to face the resolver rotor 111.
  • the resolver stator 114 is connected to the first communication coil group 120.
  • the first communication coil group 120 is provided on one side of a non-metallic partition 140 such as resin.
  • a second communication coil group 130 is provided so as to face the first communication coil group 120.
  • the second communication coil group 130 is connected to one end of the resolver cable 150.
  • the other end of the resolver cable 150 is connected to a control device (not shown) of the rotating electrical machine.
  • FIG. 2 is a diagram schematically showing the electrical connection of the resolver 10 of the rotating electrical machine 1 shown in FIG.
  • the resolver 10 has a resolver rotor 111 at the center and a circular resolver stator 114 at the outer periphery.
  • the resolver stator 114 has a plurality of teeth. Windings are wound around the teeth, and a position detection coil group 112 is provided.
  • the position detection coil group 112 has three position detection coil groups 112a, 112b and 112c. In the position detection coil group 112a, individual position detection coils wound for each tooth are electrically connected in series. The same applies to the position detection coil groups 112b and 112c. Of the three position detection coil groups 112a, 112b and 112c, one or two systems are used for excitation. In the first embodiment, the position detection coil group 112c is used for excitation.
  • the first communication coil group 120 includes first communication coils 120a, 120b, and 120c.
  • the second communication coil group 130 includes second communication coils 130a, 130b, and 130c.
  • the position detection coil group 112a is electrically connected to the first communication coil 120a.
  • a signal from the first communication coil 120a is transmitted to the second communication coil 130a by electromagnetic induction.
  • a non-metallic partition 140 is provided between the first communication coil 120a and the second communication coil 130a. That is, the second communication coil 130a is spatially separated from the first communication coil 120a by the partition 140.
  • the position detection coil group 112b is electrically connected to the first communication coil 120b, and a partition portion is provided between the first communication coil 120b and the second communication coil 130b. 140 is provided. The same applies to the position detection coil group 112c, the first communication coil 120c, and the second communication coil 130c.
  • FIG. 3 is an exploded perspective view of two communication coils and a partition part.
  • the partition 140 has a circular through hole 141.
  • a columnar iron core 160 is provided through the through-hole portion 141 in the vertical direction.
  • a first communication coil 120a is provided on the upper side of the partition 140.
  • the first communication coil 120a includes a cylindrical insulator 121 having flange portions at both upper and lower ends, and a communication coil winding 122 is wound around the outer periphery of the cylindrical portion sandwiched between the flange portions. Yes.
  • the insulator 121 is provided with a through-hole portion 123 in the vertical direction so that it can be attached to the iron core 160.
  • a second communication coil 130a is provided below the partition 140.
  • the second communication coil 130a has a cylindrical insulator 131 having flange portions at both upper and lower ends, and a communication coil winding 132 is wound around the outer periphery of the cylindrical portion sandwiched between the flange portions. It is.
  • the insulator 131 is provided with a through-hole portion 133 in the vertical direction so that it can be attached to the iron core 160.
  • the iron core 160 constitutes a first iron core portion included in the first communication coil 120a and a second iron core portion included in the second communication coil 130a. Further, the iron core 160 constitutes an iron core portion in which the first iron core portion and the second iron core portion are integrally formed.
  • FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. As shown in FIG. 4, an iron core 160 is inserted into and fixed to the partition 140 in the through hole 141.
  • the first communication coil 120a is mounted and fixed on the upper surface of the partition portion 140 so as to have an iron core 160 therein.
  • the second communication coil 130a is attached and fixed to the lower surface of the partition portion 140 so as to have the iron core 160 therein.
  • FIG. 2 the effect
  • a magnetic circuit is excited with an alternating voltage by one or two excitation coil groups.
  • a variable reluctance type resolver with one-phase excitation and two-phase output will be described.
  • the position detection coil group 112a is configured by electrically connecting position detection coils wound around each tooth portion in series.
  • the gap between the resolver rotor 111 and the tooth portion of the resolver stator 114 differs depending on the teeth.
  • the magnetic circuit is excited by the position detection coil group 112c, a magnetic circuit having a different magnetic flux is formed on each tooth. Since the excitation voltage is an AC voltage, the magnetic flux periodically changes and the magnetic flux penetrating the teeth changes, so that a voltage is generated in each position detection coil by electromagnetic induction.
  • the position detection coil group 112a outputs the sum of the voltages generated in the position detection coils.
  • the gap between the resolver rotor 111 and each tooth constituting the position detection coil group 112a changes.
  • the magnetic flux changes in the magnetic circuit due to the change in magnetic permeability.
  • the magnetic permeability and magnetic flux in the magnetic path change periodically depending on the rotation angle of the resolver rotor 111. That is, the rotation angle of the resolver rotor 111 can be measured as a change in the output voltage of the position detection coil group 112a due to a change in the magnetic flux in the magnetic path. The same applies to the position detection coil group 112b.
  • the position detection coil groups 112a, 112b, and 112c function as an output coil that detects the position of the resolver rotor 111 and outputs a signal of the detected rotational position. Therefore, the rotational position of the resolver rotor 111 can be detected by reading the output voltages from the position detection coil groups 112a, 112b and 112c as output signals.
  • the output signal from the position detection coil group 112a is transmitted to the first communication coil 120a.
  • the output signal is transmitted from the first communication coil 120a to the second communication coil 130a by electromagnetic induction.
  • the signal is transmitted to the resolver cable 150 (see FIG. 1), and is transmitted to the controller of the rotating electrical machine.
  • an output signal from the position detection coil group 112b is transmitted in the order of the first communication coil 120b, the second communication coil 130b, and the resolver cable 150, and is transmitted to the controller of the rotating electrical machine. The same applies to the output signal from the position detection coil group 112c.
  • the second communication coil 130a is spatially separated from the first communication coil 120a by a non-metallic partition 140. Therefore, the resolver cable 150 connected to the second communication coil 130 a does not come into contact with the oil sealed in the range surrounded by the bearing 102 b and the partition portion 140.
  • the non-metallic partition part 140 is provided between the first communication coil 120a and the second communication coil 130a, so that The wiring from the first communication coil 120a and the wiring from the second communication coil 130a to the control device can be spatially separated.
  • the partition 140 positions the second communication coil 130a with respect to the first communication coil 120a.
  • magnetic flux leakage due to a shift between the center position of the first communication coil 120a and the center position of the second communication coil 130a is reduced.
  • magnetic flux leakage due to the shift of the center position in a direction perpendicular to the central axis of the iron core, that is, a so-called horizontal direction is reduced.
  • first communication coil 120a and the second communication coil 130a have the integrally formed iron core 160, magnetic flux leakage due to the gap between the iron cores of the two communication coils is reduced. Is done.
  • a member for sealing oil may be provided in the through-hole portion 141 of the partition portion 140.
  • a packing such as an O-ring may be used for this member, or a resin may be molded. Thereby, the sealing property of oil can further be improved.
  • the permanent magnet synchronous motor is used.
  • the present invention can also be applied to other motors such as an induction motor and a DC motor.
  • the resolver 10 uses a 9 ⁇ 12 slot inner rotor type, but any combination of shaft angle multiplier, number of slots, and inner rotor type or outer rotor type is within the range of functioning as a resolver. It may be adopted. Furthermore, although the resolver 10 uses a variable reluctance type resolver with one-phase excitation and two-phase output, it may be a two-phase excitation and one-phase output resolver or a rotary transformer type resolver.
  • Embodiment 2 Next, a rotating electrical machine according to Embodiment 2 will be described with reference to FIG.
  • the present invention is applied to a rotating shaft type rotating electric machine, but the second embodiment is applied to a fixed shaft type rotating electric machine.
  • the housing 200 is provided with a stator 205 on the outer peripheral side.
  • a rotor 204 having a U-shaped cross section is provided outside the housing 200, and a permanent magnet (not shown) is provided at a location facing the stator 205.
  • a bearing 202 and an oil seal 203 are provided adjacent to each other on the outer periphery of the cylindrical portion 200 a close to the central axis of the housing 200.
  • the bearing 202 rotatably supports the rotation support portion 204a of the rotor 204.
  • a resolver rotor 211 is provided on the inner periphery of the rotation support portion 204a of the rotor 204.
  • a non-metallic partition 140 is provided at the end of the cylindrical portion 200 a of the housing 200.
  • a resolver stator 214 is provided inside the housing 200 so as to face the resolver rotor 211.
  • a first communication coil group 120 is provided on the center side of the resolver stator 214.
  • a second communication coil group 130 is provided on the opposite side of the first communication coil group 120 with the partition portion 140 interposed therebetween.
  • the second communication coil group 130 is connected to one end of the resolver cable 150.
  • the other end of the resolver cable 150 is connected to a control device (not shown) of the rotating electrical machine.
  • the resolver stator 114 is provided by providing the non-metallic partition 140 between the first communication coil group 120 and the second communication coil group 130. To the first communication coil group 120 and the wiring from the second communication coil group 130 to the control device can be spatially separated.
  • the oil sealing mechanism that prevents oil such as bearing grease from leaking into the resolver cable can have a simple configuration.
  • Embodiment 3 a rotating electrical machine according to Embodiment 3 will be described with reference to FIGS. 6 and 7.
  • the iron core of the first communication coil and the iron core of the second communication coil are integrally formed.
  • the iron core of the first communication coil and the second iron core of the first communication coil are integrally formed.
  • the cores of the communication coils are formed separately, and the communication coil positioning method is different.
  • FIG. 6 is a perspective view showing details of the periphery of a set of communication coils in the rotating electrical machine according to the third embodiment.
  • FIG. 7 is a sectional view taken along line VII-VII in FIG.
  • the first communication coil 320 is provided on the upper surface of a substantially flat non-metallic partition 340.
  • the first communication coil 320 is provided by winding a winding 322 around a cylindrical first iron core 361.
  • the second communication coil 330 is provided on the lower surface of the partition portion 340.
  • the second communication coil 330 is provided by winding a winding 332 around a cylindrical second iron core 362.
  • the first iron core 361 constitutes a first iron core portion
  • the second iron core 362 constitutes a second iron core portion.
  • the partition part 340 has a first truncated cone-shaped projection 340a on the first communication coil 320 side.
  • the first iron core 361 has a columnar first recess 361a.
  • the first concave portion 361a is attached and fixed to the first convex portion 340a.
  • the partition part 340 has a truncated cone-shaped second convex part 340b on the second communication coil 330 side.
  • the second iron core 362 has a cylindrical second recess 362a.
  • the second concave portion 362a is mounted and fixed to the second convex portion 340b.
  • the first recess 361a is attached to the first protrusion 340a
  • the second recess 362a is attached to the second protrusion 340b, thereby separating the partition portion.
  • 340 positions the second communication coil 330 with respect to the first communication coil 320.
  • first iron core 361 and the second iron core 362 are formed separately, it is possible to reduce the leakage magnetic flux due to the iron core.
  • Embodiment 4 FIG. Next, a rotating electrical machine according to Embodiment 4 will be described.
  • the positioning method is different from that in the third embodiment, and the second communication coil is positioned by mounting the iron core in the recess provided in the partition portion.
  • FIG. 8 is a perspective view showing details of the periphery of a set of communication coils in the rotating electrical machine according to the fourth embodiment.
  • FIG. 9 is a sectional view taken along line IX-IX in FIG.
  • the first communication coil 420 is provided on the upper surface of a substantially flat non-metallic partition portion 440.
  • the first communication coil 420 is provided by winding a winding 422 around a cylindrical first iron core 461.
  • the second communication coil 430 is provided on the lower surface of the partition portion 440.
  • the second communication coil 430 is provided by winding a winding 432 around a cylindrical second iron core 462.
  • the first iron core 461 constitutes a first iron core portion
  • the second iron core 462 constitutes a second iron core portion.
  • the partition part 440 has a circular first recess 440a on the first communication coil 420 side.
  • a first iron core 461 is attached and fixed to the first recess 440a.
  • the partition part 440 has the circular 2nd recessed part 440b in the 2nd coil 430 for communication.
  • a second iron core 462 is attached and fixed to the second recess 440b.
  • the first communication coil 420 is positioned by fitting the inner peripheral portion of the recess 440a and the outer peripheral portion of the iron core 461 together. The same applies to the positioning of the second communication coil 430.
  • the first iron core 461 is attached to the first recess 440a
  • the second iron core 462 is attached to the second recess 440b.
  • the second communication coil 430 is positioned with respect to the first communication coil 420.
  • first iron core 461 and the second iron core 462 are formed separately, leakage flux due to the iron core can be reduced.
  • first communication coil 420 is positioned by fitting, but may be fixed by screws or bonded.
  • the number of turns of the second communication coil is the same as the number of turns of the first communication coil. Therefore, the voltage communicated between the first communication coil and the second communication coil can be made the same.
  • the number of turns of the second communication coil may be different from the number of turns of the first communication coil.
  • the amplitude of the output voltage changes depending on the winding ratio. For example, by making the number of turns of the second communication coil larger than the number of turns of the first communication coil, the voltage generated in the second communication coil is made larger than when the number of turns is the same. Can do. Also, by making the number of turns of the first communication coil connected to the excitation coil larger than the number of turns of the second communication coil, the excitation voltage can be made larger than when the number of turns is the same. it can. As a result, it is possible to reduce the output voltage due to the leakage of magnetic flux or to improve the transformation ratio of the resolver.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

La présente invention comprend : un stator ; un rotor qui tourne par rapport au stator ; un rotor de transformateur qui tourne conjointement avec le rotor ; un stator de transformateur ayant un groupe de bobines de détection de position pour mesurer la position de rotation du rotor de transformateur ; une première bobine de communication qui est électriquement connectée au groupe de bobines de détection de position du stator de transformateur ; une seconde bobine de communication avec laquelle les signaux provenant de la première bobine de communication sont transportés par induction électromagnétique ; et une unité de séparation qui n'est pas en métal, disposée entre la première bobine de communication et la seconde bobine de communication. La seconde bobine de communication est spatialement séparée de la première bobine de communication par l'unité de séparation.
PCT/JP2017/002139 2017-01-23 2017-01-23 Machine dynamo-électrique Ceased WO2018135001A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2018562850A JP6651269B2 (ja) 2017-01-23 2017-01-23 回転電機
CN201780083781.7A CN110192335B (zh) 2017-01-23 2017-01-23 旋转电机
PCT/JP2017/002139 WO2018135001A1 (fr) 2017-01-23 2017-01-23 Machine dynamo-électrique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2017/002139 WO2018135001A1 (fr) 2017-01-23 2017-01-23 Machine dynamo-électrique

Publications (1)

Publication Number Publication Date
WO2018135001A1 true WO2018135001A1 (fr) 2018-07-26

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Application Number Title Priority Date Filing Date
PCT/JP2017/002139 Ceased WO2018135001A1 (fr) 2017-01-23 2017-01-23 Machine dynamo-électrique

Country Status (3)

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JP (1) JP6651269B2 (fr)
CN (1) CN110192335B (fr)
WO (1) WO2018135001A1 (fr)

Citations (3)

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JPS6372948U (fr) * 1986-10-31 1988-05-16
JP2004132477A (ja) * 2002-10-10 2004-04-30 Koyo Seiko Co Ltd 転がり軸受装置
JP2008172932A (ja) * 2007-01-11 2008-07-24 Nippon Densan Corp レゾルバおよびレゾルバの製造方法

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JPS60230725A (ja) * 1984-04-28 1985-11-16 Tokyo Keiso Kk 回転体からの信号伝送装置
GB9011970D0 (en) * 1990-05-29 1990-07-18 Leigh Stewart Prod Electrical control system for,for example,an air spa bath
DE19544474A1 (de) * 1995-11-29 1997-06-05 Abb Patent Gmbh Elektrische Gebäudeinstallationsanlage
US7612556B2 (en) * 2002-10-10 2009-11-03 Koyo Seiko Co., Ltd. Rolling bearing
JP4073759B2 (ja) * 2002-11-07 2008-04-09 三菱電機株式会社 車両用回転電機
CN102226958B (zh) * 2011-03-11 2013-03-13 深圳市五洲龙汽车有限公司 旋转变压器固定结构和混合动力汽车
CN103187832B (zh) * 2011-12-31 2016-03-09 上海捷能汽车技术有限公司 电机系统以及使用该电机系统的电动汽车或混合动力汽车
JP5885678B2 (ja) * 2013-01-10 2016-03-15 株式会社日立産機システム 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
JP5862615B2 (ja) * 2013-07-17 2016-02-16 トヨタ自動車株式会社 レゾルバステータおよびその固定構造
CN203734463U (zh) * 2014-02-19 2014-07-23 日本精工株式会社 直接驱动电机

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6372948U (fr) * 1986-10-31 1988-05-16
JP2004132477A (ja) * 2002-10-10 2004-04-30 Koyo Seiko Co Ltd 転がり軸受装置
JP2008172932A (ja) * 2007-01-11 2008-07-24 Nippon Densan Corp レゾルバおよびレゾルバの製造方法

Also Published As

Publication number Publication date
CN110192335A (zh) 2019-08-30
CN110192335B (zh) 2021-03-26
JP6651269B2 (ja) 2020-02-19
JPWO2018135001A1 (ja) 2019-06-27

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