WO2015181895A1 - Machine électrique tournante - Google Patents

Machine électrique tournante Download PDF

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Publication number
WO2015181895A1
WO2015181895A1 PCT/JP2014/064001 JP2014064001W WO2015181895A1 WO 2015181895 A1 WO2015181895 A1 WO 2015181895A1 JP 2014064001 W JP2014064001 W JP 2014064001W WO 2015181895 A1 WO2015181895 A1 WO 2015181895A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
rotating electrical
electrical machine
permanent magnet
magnetic pole
Prior art date
Application number
PCT/JP2014/064001
Other languages
English (en)
Japanese (ja)
Inventor
荘平 大賀
隆明 石井
石橋　利之
敦志 川原
Original Assignee
株式会社安川電機
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 株式会社安川電機 filed Critical 株式会社安川電機
Priority to PCT/JP2014/064001 priority Critical patent/WO2015181895A1/fr
Publication of WO2015181895A1 publication Critical patent/WO2015181895A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/02—Details
    • H02K21/04—Windings on magnets for additional excitation ; Windings and magnets for additional excitation

Definitions

  • the disclosed embodiment relates to a rotating electrical machine.
  • Patent Document 1 describes a brushed motor including a stator and a rotor.
  • the rotor includes a core fixed to the shaft and a plurality of coils provided at equal intervals on the peripheral side of the core.
  • the present invention has been made in view of such problems, and an object thereof is to provide a rotating electrical machine capable of achieving both a large torque and a high speed rotation.
  • a rotating electrical machine including a stator and a rotor, the rotor including a plurality of teeth portions projecting radially outward from the shaft.
  • a rotating electrical machine having an iron core, a rotor winding wound around each of the plurality of tooth portions, and a plurality of permanent magnets disposed between the plurality of tooth portions is applied.
  • a rotating electrical machine including a stator and a rotor, the rotor core including a plurality of teeth portions that protrude radially outward from the shaft and separated from each other;
  • a rotating electric machine comprising: means for holding the rotor winding wound around the teeth portion on the teeth portion; and means for holding a permanent magnet disposed between the teeth portions on the teeth portion.
  • the rotating electrical machine 1 includes a stator 2 and a rotor 3 disposed on the radially inner side of the stator 2.
  • the rotating electrical machine 1 is used as a motor or a generator.
  • the rotating electrical machine 1 is attached to the substantially cylindrical frame 4, the stator 2 provided on the inner periphery of the frame 4, the rotor 3 provided inside the stator 2, and the rotor 3.
  • the shaft 10 is provided so as to close the load side bracket 11 provided to close one side (right side in FIG. 1) of the frame 4 and the other side (left side in FIG. 1) of the frame 4.
  • the anti-load side bracket 13 is rotatably supported via a load side bearing 12 and an anti load side bearing 14.
  • the load side bracket 11 is provided with a bearing cover 21 outside the load side bearing 12.
  • load side refers to the direction in which the shaft 10 protrudes from the rotating electrical machine 1 (right side in FIG. 1)
  • anti-load side refers to the direction opposite to the load side, that is, the rotating electrical machine 1.
  • the direction in which the encoder 15 is arranged is indicated.
  • a permanent magnet 15a constituting an encoder 15 and a slip ring 16 are provided at an end portion on the opposite side of the shaft 10 protruding from the opposite side bracket 13 on the opposite side.
  • a cover 18 is attached to the anti-load side bracket 13 to cover the end of the shaft 10 on the anti-load side.
  • the cover 18 is provided with a position detector 15b that constitutes the encoder 15 and a brush 17 that is electrically connected to an external power source via an inverter (not shown).
  • the position detector 15b detects the rotational position of the shaft 10 by detecting the magnetism of the permanent magnet 15a.
  • the brush 17 contacts the slip ring 16 connected to the rotor winding 31 of the rotor 3 and supplies power from the external power source to the rotor winding 31.
  • a ring-shaped stationary ring member 19 having an annular groove portion 19 a is disposed at the axially inner side position of the load side bracket 11 and the anti-load side bracket 13.
  • the fixed ring member 19 is fixed to the shaft 10 so as to be in contact with the axial end of the rotor core 30 of the rotor 3, and is a portion protruding in the axial direction from the rotor core 30 of the rotor winding 31 in the groove 19 a.
  • the coil end portion 31a is housed.
  • the stator 2 has a substantially annular stator core 5 fixed to the inner periphery of the frame 4 and a stator winding 6 wound around a plurality of teeth portions of the stator core 5.
  • a substantially annular connection board 20 that is electrically connected to an external power source.
  • the terminal portion of the stator winding 6 is connected by a connection board 20.
  • the whole of the stator core 5, the stator winding 6 and the wiring board 20 is integrally resin-molded (not shown) with press-fitted resin.
  • the structure of the rotor 3 is demonstrated using FIG.2 and FIG.3.
  • the rotor 3 includes the rotor core 30 fixed to the shaft 10, and a plurality (10 in this example) of the rotor windings provided on the rotor core 30. 31 and a plurality (10 in this example) of permanent magnets 32.
  • the numbers of rotor windings 31 and permanent magnets 32 are not limited to this.
  • the rotor core 30 includes a plurality of (in this example, 10) teeth portions 35 that protrude radially outward from the shaft 10.
  • the number of the teeth parts 35 is not limited to this. More specifically, the rotor core 30 has a hole portion 34 a at the center and a substantially cylindrical inner peripheral portion 34 fixed to the shaft 10 inserted through the hole portion 34 a, and a diameter larger than the inner peripheral portion 34. And the teeth portion 35 projecting outward in the direction.
  • the rotor core 30 has an integral structure in which an inner peripheral portion 34 and a plurality of tooth portions 35 are integrated. As shown in FIG. 3, the rotor winding 31 and the permanent magnet 32 are arranged in the order of the rotor winding 31 and the permanent magnet 32 from the radially inner side to the outer side between the plurality of tooth portions 35. ing.
  • the teeth part 35 has a magnetic pole part 36 disposed on the outer peripheral part of the rotor core 30 and a connecting part 37 that connects the magnetic pole part 36 and the inner peripheral part 34 in the radial direction.
  • the magnetic pole portion 36 has a substantially fan shape when viewed from the axial direction, and is formed thicker in the circumferential direction than the connecting portion 37.
  • a substantially rectangular magnet gap 38 is formed between the adjacent magnetic pole portions 36, and the permanent magnet 32 is accommodated in the magnet gap 38 and fixed by adhesion or the like.
  • the magnetic pole portion 36 has a flange portion 36a protruding in the circumferential direction on both sides of the outer peripheral portion.
  • the collar portion 36 a covers a part of the outer periphery of the permanent magnet 32.
  • the brim portions 36a of the adjacent teeth portions 35 face each other in the circumferential direction with a small gap 39 therebetween. That is, the plurality of tooth portions 35 are separated from each other with a small gap 39 therebetween.
  • the permanent magnet 32 is magnetized in the circumferential direction and fixed to the two magnetic pole portions 36 on both sides in the circumferential direction.
  • a minute gap may be provided between the permanent magnet 32 and the magnetic pole portion 36 and fixed by, for example, an adhesive, or the permanent magnet 32 and the magnetic pole portion 36 may be directly contacted without using an adhesive. It may be fixed.
  • the permanent magnet 32 is partially covered on the outer periphery by the flange 36 a and is exposed radially outward through the small gap 39.
  • the plurality of permanent magnets 32 accommodated in the plurality of magnet gaps 38 are in a mode in which the same magnetic poles of the S or N poles are opposed to each other between the adjacent permanent magnets 32 in the circumferential direction. Are arranged so as to alternately repeat the S pole and the N pole.
  • the connecting portion 37 has a substantially rectangular shape when viewed from the axial direction, and is thinner than the magnetic pole portion 36 in the circumferential direction.
  • a substantially fan-shaped winding gap 40 is formed between adjacent connecting portions 37.
  • the winding gap 40 is in communication with the magnet gap 38. That is, the rotor core 30 is configured such that no magnetic material exists between the magnet gap 38 and the winding gap 40.
  • a rotor winding 31 is wound around the connecting portion 37.
  • the rotor winding 31 wound around the connecting portion 37 is accommodated in the winding gap 40 and at least a part of the outer periphery thereof is supported by the magnetic pole portion 36 (with respect to centrifugal force).
  • a step portion 35a is formed between the connecting portion 37 and the magnetic pole portion 36 due to the difference in thickness thereof, and the rotor winding 31 wound around the connecting portion 37 is at least a part of the outer periphery. Is covered with a stepped portion 35a.
  • FIG. 4 shows an example of the state of the field magnetic flux of the rotor 3 when the rotor winding 31 is not energized.
  • a part of the magnetic flux emitted from the N pole of the two permanent magnets 32 adjacent to each other with the magnetic pole portion 36 interposed therebetween leaks from the magnetic pole portion 36 through the connecting portion 37 and passes through the inner peripheral portion 34. q1.
  • the field magnetic flux Q directed radially outward from the magnetic pole portion 36 has a medium strength.
  • FIG. 5 shows an example of the state of the field flux of the rotor 3 when the rotor winding 31 is energized in the direction of weakening the field flux.
  • the magnetic flux q2 generated by the rotor winding 31 causes a leakage flux from the magnetic pole portion 36 to the inner peripheral portion 34 side.
  • q1 becomes large.
  • the direction of the magnetic flux q2 by the rotor winding 31 at this time is from the radially outer side to the inner side in the N-pole magnetic pole portion 36, and from the radially inner side to the outer side in the S-pole magnetic pole portion 36.
  • the leakage flux q1 increases, the field flux Q decreases from the time of no energization shown in FIG. Note that the amount of decrease in the field magnetic flux Q is controlled by the amount of current supplied to the rotor winding 31.
  • FIG. 6 shows an example of the state of the field magnetic flux of the rotor 3 when the rotor winding 31 is energized in the direction of increasing the field magnetic flux.
  • a current i is applied to the rotor winding 31 in the direction of increasing the field magnetic flux
  • the magnetic flux q2 generated by the rotor winding 31 causes a leakage flux from the magnetic pole portion 36 to the inner peripheral portion 34 side.
  • q1 decreases or disappears.
  • the direction of the magnetic flux q2 by the rotor winding 31 is from the radially inner side to the outer side in the N-pole magnetic pole portion 36, and from the radially outer side to the inner side in the S-pole magnetic pole portion 36.
  • the field magnetic flux Q increases from the time of no energization shown in FIG.
  • the increase amount of the field magnetic flux Q is controlled by the energization amount of the rotor winding 31.
  • the collar portion 36a corresponds to an example of a means for holding the permanent magnet disposed between the teeth portions in the teeth portion, and the rotor winding in which the step portion 35a is wound around the teeth portion is held in the teeth portion. This corresponds to an example of the means to do.
  • the rotating electrical machine 1 includes the rotor core 30 including the plurality of tooth portions 35 projecting radially outward from the shaft 10 and the rotor wound around each of the plurality of tooth portions 35. It has the coil
  • the field winding Q is increased by energizing the rotor winding 31 in the direction in which the magnetic flux generated by the permanent magnet 32 is increased, and the field is applied by energizing the rotor winding 31 in the direction of weakening the magnetic flux generated by the permanent magnet 32.
  • the magnetic flux Q is decreased.
  • the plurality of tooth portions 35 are separated from each other.
  • produces between the teeth parts 35 can be reduced.
  • the rotor windings 31 can be wound around the teeth portions 35 from the outer peripheral side of the rotor core 20 by using the small gaps 39 that are the gaps between the teeth portions 35.
  • the rotor core 30 with which each teeth part 35 was united is realizable.
  • the rotor winding 31 and the permanent magnet 32 are arranged in the order of the rotor winding 31 and the permanent magnet 32 from the radially inner side to the outer side between the plurality of tooth portions 35. Is done. Thereby, at least a part of the outer periphery of the rotor winding 31 can be supported by the permanent magnet 32 (with respect to centrifugal force). Further, it is possible to adopt a manufacturing method in which the permanent magnet 32 is inserted between the teeth portions 35 after the rotor winding 31 is wound around the teeth portions 35.
  • the tooth portion 35 connects the magnetic pole portion 36 disposed on the outer peripheral portion of the rotor core 30 and the magnetic pole portion 36 and the inner peripheral portion 34 fixed to the shaft 10 in the radial direction.
  • the permanent magnet 32 is disposed between the magnetic pole portions 36, and the rotor winding 31 is wound around the connecting portion 37.
  • the permanent magnet when considering a configuration in which a permanent magnet is disposed in the center portion in the circumferential direction of the magnetic pole portion 36, the permanent magnet is disposed between the connecting portion 37 serving as the iron core of the rotor winding 31 and the stator 2. It will be. In this case, there is a possibility of demagnetizing the permanent magnet when the rotor winding 31 is energized in a direction that weakens the magnetic flux generated by the permanent magnet.
  • the permanent magnet 32 can be prevented from being demagnetized between the connecting portion 37 and the stator 2 by the above-described configuration, so that demagnetization of the permanent magnet 32 can be prevented.
  • the magnetic pole portion 36 is formed thicker in the circumferential direction than the connecting portion 37 and supports at least a part of the outer periphery of the rotor winding 31 wound around the connecting portion 37. Accordingly, at least a part of the outer periphery of the rotor winding 31 can be supported against the centrifugal force, so that the rotor winding 31 can be firmly held. Accordingly, it is possible to prevent the rotor winding 31 from dropping or deforming.
  • the permanent magnet 32 is magnetized in the circumferential direction and is fixed to the two magnetic pole portions 36 on both sides in the circumferential direction by adhesion.
  • the rotor core 30 has a so-called open slot structure (a structure in which the winding gap 40 in which the rotor winding 31 is accommodated opens to the outer periphery of the rotor core 30). can do.
  • each permanent magnet 32 is fixed to the two magnetic pole portions 36 on both sides in the circumferential direction by bonding, there is no need to separately prepare a fixing member for the permanent magnet 32.
  • the magnetic pole portion 36 has a flange portion 36 a that covers a part of the outer periphery of the permanent magnet 32 on both sides in the circumferential direction.
  • the collar portion 36a makes it possible to support both sides in the circumferential direction of the outer periphery of the permanent magnet 32 against centrifugal force, so that the permanent magnet 32 can be firmly held. Therefore, the permanent magnet 32 can be prevented from falling off.
  • the rotor core 30 has a structure in which the inner peripheral portion 34 and the teeth portion 35 are integrated. Thereby, the intensity
  • the rotor core 30 is formed between the plurality of tooth portions 35.
  • the magnet gap 38 for accommodating the permanent magnet 32 and the winding for accommodating the rotor winding 31 are formed. It is comprised so that a magnetic body may not exist between the gaps 40 for use. Thereby, the leakage magnetic flux which generate
  • the rotating electrical machine 1 includes a groove portion 19 a that is fixed to the shaft 10 so as to be in contact with the axial end portion of the rotor core 30 and that houses the coil end portion 31 a of the rotor winding 31.
  • the fixed ring member 19 is provided. With this fixed ring member 19, the axial position of the rotor core 30 can be positioned. Further, since the coil end portion 31a of the rotor winding 31 can be supported against the centrifugal force by the groove portion 19a of the stationary ring member 19, deformation of the coil end portion 31a can be prevented.
  • holes for circulating the cooling medium may be formed in places of the stationary ring member 19.
  • the method of supplying power to the rotor winding 31 is not limited to the method using the slip ring 16 and the brush 17, and other methods may be used.
  • a method of supplying power using a rotary connector or a method of supplying power by rectifying to direct current after supplying alternating current using a transformer may be used.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

L'invention a pour but de rendre possible l'augmentation aussi bien du couple que de la vitesse de rotation d'une machine électrique tournante. Pour atteindre ce but, l'invention concerne une machine électrique tournante (1) pourvue d'un stator (2) et d'un rotor (3), ladite machine électrique tournante (1) comprenant : un arbre (10) ; un noyau de rotor (30) pourvu d'une partie périphérique intérieure (34) fixée à l'arbre (10) et d'une pluralité de dents (35) faisant saillie de la partie périphérique intérieure (34) vers l'extérieur dans la direction radiale ; un enroulement de rotor (31) enroulé autour de chaque dent de la pluralité de dents (35) ; une pluralité d'aimants permanents (32) disposés entre les dents (35) adjacentes.
PCT/JP2014/064001 2014-05-27 2014-05-27 Machine électrique tournante WO2015181895A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2014/064001 WO2015181895A1 (fr) 2014-05-27 2014-05-27 Machine électrique tournante

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2014/064001 WO2015181895A1 (fr) 2014-05-27 2014-05-27 Machine électrique tournante

Publications (1)

Publication Number Publication Date
WO2015181895A1 true WO2015181895A1 (fr) 2015-12-03

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PCT/JP2014/064001 WO2015181895A1 (fr) 2014-05-27 2014-05-27 Machine électrique tournante

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3373426A1 (fr) * 2017-03-06 2018-09-12 Hamilton Sundstrand Corporation Machine synchrone à rotor bobiné à aimants permanents

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4139843C1 (en) * 1991-12-03 1993-06-24 Albert 7880 Bad Saeckingen De Mutter Dynamoelectric machine, esp. for car - has salient pole laminated rotor with permanent magnets between poles plus extra slip ring-fed excitation winding
EP1209798A1 (fr) * 2000-11-23 2002-05-29 Delphi Technologies, Inc. Rotor à pôles saillants bobinés pour machine électrique
JP2008228460A (ja) * 2007-03-13 2008-09-25 Kanazawa Inst Of Technology 回転機及び回転機を製造する方法
JP2013009553A (ja) * 2011-06-27 2013-01-10 Toyota Central R&D Labs Inc 回転電機のロータ

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4139843C1 (en) * 1991-12-03 1993-06-24 Albert 7880 Bad Saeckingen De Mutter Dynamoelectric machine, esp. for car - has salient pole laminated rotor with permanent magnets between poles plus extra slip ring-fed excitation winding
EP1209798A1 (fr) * 2000-11-23 2002-05-29 Delphi Technologies, Inc. Rotor à pôles saillants bobinés pour machine électrique
JP2008228460A (ja) * 2007-03-13 2008-09-25 Kanazawa Inst Of Technology 回転機及び回転機を製造する方法
JP2013009553A (ja) * 2011-06-27 2013-01-10 Toyota Central R&D Labs Inc 回転電機のロータ

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3373426A1 (fr) * 2017-03-06 2018-09-12 Hamilton Sundstrand Corporation Machine synchrone à rotor bobiné à aimants permanents

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