WO2013073416A1 - Machine dynamo-électrique - Google Patents

Machine dynamo-électrique Download PDF

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Publication number
WO2013073416A1
WO2013073416A1 PCT/JP2012/078708 JP2012078708W WO2013073416A1 WO 2013073416 A1 WO2013073416 A1 WO 2013073416A1 JP 2012078708 W JP2012078708 W JP 2012078708W WO 2013073416 A1 WO2013073416 A1 WO 2013073416A1
Authority
WO
WIPO (PCT)
Prior art keywords
permanent magnet
rotor
permanent magnets
magnetic
torque
Prior art date
Application number
PCT/JP2012/078708
Other languages
English (en)
Japanese (ja)
Inventor
小林和明
Original Assignee
Kobayashi Kazuaki
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 Kobayashi Kazuaki filed Critical Kobayashi Kazuaki
Publication of WO2013073416A1 publication Critical patent/WO2013073416A1/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
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/24—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets axially facing the armatures, e.g. hub-type cycle dynamos
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2793—Rotors axially facing stators
    • H02K1/2795—Rotors axially facing stators the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2796—Rotors axially facing stators the rotor consisting of two or more circumferentially positioned magnets where both axial sides of the rotor face a stator
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
    • H02K3/18—Windings for salient poles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/24—Rotor cores with salient poles ; Variable reluctance rotors
    • H02K1/246—Variable reluctance rotors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H02K29/03—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems

Definitions

  • the present invention relates to a rotating electrical machine, and more particularly to a rotating electrical machine with reduced pulsating torque.
  • a generator energy such as hydraulic power or thermal power is converted into rotational energy, and the generator is driven by the converted rotational energy to generate power.
  • generators include a rotor in which a permanent magnet having N poles and S poles is attached to a rotating shaft, an armature core having magnetic poles corresponding to the number of magnetic poles formed by the permanent magnets, and the armature core The generator coil is wound around and the rotor is driven to rotate, thereby generating an AC magnetic field in the armature core and generating an AC voltage in the generator coil by the generated AC magnetic field.
  • an armature core constituting a rotating electric machine such as a generator or an electric motor may be disposed close to a magnet attached to the rotor to supply a sufficient magnetic field to a coil wound around the armature core. desired.
  • an attractive force acts between the permanent magnet and the iron core. This attractive force is particularly large when a strong permanent magnet is used to improve the output of the rotating electrical machine.
  • this suction force varies depending on the rotation angle of the rotor, and affects the rotation torque of the rotor.
  • this torque that is, torque based on the magnetic attractive force between the armature and the rotor (pulsation torque) increases, the rotational angular speed of the rotor varies, and the generator has abnormal vibration or noise. Problems occur. For example, in a generator used for wind power generation or the like, the starting torque at which the rotor blades start to move increases. Moreover, the resistance for continuously rotating the rotor blades also increases. Therefore, it is difficult to generate power in a breeze.
  • Patent Document 1 is known as a technique for suppressing such a problem caused by pulsating torque.
  • the force attracted by the iron pieces and the force attracted by the magnet pieces of the other power generation means and the iron pieces of the yoke are offset.
  • Patent Document 2 discloses a rotating plate in which a plurality of rectangular magnets whose longitudinal direction intersects the rotating direction of the rotating plate are arranged and the polarities of adjacent magnets are alternately different from each other, and the rotating plate
  • a rotating electrical machine including an armature in which a plurality of armature cores provided at positions where the magnet of the specific magnetic pole is sandwiched from above and below the rotating plate are disposed, and a common winding is wound between the plurality of armature cores It is shown.
  • the power generation means has a structure in which a plurality of electromotive means are connected to one rotating shaft.
  • the electromotive means includes a permanent magnet in which magnetic poles are arranged radially and alternately along the circumferential direction with respect to a rotating shaft to which a rotational force is supplied from the outside, and a bobbin is provided on the outer periphery of the rotating shaft.
  • an attraction means having a plurality of attracted pieces.
  • the attraction means is means for reducing pulsation torque, which is attraction applied to the rotating shaft, by canceling out to some extent the attraction acting between the pole of the permanent magnet and the attracted piece.
  • the structure of the power generation means is complicated. In addition, it is difficult to reduce the size of the power generation means.
  • the present invention has been made in view of these problems, and provides a rotating electrical machine capable of suppressing the influence of pulsating torque on the rotation of a rotor.
  • the present invention employs the following means in order to solve the above problems.
  • a plurality of permanent magnets arranged concentrically with the rotation axis and in parallel with the rotation axis at an equal interval and having alternate magnetization directions; and a magnetic body arranged with a non-magnetic material sandwiched between the permanent magnets And a stator core disposed so as to connect the front end portion and the back end portion of the permanent magnet via gaps, respectively, and a coil wound around the stator core.
  • the present invention has the above configuration, the influence of pulsation torque on the rotation of the rotor can be suppressed, and the rotor can be rotated smoothly.
  • FIG. 1 is a perspective view for explaining a generator (24 poles) according to the first embodiment
  • FIG. 2 is a view for explaining a rotor shown in FIG. 1
  • FIG. 2a is a 12 pole
  • FIG. 2b Indicates the case of 6 poles.
  • 10 is a rotating electrical machine
  • 11 is a rotating shaft
  • 12 is a rotor
  • 12M (12M-1, 12M-2) Is a permanent magnet, concentric with the rotating shaft 11 and the rotating shaft 11.
  • the plurality of magnets are arranged at equal intervals so that the magnetization directions alternate.
  • Reference numeral 13 (13-1, 13-2,...) Denotes a C-shaped stator iron core. The stator iron core is accommodated in a housing (not shown).
  • a rotating shaft 11 passes through the rotor 12, and the rotating shaft 11 is supported by the housing via a bearing (not shown).
  • Magnetic plates 12F and 12R are arranged before and after the rotation direction W of the permanent magnet 12M.
  • a non-magnetic plate 12C is disposed between adjacent permanent magnets 12M via magnetic plates 12F and 12R.
  • a stainless steel plate, a bakelite plate or the like is used as the nonmagnetic plate 12C, and an electromagnetic steel plate is used as the magnetic plates 12F and 12R.
  • the C-shaped stator cores 13 (13-1, 13-2...) are front end portions (upper side surfaces in the figure) of the plurality of permanent magnets 12M (12M-1, 12M-2). ) And the rear end (the lower side of the figure) are arranged so as to be connected via a gap. Moreover, the coil 14 is each wound around a C-shaped stator iron core, and these coils are connected in series, for example.
  • the magnetic flux passing through the permanent magnet ⁇ the stator iron core ⁇ the permanent magnet is intermittent, and an AC output can be obtained from the coil 14.
  • the coil 14 is wound around each of the straight portions (14a, 14b, 14c, 14d, and 14e) of the C-shaped stator iron core, but may be wound only around 14a and 14e, for example.
  • FIG. 3 is a diagram in which the front surface of the permanent magnet 12 ⁇ / b> M arranged on the rotor is opposed to the front surface of the stator iron core in its entirety. Is in a position facing the entire back surface of the stator core.
  • 3, 4, 5, and 6 show a plurality of permanent magnets, magnetic plates, nonmagnetic plates, and portions of the C-shaped stator core that constitute the rotor 12 that face the permanent magnets. It is a figure developed and shown along the surface.
  • FIG. 4 shows a state in which the rotor 12 has rotated and the permanent magnet has moved to the left by half of the magnet width.
  • the latter half of the permanent magnet movement direction (the right half of the permanent magnet) and the magnetic plate 12R Opposite the front and back of the stator core.
  • FIG. 5 further shows a state in which the rotor has rotated and the permanent magnet has moved 1 ⁇ 2 of the magnet width in the left direction, and the permanent magnet does not face either the front surface or the back surface of the stator core.
  • FIG. 6 further shows a state in which the rotor has rotated and the permanent magnet has moved 1/2 of the magnet width to the left, and the front half and the magnetic plate 12F in the rotational direction of the permanent magnet are the front and back surfaces of the stator core. Opposite to.
  • reluctance torque and “magnet torque” act on the rotating electrical machine.
  • the reluctance torque is a torque based on the force with which the magnet attracts a magnetic body such as an iron core, and the magnet torque is a torque based on the force with which the magnetic poles repel or attract each other.
  • the magnetic flux ⁇ m generated by the permanent magnet 12M-2 passes through the permanent magnet 12M-2 ⁇ the front surface of the stator core 13 ⁇ the back surface of the stator core 13 ⁇ the permanent magnet 12M-2. Interlinking with the power generation coil 14 wound around the stator core. An electromotive force e is induced in the power generation coil 14 with the linkage.
  • a part ⁇ m of the magnetic flux ⁇ m passes through the magnetic plates 12F and 12R and returns to the permanent magnet.
  • an electromotive force e is induced in the power generation coil wound around the stator core, a load current ic flows through the power generation coil, and a load magnetic flux 2 ⁇ c ( ⁇ c1 + ⁇ c2) is generated.
  • the load magnetic flux 2 ⁇ c mainly passes through the magnetic plates 12F and 12R arranged before and after the rotation direction of the permanent magnet. That is, a part ⁇ c1 of 2 ⁇ c passes through the magnetic plate 12R, and a part ⁇ c2 of 2 ⁇ c passes through the magnetic plate 12F.
  • the magnetic flux ⁇ c1 + ⁇ m and the magnetic flux ⁇ c2- ⁇ m pass through the magnetic plates 12F and 12R of the rotor, respectively. This magnetic flux generates torque that drives the rotor in the left direction.
  • the torque that drives the rotor in the left direction is opposite to the reluctance torque that acts between the permanent magnet and the stator core. For this reason, the pulsation torque based on the reluctance torque acting between the permanent magnet and the stator iron core can be suppressed.
  • an electromotive force e is induced in the power generation coil wound around the rear stator core, a load current ic flows through the power generation coil, and a load magnetic flux 2 ⁇ c is generated.
  • the load magnetic flux 2 ⁇ c mainly passes through the magnetic plates 12F and 12R arranged before and after the rotation direction of the permanent magnet. That is, a part ⁇ c1 of ⁇ c passes through the magnetic plate 12F, and a part ⁇ c2 of ⁇ c passes through the magnetic plate 12R.
  • the magnetic fluxes ⁇ c1 + ⁇ m and the magnetic flux ⁇ C2- ⁇ m pass through the rotor magnetic plates 12F and 12R, respectively.
  • the magnetic flux generates torque that drives the rotor in the right direction.
  • the torque that drives the rotor in the right direction is opposite to the reluctance torque that acts between the permanent magnet and the stator iron core. For this reason, the pulsation torque based on the reluctance torque acting between the permanent magnet and the stator iron core can be suppressed.
  • the shape of the stator iron core is a C-shaped stator iron core 13 (13-1, 13-2,...), The front end (lower side) of the permanent magnet 12M and the rear end (upper side of the figure). ) As long as it can be connected via a gap.
  • the pulsation torque based on the reluctance torque can be suppressed.
  • stator iron cores (first stator iron cores) are arranged at intervals in the rotational direction. For this reason, for example, when the rotor is at the position shown in FIG. 5, the magnetic flux emitted from the permanent magnet is not effectively used.
  • second stator cores (13-1 ′, 13-2 ′%) Having the same shape as the first stator core are prepared, and this is shown in FIG. 1 between the stator iron cores (13-1, 13-2,). For this reason, the permanent magnet of the rotor is placed at a position that affects any of the stator cores, and the output of the rotating electrical machine can be increased.
  • the repulsive torque generated by the magnetic flux ⁇ c1 + ⁇ m and the magnetic flux ⁇ c2- ⁇ m passing through the magnetic plates 12F and 12R of the rotor is used to suppress the pulsation torque based on the reluctance torque.
  • the torque can be generated by exciting a coil wound around the stator core.
  • FIGS. 7A and 7B are diagrams for explaining the pulsation torque suppression operation by the pulse current, in which the rotor and the armature portion of the generator including the first and second stator cores are arranged in the circumferential direction.
  • the rotation direction (example in the figure)
  • the facing area between the side a of the stator iron core 13-1 preceding in the left direction and the permanent magnet 12M-1 is such that the side b of the stator iron core 13-1 ′ following in the rotation direction faces the permanent magnet.
  • a pulse current is supplied to a coil (pulsation suppressing coil) wound around the stator core 13-1 'so that a magnetic pole is generated in a direction in which the permanent magnet is repelled.
  • the pulsation suppression coil can be shared with the power generation coil.
  • the magnetic poles at the positions indicated by “N” and “S” on the stator core are pulse currents supplied to a coil (pulsation suppression coil) wound around the magnetic poles.
  • the magnetic pole formed by is shown.
  • the pulsation suppressing coil may be wound around one place (for example, the stator core 13-1).
  • the pulse current is supplied to a circuit in which the pulsation suppressing coil is wound around all of the second stator cores and these are connected in series. Also good.
  • the supply timing of the pulse current supplied to the pulsation suppression coil can be obtained from a position sensor or the like that detects the rotational position of the rotor.
  • the pulse current can be constituted by a current consisting of one pulse or a current consisting of a plurality of pulses.
  • the pulsating torque can be suppressed by supplying the pulse current so that the magnetic pole is generated in the direction of attracting or repelling the permanent magnet and driving the rotor.
  • the pulsation suppressing coil wound around the first or second stator core is Since a pulse current is supplied in a direction that attracts or repels the magnet, it is possible to suppress the pulsating torque by generating a torque that opposes the pulsating torque.

Abstract

L'invention concerne une machine dynamo-électrique configurée de manière à ce que l'influence d'un couple impulsionnel sur la rotation du rotor soit réduite pour permettre au rotor de tourner régulièrement. Une machine dynamo-électrique comprend : un rotor muni d'aimants permanents agencés coaxialement par rapport à l'arbre de rotation à des intervalles réguliers de manière à ce qu'ils soient parallèles à l'arbre rotatif et de manière à ce que les directions de magnétisation alternent, ainsi que de corps magnétiques disposés entre les aimants permanents, les corps non magnétiques étant intercalés entre les corps magnétiques ; des noyaux de stator qui sont disposés de manière à connecter les extrémités de face avant et les extrémités de face arrière des aimants permanents pendant que des entrefers d'air sont formés entre les noyaux de stator et les extrémités de face avant et arrière ; et des bobines enroulées sur les noyaux de stator.
PCT/JP2012/078708 2011-11-15 2012-11-06 Machine dynamo-électrique WO2013073416A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011-249674 2011-11-15
JP2011249674A JP5372115B2 (ja) 2011-11-15 2011-11-15 回転電機

Publications (1)

Publication Number Publication Date
WO2013073416A1 true WO2013073416A1 (fr) 2013-05-23

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Application Number Title Priority Date Filing Date
PCT/JP2012/078708 WO2013073416A1 (fr) 2011-11-15 2012-11-06 Machine dynamo-électrique

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JP (1) JP5372115B2 (fr)
WO (1) WO2013073416A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5596646B2 (ja) * 2011-09-20 2014-09-24 和明 小林 回転電機
JP6545025B2 (ja) * 2015-07-17 2019-07-17 小林　和明 回転電機
JP6350612B2 (ja) * 2016-08-16 2018-07-04 マツダ株式会社 回転電機
JP6350613B2 (ja) * 2016-08-16 2018-07-04 マツダ株式会社 回転電機
JP6944750B2 (ja) * 2017-01-25 2021-10-06 Ｊｒ東日本コンサルタンツ株式会社 発電装置及び発電システム

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001136721A (ja) * 1999-08-26 2001-05-18 Toyota Motor Corp 軸方向間隙型永久磁石同期機
JP2008172884A (ja) * 2007-01-10 2008-07-24 Honda Motor Co Ltd アキシャルギャップ型モータおよび電動パワーステアリング装置
JP2009118551A (ja) * 2007-11-01 2009-05-28 Honda Motor Co Ltd アキシャルギャップ型モータ
WO2010150492A1 (fr) * 2009-06-23 2010-12-29 国立大学法人北海道大学 Moteur axial
JP2011101545A (ja) * 2009-11-09 2011-05-19 Hitachi Ltd 回転電機

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001136721A (ja) * 1999-08-26 2001-05-18 Toyota Motor Corp 軸方向間隙型永久磁石同期機
JP2008172884A (ja) * 2007-01-10 2008-07-24 Honda Motor Co Ltd アキシャルギャップ型モータおよび電動パワーステアリング装置
JP2009118551A (ja) * 2007-11-01 2009-05-28 Honda Motor Co Ltd アキシャルギャップ型モータ
WO2010150492A1 (fr) * 2009-06-23 2010-12-29 国立大学法人北海道大学 Moteur axial
JP2011101545A (ja) * 2009-11-09 2011-05-19 Hitachi Ltd 回転電機

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