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WO2009063350A2 - Rotor à aimants permanents pour machine électrique synchrone, en particulier pour un moteur à réluctance - Google Patents

Rotor à aimants permanents pour machine électrique synchrone, en particulier pour un moteur à réluctance Download PDF

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Publication number
WO2009063350A2
WO2009063350A2 PCT/IB2008/054477 IB2008054477W WO2009063350A2 WO 2009063350 A2 WO2009063350 A2 WO 2009063350A2 IB 2008054477 W IB2008054477 W IB 2008054477W WO 2009063350 A2 WO2009063350 A2 WO 2009063350A2
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
stack
plates
cavities
magnetic material
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/IB2008/054477
Other languages
English (en)
Other versions
WO2009063350A3 (fr
Inventor
Giovanni Baino
Andrea Carrer
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.)
Askoll P&C SRL
Original Assignee
Askoll P&C SRL
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 Askoll P&C SRL filed Critical Askoll P&C SRL
Publication of WO2009063350A2 publication Critical patent/WO2009063350A2/fr
Publication of WO2009063350A3 publication Critical patent/WO2009063350A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
    • 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

Definitions

  • Permanent magnet rotor for a synchronous electrical machine, particularly for a reluctance motor
  • the present invention relates to a rotor for a synchronous electrical machine, particularly for a reluctance motor, provided with permanent magnets.
  • the invention relates to a rotor with N poles, where N is an even integer, comprising a stack of plates of magnetic material, each having N adjacent angular sectors, in each of which is formed a corresponding plurality of cavities or apertures, into which there extend corresponding permanent magnetic elements which are magnetized in each sector in the opposite direction to those in the adjacent sectors.
  • such a rotor is made by inserting "solid" permanent magnets, for example permanent magnets made from neodymium, iron and boron, into the cavities of its angular sectors.
  • One object of the present invention is therefore to propose an alternative method of making a rotor for a synchronous electrical machine, particularly for a reluctance motor, which overcomes the aforementioned problems of the prior art.
  • a rotor of the type specified above characterized in that the aforesaid permanent magnetic elements are formed from a magnetic material which is injection moulded in the apertures or cavities of the stack of plates.
  • the solution according to the invention enables the permanent magnets to be formed in situ in the cavities in an extremely simple way, even in cases in which continuous or progressive skewing is present in the plates of the rotor stack.
  • the permanent magnetic elements can be overmoulded on the rotor plate stack in the presence of a magnetic field such that the magnetic domains of the permanent magnetic elements associated with each sector of the rotor can be orientated in the desired way.
  • the magnetic material can be moulded, by injection moulding for example, in the absence of magnetization in the mould, and the desired orientation of the domains can be obtained subsequently, outside the mould, using known types of magnetizing equipment.
  • the desired orientation of the domains of the moulded permanent magnetic elements can be obtained by applying a magnetic field in the mould during the injection moulding, and by then carrying out a further magnetization operation after moulding, in a known type of magnetizing equipment.
  • Figure 1 is a partial view in cross section of a four-pole rotor made according to the present invention.
  • Each of the angular sectors 1-4 has a corresponding plurality of cavities or apertures C capable of forming barriers to the flow of the magnetic flux in the rotor and having a generally curved shape, with the convexity of each curve facing the axis O of the rotor R.
  • each of the radially innermost cavities C is interrupted centrally by a corresponding radial link B for structural reinforcement.
  • the stack LS of plates L is subjected to a moulding operation, such as injection moulding, by means of which elements M of permanent magnetic material are formed in the apertures or cavities C.
  • the moulded magnetic material can be, for example, a plastic-ferrite, or a neodymium-iron-boron-based material in a plastic matrix.
  • the cavities C can if necessary be filled completely by the magnetic elements moulded in them.
  • the cavities C may be only partially filled with the injection moulded magnetic elements, as shown by way of example in Figure 1.
  • the domains of the injection moulded magnetic elements can be orientated within the mould and/or after moulding, in a known type of magnetizing equipment.
  • the injection moulded magnetic material can extend at least partially over the outer faces of the terminal plates of the rotor stack LS, in order to improve and reinforce the assembly of this stack, thus facilitating the moulding of the stack.
  • the overmoulded magnetic material can subsequently be removed locally in order to improve the balance of the rotor.
  • the magnetization of the permanent magnetic elements M is essentially orientated, in a known way, in a radial direction, the direction in each sector being opposite to the direction in the adjacent sectors, as shown in Figure 1 in which the letters N and S indicate the "north" and “south” poles, respectively, of the permanent magnetic elements M.
  • the rotor according to the invention is easy to produce, even if progressive or continuous skewing is present in the stack LS of plates L.
  • the invention makes it possible to save time in the manufacture of the rotor, and enables a plurality of rotors to be produced simultaneously by using multiple moulds.

Landscapes

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

Abstract

L'invention concerne un rotor qui comporte N pôles, N étant un nombre pair, et comprend un empilement (LS) de plaques (L) de matière magnétique, chacune de celles-ci comportant N secteurs (1-4) angulaires adjacents; une pluralité correspondante de cavités ou d'ouvertures (C) sont formés dans cet empilement, et des éléments magnétiques permanents (M) correspondants se déploient à l'intérieur desdites cavités ou ouvertures. Lesdits éléments sont magnétisés dans chaque secteur (1-4) dans la direction opposée à celle des secteurs adjacents, et sont formés à partir d'une matière magnétique moulée dans les ouvertures ou cavités (C) de l'empilement (LS) des plaques (L).
PCT/IB2008/054477 2007-11-13 2008-10-29 Rotor à aimants permanents pour machine électrique synchrone, en particulier pour un moteur à réluctance Ceased WO2009063350A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT000809A ITTO20070809A1 (it) 2007-11-13 2007-11-13 Rotore a magneti permanenti per una macchina elettrica sincrona, in particolare per un motore a riluttanza.
ITTO2007A000809 2007-11-13

Publications (2)

Publication Number Publication Date
WO2009063350A2 true WO2009063350A2 (fr) 2009-05-22
WO2009063350A3 WO2009063350A3 (fr) 2009-10-15

Family

ID=40315009

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2008/054477 Ceased WO2009063350A2 (fr) 2007-11-13 2008-10-29 Rotor à aimants permanents pour machine électrique synchrone, en particulier pour un moteur à réluctance

Country Status (2)

Country Link
IT (1) ITTO20070809A1 (fr)
WO (1) WO2009063350A2 (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2378646A1 (fr) * 2010-04-15 2011-10-19 Brusa Elektronik AG Procédé et dispositif de magnétisation de machines synchrones excitées en permanence, et rotor pour de telles machines synchrones
WO2011154045A1 (fr) * 2010-06-11 2011-12-15 Abb Research Ltd Disque rotor destiné à une machine à réluctance synchrone
WO2012065857A2 (fr) 2010-11-17 2012-05-24 Ksb Aktiengesellschaft Moteur à réluctance
US9083218B2 (en) 2009-09-18 2015-07-14 Brusa Elektronik Ag Permanent magnet excited synchronous machine with embedded magnets
JP2015195650A (ja) * 2014-03-31 2015-11-05 ダイキン工業株式会社 磁石埋込型回転電気機械のロータ構造
CN106300735A (zh) * 2016-08-31 2017-01-04 法乐第(北京)网络科技有限公司 电机的转子、电机及车辆
CN106300734A (zh) * 2016-08-31 2017-01-04 法乐第(北京)网络科技有限公司 电机的转子、电机及车辆
WO2017012766A1 (fr) 2015-07-17 2017-01-26 Siemens Aktiengesellschaft Rotor à réluctance à aimantation intrinsèque supplémentaire
WO2018130490A1 (fr) * 2017-01-11 2018-07-19 Continental Automotive Gmbh Procédé de fixation d'un aimant permanent dans une poche à aimant d'un rotor pour une machine électrique, rotor et machine électrique
WO2018210577A1 (fr) * 2017-05-16 2018-11-22 Robert Bosch Gmbh Rotor et un moteur à réluctance synchrone
EP3457534A1 (fr) * 2017-09-15 2019-03-20 Toyota Jidosha Kabushiki Kaisha Machine électrique rotative

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1276487B1 (it) * 1995-07-11 1997-10-31 Alfredo Vagati Motore elettrico sincrono a riluttanza con bassa ondulazione di coppia
US5982074A (en) * 1996-12-11 1999-11-09 Advanced Technologies Int., Ltd. Axial field motor/generator
JP4726105B2 (ja) * 2001-08-03 2011-07-20 ヤマハ発動機株式会社 配向装置
JP4850528B2 (ja) * 2006-02-08 2012-01-11 トヨタ自動車株式会社 ロータの製造方法

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9083218B2 (en) 2009-09-18 2015-07-14 Brusa Elektronik Ag Permanent magnet excited synchronous machine with embedded magnets
WO2011128842A3 (fr) * 2010-04-15 2012-11-29 Brusa Elektronik Ag Procédé et dispositif permettant la magnétisation de pièces en matériau magnétique d'un rotor dans une machine synchrone à excitation permanente, et rotor pour une telle machine synchrone
WO2011128842A2 (fr) 2010-04-15 2011-10-20 Brusa Elektronik Ag Procédé et dispositif permettant la magnétisation de pièces en matériau magnétique d'un rotor dans une machine synchrone à excitation permanente, et rotor pour une telle machine synchrone
EP2378646A1 (fr) * 2010-04-15 2011-10-19 Brusa Elektronik AG Procédé et dispositif de magnétisation de machines synchrones excitées en permanence, et rotor pour de telles machines synchrones
WO2011154045A1 (fr) * 2010-06-11 2011-12-15 Abb Research Ltd Disque rotor destiné à une machine à réluctance synchrone
WO2012065857A2 (fr) 2010-11-17 2012-05-24 Ksb Aktiengesellschaft Moteur à réluctance
DE102010044046A1 (de) 2010-11-17 2012-05-24 Ksb Aktiengesellschaft Reluktanzmotor
JP2015195650A (ja) * 2014-03-31 2015-11-05 ダイキン工業株式会社 磁石埋込型回転電気機械のロータ構造
US10153670B2 (en) 2015-07-17 2018-12-11 Siemens Aktiengesellschaft Reluctance rotor having an additional inherent magnetization
CN107852046B (zh) * 2015-07-17 2019-10-08 西门子公司 具有附加的自有磁化部的磁阻转子
WO2017012766A1 (fr) 2015-07-17 2017-01-26 Siemens Aktiengesellschaft Rotor à réluctance à aimantation intrinsèque supplémentaire
CN107852046A (zh) * 2015-07-17 2018-03-27 西门子公司 具有附加的自有磁化部的磁阻转子
RU2677871C1 (ru) * 2015-07-17 2019-01-22 Сименс Акциенгезелльшафт Реактивный ротор с дополнительным собственным намагничиванием
CN106300735A (zh) * 2016-08-31 2017-01-04 法乐第(北京)网络科技有限公司 电机的转子、电机及车辆
CN106300734A (zh) * 2016-08-31 2017-01-04 法乐第(北京)网络科技有限公司 电机的转子、电机及车辆
WO2018130490A1 (fr) * 2017-01-11 2018-07-19 Continental Automotive Gmbh Procédé de fixation d'un aimant permanent dans une poche à aimant d'un rotor pour une machine électrique, rotor et machine électrique
WO2018210577A1 (fr) * 2017-05-16 2018-11-22 Robert Bosch Gmbh Rotor et un moteur à réluctance synchrone
EP3457534A1 (fr) * 2017-09-15 2019-03-20 Toyota Jidosha Kabushiki Kaisha Machine électrique rotative
US10686341B2 (en) 2017-09-15 2020-06-16 Toyota Jidosha Kabushiki Kaisha Rotating electric machine

Also Published As

Publication number Publication date
WO2009063350A3 (fr) 2009-10-15
ITTO20070809A1 (it) 2009-05-14

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