WO2021249590A1 - Moteur électrique à poches de réception permettant de recevoir des aimants - Google Patents

Moteur électrique à poches de réception permettant de recevoir des aimants Download PDF

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Publication number
WO2021249590A1
WO2021249590A1 PCT/DE2021/100402 DE2021100402W WO2021249590A1 WO 2021249590 A1 WO2021249590 A1 WO 2021249590A1 DE 2021100402 W DE2021100402 W DE 2021100402W WO 2021249590 A1 WO2021249590 A1 WO 2021249590A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnets
longitudinal section
electric motor
magnet
receiving
Prior art date
Application number
PCT/DE2021/100402
Other languages
German (de)
English (en)
Inventor
Jules Etienne Tegueu Simo
Holger Keck
Marcus Scherrer
Yvain-Prince Kouopi
Amelie Magnenet
Original Assignee
Schaeffler Technologies AG & Co. KG
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 Schaeffler Technologies AG & Co. KG filed Critical Schaeffler Technologies AG & Co. KG
Publication of WO2021249590A1 publication Critical patent/WO2021249590A1/fr

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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]
    • H02K1/2766—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect

Definitions

  • the invention relates to an electric motor for a hybrid or purely electrically powered motor vehicle, such as a car, truck, bus or other commercial vehicle, with a permanently excited rotor, the rotor having a base body and several magnets received in receiving pockets of the base body, and each two magnets forming a magnet pair are arranged in a substantially V-shaped arrangement / alignment with one another.
  • a hybrid or purely electrically powered motor vehicle such as a car, truck, bus or other commercial vehicle
  • each receiving pocket of the same pair of magnets has a longitudinal section of constant width holding the magnet and two widening sections adjoining the ends of the longitudinal section, which are at least partially wider than the longitudinal section.
  • the magnets of the pair of magnets which are each aligned along one of the two legs of a V, are arranged in a flat angle to each other. This results in an improvement in the efficiency of the electric motor.
  • the two receiving pockets of the same pair of magnets are designed / arranged in a mirror-inverted manner with respect to a radially extending reference plane. This results in a strength of the rotor independent of the direction of rotation.
  • the main body of the rotor is formed from a stack of laminations comprising a plurality of individual laminations arranged in a stack. This results in a simple manufacture of the rotor.
  • the receiving pockets are punched or cut, for example laser-cut, particularly before given.
  • each receiving pocket of the same pair of magnets has a first widening section adjoining in the radial direction within the longitudinal section, which first widening section extends away from the longitudinal section in a substantially U-shape. This results in a transition with as little mechanical stress as possible, with which at the same time as much material as possible is removed to reduce the inertia.
  • first widening sections of the two receiving pockets of the same pair of magnets extend away from one another in the circumferential direction relative to one another towards their end facing away from the longitudinal section.
  • each receiving pocket of the same pair of magnets has a second adjacent in the radial direction outside the longitudinal section Has widening section, which second widening section is positioned and running relative to a radial outer circumferential surface of the base body such that a web area remaining radially between the outer circumferential surface and the second widening section has a smaller width than the longitudinal section.
  • the magnets are displaced as far as possible in the radial direction towards the air gap formed between a stator and the rotor during operation.
  • this further magnet preferably forms a triangular arrangement with the magnets of the magnet pair, with each of the three magnets also forming one side of the triangle.
  • the further magnet is thus preferably arranged / aligned to run in the circumferential direction. This results in an even more powerful electric motor.
  • annular web extending continuously in the circumferential direction is arranged directly ra dial inside and / or outside the plurality of holes.
  • a magnetic pocket (on receiving pocket) of the rotor of a permanently excited synchronous motor with a triangular magnet arrangement is realized.
  • the magnetic pockets are specially shaped for optimized electromagnetic properties and for optimal structural rigidity of the rotor.
  • Fig. 1 is a front view of an electric motor according to the invention according to a first embodiment, wherein several receiving pockets introduced in a base body of the Ro tor and holes in shape and distribution can be clearly seen,
  • FIG. 2 shows a detailed representation of a circumferential section of the rotor of FIG. 1,
  • Fig. 3 is a front view of a rotor of an electric motor according to the invention according to a second embodiment, which differs from the first game arisesbei with regard to the Ausfor determination of the receiving pockets and holes, and
  • FIG. 4 shows a detailed illustration of a circumferential area of the rotor according to FIG. 3.
  • FIG. 1 the structure of an electric motor 1 according to the invention can be clearly seen on the basis of a first exemplary embodiment.
  • the electric motor 1 is implemented as a permanently excited synchronous machine.
  • a stator 20 fixed to the housing is indicated schematically in FIG. 1.
  • a permanently magnetized rotor 2 is arranged to be rotatable about an axis of rotation 21.
  • the electric motor 1 is preferably designed for use in a dedicated hybrid transmission.
  • an axial direction is a direction along the axis of rotation 21 (ie in FIG. 1 in the Plane in), a radial direction, a direction perpendicular to the axis of rotation 21 and a circumferential direction, a direction along a coaxially to the axis of rotation 21 extending circular line with a constant diameter.
  • the rotor 2 has a base body 3.
  • the base body 3 is in turn formed from a laminated core.
  • the base body 3 thus has a plurality of individual metal sheets 22 which are arranged axially stacked with respect to one another, one of these individual metal sheets 22 can be seen in FIG. 1 from the top view.
  • the individual sheets 22 are re alized as identical parts and therefore all of the same design.
  • the shape of the individual metal sheets 22 consequently corresponds to the shape of the base body 3 described below.
  • a plurality of magnets 6a, 6b and 7 designed as permanent magnets are accommodated in the base body 3. It can be seen that a group of three magnets 6a, 6b and 7, that is to say a first magnet 6a, a second magnet 6b and a third magnet 7, is provided several times in the circumferential direction. In this exemplary embodiment, eight of these groups are evenly distributed over the circumference.
  • the three magnets 6a, 6b and 7 belonging to a group describe a triangular shape with their arrangement. H. have a triangular arrangement. Accordingly, there are a first magnet 6a and a second magnet 6b for forming a pair of magnets 8, this pair of magnets 8 being a V-shaped arrangement 9.
  • the first magnet 6a is consequently aligned along a first leg of a V and the second magnet 6b along a second leg of the V.
  • the two first and second magnets 6a, 6b are also arranged mirror-symmetrically / mirror-inverted with respect to an exclusively radially extending reference plane 14.
  • the first magnet 6a and the second magnet 6b form a flat angle to one another.
  • the third magnet 7 is arranged in the circumferential direction centrally between the first magnet 6a and the second magnet 6b.
  • the third magnet 7 is aligned in the circumferential direction Rich.
  • the magnets 6a, 6b, 7 form a triangular shape pointing radially inward with their tip.
  • the two magnets 6a, 6b of the magnet pair 8 it can be seen that they are received by two essentially identically shaped receiving pockets 4a, 4b.
  • the first receiving pocket 4a and the second receiving pocket 4b have the shape that can be seen in the plane of the drawing according to FIG.
  • first receiving pocket 4a and the reception of the first magnet 6a in this first receiving pocket 4a will be described below, which, however, also apply to the second receiving pocket 4b and the reception of the second magnet 6b in this second receiving pocket 4b .
  • the first receiving pocket 4a has a substantially rectilinear longitudinal section 10 with a constant width.
  • the first magnet 6a rests directly on the sides of this longitudinal section 10 and is thereby fixed in the sense of a press bond.
  • the longitudinal section 10 closes with one radial end 11a each,
  • a first widened section 12 is that widened section which connects to a first end 11 a of the longitudinal section 10 pointing inward in the radial direction.
  • This first widening section 12 is implemented essentially U-shaped / sack-shaped when viewed in cross section / top view according to FIG. It can be seen that the first widened section 12, with its area directly adjoining the longitudinal section 10, has a greater width than the longitudinal section 10.
  • the first widened section 12 extends essentially U from the side of the first widened section 12 facing the longitudinal section 10 -shaped away. It can be seen that the first widening sections 12 of the two receiving pockets 4a, 4b of the same pair of magnets 8 extend away from one another in the circumferential direction towards their free end.
  • a second widened section 13 is that widened section which connects to a second end 11 b of the longitudinal section 10 pointing outward in the radial direction.
  • This second widening section 13 also has with his The region directly adjoining the longitudinal section 10 has a greater width than the longitudinal section 10.
  • the first magnet 6a has a length such that it also at least partially protrudes into the first and second widening sections 12, 13.
  • the second widened section 13 extends in the radial direction and in the circumferential direction away from the longitudinal section 10 in such a way that a web area 16 remains between a radial outer circumferential surface 15 of the base body 3 and the second widened section 13, which has a smaller width than the longitudinal section 10 / the first magnet 6a.
  • the respective receiving pocket 4a, 4b thus has an essentially phallus-shaped contour.
  • the third magnet 7 is arranged in a third receiving pocket 5 in the circumferential direction between the two receiving pockets 4a, 4b.
  • This third receiving pocket 5 has a substantially I-shaped contour and is aligned in the circumferential direction.
  • the third receiving pocket 5 preferably has a retaining lug 23 on each peripheral side of the third magnet 7, more preferably on a radial inner side, so that the third magnet 7 is fixed in the peripheral direction.
  • the base body 3 has a plurality of further holes 17a, 17b, 17c, 17d and 17e.
  • the holes 17a to 17d form a perforated ring structure 18 which runs continuously in the circumferential direction.
  • a continuously running (second) ring web 19b is arranged radially within this ring structure 18 and a continuously running (third) ring web 19c is arranged radially outside of this ring structure 18.
  • a first annular web 19a is adjacent to the outer jacket surface 15 and is thus implemented radially between the receiving pockets 4a, 4b, 5 and the outer jacket surface 15.
  • first and second holes 17a and 17b are essentially kidney-shaped or potato-shaped holes.
  • the holes 17a, 17b are Arranged in pairs and also form a substantially V-shaped arrangement.
  • a (fourth) hole 17d In the circumferential direction between these two holes 17a and 17b there is a (fourth) hole 17d which is configured somewhat smaller than the holes 17a, 17b.
  • a third hole 17c is positioned next to the first hole 17a in the circumferential direction and has a smaller shape than the fourth hole 17d.
  • the four holes 17a to 17d in turn form a group of holes that are lined up repeatedly in the circumferential direction to form the ring structure 18.
  • a fifth hole 17e is present in the radial direction at the level of the first widening sections 12 and in the circumferential direction essentially centrally between the first widening sections 12 of two adjacent magnet pairs 8.
  • This fifth hole 17e has a circular contour.
  • FIGS. 3 and 4 a further second exemplary embodiment is shown, which is constructed and functions essentially in accordance with the first exemplary embodiment. For the sake of brevity, therefore, only the differences from the first exemplary embodiment are described below.
  • the third magnet 7 has a smaller thickness / width than the two first and second magnets 6a, 6b. Accordingly, the third receiving pocket 5 is thinner / less wide than the two receiving pockets 4a, 4b implemented.
  • first and second widening sections 12, 13 are implemented somewhat smaller, but again increase the width of the longitudinal section 10.
  • the first holes 17a extend in the radial direction into a circumferential area between the receiving pockets 4a, 4b of two adjacent magnet pairs 8. This only results in two ring webs running continuously in the circumferential direction in the form of the first ring web 19a and the second ring web 19b.
  • the magnetic pockets 4a, 4b are designed phallus-shaped in order to meet both the electromagnetic and mechanical requirements.
  • Existing recesses 17a, 17b, 17c, 17d, 17e under the magnet pockets 4a, 4b are designed in such a way that both the requirements for the overlap between the rotor 2 and the shaft and for the inertia are met.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Abstract

L'invention concerne un moteur électrique (1) pour un véhicule automobile hybride ou purement électrique, comprenant un rotor à excitation permanente (2), le rotor (2) présentant un corps principal (3) et une pluralité d'aimants (6a, 6b, 7) qui sont reçus dans des poches de réception (4a, 4b, 5) du corps principal (3), et dans chaque cas, deux aimants (6a, 6b) qui forment une paire d'aimants (8) étant disposés selon un agencement sensiblement en forme de V (9) l'un avec l'autre, chaque poche de réception (4a, 4b) de la même paire d'aimants (8) présentant une section longitudinale (10) de largeur constante, qui maintient les aimants (6a, 6b), et présentant deux sections élargies (12, 13) qui sont adjacentes aux extrémités (11a, 11b) de la section longitudinale et qui sont conçues pour être plus larges que la section longitudinale (10) au moins dans des sections.
PCT/DE2021/100402 2020-06-09 2021-05-04 Moteur électrique à poches de réception permettant de recevoir des aimants WO2021249590A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020115286.8A DE102020115286A1 (de) 2020-06-09 2020-06-09 Elektromotor mit Aufnahmetaschen zur Aufnahme von Magneten
DE102020115286.8 2020-06-09

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Publication Number Publication Date
WO2021249590A1 true WO2021249590A1 (fr) 2021-12-16

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PCT/DE2021/100402 WO2021249590A1 (fr) 2020-06-09 2021-05-04 Moteur électrique à poches de réception permettant de recevoir des aimants

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WO (1) WO2021249590A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022125974A1 (de) 2022-10-07 2024-04-18 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Rotor einer Elektromaschine

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US6008559A (en) * 1997-07-22 1999-12-28 Matsushita Electric Industrial Co., Ltd. Motor using a rotor including an interior permanent magnet
US20120139382A1 (en) * 2010-12-06 2012-06-07 Toyota Jidosha Kabushiki Kaisha End plate, and rotor for rotary electric machine which employs the end plate
US20140225471A1 (en) * 2013-02-14 2014-08-14 Honda Motor Co., Ltd. Rotor for rotating electric machine
JP2015149791A (ja) * 2014-02-04 2015-08-20 トヨタ自動車株式会社 回転電機のロータ
US9231445B2 (en) * 2011-02-03 2016-01-05 Toyota Jidosha Kabushiki Kaisha Rotor for the electric machine
DE102014212871A1 (de) 2014-07-03 2016-01-07 Schaeffler Technologies AG & Co. KG Elektrische Maschine mit mechanischer Feldschwächung
DE102014214469A1 (de) * 2014-07-24 2016-01-28 Siemens Aktiengesellschaft Rotor für eine elektrische Maschine
CN108711977A (zh) * 2018-06-25 2018-10-26 苏州汇川联合动力系统有限公司 转子及永磁电机
CN109167449A (zh) * 2018-10-30 2019-01-08 上海元城汽车技术有限公司 电机转子冲片及永磁电机
WO2019081427A1 (fr) * 2017-10-26 2019-05-02 Compact Dynamics Gmbh Machine électrique avec puissance volumique augmentée
US20190273407A1 (en) * 2018-03-01 2019-09-05 Ford Global Technologies, Llc Rotor Assembly with Wedge-Shaped Magnet Pocket
US20200119607A1 (en) * 2018-10-10 2020-04-16 Honda Motor Co., Ltd. Rotor core
US20200119608A1 (en) * 2018-10-10 2020-04-16 Honda Motor Co., Ltd. Rotor
US20200127515A1 (en) * 2018-10-19 2020-04-23 Honda Motor Co., Ltd. Rotor

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JP5708181B2 (ja) 2010-05-12 2015-04-30 株式会社デンソー 回転電機のロータ
US9985484B2 (en) 2015-06-09 2018-05-29 Ford Global Technologies, Llc Surface groove patterns for permanent magnet machine rotors
DE102016115563A1 (de) 2015-08-24 2017-03-02 GM Global Technology Operations LLC Elektromaschine für hybrid-antriebsstrang mit zweispannungsnetzsystem
DE102017209247A1 (de) 2017-05-31 2018-12-06 Volkswagen Aktiengesellschaft Blechschnitt für einen Rotor einer elektrischen Maschine, Rotor für eine elektrische Maschine und elektrische Maschine mit Rotor
CN207074899U (zh) 2017-08-24 2018-03-06 长城汽车股份有限公司 转子铁芯
CN208316442U (zh) 2018-06-25 2019-01-01 苏州汇川联合动力系统有限公司 转子和永磁电机
CN208316443U (zh) 2018-06-25 2019-01-01 苏州汇川联合动力系统有限公司 转子及永磁电机
JP2020114129A (ja) 2019-01-15 2020-07-27 本田技研工業株式会社 回転電機のロータコア
CN210608727U (zh) 2019-09-27 2020-05-22 比亚迪股份有限公司 电机转子及电机

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6008559A (en) * 1997-07-22 1999-12-28 Matsushita Electric Industrial Co., Ltd. Motor using a rotor including an interior permanent magnet
US20120139382A1 (en) * 2010-12-06 2012-06-07 Toyota Jidosha Kabushiki Kaisha End plate, and rotor for rotary electric machine which employs the end plate
US9231445B2 (en) * 2011-02-03 2016-01-05 Toyota Jidosha Kabushiki Kaisha Rotor for the electric machine
US20140225471A1 (en) * 2013-02-14 2014-08-14 Honda Motor Co., Ltd. Rotor for rotating electric machine
JP2015149791A (ja) * 2014-02-04 2015-08-20 トヨタ自動車株式会社 回転電機のロータ
DE102014212871A1 (de) 2014-07-03 2016-01-07 Schaeffler Technologies AG & Co. KG Elektrische Maschine mit mechanischer Feldschwächung
DE102014214469A1 (de) * 2014-07-24 2016-01-28 Siemens Aktiengesellschaft Rotor für eine elektrische Maschine
WO2019081427A1 (fr) * 2017-10-26 2019-05-02 Compact Dynamics Gmbh Machine électrique avec puissance volumique augmentée
US20190273407A1 (en) * 2018-03-01 2019-09-05 Ford Global Technologies, Llc Rotor Assembly with Wedge-Shaped Magnet Pocket
CN108711977A (zh) * 2018-06-25 2018-10-26 苏州汇川联合动力系统有限公司 转子及永磁电机
US20200119607A1 (en) * 2018-10-10 2020-04-16 Honda Motor Co., Ltd. Rotor core
US20200119608A1 (en) * 2018-10-10 2020-04-16 Honda Motor Co., Ltd. Rotor
US20200127515A1 (en) * 2018-10-19 2020-04-23 Honda Motor Co., Ltd. Rotor
CN109167449A (zh) * 2018-10-30 2019-01-08 上海元城汽车技术有限公司 电机转子冲片及永磁电机

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