WO2015043799A2 - Système modulaire et procédé de fabrication d'un moteur électrique - Google Patents

Système modulaire et procédé de fabrication d'un moteur électrique Download PDF

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Publication number
WO2015043799A2
WO2015043799A2 PCT/EP2014/066169 EP2014066169W WO2015043799A2 WO 2015043799 A2 WO2015043799 A2 WO 2015043799A2 EP 2014066169 W EP2014066169 W EP 2014066169W WO 2015043799 A2 WO2015043799 A2 WO 2015043799A2
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
modular system
electric
electric machine
permanent magnets
Prior art date
Application number
PCT/EP2014/066169
Other languages
German (de)
English (en)
Other versions
WO2015043799A3 (fr
Inventor
Norbert Martin
Original Assignee
Robert Bosch Gmbh
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Priority to EP14744120.8A priority Critical patent/EP3050197A2/fr
Priority to CN201480052713.0A priority patent/CN105580252A/zh
Publication of WO2015043799A2 publication Critical patent/WO2015043799A2/fr
Publication of WO2015043799A3 publication Critical patent/WO2015043799A3/fr

Links

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
    • H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
    • H02K15/03—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies having permanent magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/12—Machines characterised by the modularity of some components

Definitions

  • the present invention relates to a modular system for forming at least a first electric machine and at least one second electric machine of different power and a method for producing an electric machine using such a modular system.
  • Battery powered, electrically powered two-wheeled vehicles are legally classified into various type classes that differ in the performance of the electric drive.
  • electrically powered two-wheeled vehicles of the type class L1 e may carry a maximum of up to 4 kW, while those of the type class L3e may have a maximum power of up to 1 1 kW.
  • Two-wheeled vehicles of the class L1 e are often operated with gearless wheel hub motors in the rear wheel. These are usually brushless, electrically commutated electric motors in a version as PMSM electric motors (with sinusoidal BACK EMF) or BLDC electric motors (with rectangular back EMF). With regard to their construction, these electric motors regularly have an axle-fixed stator with a high number of slots (regularly> 51), while the rotor is an integral part of the rim.
  • the rotor typically has a ring of rare earth permanent magnets mounted on an iron yoke ring (regularly ⁇ 46). The amount of rare earth magnets used is regularly approx.
  • a modular system for forming at least one first electric machine and at least one second electric machine of different power wherein the electric machines are designed as internal rotor with an external stator and an internal rotor having permanent magnets.
  • the stators for the electric machines are identical at least in terms of their inner diameter, while the rotor of the first electric machine has ferrite magnets and the rotor of the second electric machine has rare earth magnets.
  • the stators of the modular system can also be identical in terms of the geometry of the connection sites, via which the stators can be integrated into supporting structures, for example frames or rear-wheel swing of two-wheeled vehicles.
  • the stators of the modular system are completely identical or at least except their axial length completely identical.
  • the modular system makes it possible to design electric machines of different power without relevant changes to the basic topology and geometry of the stators and rotors used for this purpose.
  • a method for producing an electric machine using such a modular system thus provides that at least the rotor is selected based on the intended power of the electric machine.
  • Modular system for example, two electric machines can be provided, the stators are completely identical and their rotors differ only in the use of different permanent magnets.
  • two differently powerful electric machines can be realized in a simple manner. Since identical stators and with the exception of the permanent magnets used identical rotors is used, the investment in manufacturing facilities and possibly also storage costs compared to the already existing modular systems, in which the different benefits over an axial length scaling of stator and rotor is realized reduced become. In particular, these savings can be so high that additional costs incurred by the use of regularly comparatively expensive rare earths for the permanent magnets of an electric machine are overcompensated.
  • a particularly large and thus advantageous scaling of the power range which can be covered by the electrical machines of the modular system can be achieved by combining the power change based on the use of different types of permanent magnets with a power change via an axial scaling. Accordingly, a plurality of first electric machines and / or a plurality of second electric machines may be provided, which differ in their axial length and thus also have different powers.
  • two groups of electric machines differing in the type of permanent magnets used can be provided, with the electric machines of one or preferably both groups again differing in terms of their performance as a result of length scaling.
  • the power adjustment via the length scaling has the advantage of a fundamentally stepless and therefore arbitrary adaptation within the scope of the basic topology and geometry of the stator and rotor as well as by the respective
  • Type of permanent magnets used limited power ranges.
  • the additional production costs associated with the axial length scaling of the stators and rotors are comparatively low.
  • the integration of the length-scaled electrical machines into the intended environment for example a frame or a frame Rear swing arm of a two-wheeled vehicle, possible, without which would be associated with additional effort.
  • the factor with which the length scaling takes place in the axial direction for the first electric machines and / or second electric machines is between two and three.
  • the axial length of the longest electric machine of a group (first or second electric machines) is two to three times the axial length of the shortest electric machine of this group.
  • this factor range a length scaling of an otherwise (largely) unchanged electric machine with an acceptable difference in efficiency can be realized.
  • this horrnskal ists Kunststoff a meaningful transition can be achieved with respect to the covered by the two groups power ranges. For example, by means of the first, primarily serving as electric motors electric machines, a power range of approx.
  • a method for producing an electric machine using such a length-scalable modular system can provide that first the type of rotor resulting from the type of permanent magnets used and then a length of the stator and / or the rotor corresponding to the intended power of the electric machine are selected ,
  • the rotors of both electric machines have a spoke arrangement of their permanent magnets, wherein the preferably rod-shaped permanent magnets are aligned with a (preferably the largest) longitudinal extent radially relative to the respective axis of rotation of the rotor and the north pole south pole Connections of the permanent magnets perpendicular to the respective radial orientation. It may be particularly preferred that the polarity of adjacent permanent magnets is opposite.
  • Such a spoke arrangement of the permanent magnets can in particular have advantages in the case of a planned length scaling of the electric machines that can be produced from the two groups of the modular system.
  • the modular system is particularly suitable for the design of electric machines with an operating voltage range of ⁇ 60 V (DC). If the electric machines are provided as electric motors for driving vehicles, in particular two-wheeled vehicles, they can be designed or used in particular as cooled by a running wind.
  • FIG. 1 shows an electric motor formed from a modular system according to the invention
  • Figure 2 is a schematic cross-sectional view through the
  • Figures 1 and 2 show the structure of an electric motor, which is formed of a stator 1 and a rotor 2 of a modular system according to the invention.
  • the outer, annular stator 1 has twelve stator slots, which are formed between twelve stator teeth 3. In known manner coils (not shown) wound around the stator teeth 3 in single-tooth windings are arranged in the stator slots.
  • the rotor 2 has ten rod-shaped permanent magnets 4 in one
  • the permanent magnets 4 are in a so-called buried arrangement, i. these are arranged completely in depressions or pockets of a rotor base body 6 consisting of a return material. It may optionally be provided that in the radial direction on at least one side of the permanent magnets 4 between these and the return material air pockets are formed (not shown). As a result, magnetic leakage flux between adjacent permanent magnets 4 can be minimized.
  • the stator 1 according to FIG. 1 still has a housing 7.
  • This housing 7 is provided with connecting flanges 8, by means of which the electric motor can be connected to a supporting structure in order to support the torque generated thereby.
  • the connection flanges connection points in Have form of holes 9, which can be used for screwing with the supporting structure.
  • the electric motor is suitable as radnah arranged low-voltage drive motor for a battery-electrically powered two-wheeled vehicle, which may be combined with a transmission, in particular reduction gear that can connect directly to the electric motor.
  • the electric motor is also suitable as an attached to a vehicle frame of the two-wheeled vehicle drive motor, which may be formed in particular without or with integrated partial transmission.
  • the illustrated electric motor is suitable for driving a two-wheeled vehicle with a nominal power located within the legally prescribed homologation limits of 4 kW to 1 1 kW in the European Union.
  • the design of the electric motor with twelve stator slots and five pole pairs has a comparatively high winding factor of 94%. This leads to the intended use sufficiently low cogging torques.
  • a modular system is provided that provides various rotors 1 and stators 2 that can be combined with one another to obtain an electric motor of the required rated power.
  • the geometry and the topology (including the winding scheme) for all stators 1 (including the housing 7 and in particular the connection points) of the modular system with the (for at least some of the stators 1 applicable) exception of the axial (ie in the direction of Rotation axis 5 directed) length (in particular of the stator teeth 3 and the wound around these coils) is identical.
  • the rotors 2 of the modular system which are also identical in terms of their geometry and topology with the (for at least some of the rotors 2 applicable) exception of the axial length.
  • the rotors 2 are divided into two groups, which differ with respect to the type of permanent magnets 4 used. While in the first group permanent mag- te 4 made of a ferrite material (hereinafter “ferrite”) are used for the rotors of the second group permanent magnets 4 from a rare earth comprising material (hereinafter “rare earth magnets”), specifically Nd 2 Fei 4 B, provided.
  • ferrite a rare earth comprising material
  • an electric motor with ferrite magnets can be formed, which has an operating voltage of 50.5 V, an outer diameter of the stator of 120 mm, an outer diameter of the rotor of 65 mm and an axial packet length
  • a power of about 1 1 kW with a maximum torque of about 41, 2 Nm can be achieved. This corresponds to a power increase by a factor of 2.75 and a torque increase by a factor of about 2.73.
  • Both electric motors would also have approximately the same engine mass (about 7410 g), active mass (about 5630 g) and mass of copper used (about 1490 g). Only the masses of magnetic material used would be different, using 450 grams of ferrite material and 350 grams of rare earth material.
  • the smaller dimensions of the rare earth magnets also resulting from the lower mass of rare earth material used compared to the ferrite magnets can be compensated for by the use of a filling material, so that the total weight is the same for both electric motors.
  • a significant advantage of using the filling material is that the dimensions of the pockets of the rotor base body 6 can be identical for all rotors 2 present in the modular system. Accordingly, only one embodiment of the rotor base body 6 must be provided for the modular system.
  • a peculiarity of the geometry and topology of the electric motors which can be formed from the modular system is the pronounced salience, ie the pronounced difference of the virtual inductances L d and L q with respect to a rotor-fixed coordinate system the difference of the virtual
  • FIG. 3 shows a diagram which, by way of example, represents the course of the inductance L of the electric motor over the rotational speed n.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Abstract

Système modulaire permettant de former au moins un premier moteur électrique et au moins un second moteur électrique de puissances différentes. Les moteurs électriques se présentent sous la forme d'induits comportant un stator (1) situé à l'extérieur, et un rotor (2) situé à l'intérieur et pourvu d'aimants permanents (4). Ce système est caractérisé par des stators (1) qui sont identiques pour les moteurs électriques, au moins pour ce qui est de leur diamètre, tandis que le rotor (2) du premier moteur électrique comprend des aimants en ferrite et que le rotor (2) du second moteur électrique comprend au moins des aimants en terres rares.
PCT/EP2014/066169 2013-09-25 2014-07-28 Système modulaire et procédé de fabrication d'un moteur électrique WO2015043799A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP14744120.8A EP3050197A2 (fr) 2013-09-25 2014-07-28 Système modulaire et procédé de fabrication d'un moteur électrique
CN201480052713.0A CN105580252A (zh) 2013-09-25 2014-07-28 用于制造电机的组合件系统和方法

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201310219309 DE102013219309A1 (de) 2013-09-25 2013-09-25 Baukastensystem und Verfahren zur Herstellung einer Elektromaschine
DE102013219309.2 2013-09-25

Publications (2)

Publication Number Publication Date
WO2015043799A2 true WO2015043799A2 (fr) 2015-04-02
WO2015043799A3 WO2015043799A3 (fr) 2015-07-30

Family

ID=51225565

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/066169 WO2015043799A2 (fr) 2013-09-25 2014-07-28 Système modulaire et procédé de fabrication d'un moteur électrique

Country Status (4)

Country Link
EP (1) EP3050197A2 (fr)
CN (1) CN105580252A (fr)
DE (1) DE102013219309A1 (fr)
WO (1) WO2015043799A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3049783B1 (fr) * 2016-04-04 2021-10-01 Somfy Sas Actionneur electromecanique pour la commande d'ecrans, installation domotique comprenant un tel actionneur et gamme d'au moins deux tels actionneurs
EP4124876A1 (fr) 2021-07-26 2023-02-01 Koninklijke Philips N.V. Système d'imagerie par résonance magnétique générant un anti-bruit

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2451718C3 (de) * 1974-10-31 1979-09-20 Josef Dipl.-Phys. Dr. 8041 Fahrenzhausen Kemmer Elektrischer Antrieb mit radial und axial verschiebbarem Läufer
DE9109572U1 (de) * 1991-08-04 1991-10-24 Intus-Maschinen-GmbH, 7260 Calw Elektromotor in Mehrmotorenbauweise als Trommelmotor
CN1075835A (zh) * 1992-02-22 1993-09-01 北京市西城区新开通用试验厂 用于电机转子的稀土永磁体部件
JP3906882B2 (ja) * 1997-10-24 2007-04-18 株式会社富士通ゼネラル 永久磁石電動機
JP2003516708A (ja) * 1999-12-03 2003-05-13 エコエアー コーポレーション ハイブリッド式ブラシレス電気機械
JP2010068600A (ja) * 2008-09-09 2010-03-25 Mitsubishi Electric Corp 永久磁石型モータ及び密閉型圧縮機
JP2010246196A (ja) * 2009-04-02 2010-10-28 Hitachi Ltd 回転電機
CN201450422U (zh) * 2009-08-12 2010-05-05 西安合升动力科技有限公司 同体串联并行高速大功率永磁同步电机
DE102010029248A1 (de) * 2010-05-25 2011-12-01 Robert Bosch Gmbh Lenkantrieb für ein Kraftfahrzeug
JP5490171B2 (ja) * 2012-04-06 2014-05-14 三菱電機株式会社 回転子および同期電動機

Also Published As

Publication number Publication date
DE102013219309A1 (de) 2015-03-26
WO2015043799A3 (fr) 2015-07-30
EP3050197A2 (fr) 2016-08-03
CN105580252A (zh) 2016-05-11

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