WO2018029217A1 - Unité de machine électrique dotée d'un dispositif de bague collectrice exposé à un flux d'air - Google Patents

Unité de machine électrique dotée d'un dispositif de bague collectrice exposé à un flux d'air Download PDF

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Publication number
WO2018029217A1
WO2018029217A1 PCT/EP2017/070117 EP2017070117W WO2018029217A1 WO 2018029217 A1 WO2018029217 A1 WO 2018029217A1 EP 2017070117 W EP2017070117 W EP 2017070117W WO 2018029217 A1 WO2018029217 A1 WO 2018029217A1
Authority
WO
WIPO (PCT)
Prior art keywords
fan
slip ring
electrical machine
machine unit
rotor
Prior art date
Application number
PCT/EP2017/070117
Other languages
German (de)
English (en)
Inventor
Bernd Schroeder
Peter Lang
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
Publication of WO2018029217A1 publication Critical patent/WO2018029217A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/28—Cooling of commutators, slip-rings or brushes e.g. by ventilating
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/30—Structural association with control circuits or drive circuits
    • H02K11/33—Drive circuits, e.g. power electronics
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/14—Means for supporting or protecting brushes or brush holders
    • H02K5/141—Means for supporting or protecting brushes or brush holders for cooperation with slip-rings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
    • H02K5/1732—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotary shaft at both ends of the rotor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
    • H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H02K11/21—Devices for sensing speed or position, or actuated thereby
    • H02K11/215—Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements

Definitions

  • the present invention relates to an electrical machine unit comprising an electric machine with a slip ring arrangement, wherein the slip ring arrangement is at least partially exposed to an air flow generated by a fan.
  • Electric machine units comprising an electric machine and power electronics mounted thereon are e.g. in motor vehicles as starters or generators or combined as starter generators or so-called boost recuperation machines (BRM) are used. They may, for example, a foreign-excited electric machine with rotor winding (exciter winding) and stator winding and power electronics downstream of the stator winding power converter with regulator (eg generator controller or field controller) having the voltage generated by the electric machine or the torque generated by the electric machine regulates.
  • regulator eg generator controller or field controller
  • the slip ring arrangement can comprise a carbon loop ring system in which sliding contacts designed as carbon brushes run on slip rings connected to the rotor and transmit the exciting current from or onto the rotating rotor.
  • sliding contacts designed as carbon brushes run on slip rings connected to the rotor and transmit the exciting current from or onto the rotating rotor.
  • the invention proposes an electrical machine unit comprising an electric machine with a stator, a rotor and a slip ring arrangement and a fan driven by the rotor, wherein the electrical machine unit is designed such that the slip ring arrangement is at least partially disposed in an intake path of the fan.
  • the slip ring assembly is located on the negative pressure side of the fan.
  • the invention has the advantage that the slip ring assembly is detected during operation of the fan of the sucked air flow and thus cooled by the sucked air flow. As a result, an undesired increase in temperature of the slip ring assembly during operation of the electric machine can be reduced or avoided altogether. This has the advantageous effect that increased by the operation of the electrical machine at elevated temperatures increased wear of the slip ring assembly can be reduced or even avoided altogether.
  • the invention offers the advantage that the durability or service life of particularly wear-prone carbon brushes, which are often used as sliding contacts, can be increased because unwanted temperature increases can be reduced or even avoided.
  • the longevity of conventional slip ring assemblies can be increased without requiring higher costs for slip ring assemblies of more expensive materials.
  • the fan is on a B-side, i. on the side facing away from the drive, arranged.
  • electric motors on the B side already have a fan for cooling the rotor and / or stator, which according to this preferred embodiment is now used simultaneously for cooling the slip ring arrangement.
  • the rotor and stator are on the overpressure side and the slip ring assembly on the negative pressure side of the fan.
  • the fan is rotatably connected to the rotor. This is a particularly simple and robust embodiment.
  • the electrical machine comprises a housing unit, wherein the housing unit at least partially covers the fan and at least partially einhaust the slip ring assembly.
  • the housing unit may be formed as a connection plate, which may serve to grow or connect an optionally existing power electronics to the electric machine.
  • the housings may be integrally formed, such as made of a cast or milled and / or stamped from one piece.
  • the housing unit may be formed in several pieces.
  • the housing unit may comprise a connection plate and a bearing plate, which may form the housing unit when assembled.
  • the housing unit may consist in particular of plastic and / or metal.
  • the housing unit has at least one air guide element on a part covering the fan and has at least one opening on a part housing the slip ring arrangement.
  • the air guide element may be formed as a nose and / or lamella, which is adapted to deflect the air flow at least partially in a desired direction.
  • the air guide element and the opening are arranged such that the air flow sucked by the fan flows at least partially over the slip ring arrangement.
  • the housing unit may on the one hand be designed to cover the fan at least partially and to einhausen the slip ring assembly, and on the other serve to at least partially deflect a sucked air flow of the fan, so that this at least partially flows through the slip ring assembly.
  • the at least one air guide element and / or the at least one opening at least partially form an air channel, wherein the air channel is designed to direct the air flow at least partially.
  • the housing unit is arranged on a side of the fan facing away from the stator.
  • the fan may be adjacent to the rotor on one side and covered on the other side by the housing unit.
  • the electrical machine unit further comprises a rotary encoder, which is at least partially disposed in the suction path of the fan. In electrical machines often a rotary encoder or its permanent magnet is mounted on the rotor shaft. The magnetic field of the permanent magnet rotating with the rotor is detected and used to determine the angular position of the rotor.
  • the cooling of the rotary encoder or in particular its permanent magnet is advantageous because the permanent magnet is demagnetized at high temperatures.
  • this avoids the technical disadvantage that, at elevated or high temperatures of the permanent magnet, its magnetic field becomes weaker, as a result of which rotor-bearing detection would become more difficult or less precise.
  • a rotor position detection and thus a motorized operation of the electric machine would not be possible at too high temperatures of the permanent magnet under certain circumstances.
  • the invention has the advantageous effect that an increase in the Angle error and thereby a reduction in the efficiency of the electric machine can be avoided in an efficient manner.
  • the electrical machine unit further comprises a power electronics, which is at least partially disposed in the intake of the fan.
  • the power electronics is thus at least partially exposed to the air flow sucked by the fan.
  • the sensor of the rotary encoder can be part of this power electronics.
  • the power electronics on a heat sink which is at least partially exposed to the air flow generated by the fan.
  • the fan is disposed between the stator and slip ring assembly, and the fan and slip ring assembly are disposed between the stator and the attached power electronics. This results in a particularly compact arrangement with good cooling effect.
  • FIG. 1 shows a schematic representation of an electrical machine unit according to a preferred embodiment in an external view.
  • Figure 2 shows the electrical machine unit according to the preferred embodiment of Figure 1 in a longitudinal sectional view.
  • FIG. 3 shows an enlarged view of the region marked by the dashed line in FIG.
  • FIG. 4A shows a perspective view of a first side of a connection plate according to a preferred embodiment.
  • Figure 4B shows in a perspective view of a second side of the
  • Terminal plate according to a preferred embodiment of Figure 4A.
  • FIG. 5 shows a perspective illustration of an enclosure unit according to a preferred embodiment.
  • Figure 6 shows a schematic representation of the course of an air flow according to a preferred embodiment.
  • Figure 7 shows a schematic representation of the course of an air flow according to another preferred embodiment.
  • Figure 8 shows a schematic representation of the course of an air flow according to another preferred embodiment.
  • FIG. 9 shows a schematic representation of the course of an air flow according to a further preferred embodiment.
  • the electrical machine unit 10 which, for example, in a boost Recuperation system can be used, it includes an electric machine 12 and a housing unit, which has a connection plate 14 and a protective cap 15. Further, the electrical machine unit 10 includes power electronics 16, which is grown on the connection plate 14 to the electric machine 12 and seen covered by the protective cap 15. In addition, brush holder 18 of the electric machine can be seen in the illustration shown.
  • FIG 2 shows the electrical machine unit 10 according to the preferred embodiment of Figure 1 in a longitudinal sectional view.
  • the electric machine 12 comprises a rotor 20 and a stator or stator 22. Furthermore, the electric machine 12 on the stator 22 has a lamella pact 24 which is fixed between two bearing plates 38.
  • the end shields 38 also accommodate ball bearings 26 in which the rotor 20 is rotatably mounted with a rotor shaft 20a.
  • the rotor 20 is formed with claw poles 20b and a rotor winding 20c. The energization of the rotor winding 20c via a slip ring assembly 30th
  • Sliding contacts or carbon brushes of the brush holder 18 and a slip ring assembly 28 are formed as part of the slip ring assembly 30.
  • Sliding contacts slide on copper slip rings of slip ring assembly 28 which is fixedly connected to rotor 20 and adapted to rotate with rotor 20.
  • a respective fan 32 is arranged and in each case attached to the rotor 20.
  • the fans 32 are designed to co-rotate with the rotor 20 and thereby generate the necessary air flow for cooling the rotor 20 and the rotor winding 20c and the stator 22.
  • a rotary encoder 34 is mounted on the rotor shaft 20 a, which a
  • the rotary encoder 34 has, for example, a permanent magnet 34b attached to the rotor shaft 22a (see FIG. 3) and a sensor system, which may be part of the power electronics 16.
  • the magnet rotating with the rotor 20 The field of the permanent magnet 34b can be detected by the sensor and can thus serve to determine the angular position of the rotor 20.
  • the stator windings 22a of the stator 22 is energized in dependence on the angular position of the rotor 20.
  • a mechanical power is converted into an electrical power to supply, for example, the electrical system of a motor vehicle with electric power.
  • an electric power is converted into a mechanical power, for example to provide an additional torque for accelerating the vehicle (boosting).
  • the transmission of the mechanical power can be done for example via a pulley 36 which is fixedly connected to the rotor shaft 20a.
  • connection plate 14 which covers one of the fan 32 and connects the phases of the stator 22 with the power electronics 16. Furthermore, the connecting plate 14 serves to receive a portion of the slip ring assembly 30, in particular the brush holder 18. The connecting plate 14 encloses by means of a wall 14a, the slip ring assembly 28 of the slip ring assembly 30 and the rotary encoder 34 and thus protects these components from penetrating media and dirt.
  • FIG. 3 shows an enlarged view of the region marked by dashed line 900 in FIG.
  • Figure 3 shows an enlarged view of the grinding space, i. a portion of the slip ring assembly 30.
  • the slip ring assembly 28 includes two slip rings 28a and a plastic extrusion 28b.
  • the slip rings 28a are each electrically connected to bus bars 28c, with the other end of the bus bars 28c being connected to cable ends of the rotor winding 20c.
  • slip ring assembly 28 includes two sliding contacts 28d, which are slidably mounted in the brush holder 18, so that these on the slip rings 28a slide, wherein the slip rings 28a lead or transmit the electrical excitation current.
  • the rotary encoder 34 comprises an electrically non-conductive housing 34 a, the permanent magnet 34 b and a retaining pin 34 c, via which the rotary encoder
  • FIGS. 4A and 4B show in a perspective view of a first
  • connection plate 14 spans the slip ring space 14b by means of the wall 14a, which is designed to at least partially enclose the slip ring arrangement 30 or the slip ring assembly 28. Furthermore, the connection plate 14 comprises an air guide element 14c, which is designed to at least partially guide the air flow sucked in by the right-hand fan 32 (that is, on the B side of the electric machine 12) through the slip ring space 14b.
  • Figure 5 shows a perspective view of the housing unit, which according to the embodiment shown, the connection plate 14 and the bearing plate 38 has.
  • the air guide element 14c cooperates with the bearing plate 38 in such a way that an air channel 14d is formed which is able to guide the air flow at least partially through the slip ring space 14b in a particularly efficient manner.
  • the slip ring assembly 30 which is located according to the embodiments shown on the negative pressure side of the fan 32, or in the air intake, are particularly efficiently exposed to the sucked by the fan 32 airflow.
  • the slip ring assembly 30 at least partially, in particular the special heat-sensitive sliding contacts 28d and / or slip rings 28a, are effectively cooled in a simple manner, without the need for another, separate fan and / or heat sink must be provided.
  • Figure 6 shows a schematic representation of the course of an air flow according to a preferred embodiment.
  • the dashed line or the dashed arrow 910 indicates the direction of the air flow according to a preferred embodiment. Since the slip ring assembly 30 is located on the vacuum side or in the intake of the fan 32, the air flow passes through the slip ring assembly 30 in the direction of the fan 32. The air is sucked in the side and flows initially substantially perpendicular to the rotor shaft 20a inward. There, the air flow enters through an opening between the wall 14a and the rotary encoder 34 in the slip ring space 14b and flows parallel to the rotor shaft 20a through the slip ring space 14b in the direction of the fan 32 therethrough.
  • the air flow on the slip rings 28a and / or on the sliding contacts 28d and / or on other components of the slip ring assembly 30 heat absorbed and dissipate.
  • the air flow 910 is then drawn through the air guide element 14c and the air duct 14d in the direction of the fan.
  • the electrical machine unit 10 is designed such that the air over the
  • Figure 7 shows a schematic representation of the course of an air flow according to another preferred embodiment.
  • the course of the air flow is shown by the arrow 920.
  • the air flow is not sucked through an opening between the wall 14a and the rotary encoder 34.
  • the electrical machine unit has a separate suction element 40 with openings 40a through which the air flow can flow.
  • the suction member 40 may have holes as openings 40a for the air flow.
  • FIG. 8 shows a schematic representation of the course of an air flow 920 according to a further preferred embodiment.
  • the air stream sucked via a suction element 40 similar to the embodiment of Figure 7.
  • the suction element 40 is integrally formed with a heat sink of the power electronics 16 and formed on this.
  • FIG. 9 shows a schematic representation of the course of an air flow 920 according to a further preferred embodiment.
  • the air flow via a suction element 40, which is molded onto the heat sink of the power electronics 16, sucked similar to the embodiment of Figure 8.
  • the air guide component can be integrally formed at the other end to the connection plate 14, wherein a gap between the intake element 40 and the connection plate 14 can be used as an opening 40a to the air inlet.
  • the joint or parting line can be designed in the manner of a labyrinth to make it difficult to penetrate dirt.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Motor Or Generator Cooling System (AREA)

Abstract

L'invention concerne une unité de machine électrique (10) comportant une machine électrique (12) dotée d'un stator (22), d'un rotor (20) avec un dispositif de bague collectrice (30), et d'un ventilateur (32) entraîné par le rotor (20). L'unité de machine électrique (10) est conçue de manière que le dispositif de bague collectrice (30) est disposé au moins en partie dans un chemin d'aspiration du ventilateur (32).
PCT/EP2017/070117 2016-08-12 2017-08-08 Unité de machine électrique dotée d'un dispositif de bague collectrice exposé à un flux d'air WO2018029217A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016215089.8 2016-08-12
DE102016215089.8A DE102016215089A1 (de) 2016-08-12 2016-08-12 Elektrische Maschineneinheit mit einer einem Luftstrom ausgesetzten Schleifringanordnung

Publications (1)

Publication Number Publication Date
WO2018029217A1 true WO2018029217A1 (fr) 2018-02-15

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ID=59683527

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PCT/EP2017/070117 WO2018029217A1 (fr) 2016-08-12 2017-08-08 Unité de machine électrique dotée d'un dispositif de bague collectrice exposé à un flux d'air

Country Status (3)

Country Link
DE (1) DE102016215089A1 (fr)
FR (1) FR3055073B1 (fr)
WO (1) WO2018029217A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110739806A (zh) * 2018-07-19 2020-01-31 Seg汽车德国有限公司 电的机器

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3079366B1 (fr) * 2018-03-21 2021-01-15 Valeo Systemes Thermiques Ensemble module de commande de vitesse d'un moteur de groupe moto-ventilateur et support balai d'un moteur de groupe moto-ventilateur
JP7186843B1 (ja) * 2021-10-13 2022-12-09 三菱電機株式会社 回転電機

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS602051A (ja) * 1983-06-16 1985-01-08 Nippon Denso Co Ltd 車両用交流発電機
US5424600A (en) * 1991-11-06 1995-06-13 Nippondenso Co., Ltd. Spark protected alternator
US6294856B1 (en) * 1998-11-02 2001-09-25 Denso Corporation Feeder arrangement of vehicle AC generator
US20070023421A1 (en) * 2005-07-26 2007-02-01 Mitsubishi Denki Kabushiki Kaisha Inverter-intergrated electrical rotating machine
US20070052319A1 (en) * 2005-09-08 2007-03-08 Mitsubishi Electric Corporation Automotive dynamoelectric machine
FR2896634A1 (fr) * 2006-01-25 2007-07-27 Mitsubishi Electric Corp Machine dynamoelectrique a dispositif de commande integre.
WO2009095119A2 (fr) * 2008-01-31 2009-08-06 Robert Bosch Gmbh Machine électrique, en particulier machine triphasée à rotor à bagues collectrices
EP2319162A1 (fr) * 2008-08-28 2011-05-11 Robert Bosch GmbH Machine électrique
DE102012110928A1 (de) * 2011-11-17 2013-05-23 Denso Corporation Wechselstromgenerator für Fahrzeuge
FR2986676A1 (fr) * 2012-02-03 2013-08-09 Bosch Gmbh Robert Machine electrique, notamment pour le dispositif d'entrainement d'un vehicule automobile
DE102012206898A1 (de) * 2012-04-26 2013-10-31 Robert Bosch Gmbh Elektrische Maschine
DE102013226543A1 (de) * 2013-12-18 2015-06-18 Robert Bosch Gmbh Elektrische Maschine
DE102014225228A1 (de) * 2014-12-09 2016-06-09 Robert Bosch Gmbh Elektrische Maschine mit einer Potentialausgleichsvorrichtung
WO2016098977A1 (fr) * 2014-12-16 2016-06-23 Lg Electronics Inc. Machine électrique rotative

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS602051A (ja) * 1983-06-16 1985-01-08 Nippon Denso Co Ltd 車両用交流発電機
US5424600A (en) * 1991-11-06 1995-06-13 Nippondenso Co., Ltd. Spark protected alternator
US6294856B1 (en) * 1998-11-02 2001-09-25 Denso Corporation Feeder arrangement of vehicle AC generator
US20070023421A1 (en) * 2005-07-26 2007-02-01 Mitsubishi Denki Kabushiki Kaisha Inverter-intergrated electrical rotating machine
US20070052319A1 (en) * 2005-09-08 2007-03-08 Mitsubishi Electric Corporation Automotive dynamoelectric machine
FR2896634A1 (fr) * 2006-01-25 2007-07-27 Mitsubishi Electric Corp Machine dynamoelectrique a dispositif de commande integre.
WO2009095119A2 (fr) * 2008-01-31 2009-08-06 Robert Bosch Gmbh Machine électrique, en particulier machine triphasée à rotor à bagues collectrices
EP2319162A1 (fr) * 2008-08-28 2011-05-11 Robert Bosch GmbH Machine électrique
DE102012110928A1 (de) * 2011-11-17 2013-05-23 Denso Corporation Wechselstromgenerator für Fahrzeuge
FR2986676A1 (fr) * 2012-02-03 2013-08-09 Bosch Gmbh Robert Machine electrique, notamment pour le dispositif d'entrainement d'un vehicule automobile
DE102012206898A1 (de) * 2012-04-26 2013-10-31 Robert Bosch Gmbh Elektrische Maschine
DE102013226543A1 (de) * 2013-12-18 2015-06-18 Robert Bosch Gmbh Elektrische Maschine
DE102014225228A1 (de) * 2014-12-09 2016-06-09 Robert Bosch Gmbh Elektrische Maschine mit einer Potentialausgleichsvorrichtung
WO2016098977A1 (fr) * 2014-12-16 2016-06-23 Lg Electronics Inc. Machine électrique rotative

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110739806A (zh) * 2018-07-19 2020-01-31 Seg汽车德国有限公司 电的机器

Also Published As

Publication number Publication date
FR3055073A1 (fr) 2018-02-16
FR3055073B1 (fr) 2020-06-19
DE102016215089A1 (de) 2018-02-15

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