DE102010064385A1 - Electrical machine e.g. three-phase alternator, for converting mechanical energy into electrical energy of motor vehicle, has heat sink comprising apertures for cooling air within switching element in relation to rotational axis - Google Patents
Electrical machine e.g. three-phase alternator, for converting mechanical energy into electrical energy of motor vehicle, has heat sink comprising apertures for cooling air within switching element in relation to rotational axis Download PDFInfo
- Publication number
- DE102010064385A1 DE102010064385A1 DE102010064385A DE102010064385A DE102010064385A1 DE 102010064385 A1 DE102010064385 A1 DE 102010064385A1 DE 102010064385 A DE102010064385 A DE 102010064385A DE 102010064385 A DE102010064385 A DE 102010064385A DE 102010064385 A1 DE102010064385 A1 DE 102010064385A1
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- Germany
- Prior art keywords
- heat sink
- switching element
- cooling air
- rectifier
- electrical
- 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.)
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Classifications
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- 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
- H02K11/04—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for rectification
- H02K11/049—Rectifiers associated with stationary parts, e.g. stator cores
- H02K11/05—Rectifiers associated with casings, enclosures or brackets
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Synchronous Machinery (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
Description
Stand der TechnikState of the art
Generatoren zur Umwandlung mechanischer Energie in elektrische Energie im Kraftfahrzeug sind bekannt. Meist werden dazu Klauenpolgeneratoren verwendet. Dem Stand der Technik entsprechend sind diese meist mit elektrischer Erregung ausgestattet. Klauenpolgeneratoren erzeugen meist dreiphasigen Drehstrom, so dass für die Speisung einer Bordnetzbatterie eine Gleichrichtung erforderlich ist. Stand der Technik sind Gleichrichter auf Basis von Halbleiterdioden. Darüber hinaus ist aus der
Bei den bekannten Generatoren mit Diodengleichrichter ist der Wirkungsgrad nachteiligIn the known generators with diode rectifier, the efficiency is disadvantageous
Durch Einsatz der Synchrongleichrichtung kann der Wirkungsgrad gegenüber dem Diodengleichrichter nennenswert gesteigert werden, da die eingesetzten Schaltelemente einen geringeren Spannungsabfall in Vorwärtsrichtung aufweisen als Dioden.By using the synchronous rectification, the efficiency compared to the diode rectifier can be increased significantly, since the switching elements used have a lower voltage drop in the forward direction than diodes.
Nachteile der bekannten Synchrongleichrichter sind bspw., dass sich aufgrund der notwendigen Ansteuerung verglichen mit dem Diodengleichrichter ein höherer elektrischer Schaltungsaufwand ergibt. Zudem müssen MOSFETs und die Ansteuerschaltung gegen Umwelteinflüsse wie Spritzwasser, Fremdkörper etc. geschützt werden, wodurch sich die Wärmeabgabe an die Umgebung verschlechtert.Disadvantages of the known synchronous rectifier are, for example, that due to the necessary control compared to the diode rectifier results in a higher electrical circuit complexity. In addition, MOSFETs and the drive circuit must be protected against environmental influences such as spray water, foreign objects, etc., whereby the heat dissipation to the environment deteriorates.
Die maximal mögliche Betriebstemperatur von MOSFETs ist deutlich geringer als die von Dioden. Bei sehr hoher Belastung des Generators, insbesondere in Verbindung mit hohen Umgebungstemperaturen, können die Schalter des Synchrongleichrichters geschädigt werden.The maximum possible operating temperature of MOSFETs is significantly lower than that of diodes. At very high load of the generator, especially in conjunction with high ambient temperatures, the switches of the synchronous rectifier can be damaged.
Da Generatoren zunehmend auch sicherheitsrelevante Systeme versorgen, hier sei auf elektrische Lenkunterstützung hingewiesen, kommt der Verfügbarkeit des Generators eine zunehmend wichtige Rolle zu.Since generators increasingly supply safety-relevant systems as well, mention should be made of electrical steering assistance, the availability of the generator is playing an increasingly important role.
Offenbarung der ErfindungDisclosure of the invention
Ziel der Erfindung ist es, ein Kühlkonzept für einen synchronen Gleichrichter zur Verfügung zu stellen, das eine ausreichende Wärmeabfuhr in allen Arbeitsbereichen gewährleistet, wobei gleichzeitig die Strömungswiderstände des Kühlluftstroms auf ein Minimum reduziert werden sollen.The aim of the invention is to provide a cooling concept for a synchronous rectifier, which ensures sufficient heat dissipation in all work areas, at the same time the flow resistance of the cooling air flow to be reduced to a minimum.
Gegenüber dem Diodengleichrichter hat der Synchrongleichrichter einen deutlich höheren Wirkungsgrad. Eine optimale Kühlung gewährleistet eine hohe Ausfallsicherheit des Gleichrichters. Aufgrund der geringeren Strömungswiderstände kann die notwendige Lüftergröße verringert werden, was zu einer Reduzierung der Geräuschemissionen führt.Compared to the diode rectifier, the synchronous rectifier has a much higher efficiency. Optimum cooling ensures high reliability of the rectifier. Due to the lower flow resistance, the necessary fan size can be reduced, resulting in a reduction of noise emissions.
Bei dem vorgeschlagenen Konzept müssen kaum Änderungen an der elektrischen Maschine vorgenommen werden, wodurch sich der Synchrongleichrichter mit geringem Aufwand in bestehende Generatorsysteme integrieren lässt.In the proposed concept hardly changes to the electric machine must be made, whereby the synchronous rectifier can be integrated with little effort into existing generator systems.
Der Kühlkörper ist kostengünstig als Strangpressteil herstellbar.The heat sink is inexpensive to produce as an extruded part.
Da auf der Oberseite der Gleichrichter-Baugruppe keine Kühlrippen vorgesehen sind, verringert sich die Baugröße der Maschine in Achsrichtung.Since no cooling fins are provided on the top of the rectifier assembly, the size of the machine in the axial direction is reduced.
Unter bestimmten Randbedingungen kann bei diesem Konzept die Schutzkappe weggelassen werden, da die Strömungsrichtung bereits durch die Kühlkörpergeometrie vorgegeben wird. Under certain conditions, the protective cap can be omitted in this concept, since the flow direction is already determined by the heat sink geometry.
Kurze Beschreibungen der ZeichnungenShort descriptions of the drawings
Die Erfindung wird im Folgenden beispielhaft anhand von Figuren näher erläutert:The invention is explained in more detail below by way of example with reference to figures:
Es zeigenShow it
Gleiche Bezugszahlen bezeichnen gleiche Teile.Like reference numerals designate like parts.
Ausführungsformen der ErfindungEmbodiments of the invention
In
Der Rotor
Die in
Die Gleichrichter-Baugruppe
Auf der Unterseite der Basisplatte
Wenn sich der Rotor
Die Schaltelemente sind in einem gemeinsamen Kunststoffgehäuse angeordnet, das sich in einer Ebene senkrecht zur Maschinenachse erstreckt, die durch die Schaltelemente erzeugte Wärme durch eine Anzahl von Kühlkörpern abgeführt wird, die senkrecht zu den Schaltelementen angeordnet sind, so dass sie in axialer Richtung von Luft durchströmt werden. Die Kühlluftkanäle sind ausschließlich im Innendurchmesser des Gleichrichters angeordnet, um eine möglichst große nutzbare Fläche für den Gleichrichter zu erhalten.The switching elements are arranged in a common plastic housing, which extends in a plane perpendicular to the machine axis, the heat generated by the switching elements is dissipated by a number of heat sinks, which are arranged perpendicular to the switching elements, so that it flows through in the axial direction of air become. The cooling air channels are arranged exclusively in the inner diameter of the rectifier in order to obtain the largest possible usable area for the rectifier.
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- DE 10312110 [0001] DE 10312110 [0001]
- EP 604503 B1 [0007] EP 604503 B1 [0007]
- DE 102004007395 A1 [0008] DE 102004007395 A1 [0008]
- DE 102005059244 A1 [0009] DE 102005059244 A1 [0009]
- US 20070023421 A1 [0010] US 20070023421 A1 [0010]
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010064385A DE102010064385A1 (en) | 2010-12-30 | 2010-12-30 | Electrical machine e.g. three-phase alternator, for converting mechanical energy into electrical energy of motor vehicle, has heat sink comprising apertures for cooling air within switching element in relation to rotational axis |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102010064385A DE102010064385A1 (en) | 2010-12-30 | 2010-12-30 | Electrical machine e.g. three-phase alternator, for converting mechanical energy into electrical energy of motor vehicle, has heat sink comprising apertures for cooling air within switching element in relation to rotational axis |
Publications (1)
Publication Number | Publication Date |
---|---|
DE102010064385A1 true DE102010064385A1 (en) | 2012-07-05 |
Family
ID=46509253
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE102010064385A Withdrawn DE102010064385A1 (en) | 2010-12-30 | 2010-12-30 | Electrical machine e.g. three-phase alternator, for converting mechanical energy into electrical energy of motor vehicle, has heat sink comprising apertures for cooling air within switching element in relation to rotational axis |
Country Status (1)
Country | Link |
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DE (1) | DE102010064385A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018138448A1 (en) * | 2017-01-27 | 2018-08-02 | Valeo Equipements Electriques Moteur | Rotary electric machine provided with a shutter limiting loopback of hot air |
DE102020200100A1 (en) | 2020-01-08 | 2021-08-05 | Robert Bosch Gesellschaft mit beschränkter Haftung | CONTROLLED RECTIFIER AND METHOD FOR OPERATING A MOTOR-INTEGRATED RECTIFIER |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0604503B1 (en) | 1991-09-20 | 1995-05-03 | Robert Bosch Gmbh | Cooling system for electric motors |
DE10312110A1 (en) | 2003-03-19 | 2004-09-30 | Robert Bosch Gmbh | Rectifier bridge circuit for motor vehicle alternator, has controllable switches with parallel-connected diodes in positive and negative half-bridge circuits |
DE102004007395A1 (en) | 2003-02-18 | 2005-01-20 | Denso Corp., Kariya | Motor-generator for motor vehicle, has insulating filler in mounting space for components, between heat-absorbing baseplate and peripheral wall |
DE102005059244A1 (en) | 2004-12-13 | 2006-06-14 | Mitsubishi Denki K.K. | Self-rotating electrical machine for use in motor vehicle, includes heat dissipation device with cooling bodies, where switching devices are distributed and attached on cooling bodies |
US20070023421A1 (en) | 2005-07-26 | 2007-02-01 | Mitsubishi Denki Kabushiki Kaisha | Inverter-intergrated electrical rotating machine |
-
2010
- 2010-12-30 DE DE102010064385A patent/DE102010064385A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0604503B1 (en) | 1991-09-20 | 1995-05-03 | Robert Bosch Gmbh | Cooling system for electric motors |
DE102004007395A1 (en) | 2003-02-18 | 2005-01-20 | Denso Corp., Kariya | Motor-generator for motor vehicle, has insulating filler in mounting space for components, between heat-absorbing baseplate and peripheral wall |
DE10312110A1 (en) | 2003-03-19 | 2004-09-30 | Robert Bosch Gmbh | Rectifier bridge circuit for motor vehicle alternator, has controllable switches with parallel-connected diodes in positive and negative half-bridge circuits |
DE102005059244A1 (en) | 2004-12-13 | 2006-06-14 | Mitsubishi Denki K.K. | Self-rotating electrical machine for use in motor vehicle, includes heat dissipation device with cooling bodies, where switching devices are distributed and attached on cooling bodies |
US20070023421A1 (en) | 2005-07-26 | 2007-02-01 | Mitsubishi Denki Kabushiki Kaisha | Inverter-intergrated electrical rotating machine |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2018138448A1 (en) * | 2017-01-27 | 2018-08-02 | Valeo Equipements Electriques Moteur | Rotary electric machine provided with a shutter limiting loopback of hot air |
FR3062531A1 (en) * | 2017-01-27 | 2018-08-03 | Valeo Equipements Electriques Moteur | ROTATING ELECTRIC MACHINE WITH SHUTTER LIMITING HOT AIR REBOUCLING |
CN110192333A (en) * | 2017-01-27 | 2019-08-30 | 法雷奥电机设备公司 | The rotating electric machine of the baffle of restricted hot-air loopback is set |
CN110192333B (en) * | 2017-01-27 | 2021-09-28 | 法雷奥电机设备公司 | Rotary electric machine with baffle plate for limiting hot air loop |
DE102020200100A1 (en) | 2020-01-08 | 2021-08-05 | Robert Bosch Gesellschaft mit beschränkter Haftung | CONTROLLED RECTIFIER AND METHOD FOR OPERATING A MOTOR-INTEGRATED RECTIFIER |
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R012 | Request for examination validly filed | ||
R079 | Amendment of ipc main class |
Free format text: PREVIOUS MAIN CLASS: H02K0009060000 Ipc: H02K0009220000 |
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R081 | Change of applicant/patentee |
Owner name: SEG AUTOMOTIVE GERMANY GMBH, DE Free format text: FORMER OWNER: ROBERT BOSCH GMBH, 70469 STUTTGART, DE Owner name: ROBERT BOSCH GMBH, DE Free format text: FORMER OWNER: ROBERT BOSCH GMBH, 70469 STUTTGART, DE |
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R082 | Change of representative |
Representative=s name: DEHNSGERMANY PARTNERSCHAFT VON PATENTANWAELTEN, DE |
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R120 | Application withdrawn or ip right abandoned |