FR2717961A1 - Starter motor with overheating protection for car engine - Google Patents
Starter motor with overheating protection for car engine Download PDFInfo
- Publication number
- FR2717961A1 FR2717961A1 FR9403520A FR9403520A FR2717961A1 FR 2717961 A1 FR2717961 A1 FR 2717961A1 FR 9403520 A FR9403520 A FR 9403520A FR 9403520 A FR9403520 A FR 9403520A FR 2717961 A1 FR2717961 A1 FR 2717961A1
- Authority
- FR
- France
- Prior art keywords
- electric
- motor
- switch
- starter
- heating element
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
- H02H7/0852—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load directly responsive to abnormal temperature by using a temperature sensor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/10—Safety devices
-
- 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
- H02K11/25—Devices for sensing temperature, or actuated thereby
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
Abstract
Description
La présente invention concerne une machine électrique équipée de moyens de protection contre la surchauffe. The present invention relates to an electric machine equipped with means of protection against overheating.
L'invention concerne plus particulièrement un moteur électrique équipé de moyens de protection contre sa surchauffe du type comportant au moins un interrupteur qui est agencé dans le circuit d'alimentation électrique du moteur et dont l'ouverture est commandée en fonction d'un paramètre représentatif de la température de la machine. The invention relates more particularly to an electric motor equipped with means of protection against overheating of the type comprising at least one switch which is arranged in the electric power supply circuit of the motor and the opening of which is controlled according to a representative parameter the temperature of the machine.
L'invention trouve notamment à s'appliquer à un démarreur de véhicule automobile dont il est nécessaire d'assurer la protection contre la surchauffe. The invention is particularly applicable to a motor vehicle starter which it is necessary to provide protection against overheating.
Afin de protéger le moteur du démarreur contre un échauffement excessif résultant d'une utilisation prolongée ou d'un fonctionnement anormal, et AFIN d'améliorer ses performances ainsi que sa fiabilité en évitant la destruction immédiate ou progressive de ses composants, il est connu de prévoir un dispositif de coupure, disposé en série dans le circuit électrique de commande du contacteur du démarreur, qui interrompt l'alimentation électrique de ce dernier lorsque la température du moteur dépasse une valeur prédéterminée. In order to protect the starter motor from excessive overheating resulting from prolonged use or abnormal operation, and IN order to improve its performance as well as its reliability by avoiding the immediate or progressive destruction of its components, it is known to provide a cut-off device, arranged in series in the electrical circuit for controlling the starter contactor, which interrupts the electrical supply to the starter when the engine temperature exceeds a predetermined value.
A cet effet, il a déjà été proposé de disposer un élément sensible à la température du moteur sur ce dernier, ou à l'intérieur de ce dernier le plus près possible d'une zone chaude et notamment du rotor. To this end, it has already been proposed to have an element sensitive to the temperature of the engine on the latter, or inside the latter as close as possible to a hot zone and in particular to the rotor.
Toutefois, l'agencement d'un tel composant formant capteur thermique à proximité du rotor, voire en contact avec l'arbre tournant de ce dernier, est peu aisé et il complique encore davantage la structure du moteur et notamment celle du porte-balais lorsque l'élément sensible à la température est porté par celui-ci. However, the arrangement of such a component forming a thermal sensor near the rotor, or even in contact with the rotary shaft of the latter, is not very easy and it further complicates the structure of the motor and in particular that of the brush holder when the temperature sensitive element is carried by it.
La présente invention a pour but de proposer une nouvelle conception des moyens de protection contre la surchauffe qui permettent de remédier aux inconvénients qui viennent d'être mentionnés. The object of the present invention is to propose a new design of the means of protection against overheating which make it possible to remedy the drawbacks which have just been mentioned.
Dans ce but, l'invention propose une machine électrique équipée de moyens de protection contre la surchauffe du type comportant au moins un interrupteur qui est agencé dans le circuit d'alimentation électrique de la machine et dont l'ouverture est commandée en fonction d'un paramètre représentatif de la température de la machine, les moyens de protection comportant un élément électrique chauffant alimenté par le circuit d'alimentation électrique et un capteur thermique associé à l'élément électrique chauffant et qui commande l'interrupteur, caractérisée en ce que l'élément chauffant est une résistance électrique réalisée sous la forme d'une plaque dont une des faces porte le capteur thermique. To this end, the invention provides an electrical machine equipped with means of protection against overheating of the type comprising at least one switch which is arranged in the electrical supply circuit of the machine and the opening of which is controlled as a function of a parameter representative of the temperature of the machine, the protection means comprising an electric heating element supplied by the electric supply circuit and a thermal sensor associated with the electric heating element and which controls the switch, characterized in that l The heating element is an electrical resistance produced in the form of a plate, one of the faces of which carries the thermal sensor.
Selon d'autres caractéristiques de l'invention
- la plaque comporte au moins une portion de section réduite
- le capteur thermique est agencé en regard de la portion de section réduite
- le capteur thermique et l'interrupteur appartiennent à un thermostat
- l'élément électrique chauffant est agencé en série dans le circuit d'alimentation de la machine.According to other features of the invention
- the plate has at least a portion of reduced section
- the thermal sensor is arranged opposite the reduced section portion
- the thermal sensor and the switch belong to a thermostat
- the electric heating element is arranged in series in the machine supply circuit.
L'invention propose également un démarreur de véhicule automobile du type comportant un moteur électri que et un contacteur, caractérisé en ce qu'il est réalisé conformément aux enseignements de l'invention et en ce que l'élément électrique chauffant est agencé dans le circuit d'alimentation électrique du moteur du démarreur. The invention also provides a motor vehicle starter of the type comprising an electric motor and a contactor, characterized in that it is produced in accordance with the teachings of the invention and in that the electric heating element is arranged in the circuit starter motor power supply.
Selon d'autres caractéristiques d'un démarreur selon l'invention
- l'interrupteur est agencé dans le circuit d'alimentation du contacteur
- l'élément électrique chauffant est interposé en série dans le conducteur d'alimentation électrique du moteur qui relie un balai au contacteur.According to other characteristics of a starter according to the invention
- the switch is arranged in the contactor supply circuit
- The electric heating element is interposed in series in the electric power supply conductor of the motor which connects a brush to the contactor.
D'autres caractéristiques et avantages de l'invention apparaîtront à la lecture de la description détaillée qui va suivre pour la compréhension de laquelle on se reportera aux dessins annexés dans lesquels
- La figure 1 est une vue schématique en perspective, partiellement éclatée, d'un démarreur de véhicule automobile équipé de moyens de protection contre la surchauffe conformes aux enseignements de l'invention
- la figure 2 est une vue schématique en perspective et à plus grande échelle de la conception selon l'état de la technique du conducteur reliant le contacteur à un balai d'alimentation du moteur du démarreur
- la figure 3 est une figure similaire à celle de la figure 2 illustrant la réalisation selon l'invention du conducteur d'alimention du moteur du démarreur ; et
- la figure 4 est un schéma illustrant le circuit d'alimentation électrique du démarreur illustré sur la figure 1. Other characteristics and advantages of the invention will appear on reading the detailed description which follows for the understanding of which reference will be made to the accompanying drawings in which
- Figure 1 is a schematic perspective view, partially exploded, of a motor vehicle starter equipped with means of protection against overheating according to the teachings of the invention
- Figure 2 is a schematic perspective view on a larger scale of the design according to the state of the art of the driver connecting the contactor to a brush for supplying the starter motor
- Figure 3 is a figure similar to that of Figure 2 illustrating the embodiment according to the invention of the supply conductor of the starter motor; and
- Figure 4 is a diagram illustrating the electrical supply circuit of the starter illustrated in Figure 1.
Le démarreur 10 illustré sur la figure 1 est composé pour l'essentiel d'un moteur électrique 12 qui, lorsqu'il est alimenté en courant, permet d'entraîner en rotation le lanceur (non représenté) du démarreur, et d'un contacteur 14. The starter 10 illustrated in FIG. 1 is essentially composed of an electric motor 12 which, when supplied with current, makes it possible to rotate the starter launcher (not shown), and a contactor 14.
Selon une conception connue, le contacteur 14 a pour fonction d'établir ou d'interrompre l'alimentation en courant électrique du moteur 12 et il consiste en un interrupteur comportant un élément mobile 16 (voir figure 4) dont les déplacements sont commandés par un actionneur électromagnétique et qui établit ou qui interrompt le passage du courant dans un conducteur 18 relié à l'un des balais 20 porté par le porte-balais 22 du moteur électrique 12. According to a known design, the contactor 14 has the function of establishing or interrupting the supply of electric current to the motor 12 and it consists of a switch comprising a movable element 16 (see FIG. 4) whose movements are controlled by a electromagnetic actuator and which establishes or which interrupts the flow of current in a conductor 18 connected to one of the brushes 20 carried by the brush holder 22 of the electric motor 12.
Comme on peut le voir sur la figure 4, lorsque le conducteur établit le contact au moyen de l'interrupteur 24 commandé par la clef de contact, il provoque l'alimentation de la bobine 26 de l'actionneur électromagnétique qui provoque la fermeture de l'interrupteur 16 interne au contacteur 14 qui établit l'alimentation du moteur 12 à travers le conducteur 18. As can be seen in FIG. 4, when the driver establishes contact by means of the switch 24 controlled by the ignition key, it causes the coil 26 of the electromagnetic actuator to be energized, which causes the closing of the switch 16 internal to the contactor 14 which establishes the supply of the motor 12 through the conductor 18.
Le moteur 12 du démarreur 10 est équipé de moyens 28 de protection contre la surchauffe qui comportent un élément électrique chauffant 30 et un interrupteur 32 dont l'ouverture est commandée en fonction de la température de l'élément électrique chauffant 30. The motor 12 of the starter 10 is equipped with means 28 for protection against overheating which include an electric heating element 30 and a switch 32, the opening of which is controlled as a function of the temperature of the electric heating element 30.
Comme on peut le voir aux figures 2 et 3, l'élément électrique chauffant 30 est interposé dans le conducteur 18 en lieu et place d'un fil conducteur 34 qui relie la patte de raccordement électrique 36 portée par la borne de sortie 38 du contacteur 14 au balai ou charbon 20. As can be seen in Figures 2 and 3, the electric heating element 30 is interposed in the conductor 18 in place of a conductive wire 34 which connects the electrical connection lug 36 carried by the output terminal 38 of the contactor 14 with broom or carbon 20.
L'élément électrique chauffant 30 est une résistance électrique agencée en série dans le circuit d'alimentation du moteur et il est de préférence, conformément aux enseignements de l'invention, réalisé sous la forme d'une plaque dont une première extrémité 40 est fixée à la patte de raccordement 36 et dont la seconde extrémité 42 est reliée à une barrette 44, par exemple par soudage, cette dernière étant elle-même reliée au balai 20 par un fil conducteur 46. The electric heating element 30 is an electrical resistor arranged in series in the motor supply circuit and it is preferably, in accordance with the teachings of the invention, produced in the form of a plate of which a first end 40 is fixed to the connection lug 36 and the second end 42 of which is connected to a strip 44, for example by welding, the latter itself being connected to the brush 20 by a conductive wire 46.
On conçoit donc que l'élément électrique chauffant 30 qui fournit un signal représentatif du courant circulant dans le conducteur d'alimentation 18 peut être intégré à un démarreur selon l'état de la technique sans modifier en aucune manière la conception globale de ce dernier. It is therefore understandable that the electric heating element 30 which provides a signal representative of the current flowing in the supply conductor 18 can be integrated into a starter according to the state of the art without in any way modifying the overall design of the latter.
La résistance électrique constituée par la plaque 30 est donc traversée par le courant d'alimentation et elle s'échauffe en fonction de l'intensité de ce courant. The electrical resistance constituted by the plate 30 is therefore crossed by the supply current and it heats up as a function of the intensity of this current.
La plaque chauffante 30 produit donc un échauffement qui est représentatif de la température de fonctionnement du moteur 12, cette dernière étant directement liée à la valeur de l'intensité de son courant d'alimentation. The heating plate 30 therefore produces a heating which is representative of the operating temperature of the motor 12, the latter being directly linked to the value of the intensity of its supply current.
La structure et le choix du matériau constitutif de la plaque électrique chauffante doivent permettre d'aboutir à un compromis entre sa résistance électrique minimale, afin de ne pas perturber l'alimentation électrique du moteur 12, et sa capacité optimale d'échauffement. The structure and the choice of the material of the electric heating plate must allow a compromise to be reached between its minimum electrical resistance, so as not to disturb the electrical supply to the motor 12, and its optimal heating capacity.
A cet effet, la plaque 30 comporte une série de portions 48 de section réduite qui constituent autant de points chauds de la plaque 30 lorsqu'elle est traversée par le courant d'alimentation. To this end, the plate 30 comprises a series of portions 48 of reduced section which constitute as many hot spots of the plate 30 when it is traversed by the supply current.
Dans le mode de réalisation selon l'invention, le capteur thermique de mesure directe ou indirecte de l'échauffement de la plaque 30 est intégré dans un thermostat 50 dont l'interrupteur 52 est, comme on peut le voir sur la figure 4, interposé dans le circuit d'alimentation électrique des bobines 26 du contacteur 14. In the embodiment according to the invention, the thermal sensor for direct or indirect measurement of the heating of the plate 30 is integrated in a thermostat 50 whose switch 52 is, as can be seen in FIG. 4, interposed in the electrical supply circuit of the coils 26 of the contactor 14.
Lorsque le moteur 12 fonctionne en surcharge, ou lorsque son utilisation est anormalement prolongée, la plaque 30 s'échauffe et provoque l'ouverture de l'interrupteur 52 du thermostat 50 qui interrompt l'alimentation électrique du contacteur 14 et provoque donc l'ouverture de l'interrupteur 16 de ce dernier qui provoque l'arrêt de l'alimentation du moteur électrique 12. When the motor 12 operates in overload, or when its use is abnormally prolonged, the plate 30 heats up and causes the opening of the switch 52 of the thermostat 50 which interrupts the electrical supply of the contactor 14 and therefore causes the opening of the switch 16 of the latter which causes the supply of the electric motor 12 to stop.
Dans le cas de l'utilisation d'un thermostat 50, le démarreur 10 ne peut plus être utilisé tant que la température de la plaque chauffante 30 n'est pas redescendue en-dessous d'une valeur prédéterminée correspondant au seuil inférieur de température du thermostat 50. In the case of the use of a thermostat 50, the starter 10 can no longer be used as long as the temperature of the heating plate 30 has not dropped below a predetermined value corresponding to the lower temperature threshold of the thermostat 50.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9403520A FR2717961B1 (en) | 1994-03-25 | 1994-03-25 | Electric machine and motor vehicle starter comprising means for protection against overheating. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9403520A FR2717961B1 (en) | 1994-03-25 | 1994-03-25 | Electric machine and motor vehicle starter comprising means for protection against overheating. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2717961A1 true FR2717961A1 (en) | 1995-09-29 |
| FR2717961B1 FR2717961B1 (en) | 1996-05-15 |
Family
ID=9461427
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR9403520A Expired - Fee Related FR2717961B1 (en) | 1994-03-25 | 1994-03-25 | Electric machine and motor vehicle starter comprising means for protection against overheating. |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2717961B1 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0771947A1 (en) * | 1995-10-31 | 1997-05-07 | Nippondenso Co., Ltd. | Starter with overheat protection |
| WO2001024339A1 (en) * | 1999-09-29 | 2001-04-05 | Robert Bosch Gmbh | Electric stator device for an internal combustion engine |
| EP1092867A2 (en) * | 1999-10-15 | 2001-04-18 | Robert Bosch Gmbh | Electrical starter for an internal combustion engine with a protection device |
| US6452295B1 (en) * | 1999-01-26 | 2002-09-17 | Mitsubishi Denki Kabushiki Kaisha | Engine starter with a thermostat for thermal protection |
| FR2853940A1 (en) * | 2003-04-18 | 2004-10-22 | Denso Corp | STARTER FOR AN INTERNAL COMBUSTION ENGINE |
| FR3006127A1 (en) * | 2013-05-22 | 2014-11-28 | Valeo Equip Electr Moteur | ROTATING ELECTRIC MACHINE COMPRISING A THERMAL PROTECTION MODULE |
| CN106089536A (en) * | 2015-04-30 | 2016-11-09 | 罗伯特·博世有限公司 | Launcher for internal combustion engine |
| WO2016207547A1 (en) * | 2015-06-26 | 2016-12-29 | Valeo Equipements Electriques Moteur | Motor vehicle starter having a thermal protection system |
| DE102015224278A1 (en) * | 2015-12-04 | 2017-06-08 | Robert Bosch Gmbh | Electromagnetic relay, in particular starter relay for a starting device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1911110U (en) * | 1964-11-17 | 1965-03-04 | Stotz Kontakt Gmbh | EXTERNAL HEATED BIMETAL RELAY, ESPECIALLY IN STRIP SHAPE. |
| FR2117946A1 (en) * | 1970-12-09 | 1972-07-28 | Bbc Brown Boveri & Cie | |
| GB2068661A (en) * | 1980-01-23 | 1981-08-12 | Bosch Gmbh Robert | Switching mechanism for an electrical starting device for an internal combustion engine |
| FR2568066A1 (en) * | 1984-07-17 | 1986-01-24 | Paris & Du Rhone | Protection against overheating for electric starter with motor with permanent magnets |
-
1994
- 1994-03-25 FR FR9403520A patent/FR2717961B1/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1911110U (en) * | 1964-11-17 | 1965-03-04 | Stotz Kontakt Gmbh | EXTERNAL HEATED BIMETAL RELAY, ESPECIALLY IN STRIP SHAPE. |
| FR2117946A1 (en) * | 1970-12-09 | 1972-07-28 | Bbc Brown Boveri & Cie | |
| GB2068661A (en) * | 1980-01-23 | 1981-08-12 | Bosch Gmbh Robert | Switching mechanism for an electrical starting device for an internal combustion engine |
| FR2568066A1 (en) * | 1984-07-17 | 1986-01-24 | Paris & Du Rhone | Protection against overheating for electric starter with motor with permanent magnets |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0771947A1 (en) * | 1995-10-31 | 1997-05-07 | Nippondenso Co., Ltd. | Starter with overheat protection |
| US6452295B1 (en) * | 1999-01-26 | 2002-09-17 | Mitsubishi Denki Kabushiki Kaisha | Engine starter with a thermostat for thermal protection |
| US6668781B1 (en) | 1999-09-20 | 2003-12-30 | Robert Bosch Gmbh | Electric starter device for an internal combustion engine |
| WO2001024339A1 (en) * | 1999-09-29 | 2001-04-05 | Robert Bosch Gmbh | Electric stator device for an internal combustion engine |
| EP1092867A2 (en) * | 1999-10-15 | 2001-04-18 | Robert Bosch Gmbh | Electrical starter for an internal combustion engine with a protection device |
| EP1092867A3 (en) * | 1999-10-15 | 2002-07-31 | Robert Bosch Gmbh | Electrical starter for an internal combustion engine with a protection device |
| FR2853940A1 (en) * | 2003-04-18 | 2004-10-22 | Denso Corp | STARTER FOR AN INTERNAL COMBUSTION ENGINE |
| FR3006127A1 (en) * | 2013-05-22 | 2014-11-28 | Valeo Equip Electr Moteur | ROTATING ELECTRIC MACHINE COMPRISING A THERMAL PROTECTION MODULE |
| CN106089536A (en) * | 2015-04-30 | 2016-11-09 | 罗伯特·博世有限公司 | Launcher for internal combustion engine |
| CN106089536B (en) * | 2015-04-30 | 2020-06-12 | 索恩格汽车德国有限责任公司 | Starting device for internal combustion engine |
| WO2016207547A1 (en) * | 2015-06-26 | 2016-12-29 | Valeo Equipements Electriques Moteur | Motor vehicle starter having a thermal protection system |
| FR3038159A1 (en) * | 2015-06-26 | 2016-12-30 | Valeo Equip Electr Moteur | MOTOR VEHICLE STARTER PROVIDED WITH A THERMAL PROTECTION SYSTEM |
| US10541589B2 (en) | 2015-06-26 | 2020-01-21 | Valeo Equipements Electriques Moteur | Motor vehicle starter equipped with a thermal protection system |
| DE102015224278A1 (en) * | 2015-12-04 | 2017-06-08 | Robert Bosch Gmbh | Electromagnetic relay, in particular starter relay for a starting device |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2717961B1 (en) | 1996-05-15 |
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|---|---|---|---|
| ST | Notification of lapse |