FR2794303A1 - Rectification circuit for a vehicle alternator output, utilizes Graetz bridging circuit in conjunction with varistors at the extremities of the Graetz Bridge and switching units to control the rectifier operation - Google Patents
Rectification circuit for a vehicle alternator output, utilizes Graetz bridging circuit in conjunction with varistors at the extremities of the Graetz Bridge and switching units to control the rectifier operation Download PDFInfo
- Publication number
- FR2794303A1 FR2794303A1 FR9906972A FR9906972A FR2794303A1 FR 2794303 A1 FR2794303 A1 FR 2794303A1 FR 9906972 A FR9906972 A FR 9906972A FR 9906972 A FR9906972 A FR 9906972A FR 2794303 A1 FR2794303 A1 FR 2794303A1
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- FR
- France
- Prior art keywords
- graetz
- switches
- diode
- bridge
- circuit
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M7/219—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only in a bridge configuration
-
- 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
Abstract
Description
<B><U>PERFECTIONNEMENTS AUX PONTS</U></B><U> REDRESSEURS<B>A</B></U> <U>INTERRUPTEURS<B>COMMANDES, NOTAMMENT</B> POUR ALTERNATEUR</U> <B><U>DE</U></B> VEHICULE <B><U>AUTOMOBILE.</U></B> <B> <U> IMPROVEMENTS TO BRIDGES </ U> </ B> <U> RECTIFIERS <B> A </ U> </ U> <U> SWITCHES <B> CONTROLS, INCLUDING </ B> FOR ALTERNATOR < / U> <B> <U> DE </ U> </ B> VEHICLE <B> <U> AUTOMOBILE. </ U> </ B>
La présente invention est relative aux ponts redresseurs<B>à</B> interrupteurs commandés, notamment pour alternateurs de véhicules automobiles. The present invention relates to rectifier bridges <B> to </ B> controlled switches, in particular for alternators of motor vehicles.
On utilise classiquement en sortie des alternateurs de véhicule automobile des ponts de Graetz triphasés constitués de six diodes. Classically used motor vehicle alternators are used three-phase Graetz bridges consisting of six diodes.
Les diodes des ponts redresseurs de ce type font souvent l'objet d'un échauffement important. The diodes of the rectifier bridges of this type are often subject to significant heating.
Pour pallier cet inconvénient, il a<B>déjà</B> été proposé des ponts redresseurs constitués de six interrupteurs qui sont commandés de façon synchrone, en fonction de mesures sur l'intensité du courant qui circule dans les branches. To overcome this drawback, it has already been proposed rectifier bridges consisting of six switches that are controlled synchronously, according to measurements on the intensity of the current flowing in the branches.
Ces interrupteurs commandés sont généralement des transistors de type MOSFET. These controlled switches are generally MOSFET type transistors.
Toutefois, les ponts de Graetz <B>à</B> interrupteurs sont d'une commande délicate. However, Graetz's bridges to switches are of delicate order.
En particulier, la commande synchrone des six interrupteurs s'avère difficile car les mesures de courant sur les branches du pont sont perturbées par les fermetures des interrupteurs qui engendrent des fronts de commutation raides. In particular, the synchronous control of the six switches proves difficult because the current measurements on the branches of the bridge are disturbed by the closures of the switches which generate steep switching edges.
<B>Il</B> en résulte des pertes de rendement, ainsi qu'un risque que deux transistors d'une même branche soient fermés simultanément, auquel cas la batterie du véhicule se trouve en court-circuit. <B> It </ B> results in yield losses, as well as a risk that two transistors of the same branch are closed simultaneously, in which case the battery of the vehicle is in short circuit.
Un but de l'invention est de proposer un pont redresseur<B>à</B> interrupteurs commandés qui ne présente pas ces inconvénients. An object of the invention is to provide a bridge rectifier <B> to </ B> controlled switches that does not have these disadvantages.
La solution selon l'invention est un montage redresseur<B>à</B> pont de Graetz, caractérisé en ce que ses branches qui sont montées entre ses deux extrémités de sortie comportent chacune un élément formant diode monté entre l'une de ces extrémités et l'entrée de phase et un élément formant interrupteur commandé monté entre ladite entrée de phase et l'autre extrémité. The solution according to the invention is a rectifier mounting <B> to </ B> Graetz bridge, characterized in that its branches which are mounted between its two output ends each comprise a diode element mounted between one of these ends and the phase input and a controlled switch element mounted between said phase input and the other end.
En particulier, selon un mode de réalisation avantageux, les diodes sont montées entre l'extrémité de sortie dite négative et les entrées de phase, les interrupteurs commandés étant montés entre lesdites entrées de phase et l'extrémité de sortie dite positive. In particular, according to an advantageous embodiment, the diodes are mounted between the so-called negative output end and the phase inputs, the controlled switches being mounted between said phase inputs and the so-called positive output end.
Avantageusement, le montage comporte des moyens pour commander les interrupteurs en fonction de l'état de la diode de leur branche. Advantageously, the assembly comprises means for controlling the switches according to the state of the diode of their branch.
En particulier, ces moyens comportent avantageusement des moyens pour commander les interrupteurs en fonction de l'intensité du courant traversant la diode de leur branche. In particular, these means advantageously comprise means for controlling the switches as a function of the intensity of the current flowing through the diode of their branch.
En variante, ils comportent des moyens pour commander les interrupteurs en fonction de la tension entre les extrémités de la diode de leur branche. In a variant, they comprise means for controlling the switches as a function of the voltage between the ends of the diode of their branch.
L'invention concerne également un alternateur de véhicule automobile, caractérisé en ce qu'il comporte un montage redresseur du type précité. The invention also relates to an alternator of a motor vehicle, characterized in that it comprises a rectifier assembly of the aforementioned type.
Elle concerne en outre une machine électrique apte<B>à</B> fonctionner alternativement comme moteur de démarreur ou comme alternateur, caractérisée en ce qu'elle comporte un montage du type précité. It also relates to an electric machine adapted to operate alternately as a starter motor or as an alternator, characterized in that it comprises a mounting of the aforementioned type.
D'autres caractéristiques et avantages de l'invention ressortiront encore de la description qui suit qui est purement illustrative et non limitative. Cette description doit être lue en regard de la figure unique annexée sur laquelle on a représenté un montage conforme<B>à</B> un mode de réalisation possible de l'invention. Other characteristics and advantages of the invention will emerge from the following description which is purely illustrative and not limiting. This description should be read with reference to the single appended figure on which a fitting according to a possible embodiment of the invention is shown.
Le pont redresseur représenté sur la figure unique est un pont de Graetz qui comporte trois diodes<B>Dl, D2</B> et<B>D3,</B> ainsi que trois interrupteurs commandés<B>Il,</B> 12 et<B>13.</B> The rectifier bridge shown in the single figure is a Graetz bridge which has three diodes <B> D1, D2 </ B> and <B> D3, </ B> as well as three controlled switches <B> II, </ B > 12 and <B> 13. </ B>
Les trois entrées de phase de ce pont de Graetz ont été référencées par (pl, (p2 et (p3. Les extrémités du pont qui constituent la borne positive et la borne négative entre lesquelles le pont délivre une tension de sortie redressée ont été référencées par 13- et 13+. The three phase inputs of this Graetz bridge have been referenced by (pl, (p2 and (p3.) The bridge ends which constitute the positive terminal and the negative terminal between which the bridge delivers a rectified output voltage have been referenced by 13- and 13+.
Les diodes<B>Dl à D3</B> sont par exemple des diodes Zener ou des diodes haute tension. The diodes <B> D1 to D3 </ B> are, for example, Zener diodes or high voltage diodes.
L'anode de la diode<B>Dl</B> est reliée<B>à</B> la borne B-, tandis que sa cathode est reliée<B>à</B> l'entrée de phase (pl. The anode of the diode <B> D1 </ B> is connected <B> to </ B> the terminal B-, while its cathode is connected <B> to </ B> the phase input (pl .
L'anode de la diode<B>D2</B> est reliée<B>à</B> la borne B-, tandis que sa cathode est reliée<B>à</B> l'entrée de phase (p2. The anode of the diode <B> D2 </ B> is connected <B> to the terminal B-, while its cathode is connected <B> to the </ B> phase input (p2 .
L'anode de la diode<B>D3</B> est reliée<B>à</B> la borne 13-, tandis que sa cathode est reliée<B>à</B> l'entrée de phase (p3. The anode of diode <B> D3 </ B> is connected <B> to </ B> terminal 13-, while its cathode is connected <B> to </ B> the phase input (p3 .
Les interrupteurs<B>11,</B> 12 et<B>13</B> sont des transistors de type MOSFET. L'interrupteur<B>Il</B> est monté entre la cathode de la diode<B>Dl</B> et la borne 13+. Switches 11, 12 and 13 are MOSFET transistors. The <B> Il </ B> switch is mounted between the cathode of the <B> Dl </ B> diode and the 13+ terminal.
L'interrupteur 12 est quant<B>à</B> lui monté entre la cathode de la diode <B>D2</B> et la borne 13+. The switch 12 is connected to it between the cathode of the diode <B> D2 </ B> and the terminal 13+.
L'interrupteur<B>13</B> est quant<B>à</B> lui monté entre la cathode de la diode <B>D2</B> et la borne 13+. The switch <B> 13 </ B> is connected to it between the cathode of the diode <B> D2 </ B> and the terminal 13+.
Une unité de gestion<B>U</B> commande les grilles Gl <B>à G3</B> de ces différents transistors<B>Il à 13.</B> A management unit <B> U </ B> controls the grids G1 <B> to G3 </ B> of these different transistors <B> II to 13. </ B>
Cette unité de gestion<B>U</B> est par exemple un circuit intégré qui génère la tension de commande injectée sur une grille GI <B>à G3</B> d'un transistor<B>Il à 13</B> en fonction d'une détection de l'état (passant ou bloqué) dans lequel se trouve la diode<B>Dl à D3</B> de la branche sur laquelle se trouve ledit transistor<B>Il à 13.</B> This management unit <B> U </ B> is for example an integrated circuit which generates the control voltage injected on a gate GI <B> to G3 </ B> of a transistor <B> Il to 13 </ B> according to a detection of the state (passing or blocked) in which is the diode <B> Dl to D3 </ B> of the branch on which is located said transistor <B> Il to 13. < / B>
Cette détection se fait par exemple par mesure de la tension aux bornes de ladite diode<B>Dl à D3.</B> This detection is done for example by measuring the voltage across said diode <B> D1 to D3. </ B>
En variante, elle peut être effectuée par mesure, au moyen d'une dérivation de type shunt, de l'intensité de courant traversant ladite diode<B>Dl</B> <B>à D3.</B> Alternatively, it can be performed by measuring, by means of a shunt shunt, the current flowing through said diode <B> D1 </ B> <B> to D3. </ B>
On notera que le fait que les interrupteurs<B>Il à 13</B> soient disposés dans le pont de Graetz <B>à</B> la place des diodes positives présente l'intérêt de contribuer fortement<B>à</B> un moindre échauffement du montage redresseur, dans la mesure où les diodes positives sont généralement celles qui sur un pont de Graetz sont les plus dures<B>à</B> refroidir. It should be noted that the fact that switches <B> 11 to 13 </ B> are arranged in the Graetz bridge <B> to </ B> instead of the positive diodes has the advantage of contributing strongly <B> to < Less heating of the rectifier circuit, since the positive diodes are generally those which on a Graetz bridge are the hardest to cool.
Le montage qui vient d'être décrit présente un meilleur rendement que les montages<B>à</B> pont de Graetz <B>à</B> interrupteurs commandés connus dans l'état de la technique. The assembly which has just been described has a better performance than the assemblies <B> to </ B> bridge Graetz <B> to </ B> controlled switches known in the state of the art.
<B>Il</B> présente également un échauffement moins important que les montages<B>à</B> ponts de Graetz <B>à</B> diodes. <B> It </ B> also has a lower heating than Graetz Bits <B> to </ B> diodes.
Comme on l'aura compris, un tel montage est avantageusement utilisé comme pont redresseur d'alternateur de véhicule automobile ou de machines électriques "alterno-démarreurs", c'est<B>à</B> dire aptes<B>à</B> fonctionner alternativement comme moteur de démarreur ou comme alternateur.As will have been understood, such a mounting is advantageously used as a rectifier bridge of a motor vehicle alternator or electrical machines "alternator-starters", it is <B> to </ B> say apt <B> to < / B> alternately operate as a starter motor or as an alternator.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9906972A FR2794303B1 (en) | 1999-05-31 | 1999-05-31 | IMPROVEMENTS ON BRIDGE RECTIFIERS WITH CONTROLLED SWITCHES, IN PARTICULAR FOR A MOTOR VEHICLE ALTERNATOR |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9906972A FR2794303B1 (en) | 1999-05-31 | 1999-05-31 | IMPROVEMENTS ON BRIDGE RECTIFIERS WITH CONTROLLED SWITCHES, IN PARTICULAR FOR A MOTOR VEHICLE ALTERNATOR |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2794303A1 true FR2794303A1 (en) | 2000-12-01 |
| FR2794303B1 FR2794303B1 (en) | 2001-08-17 |
Family
ID=9546296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR9906972A Expired - Lifetime FR2794303B1 (en) | 1999-05-31 | 1999-05-31 | IMPROVEMENTS ON BRIDGE RECTIFIERS WITH CONTROLLED SWITCHES, IN PARTICULAR FOR A MOTOR VEHICLE ALTERNATOR |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2794303B1 (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0052860A2 (en) * | 1980-11-26 | 1982-06-02 | Deutsche ITT Industries GmbH | Monolithic integrated semiconductor bridge circuit |
| US4777580A (en) * | 1985-01-30 | 1988-10-11 | Maxim Integrated Products | Integrated full-wave rectifier circuit |
| US5510972A (en) * | 1994-06-29 | 1996-04-23 | Philips Electronics North America Corporation | Bridge rectifier circuit having active switches and an active control circuit |
| GB2301240A (en) * | 1995-05-25 | 1996-11-27 | Smiths Industries Plc | Rectifier circuit |
| US5694311A (en) * | 1995-03-31 | 1997-12-02 | Nippondenso Co., Ltd. | Power supply system |
| US5780996A (en) * | 1995-06-23 | 1998-07-14 | Nippondenso Co., Ltd. | Alternating current generator and schottky barrier diode |
-
1999
- 1999-05-31 FR FR9906972A patent/FR2794303B1/en not_active Expired - Lifetime
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0052860A2 (en) * | 1980-11-26 | 1982-06-02 | Deutsche ITT Industries GmbH | Monolithic integrated semiconductor bridge circuit |
| US4777580A (en) * | 1985-01-30 | 1988-10-11 | Maxim Integrated Products | Integrated full-wave rectifier circuit |
| US5510972A (en) * | 1994-06-29 | 1996-04-23 | Philips Electronics North America Corporation | Bridge rectifier circuit having active switches and an active control circuit |
| US5694311A (en) * | 1995-03-31 | 1997-12-02 | Nippondenso Co., Ltd. | Power supply system |
| GB2301240A (en) * | 1995-05-25 | 1996-11-27 | Smiths Industries Plc | Rectifier circuit |
| US5780996A (en) * | 1995-06-23 | 1998-07-14 | Nippondenso Co., Ltd. | Alternating current generator and schottky barrier diode |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2794303B1 (en) | 2001-08-17 |
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