METHOD AND SYSTEM FOR CONTROLLING A BIDIRECTIONAL CHARGER OF A MOTOR VEHICLE BATTERY

The invention relates to a method for controlling a bidirectional charger including a rectifier stage connected, on one hand, to a power grid and, on the other hand, to a capacitor and to a conversion stage (2), which is itself connected to a battery. The conversion stage (2) includes: a first trans...

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Bibliographische Detailangaben
Hauptverfasser:	CREGUT, SAMUEL, DOFFIN, HUGUES
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS CONTROL OR REGULATION THEREOF CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER CONVERSION OR DISTRIBUTION OF ELECTRIC POWER ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES ELECTRICITY ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL GENERATION MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES PERFORMING OPERATIONS TRANSPORTING VEHICLES IN GENERAL
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Beschreibung
Zusammenfassung:	The invention relates to a method for controlling a bidirectional charger including a rectifier stage connected, on one hand, to a power grid and, on the other hand, to a capacitor and to a conversion stage (2), which is itself connected to a battery. The conversion stage (2) includes: a first transistor assembly (T1, T2, T3, T4) connected in series to the primary winding of a transformer (6) and to a resonant circuit; and a second transistor assembly (T5, T6, T7, T8) connected to the secondary winding of the transformer. The method includes the following steps: the first assembly is controlled at the resonance frequency of the resonant circuit; if the coupling ratio between the battery voltage and the rectified voltage is greater than the ratio between the maximum battery voltage and the minimum rectified voltage, the second assembly is switched on; if not, the second assembly is switched over in such a way that the secondary winding is short-circuited to a period depending on the coupling ratio. Procédé de commande d' un chargeur bidirectionnel comprenant un étage redresseur connecté d ' une part à un réseau électrique et, d' autre part à une capacité et à un étage de conversion (2) connecté lui-même à une batterie, l' étage de conversion (2) comprenant un premier ensemble de transistors (T1,T2,T3,T4) relié en série au primaire d' un transformateur (6) et à un circuit résonnant et un deuxième ensemble de transistors (T5,T6, T7, T8) relié au secondaire du transformateur. Le procédé comprend les étapes suivantes : on commande le premier ensemble à la fréquence de résonance du circuit résonnant, si le rapport de couplage entre la tension de batterie et la tension redressée est supérieur au rapport entre la tension maximale de batterie et la tension minimale redressée, on rend le deuxième ensemble passant, sinon, on commute le deuxième ensemble de sorte que le secondaire soit court-circuité à une période dépendant du rapport de couplage.