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...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	DOFFIN, Hugues, CREGUT, Samuel
Format:	Patent
Sprache:	eng ; fre ; ger
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.