Control method for full bridge synchronous rectifying circuit

The invention discloses a control method for a full bridge synchronous rectifying circuit. The control method comprises the following steps: when load current is larger than a critical value, adopting a soft switch to take each switch tube in a full bridge inverter circuit as a zero voltage switch (...

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Bibliographische Detailangaben
Hauptverfasser:	WANG XIAOKUN, CHEN LEIMIN
Format:	Patent
Sprache:	eng
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 ELECTRICITY GENERATION
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Beschreibung
Zusammenfassung:	The invention discloses a control method for a full bridge synchronous rectifying circuit. The control method comprises the following steps: when load current is larger than a critical value, adopting a soft switch to take each switch tube in a full bridge inverter circuit as a zero voltage switch (ZVS); otherwise, adopting a hard switch for taking each switch tube in the full bridge inverter circuit as a hard switch. According to the control method, the hard switch and the soft switch are automatically switched according to the size of load current, so that smallest energy consumption is obtained, and the working efficiency under a full working condition of a switch power supply is improved.