STEP-UP DC/DC POWER SUPPLY CIRCUIT

PROBLEM TO BE SOLVED: To prevent excessive counter electromotive force of a reactor from being applied to a semiconductor transistor even if an interruption switch is operated in a step-up DC/DC power supply circuit including a reactor.SOLUTION: An output side interruption element 54 is provided bet...

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Bibliographische Detailangaben
1. Verfasser:	MIZUI KEIZO
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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Zusammenfassung:	PROBLEM TO BE SOLVED: To prevent excessive counter electromotive force of a reactor from being applied to a semiconductor transistor even if an interruption switch is operated in a step-up DC/DC power supply circuit including a reactor.SOLUTION: An output side interruption element 54 is provided between one terminal of a second switch element 52 on the output side of the step-up circuit of a step-up DC/DC power supply circuit and a Vterminal, and a bypass switch element 56 is provided between the joint of the second switch element 52 and the output side interruption element 54 and the Vside of a reactor 46. Since an EN signal from the EN terminal 16 changes from H level to L level in the output interruption state, the output side interruption element 54 is turned off and the bypass switch element 56 is turned on. Consequently, a route of the reactor 46-the forward direction of a diode D2-the bypass switch element 56-a power storage device 12 is formed, and the counter electromotive force of the reactor 46 is regenerated.