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IEICE TRANSACTIONS on transactions

Dead Time Analysis of Inductor Commutation DC-to-DC Converter Controlled by a Small Saturable Core

Kazurou HARADA, Hiroshi SAKAMOTO, Koosuke HARADA

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Summary :

A novel method of high frequency switching for dc-to-dc converter is presented. This method is based on the commutation with aid of inductor current, where a short interval (dead time) of both switches off is given for removing switching surges and switching losses. By the method of constant current-ripple using a saturable core, the condition of zero voltage switching is made independent of the duty ratio. The output voltage is regulated by pulse width modulation in the same way as that of the conventional converter of PWM control. The mechanism of commutation for giving a dead time is analyzed by assuming equivalent circuits, during which a zero voltage switching is realized. From calculations and experiments, it is found that a desired dead time is derived by connecting external capacitance to the gate-source terminal of the MOSFET.

Publication
IEICE TRANSACTIONS on transactions Vol.E73-E No.9 pp.1442-1448
Publication Date
1990/09/25
Publicized
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DOI
Type of Manuscript
Special Section PAPER (Special Issue on Switched-Mode Power Supplies for Electronics)
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