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A saturable reactor‐assisted soft switching PWM DC‐DC converter
Author(s) -
Hamada Satoshi,
Ogino Yasumasa,
Nakaoka Mutsuo
Publication year - 1993
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.4391130114
Subject(s) - emi , converters , pulse width modulation , voltage , inductor , power (physics) , electronic engineering , materials science , electrical engineering , electromagnetic interference , engineering , physics , quantum mechanics
Abstract Owing to the demand to increase the power density of switched‐mode power converters, resonant topologies have attracted much attention because of their low switching losses and low EMI. However, they require relatively large resonant components and necessitate high current or voltage ratings at semiconductor devices. This paper describes a new soft‐switching PWM full‐bridge DC‐DC converter which can overcome these drawbacks by utilizing a small saturable reactor. The principles of operation and the steady‐state characteristics are illustrated and the role of the saturable reactor is discussed. Moreover, the voltage and current stresses for active and passive components are also presented. To verify the results, experiments were performed with a 350 W, 500 kHz prototype converter. They demonstrated that the converter achieves soft switching in a wide load range with no substantial increase in voltage and current stresses on active and passive components.