A Saturable Reactor Assisted Soft-Switching PWM DC-DC Converter
1992 Volume 112 Issue 12 Pages 1226-1234
Details
1992 Volume 112 Issue 12 Pages 1226-1234
In the demand for increasing 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 high current or high voltage ratings for semiconductor devices.
This paper presents a new soft-switching PWM full-bridge DC-DC converter which can overcome these drawbacks by utilizing a small saturable reactor. The principle of operation and steady-state characteristics are illustrated. The role of the saturable reactor is also discussed. Moreover, the voltage and current stresses for active and passive components are presented.
To verify the results, key experiments were implemented with a 350W, 500kHz prototype converter. It is proved that the converter achieves soft-switching in a wide load range with no substantial increase in voltage and current stresses for active and passive components.
The transactions of the Institute of Electrical Engineers of Japan.C
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