Novel zero-current-switching (ZCS) PWM switch cell minimizingadditional conduction loss
Hang-Seok Choi; Bo Hyung Cho
Industrial Electronics, IEEE Transactions on
Volume 49, Issue 1, Feb 2002 Page(s):165 - 172
Digital Object Identifier 10.1109/41.982260
Summary:This paper proposes a new zero-current-switching (ZCS) pulsewidth
modulation (PWM) switch cell that has no additional conduction loss of
the main switch. In this cell, the main switch and the auxiliary switch
turn on and turn off under zero-current condition. The diodes commutate
softly and the reverse-recovery problems are alleviated. The conduction
loss and the current stress of the main switch are minimized, since the
resonating current for the soft switching does not flow through the main
switch. Based on the proposed ZCS PWM switch cell, a new family of
DC-to-DC PWM converters is derived. The new family of ZCS PWM converters
is suitable for the high-power applications employing insulated gate
bipolar transistors. Among the new family of DC-to-DC PWM converters, a
boost converter was taken as an example and has been analyzed. Design
guidelines with a design example are described and verified by
experimental results from the 2.5 kW prototype boost converter operating
at 40 kHz
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