A
non-isolated bidirectional DC-DC Converter has been presented in this article for
charging and discharging the battery bank through single circuit in applications
of Uninterruptible Power Supplies (UPS) and the hybrid electric vehicles.
The
presented bidirectional converter operates under zero voltage switching (ZVS)
condition and provides large voltage diversity in both the modes of operation.
This enables the circuit to step up the low battery bank voltage to high DC
link voltage and vice versa.
The bidirectional operation of the converter is
achieved by employing only three active switches, a coupled inductor and an
additional voltage clamped circuit.
The experimental results of a 300W prototype of the proposed
converter confirmed the validity of the circuit.
The maximum efficiency of 96%
is obtained at half load for boost operation mode, and 92% for buck mode of
operation.
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