A HIGH GAIN INPUT-PARALLEL OUTPUT-SERIES DC/DC CONVERTER
High voltage gain dc–dc converters are required in
many industrial applications such as photovoltaic and fuel cell energy systems,
high-intensity discharge lamp (HID), dc back-up energy systems, and electric
vehicles.
This article presents a novel input-parallel output-series boost
converter with dual coupled inductors and a voltage multiplier module.
On the
one hand, the primary windings of two coupled inductors are connected in
parallel to share the input current and reduce the current ripple at the input.
On the other hand, the proposed converter inherits the merits of interleaved
series-connected output capacitors for high voltage gain, low output voltage
ripple, and low switch voltage stress.
Moreover, the secondary sides of two
coupled inductors are connected in series to a regenerative capacitor by a
diode for extending the voltage gain and balancing the primary-parallel
currents.
In addition, the active switches are turned on at zero current and
the reverse recovery problem of diodes is alleviated by reasonable leakage
inductances of the coupled inductors.
Besides, the energy of leakage
inductances can be recycled.
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