PROJECT TITLE:

A High Gain Input-Parallel Output-Series DC/DC Converter with Dual Coupled-Inductors -2015

ABSTRACT:

High voltage gain dc-dc converters are needed in several industrial applications such as photovoltaic and fuel cell energy systems, high-intensity discharge lamp (HID), dc back-up energy systems, and electric vehicles. This paper presents a novel input-parallel output-series boost converter with dual coupled inductors and a voltage multiplier module. On the one hand, the first windings of 2 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 deserves of interleaved series-connected output capacitors for top voltage gain, low output voltage ripple, and low switch voltage stress. Moreover, the secondary sides of 2 coupled inductors are connected in series to a regenerative capacitor by a diode for extending the voltage gain and balancing the first-parallel currents. In addition, the active switches are turned on at zero current and the reverse recovery drawback of diodes is alleviated by affordable leakage inductances of the coupled inductors. Besides, the energy of leakage inductances will be recycled. A prototype circuit rated 500-W output power is implemented in the laboratory, and also the experimental results shows satisfactory agreement with the theoretical analysis.