A high gain input parallel output-series dc dc converter with dual coupled inductors

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• Abstract:
• Introduction:
• Literature Survey:
• System Analysis:
• Existing System:
• Disadvantages:
• Proposed System:
• Advantages:
• System Requirements:
• Block Diagram:
• Working Flow Diagram:
• Circuit Diagram:
• Implementation:
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• System Study:
• System Testing:
• Software Description:
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A HIGH GAIN INPUT-PARALLEL OUTPUT-SERIES DC/DC
CONVERTER WITH DUAL COUPLED INDUCTORS
TITLE
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ABSTRACT
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 paper 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. A prototype
circuit rated 500-W output power is implemented in the laboratory, and the experimental results
shows satisfactory agreement with the theoretical analysis.
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