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Half wave rectifier

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A half-wave rectifier is a fundamental circuit in electronics, designed to convert alternating current (AC) voltage into a unidirectional voltage. It utilizes the simplest form of diode rectification, where the circuit comprises a single diode in series with a load resistor and an AC power source.
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The power transmission to a factory involves the transfer of apparent power, a combination of active and reactive power. The power factor measures how effectively electrical power is converted into useful work output. The ratio of the real power (KW) that does the work to the apparent power (KVA) supplied to the circuit.
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Interleaved quartic high gain DC-DC converter.

T Sakthiram1, L Yogesh1, Rahul Srikanth1

  • 1School of Electrical Engineering, Vellore Institute of Technology, Chennai Campus, Vellore, India.

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This study introduces a novel high-gain DC-DC converter achieving ultra-step-up voltage gain. The converter offers high efficiency and stable output, making it suitable for renewable energy applications.

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Area of Science:

  • Electrical Engineering
  • Power Electronics
  • Renewable Energy Systems

Background:

  • Traditional DC-DC converters face limitations in achieving ultra-high voltage gains required for applications like photovoltaic systems.
  • Interleaved Boost Converters (IBCs) offer advantages but often require complex structures for significant voltage multiplication.

Purpose of the Study:

  • To propose and validate a novel high-gain DC-DC converter with ultra-step-up voltage gain capability.
  • To enhance voltage gain through a hybrid approach combining existing topologies and novel gain extension cells.
  • To demonstrate the converter's performance, efficiency, and stability under various operating conditions.

Main Methods:

  • Synthesizing a new converter topology from a two-phase Interleaved Boost Converter (IBC) and incorporating a voltage lift capacitor.
  • Implementing a floating capacitor-based gain extension cell to further boost the voltage gain.
  • Cascading these stages to achieve a quartic (4th power) voltage gain enhancement.
  • Validating the design through experimental testing of a 16V to 400V, 150W prototype.

Main Results:

  • The prototype converter achieved a 150W output at 400V with 92.7% full-load efficiency.
  • The converter demonstrated stable output regulation under dynamic input voltage and load variations with negligible overshoot/undershoot.
  • The hybrid voltage gain extension technique resulted in low voltage stress on semiconductor devices and ripple-free input current.
  • Maximum voltage gain reached 37 at a reduced input voltage of 10.8V while maintaining safe duty ratios.

Conclusions:

  • The proposed converter effectively achieves ultra-high step-up voltage gain with high efficiency and stable performance.
  • The hybrid gain extension technique offers a significant advantage in voltage multiplication compared to conventional converters.
  • The converter's features, including common-ground connection and ripple-free input current, make it highly suitable for photovoltaic (PV) applications.