HIGH STEP-UP HIGH GAIN DC-DC BOOST CONVERTER BASED ON COUPLED INDUCTOR METHODOLOGY

Author’s Name :  S Nagaraj | A Mohandoss

Volume 01 Issue 04  Year 2014  ISSN No:  2349-2503  Page no: 5-7

Abstract:

A single switch high gain coupled inductor boost converter with closed loop control for low switch voltage stress. In this converter input energy acquired from the source is first stored in the magnetic field of coupled inductor and intermediate capacitor. In subsequent stages, it is passed on to the output section for load consumption. A passive clamp network around the primary inductor ensures the recovery of energy trapped in the leakage inductance, leading to drastic improvement in the voltage gain and efficiency of the system. Exorbitant duty cycle values are not required for high voltage gain, which prevents problems such as diode reverse recovery. Presence of a passive clamp network causes reduced voltage stress on the switch. This enables the use of low voltage rating switch (with low “on-state” resistance), improving the overall efficiency of the system. Closed loop simulation using PID controller of the converter is done with 40 V DC input and 400W output power.

Keywords:

Coupled inductor, high voltage gain, passive clamp, switched capacitor

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