A Novel DC-DC Boost Converter with Coupled Inductors for High Gain and Smooth Switching

Abstract

This work deals with a novel high step-up isolated DC-DC boost converter proposed with the help of a couple of inductors. At present, eco-friendly vehicles like Electric-Vehicles (EVs), Hybrid Electric Vehicles (HEVs), and Plug-In Electric Vehicles (PEVs) are effectively used as a feasible solution for achieving high efficiency over fossil-fuel operated vehicles, releases low emissions, global warming, noise-less, low maintenance, so on. In general, the vehicles like Internal Combustion Vehicles (ICE) are propelled by using fossil fuels like petrol, diesel, gasoline, and so on. But the efficiency is very low in this system because of the usage of hydraulic and mechanical components which requires more maintenance, high fuel consumption, toxic emissions, and so on. To overcome these challenges a novel Isolated DC-DC converter has been proposed adopted from Zeta converter with slight modifications. The proposed isolated DC-DC boost converters are used in many applications, due to high step-up gains, low duty ratios, high efficiency, low EMI loss, and low switch stress, so on. It has high power capacity, greater reliable features, and a modular, compact size best suitable for vehicular applications. Employing the high turns ratio of coupled inductor attains high voltage step-up gain as well as the secondary winding is in series with a switched capacitor for obtaining increased voltage level.  Following is a detailed description of the proposed Isolated DC-DC converter: (a) The energy in connected inductor leaky inductors may be recycled, increasing overall system efficiency and reducing voltage spikes. (b) Using linked capacitor and switched capacitor methods maximizes the conversion gain ratio. (c) Creates an isolation channel while the solar PV arrays are not working, preventing electric risks to humans. The performance of the system is studied in the simulation environment.