Design of Mono Stage LUO Converter for Electric Vehicles Charging System

Abstract

The Electric Vehicle (EV) is gaining more attraction in recent years due to the reduction of pollution and increase in fuel costs. The commercialization of EV is still struggling to find the better solution for charging facilities due to lack of charging station and time required for charging the EV. The research in charging infrastructure is increased in recent years to increase the charging facilities [1]. The Light Duty EVs has huge demand among the customers, but due to lack of charging facilities the distributors and consumers are worried to utilize the EV in their daily routine. The Government of India has created the standards for EV charging and battery swapping technologies to avoid the confusion for the charging station providers.

In [2], a charger with coupled winding structure is designed that reduced the current stress and switch voltage. But this arrangement results in the complexity of isolation transformer and makes it bulky. The voltage stress in semiconductor devices is high with the singe stage single switch configuration that results in lower efficiency [3]. The non-isolated negative output Luo Converter is discussed in [4], which gives better performances like lower input and output ripple, higher voltage conversion ratio, etc. The Luo converter is broadly utilized in super-lift, re-lift and ultra-lift applications [5]. The charging station with 12 kW along with 6 kWh capacity of the battery is designed in [6]. The converter proposed in [7] will operate in both buck and boost mode simultaneously. In the resonant LLC converter that eliminates the switching losses in ZVS mode is fed by the CUK converter. The battery supplies the input to converter which is stabilized and improved with the help of inductor [8].