This work focuses on a new high step-up gain Luo converter with reduced device stresses, for power factor correction (PFC) at front-end of electric vehicle (EV) battery charger. To produce the same DC-link voltage, the benefit with this converter, is achieved in terms of low device stresses as compared to a conventional Luo converter. This new Luo converter operates at lower duty cycle due to switched inductor structure at input, which facilitates reduced conduction loss and better charger efficiency. A flyback converter is used at next stage, which controls the battery current during constant current-constant voltage mode. The high gain converter as well as a flyback converter design is achieved in discontinuous conduction mode (DCM). This gives the advantage of reduced cost and size with less sensors in the circuit and low magnetic volume. A prototype is developed to test the improved power quality (PQ) performance of the charger, at steady state and at sudden varying line voltages. A comparative study of this converter with other voltage-lift type Luo converter in the literature, is given to show the reduced device stress, less components and improved efficiency.
An Improved Power Factor Luo Converter based Battery Charger for Electric Vehicle
2020-06-01
622066 byte
Conference paper
Electronic Resource
English