Abstract:
In response to the growing demand for efficient charging solutions for electric
vehicles (EVs), this research introduces a robust non-linear control strategy for
Electric Vehicle (EV) charger, employing a high-performance single-stage AC-DC
current-fed resonant quasi converter. The proposed research recommends
implementing a super-twisting sliding mode controller (ST-SMC) to robustly control
an EV charger, ensuring precise regulation of current and voltage for battery
charging purposes. The converter’s design features high-frequency operation, less
switching losses, enhanced efficiency, and unity power factor, making it an
appealing choice for EV charging infrastructure. Fixed duty ratio of 0.5 at primary
side switches reduces the input current ripples inspite of the variation in grid voltage
and different load. Primary side switches turn ON at voltage close to zero (ZVS)
while bidirectional switches at secondary side shows ZVS phenomenon at turn OFF
instants that effectively reduces the switching losses and shows amended efficiency.
It shows the effectiveness of design and control approach, presenting rapid response
and precise output voltage regulation under various operating conditions as
discussed in this paper. The validation of the controller's performance and safety is
conducted through hardware-in-loop (HIL) based experimental verification
employing the Delfino F28369D dual-core microcontroller. The proposed converter
and control algorithm is simulated using MATLAB/Simulink and PSIM software.
