Abstract:
The charging unit of battery electric vehicle is one of the primary subsystem which allows its interconnection with the charging facility. Due to nonlinear behavior of power
conditioning circuitry and its sensitivity to external disturbances, robust nonlinear controller is required to achieve various control objectives like output voltage regulation and
power factor correction. But many nonlinear controllers like sliding mode and robust
integral backstepping can perfectly control the single phase AC to DC power conversion
in BEV charger at the cost of chattering. This chattering can cause heat and power
losses in BEV charger. In order to resolve this problem, supertwisting sliding mode
algorithm based controller has been designed in this paper which not only decreases
the chattering but also improves the overall dynamic performance of the system. Various control objectives like unitary power factor and regulation of DC bus voltage, are
achieved by the designed ST-SMC. IBS-SMC has also been designed for the control of
ACDC power converter in BEV charger. ST-SMC has been compared with robust IBS
and other nonlinear controllers for the control of BEV charger. The robustness of the
designed controller has been checked by adding external disturbances in the plant. The
overall results show the best performance of ST-SMC among other nonlinear controllers
in terms of robustness and dynamic performance. Simulations have been performed
using Matlab/Simulink ODE 45 environment. To further validate the designed controller for BEV charger, hardware in the loop (HIL) simulations have been done using
F28379D dual core microcontroller. HIL simulations have also proved the effectivity of
the designed controller for BEV charger
