Developing A 25-kW SiC-Based Fast DC Charger (Part 5): Control Algorithms, Modulation Schemes And Feedback
by Oriol Filló, Dionisis Voglitsis, Karol Rendek, Stefan Kosterec and Rachit Kumar, onsemi, Phoenix, Ariz., How2Power Today, Aug 15 2021
Focus:
In the previous parts of this series, the authors have extensively described the
development of a 25-kW EV charger from a hardware perspective. This part 5 explores the
implementation of the control strategy and algorithms for such a system. It provides
firsthand details on the approach to control hardware and software development that the
engineering team has taken, which helps speed up the firmware development and the
validation process. The development process described here ensures that errors are
minimized and detected early on, even before prototype hardware becomes available or is
being designed. This part describes the steps and tools (MathWorks and Xilinx) to
implement such an approach, the state machine and algorithmic blocks for the power factor
correction (PFC) stage, and the main algorithmic blocks for the DAB converter.
What you’ll learn:
- How to develop a control system and firmware for a fast EV charger
- How to develop the simulation models required for control system development for a fast EV charger
- How to develop control algorithms for the PFC stage and the DAB converter in a fast EV charger
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