Key points are not available for this paper at this time.
A low-cost unidirectional dc/dc converter with galvanic isolation for fuel cell electric vehicles is presented in this article. To satisfy the requirements of the fuel cell stack and powertrain system of heavy-duty vehicles, three operation modes: boost, buck-boost, and buck, are proposed. To achieve ZVS operation for low voltage side switching devices, a novel platform current control mechanism is introduced. With the help of the platform current controller, the zero-voltage-switching operation is independent of the input/output voltage ratio. Meanwhile, the near zero-current-switching can be achieved for low voltage side switches under boost mode. The steady-state analyses and small-signal models for both input and platform currents under boost mode are provided. The prototype unit is built, and the corresponding experiments are presented.
Hong et al. (2020) studied this question.