Feedforward-Double Feedback Control System of Dual-Switch Boost DC/DC Converters for Fuel Cell Vehicles

Xiaogang Wu, Boyang Yu, Jiuyu Du and Wenwen Shi
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Xiaogang Wu: School of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin 150080, China
Boyang Yu: School of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin 150080, China
Jiuyu Du: State Key Laboratory of Automotive Safety and Energy, Tsinghua University, Beijing 100084, China
Wenwen Shi: School of Electrical and Electronic Engineering, Harbin University of Science and Technology, Harbin 150080, China

Energies, 2019, vol. 12, issue 15, 1-18

Abstract: DC/DC converters for fuel cell electric vehicles need not only high boost ratio and high efficiency, but also strong anti-jamming capability. Therefore, it is especially important to devise a control method with strong robustness under the premise of an appropriate topology. In this paper, a simple dual-switch boost converter topology is adopted. We use the state space averaging method to build a small signal model, and based on this model, we propose a feedforward-double feedback control system for continuous conduction mode (CCM) mode. Simulation and experimental results show that the proposed feedforward-double feedback control system improves the robustness of the system while ensuring a high boost ratio and efficiency, and solves the problem of weak output characteristics of fuel cells. The control effect is similar to the sliding mode control, which is known for its robustness, while the rise time of step response is only 1/10 of that of the voltage feedback control system. When the output voltage of the DC/DC converter is 55 V, the DC/DC converter using feedforward-double feedback control system is more robust than the voltage feedback control system under sudden change of load.

Keywords: fuel cell vehicles; DC/DC converter; feedback control; feedforward control (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
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