An Improved Buck-boost Power Converter for Switched Reluctance Generator Drive

Abstract

A novel buck-boost power converter is proposed to improve the performance of switched reluctance generator (SRG) system in an electric vehicle. In the proposed topology, the energy conversion part is formed by a buck-boost circuit and additional switches, with which, it is flexible to significantly boost the magnetization voltage and demagnetization voltage, thereby the output power range is improved and the power losses are reduced. The basic structure of the proposed converter is presented first and the attached operating modes are analyzed. The control strategy of the SRG system is then made to control the output voltage and the boost capacitor voltage. The simulation results show that compared to the conventional buck-boost converter, the proposed converter enhances the efficiency and reduces the power losses.

An integrated switched capacitor coupled inductor Buck-Boost DC-DC converter

“…Achieving an efficient, flexible, and controllable stable operation is essential while expanding the voltage gain range [3,4]. Based on existing research, semiconductor components [5] such as switched capacitors [6,7] and switched inductors [8,9] are commonly used to achieve voltage multiplication. By combining these components into voltage multiplier cells [10], the voltage gain can be increased while reducing the stress on the device.…”