Title :
Improvement for very high efficiency chopper circuit SAZZ
Author :
Tsuruta, Yukinori ; Pavlovsky, Martin ; Kawamura, Atsuo
Author_Institution :
KAST, Yokohama Nat. Univ., Yokohama, Japan
Abstract :
The paper describes a study aiming at reaching a very high 99% efficiency in DC-DC chopper for electric vehicle (EV) application by improvements of conventional SAZZ topology. Optimisation of the operating frequency and the use multiple parallel SiC diodes were the main improvements of SAZZ chopper that were studied. These led to obtaining the efficiency of 98.96% in an 8 kW experimental setup. New, 30 kW fully bi-directional DC-DC converter based on SAZZ topology is introduced in this paper as well. The main goal of this new design was to reach efficiency close to 99% by improving the performance of SAZZ topology through small modifications as discussed in the paper. The proposed modifications are simple, but result in substantial improvements with high conversion efficiency over 98% over whole practical region in the power range required by EV application.
Keywords :
DC-DC power convertors; choppers (circuits); electric vehicles; optimisation; silicon compounds; switching convertors; wide band gap semiconductors; zero current switching; zero voltage switching; DC-DC chopper; SiC; bidirectional DC-DC converter; electric vehicle application; multiple parallel diode; optimisation; power 30 kW; power 8 kW; snubber assisted zero voltage-and-zero current switching topology; Capacitors; Choppers; Circuit topology; DC-DC power converters; Hybrid electric vehicles; Prototypes; Switches; Switching circuits; Switching converters; Zero voltage switching; Converter circuit; IGBT; Power converters for EV; Soft switching; ZCZVS Converter;
Conference_Titel :
Power Electronics and Applications, 2009. EPE '09. 13th European Conference on
Conference_Location :
Barcelona
Print_ISBN :
978-1-4244-4432-8
Electronic_ISBN :
978-90-75815-13-9
