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Four quadrant SAZZ-1 Chopper for EV and HEV power train
Yukinori Tsuruta,Martin Pavlovsky,Giuseppe Guidi,Atsuo Kawamura 전력전자학회 2011 ICPE(ISPE)논문집 Vol.2011 No.5
This paper discusses four quadrant SAZZ-1 chopper (Snubber Assisted Zero Voltage and Zero Current Switching) and its direct application to a EV (Electric Vehicle) power train. The performance of SAZZ-1 chopper is demonstrated on several prototypes. The first prototype is a 25 ㎾, 50 ㎑ SAZZ-1 with efficiency in the range between 96 % and 97 %. This was further improved by a redesigned SAZZ-1 chopper which reached even higher efficiency in the range of 97 % to over 98 %. Further on, a new mid-power 30 ㎾ water cooled SAZZ-1 chopper was constructed for KAST (Kanagawa Academy of Science and Technology) advanced EV project. This prototype was used and fully tested in an EV prototype named KAST-EVKana. As discussed, SAZZ-1 topology proved to be well performing in direct EV application.