Very high efficiency SAZZ chopper using high speed IGBT
In this paper a study for very high efficiency targeting 99 % range converter is described. We have proposed a new soft switching boost type chopper based on snubber assisted zero voltage and zero current transition (SAZZ) with output diode fabricated “SiC schottky diode”. The output power of 8 kW with the efficiency of 98.96% was obtained. The loss breakdown evaluation of SiC-SAZZ is discussed.
The principle and equipment for slotting large gear hobbing machine is put forward in this article.How to apply interpolation set is discussed.And then,this method is compared with traditional machining method.