Abstract
We already developed a conventional SMR (Switch Mode Rectifier) converter using bilateral switch. A conventional SMR converter has a weak point that is to be need of AC snubber circuit and the complicated circuit for regeneration of snubber energy.This paper discribes a novel three-phase SMR converter which was named DC-Clamped type SMR ( DCC-SMR ) using direct frequency changing technology for industrial use power supply. DCC-SMR consists of frequency changer, HF (High Frequency) transformer and HF rectifier. Frequency changer of DCC-SMR doesn't use bilateral switch. Then, we can use DC snubber for switch. Furthermore, DCC-SMR doesn't-need regenerative circuit and discharge resistance, because snubber circuit is only capaciter and snubber energy is regenerated to primary winding of HF transformer by main switch.We verified usefulness in experimentation. Moreover, we refer to efficiency of 100kw prototype system.
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