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Takeshi Uematsu,Noriyuki Hirano,Tamotsu Ninomiya,Masahito Syoyama 전력전자학회 1998 ICPE(ISPE)논문집 Vol.- No.-
A three-arm PWM UPS is realizable low price and small size UPS In this UPS configuration, the center arm operates in both PWM converter mode and PWM inverter mode. Therefore, the operation of this UPS differs from the conventional UPS. In this paper, the three-arm PWM UPS is analyzed and a trial product is realized.<br/>
PARALLEL-RESONANT CONVERTER WITH ZVS-PWM CONTROL
Tamotsu NINOMIYA,Takayoshi HASHIMOTO,Hidekazu TANAKA,Masahito SYOYAMA,Richard P.TYMERSKI 전력전자학회 1998 ICPE(ISPE)논문집 Vol.- No.-
A parallel-resonant converter with zero-voltage-switching, pulse-width-modulation (ZVS-PWM) control is proposed Similar to the previously proposed series-resonant counterpart, it has a simple structure and can be controlled at a constant switching frequency using an active-clamp technique The nearly constant current output characteristic of the parallel-resonant converter lends itself beneficially to precisely controlled constant current power supply applications. An experimental breadboard featured an accuracy of ± 1% for an output current of 2A, with an efficiency of 75%.<br/>