Input Current-Ripple Consideration for the Pulse-link DC-AC Converter for Fuel Cells by Small Series LC Circuit

This paper mentions the input current ripple reduction method of the Pulse-link DC-AC Converter for Fuel Cells. The conventional DC-AC converter for fuel cells is interpolated large capacitor between boost converter stage and PWM inverter stage. That capacitor disturbs the size reduction of this unit. To overcome this problem, authors have proposed a novel topology called as Pulse-link DC-AC converter. The proposed topology provides boosted-voltage pulse directly to PWM inverter. This topology does not require large capacitor between two stages. Instead, small values of inductor and capacitor are connected series and inserted between two stages in parallel. This paper examines the relationship between the inductor and capacitor values and input current-ripple. As the result, inductor value has the relationship with current-ripple.24th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2009; Washington, DC; 15 February 2009 through 19 February 200

Consideration for input current-ripple of pulse-link DC-AC converter for fuel cells

This paper mentions the static characteristics of pulse-link DC-AC converter for fuel cells, and considers the input current-ripple reduction method. Fuel cells have weakness about current-ripple because the chemical reaction time is much slower than commercial frequency. Therefore, the input current-ripple reduction is essential factor in the DC-AC converter for fuel cells applications. Input current-ripple from fuel cells gives damage the fuel consumption and life time. The conventional DC-AC converter has large smoothing capacitor between boost converter stage and PWM converter stage, in order to reduce input current-ripple. That capacitor prevents from reduction the size of unit. Authors have proposed a novel topology called as pulse-link DC-AC converter. The pulselink DC-AC converter topology is no need to insert large capacitor. Furthermore, the series-connected LC circuit between two stages connected in parallel works as ripple canceling. This paper shows the mechanism of currentripple reduction.2008 13th International Power Electronics and Motion Control Conference, EPE-PEMC 2008; Poznan; 1 September 2008 through 3 September 200

Input Current-Ripple Reduction Methods for Pulse-link DC-AC Converter for Fuel Cells

This paper analyzes the steady-state characteristics of pulse-link DC-AC converters applying input current-ripple reduction methods in fuel cell applications. In that kind of applications, small input current-ripple is essential. This limitation is caused by the fuel-cell chemical reaction time. Excessive and pulsed current drawn from the fuel-cell may result in less life-time or damage. In order to reduce the input current-ripple, conventional DC-AC converters for fuel-cell applications normally have large smoothing capacitor placed between boost converter stage and PWM converter stage. However, this capacitor consumes additional space, weight, and cost. A novel topology called pulse-link DC-AC converter is proposed in order to solve the abovementioned issue. This new topology does not require large capacitor value to minimize the input current-ripple. Instead, it uses series-LC circuit placed in parallel between two connected stages. The mechanism of current-ripple reduction is presented. Experimental results showing input current ripple as small as 0.3 A with only small inductance and capacitance value is also demonstrated

燃料電池用パルスリンク方式DC-ACコンバータにおける入力電流リプル低減

This paper analyzes the steady-state characteristics of pulse-link DC-AC converters applying input current-ripple reduction methods in fuel cell applications. In that kind of applications, small input current-ripple is essential. This limitation is caused by the fuel-cell chemical reaction time. Excessive and pulsed current drawn from the fuel-cell may result in less life-time or damage. In order to reduce the input current-ripple, conventional DC-AC converters for fuel-cell applications normally have large smoothing capacitor placed between boost converter stage and PWM converter stage. However, this capacitor consumes additional space, weight, and cost. A novel topology called pulse-link DC-AC converter is proposed in order to solve the abovementioned issue. This new topology does not require large capacitor value to minimize the input current-ripple. Instead, it uses series-LC circuit placed in parallel between two connected stages. The mechanism of current-ripple reduction is presented. Experimental results showing input current ripple as small as 0.3 A with only small inductance and capacitance value is also demonstrated