A modulation method for capacitor voltage ripple reduction of the switched-capacitor inverter using series/parallel conversion

Author

Hinago, Youhei ; Koizumi, Hirotaka

Author_Institution

Tokyo Univ. of Sci., Tokyo, Japan

fYear

2011

fDate

14-16 March 2011

Firstpage

105

Lastpage

109

Abstract

A modulation method for capacitor voltage ripple reduction of the switched-capacitor inverter using series/parallel conversion (SCISPC) is proposed. The phase shifted pulse width modulation (PWM) method and the level shifted PWM method are applied to the proposed modulation method. The two capacitors in the 7-level SCISPC is charged alternately by this modulation method. The voltage ripple of these capacitors can be small because the discharging term becomes short. The switching frequency of the proposed modulation method can be reduced. The high efficiency power conversion of the SCISPC is achieved because of the low voltage ripple of the capacitors. The effect of the proposed modulation method is confirmed by the simulation with PSIM and the circuit experiment. The voltage ripple reduction of the capacitors is 33.7% in the simulation result.

Keywords

PWM invertors; switched capacitor networks; PSIM; capacitor voltage ripple reduction; high efficiency power conversion; level shifted PWM method; low voltage ripple; phase shifted pulse width modulation method; series-parallel conversion; switched-capacitor inverter; switching frequency; Loss measurement; Pulse width modulation; Switches;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Technology (ICIT), 2011 IEEE International Conference on

Conference_Location

Auburn, AL

ISSN

Pending

Print_ISBN

978-1-4244-9064-6

Type

conf

DOI

10.1109/ICIT.2011.5754355

Filename

5754355