A new boost switched capacitor multilevel inverter using different multi carrier PWM techniques

Author

Kanimozhi, M. ; Geetha, P.

Author_Institution

Dept. of EEE, Saranathan Coll. of Eng., Tiruchirapalli, India

fYear

2014

Firstpage

432

Lastpage

437

Abstract

In this paper, a new boost switched capacitor multilevel inverter is proposed. Two structures: a switched capacitor circuit & a two level (full bridge) inverter are connected in cascade. The proposed inverter outputs a larger output voltage than the input voltage. The inverter can be smaller than the conventional two-stage inverter, which consists of boost converter and a full bridge inverter. Number of switching devices used in the circuit is reduced as compared to the conventional cascaded multilevel inverter of same configuration. The multilevel dc output voltage of the switched capacitor circuit is the input voltage of the classical full bridge inverter, resulting in a staircase output voltage waveform. Such a multilevel waveform is close to a sinusoid; its harmonic content can be reduced when compared to the conventional multilevel inverter by using the pwm control strategy. The proposed inverter is driven by different multi carrier based techniques like PDPWM, PODPWM & APODPWM and total harmonic distortion (THD) of each type is compared. The simulation model is done using MATLAB 7.9/ SIMULINK package & results are shown.

Keywords

PWM invertors; bridge circuits; cascade networks; harmonic distortion; power capacitors; power conversion harmonics; switched capacitor networks; switching convertors; APODPWM; MATLAB 7.9-SIMULINK package; PDPWM; PWM control strategy; THD; alternate phase opposition disposition; boost converter; boost switched capacitor multilevel inverter; cascaded multilevel inverter; full bridge inverter; multicarrier PWM techniques; multilevel DC output voltage; multilevel waveform; staircase output voltage waveform; switched capacitor circuit; switching devices; total harmonic distortion; two-level inverter; two-stage inverter; Bridge circuits; Capacitors; Inverters; Pulse width modulation; Switches; Switching circuits; APODPWM; Cascaded H-bridge inverter; Multilevel Inverter; PDPWM; PODPWM; SPWM; Switched Capacitor(SC); THD; multi carrier PWM;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuit, Power and Computing Technologies (ICCPCT), 2014 International Conference on

Print_ISBN

978-1-4799-2395-3

Type

conf

DOI

10.1109/ICCPCT.2014.7054905

Filename

7054905