Modified PWM schemes for Cyclo-inverters

Author

Agarwal, Vineeta ; Kumar, Anupam ; Singh, Rajdeep ; Robin, T.J.

Author_Institution

Dept. of Electr. Eng, MNNIT, Allahabad

fYear

2007

fDate

3-6 Dec. 2007

Firstpage

655

Lastpage

660

Abstract

Modulation techniques namely sinusoidal PWM and space vector PWM, usually applied for inverters and matrix converters have been modified in this paper for applying them in cyclo-inverter. It has been found that for Sine PWM, for modulation index, m, around 0.5 to 1, the minimum total harmonic distortion factor (THD) obtained is 10%. The harmonic contents in the cyclo-inverter output gradually increase when m is less than 0.5. Cyclo-inverter output improves for space vector PWM where THD has been found to as low as 5% only. Thus, space vector modulation is recommended in cyclo- inverters as compared to sinusoidal PWM technique both in terms of switching losses as well as harmonic reduction, though at a high computational cost.

Keywords

PWM invertors; cycloconvertors; harmonic distortion; switching convertors; PWM schemes; cyclo-inverters; harmonic reduction; matrix converters; modulation index; space vector PWM; space vector modulation; switching losses; total harmonic distortion factor; Circuits; Insulated gate bipolar transistors; Power engineering; Pulse amplifiers; Pulse width modulation; Pulse width modulation inverters; Shape control; Space vector pulse width modulation; Support vector machines; Voltage control; Cyclo-Inverter; Distortion factor; Harmonics; Modulation Index; Space Vector; Switching loss;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Engineering Conference, 2007. IPEC 2007. International

Conference_Location

Singapore

Print_ISBN

978-981-05-9423-7

Type

conf

Filename

4510108