Improvement of a PWM controlled NPC GTO inverter for AC motor drives

Author

Ben-Brahim, L.

Author_Institution

Fac. of Technol., Qatar Univ., Doha

Volume

2

fYear

1999

fDate

1999

Firstpage

819

Abstract

This paper describes the application of the vector control technique to a three level or NPC (neutral point clamped) inverter using a DSP (digital signal processor) TMS320C25. A newly developed PWM technique for this kind of inverter is applied. As a result the switching losses as well as the current distortions are reduced. A smaller fluctuation of the neutral point voltage was also obtained. The proposed method was applied to a 20 kW motor using an NPC converter and inverter. Theoretical and practical aspects as well as the experimental results are presented in this report

Keywords

AC motor drives; PWM invertors; digital signal processing chips; electric current control; losses; machine vector control; switching circuits; thyristor convertors; AC motor drives; DSP TMS320C25; PWM controlled NPC GTO inverter; PWM technique; current control; current distortions reduction; digital signal processor; neutral point clamped inverter; switching losses reduction; vector control; AC motors; Digital signal processing; Machine vector control; Power system harmonics; Pulse width modulation; Pulse width modulation inverters; Switches; Switching frequency; Switching loss; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Electronics, 1999. ISIE '99. Proceedings of the IEEE International Symposium on

Conference_Location

Bled

Print_ISBN

0-7803-5662-4

Type

conf

DOI

10.1109/ISIE.1999.798719

Filename

798719