DSP based space vector PWM for three-level inverter with DC-link voltage balancing

Author

Liu, Hyo L. ; Choi, Nam S. ; Cho, Gyu H.

Author_Institution

Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Seoul, South Korea

fYear

1991

fDate

28 Oct-1 Nov 1991

Firstpage

197

Abstract

The authors describe a novel PWM (pulse width modulation) method for a three-level inverter considering the DC link capacitor balancing problem. Each voltage vector on the space vector plane is classified in relation to the charging/discharging action of DC capacitors, and a novel modulation method is suggested based on the voltage vector selection principle. The algorithm was implemented on the Motorola DSP 56000 and tested with the 7.5 kVA prototype three-level transistor inverter. The effectiveness of the proposed PWM method was verified by the experimental results. It was shown that the proposed PWM techniques are suitable for a high-power GTO (gate turn-off thyristor) three-level inverter satisfying capacitor voltage balancing

Keywords

digital control; digital signal processing chips; invertors; power capacitors; power transistors; pulse width modulation; thyristor applications; voltage control; 7.5 kVA; DC link capacitor; DSP; GTO; Motorola DSP 56000; algorithm; digital control; power capacitors; space vector PWM; three-level inverter; thyristor applications; transistor; voltage balancing; voltage control; voltage vector selection; Capacitors; Digital signal processing; Pulse inverters; Pulse width modulation; Pulse width modulation inverters; Space charge; Space vector pulse width modulation; Testing; Thyristors; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Electronics, Control and Instrumentation, 1991. Proceedings. IECON '91., 1991 International Conference on

Conference_Location

Kobe

Print_ISBN

0-87942-688-8

Type

conf

DOI

10.1109/IECON.1991.239306

Filename

239306