Title :
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
fDate :
28 Oct-1 Nov 1991
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;
Conference_Titel :
Industrial Electronics, Control and Instrumentation, 1991. Proceedings. IECON '91., 1991 International Conference on
Conference_Location :
Kobe
Print_ISBN :
0-87942-688-8
DOI :
10.1109/IECON.1991.239306
