Title :
A novel PWM scheme for a three-level voltage source inverter with GTO thyristors
Author :
Lee, Yo-Wan ; Suh, Bum-Seok ; Hyun, Dong-seok
Author_Institution :
Dept. of Electr. Eng., Hanyang Univ., Seoul, South Korea
Abstract :
This paper presents a new PWM method for the three-level GTO inverters based on the space voltage vectors. With the proposed PWM method, we can minimize the harmonic components of the output voltage by avoiding the minimum pulse width limitation problem of the GTO thyristors and keeping the voltage balancing of the DC-link capacitors. The principle of the proposed PWM method and the voltage vector output sequences are described in detail. Computer simulation and experimental results verify that the proposed PWM method is suitable for high voltage and large capacity three-level GTO inverters applied to induction motor drives
Keywords :
PWM invertors; induction motor drives; power system harmonics; thyristor convertors; DC-link capacitors; GTO thyristors; PWM method; computer simulation; harmonic components minimisation; induction motor drives; space voltage vectors; three-level voltage source inverter; voltage balancing; voltage vector output sequences; Capacitors; Circuits; Diodes; Pulse width modulation; Pulse width modulation inverters; Region 1; Snubbers; Space vector pulse width modulation; Thyristors; Zero voltage switching;
Journal_Title :
Industry Applications, IEEE Transactions on
