Title :
Carrier-based Pulse Width Modulation for Three-Level Inverters: Neutral Point Potential and Output Voltage Distortion
Author :
Kim, Jang-Hwan ; Sul, Seung-Ki
Author_Institution :
Electr. Eng. & Comput. Sci., Seoul Nat. Univ.
Abstract :
Inherent problem in three-level neutral-point-clamped voltage source inverters (NPC VSI) is the variation of the neutral point potential. This paper proposes a carrier-based PWM technique, which can balance the neutral point potential and minimize the output voltage distortion. Additionally, the modulated voltage error caused by the unbalance of the neutral point potential is analyzed and the method to eliminate the error is described. The validity of the proposed PWM method is verified by computer simulation and experimental results
Keywords :
PWM invertors; NPC voltage source inverters; carrier-based PWM technique; pulse width modulation; three level inverters; three-level neutral-point-clamped VSI; voltage distortion inherent problem; Computer errors; Computer science; Computer simulation; Harmonic distortion; Pulse inverters; Pulse width modulation; Pulse width modulation inverters; Space vector pulse width modulation; Switching circuits; Zero voltage switching; carrier-based PWM; neutral point potential; neutral point-clamped voltage source inverter; output voltage distortion;
Conference_Titel :
Power Electronics and Motion Control Conference, 2006. IPEMC 2006. CES/IEEE 5th International
Conference_Location :
Shanghai
Print_ISBN :
1-4244-0448-7
DOI :
10.1109/IPEMC.2006.4778066
