Z-source inverter for motor drives

• Published in: IEEE transactions on power electronics Vol. 20; no. 4; pp. 857 - 863
• Main Authors: Fang Zheng Peng, Joseph, A., Jin Wang, Miaosen Shen, Lihua Chen, Zhiguo Pan, Ortiz-Rivera, E., Yi Huang
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.07.2005; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Applied sciences; Capacitors; Circuits; Control systems; Diodes; Electric potential; Electrical engineering. Electrical power engineering; Electrical machines; Electronics; Exact sciences and technology; Inverters; Line harmonics; Line voltage; Motor drives; Motors; Power electronics, power supplies; Power quality; Power supply; Power system harmonics; Power system reliability; Power system stability; Simulation; Voltage; Voltage control; voltage sags; Z-source inverter; Waveform; Inverter; Motor drives; Z-source inverter; Control system; LC circuit; Power electronics; Experimental result; Line harmonics; voltage sags; Output voltage; Electrical transients; System simulation; Power factor; Reliability; System analysis
• ISSN: 0885-8993; 1941-0107
• DOI: 10.1109/TPEL.2005.850938

This paper presents a Z-source inverter system and control for general-purpose motor drives. The Z-source inverter system employs a unique LC network in the dc link and a small capacitor on the ac side of the diode front end. By controlling the shoot-through duty cycle, the Z-source can produce any desired output ac voltage, even greater than the line voltage. As a result, the new Z-source inverter system provides ride-through capability during voltage sags, reduces line harmonics, improves power factor and reliability, and extends output voltage range. Analysis, simulation, and experimental results will be presented to demonstrate these new features.