Z-source inverter

• Published in: IEEE transactions on industry applications Vol. 39; no. 2; pp. 504 - 510
• Main Author: Peng, Fang Zheng
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.03.2003; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Capacitors; Conversion; Converters; DC-DC power converters; Electric circuits; Electromagnetic interference; Fuel cells; Impedance; Inductors; Inverters; Power conversion; Power converters; Rectifiers; Simulation; Studies; Switching circuits; Thyristors; Voltage
• ISSN: 0093-9994; 1939-9367
• DOI: 10.1109/TIA.2003.808920

This paper presents an impedance-source (or impedance-fed) power converter (abbreviated as Z-source converter) and its control method for implementing DC-to-AC, AC-to-DC, AC-to-AC, and DC-to-DC power conversion. The Z-source converter employs a unique impedance network (or circuit) to couple the converter main circuit to the power source, thus providing unique features that cannot be obtained in the traditional voltage-source (or voltage-fed) and current-source (or current-fed) converters where a capacitor and inductor are used, respectively. The Z-source converter overcomes the conceptual and theoretical barriers and limitations of the traditional voltage-source converter (abbreviated as V-source converter) and current-source converter (abbreviated as I-source converter) and provides a novel power conversion concept. The Z-source concept can be applied to all DC-to-AC, AC-to-DC, AC-to-AC, and DC-to-DC power conversion. To describe the operating principle and control, this paper focuses on an example: a Z-source inverter for DC-AC power conversion needed in fuel cell applications. Simulation and experimental results are presented to demonstrate the new features.