AC/DC/AC PWM converter with reduced energy storage in the DC link

• Published in: IEEE transactions on industry applications Vol. 31; no. 2; pp. 287 - 292
• Main Authors: Malesani, L., Rossetto, L., Tenti, P., Tomasin, P.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: New York, NY IEEE 01-03-1995; Institute of Electrical and Electronics Engineers
• Subjects: Applied sciences; Bridge circuits; Capacitors; Current supplies; Electrical engineering. Electrical power engineering; Energy storage; Exact sciences and technology; Power electronics, power supplies; Pulse width modulation; Pulse width modulation converters; Switches; Switching circuits; Timing; Voltage control
• ISSN: 0093-9994; 1939-9367
• DOI: 10.1109/28.370275

The paper introduces the family of quasi-direct converters, i.e., forced-commutated AC/DC/AC power converters including small energy storage devices in the DC link. In particular, the case of the three-phase to three-phase quasi-direct power converter is considered. Since energy storage minimization calls for instantaneous input/output power balance, a proper control strategy is needed. The paper describes a simple and effective control technique which also provides high-power factor and small distortion of the supply currents. After a discussion of the general properties of quasi-direct power converters, design criteria of both power and control sections are given, and experimental results of a 2-kVA prototype are reported.< >