High-Power Machine Drive, Using Nonredundant 27-Level Inverters and Active Front End Rectifiers

• Published in: IEEE transactions on power electronics 2007-11, Vol.22 (6), p.2527-2533
• Main Authors: Dixon, J., Breton, A.A., Rios, F.E., Rodriguez, J., Pontt, J., Perez, M.A.
• Format: Article
• Language: English
• Subjects: Active control; Applied sciences; Circuit properties; Control systems; Converters; Convertors; Digital signal processing; Digital signal processors; Diodes; Direct current; Electric currents; Electric, optical and optoelectronic circuits; Electrical engineering. Electrical power engineering; Electrical machines; Electronic circuits; Electronic equipment and fabrication. Passive components, printed wiring boards, connectics; Electronics; Exact sciences and technology; Harmonic distortion; High-power applications; Inverters; Motors; multilevel inverters; power drives; Power electronics, power supplies; Power supplies; Reactive power; Rectifiers; Signal convertors; Simulation; Topology; Transformers; Virtual prototyping
• ISSN: 0885-8993; 1941-0107
• DOI: 10.1109/TPEL.2007.909276

A nonredundant 27-level inverter using ldquoHrdquo converters is being analyzed for high power machine drive applications. The main advantage of this kind of converter is the minimum harmonic distortion obtained at the machine side. The drawbacks are the large number of isolated dc power supplies required for each one of the three stages of the multistage converter. In this paper this problem has been overcome in two ways: 1) by using independent windings for each phase of the motor and 2) by using independent input transformers. Special configurations and combinations of diode rectifiers and active front end rectifiers for one of the stages of the drive are used to eliminate input harmonics. The topology can also keep high power factor at the input terminals. Simulation results are shown and some experiments with small three-stage prototype are displayed. The control of this multiconverter is being implemented using DSP controllers, which give flexibility to the system.