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Principle of a Dual Current Source Converter for AC Motor Drives

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3 Author(s)
Palaniappan, Rasappa ; Department of Electrical Engineering, Indian Institute of Science, Bangalore 560012, India. ; Vithayathil, Joseph ; Datta, Samir K.

The principle of operation of a dual current source converter is briefly explained. The combination of two single current source converters (SCSC) to form a ``dual (duplex) current source converter'' (DCSC) is proposed. The DCSC is shown to have the following merits: 1) it retains all the advantages of the SCSC; 2) it reduces the harmonic content of the current waveform considerably; and 3) since the load current is shared equally between two current source converters, ratings of the individual components employed in the circuit are considerably lowered. A DCSC can be an attractive choice for sophisticated large horsepower drives where a good performance of the drive rather than cost is a prime factor. An open-loop control scheme employing the DCSC for an ac motor drive has been successfully implemented in the laboratory. Oscillograms of the improved load current waveforms are shown.

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Industry Applications, IEEE Transactions on  (Volume:IA-15 ,  Issue: 4 )