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Sigma-delta modulation (SDM) technique, well known in the telecommunication industry, has recently shown its feasibility in conventional three phase power converters. In this paper, the SDM method is extended for the voltage modulation of multiphase power converters. Experimental results are presented to show the viability of SDM technique in an asymmetrical dual three-phase AC machine, comparing...
Sigma-Delta Modulation (SDM) technique, well known in the telecommunication industry, has recently shown its feasibility in power converters. In this paper, the application of SDM for the voltage modulation in multiphase drives is analyzed. Simulation results compare SDM with other advanced modulation techniques, like the Space Vector Modulation method, and confirm its viability in an asymmetrical...
One of the advantages of multi-phase machine variable-speed drives is the possibility of disturbance-free mode of operation when one or more phases are lost during normal operation. This requires the modification of the control algorithm in post-fault operation. This paper investigates the use of multidimensional space vector PWM technique to synthesise required voltages for the disturbance-free mode...
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