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Current Control of VSI-PWM Inverters

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2 Author(s)
David M. Brod ; Borg-Warner Corporation, Wolf and Algonquin Roads, Des Plaines, IL 60018. ; Donald W. Novotny

The inherent limitations of commanding voltages and currents in a three-phase load with an inverter are examined. An overview of several current controllers described in the literature is presented, and computer simulations are used to compare performance. A switching diagram is developed which reveals some of the operating characteristics of hysteresis controllers. For ramp comparison controllers, a frequency transfer function analysis is used to predict the line currents and provide some insight into the compensation required to reduce the current errors.

Published in:

IEEE Transactions on Industry Applications  (Volume:IA-21 ,  Issue: 3 )