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The paper is dedicated to the development of the novel energy saving speed adjustable AC drive with two-stage direct frequency converter (TSDFC) which provides sinusoidal input/output currents and recuperation. Paper describes the two-step control strategy based on the analysis of the TSDFC properties and the problem decomposition. This strategy was realised in the 7.5 kW laboratory setup and first...
The paper is dedicated to the problem of direct frequency converter (DFC) control in AC electric drive system. The general two-step control strategy based on the coordinate PWM is presented. The developed DFC control system provides converter output voltages and input currents parameters equal to their reference values. The control system synthesis, taking into account a distorting influence of real...
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