Compensated synchronous PI current controller in overmodulation range and six-step operation of space-vector-modulation-based vector-controlled drives

Overmodulation enhances the power utilization of the installed capacity of a voltage-source inverter. A space-vector strategy is used for constant-switching-frequency inverters. In order to achieve the overmodulation, a modified reference signal with nonuniform angular velocity is generated using a...

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Veröffentlicht in:IEEE transactions on industrial electronics (1982) 2002-06, Vol.49 (3), p.574-580
Hauptverfasser: Khambadkone, A.M., Holtz, J.
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container_title IEEE transactions on industrial electronics (1982)
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creator Khambadkone, A.M.
Holtz, J.
description Overmodulation enhances the power utilization of the installed capacity of a voltage-source inverter. A space-vector strategy is used for constant-switching-frequency inverters. In order to achieve the overmodulation, a modified reference signal with nonuniform angular velocity is generated using a preprocessor. Such a reference wave produces low-frequency harmonics in currents. The presence of current harmonics restricts the bandwidth of the synchronous proportional plus integral current controller in the overmodulation range. A compensating current control is presented to allow for high-bandwidth current control in synchronous coordinates during overmodulation and six-step. The proposed scheme allows for an easy upgrade of a conventional vector control scheme to include overmodulation and, thus, reduce the design-to-market time.
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subjects Angular velocity
Bandwidth
Current control
Harmonics
Inverters
Machine vector control
Mathematical analysis
Power harmonic filters
Pulse modulation
Pulse width modulation
Pulse width modulation inverters
Reference signals
Space vector pulse width modulation
Strategy
Synchronous
Synchronous motors
Vectors (mathematics)
Voltage
title Compensated synchronous PI current controller in overmodulation range and six-step operation of space-vector-modulation-based vector-controlled drives
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