Analysis and Exploitation of the Star-Point Voltage of Synchronous Machines for Sensorless Operation

Emanuele Grasso, Riccardo Mandriota, Niklas König and Matthias Nienhaus
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Emanuele Grasso: Laboratory of Actuation Technology, Saarland University, 66123 Saarbrücken, Germany
Riccardo Mandriota: Laboratory of Actuation Technology, Saarland University, 66123 Saarbrücken, Germany
Niklas König: Laboratory of Actuation Technology, Saarland University, 66123 Saarbrücken, Germany
Matthias Nienhaus: Laboratory of Actuation Technology, Saarland University, 66123 Saarbrücken, Germany

Energies, 2019, vol. 12, issue 24, 1-21

Abstract: In the field of sensorless drive of synchronous machines (SMs), many techniques have been proposed that can be applied successfully in most applications. Nevertheless, these techniques rely on the measurement of the phase currents to extract the rotor position information. In the particular case of low-power machines, the application of such techniques is challenging due to the limited bandwidth of the available current sensors. An alternative is offered by those techniques that exploit the star-point voltage rather than phase currents. This work aims at providing a model of the dynamic behavior of the star-point voltage and presenting a technique for extracting the rotor electrical position needed for sensorless operation of SMs. Two different circuitries for measuring the star-point voltage are also presented and then compared. The presented mathematical analysis and the measurement methods are validated both numerically and experimentally on a test machine.

Keywords: AC machines; motor modeling; sensorless control; sensorless drive; synchronous machines (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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