Sensorless Control of Induction Motor Drives Equipped With Inverter Output Filter
Salomaki, J.
Hinkkanen, M.
Luomi, J.
Power Electron. Lab., Helsinki Univ. of Technol., Espoo;
This paper appears in: Industrial Electronics, IEEE Transactions on
Publication Date: June 2006
Volume: 53,
Issue: 4
On page(s): 1188-1197
ISSN: 0278-0046
INSPEC Accession Number: 9064496
Digital Object Identifier: 10.1109/TIE.2006.878314
Current Version Published: 2006-08-07
Abstract
This paper deals with the speed sensorless vector control of an induction motor in a special case where the output voltage of the pulsewidth-modulated inverter is filtered by an inductance-capacitance (LC) filter. The system states are estimated by means of an adaptive full-order observer, and no additional voltage, current, or speed measurements are needed. The rotor speed adaptation is based on the estimation error of the inverter output current. Quasi-steady-state and linearization analyses are used to design an observer that enables a wide operation region, including very low and very high speeds. A torque-maximizing control method is applied in the field-weakening region. Simulation and experimental results show that the performance is comparable to that of a drive without the LC filter
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