Permanent Magnet Motor Control in Full Speed Range Using a Reduced Number of Sensors

G. BISHEIMER; M. O. SONNAILLON; C. H. DE ANGELO; J. A. SOLSONA; G. O. GARCÍA

Rio Cuarto

Workshop; XI Reunión en Procesamiento de la Información y Control, XI RPIC; 2005

Universidad Nacional de Río Cuarto

This paper presents a control method for permanent magnet (PM) motors based on a non? linear full?order observer working in combination with a signal injection scheme. This allows an extended sensorless operating range down to zero speed, using only one voltage and one current sensor in the DC-Link for further cost reduction. In order for the signal injection scheme to work properly, some asymmetry must be present in the motor?s d and q axis inductances. Such asymmetry is also taken into account in the motor model used to construct the observer. The performance of the proposed scheme is shown by computer simulation.