1. (1) M. Schrödl: “Sensorless Control of AC Machines at Low Speed and Standstill Based on the INFORM Method”, IEEE IAS Annual Meeting, San Diego, USA, Vol. 1 pp. 270-277 (1996)
2. (2) J. Ha and S. Sul: “Sensorless Field Orientation Control of an Induction Machine by High Frequency Signal Injection”, IEEE Trans. Ind. Appl., Vol. 35, No. 1, pp. 45-51 (1999)
3. (3) J. Holtz: “Sensorless Position Control of Induction Motors—An Emerging Technology”, IEEE Trans. Ind. Electron., Vol. 45, No. 6, pp. 840-852 (1998)
4. (4) P. L. Jansen and R. D. Lorenz: “Transducerless Position and Velocity Estimation in Induction and Salient AC Machines”, IEEE Trans. Ind. Appl., Vol. 31, No. 2, pp. 240-247 (1995)
5. (5) P. L. Jansen and R. D. Lorenz: “Transducerless Field Orientation Concepts Employing Saturation Induced Saliencies in Induction Machines”, IEEE IAS Annual Meeting, Vol. 1, pp. 174-181 (1995)