1. (1) L. Kovudhikulrungsri and T. Koseki: “Precise Speed and Torque Control for AC Transaction Pure Electric Braking System in Low Speed Range”, IEEJ Trans. IA, Vol. 122-D, No. 11, pp. 1027-1033 (2002)
2. (2) H. Kubota and A. Nakamura: “Sensorless IPMSM Drives Based on Pilot-Voltage Supply and Speed Observer”, ICEM (2004)
3. (3) M. Tomita, H. Yamaguchi, S. Doki, and S. Okuma: “Sensorless Rotor-Position Estimation at Standstill of Cylindrical Brushless DC Motors Using Opened Phase Voltage Change Caused by Eddy Currents”, IEEJ Trans. IA, Vol. 117-D, No. 10, pp. 1205-1211 (1997)
4. (4) M. Tomita, H. Yamaguchi, S. Doki, and S. Okuma: “Novel Sensorless Starting and Low Speed Drive of Cylindrical Brushless DC Motor Using Eddy Current with Un-known Load”, IEEJ Trans. IA, Vol. 118-D, No. 4, pp. 450-459 (1998)
5. (5) Y. Iwaji, Y. Kokami, and M. Kurosawa: “Position-sensorless control method at low speed for permanent magnet synchronous motors using induced voltage caused by magnetic saturation”, The 2010 International Power Electronics Conference—ECCE ASIA—, 2238-2243 (2010)