Electricity: measuring and testing – Magnetic – Displacement
Reexamination Certificate
2007-05-22
2007-05-22
Lefkowitz, Edward (Department: 2862)
Electricity: measuring and testing
Magnetic
Displacement
C324S207170, C324S177000
Reexamination Certificate
active
10919484
ABSTRACT:
A method for determining the speed and position of a rotor of a salient-pole permanent magnet synchronous machine, the method comprising the steps of creating a voltage model (41) on a permanent magnet synchronous machine, forming a voltage reference (us,ref) for a stator of the permanent magnet synchronous machine, determining stator currents (is) of the permanent magnet synchronous machine, calculating a rotor angular speed (42) from the voltage reference (us,ref) and the stator currents (is) using the voltage model (41). The method further comprises the steps of forming with signal injection a position tracking signal (ε) of the rotor of the permanent magnet synchronous machine, forming a rotor angular speed estimate ({circumflex over (ω)}m) from the calculated rotor angular speed (42) and the rotor position tracking signal (ε), forming a rotor position angle estimate ({circumflex over (θ)}m) from the formed rotor angular speed estimate ({circumflex over (ω)}m) and the rotor position tracking signal (ε).
REFERENCES:
patent: 5565752 (1996-10-01), Jansen et al.
patent: 5726549 (1998-03-01), Okuno et al.
patent: 5969496 (1999-10-01), Yamada et al.
patent: 6137258 (2000-10-01), Jansen
patent: 6163127 (2000-12-01), Patel et al.
patent: 6492788 (2002-12-01), Agirman et al.
patent: 7045988 (2006-05-01), Ha et al.
patent: 2002/0163319 (2002-11-01), Kaneko et al.
patent: 2003/0015987 (2003-01-01), Cheong et al.
patent: 2003/0057912 (2003-03-01), Iwaji et al.
patent: 2003/0141865 (2003-07-01), Voillat
patent: 1 107 446 (2001-06-01), None
Harnefors, L., et al., A general algorithm for speed and position estimation of ac motors, IEEE Transactions on industrial electronics, vol. 47, No. 1, Feb. 2000, pp. 77-83.
Corley, M., et al., Rotor Position and velocity estimation for a salient-pole permanent magnet synchronous machine at standstill and high speeds, IEEE Transactions in industry applications, vol. 34, No. 4, Jul./Aug. 1998.
Ohtani, T. et al., Vector Control of Induction Motor Without Shaft Encoder; IEEE Transactions on Industry Applications, vol. 28, No. 1, Jan./Feb. 1992, s. 157-164.
T. Aihara, A. Toba and T. Yanase. “Sensor-less Torque Control of Salient-Pole Synchronous Motor at Zero Speed Operation,” IEEE, vol. 2, pp. 715-720, Feb. 1997.
ABB OY
Dykema Gossett PLLC
Whittington Kenneth J.
LandOfFree
Method in salient-pole permanent magnet synchronous machine does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method in salient-pole permanent magnet synchronous machine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method in salient-pole permanent magnet synchronous machine will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3775054