Electricity: motive power systems – Synchronous motor systems – Brushless motor closed-loop control
Reexamination Certificate
2008-07-15
2011-10-18
Masih, Karen (Department: 2837)
Electricity: motive power systems
Synchronous motor systems
Brushless motor closed-loop control
C318S400340, C318S400130
Reexamination Certificate
active
08040095
ABSTRACT:
The method of synchronizing sequential phase switchings in driving stator windings of a multiphase sensorless brushless motor with a reconstructed information on the current angular position of a permanent magnet rotor, includes sampling on a currently non-conductive stator winding a voltage induced thereon by the resultant magnetic field produced by the drive current forced through currently conductive stator windings that inverts its sign when the rotor transitions across a plurality of significant angular positions, at which orthogonality between the resultant magnetic field and a magnetic axis of the non-excited winding verifies. The sign of the sampled voltage induced on the currently non-excited winding is compared with the sign that is expected upon transiting across the angular position of inversion by the moving rotor for the current phase drive configuration to sequentially switch to the next phase drive configuration upon verifying conformity of the sign of the sampled voltage with the expected sign.
REFERENCES:
patent: 4928043 (1990-05-01), Plunkett
patent: 6420847 (2002-07-01), Galbiati et al.
patent: 6555977 (2003-04-01), Du et al.
patent: 6841903 (2005-01-01), Boscolo et al.
Allen Dyer Doppelt Milbrath & Gilchrist, P.A.
Jorgenson Lisa K.
Masih Karen
STMicroelectronics S.R.L.
LandOfFree
Synchronization of sequential phase switchings in driving... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Synchronization of sequential phase switchings in driving..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Synchronization of sequential phase switchings in driving... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4253202