| US 7,514,887 B2 | ||
| Electrical machine and method of controlling the same | ||
| Paul Steven Mullin, Xenia, Ohio (US); and Brian Thomas Branecky, Oconomowoc, Wis. (US) | ||
| Assigned to A. O. Smith Corporation, Milwaukee, Wis. (US) | ||
| Filed on Apr. 21, 2006, as Appl. No. 11/379,607. | ||
| Application 11/379607 is a continuation in part of application No. PCT/US2004/034938, filed on Oct. 22, 2004. | ||
| Claims priority of provisional application 60/734855, filed on Nov. 09, 2005. | ||
| Claims priority of provisional application 60/514366, filed on Oct. 24, 2003. | ||
| Prior Publication US 2006/0284581 A1, Dec. 21, 2006 | ||
| Int. Cl. H02P 6/22 (2006.01) | ||
| U.S. Cl. 318—400.11 [318/400.09] | 30 Claims |
| 1. A method for controlling an electrical machine having a stator and a rotor, the stator including a core having a plurality
of phase windings disposed on the core, the rotor disposed adjacent to the stator and including a plurality of magnetic poles
such that the rotor is misaligned at an unknown position with respect to the stator, the method comprising:
generating a first moving force to cause rotation of the rotor with respect to the stator from the unknown position;
thereafter generating a first braking force to at least slow rotation of the rotor with respect to the stator;
thereafter generating a second moving force for rotating the rotor with respect to the stator; and
thereafter generating a second braking force for stopping rotation of the rotor at a known position with respect to the stator.
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