The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 30, 2007
Filed:
Mar. 22, 2004
Bart DE Cock, Wijgmaal, BE;
Jan Plojhar, Mokra-Horakov, CZ;
Lucas Emiel Elie Vander Voorde, Blaasveld, BE;
Bart De Cock, Wijgmaal, BE;
Jan Plojhar, Mokra-Horakov, CZ;
Lucas Emiel Elie Vander Voorde, Blaasveld, BE;
AMI Semiconductor Belgium BVBA, Oudenaarde, BE;
Abstract
A method for detecting rotation of a rotor of a multiple phase motor with bipolar drive is described, excluding a three-phase motor with bipolar drive with star connected coils or motor stator windings. The motor has at least a first and a second energizable motor stator winding. A voltage is sequentially and alternately sensed on the first and the second motor stator winding at or near the end of a period of a non-energised state thereof. An apparatus for detecting rotor speed is also provided.