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:
May. 25, 2004
Filed:
Sep. 26, 2002
S.N.R. Roulements, Annecy Cedex, FR;
Abstract
The invention relates to an electronically commutated motor ( ) comprising P phases and N pairs of poles, in which a circular multipole encoder ( ) is associated with the rotating ring ( ) of an anti-friction bearing ( ), said encoder ( ) comprising a main multipole track ( ) and a multipole commutation track ( ) comprising 2*P*N singularities ( ) equidistributed angularly and a control device comprising a fixed sensor ( ) capable of delivering square digital signals A, B in quadrature and a digital signal C in the form of 2*P*N pulses per revolution of the encoder ( ), a circuit for commutating ( ) the currents in the phase windings of the motor ( ) and a control circuit ( ) for the commutation circuit ( ).