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:
Mar. 07, 2000
Filed:
Jun. 16, 1998
Roger Buhler, Le Locle, CH;
Asulab S.A., Bienne, CH;
Abstract
The invention concerns a method for controlling a continuous rotation miniature motor including a rotor carrying permanent magnets and a stator carrying at least one coil in which an alternating induced voltage is generated when the rotor rotates, this method consisting in maintaining the rotation of said rotor by successive pulses (102) supplied, in respective half periods of the induced voltage (U.sub.i), before the induced voltage reaches a maximum absolute value in each of these half periods. In particular, the time interval (t.sub.1) between a passage through zero of the induced voltage and the beginning of a maintenance pulse (102), provided in the half period following said passage through zero, is constant.