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:
Dec. 18, 1984
Filed:
Mar. 18, 1983
Luciano Franzolini, Milan, IT;
SP, EL. s.r.l., , IT;
Abstract
This invention relates to a circuit and to a method for processing amplitude and phase variable multiphase signals, which are required as current or voltage reference to drive electric motors, comprising a synchro-resolver angular position transducer, rigidly connected with a synchronous motor with the same polar configuration and number of poles thereof, according to which the analog signals detected by said transducer are modulated, demodulated and outputted out of phase by 90.degree. with the signals relating to the rotating magnetic field. The circuit moreover comprises a phase shifter device and means for modifying the amplitude of signals out-putted by said transducer as a function of at least one control signal. The resultant of the signals processed by said means is supplied to an amplifier to generate in the stator currents of determined amplitude and phases for driving said motor complying with the magnetic laws thereof.