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:
Feb. 16, 1999
Filed:
Sep. 05, 1996
Ekkehard Bolte, Aachen, DE;
Jurgen Halfmann, Herzogenrath, DE;
Lutz Scholten, Aachen, DE;
Matthias Wendt, Wurselen, DE;
U.S. Philips Corporation, New York, NY (US);
Abstract
An electrical drive arrangement for an electric motor including a stator having a plurality of phase windings, and a rotor. The drive arrangement includes an electronic commutation circuit to supply electric power to the phase windings of the electric motor, a position sensor device, a phase control circuit coupled to receive the sensor signals and provide resultant sensor signals with a phase shift relative to the phase relationship of the sensor signals, a waveform generator coupled to receive the resultant sensor signals and provide commutation signals, and a control circuit coupled at least to the waveform generator for setting the amplitude and the phase shift of the electric power to be supplied to the motor. The phase control circuit includes a control signal generation circuit, a sensor signal allocation circuit, a delay time determining circuit, a sensor signal output circuit, and a load signal generating circuit. The drive arrangement enables the torque angle, i.e., the phase angle between the magnetic field generated in the stator and the rotor position, to be controlled in dependence upon the movement of the rotor using simple position signals and simple circuitry.