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. 24, 2002
Filed:
Sep. 06, 2000
Nady Boules, Troy, MI (US);
Rassem Ragheb Henry, Clinton Township, MI (US);
Chandra Sekhar Namuduri, Troy, MI (US);
Thomas Wolfgang Nehl, Shelby Township, MI (US);
Bruno Patrice Bernard, Lequesne, MI (US);
Shaotang Chen, Troy, MI (US);
Delphi Technologies, Inc., Troy, MI (US);
Abstract
Disclosed is an electric motor system with reduced torque ripple comprising a sinusoidally magnetized permanent magnet, a sinusoidal inverter, a higher resolution position sensor, a composite iron stator yoke, a composite reinforced plastic rotor core and shaft; and a high gear ratio gear reduction box. The novel combination of magnet, inverter, sensor, plastic rotor core and shaft and high gear ratio gear box substantially reduces the torque ripple on the shaft of said motor system.