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. 07, 2002
Filed:
May. 23, 2000
Applicant:
Inventors:
Alan P. French, Powell, OH (US);
John S. Thorn, Florissant, MO (US);
Assignee:
Emerson Electric Co., St. Louis, MO (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D06F 3/302 ;
U.S. Cl.
CPC ...
D06F 3/302 ;
Abstract
A system and method for controlling the rotation speed of a washing machine tub includes receiving an indication of the actual tub rotation speed and comparing the actual tub rotation speed to a set point speed to calculate a speed error. One or more gain factors are applied to the speed error to calculate a correction factor. Adaptive gain control is used, wherein the gain factors are adjusted in response to system parameters, including the actual or desired tub rotation speed, speed error, average torque demand, average power, etc.