Title:
WASHING MACHINE TUB SPEED CONTROL METHOD AND APPARATUS
Document Type and Number:
WIPO Patent Application WO2001090472
Kind Code:
A3
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.
Inventors:
FRENCH ALAN P
THORN JOHN S
THORN JOHN S
Application Number:
PCT/US2001/016395
Publication Date:
May 02, 2002
Filing Date:
May 22, 2001
Export Citation:
Assignee:
EMERSON ELECTRIC CO (US)
International Classes:
D06F33/48; D06F37/20; D06F49/04; D06F34/16; (IPC1-7): D06F37/30
Foreign References:
| EP0653832A2 | 1995-05-17 | |||
| EP0523371A1 | 1993-01-20 | |||
| DE19629359A1 | 1998-01-22 | |||
| EP0354095A1 | 1990-02-07 |
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