Unbalanced load detection system and method for a household appl

Details Unbalanced load detection system and method for a household appl Unbalanced load detection system and method for a household appl

1989-04-17

1991-12-10

Stinson, Frankie L.

Bleaching and dyeing; fluid treatment and chemical modification

Fluid treatment

Manipulation of liquid

68 13R, 68 1216, 68 231, D06C 3302

Patent

active

050705652

ABSTRACT:
Load unbalance in an inverter driven washing machine is detected by examining the ripple in the DC inverter bus current. Ripple above a predetermined level is indicative of load unbalance. If the ripple indicates the load is unbalanced, the distribution cycle of the washing machine is attempted again in an attempt to more nearly balance the clothes. After a certain number of tries, if the load is still unbalanced the spin cycle is aborted. If the ripple falls below a predetermined level before the maximum number of tries is reached, the spin cycle is started. The frequency of operation is checked during the spin cycle to adjust the cycle time to the particular degree of load balance achieved.

REFERENCES:
patent: 3152462 (1964-10-01), Elliott et al.
patent: 3422957 (1969-01-01), Fosler
patent: 3674419 (1972-07-01), Tichy
patent: 4411664 (1983-10-01), Rickard et al.
patent: 4517695 (1985-05-01), Hoffmann et al.
patent: 4677291 (1987-06-01), Ellingson
patent: 4765161 (1988-08-01), Williamson

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