US Patent 7752694 Dehydration controlling apparatus for washing machine and method thereof

A dehydration controlling apparatus for a washing machine, and a method thereof. The apparatus including: a storage unit in which an acceleration rate, an allowable maximum unbalance amount and an allowable minimum unbalance amount according to an amount of laundry are pre-stored; and a controlling unit for repeatedly controlling an operation of increasing and decreasing a Rotation Per Minute (RPM) of a motor of the washing machine in a region between the acceptable maximum unbalance amount and the acceptable minimum unbalance amount until an unbalance amount detected is less than the acceptable minimum unbalance amount.