Washing machine

Details Washing machine Washing machine

1998-08-24

2000-12-26

Stinson, Frankie L.

Bleaching and dyeing; fluid treatment and chemical modification

Fluid treatment

Manipulation of liquid

68 1216, D06F 3304

Patent

active

061639125

ABSTRACT:
A torque current component and an exciting current component of primary AC currents which are supplied to a stator of a three-phase induction motor are commanded independently of each other in accordance with a command rotational angular velocity and a rotational angular velocity of the three-phase induction motor rotating an agitator, and the rotational angular velocity of the three-phase induction motor is controlled by changing the magnitude and frequency of each of the primary AC currents. Furthermore, a test operation is carried out by giving the command angular velocity so as to make constant the angular velocity of the motor, and the laundry amount is estimated corresponding to an output torque of the motor in the test operation.

REFERENCES:
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patent: 4986092 (1991-01-01), Sood et al.
patent: 5146146 (1992-09-01), Samann
patent: 5677606 (1997-10-01), Otake
patent: 5701066 (1997-12-01), Matsuura et al.
patent: 5734250 (1998-03-01), Lindmark

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