Apparatus and method for controlling motor in washing machine

Details Apparatus and method for controlling motor in washing machine Apparatus and method for controlling motor in washing machine

2007-06-12

2007-06-12

Ip, Paul (Department: 2837)

Electricity: motive power systems

Plural, diverse or diversely controlled electric motors

Running-speed control

C318S800000, C318S807000, C318S434000, C008S159000

Reexamination Certificate

active

11176298

ABSTRACT:
An apparatus for controlling a motor in a washing machine, which includes a speed sensor for measuring speed of the motor, and a controller that compares the measured speed with a target speed to estimate a motor power applied to the motor, adjusts a running rate of the motor according to the comparison, and controls the motor according to the adjusted running rate. The motor power is estimated based on the motor speed, and the running rate is adjusted down if the estimated motor power is too high, thereby preventing overheating of the motor and an inverter, which may be caused in wash or rinse cycles. The apparatus can be implemented without using a temperature sensor, thereby reducing economic burden. Further, the motor does not stop due to an increase in the temperature of the motor, thereby preventing an unnecessary increase in the time required to complete washing.

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EP 05 254206 Search Report Nov. 20, 2006.

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