Control device for brushless motor and washing machine...

Details Control device for brushless motor and washing machine... Control device for brushless motor and washing machine...

2006-12-19

2006-12-19

Stinson, Frankie L. (Department: 1746)

Textiles: fluid treating apparatus

Machines

Single tub and automatic sequential operation mechanism

C068S012060, C068S140000

Reexamination Certificate

active

07150167

ABSTRACT:
A device for controlling a brushless motor including an inverter for supplying a.c. electric power to the motor, and a drive control circuit for controlling the inverter. The control circuit includes a load weight detecting circuit for detecting the load weight acting on the motor, a circuit for preparing a driving signal, and a circuit for preparing a PWM signal based on the driving signal. The driving signal preparing circuit derives from the load weight detected a phase reference value to give a phase difference of up to 90 degrees between the braking voltage to be applied to the motor and the current of the motor, and prepares the based on the phase reference value.

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patent: 5723968 (1998-03-01), Sakurai
patent: 6542390 (2003-04-01), Bixel
patent: 2002/0057069 (2002-05-01), Kushida
patent: 11-275889 (1999-10-01), None
patent: 2001-46777 (2001-02-01), None

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