H - Electricity – 02 – P
Patent
H - Electricity
02
P
318/108, 342/21
H02P 23/00 (2006.01) F25B 49/00 (2006.01) G01R 31/28 (2006.01) G01R 31/34 (2006.01) H02P 1/40 (2006.01) H02P 25/04 (2006.01)
Patent
CA 1220840
PA-5134-0-AW-USA ELECTRONIC CONTROL FOR A DOMESTIC APPLIANCE ABSTRACT OF THE DISCLOSURE An automatic control for various domestic appliances has a ferrite core which surrounds the run winding for the drive motor of the appliance. The run winding represents the primary winding for the ferrite core, which has a second- ary winding at which a brief output voltage is generated whenever the run winding current changes direction. This sensor in combination with a voltage zero detector circuit and post-connected logic circuitry generates a voltage pulse and a phase pulse which are respectively related to the voltage level of the drive motor and the motor output torque which is required to operate a movable member in the appliance. A microcomputer is utilized to generate a representative digital phase number which corresponds to the torque expended in the appliance. The phase number is utilized in various programs of the microcomputer for auto- matically controlling various functions of the appliance as well as other events in an operational sequence upon the attainment of selected torque levels.
428205
Corporation Whirlpool
Kirby Eades Gale Baker
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