Diagnostic adaptor module for a domestic appliance

Details Diagnostic adaptor module for a domestic appliance Diagnostic adaptor module for a domestic appliance

G - Physics

01

R

G01R 11/02 (2006.01) G01R 31/28 (2006.01)

Patent

CA 2086469

PA-5811-O-EL ABSTRACT OF THE DISCLOSURE A diagnostic adaptor module disposed between an appliance and the electrical service having a ferrite toroid sensor which surrounds a wire carrying the main current to the appliance, a sense winding threaded through the toroid, and a microcomputer that monitors the time between corresponding pairs of alternating polarity voltage and current zero crossings, the electrical phase lag of the appliance current, at a rate of two samples per each line cycle whenever at least one major electrical component such as a drive motor or heater is energized. The microcomputer includes software to interpret the phase lag information to determine the operating state of the appliance, and/or detect default conditions as compared to known predefined operation and to support a serial/parallel data interface to the outside world. Depending on the manner in which the adaptor module is being used, serial data may be generated to provide warranty and diagnostic information for appliance maintenance or repair, operational information available to the user, and/or crisis information for a host system capable of deactivating the circuit to which the appliance is connected. 34

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