Patent ID: 7948115
Filing Date: 2011-05-24
Classification: D06F,G01R,G05B

Abstract:
1. A controller controlling a domestic appliance, said domestic appliance comprising a power circuit having: 1) electrical loads which are operated by a mains AC voltage, 2) switching means which are configured to be actuated by the controller, wherein each electrical load is associated with a corresponding one of the switching means configured to either connect or disconnect its respective electrical load to one pole of the mains AC voltage as a function of a switching state of the switching means, 3) at least one central switching means configured to be actuated by the controller to connect or disconnect all the electrical loads to another pole of the mains AC voltage as a function of the switching state of said central switching means, and 4) a first evaluation node and a second evaluation node, said first evaluation node connected to said another pole of the mains AC voltage; said controller comprising: a monitoring device comprising: a first monitoring connection connected to the first evaluation node and a second monitoring connection connected to the second evaluation node; and an evaluation device adapted to determine the phase angle of the mains AC voltage by evaluating a first signal at the first monitoring connection, said evaluation device adapted to measure a second signal at the second monitoring connection synchronously with a defined phase angle of the mains AC voltage, and adapted to determine the correct functioning of the domestic appliance as a function of said defined phase angle and the measured second signal at the second monitoring connection.