Patent ID: 6023107
Filing Date: 2000-02-08
Classification: B60S,H02H

Abstract:
A circuit arrangement for actuating a wiper motor (10) for windshield wiper arrangements with a time-dependent and temperature-dependent load monitoring, said circuit arrangement comprising: a wiper motor (10) that can be actuated via a semiconductor power switching element (13) that is controlled by a control unit that is responsive to a signal from a means (22) for detecting the parking position of a wiper lever and produces a thereon dependent control signal with time dependent monitoring of the power switching element (13); circuit means for monitoring a chip temperature of at least the semiconductor chip of the power switching element and for shutting down the power switching element (13) when a temperature above a given temperature is detected; and wherein, in order to protect the wiper motor (10) against an overload and blocking, the control unit responds to a time-dependent load monitoring signal provided by the means for indicating the parking position when the chip temperature monitoring means responds, and shuts down the wiper motor (10) completely.