Abstract: In order to improve an electrical supply network for on-board electrical systems of vehicles, comprising at least one network system with a current feed-in connection, with at least one load connection and with a supply line system which is guided from the current feed-in connection to the at least one load connection and has at least one current-carrying line harness and at least one protective casing surrounding this, in such a manner that an electric arc can either be avoided or when an electric arc is formed this can be terminated again as quickly as possible, it is suggested that the supply line system be provided with a detector line system which is connected at a first end to a detector circuit and is connected at at least one additional end to an end element, that the detector circuit generate a test signal which is influenced in the defect-free state by the detector line system and the end element and that the detector circuit detect a defect due to deviation of the test signal from a reference value

Abstract: In order to improve an electrical supply network for on-board electrical systems of vehicles, comprising at least one network system with a current feed-in connection, with at least one load connection and with a supply line system which is guided from the current feed-in connection to the at least one load connection and has at least one current-carrying line harness and at least one protective casing surrounding this, in such a manner that an electric arc can either be avoided or when an electric arc is formed this can be terminated again as quickly as possible, it is suggested that the supply line system be provided with a detector line system which is connected at a first end to a detector circuit and is connected at at least one additional end to an end element, that the detector circuit generate a test signal which is influenced in the defect-free state by the detector line system and the end element and that the detector circuit detect a defect due to deviation of the test signal from a reference value

Abstract: In order to improve a control device for operating a load circuit having at least one electric motor, this control device comprising a control stage which generates a pulse width modulated control signal, a power stage supplying the load circuit and having an electronic switch activated by the pulse width modulated control signal, a freewheeling element connected in parallel to the load circuit and a blocking monitoring means which generates a measurement switch-off interval by suppressing at least one switch-on interval of the pulse width modulated control signal, monitors the voltage in the load circuit during the measurement switch-off interval, compares it to a limit value and generates a blocking state signal in accordance with the comparison, in such a manner that a differentiated analysis of the voltages occurring in the measurement switch-off interval is possible it is suggested that for monitoring at least two electric motors connected in parallel in the load circuit the blocking monitoring means car

Abstract: In order to improve a control device for operating a load circuit having at least one electric motor, this control device comprising a control stage which generates a pulse width modulated control signal, a power stage supplying the load circuit and having an electronic switch activated by the pulse width modulated control signal, a freewheeling element connected in parallel to the load circuit and a blocking monitoring means which generates a measurement switch-off interval by suppressing at least one switch-on interval of the pulse width modulated control signal, monitors the voltage in the load circuit during the measurement switch-off interval, compares it to a limit value and generates a blocking state signal in accordance with the comparison, in such a manner that a differentiated analysis of the voltages occurring in the measurement switch-off interval is possible it is suggested that for monitoring at least two electric motors connected in parallel in the load circuit the blocking monitoring means car

Abstract: The present invention provides a fan installation for a cooling system of a motor vehicle, comprising at least two fans which respectively have an electric fan motor arranged in a separate housing and a fan wheel which can be driven by the fan motor. The fan installation also comprises a control unit for operating the fan motors. The invention provides for an improved fan installation with a simple and cost-effective design, which is achieved by arranging the control unit in the housing of one of the fans for operating both fan motors.

Abstract: The present invention provides a fan installation for a cooling system of a motor vehicle, comprising at least two fans which respectively have an electric fan motor arranged in a separate housing and a fan wheel which can be driven by the fan motor. The fan installation also comprises a control unit for operating the fan motors. The invention provides for an improved fan installation with a simple and cost-effective design, which is achieved by arranging the control unit in the housing of one of the fans for operating both fan motors.