METHOD FOR MONITORING THE ELECTRICAL PROPERTIES OF A LOAD CIRCUIT CONTROLLED IN A CLOCKED MANNER AND CIRCUIT SYSTEM FOR PERFORMING THE METHOD
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Abstract
A method and a circuit system for monitoring the electrical properties of a load circuit controlled in a clocked manner, the load circuit having at least one ohmic component and at least one inductive component, having the following steps: establishing at least one first control signal and one second control signal, the control signals being established in such a way that, in the case of activation of the load circuit using the first control signal, the inductive behavior of the load circuit predominates and, in the case of activation of the load circuit using the second control signal, the ohmic behavior of the load circuit predominates, acquiring at least one measured variable, which is a function of the control signal and the ohmic and/or inductive components, in the case of activation of the load circuit using the first control signal and in the case of activation of the load circuit using the second control signal, ascertaining the deviations of the measured variables from measured variables which are expected on the basis of the nominal values of the inductive and ohmic components, classifying the state of the load circuit on the basis of the ascertained deviations.
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Citations
26 Claims
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1-13. -13. (canceled)
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14. A method for monitoring electrical properties of a load circuit controlled in a clocked manner, the load circuit having at least one ohmic component and at least one inductive component, the method comprising:
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establishing at least one first control signal and one second control signal, the first control signal and the second control signal being established in such a way that, in a case of activation of the load circuit using the first control signal, an inductive behavior of the load circuit predominates, and, in a case of activation of the load circuit using the second control signal, an ohmic behavior of the load circuit predominates; acquiring at least one measured variable, which is a function of a control signal and at least one of the ohmic and inductive components, in the case of activation of the load circuit using the first control signal, and in the case of activation of the load circuit using the second control signal; ascertaining deviations of the measured variables from measured variables which are expected on a basis of nominal values of the ohmic and inductive ohmic components; and classifying a state of the load circuit based on the ascertained deviations. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A circuit system for monitoring electrical properties of a load circuit controlled in a clocked manner, the load circuit including at least one switch and at least one inductive load, the circuit system comprising:
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a control unit to control the switch; and a measuring unit for acquiring and analyzing measured variables; wherein the circuit system is configured to perform a monitoring method, the monitoring method including the steps of; establishing at least one first control signal and one second control signal, the first control signal and the second control signal being established in such a way that, in a case of activation of the load circuit using the first control signal, an inductive behavior of the load circuit predominates, and, in a case of activation of the load circuit using the second control signal, an ohmic behavior of the load circuit predominates; acquiring at least one measured variable, which is a function of a control signal and at least one of the ohmic and inductive components, in the case of activation of the load circuit using the first control signal, and in the case of activation of the load circuit using the second control signal; ascertaining deviations of the measured variables from measured variables which are expected on a basis of nominal values of the ohmic and inductive ohmic components; and classifying a state of the load circuit based on the ascertained deviations.
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Specification