Solid state electronic switch for motor vehicles
First Claim
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1. Apparatus for selectably energizing a power consuming device with an electrical current signal from an electrical power source in response to a command signal presented thereto, comprising:
- gated switch means, having a first terminal connected to the power source and a second terminal connected to the power consuming device, for conducting the electrical current signal therebetween in the presence of a gate signal presented to a gate input thereof, and for not conducting the current signal therebetween in the absence of said gate signal;
reference signal source means for providing, in the presence of the command signal, a time variant signal representative of reference current signal magnitudes for each of a plurality of succeeding time intervals occurring in the presence of the command signal; and
detection means, responsive to said time variant signal and including sensor means for providing sensed signals indicative of the actual magnitude of the electrical current signal, for providing said gate signal to said gate input in each of said time intervals in which said sensed actual current signal magnitude is less than said reference current signal magnitude.
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Abstract
A solid state power switch includes a gated switch for connecting electrical power to a load whenever the actual load current is less than selected current reference values.
29 Citations
10 Claims
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1. Apparatus for selectably energizing a power consuming device with an electrical current signal from an electrical power source in response to a command signal presented thereto, comprising:
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gated switch means, having a first terminal connected to the power source and a second terminal connected to the power consuming device, for conducting the electrical current signal therebetween in the presence of a gate signal presented to a gate input thereof, and for not conducting the current signal therebetween in the absence of said gate signal; reference signal source means for providing, in the presence of the command signal, a time variant signal representative of reference current signal magnitudes for each of a plurality of succeeding time intervals occurring in the presence of the command signal; and detection means, responsive to said time variant signal and including sensor means for providing sensed signals indicative of the actual magnitude of the electrical current signal, for providing said gate signal to said gate input in each of said time intervals in which said sensed actual current signal magnitude is less than said reference current signal magnitude. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification