Why switch in the attached simulink file not working?

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Raghuraman S 2018-10-2

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回答： Sebastian Castro 2018-10-3

switch_not_working.png

I have constructed a circuit using switch block and threshold value is 4. When the signal applied is 1, still the switch is showing in closed condition and outputs the voltage. I expected switch to open since thershold value(4) is more than signal value(1),I tried changing the signal value but always the switch is in closed condition.

Please see the attached file. (Unfortunately the question box is not allowing to upload .slx file).

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Answer 1

Sebastian Castro 2018-10-3

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This seems right. The open switch behaves as a large resistor, so voltage should be (almost) the same as the DC voltage supply, but current should be (almost) zero.

I believe if you measure the current it will be significantly different based on the switch input signal.

- Sebastian