Temperature sensing system for switching device
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United States of America Patent
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Jun 12, 2018
Issued Date -
Mar 24, 2016
app pub date -
Dec 11, 2014
filing date -
Sep 22, 2014
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Abstract
A temperature sensing system for a switching device is provided The temperature sensing system includes a sensing device that is configured to sense a temperature of the switching device and a signal converter that is configured to output a digital signal having a frequency based on a voltage across the sensing device by a frequency variable method which receives the voltage across the sensing device which is a temperature sensing value when a current flows in the sensing device to convert a level of an analog signal into a frequency of the digital signal. An isolator is configured to be connected to an output terminal of the signal converter to isolate and transmit the digital signal output from the signal converter. The system also includes a controller configured to recognize the temperature from the frequency of the digital signal transmitted through the isolator.
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