Temperature coefficient
المؤلف:
Stan Gibilisco
المصدر:
Teach Yourself Electricity and Electronics
الجزء والصفحة:
210
29-4-2021
1742
Temperature coefficient
Some capacitors increase in value as the temperature increases. These components have a positive temperature coefficient. Some capacitors’ values get less as the temperature rises; these have negative temperature coefficient. Some capacitors are manufactured so that their values remain constant over a certain temperature range. Within this span of temperatures, such capacitors have zero temperature coefficient. The temperature coefficient is specified in percent per degree Celsius.
Sometimes, a capacitor with a negative temperature coefficient can be connected in series or parallel with a capacitor having a positive temperature coefficient, and the two opposite effects will cancel each other out over a range of temperatures. In other instances, a capacitor with a positive or negative temperature coefficient can be used to cancel out the effect of temperature on other components in a circuit, such as inductors and resistors.
You won’t have to do calculations involving temperature coefficients if you’re in a management position; you can delegate these things to the engineers. If you plan to become an engineer, you’ll most likely have computer software that will perform the calculations for you.
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