How can I measure the shunt capacitance of an inductor?

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SUMMARY

This discussion focuses on measuring the shunt capacitance of an axial inductor using an LCR meter and alternative methods. It is established that a quality LCR meter can measure inductance, capacitance, and resistance simultaneously. Additionally, a Digital Multimeter (DMM) combined with a Vector Impedance Meter can effectively characterize the inductor's LCR values by varying the frequency until capacitive behavior is observed, allowing for capacitance deduction.

PREREQUISITES
  • Understanding of LCR meters and their functionality
  • Familiarity with Digital Multimeters (DMM)
  • Knowledge of Vector Impedance Meter usage
  • Basic principles of inductance and capacitance
NEXT STEPS
  • Research how to use an LCR meter for measuring inductance and capacitance
  • Learn about the operation of Digital Multimeters (DMM) in circuit analysis
  • Explore the principles of Vector Impedance Measurement
  • Study the effects of frequency on inductor behavior and capacitance measurement
USEFUL FOR

Electronics engineers, technicians, and hobbyists involved in inductor characterization and measurement techniques.

dnyberg2
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I know that the there is some small capacitance between the windings of an axial inductor let's say, but how does one measure this? The inductor is a short on an LCR meter...
 
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dnyberg2 said:
I know that the there is some small capacitance between the windings of an axial inductor let's say, but how does one measure this? The inductor is a short on an LCR meter...

An inductor is not a short on an LCR meter. If the meter is any good, it should be able to measure all 3 quantities for a real-world inductor. What meter are you using, and what value of inductor are you trying to measure?

You can also use a DMM + Vector Impedance Meter to characterize the inductor's LCR values.
 
Increase the frequency until the coil is capacitive. From the frequency where the behaviour changes, you can deduce the capacitance - provided the inductance stays constant, far from granted.
 

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