Continue to Site

Welcome to our site!

Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

  • Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

Coil Capacitance Test

Status
Not open for further replies.

codan

New Member
Hi All,

I am trying to test Coil Capacitance but i am not really sure how to do this correctly.

Will this work?
If i connect a coil to a one shot circuit & watch the decay curve times of the Coils on an O-scope i guess this will show coil capacitance of one coil compared to another--is this correct?

My DMM has a Capacitance setting on it for Capacitors--can this be used for Coils?

Thanks
 
Capacitors have capacitance.

Coils (inductors) have inductance.

So no, the capacitance range of your meter will not measure inductance.

However, coils do have some small value of capacitance which will resonate with the inductance of the coil to give the self resonant frequency.
I suspect that this is not really what you are asking, or is it?

JimB
 
Hi All,

I am trying to test Coil Capacitance but i am not really sure how to do this correctly.

Will this work?
If i connect a coil to a one shot circuit & watch the decay curve times of the Coils on an O-scope i guess this will show coil capacitance of one coil compared to another--is this correct?

My DMM has a Capacitance setting on it for Capacitors--can this be used for Coils?

Thanks

Assuming you do want to test for Interwire Capacitance in a Coil, Here is a Method that I developed to do this.

**broken link removed**
 
Every conductor (and free space, and well really everything) has both capacitance and inductance inherent which cannot be made zero. This means that your coil while being mostly an inductor has a small bit of parasitic capacitance. To find out what it is,

pulse your coil with a sharp square wave.

Record the frequency of the subsequent "ring"

Get the equation for "LC" or "Tank" resonance

Input the variables of frequency, and inductance, and solve for capacitance.

Hope this helps!
 
Status
Not open for further replies.

Latest threads

New Articles From Microcontroller Tips

Back
Top