how to calculate the impedance(R,L) of a coil with LABVIEW?

[kufe2001]

I want monitor the change of impedance for a coil.the exciting signal is harmonic voltage.how can I get the value of resistor and inductance of coil by the harmonic current and voltage.could you please tell me the detail operation with LABVIEW fuction modul? thanks.

 

[Driven]

kufe2001- you asked two questions: THe first one I can answer partly but not the second, I don'r have experience with LabView. The first question relating harmonic impedance: You can run simply tests, a dc step test on a coil and determine it's dc resistance. Using that as a base, you can work out the ac resistances, using a formula. THese kind of formulas can be found from theory on cables and transmission lines. I hope that will shed some light.
Driven

 

[jbartos]

Suggestions:
1. To monitor the coil impedance, any impedance meter will do. Some of them use a suitable bridge to measure impedance.
2. LABVIEW Tech Support or perhaps the User's Manual are meant for the detail application of LABVIEW.
3. Check for example:

http://www.ltrpub.com/

http://iride.unipv.it/research/papers/98tr-dataflow/usabilit.htm

http://sine.ni.com/apps/we/nioc.vp?cid=1381&lang=US

etc.