hi all, 😉
in this link low-DCR-coils troels describes how to measure low DCR inductance value.
is this method most reliable and accurate then traditional mesurements ?
which is preferable ?
in this link low-DCR-coils troels describes how to measure low DCR inductance value.
is this method most reliable and accurate then traditional mesurements ?
which is preferable ?
i did not know measuring a coil could be so difficult, such a luck then i always use high resistance coils
Dear diypass,
It is always best to excite the choke at the frequency of interest while measuring its inductance. However, this feature is usually seen only on network analysers or very expensive LCR meters. Using a computer to do the frequency sweep is a nice and low-cost alternative.
The result is usually accurate and usable, as long as the capacitance value is exactly known. However, the LR method (vs. LC) does not use any capacitors. You only need a computer (with sound card) and a multimeter (to read R value).
All the best.
It is always best to excite the choke at the frequency of interest while measuring its inductance. However, this feature is usually seen only on network analysers or very expensive LCR meters. Using a computer to do the frequency sweep is a nice and low-cost alternative.
The result is usually accurate and usable, as long as the capacitance value is exactly known. However, the LR method (vs. LC) does not use any capacitors. You only need a computer (with sound card) and a multimeter (to read R value).
All the best.
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First generation Clio card (I own) has a built-in LCR meter and what's wrong with it is that it uses impedance magnitude and as such inserts into a formula for inductive reactance without any concern to phase angle, hence it makes larger error the greater the dcr of the coil.
Remedy: measure impedance of an inductor as if it were a drive unit. Then at some frequency of interest, find the inductive reactance which will give the correct value of L of the troublesome part.
Remedy: measure impedance of an inductor as if it were a drive unit. Then at some frequency of interest, find the inductive reactance which will give the correct value of L of the troublesome part.
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Need an LCR bridge to measure inductance itself, or else an AC source and a series impedance. You measure amplitude & angle at the divider point and then calculate the inductance based on the magnitude & angle of the divider voltage.
Do you have measurement gear to record impedance? You know, like Clio bundle, or REW, or ARTA or any other set?
If given a choice I'd rather choose to have all procedures and components put into place properly, than to have more than basic precision.
Similar method to REW, but a bit simpler in practice would be Woofer Tester 3 Dayton Audio WT3 Woofer Tester
Lojzek, I think diypass is also wanting to know how important all of this is.
BTW did you get the impression that the inductance meter reading might not necessarily be the less accurate, I notice that the testing procedure doesn't even use standing current...
BTW did you get the impression that the inductance meter reading might not necessarily be the less accurate, I notice that the testing procedure doesn't even use standing current...