i notice that all the inductors that have labels on them listing the uH or mH is just a single value....but doesn't inductance properties change with frequency? so is there a standard frequency that all inductors are tested at to give the value they have labeled when you buy them from retailers? or maybe, depending on the engineer's design for the inductor, they only test the frequencies that the inductor would be used throughout and then average the inductance???
reason why i am asking is because of a project i have, and when i worked out the math for the inductor value (786 uH) it hit me that i had no idea the "proper" way of measuring the inductor....i have the way to measure inductance roughly by knowing the frequency and measuring the current and voltage, but as far as i understand it, inductance changes with frequency so i didn't really know what frequency to measure it by :/
unless i'm missing something really huge here i don't really know which frequency i should measure these inductors at.
EDIT:
oh and these are homemade inductors btw, so its not like i'm buying them from a supplier
reason why i am asking is because of a project i have, and when i worked out the math for the inductor value (786 uH) it hit me that i had no idea the "proper" way of measuring the inductor....i have the way to measure inductance roughly by knowing the frequency and measuring the current and voltage, but as far as i understand it, inductance changes with frequency so i didn't really know what frequency to measure it by :/
unless i'm missing something really huge here i don't really know which frequency i should measure these inductors at.
EDIT:
oh and these are homemade inductors btw, so its not like i'm buying them from a supplier
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