I'm trying to design these inductors for some speakers that are almost done, except for these 2 - 12 mH inductors.
I have some 12 AWG (2.05 mmin diameter) wire I want to use for these inductors, but I can't seem to find a suitable core. I'm not sure of the current going through them. I made an air core inductor that's 12 mH, but it weighs 8-10 lbs and has a somewhat large .6-.8 DCR. I was thinking of making them with some CRGO (silicon?- don't know what that means) steel laminations made into EI-cores, but they wound up being really expensive and difficult to make. I have just resently heard that some people use large ferrite or iron powder toroid cores for this application, but I'm not sure what kind or if this is the right core. I thought toroids were just doughnuts and then I went to www.dtmagnetics.com and they have "common mode toroids" and they seem to be rectangular, when looking at their dimensions and now I'm all confused about what the core I'm looking for looks like.
All this possibly senseless writing brings me to my question. Does any one know what kind of core I should use?
I have some 12 AWG (2.05 mmin diameter) wire I want to use for these inductors, but I can't seem to find a suitable core. I'm not sure of the current going through them. I made an air core inductor that's 12 mH, but it weighs 8-10 lbs and has a somewhat large .6-.8 DCR. I was thinking of making them with some CRGO (silicon?- don't know what that means) steel laminations made into EI-cores, but they wound up being really expensive and difficult to make. I have just resently heard that some people use large ferrite or iron powder toroid cores for this application, but I'm not sure what kind or if this is the right core. I thought toroids were just doughnuts and then I went to www.dtmagnetics.com and they have "common mode toroids" and they seem to be rectangular, when looking at their dimensions and now I'm all confused about what the core I'm looking for looks like.
All this possibly senseless writing brings me to my question. Does any one know what kind of core I should use?