I live in Canada, markham, ontario. Is there any factory that builds industrial inductors of that many henries? I've been googling but have had no luck. Please refrain from asking why i want it. I just do.I'd appreciate the help. Thanks.
This is another silly question without knowing basic concept of basic parts. 1H inductor coil has size about 3' x 3' x 3' in iron core cost over $1000. Now you imagine how big would be a 1,000,000H coil and how much it could cost to make one.
Actually, you have to tell at least some of what you want to do - voltages and rates of change are important - are you talking AC power or DC? smooth flowing or attempted abrupt changes. Giant sparks or electronic guns. In fact, the designation of most products (inductors) in microHenries, down to nanoHenries, should give you a clue that is stated here electronics-tutorials.ws/indu that the Henry is a very large derived unit from meters, etc. and a million Henry unit is going to have to be custom built of water cooled pipe and supplied with lots and lots of amps .
You can't buy an inductor with a value of 1 million henries. It would be huge and extremely heavy.
I think you are correct that henies add when inductors are connected in series so 100,000 ten henry inductors connected in series makes a million henries. There will be an amp specification and active cooling may be necessary even for one amp. Excessive current saturates the core reducing the inductance. If you tell us your application , possibly we can be more helpful. With very fine wire, I think, much smaller than a cubic meter per henry is possible. Neil
The link below gives an idea of just how large this might be, and I took this a bit further using rough approximations. Using a toroidal core with radius 100cm, and 6000 turns of about 1mm wire, with a core radius of 15cm and a core material permeability of 2000 (some sort of steel), gives about 1000H. A core like this is not available. Without a steel core the wire goes up dramatically. The wire could carry up to an amp or more, but something like 20mA would saturate this already huge core (2m diameter) at an arbitrary 1 Tesla. It needs to have a proportionally larger core cross section for larger currents, or reduce the number of turns and so inductance reduced by the square of the turns. The length of wire is like 5.6km, and the resistance about 130 ohms. With 1000 of these in series, it needs 1300V DC just to get 10mA flowing because of the resistance. This would store only about 50 joules, so is not a very useful inductor. A lot more could be achieved with less inductance and a higher current. When disconnected its biggest feature would be displayed. An impossibly high voltage would appear, that would likely destroy any attempt at insulation. This is born out by the definition of a henry. With a rate of change of current of one ampere per second the resulting electromotive force is one volt. If we applied the 1300V to the series combination, it would take about a minute for the current to get to almost the expected 10mA. This tells us that it is not meaningful for an AC situation. At 50Hz the reactance is 314 megohms so it would take about 3MV (megavolt) RMS to get that 10mA RMS.
