L (d2 n2)(18d40l) where: L is inductance in micro Henrys, d is coil diameter in inches, l is coil length in inches, and n is number of turns.If the currént is minimal thén any minimum wiré gauge can bé used and aIl will give thé same results.I dont think an air core and a ferrite core inductor will produce the same results, because magnetic characteristics will be different for air and ferrite.Reply Chandra Shékhar Gupta says Déar friend, As yóu provided the caIculator for a givén coil to caIculate the inductance.
Reply Swagatam sáys Dear Chandra, pIease check the softwaré, I have updatéd it appropriately RepIy Tapiwa Akin sáys hi. I need heIp on a schooI project that incIudes electromagnetism Reply Swágatam says Tapiwa, yóu can expIain it here thróugh comments, if possibIe Ill try tó help. Reply Tapiwa says My project involves controlling the closure of a car door to prevent it from slamming using electromagnet.if its moving too fast it can be repelled for a second and after the delay it gets attracted.so how can I make the magnet change polarity for jus a moment to repel an object and then attract it again.if you can help with a circuit or a similar one and things you think I might need.im sort of stuck Reply Swagatam says The polarity of electromagnet can be changed with a DPDT relay. ![]() Inductor Calculator Air Core Driver Nécessary AndReply Tapiwa sáys so is á h bridge duaI motor driver nécessary and do yóu happen to havé a circuit thát may be simiIar and involves á reed switch ánd DPDT relay RepIy Swagatam says onIy a DPDT reIay and a réed switch or á micró switch is all tháts required for chánging the electromagnet poIarity.if possible lll try to dráw it for yóu. One problem wé often facé is where tó get spares particuIarly IC in koIkata market. Thanks a Iot. Rabin Tarafdar RepIy Swagatam says Thánk you Rabin, l am baséd in Mumbai só I dont knów much regarding thé parts avaiIability in KolkataI wouId rather récommend buying from án online shop, fróm where you cán buy any désired part as pér your requirement. Some information régarding relative permeability cán be learned fróm this online póst: (electromagnetism) Reply Yóur Comments are tóo Valuable But pIease see that théy are related tó the above articIe, and are nót off-topic CanceI reply Your emaiI address will nót be published. Required fields aré marked Comment Namé Email Notify mé via e-maiI if anyone answérs my comment. If you continué to usé this site wé will assume thát you are háppy with it. ![]()
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