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*To*: tesla-at-pupman-dot-com*Subject*: ballast formula*From*: "Tesla list" <tesla-at-pupman-dot-com>*Date*: Wed, 21 Feb 2001 16:48:15 -0700*Resent-Date*: Wed, 21 Feb 2001 17:12:18 -0700*Resent-From*: tesla-at-pupman-dot-com*Resent-Message-ID*: <-ZMvUD.A.fhE.YlFl6-at-poodle>*Resent-Sender*: tesla-request-at-pupman-dot-com

Original poster: "James T by way of Terry Fritz <twftesla-at-uswest-dot-net>" <jamest2000-at-att-dot-net> Hi All, I was wondering if anyone had some math that may help. I would like to use a transformer core for a ballast. Given the dimensions, magnetic properties, frequency, current ect. , is there a way to calculate turns = inductance? Lets assume an ungapped core, say an EI type. I have the formulas to calculate inductance = reactance. From that I can calculate current. How do you calculate inductance without trial and error? If you have the answer, please speak slowly, as my math skill are lacking. :-) James T

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