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*To*: tesla-at-pupman-dot-com*Subject*: Re: Rewrite of Mutual Inductance Laws for Tesla List*From*: "Tesla list" <tesla-at-pupman-dot-com>*Date*: Fri, 17 May 2002 15:21:03 -0600*Resent-Date*: Fri, 17 May 2002 15:21:45 -0600*Resent-From*: tesla-at-pupman-dot-com*Resent-Message-ID*: <zlJ9j.A.3kB.cRX58-at-poodle>*Resent-Sender*: tesla-request-at-pupman-dot-com

Original poster: "Paul Nicholson by way of Terry Fritz <twftesla-at-qwest-dot-net>" <paul-at-abelian.demon.co.uk> Harvey, > http://groups.yahoo-dot-com/group/teslafy/files/RI/Dsc00184.jpg > L1 =10.8 mh, C1 =14 uf > L2= 60 henry, C2= 1 nf > Input = 1.67 volts *.35 A = .58 VAR > Output=(4/3.16*1000)*.004A = 5.06 VAR Unfortunately, the jpg doesn't make clear the circuit arrangement, so we're not sure just where the V and I measurements were picked up. But it's clear you've got a pair of coupled LC's both resonant near your alternator frequency. I suspect that your input measurements are made between the alternator and L1C1, in which case if L1C1 is tuned to the alternator frequency these values will represent *real* power, not VAR. Whereas with the L2C2 measurements, the current can only be the reactive circulating current (since you've not mentioned a load), and therefore the 'output' reading is really the VAR of the stored energy in L2C2 resonator. On this basis, we can estimate the Q factor of your combined L1C1/L2C2 system. Your 5.06 VAR represents a stored energy of 1680uJ (since this energy circulates back and forth between L2 and C2 some 2 * pi * 480 times per second). If 0.58 Watts of real power are necessary to replenish the leakage from your store of 1680uJ, then the Q is given by Q = 2 * pi * frequency * stored energy / input power = 2 * 3.141 * 480 * 1680e-6/0.58 = 8.7 So I'm afraid I don't see anything in your post which indicates a problem with mutual inductance. At times like this you always have to ask yourself which is the most likely of two possibilities: Either you've misunderstood the operation of the circuit, or some very well tried and tested laws of physics are wrong. -- Paul Nicholson --

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