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Tool Talk Discussion Forum

Re: Motors and Sparkle question revisited

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Ken Macfarlane

10-09-2013 07:38:03

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Now how does that go Eli the iceman? Inductive loads voltage leads current capacitive loads current leads voltage? Off one power factors seems to confuse a lot of the home built infinite power machine folks. They rarely correct for it or want to hear about it.

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John T

10-09-2013 09:33:34

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 Re: Motors and Sparkle question revisited in reply to Ken Macfarlane, 10-09-2013 07:38:03  
Who is Eli???? Until he arrives here"s a brief discussion

This may help just a tiny bit, but AC circuits and reactance AND POWER FACTOR sure cant be explained in a paragraph. IE This will not help Billy Bob or Bubba one bit

At T = 0+ an Inductor is very high resistance like an initial open circuit as it opposes any sudden change in current.

At T = 0+ a Capacitor is like an initial short circuit cuz the electrons flow easily to accumulate a charge on the opposite plates and it opposes any sudden change in voltage. Once fully charged, to DC at least it acts like an open circuit but will pass AC with its reactance depending upon frequency, higher the frequency the less reactance.

In a pure resistive load no L no C the Power factor is unity 1, voltage is in phase with current. If either L or C are out of balance the current either leads or lags (l OR c). The power factor is the cosine of the angle between the voltage and current legs and the cosine of zero is one i.e. if both in phase the power factor is cosine of zero or one.

OKAY Im NOTTTTTTTTTTTT gonna take the time to argue or fight or try to explain this subject which can fill electrical engineering libraries and take a ton of time to study and comprehend so if yall are interested take a few courses and study up IT IS INTERESTING AND FASCINATING

That"s all I have to say about that lol

John T

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Ken Macfarlane

10-11-2013 06:41:36

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 Re: Motors and Sparkle question revisited in reply to John T, 10-09-2013 09:33:34  
Hi John eli the ice man was an old memorization mnemonic. E (voltage) before I (current) for L (inductive). I can't even remember why L is used for inductive load, isn't the units Henries for inductive loads? Oh well thats what electrical engineers are for!

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