From: James Meyer
Subject: Re: Ignition Coil High Voltage Power Supply
X-Newsreader: Forte Agent 1.92/32.572
Date: Sun, 12 Jan 2003 23:43:12 GMT
NNTP-Posting-Date: Sun, 12 Jan 2003 18:43:12 EST
On 11 Jan 2003 23:08:49 -0800, Thoremail@example.com (P!erCer) wroth:
>John Larkin wrote in message news:...
>> >> A) Is the output of my coil AC or DC? How do I check? I want pure or
>> >> pulsed DC.
>> >If You use an automotive ignition-coild and pulse the current on the
>> >primary, I'd say is is DC. you shut off the current, and the coild makes a
>> >flyback-voltage, which is in one direction only. For it to be AC would
>> >require some kind of capacitor it could swing/oscillate with (sp?)
>> A regular points-and-coil ignition system (or even a fancy CD type)
>> produces a damped sinusoid every shot. The DC component is nil. The
>> output of any transformer averages 0 volts, ie, has no DC component.
>Hmm...I don't really see why.
>The transformer is driven by current oscillating from 0 to 12 volts.
>From what I understand, the transformer's function is to amplify this
>voltage by a certain number. No matter what the voltage is, I will
>never get below 0. The output may indeed be sinusoidal, but the
>offset will place the "average" point into a strong DC range.
Please take the word of someone who knows much more about electronics
than you do. If John Larkin tells you something about current and voltage, it
is the truth even if you don't see why.