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Reply-To: "bruce varley"
From: "bruce varley"
Subject: Re: HELP WITH INDUCTION SETUP
Date: Fri, 15 Nov 2002 18:42:04 +0800
X-Newsreader: Microsoft Outlook Express 5.00.2615.200
The behaviour of coupled coils depends critically on geometry and coupling
medium. At low frequencies, which is what you're dealing with here, the only
way to get tight coupling between the coils is by having a continuous
magnetic path - ie. some sort of magnetic core - and having the coils wound
tightly around that core, and in close procimity (usually on top of one
another). If the geometry is any looser than this, then effects such as
'leakage inductance' will have a big effect on what you see.
Hard to say much more without knowing the arrangement.
Gene De Guzman wrote in message
> Hi. I do not have any background in Physics or Electronics and I need
> help on induction.
> I bought an induction coil kit from sciencekit.com
> with a primary coil having thick coils of approx. 100 loops and a
> secondary coil with thinner coils of approx. 1000 loops. I have
> attached a 12-Volt DC Motocycle Battery (55 Amps) to the Primary Coil
> and so far I could induce a larger voltage in the secondary coil
> (using a voltmeter for measurement connected to the secondary coil) of
> approximately 60 volts and a lower ampere whenever I turn the switch
> My goal really is to reverse the connection by connecting the Battery
> into the secondary coil (thinner coils with more loops) and induce a
> lower DC voltage and a higher ampere into the Primary Coil (thicker
> with less loops) and this is not happening. What I get is a lower
> voltage (which is expected) but the ampere induced in the Primary is
> lower too instead of higher.... what am I doing wrong? ... need your
> expertise in the construction detail.
> My goal is to use a 12DCVolt/55Amp Battery and induce a
> for a VERY SHORT PERIOD OF TIME like a half second or millisecond over
> and over again.... I thought that this is as simple as having a Coil
> with 1000 loops and another with 100 loops to get a 10 to 1 ratio and
> thereby reducing the voltage by 10 times but increasing the Ampere by
> 10 times... I guess I am missing something. How come it works when I
> try to induce a higher voltage but when I reversed it to induce a
> lower voltage with high ampere it does not work?
> Could anyone help in the setup? I would really appreciate any help.
> Thanks in advance.
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