John,
A resistor no matter how beefy it is consumes power. Larger watt units simply are made to dissipate the heat.
A choke where frequency is present may lower current without to much loss but they don't work without frequency.
Kevin Pemberton
On 03/15/2011 05:44 AM, John Green wrote:
Re: wire size
A quick question re wire size, and heating under load that was mentioned
in the current 'wire size' discussion.
If I added a wire wound heavy duty resistor in series with a dc motor to
slow the speed, and made sure it was beefy enough not to heat up, would
it consume any power?
I am thinking of a simple circuit with just the motor, battery, heavy
duty on/off switch, and wire to connect them.
I am thinking that it might, as it will create magnetism.
Thanks,
John
-- Ubuntu10.04, Acer AspireOne, Virgin Mobile 3G Broadband2go. Doesn't get any better than this!
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