RE: [DML] Re: Idle Speed Motor / Cooling

["Elvis Nocita" <elvisnocita@xxxxxx>]

What ?
I was as realistic as possible - I used the car's battery !!!!

12V not 12 amps !

amps is the current that will flow when a resistor is connected
between the two poles of a voltage source. 
Ohm's law: R = U / I -> I = U / R

U is fix (12.5V only battery and about 13.8V with engine running)
Resistor of the motor is also fix = 14 Ohm.

So the max current can be only 1A.

Sorry but this is basic knowledge that is described in any
basic electronics book on the first 2 or 3 pages.

Elvis

> 
> Try it (with out) a regulated power supply or 1 amp. Most people trying it
> use a battery with unlimited current. I have a 12 amp power supply
> regulated.
> John Hervey
> 
> 
> 
> -----Original Message-----
> From: dmcnews@xxxxxxxxxxxxxxx [mailto:dmcnews@xxxxxxxxxxxxxxx]On Behalf
> Of Elvis Nocita
> Sent: Wednesday, July 27, 2005 12:06 AM
> To: dmcnews@xxxxxxxxxxxxxxx
> Subject: AW: [DML] Re: Idle Speed Motor / Cooling
> 
> 
> 
> Well, mine survived 2 minutes of testing it continuously without any
> trouble. Yours don't ?
> 
> here the pictures:
> 
> first coil:
> http://img181.imageshack.us/img181/6575/cimg92547oh.jpg
> 
> second coil:
> http://img181.imageshack.us/img181/5259/cimg92568sr.jpg
> 
> close view:
> http://img181.imageshack.us/img181/2229/cimg92580in.jpg
> 
> 1A @ 12V = 12W -> not enough to burn the coils !
> At least not within a few seconds and under regular conditions.
> In my case the engine also was still hot from driving.
> 
> Resistance of the single coils is around 14 Ohm.
> 
> Elvis & 6548





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