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Re: Re: Re: Re: Re: Re: Re: LAST RESORT ON 6V TO 12V!
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Posted by Bob on October 03, 2001 at 17:34:19 from (216.182.21.138):
In Reply to: Re: Re: Re: Re: Re: Re: LAST RESORT ON 6V TO 12V! posted by Andy Martin on October 02, 2001 at 20:49:23:
My knowledge is mainly with A.C. Systems and I try very hard not to hook them up to a voltage other than what they are rated for. So hear is my train of thought, right or wrong. A motor is rated at a certain hp at the nameplate voltage. I'm not trying to say a 1 horse will become a 2 at double the voltage but it will increase. I once plugged my drop light into an outlet that had been incorrectly connected to the high leg of a 120/240 volt 3 phase delta system. The 100 watt bulb did not burn long, but boy was it bright when it was. A ac motor speed is controled by the number of poles and frequency of the incomming power. The few dc drives that I have worked on have been controlled by the amount of voltage flowing in the circuit. So what I believe is that even at no load a motor will draw a certain amount of amps, since the voltage drop across the windings of the motor is greater, than in my head a greater amount of amps will be drawn as well. So to me it's like running a water pump with to big a motor, a 10 hp will work but a 5 would be more efficient and the 10 will draw more. Sorry if this is wrong but in my head it explains why my cub starter spins faster and get hotter when it stalls cutting to high of grass. Thanks, Bob
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