Treadmill Motor Help Needed

randyjaco said:
Yeah! I got it running. It seems that there is some lag in the motor starting. Then it must have instantly jumped to its 5K rpm. I had not secured the motor well. It jumped off its mount and the fly wheel landed on the cord and in less than 5 seconds abraded its way through the 110 volt cord. No real damage was done and it is running fine now.
One final question: How does a 2.5 HP DC motor develop that much horsepower with a max input of 15 amps at 120 VAC?

Thank you very much for your help. Otherwise the whole thing would have ended up in the trash. Now I have to start building a belt grinder.

Randy
Click to expand...
For what it's worth - probably not much at this point, but anyhoo - the relationship between HP and amps and VAC backs up the claim, if only theoretically:
1 HP is equivalent to 745 watts, so 2.5 HP = 1863 watts.
Per Ohm's Law (Power = voltage times current) 1863 watts at 120 V draws 15.5 A.
(AC vs DC? no diff for this purpose).
This is a power input calculation - the actual HP output by the motor will be less and vary according to design, load, etc.
 
You must log in or register to reply here.
Back
Top