All your problems solved for a grinder motor

Wow, that does sound like a super crazy but cool compressor.

Tryp, that's the idea. Actually, I'd love to try building a shop with overhead line shafting off of a water wheel!
 
A 1.5HP 24VDC motor could run off solar power. However, at about 1.5KW under full draw and solar running around $2 per watt, that means you need $3000 in solar cells to run your $500 motor :eek:
 
The converter would draw more current than a plain 110VAC 1.5HP motor.
The transformer drops the 110VAC down to 24 volts AC. That causes some loss due to transformer efficiency, lets call it 95% efficient.
Then, the voltage going through the rectifier has a voltage drop because of the way the voltage wave is clipped by the diodes.
The output of a bridge rectifier is about 80% ,IIRC. Thus, running a 1.5HP - 24VDC@60 amps =1500Watt motor from a transformer and rectifier will require about 2000 watts or 110VAC@18 amps.
A regular 110VAC 1.5 HP motor would use 4 less amps.

For those who notice that the DC motor numbers used appears to be higher that the standard of 746 watts per HP...you are right. Most DC motors are HP rated at their developed HP, but the power is stated at max draw. Thus a 1.5HP motor is also called a 1500Watt motor...and those numbers don't jive until you factor in the efficiency, which is usually 75-90% for DC motors. Beware of anyone who claims their DC motors are 95-99% efficient.
 
This thread conjures up images in my head of the ole flat belt shops where they ran a dozen or so machines with the aid of an overhead transfer shaft, (there is a name for that particular shaft and I can't think of it at the moment) that had belts running to each and every different machine in the shop. Each machine was powered by the tightening of that individual machines belt! All those belts running and no guards or anything to keep you from getting into the belt. That is back when they went by ole school knowledge. YOU WON'T DO THAT BUT ONE TIME! :eek::D

I was actually in a ole saw mill one time that was powered by a water wheel and had two or three levels with different machines on each level. It had been restored mostly and it was the coolest thing I ever saw. They even cut and sold some lumber from it at the time. You couldn't be in there when it was running though because of liability issues!:grumpy:
 
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