Electric Motors

From Open Source Ecology
Jump to: navigation, search

Small DC Frame Sizes

  • $6 for 24V, 1000RPM - 15W - [1]

No Gearbox

  • 550, 775, 895 - etc frame sizes - [2]
  • Ex. 775 motor - 150W - [3]
  • Ex 895 motor - 360W - $17 - 12000 RPM - [4]. Good power but fast.
  • 150W for $12 - [5]

Geared

  • 14W - $6 - 1000 RPM - or slow, down to 22 kg-cm [6]. Cheap but too low power.

Using Existing Drills

  • Corded drills may be used as a power source.
  • Cheap option, for good torque - 600W. $30 off the shelf. [7]
  • $15 for 3/8" drill - 300W - [8]
  • Best option for powering a shredder- use common drills.

Treadmill Motor

  • The best option for the money, $50 for 3 hp. [9]

NEMA Motor Sizes

Basic

  • This page explores sourcing for various electric motors
  • Summary: 4 hp treadmill motors (high voltage DC) are the cheapest replicable source of motors per horsepower - at $20 per horsepower. Next is 5 hp compressor motors for $180, or $60/kW. Interesting, the surplus treadmill motors are a win. Since they are 130VDC, you could rectify regular wall power or use batteries

BLDC Hub Motors

220 AC

Best price per kW for motors - $70/kW

  • 5 hp compressor motor - $180 - $60/kW - [12]
  • 5 hp/ 3kW compressor - continuous duty - $215 - [13]

Weird

See Also