86turbodsl
Cast Iron
- Joined
- Aug 12, 2004
- Location
- MI, USA
Can anyone critique this? -
Is there any reason i can't do this.
10HP air compressor.
Rated 500rpm to 800rpm. Pump is rated for 10HP and 15HP use.
Use a 480V VFD, supplied by a 240 to 480V step up transformer.
Use a say 7.5HP TEFC interter motor (surplus)
Setup the drive sheaves so the motor runs like 40Hz @ 500 rpm.
Variable speed up to pump maximum of 800rpm. I know torque falls off
on a normal motor when overdriven but since we'd be supplying the motor with 480V when it's wired for 230V, would that not allow the voltage to continue to increase past 60hz, allowing the motor to double it's hp and get away with a commesurate smaller drive AND motor?
Is there any reason i can't do this.
10HP air compressor.
Rated 500rpm to 800rpm. Pump is rated for 10HP and 15HP use.
Use a 480V VFD, supplied by a 240 to 480V step up transformer.
Use a say 7.5HP TEFC interter motor (surplus)
Setup the drive sheaves so the motor runs like 40Hz @ 500 rpm.
Variable speed up to pump maximum of 800rpm. I know torque falls off
on a normal motor when overdriven but since we'd be supplying the motor with 480V when it's wired for 230V, would that not allow the voltage to continue to increase past 60hz, allowing the motor to double it's hp and get away with a commesurate smaller drive AND motor?