Aaron Venable
Plastic
- Joined
- Jan 31, 2012
- Location
- Texas
To not completely hijack the other recent compressor thread, I've started this one.
I have an IR T30 2545E10V with a Baldor 215T frame 10 HP motor 200/3/60 33A.
I've moved it from work and now need to power it with 1 PH service from my home shop.
from similar thread...
I really like this idea for a dedicated setup, but I've got a few uncertainties about making it work for this compressor:
>For the drive, I've calculated a current ratio of 1.64:1. So at 1725rpm my compressor should be around 1054rpm. I've found a 5hp Baldor 184T 1725rpm motor locally that I'm interested in using. Assuming @ 90Hz this motor will produce roughly 2600rpm, and if I reduce the pulley size by a little over 30% I could maintain my 1000rpm at the compressor. During ramp up @30Hz the compressor would only produce 350rpm, and @60Hz 700rpm, etc.
Would this be a sufficient underdrive for the motor's hp?
> In the scenario above, I would need a 7.5" pulley for the 184T motor. Any thoughts or links on sourcing a pulley?
>I know there are many different technologies in VFD's now, and I'm not certain what would be adequate for this application. The ones I've found in this hp range are almost as much as a RPC, maybe I'm not looking in the right place?
I would like to use this setup so I could keep the 10hp motor to build a RPC at a later date, for multiple, light load motors.
Alternatively, I would keep the current motor and build a 20 hp RPC to run it from. Ugh...
Any help will be appreciated. Thanks
edit: I just ran across Maska's website for the "sheave" that I need, but if anyone knows an alternate source.....
I have an IR T30 2545E10V with a Baldor 215T frame 10 HP motor 200/3/60 33A.
I've moved it from work and now need to power it with 1 PH service from my home shop.
from similar thread...
I put a 4hp three-phase motor and a VFD on it... and reduced the drive ratio so that the motor would run the compressor slower at standard motor speed, then I increased the VFD's max frequency to about 100hz, and set the start ramp to bring it up to speed at a rate which doesn't put an incredible spike on the load.
By belting down a smaller motor, it took less motor torque to bring it up, and came up faster, with lower starting current. The pump runs at it's normal speed, just the motor's spinning faster... unloader works fine, and the lights don't dim when it ramps up... and it's QUIET.
I really like this idea for a dedicated setup, but I've got a few uncertainties about making it work for this compressor:
>For the drive, I've calculated a current ratio of 1.64:1. So at 1725rpm my compressor should be around 1054rpm. I've found a 5hp Baldor 184T 1725rpm motor locally that I'm interested in using. Assuming @ 90Hz this motor will produce roughly 2600rpm, and if I reduce the pulley size by a little over 30% I could maintain my 1000rpm at the compressor. During ramp up @30Hz the compressor would only produce 350rpm, and @60Hz 700rpm, etc.
Would this be a sufficient underdrive for the motor's hp?
> In the scenario above, I would need a 7.5" pulley for the 184T motor. Any thoughts or links on sourcing a pulley?
>I know there are many different technologies in VFD's now, and I'm not certain what would be adequate for this application. The ones I've found in this hp range are almost as much as a RPC, maybe I'm not looking in the right place?
I would like to use this setup so I could keep the 10hp motor to build a RPC at a later date, for multiple, light load motors.
Alternatively, I would keep the current motor and build a 20 hp RPC to run it from. Ugh...
Any help will be appreciated. Thanks
edit: I just ran across Maska's website for the "sheave" that I need, but if anyone knows an alternate source.....