"Budget" Single Phase 5HP Compressor Motor ?

[plinker]

Here's a selection, all air compressor duty, check the specs for amp draw, ete.. as they have several options. Pretty good place to buy from IME.

https://www.surpluscenter.com/Electric-Motors/AC-Single-Phase-Motors/Air-Compressor-Motors/

 

[kythri]

I was in the same position a few years ago. I purchased a motor here and it's been great.
I have NO affiliation, just passing on info-- https://castair.net/major-components/motors/

Thanks, I'll check them out!

 

[kythri]

Here's a selection, all air compressor duty, check the specs for amp draw, ete.. as they have several options. Pretty good place to buy from IME.

https://www.surpluscenter.com/Electric-Motors/AC-Single-Phase-Motors/Air-Compressor-Motors/

Thank you!

 

[speed bump]

What does the nameplate on the motor say? Gonna need an RPM and frame size to find a motor.

 

[u3b3rg33k]

You can try Automation Direct, and put a variable frequency. Drive” vfd”on it. They also sell them on Amazon.

the "best" option from them is the durapulse GS23-2015, 15hp rating, 7-1/2hp with 1-phase input. should have plenty of torque to actually start up a SPL compressor motor. about $600.

Why a VFD over a native motor?

Seems to be adding more complication than I need.

you get soft start, the ability to run slower RPMs (for noise), no motor rated contactor necessary, etc. it's probably a wash on price, motor + starter or single phase input VFD. depending on the design of the compressor, you may need an unloader for a VFD driven setup to get moving. you can cheat SOMETIMES with a DOL motor, and you won't care unless you look at the inrush. or your neighbors complain about the lights dimming.

VFD's are cheaper than a new motor, and 3 phase motors are inherently "better" than single phase motors for a variety of reasons.

I checked my go-to, also $600 and up, depending on if you want the IP66 conduit ready version or not.

 

[jar944]

the "best" option from them is the durapulse GS23-2015, 15hp rating, 7-1/2hp with 1-phase input. should have plenty of torque to actually start up a SPL compressor motor. about $600.


you get soft start, the ability to run slower RPMs (for noise), no motor rated contactor necessary, etc. it's probably a wash on price, motor + starter or single phase input VFD. depending on the design of the compressor, you may need an unloader for a VFD driven setup to get moving. you can cheat SOMETIMES with a DOL motor, and you won't care unless you look at the inrush. or your neighbors complain about the lights dimming.


I checked my go-to, also $600 and up, depending on if you want the IP66 conduit ready version or not.

$284 12FLA, up to 18fla @ 10% duty cycle.

VFD, 3hp, 12A, 230VAC, Single Phase Input, Compact

VFD, 3hp, 12A, 230VAC, Single Phase Input, Compact Micro Drive, Easy To Use, Optional NEMA 1 Kit: NEMA1-C2-301 and Optional DIN Rail Mounting Adapter: RMA-C1-3.7 Available to Order Separately

www.wolfautomation.com

 

[u3b3rg33k]

not bad. I was looking at a true 5HP VFD. compressor starts need all the help they can get. the 15hp unit I mentioned should be able to provide near grid-level starting ability having the output stage being 3x the motor size. rated output is 49A 3ø [24.5A 1ø]. DOL single phase motors often pull 5x nameplate.