Rebuild quincy 325 air compressor

[Karl_T]

I stole a quincy 325 air compressor at auction a while back.

I has a 5 Hp 3 phase motor and I want to hook it to a 1 phase 220 plugin. So, I have been shopping VFDs. This one has my interest:

https://www.automationdirect.com/adc/shopping/catalog/drives_-a-_soft_starters/ac_variable_frequency_drives_(vfd)/general_purpose_vfds/gs23-2010?_gl=1*1sf9j9h*_up*MQ..&gclid=Cj0KCQjwyL24BhCtARIsALo0fSDGJQCNJXdtJSScITebpDCDCl0ZZsPhQ1IZoG_HPmB-mUpAhO7zPbMaAjNuEALw_wcB

Good Choice?? One question, I need an output to run a 24 volt air solenoid. This out needs to fire from startup until the compressor is up to full speed. Does this VFD have his ability? I was just going to get a Hitachi because I know it has what I need. This one is quite a bit cheaper.

FYI, this runs the unloader. This is the second time rebuilding an air compressor to run a 3 phase motor on a VFD. I learned the hard way about needing to keep the VFD unloaded till full speed. Previous thread:

Understand unloader valves

I bought a nice ten horse quincy air compressor at auction. Worked there, not when I got home :( First was electrical. installed new contactor and relaced burnt up wiring. Still no joy. Went completely through head. Removed ten pounds of burnt carbon several reed valves and springs. Man was...

www.hobby-machinist.com

PS, this is a winter project. I am asking early because this VFD is on back order.

 

[mksj]

Hi Karl,

VFD linked to should be fine, but I would recommend using it with a DC choke. Compressors still can be a difficult VFD load even with an unloader. The DC choke will decrease the THD/breaker size needed. Use a separate small universal power supply for 24VDC, not a good ideal to use the internal VFD power supply for things like relays, even with a reverse spike diode. Most switching power supplies can work off a range of input voltages like 90-260 VAC.
Mark