I have seven variable frequency drives in my shop converting 220 volt single phase power into three phase for my mill and other tools. I used to spend an hour or more getting each one working properly, but recently started using AI to generate the full parameter setup. It will output every setting, including display correction so the readout shows actual surface speed or RPM after a gearbox. It also sets the correct high and low limits for the speed knob on the VFD. In some cases it will also configure switched inputs so a button can turn the drive on and off and jump to preset RPM targets.
I had it generate the attached reference document that explains the parameters on most of the common Chinese VFDs you can get on eBay or Amazon.
You will need to oversize the VFD to at least 1.5 times the motor rating or you will have nuisance faults. Double check the input and output voltage ratings before ordering.
If you have a more complex setup you can feed the parameter sheets into AI and ask it to tune them for your exact hardware. It will usually give you everything needed to get running quickly.
Yup, programming a VFD is a time consuming and sometimes frustrating exercise. Some of the name brand VFD’s (I have several Hitachi) have a “self learning” mode and send signals to the motor to read and generate initial parameters that will at least start and stop the motor. Many of the other parameters then need individual programing (ramp up/down, etc). My shop is almost all 3 phase with equipment bought from High School shop public auctions, and the like. Some schools are finally rebuilding their shops and shop classes are back to available, but here in Spokane, it is with new school buildings being built typically, and incorporating shop rooms again. On the 3 phase machines, I usually paid more for shipping from Seattle area schools than for the machines themselves. Either way, lots of 3 phase was made available, and easiest to run and fine tune with VFD’s. Thanks for the AI advise. I need to try that out next time I need to program a VFD.
