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Forum topic by ChrisCrafts posted 02-26-2012 11:54 PM 2187 views 0 times favorited 6 replies Add to Favorites Watch
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107 posts in 2549 days

02-26-2012 11:54 PM

I am hoping to find some help from someone who has expert knowledge about running a 3 phase motor via single phase power and a VFD.

I purchased an old Delta Bandsaw with a Baldor 3 Phase motor on it.

I also picked up this VFD is supposed to work with it. But for the life of me I am unable to get the dang thing working, I have followed the directions exactly but still no go.

Any tips on what I should do????



-- Chris, Washington The State!

6 replies so far

View barecycles's profile


257 posts in 2292 days

#1 posted 02-27-2012 12:04 AM

Chris, pass along the VFD specs and tell us exactly how you wired things up.

-- Sweeping up sawdust in Texas

View lew's profile


12017 posts in 3719 days

#2 posted 02-27-2012 12:33 AM

You might send a request to LJ

-- Lew- Time traveler. Purveyor of the Universe's finest custom rolling pins.

View patron's profile


13600 posts in 3305 days

#3 posted 02-27-2012 01:21 AM

or to bob

he helped me with my vacuum switch
just through PM’s

you can always send the bandsaw and converter here

i’ll get it to you when it is working right someday

-- david - only thru kindness can this world be whole . If we don't succeed we run the risk of failure. Dan Quayle

View thiswoodshop's profile


141 posts in 2520 days

#4 posted 02-27-2012 01:29 AM

Do you want to run this as a 3 phase or will 2 be enough?.

-- Mo... For safety is not a gadget but a state of mind. ~ "Eleanor Everet" -

View EEngineer's profile


1101 posts in 3577 days

#5 posted 02-27-2012 11:41 AM

Posting this here too in case it might help someone else…

The link you provided to Ebay shows the VFD, correct? The wiring looks fairly simple. Let’s verify the basics:
1. 2-phase input: You should have 3 wires for 220VAC from a standard home connection: black should go to any one of R,S,T on the VFD; white should go to any other one of R,S,T on the VFD (obviously NOT the same one you connected black to!); green should go to E on the VFD. If you have different colors on the 220VAC connections (commonly Red, white , black OR red, white, black, green OR Black, Black, white, green), then the white is neutral and should be connected to E with green, the other two should be connected to ant two of R,S,T.
2. Motor connection: you should only have 3 wires to the motor. Color coding varies motor to motor. These should connect to U,V,W on the VFD.
3. Verify your motor wiring. The picture of your motor shows the correct wiring for LOW VOLTAGE (208-230VAC) and HIGH VOLTAGE (480 VAC). You must be running LOW VOLTAGE. You will have to remove the plate at the end of the motor and verify that the terminals are wired as shown for LOW VOLTAGE.

I suspect that your first problem is the motor wiring. Since the VFD seems to be ramping up the frequency (that display count you see going from 20 to 59.XX is the frequency it is feeding to the motor for a slow start), it looks like the VFD is operating correctly. The fact that the motor doesn’t turn at all may indicate that the motor is wired for 480 and you aren’t providing enough voltage to get it turning. The VFD is probably faulting on overcurrent.

Check the VFD and motor wiring and let me know. We’ll go from there…

-- "Find out what you cannot do and then go do it!"

View SASmith               's profile


1850 posts in 2951 days

#6 posted 02-27-2012 05:31 PM

I have the same vfd. Do you have a manual in english? The manual I received with mine was in chinese. I was able to find a translation of it online. If you need a copy I will try to find you one, just send me a pm.

-- Scott Smith, Southern Illinois

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