Motor/VFD Help

Bühlmann

Bühlmann

North Lake Forge
Joined
Jan 6, 2022
Messages
475
I'd post this in my grinder WIP in "Hammer & Tongs", but I think this forum gets more traffic.

I have an IronHorse 3-phase 2hp 3600rpm motor and a Chinese VFD. I've wired the motor according to the name plate diagram for "low voltage", and the VFD according to instructions. I'm confident that it is wired correctly. When I turn it on, it goes like this:

https://imgur.com/oMK4Eet

ETA: not sure why Imgur isn't allowing sound, but it sounds like skips/knock/ jolts as I slowly up the potentiometer, until it kicks off into error.

To me, sounds/feels like it's out of synch/phase. If I actuate the potentiometer too quickly it simply errors out Er.04 IPM alarm (short circuit): I don't know what most of that stuff means, but all of the settings are factory defaults, with the exception of the frequency which I changed to 60hz thinking that was the issue. I also changed some of the other settings mentioned to zero value, tested, same result, so I put them back to default values. I'm also getting 120V on each leg from house power, and up to 160V on each leg of 3-phase from VFD to motor. Any help is greatly appreciated!

IMG_0382.jpg
 
Can you post a picture of your wiring, or how you have the legs wired together?

Should be, 4,5,6 together, 1 to 7, 2 to 8, 3 to 9, correct?

Do you have a multimeter? If so, check resistance of 1-7 to 2-8 then 1-7 to 3-9 and 2-8 to 3-9. They should be balanced. Also check each one to the motor frame, it should read OL, open. This should be done disconnected from the VFD.
 
DaKruiser said:
Can you post a picture of your wiring, or how you have the legs wired together?

Should be, 4,5,6 together, 1 to 7, 2 to 8, 3 to 9, correct?

Do you have a multimeter? If so, check resistance of 1-7 to 2-8 then 1-7 to 3-9 and 2-8 to 3-9. They should be balanced. Also check each one to the motor frame, it should read OL, open. This should be done disconnected from the VFD.
Click to expand...

IMG_0381.jpg

I have it wired exactly as the "Low Voltage" diagram shows. 1-7, 2-8, 3-9, and then 4,5,6 tied together. Should 4,5,6 not be in contact with each other? I have them wire-nutted together. I don't know if this pic will help:

IMG_0380.jpg


I'll check ohms....
 
That’s correct, and 4-5-6 should be connected, that’s correct.

Check impedance, and post your findings for me, please.
 
Sounds like you have some parameters in the VFD that need setting. Unless the vendor has set those for USA and your motor there are several that need changing. What brand/model of VFD do you have? There are several Chinese VFDs around and not all have the same settings.
 
Ken H> said:
Sounds like you have some parameters in the VFD that need setting. Unless the vendor has set those for USA and your motor there are several that need changing. What brand/model of VFD do you have? There are several Chinese VFDs around and not all have the same settings.
Click to expand...
F3C5EF1D-AE55-4C9E-8489-8008EAEEDE90.jpeg
 
I have like 180V on each leg out of the VFD. That would overcurrent for sure, right?
 
That motor can pull just over 6 amps when wired for low voltage like you have. What is the max current rating on the VFD?
 
See if setting it at 6 amps helps.

Your motor current is a little higher at start up, you take your 5.22 and multiply it by the service factor, 1.15. That would give you 6.003 amps.
 
Try putting on your drive wheel during testing = give it some load and flywheel.

Sound would add context.

I'd give you acceleration and deceleration settings a longer time to start with.
 
Do you have a link to your manual to download? That would help us look at the parameters required. Is the motor mounted to the grinder so you can put a belt on the wheels? This will provide a tad of a load to help the motor level out if needed.

Perhaps increase the acceleration time to at least 3 to 5 seconds.
 
I'm not able to locate a link to the manual. Model is the YL600. That's all the CCP is revealing.

So I have it running, but it acts like it's cogging as the potentiometer is cycled through 0-60hz. It will error out (overcurrent) unless I go ridiculously slow, like unpractically slow. However, if I set the potentiometer at like 50-60hz and just simply turn it on with the "run" switch it winds up just fine. I don't know what parameters to adjust, and I don't like changing things I don't understand. Maybe it just is what it is, but I'm not happy with it if it is, as the ability to easily adjust rpms is compromised. I'm waiting on a new drive wheel, so maybe a bit of load will affect how it performs.
 
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Does that beast have braking built into it, Eric? Mis-set, that can cause cogging issues, too.
 
What if the pot is set at 50%, then turn the RUN switch on? Does it work then? Do you have a link to where you purchased the VFD? If it was Automation Direct where you got the motor they have a good tech depart who will help. It really sounds like some parameters aren't set properly. Good luck
 
fitzo said:
Does that beast have braking built into it, Eric? Mis-set, that can cause cogging issues, too.
Click to expand...
It does, Mike. I have the P00.03 setting set to "0" and what I think are the default braking settings set to:

IMG_0393[2998].jpg
 
Ken H> said:
What if the pot is set at 50%, then turn the RUN switch on? Does it work then? Do you have a link to where you purchased the VFD? If it was Automation Direct where you got the motor they have a good tech depart who will help. It really sounds like some parameters aren't set properly. Good luck
Click to expand...
Good question, and an interesting result. At around 40, 50, & 60% pot positions it errors out (Er.04), below & above that it fires right up.

I purchased it off of Amazon. Hopefully this link is acceptable given the intent & circumstances:


I did get the motor from Automation Direct. I was going to get one of their DuraPulse GS20 series VFDs, but they were backordered. I'm kinda wishing I had just waited now, but I think this is probably some setting and will be a successful learning experience for me about this stuff. I'm not very electrically/electronically savvy, but I'm trying! I appreciate the responses very much.
 
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Eric, have you tried P00.03 set as "1 Coasting Stop"? This removes any motor slowing out of the picture and allows it to coast freely.
 
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