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Posted: 9/5/2005 6:41:35 PM EDT
[#1]
Pretty sure it has to be a 3 phase motor. I run a TECO VFD on my Bridgeport, matched setup from Dealers Electric Supply in NY (NJ now). They have great deals.
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Posted: 9/5/2005 6:49:54 PM EDT
[#2]
Get somebody to hold your beer and try it!
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Posted: 9/5/2005 6:51:48 PM EDT
[#3]
heheh..here, hold my beer!
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Posted: 9/5/2005 6:59:25 PM EDT
[#4]
If the drive is worth it's salt it will fault out when it senses that it is drawing more current on two legs due to the fact that one leg is open.
What kind of drive? Was it |
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Posted: 9/5/2005 7:01:27 PM EDT
[#5]
I'm not an electrician, but have connected some industrial single and three phase equipment.
FIRST check the data plate on the motor. It will spec voltage, amperage and freguency. Then check your source. I'm not familiar with a vfd. If it was commercial power I want to make sure that the voltage (in my area usually 208) matches and that there is sufficient current available. Make sure the frequency is supported by your vfd. IF THE SPECIFICATIONS are compatible, then connect the single phase motor accross two of the poles of the supply. YOU MIGHT CHOOSE TO USE A VOM TO CHECK THE VOLTAGE FIRST!. If you look at a three phase panel, you will see how a three phase 208vac breaker connects to all three input poles, a single phase 208 vac breaker connects to two input poles, and a 117vac breaker connects to only one pole (other connection to the neutral). Standard disclaimer goes here. Seriously, you are dealing with enough power to get hurt. Don't push your luck. Again, use the VOM to test with. Tcom |
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Posted: 9/5/2005 7:30:32 PM EDT
[#6]
I just bought ths stuff on ebay. I bought the outstanding Freq drive cheap on ebay with plans of getting a proper 3 phase motor for it....then a few days later the pump of my dreams came on ebay for an outstanding price. So I bought it even though the motor is a 1 phase. ( I think its one phase, I havent recieved it in the mail yet)
Now the VFD website says that it can output 1phase or 3phase, but the label plate on the VFD says "output 3 phase", so im getting confilicting info from the manufacturer ....it was my understanding that only 3 phase motors could be speed controlled with a VFD and not single phasers. Am I wrong? I may just hook all the shit up and plug'er in  [I have a Fluke...Ill use first. Im an electronics person by trade however I only work with low voltage DC. 3 phase motors n shit is new to me even though I was trained on it 10 years ago...guess, if you dont use it - you lose it] heres all the known specs for the models:  
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Posted: 9/5/2005 7:37:37 PM EDT
[#7]
Like was already said. If you hook your single phase motor up to that 3 phase VFD it should fault on a "single phasing" condition. You will only be drawing on 2 "legs" and the third will be zero, which would indicate to the VFD that you are "single phasing" which would ruin a 3 phase motor.
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Posted: 9/5/2005 7:40:42 PM EDT
[#8]
I think it may be programable by motor type. I'll have to check on it. If it doesnt work, I'll probably have to buy a 3 phase motor. |
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Posted: 9/5/2005 7:43:37 PM EDT
[#9]
Cool,
You must have bought that hydroponics setup off of the EE the other night.  Anyway, I have seen a ABB drive similar to what you have there, that drive would take single phase low voltage (208-220) and output 3 phase low voltage (220). I don't think it is gonna work with your single phase motor. However, That drive is nice enough that it ain't gonna smoke just from you trying to run the single phase motor with it. Worst case senario is it will fault out with a phase imbalance fault. best case it will work. |
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Posted: 9/5/2005 7:57:10 PM EDT
[#10]
Damn, you might go back in time if you do that. |
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Posted: 9/5/2005 7:59:13 PM EDT
[#11]
Just what exactly is all of this stuff?
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Posted: 9/5/2005 8:00:33 PM EDT
[#12]
its an AC pump and speed control |
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Posted: 9/5/2005 8:00:36 PM EDT
[#13]
Gas- is that a pic of the actual VFD? I ask because the front of the unit is marked for 1 HP, single phase operation yet the pic of the nomenclature clearly states the output at 3 phase. The specs you posted appear to be listing the model specs that can vary based on what model spec you order. If I had to guess the unit in the 1st picture is set to run a 200-240 v, single phase motor. That may be able to be changed in the programming as well. Call the maker and give them the PN and ask what you have.
Edited to add that yes, Single phase motors can be driven by a VFD. |
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Posted: 9/5/2005 8:04:04 PM EDT
[#14]
I don't see how it could possibly work. Single phase motors have start windings , capaciters, centrifical clutches, they are completely wrong for variable freq. drive.
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Posted: 9/5/2005 8:06:01 PM EDT
[#15]
WHOA!  excellent observation. I think its the actual pics of the unit...but it may not be. Im seriouly confused now. I guess I'll just have to wait till I get it in the mail to see, it should be sometime this week.Thanks for all the help folks, I'll have to post back here with my results. |
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Posted: 9/5/2005 8:09:09 PM EDT
[#16]
I wondering about that. But this whole thing got my going down the confusing direction when I read on the Danfoss VFD website that it may support both 1 and 3 phase output. I called the company to ask some questions but they are French Canadian's and didnt understand WTF I was talking about. LOL |
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Posted: 9/5/2005 8:13:05 PM EDT
[#17]
I just downloaded the manual for this drive. Looks like that unit was built in 2001. from my 5 min scan of the manual it will output three phase only. However, in the fault list I do not see phase loss or phase imbalance. I still don't think it will work.
They offer this drive in several different input and output configurations that is probably why they said it could do both. I believe ultimately you have to choose. I would swap motors that drive looks to be a decent unit. It has a built in PLC and counter if you interested in utilizing that type of thing. Not to be too nosey, but, Whatcha doin wit all dis? 
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Posted: 9/5/2005 8:18:04 PM EDT
[#18]
hey thanks! Im making a high speed gasoline extraction unit. Basically, I can go around to peoples cars at night and re-appropriate precious gasoline from their cars tank to mine. Make for plenty of fast free fuel.  J/K, Its actually a pump to transfer wine from barrels and tanks. 
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Posted: 9/5/2005 10:58:01 PM EDT
[#19]
Why do you need variable speed on a mere transfer pump, and what will you be using as the speed reference signal? What type of flowmeter will you be using?
A little better description of the intended appication would be helpful. P&ID if you have one.. |
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Posted: 9/5/2005 11:15:54 PM EDT
[#20]
Like KJ said, what are the details of your application. You can feed a VFD with 1 Ph power, but you need to have a 3Ph motor on the output. What are you trying to do? Application info is needed to help you out.
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