Written Pole Motors

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kdubya

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A customer wishes to install a 3-phase 50 HP irrigation motor however, only single phase is available.
I've read of a "written pole motor" or, single phase motors that can substitute for 3 phase. I've seen a bit of information in previous threads but nothing lately.
Here is the link to the site:
http://www.precisepwr.com/single_phase_motors.asp?bhcp=1

Does anyone have any experience with this motor?

Also, I'll find out if the utility supplies single-phase 480

Thanks
 
100212-1315 EST

Interesting.

It is a trademarked name and probably patented design.

Initially before looking at the attachment I thought you were talking about some phase converter device.

Ideally you would want to buy the pump with this special single phase motor already installed.

You need to look at some real experimental data to see if this motor would do what you want.

If your pump load was almost always constant you might be able to make a purely passive phase converter work to drive the three phase motor.

.
 
I saw a demo & display of these at a farm show years ago. They had some case files of where they had put them in for irrigation on farms and golf courses. Neat stuff.
 
The specs say 85fla for 50hp at 460v. That's retty low, and there's nothing in NEC 430 to compare it to. 3ph is 65a.

It's also almost 4' long and 1900 pounds. That's a big puppy.
 
find out what it will take to get 3 phase,

phase conversion is common around here on irrigation equipment but on a motor that large is pretty expensive both up front as well as maintenance.

even if you can get open delta system from POCO it is better in the long run.

Also make sure POCO is willing to supply 50 hp on the single phase line or across the line starting of it.
 
Last edited:
LarryFine said:
The specs say 85fla for 50hp at 460v. That's retty low, and there's nothing in NEC 430 to compare it to. 3ph is 65a.

It's also almost 4' long and 1900 pounds. That's a big puppy.
Click to expand...

Anybody find it strange that the FLA on the 40 HP is 142amps while the 60 hp is only 103amps?
while the 30hp is 104 but the 50hp is 85?

Heres the whole list:
FLA:
30hp=104 amps
40hp=142 amps
50hp= 85 amps (50.746)/240=155.42 amps?
60hp=103 amps
75hp=129 amps
something doesnt sound right?

Wow I could use one of these to power a generator and have enough power left over for it to power it's self LOL
 
Last edited:
hurk27 said:
Anybody find it strange that the FLA on the 40 HP is 142amps while the 60 hp is only 103amps?
while the 30hp is 104 but the 50hp is 85?

Heres the whole list:
FLA:
30hp=104 amps
40hp=142 amps
50hp= 85 amps
60hp=103 amps
75hp=129 amps
something doesnt sound right?
Click to expand...
They are different voltages.
 
hurk27 said:
Anybody find it strange that the FLA on the 40 HP is 142amps while the 60 hp is only 103amps?
while the 30hp is 104 but the 50hp is 85?

Heres the whole list:
FLA:
30hp=104 amps
40hp=142 amps
50hp= 85 amps (50.746)/240=155.42 amps?
60hp=103 amps
75hp=129 amps
something doesnt sound right?

Wow I could use one of these to power a generator and have enough power left over for it to power it's self LOL
Click to expand...
30hp=104 amps, 230 volts
40hp=142 amps, 240 volts
50hp= 85 amps, 460 volts
60hp=103 amps, 460 volts
75hp=129 amps, 460 volts
 
hurk27 said:
Just when I thought I could go into business selling perpetual motion generators darn:mad:

I need to go back to Evlyn Woodhead's and take a refresher course:roll:
Click to expand...
No posting penalties accessed between midnight and 5 AM. We are liable to say anything. :grin:
 
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