[TheForge] that tired old phase converter question again

Wed Jun 26 00:35:01 2002

Exactly. The idler motor goes in parallel with your load motor (with 
appropriate switching). You have a very simple means to put together a 
rotary converter (or two). Just adding an idler should improve your 
chain fall quite a bit (but check it...). Adding capacitors (rule of 
thumb given in article previously mentioned) will improve things even 
more. Not so much a matter of efficiency as balancing the current in the 
motor windings. You basically want to add capacitors until the voltages 
from each side of the single phase to the third leg are about 10% higher 
than the single phase itself. This gets you pretty close to balanced 
under load.

It is looking like our move will be next summer. I'll keep you (and 
others) posted.

Steve

Ralph Sproul wrote:
>         Steve, So your saying you just put this idler motor between the
> static unit and the load you are trying to supply??   Just curious as I have
> two of those static units and don't really hvae a need for them.   Wondering
> if this would improve the efficiency of them as I used a static on a chain
> falls once, and it would heat the motor to the point I stopped using it for
> fear of destroying a nice electric chain falls.
>         Nice to meet you in Wisconsin, let me know when your heading east
> some time, or if you move.
> 
> Ralph Sproul - Bear Hill Blacksmith
> Webster, NH
> 
> 
> 
> ----- Original Message -----
> From: "Steve Smith" <[email protected]>
> To: <[email protected]>
> Sent: Monday, June 24, 2002 10:17 PM
> Subject: Re: [TheForge] that tired old phase converter question again
> 
> 
> 
>>If you want a rotary converter but don't want to build it, all you need
>>to do is get a static phase converter and use it to start an idler
>>motor. Now you have a rotary converter.
>>
>>Steve Smith
>>
>>Mark A. Pesetsky wrote:
>>
>>>I did a search to see how much a purchased phase converter would be
>>
> because
> 
>>>I
>>>may need one in the near future as well.  I found that they are
>>
> expensive
> 
>>>but
>>>I also found a company that builds a panel that you hook up to your own
>>>idler
>>>motor.  The $325 for the panel sized for a 10hp motor might not be that
>>>much
>>>more than all the componnents you would need  to buy.
>>
> http://www.n-e-m.com
> 
>>>John Newman
>>>
>>>Gladish Family wrote:
>>>
>>>Been buying motors and inverters from these people for a while
>>
> now...GREAT
> 
>>>people to work with.
>>>Look under the "Inverter Drives" section...If you don't see what you
>>
> need,
> 
>>>give them a call. They don't always list all that they have in stock..
>>>
>>>Good Luck
>>>Mark
>>>
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>>
>>
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> 
> 
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