Re: Phase converter puzzle!

I

Think 9 volt "transistor battery". Thats enough DC for the solid state
switch I use. I told you about this several months ago. I know the
concept isnt too complex for you to have grasped. I think I have failed to
be sufficiently clear with my communications.
All thats needed ot build the RPC is a switch to connect the 220 single
phase to the idler, and a start button to momrntarily insert a capacitor
from the input single phase line to the unfed leg of the motor.
A rotary phase converter with a1 HP idler will normally spin up an
*unloaded* 10 HP tool motor. That 10 HP tool motor will perform equally
as well with that 1 HP idler as with true 3 phase whenever the tool is
loaded to 5 HP or less.

Jerry



"Ignoramus4384" <ignoramus4384@xxxxxxxxxxxxxxxxxxx> wrote in message
news:d8IMe.71229$6N6.59841@xxxxxxxxxxxxxxxxxxxxxxxx
> On Wed, 17 Aug 2005 08:12:30 -0500, Robert Swinney <judybob@xxxxxxxxxxx>
> wrote:
>> Thanx, Jerry! Hey, Iggy - take a look.
>
> Thanks, they are interesting. Using them would mean that I need to
> also add some DC power supply to the converter. Anyway, I will give it
> a serious thought. At this point, common sense suggests that the most
> likely cause of the trouble is bad caps.
>
> i
>
>> Bob Swinney
>>
>> "Jerry Martes" <j.jmartes@xxxxxxxxxxx> wrote in message
>> news:STxMe.7521$Xw5.3803@xxxxxxxxxxx
>>>
>>> Bob
>>>
>>> I had already stocked up on the solid state switches at All Electronics
>>> while they had hundreds of "take outs" at about $2.00 each. I dont see
>>> any in the most recent All Electronics (www.allelectronics.com) catalog.
>>> Marlin P. Jones (www.mpja.com) shows some 25 amp, 280 VAC solid state
>>> switches at $11.95 each.
>>>
>>> Jerry
>>>
>>>
>>>
>>> "Robert Swinney" <judybob@xxxxxxxxxxx> wrote in message
>>> news:TJqdnZ2dnZ2uwZy-nZ2dnc8Fn96dnZ2dRVn-zp2dnZ0@xxxxxxxxxxxxxx
>>>> Iggy sez: "I am quite interested, do you know of a web address where I
>>>> could see
>>>>> these switches?"
>>>>
>>>> How about it, Jerry? Is there a web site that you know of? What are
>>>> some of the exact specs; and are they available from some of the chip
>>>> houses, National, maybe?
>>>>
>>>> Bob Swinney
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> "Ignoramus23305" <ignoramus23305@xxxxxxxxxxxxxxxxxxxx> wrote in message
>>>> news:KtwMe.34659$9o2.3819@xxxxxxxxxxxxxxxxxxxxxxxx
>>>>> On Wed, 17 Aug 2005 01:20:27 GMT, Jerry Martes <j.jmartes@xxxxxxxxxxx>
>>>>> wrote:
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> "Robert Swinney" <judybob@xxxxxxxxxxx> wrote in message
>>>>>> news:7Ladnahqzech4J_eRVn-jQ@xxxxxxxxxxxxxx
>>>>>>> Jerry sez:
>>>>>>> "> My personal favorite method of spinning up an idler is to
>>>>>>> momentarily
>>>>>>>> connect the capacitor from one of the 220 lines to the "unfed
>>>>>>>> winding"
>>>>>>>> using a solid state switch. The switches cost $12 at Marlin P,
>>>>>>>> Jones.
>>>>>>>> Any big relay can be used to momentarily connect the capacitor,
>>>>>>>> There
>>>>>>>> is a high degree of arcing associated with disconnecting the
>>>>>>>> capacitor,
>>>>>>>> so 'oversized' realys are desired."
>>>>>>>
>>>>>>> Do these solid state switches operate at "zero crossing" time? I am
>>>>>>> guessing they are similar to those used in high $ "switched
>>>>>>> capacitor"
>>>>>>> rotary phase converters such as the Booster brand seen on Metal Web
>>>>>>> News.
>>>>>>>
>>>>>>> Bob Swinney
>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>> thanks
>>>>>
>>>>> i
>>>>>
>>>>
>>>>
>>>
>>>
>>
>>
>
>
> --
>


.

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