Re: (ET) field rev.

["Konstanty, Walter \(GE Indust, ConsInd\)" <Walter Konstanty ge com>]

Flipping both runs the same direction.
Flipping the armature requires the series field to be reversed.
Flipping the field requires the series field to be reversed.
Flipping just the series makes it a differential compound motor (series 
subtracts from main field) and speed raises in forward which may overheat 
motor but provides more speed/less torque.

Makes sense to me.  
...Walt

-----Original Message-----
From: elec-trak-bounces cosmos phy tufts edu
[mailto:elec-trak-bounces cosmos phy tufts edu]On Behalf Of Tim Humphrey
Sent: Friday, July 14, 2006 10:30 AM
To: elec-trak cosmos phy tufts edu
Subject: Re: (ET) field rev.


That's why I suggest to swap all polarities.

The series portion will still run in the same direction but the shunt 
portion will now be reversed in relation to the
series field thus reversing the series shunt relationship, now allowing 
the reduction of power in reverse instead of
forward.

Or should only the series connections be reversed? Now that I think about 
it this might be the proper fix action.

What we're trying to do is reverse the speed regulation effect.


-- 
Stay Charged!
Hump
"Ignorance is treatable, with a good prognosis. However, if left 
untreated, it develops into Arrogance, which is often
fatal. :-)" -- Lee Hart



>
>
> -----Original Message-----
> From: elec-trak-bounces cosmos phy tufts edu
> [mailto:elec-trak-bounces cosmos phy tufts edu] On Behalf Of Konstanty,
> Walter (GE Indust, ConsInd)
> Sent: Friday, July 14, 2006 10:07 AM
> To: Tim Humphrey; elec-trak cosmos phy tufts edu
> Subject: Re: (ET) field rev.
>
> Reversing the field and armature makes the motor run the same way.  It's 
> the
> relationship of one to the other so only one is reversed.
> On a compound motor, the speed regulation changes due to series field
> effect.
>
> ...Walt
>
> -----Original Message-----
> From: elec-trak-bounces cosmos phy tufts edu
> [mailto:elec-trak-bounces cosmos phy tufts edu]On Behalf Of Tim Humphrey
> Sent: Friday, July 14, 2006 10:03 AM
> To: elec-trak cosmos phy tufts edu
> Subject: Re: (ET) field rev.
>
>
> Reverse the polarity of all of your motor connections. See what that 
> does.
> Please report back the results.
>
> I'll do the same with my test motor this weekend to verify my suspected
> results if you would rather wait.
>
>
>
>
> --
> Stay Charged!
> Hump
> "Ignorance is treatable, with a good prognosis. However, if left 
> untreated,
> it develops into Arrogance, which is often fatal. :-)" -- Lee Hart
>
>
>>
>>
>>   _____
>>
>> From: elec-trak-bounces cosmos phy tufts edu
>> [mailto:elec-trak-bounces cosmos phy tufts edu] On Behalf Of Ferguson
>> Apiaries
>> Sent: Thursday, July 13, 2006 5:55 PM
>> To: elec-trak cosmos phy tufts edu
>> Subject: (ET) field rev.
>>
>>
>> I have a New Idea 15 that I converted.  Got fed up with the controls so
> made
>> my own.  I have a simple controller for the armature and 4 switches 
>> hooked
>> up to the original resistors for the field.  My question is when I have 
>> it
>> in high and least resistance to the field and put it in reverse it just
>> speeds up by about 50%, why?  Nice feature though.
>> Ferguson Apiaries
>> Hensall, On
>> http://www.fergusonapiaries.on.ca <http://www.fergusonapiaries.on.ca>
>> http://www.oneplace.com/ministries/grace_to_you/
>> <http://www.oneplace.com/ministries/grace_to_you/>
>>
>>
>
>
>
>
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