[Milsurplus] Ferro regulated PS for dyno spinner?

[Mike Hanz]

I was thinking of the PP-1104C/G when I wrote the reply, Richard - I 
have a pair for the flight deck.  I never had the problem you describe 
with the ART-13 dynamotors, and it even starts a big 95 amp 28v 400~ 
inverter with ease.  Perhaps some checkout is in order?

On 9/5/2014 4:41 PM, Richard wrote:
> The answer is; maybe.  I have a PP-1104C/G power supply rated 11.5 to 
> 17.5 volts at 100 amps and 28 to 35 volts at 50 amps, 6% regulation at 
> 14 volts and 4% at 28 volts.  It has ferromagnetic feedback.  It 
> starts and runs the 800-1 inverter for the TBW transmitter fine, (55 
> amps at 28 volts key-down) but starting the ART-13 dynamotor results 
> in chattering contactors and relays.  For battery charging or booster 
> battery it would need a reverse current relay or blocking diode.
>
> Richard, AA1P
>
> On 09/05/2014 04:00 PM, Mike Hanz wrote:
>> On 9/5/2014 3:36 PM, Hue Miller wrote:
>>> I scavenged from an abandoned radio site, a GE built, ferroresonant 
>>> 12V 35A DC supply.
>>> It is a heavy sucker, maybe 45 lbs., and even has a choke inductor 
>>> in it.
>>> My question is, what happens when this kind of supply faces the 
>>> heavy start load from
>>> a dynamotor?
>>
>> It usually just grunts...they like a steady load near the rating but 
>> won't flinch from a momentary overload current.  At lower current it 
>> will hum, but that's normal.
>>
>>>   Does it also require a helper battery for dyno starting?
>>
>> Nope - it's brute force at its best.  Heavy iron!
>>
>> 73,
>> Mike
>> ______________________________________________________________
>
> ______________________________________________________________
> Milsurplus mailing list
> Home: http://mailman.qth.net/mailman/listinfo/milsurplus
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Milsurplus at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
>