[ARC5] BC-455 adventure

[J. Forster]

This is not a simple question. It depends on how the dynamotror is built.
I'll do the analysis, but first need to know:

Is the dynamotor Shunt or Compund wound? It makes a big difference.


In a Shunt wound the motor field coil is directly in parallel with the DC
supply.

(In a Series wound, the motor field is in series with the armature. I know
the dynos are not this type.)

In a Compound wound, there is a Series field and a Shunt field.

It has to be a Shunt or Compound machine.

Best,

-John

===================






> On Sat, Jun 16, 2012 at 12:37 PM, David Stinson <arc5 at ix.netcom.com>
> wrote:
>
>>
>> I recommend running the receiver at under 200 VDC,
>> Preferably 90-140 VDC or so.
>> You won't notice much difference in performance,
>> but those 70-year-old parts will thank you.
>>
>
> Speaking of which, is there a reasonable way to run them with the original
> dynamotor? I seem to recall something about reduced voltage/RPM not being
> a
> good thing? I've probably asked this before, just don't remember the
> answer. Old age 'n all that....
>
> ~ Todd,  KA1KAQ/4
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