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                           AeroElectric-List Digest Archive
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                     Total Messages Posted Mon 05/29/17: 1
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Today's Message Index:
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     1. 08:58 AM - Re: Re: IVO Prop current limiter  (Robert L. Nuckolls, III)
 
 
 
________________________________  Message 1  _____________________________________


Time: 08:58:59 AM PST US
From: "Robert L. Nuckolls, III" <nuckolls.bob@aeroelectric.com>
Subject: Re: AeroElectric-List: Re: IVO Prop current limiter

At 11:06 PM 5/27/2017, you wrote:

>>>with the engine off, the prop and circuit behaved normally.  With 
>>>the engine running, the prop current is shut down almost 
>>>immediately, though a small bit of pitch change does occur prior to cut-off.
>>>
>>>--------
>>>Doug
>
>Could this have something to do with the higher system voltage when 
>the engine is running?

   possibly . . . but I think not. The
   current limiter is configured to 'latch'
   into an OFF state approx 200 mS after
   a current limit on the order of 9A is
   achieved.

   The 'latch' is subject to premature triggering
   if subjected to noise which I suspect is coming
   from the ship's alternator.


Emacs!


   Doug,

   Try tacking this combination of components onto
   your assembly. The experiment is to see if adding
   a smoothing capacitor to the circuit's power
   source will sufficiently attenuate the antagonistic
   energies. The 100 uF cap is the 'smoother' while
   the 10 ohm resistor mitigates inrush currents impressed
   on the circuit when the directional control switch
   closes . . .


   Bob . . .  

 

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