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noise suppression

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aeronca2(at)99main.com
Guest

Posted: Thu Apr 15, 2010 6:36 am Post subject: noise suppression

Installation instructions for a 12volt, 8amp wind  driven generator specify shielding on the output lead with no other noise  suppression requirements. Electrical system schematics for later models of the  aircraft, having engine driven generators, specify 0.01 microfarad capacitors on  the armature and stator leads. On the wind driven generator, the regulator is  housed within the generator unit and the only external wires are the output and  ground leads.

 Should a capacitor be installed on the wind driven  generator output lead at the generator terminal for noise suppression in  addition to the original shielding requirement? If a capacitor is recommended,  it must be weather resistant. Therefore, please advise on part number and source  information if a capacitor is recommened.

 Thanks for any input to my question and  request.

  

   [quote][b]

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nuckolls.bob(at)aeroelect
Guest

Posted: Thu Apr 15, 2010 7:49 am Post subject: noise suppression

At 09:31 AM 4/15/2010, you wrote:



  	  Quote: 	
		   Installation instructions for a 12volt, 8amp wind driven generator specify shielding on the output lead with no other noise suppression requirements. 	


   Shielding of such leads is a pointless effort. Any

   noise produced by the generator will be CONDUCTED along

   its power feed wire, not electro-statically coupled to

   other potential victims.



  	  Quote: 	
		   Electrical system schematics for later models of the aircraft, having engine driven generators, specify 0.01 microfarad capacitors on the armature and stator leads. On the wind driven generator, the regulator is housed within the generator unit and the only external wires are the output and ground leads.

 Should a capacitor be installed on the wind driven generator output lead at the generator terminal for noise suppression in addition to the original shielding requirement? If a capacitor is recommended, it must be weather resistant. Therefore, please advise on part number and source information if a capacitor is recommened.

 Thanks for any input to my question and request. 	


   Try it and see. The responsible supplier will 

   conduct noise tests in a lab and supply

   necessary noise suppression technology as 

   part of the product. If the as-delivered

   generator didn't come with filters (and they're

   not called out on installation instructions) then

   an assumption follows that no filtering is

   needed.



   Some rudimentary flight-testing after installation

   will go to proving/disproving that assumption.

   Come back to this discussion with your findings

   if indeed the critter turns out to be noisy.



   Bob . . .     [quote][b]

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aeronca2(at)99main.com
Guest

Posted: Thu Apr 15, 2010 8:03 am Post subject: Noise suppression

Installation instructions for a 12volt, 8amp wind  driven generator specify shielding on the output lead with no other noise  suppression requirements. Electrical system schematics for later models of the  aircraft, having engine driven generators, specify 0.01microfarad capacitors on  the armature and stator leads. On the wind driven generator, the regulator is  housed within the generator unit and the only external wires are the output and  ground leads.

 Should a capacitor be installed on the wind driven  generator output lead at the generator terminal for noise suppression in  addition to the original shielding requirement?

 If a capacitor is recommened, it must be weather  resistant. Therfore, please advise on part number and source information if a  capacitor is recommened.

 Thanks for any input to my question and  request.

 Hugh Loewenhardt

 aeronca2(at)99main.com (aeronca2(at)99main.com)

 restoring Fairchild 24C8C, N15076 

 Stonington, Ct

   [quote][b]

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