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Rotax 914 Generator, Alternator, Starting and Fuel Pump C

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nuckolls.bob(at)aeroelect
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Posted: Fri Jan 22, 2016 5:28 pm Post subject: Rotax 914 Generator, Alternator, Starting and Fuel Pump C

At 01:54 PM 1/22/2016, you wrote:

  	  Quote: 	
		  One other thing I was wondering .. does it make any difference if the panel breaker on the integrated generator comes before or after the capacitor? 	


    In anecdotal observations over the years, I am

    not convinced that these capacitors across the

    bus on ANY system serve a useful purpose. I

    think it is there because somebody thought it

    was a good idea waaayyyyy back when . . . and I

    might even have agreed with the hypothesis.



    But in several instances of bench testing, I've

    not been able to measure any beneficial effect for

    the capacitor being there.  I'm building a

    drive-stand to run the B&C SD-8 series machines

    on my bench. I'm doing some design studies on

    the next generation of PM rectifier-regulators

    to be offered by B&C.



    The legacy capacitor included in virtually

    every PM alternator architecture will be examined

    in detail with a goal of putting numbers on

    its efficacy.



 



 

   Bob . . .

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