[RE-wrenches] Outback Chargers

toddcory at finestplanet.com toddcory at finestplanet.com
Mon Feb 10 22:14:18 PST 2014


i would love to see a spectrum analyzer's view of the fx's harmonics. does anyone have this available?
 
interesting (and sad) how silent outback is on this list now.
 
todd
 


 
On Monday, February 10, 2014 9:37pm, "Exeltech" <exeltech at yahoo.com> said:



> Bruce,
> 
> The capacitors may or may not help, and could make things worse.  If you've
> already encountered and solved this exact issue on other identical systems ..
> carry on.
> 
> If not ...
> 
> Switching power supplies have a double-whammy of being non-linear AND reactive. 
> The reactive component is almost always a capacitive "front end" in the power
> supply.  If the predominant issue happens to be harmonics .. then power-factor
> correction capacitors MAY help by filtering out some of the higher frequency
> aspects.  If the predominant issue is the reactive front end of the power supply
> .. caps could make the situation worse.
> 
> As a side-note, PF correction caps connected across the output of an inverter can
> cause the inverter's voltage control loop to go unstable, and blow the inverter. 
> Not a guaranteed failure .. but an enhanced possibility.
> 
> 
> Dan


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