multiple SW inverters on a small AC source [RE-wrenches]

[jay peltz]

Hi Hugh,

One suggestion if the Trace keeps droping out is to run the hydro into a
battery charger- sort of a huge UPS system.  That way you'll have a constant
load on the hydro at all times, no dropouts.

I think you're correct in the drop outs with out really quick regulation.

have fun!

jay
Peltz Power

hugh piggott wrote:

> Jay
> >
> >Should work no problem.  Just make sure you set the AC2 size carefully so
> >you don't overload it.  Then when the loads on the inverters is larger
> >than the AC2 input, the inverter will help it.
>
> thanks for the reassurance, that is how I plan to run it, but theory
> is often different from practice.  I have connected 2 sw2512's to a
> 15kVA genset before but this is a smaller source and I worry about
> instability.  A friend who knows a bit about control systems tells me
> that the inverter current regulator softwares will interact through
> the common supply voltage.  I hope he is wrong.
>
> >I'm curious, what type of regulation are you using?  Killer site!
>
>   I plan to use an induction motor with capacitor compensation (I have
> good experiences with this).  The regulators I use are very nice PWM
> voltage regulators made by Smith Associates for the purpose.
>
> I also worry about the power factor implications of using induction
> motors with the trace sw's.  If you change the power factor the
> frequency of the hydro will also change.  On those induction motor
> systems a motor start (fridge etc) can hit the capacitors and reduce
> excitation of the motor, leading to slight overspeed and thus a shift
> in frequency.  This might result in the Traces rejecting the AC
> source.
>
> It'll be fun anyway :-)
> --
> Hugh
>
> Scoraig, Scotland
> http://www.scoraigwind.co.uk
>
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____________________________________________________________
T O P I C A  -- Learn More. Surf Less. 
Newsletters, Tips and Discussions on Topics You Choose.
http://www.topica.com/partner/tag01