[RE-wrenches] Outback wave form

[Mac Lewis]

Wrenches, regarding installing these capacitors in parallel with the load,
how do you size the capacitor, from a input current or power perspective,
and also a capacitance rating perspective?


On Wed, Apr 17, 2013 at 1:51 PM, Exeltech <exeltech at yahoo.com> wrote:

> Wrenches,
>
> While the addition of a capacitor may resolve issues associated with
> various
> inverter/appliance/motor combinations, please make sure the capacitor(s)
> get
> switched OUT of the circuit (disconnected) when the load itself is
> disconnected.
>
> Failure to do so could under some circumstances cause the inverter
> control-loop
> circuitry to go unstable, leading to unpredictable inverter operation, and
> possible
> damage/failure in the power system.  Disconnecting the capacitor with the
> load
> alleviate this possibility.
>
>
> Regards to all...
>
>
> Dan Lepinski
>
>
>
> --- On *Wed, 4/17/13, Larry Crutcher, Starlight Solar Power Systems <
> larry at starlightsolar.com>* wrote:
>
>
> From: Larry Crutcher, Starlight Solar Power Systems <
> larry at starlightsolar.com>
>
> Subject: Re: [RE-wrenches] Outback wave form
> To: "RE-wrenches" <re-wrenches at lists.re-wrenches.org>
> Date: Wednesday, April 17, 2013, 2:09 PM
>
>
> We experience issues like this from time to time. PF seems to be the
> culprit. Have you measured it or looked at the waveform yet?  How an
> inverter deals with PF seems to vary broadly. For example, the Splendide
> XC2100 washer/dryer will not work on a Magnum Energy and a few other sine
> wave inverters. However,  it will run on a low cost GoPower or Samlex sine
> wave inverter. Below is a scope trace of voltage/current of the Magnum
> inverter & Splendide washer. Upper trace is voltage
>
>
>
>
> By adding a 50uF run capacitor inline, it somewhat tames the current phase
> and the sine wave so the Magnum can operate the washer.
>
>
>
> (Special thanks to Al for the discovery and photos)
>
> Larry Crutcher
> Starlight Solar Power Systems
>
>
> On Apr 16, 2013, at 9:46 AM, All Solar <allsolar at scswifi.net<http://mc/compose?to=allsolar@scswifi.net>>
> wrote:
>
> Have a client with a new coffee maker that will not run from their new
> dual outback setup. Has anyone heard of this lately. We have had no
> problems with appliances and sine wave inverters. What to look for?
>
> Sent from Jeremy's IPhone.  Sorry for typos and shorthand!
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-- 



Mac Lewis

*

"Yo solo sé que no sé nada." -Sócrates
*
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