[RE-wrenches] Outback wave form

[Exeltech]

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> 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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