OK, more complexity more MTBF issues. If the system is for whole house backup
and you need LONG term protection, think "reliability".
The older systems are easy to maintain and service and there is nothing to go
wrong on the AC generation that simple parts you can get will get it back
working. Hummmmm.
My OLDER Generac is 35 years old and running with exception to replace a simple
battery alternator, fan belts and thermal switches that did not fix.
Mel, K6KBE
From: Mark Bayern <m...@mlb.net>
To: Mel Farrer <farrerfo...@yahoo.com>
Cc: Doug Hensley <w...@hotmail.com>; Elecraft List <elecraft@mailman.qth.net>
Sent: Thursday, September 7, 2017 2:16 PM
Subject: Re: [Elecraft] OT: Whole House Generator
I found that Generac has a series of egens they call the 'Synergy'
line. These are variable speed generators. The only variable speed
generators I'm familiar rectify the alternator's output then use PWM
to generate the 60hz 115VAC waveform.
The Honda small portable 1KW and 2KW gens use this system.
Mark
On Thu, Sep 7, 2017 at 3:54 PM, Mel Farrer via Elecraft
<elecraft@mailman.qth.net> wrote:
> I tried to get more information on the "syntergy" process. I know of no
> electrical design of the alternator that allow a non distorted change in
> frequency of the output, However a method of load sensing and a planetary
> transmission with speed selection could do the job of letting the motor run
> slower while the alternator is at constant speed. The 5-12 minute load
> sensing could be the process of the speed selection so that no load is
> affected. Hummm interesting.
> I have a 35 KW diesel Generac and never looked back. It uses the old
> governor method of adjusting engineer fuel/RPM to load. Less load less fuel
> used. OH well.
> Mel, K6KBE
>
> From: Doug Hensley <w...@hotmail.com>
> To: Elecraft List <elecraft@mailman.qth.net>
> Sent: Thursday, September 7, 2017 1:18 PM
> Subject: [Elecraft] OT: Whole House Generator
>
> If you want to respond to this, please respond privately to me and NOT the
> list.
>
>
> I am going through the process of choosing a whole house home generator and
> what caught my ey in the process was a new generator by GENERAC called
> "Syntergy" which uses a new three-vein generator and produces a relatively
> clean sine wave. So clean, GENERAC claims less than 1% harmonic distortion,
> a level virtually undetectable to the user.
>
>
> Has anyone studied this unit and made any conclusions about it? Their
> standard unit produces a minimum of 10% harmonic distortion and they warn
> some communications services might become unuseable.
>
>
> Again, respond to me privately: << w5jv @ hotmail.com >>.
>
>
> Thank you,
>
>
> Doug W5JV
>
>
>
>
>
>
>
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