This new variety of Generac's are obviously all the new "Inverter" type generators, because in order for a non-invertor type to make 60 Hz AC power, it HAS to run at some multiple of 60Hz, typically 3600 RPM constant speed.
The ONLY way the engine speed can vary is to utilize an SS circuit to generate the required 60 HZ sine wave. I currently have a Honda EU7000 set up in an "almost" automatic running mode. I have to manually start the generator and hit a push-button which energizes a big transfer switch so certain circuits in the house go from mains to generator. When commercial power is restored for at least a continuous minute, the system reverts back to mains power. I then have to manually shut off the generator. Glad to see Generac moving to this type. It should make your UPS systems much happier. 73, Charlie k3ICH'' -----Original Message----- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Mark Bayern Sent: Thursday, September 07, 2017 5:16 PM To: Mel Farrer <farrerfo...@yahoo.com> Cc: Elecraft List <elecraft@mailman.qth.net>; Doug Hensley <w...@hotmail.com> 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 > > > > > > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net Please help support this email > list: http://www.qsl.net/donate.html Message delivered to > farrerfo...@yahoo.com > > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net Please help support this email > list: http://www.qsl.net/donate.html Message delivered to > plcm...@gmail.com ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to pin...@erols.com ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
