| Author |
Message |
Gene Lewis (Genelewis)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, May 27, 2006 - 10:45 pm: | |
Have a friend who has just purchased an MCI 9 and wants to make use a "Motor-Gen" in it.
Would appreciate fellow busnuts info on what a "Motor-Gen" is. Has anyone used one of these in there conversion?
Your thoughts are appriciated.
enjoying the journey in NC,
gene |
Bob Wies (Ncbob)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, May 28, 2006 - 5:46 am: | |
Hi Gene,
Where in NC? There are a bunch of us BusNuts in the Tarheel State...where are you?
NCbob |
Bob Wies (Ncbob)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, May 28, 2006 - 5:50 am: | |
Hi Gene,
Where in NC? There are a bunch of us BusNuts in the Tarheel State...where are you?
He may be referring to something I ran across years ago..a DC motor coupled to an AC motor used to generate 115-120 VAC to run reefers. Due to the frequency sensitivity of todays appliances (60Hz) it may or may not work depending on the speed of the DC (or belting ratio) motor.
NCbob |
Bill K
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, May 28, 2006 - 7:59 am: | |
Gene: I think he is talking about a Mo Gen, In short a motor generator, There was one of these in my bus when I bought it. They do produce a pure sin wave, but also the down fall is using to much electric to run. A inverter is a much better application for a bus, I now have my mo-gen installed in my pickup work truck for those time when I need 110 to run a drill or ect. and I only installed it because it was just setting there gathering dust, maybe this way it will get some use. |
Stan
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, May 28, 2006 - 9:02 am: | |
Before modern inverters, aircraft and military made extensive use of motor-generators. These were a DC motor and AC alternator mounted on a common shaft with a mechanical governor to maintain the required frequency.
Honeywell made two units for the domestic market (IIRC a 500 watt and a 1500 watt) that were used in high end motorhomes.
After saying all that, I expect your friend is wanting to install a gas or diesel engine driven AC alternator. Almost all bus conversions use one of these to supply electricity that is comparable to what you get from the electric utility in your home.
If you have more specific questions feel free to ask. |
Stan
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, May 28, 2006 - 9:11 am: | |
After posting, I noticed that you already have a conversion so already knew about gensets. Another possibility you friend may be talking about is a genertor that runs on the bus engine and feeds DC voltage into an inverter to produce 120 volt 60 hz regardless of motor speed. I believe this is basically what the Onan Quiet Gen is, only as a stand alone unit. |
Gene Lewis (Genelewis)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, May 28, 2006 - 11:19 pm: | |
Thanks for all the input on the Motor Gen. I am awaiting an e-mail that will have the moden #, etc on his unit. May have more ???'s when that info arrives.
Bob, I am in Monroe,NC(just E of Clt). Have been around this board for a while and seen a lot. IMHO it's THE BEST. I check it several times a day.
Thanks for your interest.
Enjoying the journey in NC,
Gene Lewis ~05 Eagle~ |
John Jewett (Jayjay)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, May 28, 2006 - 11:22 pm: | |
I occasionally run across a motor-generator at flea markets, besides being inefficient, many of them are "pulls" from old military equipment and are 400 to 650 HZ (cycles per second) They provide a really nasty shock due to the high frequency. DO NOT get around one if you have a pacemaker since they have a really strong emission factor. Cheers...JJ |
Richard Bowyer (Drivingmisslazy)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, May 29, 2006 - 9:31 am: | |
NCbob, snip "a DC motor coupled to an AC motor used to generate 115-120 VAC to run reefers"
I do not believe the DC motor was coupled to an AC motor. It was more probably coupled to an AC alternator or AC generator.
JJ, snip "They provide a really nasty shock due to the high frequency".
In over 50 years of working on all types of frequency converters, and particularly 400 hertz for the old mainframe computer industry, this is the first time I have ever heard this. Since many of these units were high voltage, 208 or 415 vac, are you sure it was not just the high voltage?
BTW, the industry standard frequencies are 400 hertz for the synchronous motor gen sets and 415 hertz for the induction mg sets.
Richard |