Lister Engine Forum

Lister Engines => Lister Based Generators => Topic started by: rocket on February 17, 2006, 03:08:49 AM

Title: 900 rpm 8 pole genhead
Post by: rocket on February 17, 2006, 03:08:49 AM
i think the sweet spot would be a twin cylinder lister running 900 rpm directly coupled to an 8 pole generator head. i have searched but not found such a beast. i think 10kw-15kw size would be ideal. any thoughts?
Title: Re: 900 rpm 8 pole genhead
Post by: SHIPCHIEF on February 17, 2006, 03:21:38 AM
I agree.
Unfortunatly, most are built for large medium speed diesels, around 1000 HP and up.
I was wondering if I could make one, like those windpower guys at otherpower-dot-com.
Wind my own coils, use Neodium magnets, etc. to increase the efficiency- both in the electric end and less loss in the drive.
Scott E
Title: Re: 900 rpm 8 pole genhead
Post by: cujet on February 18, 2006, 12:39:19 PM
As you might guess, you can make a generator head yourself ALA wind power guys. The problem comes with achieving a good sine wave. At this point, it may be easier to drive a low speed direct drive PMG and charge batteries for an inverter system.

Chris
Title: Re: 900 rpm 8 pole genhead
Post by: emerald on February 18, 2006, 02:32:53 PM
I have been building wind turbines for the last 15 years, all have PMG alternators and all are 3 phase (for best efficiency). Typically the RPM they operate at is much lower than a CS. But is no big deal to modify the base design for a CS, the additional benefits of direct drive and eliminating transmissions losses are worth it.

Most people use wind turbines for charging battery banks, the sine wave is less then, but you can still achive a decent sine wave with good engineer discipline. After all, this is a science and most here are good with their hands/brain.

With PPM you get the most from your engine, there is no loss due to field coils or excitation, whatever you wish to call it. In wind applications every watt is precious. With an old CS running off grid, I would keep the same things in mind and spend the time to get every watt you can. If it is done once, and done right, you never again have to touch it. no communtator to wear and far less noise too.

Food for thought perhaps, and hope this is of use to some of you.

Emerald
Title: Re: 900 rpm 8 pole genhead
Post by: SHIPCHIEF on February 18, 2006, 04:20:14 PM
Thanks;
  I agree. You windpower guys have spent alot of time and effort to find out the correct number of turns and gauge of wire etc.
 The investment in time and materials is considerable.  Each item gets built, operated, evaluated, and adjusted or modified. It's a never ending process as long as one stays interested. We could do it too. Right now I am spending my time rebuilding my engine and mount frame.
  My hands are all beat up from appeasing the angry gods of diesel. My wife says she is going to name it Rose, because I tell her roses are co-dependant abusers that take all your love and attention, then turn around and hurt you with thorns at the first chance. :'(
Scott E
Title: Re: 900 rpm 8 pole genhead
Post by: hotater on February 19, 2006, 03:51:14 AM
I've found roses to be more trouble than they're worth....

....wives, too.   ;D
Title: Re: 900 rpm 8 pole genhead
Post by: SHIPCHIEF on February 24, 2006, 02:15:07 PM
I keep saying that this wife is the last one......She says She better be!
Title: Re: 900 rpm 8 pole genhead
Post by: rocket on February 24, 2006, 02:29:44 PM
i am a strong supporter of polygamy
Title: Re: 900 rpm 8 pole genhead
Post by: GuyFawkes on February 24, 2006, 02:32:21 PM
why buy a book when you can go to the library?
Title: Re: 900 rpm 8 pole genhead
Post by: rocket on February 24, 2006, 03:02:13 PM
i perfer to own my own library and stay in reading all night  :P
Title: Re: 900 rpm 8 pole genhead
Post by: Joe on February 24, 2006, 10:03:40 PM
My wife says she is OK with polygamy...knowing full well what it would be like to find five more women that would put up with me.... ;)
Title: Re: 900 rpm 8 pole genhead
Post by: rocket on February 25, 2006, 12:00:16 AM
or 5 more lister wives  ;)

the only bad part of all that reading i do is the cost for the overdue books .... but i do love all the children