Does this have slip rings or is it "Brushless"? Lee Haefele ----- Original Message ----- From: "Norm of Bandersnatch" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Monday, July 28, 2008 12:11 PM Subject: Re: [Liveaboard] Get Home Motor/Generator
> > > > > >> [Original Message] >> From: Ken James <[EMAIL PROTECTED]> >> To: <[email protected]> >> Date: 7/28/2008 1:49:36 AM >> Subject: Re: [Liveaboard] Get Home Motor/Generator >> > > >> Can you send a schematic of the alternator? >> > > > Norm - Sorry, I am not aboard to scan the schematic, but it is a standard > two-bearing alternator. It has many stator wires coming out of it and an > instruction sheet detailing how to connect the wires for many > configurations, some of which are: 120/240 "household style" (which is > what > I use), 240 single phase, 240 3Ph delta, 240 3Ph wye, and several others. > > There are two wires from the exciter stator that are fed by the voltage > regulator (the exciting voltage is around 50-70 volts but I can't recall > if > it is ac or DC). The regulator is a small plastic box with an adjusting > screw to trim the output voltage, which also has a sensing input from the > main stator output. There are several other wires used to set up the > regulator. > > To use the alternator as a motor I would disconnect the regulator, at > least > at first. > >> I suspect a lot of the energizing juice is coming >> from back emf. >> > > Norm - To start I gather the exciter stator must have some residual > magnetism that sends some power to the exciter rotor thence to the main > rotor and back to the regulator in a boot-strap manner. > > >> How would you commutate it? > > Norm - I don't understand the question. > > There is no commutator, it is a brushless alternator, the exciting current > is sent to the main rotor via a the exciter stator, exciter rotor, and > diode array between the exciter rotor and the main rotor. > > If you mean "connect it" I would connect the output lines from the shaft > generator to the output lines of the 8KW genset, then slowly raise the > power to the exciter stator with the Variac. > > If my genset had three phase output I would set up both for three phase > then connect the two together. This would create a rotating magnetic > field > inside the shaft generator. Then I would raise the rotor current with the > Variac so the rotating magnetic field would drag the rotor field around > and > around. > > > > -Ken >> > > > > > > > Norm > S/V Bandersnatch > Lying Julington Creek > 30 07.695N 081 38.484W > > > _______________________________________________ > Liveaboard mailing list > [email protected] > To adjust your membership settings over the web > http://www.liveaboardnow.org/mailman/listinfo/liveaboard > To subscribe send an email to [EMAIL PROTECTED] > > To unsubscribe send an email to [EMAIL PROTECTED] > The archives are at http://www.liveaboardnow.org/pipermail/liveaboard/ > > To search the archives > http://www.mail-archive.com/[email protected] > > The Mailman Users Guide can be found here > http://www.gnu.org/software/mailman/mailman-member/index.html > > > -- > No virus found in this incoming message. > Checked by AVG. > Version: 7.5.526 / Virus Database: 270.5.6/1576 - Release Date: 7/27/2008 > 4:16 PM > > _______________________________________________ Liveaboard mailing list [email protected] To adjust your membership settings over the web http://www.liveaboardnow.org/mailman/listinfo/liveaboard To subscribe send an email to [EMAIL PROTECTED] To unsubscribe send an email to [EMAIL PROTECTED] The archives are at http://www.liveaboardnow.org/pipermail/liveaboard/ To search the archives http://www.mail-archive.com/[email protected] The Mailman Users Guide can be found here http://www.gnu.org/software/mailman/mailman-member/index.html
