On that diagram, F1-F2 is the winding in the Rotor. All the U points and the two windings labeled "3" are the primary windings in the housing that give you 110V each, or 220V in series with a center tap, just like power from the utility. Z1 - Z2 is a winding in the housing that is used only for powering the rotor. You don't need a special winding and can power the rotor from one of the primary windings - but you have to lower the voltage a lot and there is enough current that you need a regulated switching power supply, or some kind of big-ass resistor. The Chinese like to put in the extra winding and keep the electronics simple. No argument from me there. "5" is a bridge rectifier that converts the AC coming off the excitation winding to DC to power the rotor. The zigzag thing with green lines and a red cross arrow is a variable resistor. You adjust that to change the output voltage of the primary windings. You probably only need a few ohms of resistance. But that all depends on the design of the thing. Some control circuits will have maybe 3 or 4 resistors already in place and you connect to the one(s) that give the closest output voltage. Very low-tech :-) Personally, I would try to avoid disconnecting the excitation voltage then the thing is spinning.
-Dave Walton On 9/20/07, Jim Cathey <[EMAIL PROTECTED]> wrote: > > You don't need anything fancy to control the excitation voltage. I've > > seen everything from a diode and a resistor, to a microprocessor board > > with fuzzy logic that also controls the throttle. Here is a basic > > troubleshooting guide: > > > > http://utterpower.com/Trouble.htm > > Thanks, I'd already found that guide, which was helpful. The thing > I don't understand is the two different excitation windings that seem > to feed the regulator. > > > FYI - I have a 15kw China Genset and get 15 ohms between the rings on > > the rotor. I show no reading (infinite resistance) between the rotor > > winding and ground. > > Yeah, I suspect that there's something wrong there. > > -- Jim > > > _______________________________________ > http://www.okiebenz.com > For new parts see official list sponsor: http://www.buymbparts.com/ > For used parts email [EMAIL PROTECTED] > > To Unsubscribe or change delivery options go to: > http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com > _______________________________________ http://www.okiebenz.com For new parts see official list sponsor: http://www.buymbparts.com/ For used parts email [EMAIL PROTECTED] To Unsubscribe or change delivery options go to: http://okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
