G2 starter generator

[Mike Mac]

Stik, not sure I know what I'm talking about, it seems like you can regulate resistance by wire gauge. What is the reason for incouraging resistance in a electric circuit? Or not wanting it? Doesn't resistance create heat?

[bigstik40]

Originally Posted by Mike Mac

Stik, not sure I know what I'm talking about, it seems like you can regulate resistance by wire gauge. What is the reason for incouraging resistance in a electric circuit? Or not wanting it? Doesn't resistance create heat?

Mike: You are correct, wire size determines the resistance and yes the goal is usually to have the least amount of resistance as possible. In some cases though, resistance may be desired in order to limit current. The smaller the wire dia. the higher the resistance.

In the case of the gen field of the starter generator, the design calls for a certain number of turns of enameled copper wire. The wire size selected might be the largest dia. wire that yields the turns and fits the space. The resistance then is the result of how long the required wire is and is not selected. In the case of the starter generator it comes to about 5 ohms + or _. If you should ever encounter a low reading here it would indicate that some winding turns have shorted together. It will probably still work but have low output and will draw high current and overheat. Any resistance reading on the high side would probably be infinity indicating an open winding.

Hope this helps - RAY

[Mike Mac]

So what determines wheather the gen. Produces 6-8 or 12 volts? Or 36 for that matter? Number of field windings?

[bigstik40]

Mike:

The generator field winding is designed so the generator puts out 16 - 17 volts when it is connected directly to bat. + and cart running. This is considered "full field" and it will not withstand that continuously (the battery and the field would cook). The starter gen. field coil has the red lead tied to bat. + and the green lead tied to the voltage regulator. When the cart is running, the voltage regulator will tie the green wire to ground until the voltage reaches the set point (14 v or so), then disconnects it. This scenario happens many times a second and increases and decreases in frequency, depending on the charge state of the battery. The charging voltage to the battery is really a pulsing voltage spiking up to 14 v or so, then settling back to battery volts. This pulsing voltage is hard to read on the newer digital vm's because of the pulsing (older analog meters are best for this). As you know, the older carts do this mechanically/electrically and the newer ones do it electronically. Probably more than you wanted to know .

RAY

[Mike Mac]

Thanks Stik!! Food for thought!!

[stevie28]

I'm having similar problems, I have 2 starters and when I check the ohms resistance between the red and green wires, they both read zero. Can this condition be repaired with replacement parts? And, what do we think may be causing the generator side to go bad?