Topic: testing the stator am i doing it right?

[scottly]

I think you'll find our SOHC4 stators are star wired rather than Delta.  They are tested the same way, though.

"star wired"?? I always thought that was a "Y", or "WYE" configuration. I learn something new everyday..... 

[TwoTired]

I think you'll find our SOHC4 stators are star wired rather than Delta.  They are tested the same way, though.

"star wired"?? I always thought that was a "Y", or "WYE" configuration. I learn something new everyday..... 

More sarcasm?

I'm more familiar with wye, or Y also.  But, star wiring is also correct.  And further, it applies to alternators wired in the same physical configuration but have more than 3 poles/phases.  In fact, alternators can be wired with any number of phases besides 3.  It isn't very common though.

Anyway, for your edification...
http://www.reuk.co.uk/Star-Delta-Wiring-for-Alternators.htm

Would you call the alternator below "Y" or "star" wired?

[scottly]

Would you call the alternator below "Y" or "star" wired?

According to the label, it is a generator, not an alternator. The schematic leads me to believe that it may have brushes, as there are no connections shown between the inner ends of any of the coils. What does this have to do with an SOHC alternator?

[TwoTired]

The inner connections are all common.  It's obvious to those who aren't deliberately obtuse.

generator
1. A machine that converts mechanical energy into electricity to serve as a power source for other machines. Electrical generators found in power plants use water turbines, combustion engines, windmills, or other sources of mechanical energy to spin wire coils in strong magnetic fields, inducing an electric potential in the coils.

As it puts out AC, it is more precise to call it an alternator, but it is also a generator.

[bryanj]

Personaly i would call it two seperate 3 phase generators using a common field rotor in one casing

[Spanner 1]

Cody... maybe that's your problem ( been posted before ) about poor/broken connection under the alt. cover. Test the 3 yellow wires to the stator there to confirm it's good or bad.... make sure the 3 connectors are good and clean first ....

[TwoTired]

Personaly i would call it two seperate 3 phase generators using a common field rotor in one casing

No.  It really is a six phase alternator.  It can drive two, three phase loads independently, or it can drive a 6 phase to 3 phase transformer for the purpose of using commonly available equipment that doesn't require DC conversion.  It was intended for a Wind or Hydro power application.
It was/is experimental, and I don't know if any were actually built.  It was only offered to show that "star" has less limitations than "Y" as a descriptor and is still accurate.

Cheers,

[trueblue]

I think you'll find our SOHC4 stators are star wired rather than Delta.  They are tested the same way, though.

"star wired"?? I always thought that was a "Y", or "WYE" configuration. I learn something new everyday..... 

When I was doing my apprenticeship I was taught that they were star wound and delta wound, to be honest I've never heard of a 'Y' wound alternator.

[j4hfr34k]

Cody... maybe that's your problem ( been posted before ) about poor/broken connection under the alt. cover. Test the 3 yellow wires to the stator there to confirm it's good or bad.... make sure the 3 connectors are good and clean first ....

i was nable to test the stator through the connections under the alternator and it did test ggood, o now i have to find the connectors t unplugged from so i can clean and check them and hoprfully well be bback on the road this weekend.

[j4hfr34k]

Hi Cody..... the yellow wires ( from the stator coil ) should read 0.2 ohms from any one yellow to any other yellow. The reds and greens on the 750A wiring are just 'doubled-up'... so use either red and green.
Need to unplug the 8-way plug behind the airbox to test the stator. Set your dig. meter to the lowest ohms scale and read from yel. to yel. in all combinations. Should be 0.2 ohms. Then unplug the rectifier and do the tests on it with your meter on the' diode' setting.... usually all the way clicked to the left, before off. Some meters beep on this setting which makes it easier .   Beep one way and no beep with red/black leads reversed...... hope this helps 

are the red and green wires on that plug the same as the white and green wires you said to test the field coil?