# How to determine winding type of a generator?

I recently asked a question about a component from a wind generator (see my original question).

When looking through the answers, it occurred to me that I really didn't fully understand how the stator was wired. I had just 'assumed' that the 3 phases were on the White, Green and Yellow wires, and were all relative to the Black wire. And that was the assumption I was going to use when connecting them to the 3-phase bridge rectifier. However, mention was made of Y topology and 'wye' topology (probably the same?) but it would be good to get some feedback on

• what topology my generator winding conforms to?
• is my intended connection to the rectifier correct/valid?

What I have done is measure the resistance across all possible pairs, and tabulated below.

Would appreciate someone clarifying the 2 questions above.

Cheers, Mike

Following up on comment below

There's something weird there. You can't have ye-wh = 4.1 ohms and ye-gn-wh = 0.5 + 5.0 = 5.5 ohms. Make sure you're not measuring the resistance of the thermal cutouts. – Transistor 19 hours ago

My measurements did indeed include the thermal cutoff resistance, however, this is only 0.2Ohms on one, and not measurable on the other. However, have now retabulated the results excluding the thermal cutoffs and they're very similar to my original readings.

I've ordered a 3-phase bridge rectifier (SBR2056) - pinout diagram below. I'd appreciate advice on how to connect the stator wires to the rectifier. I'm assuming that the White/Yellow/Green wires are each connected to a separate phase coil, so I would connect these to pins 2, 3 and 4. The DC output would be +ve on pin 1 and -ve on pin 5. So where should I connect the black stator wire to? I'm assuming it would also be connected to pin 5. Is this correct?

I've just found this link Wiring 3-phase bridge rectifier to an article suggesting the neutral can be left unconnected.

Thanks for any help, Mike

• There's something weird there. You can't have ye-wh = 4.1 ohms and ye-gn-wh = 0.5 + 5.0 = 5.5 ohms. Make sure you're not measuring the resistance of the thermal cutouts. Commented Apr 18, 2023 at 7:17