EDIT: I have modified the attached picture a little bit to prevent confusion

Hi there!

I had a chat with my colleague. He believes that the 3-phase induction motor on the picture (attached file) has 2-poles.
There are 12 slots. Each phase contain 2 coils. I have showed how the coils are connected for the phase W at the bottom.
The waveform belongs to current of each phase. For notations, when the current is entering the slot W1 (crossed symbol in the hand drawing), the same current leaves the slot W2 (dotted symbol in the hand drawing).

So from the waveform, I take a sample of current flows when wt = 0 degree (U1 = 0, W1 = positive, V1 = negative). Using the right hand rule, I founded that there are 6 poles.

I would like to know whether me or my colleague made any mistakes?

Best,
Melon.

 

Appears to have the pole count of a 4 pole motor?

 

Appears to have the pole count of a 4 pole motor?

Could you explain how you count please?

 

May help.

 

Appears to have the pole count of a 4 pole motor?

Well, in your case, yes it's a four pole. But in my case, the number of coils in a phase in half of yours
From the picture, my phase A has only 2 coils (marked by the red highlight), but yours has 4 coils.

 

OK, the number of coils/phase x 2 = pole count.

 

Guys, I got the answer for the question I asked. The distribution of windings' positions are incorrect. (The way I analyzed the number of poles was correct and showed abnormality). Rather, the distribution should be done as the picture below.
According to the right and rule (The thumb is the magnetic field. The rest of the fingers are the current). Please not that 6 adjacent phase zones form 1 pole in the air gap.
For example at 30 degree electrical angle, U, -V, W and -U, V, -W form a south pole.

OK, the number of coils/phase x 2 = pole count.

View attachment 302802

Well after I dug into it, there could be coils/phase = pole count too. From the coil picture (U -U U -U), I could go this way to create 4 poles. Notice that the left most and the right most of the picture are close to each other, since the stator is round.