- #1

BlackMelon

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(I have modified the picture a little bit for clarity)

Hi there!

I had a chat with my colleague. He believes that the 3-phase induction motor on the picture below 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, where w is angular frequency (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?Melon.

Hi there!

I had a chat with my colleague. He believes that the 3-phase induction motor on the picture below 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, where w is angular frequency (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?Melon.

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