Counting motor poles
Counting motor poles
(OP)
Hi guys & gals!
Could someone please clarify this for me......
Motor Poles,
I think I am confused. A motor pole is not necessarily one winding is it? If it were then surely a three phase motor can have a minimum of 3 poles not 2 as there is a minimum of three windings inside.
I have a diagram here with a Y connected supply and this is meant to be a 2 pole motor but I cannot understand where the poles start and end!!
Any help would be appreciated.
Thanks
Kev
Could someone please clarify this for me......
Motor Poles,
I think I am confused. A motor pole is not necessarily one winding is it? If it were then surely a three phase motor can have a minimum of 3 poles not 2 as there is a minimum of three windings inside.
I have a diagram here with a Y connected supply and this is meant to be a 2 pole motor but I cannot understand where the poles start and end!!
Any help would be appreciated.
Thanks
Kev





RE: Counting motor poles
RE: Counting motor poles
Typically, Yes. A two pole motor has a North winding (group) & South winding (group). And the reason I say typically is there are whats called "consequent pole" motors. Which I doubt you have.
If it were then surely a three phase motor can have a minimum of 3 poles not 2 as there is a minimum of three windings inside.
There is a minimum of SIX in a three phase motor. Three phases, multiplied by two poles, equals six GROUPS.
I have a diagram here with a Y connected supply and this is meant to be a 2 pole motor but I cannot understand where the poles start and end!
Are the leads numbered?
What leads have continuity?
RE: Counting motor poles
RE: Counting motor poles
The reason for the terminology 2-pole comes not from looking at the electrical side (how are the windings arranged) but from looking at the magnetic side.
A 2-pole motor has a rotating field with two magentic poles (N and S if you will). We can in theory produce that same type of magnetic pattern with a variety of windings, 3-phase, single-phase (has a forward and reverse rotating field... each two pole)4-phase (if it existed) etc.
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RE: Counting motor poles
Motors = Extremely complex subject!!!!!!
thanks again it was a great help
Kev