4-pole pws winding

[zlatkodo]

Does anyone have an example of internal connection diagram for 4 pole PWS (part winding start)three-phase motor with divided windings in (33% + 67%) and (60% + 40%) ratio?
Zlatkodo

 

[zlatkodo]

The first part of my question might be:
How to make a 4 pole winding with 3 circuits?
Zlatkodo

 

[petronila]

Hi Zlatkodo

The connection is 3Y (Y + 2Y), 1/3 = Y and 2/3 = 2Y.

Attached you will find the winding diagram.

Regards

Carlos

 

[zlatkodo]

Thanks, Carlos,
Note that effective number of turns in each circuit must be the same.
Zlatkodo

 

[zlatkodo]

Note: These windings are widely used in motors of refrigerant compressors.
Zlakodo