Induction Motors with Changeable Pole Windings in the Ratio 1:4

International Aegean Conference on Electrical Machines and Power Electronics / Electromotion Joint Conference -- SEP 08-10, 2011 -- Istanbul, TURKEYWOS: 000397196200136The paper presents a new three phase 4 to 16 pole changing winding for an induction motor with 36 stator slots and 6 terminals. The principle of design is explained and the space harmonics are calculated for both of polarities. In order to obtain a higher fundamental winding factor and lower space harmonic content for 16-pole winding, a degree of non-uniformity was accepted for the slot filling factor. The winding is developed partially in single layer and partially in double layers and contains two types of coils wound by different wire diameter. An experimental motor with the new winding was built on a 6-pole base motor in the IEC frame 132 having the rated power of 4 kW for 4-poles (double star) and 1 kW (single star) for 16-poles. The test results have shown the validity of the design. The manufactured motor was modeled using 2D FEM field-circuit method in order to simulate the operation characteristics in the both speeds.Middle E Tech Univ, Bahcesehir Univ, IEEE, IEEE PELS, IEEE Power Engn Soc Elect Machinery Comm, Motor Sub Comm, ABB, Aselsan, Renault, Test One, Opal RTSectorial Operational Programme Human Resources Development of the Romanian Ministry of Labour, Family and Social Protection [POSDRU/89 /1.5/S/62557]The work has been co-funded by the Sectorial Operational Programme Human Resources Development 2007-2013 of the Romanian Ministry of Labour, Family and Social Protection through the Financial Agreement POSDRU/89 /1.5/S/62557