| 摘要 |
PURPOSE:To prevent phase or interphase short circuits among each winding and improve cooling efficiency by deciding the adjoining order of four pairs of winding of each phase of a speed doubling motor lest applied voltage should be overlapped. CONSTITUTION:In the coil end sections of four pairs of winding of each phase of the armature winding of a speed doubling motor, winding is adjoined in the order of A1-B1-C3-A2-B2-C4-A3-B3-C1-A4-B4-C2 from the slot opening side. According to the winding, for example, voltage phase difference between the winding A1 and B1 is 120 deg., one between the winding B1 and C3 150 deg. and one between the winding C3 and A4 150 deg., and there is no period when voltage is applied between adjacent winding at the same time. Thus, phase or interphase short circuits among winding are removed, insulating paper among winding is not required and cooling efficiency can be improved. |
