TOOTHLESS STATOR CONSTRUCTION FOR ELECTRICAL MACHINES

摘要

A stator construction for a permanent magnet rotor electrical machine (10) eliminates ferromagnetic teeth customarily used and incorporates a winding support (30) made of non-magnetizable, non-conductive material and having radially outwardly extending support fins (32) to support the stator windings (36). The windings (36) are formed of very many strands of fully transposed and insulated fine wire and are continued to the outside of the stator as lead wires (48). Windings (36) for a plurality of different phases are carried in the slots between the fins (32) and insulation strips (38) are provided which separate the phase windings (36) in the slots and which extend beyond the fins (32) to provide insulation between the end turns of the different phase windings (36) as well. To aid in assembly a flux collector (40) which is formed of many laminations (42) and which is generally cylindrical surrounding the windings (36), is split into two half cylindrical parts. A cylindrical insulating layer (41) is interposed between the windings (36) and the flux collector (40). A housing (12) surrounding the stator includes connections (45, 46) to permit flow of a liquid or gas cooling medium through and past the stator windings (36).