Stator for electric rotary machine

Abstract

The invention provides a stator (10) for an electric rotary machine which can be reduced in size by suppressing the projection of extending portions in the axial direction and which can enhance the performance thereof by suppressing the copper loss as a result of the length of the extending portions being reduced. The stator (10) includes: a stator core (21); and segmented coils (50) of a plurality of phases, wherein: the segmented coils (50) of a plurality of phases have pluralities of coil bars (25) which are inserted individually in a plurality of slots (23) in the stator core (21) and which extend substantially in a straight line and pluralities of connection coils (40) which connect together the coil bars (25) of the same phase to thereby make up extending portions; the connection coils (40) each comprise an inner connection coil (42) and an outer connection coil (41) which are disposed in different axial positions; and the inner connection coil (42) faces an outer connection coil (41) of a different phase in an axial direction and the outer connection coil (41) faces the inner connection coil (42) of a different phase in the axial direction.

Description

technical field [0001] The present invention relates to a stator of a rotating electrical machine mounted in an electric vehicle, a hybrid vehicle, or the like. Background technique [0002] Conventionally, as a stator of a rotating electrical machine manufactured using segmented coils, there is known a stator of a rotating electrical machine in which a plurality of segments composed of U-shaped electrical conductors are inserted into the slots of the stator core, and the leg portions are bent. , and join the ends of the segments to form a coil (for example, refer to Patent Documents 1 and 2). [0003] [Patent Document 1] Japanese Patent Laid-Open No. 2003-158840 [0004] [Patent Document 2] Specification of US Patent No. 6894417 [0005] The stators of the rotating electric machines for vehicles described in Patent Documents 1 and 2 form coils by U-shaped forming of electrical conductors, bending of legs, and joining (welding) of end portions. Therefore, the end portions...

AI Technical Summary

Problems solved by technology

Therefore, the end portions of the electric conductors are joined together in a state protruding in the axial direction, the stator becomes larger in the axial direction due to the transition portion, and the length of the transition portion becomes longer, so there is room for improvement.

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