Stator of a rotating electrical machine

Abstract

The present invention provides a stator for a rotary electric machine that suppresses increases in axial dimensions by lowering axial height positions of connecting wire portions from a coil end. Distributed winding bodies are configured such that a first conductor terminal is made to extend outward at a first axial end of the stator core from a radially innermost position inside slots, and a second conductor terminal is made to extend outward at the first axial end of the stator core from a radially outermost position inside the slots, a plurality of small coil groups are each configured by connecting a plurality of the winding bodies in series by passing crossover portions that are formed by bending the first conductor terminals radially outward axially outside a coil end and joining the crossover portions to the second conductor terminals that are subject to joining, the first conductor terminals that constitute first ends of the small coil group are disposed so as to be spaced apart from each other circumferentially around a radially inner side of a circular arc-shaped region that extends circumferentially around the coil end, the second conductor terminals that constitute second ends of the small coil group are arranged so as to be spaced apart from each other circumferentially around a radially outer side of the circular arc-shaped region of the coil end, and the stator winding is produced by connecting the plurality of small coil groups within the circular arc-shaped region.

Description

technical field [0001] The present invention relates to stators of rotating electrical machines, such as electric motors, generators, etc., and in particular to terminal units comprising busbars connected to phase windings of the stator windings. Background technique [0002] In generators used in EVs (electric vehicles) and PEVs (pure electric vehicles), large currents are passed through the stator windings, so busbars with a large cross-sectional area are used. Therefore, the size of the terminal unit including the bus bars increases, and interference with peripheral parts of the motor occurs. Therefore, a technique for compactly housing the terminal unit near the motor is required. [0003] In view of the above situation, the busbars are arranged in two layers in the vertical direction and arranged in a zigzag or diagonal shape, and the insulating members are used to insulate and cover each busbar to form a wiring unit, thereby realizing the compactness of the wiring unit...

AI Technical Summary

Problems solved by technology

Therefore, the size of the terminal unit including the bus bar increases, causing interference with peripheral parts of the motor. Therefore, a technique for compactly storing the terminal unit near the motor is required.

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