Split stator for electric motor and method for producing the same

Abstract

A split stator for an electric motor includes a core (3) having tooth sections, winding bodies (7) formed around the tooth sections, insulation spacer members (5A, 5B) arranged between the surface ofa tooth section and an inner peripheral section of a corresponding winding body (7) and holding that inner peripheral section with a gap (10) separating it from the surface of the tooth section, and ahighly heat conductive resin filler material placed in the gap (10). The resin filler material is adapted to be able to radiate heat from the inner peripheral sections of the winding bodies (7) to the core (3).

Description

technical field [0001] The invention relates to a split stator for a motor and a stator for a motor using the split stator. In particular, it relates to a split stator for an electric motor and a stator for an electric motor capable of efficiently dissipating heat generated in a winding body of an electric motor to an iron core. Background technique [0002] In a hybrid vehicle or an electric vehicle, an electric motor is used to drive the vehicle. Of course, this driving motor is required to have high output and high efficiency, and furthermore, it is required to be smaller and lighter. Therefore, weight reduction and miniaturization in units of grams and millimeters are required without lowering the output. [0003] A winding body (coil) of a motor is formed by winding a wire around an iron core of a stator. In order to achieve further miniaturization under high output conditions, it is required to increase the space factor of winding bodies such as stators to the limit...

AI Technical Summary

Problems solved by technology

However, this resin insulator has high electrical insulation but low thermal conductivity

As a result, since heat dissipation to the core is hindered, the internal temperature of the winding body tends to rise.

The increase in the internal temperature of the winding body has a bad influence on the insulating coating of the winding, which has the following problems, that is, the insulation performance is reduced, and the output of the motor is reduced or the life of the motor is shortened.

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