Heat pipe, rotor, and rotary electric machine

Abstract

A heat pipe which can effectively achieve cooling in an environment in which high centrifugal force plays a role, a rotor, and a rotary electric machine are provided. The rotor (4) includes: a rotor core (41); a magnet (43) that is arranged along an axial direction of a central axis of the rotor core (41); and a heat pipe (6) that is arranged around the central axis of the rotor core (41), wherein the heat pipe (6) includes: an operation liquid that is provided in an internal space of the heat pipe (6) and that allows heat to move via evaporation and condensation; a heated part (62) that extends so as to be parallel with the central axis, that receives heat from the magnet, and that is heated; and a cooled part (61) that is arranged on one side in a longitudinal direction of the heated part and that is cooled, wherein the cooled part (61) is slanted away from the central axis of the rotor core (41) in a direction from the one side in the longitudinal direction of the heated part (62) toward another side in the longitudinal direction of the heated part (62).

Description

technical field [0001] The invention relates to a heat conducting pipe, a rotor and a rotating electrical machine. Background technique [0002] Conventionally, rotating electrical machines have been used as power sources for hybrid and electric vehicles. In a rotary electric machine, a magnetic field is formed in a stator core by supplying a current to a coil, and a magnetic attraction force and a magnetic repulsion force are generated between a permanent magnet of the rotor and the stator core. Thus, the rotor rotates relative to the stator. [0003] It is known that the temperature of a permanent magnet rises due to heat generated by eddy currents, heat received from a coil, and the like. When the temperature is higher than the specified temperature, the magnetic force of the permanent magnet sometimes decreases. Therefore, various techniques for cooling the permanent magnets are proposed. [0004] For example, Japanese Patent Application Laid-Open No. 2007-124805 des...

AI Technical Summary

Problems solved by technology

[0006] However, in the techniques described in the above-mentioned JP-A-2007-124805 and JP-A-2008-511271, since a heat transfer tube based on the capillary phenomenon is used, when the heat transfer tube is subjected to a strong centrifugal force, under, it may not be able to cool effectively

Therefore, in the prior art, there is a problem in providing heat transfer pipes, rotors, and rotating electric machines that can effectively cool in an environment where strong centrifugal force acts.

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