High-energy density permanent magnet motor water cooling system

Abstract

The present invention discloses a high-energy density permanent magnet motor water cooling system. The high-energy density permanent magnet motor water cooling system comprises a stator, stator windings, cooling water pipes and disc pipelines. The cooling water pipes specifically comprise cooling water pipes at a stator yoke, cooling water pipes in centers of stator slots, and cooling water pipes at stator teeth. The cooling water pipes are axially mounted in the slots, teeth and yoke of the motor stator. The disc pipelines are at ends of the motor. Two ends of the cooling water pipes are respectively connected with the two disc pipelines at the ends of the stator. The number of the disc pipelines is two. The water cooling system directly cools main heating parts of the motor, that is, the windings and an iron core, so that the heat dissipation efficiency is greatly improved. The cooling water pipes are simple and have fewer turnings, so that the flow resistance of cooling water is reduced sharply, and the water pressure of a water pump is lowered. The temperature of the motor is distributed more uniformly, the heat dissipation capacity is greatly improved, and further, the torque density of the motor is improved.

Description

technical field [0001] The invention relates to a water cooling system, in particular to a high energy density permanent magnet motor water cooling system. Background technique [0002] At present, the water cooling method used by radial permanent magnet motors is mostly to embed water jackets in the casing around the stator core. The layout is divided into two types: S-shaped water jackets in the axial direction and spiral water jackets in the circumferential direction. The cooling water of the circumferential water jacket has a large contact area with the wall of the water jacket, and the cooling effect is better, but due to the unidirectionality of the water flow, a large temperature gradient will be generated at both ends of the motor, and the heat dissipation will be uneven; the structure of the axial water jacket is relatively simple , easy to manufacture; there is no temperature gradient at both ends of the motor, and the heat dissipation is relatively uniform, but th...

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Problems solved by technology

The cooling water of the circumferential water jacket has a large contact area with the wall of the water jacket, and the cooling effect is better, but due to the unidirectionality of the water flow, a large temperature gradient will be generated at both ends of the motor, and the heat dissipation will be uneven; the structure of the axial water jacket is relatively simple , easy to manufacture; there is no temperature gradient at both ends of the motor, and the heat dissipation is relatively uniform, but there are too many corners in the water jacket at the end, which increases the flow resistance and requires greater external water pressure

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