Water cooling structure of axial segmentation inner stator of outer rotor hub motor

Abstract

The invention relates to the technical field of hub motors, in particular to a water cooling structure of an axial segmentation inner stator of an outer rotor hub motor. The structure comprises the axial segmentation inner stator, a radial radiation type waterway cooling disc, an axial connection cooling pipe, a stator bracket and a fastening pressure disc. According to the present invention, the stator adopts an axial segmentation structure, the radial radiation type waterway cooling discs are arranged between every two adjacent blocks, cooling water cools the segmented stator through the radial radiation type waterway cooling discs and the axial connection cooling pipes, waterways can make full contact with the wall face of a stator iron core, and heat dissipation is improved; the temperature rise of the stator iron core and the winding is low, so that the insulation aging acceleration and even motor burnout caused by too high temperature of the stator core and the winding are avoided, and an outer rotor permanent magnet synchronous hub motor works in a safe and efficient range. The stator core segmented structure can also significantly reduce the eddy current loss of the stator core and reduce the heat generation.

Description

technical field [0001] The invention relates to the technical field of hub motors, in particular to a water-cooling structure for an axially segmented inner stator of an outer rotor hub motor. Background technique [0002] Due to energy shortage and environmental pollution, energy-saving and environmentally friendly new energy vehicles have become the development trend of the automotive industry. Due to the combination of in-wheel motors and power electronic devices, it has many advantages such as high integration, high transmission efficiency, simplified chassis structure, flexible layout, four-wheel independent control, and space saving in the car. However, since the in-wheel motor drive system integrates the in-wheel motor, deceleration mechanism, and brake in the wheel, the air circulation in the narrow space of the wheel is not smooth and heat dissipation is difficult. At the same time, the internal space of the hub motor is small, the loss density is relatively high, ...

AI Technical Summary

Problems solved by technology

However, because the hub motor drive system integrates the hub motor, deceleration mechanism, and brake in the wheel, the air circulation in the small space of the wheel is not smooth, and heat dissipation is difficult.

At the same time, the internal space of the hub motor is small, the loss density is relatively high, and the sealing performance is high. It is difficult to discharge the internal heat during the operation of the motor, which will cause the temperature of the stator core and winding to rise, the motor will overheat, and even burn the motor, seriously affecting the performance of the motor. Safe and stable operation, so designing an efficient hub motor cooling structure is of great significance to prolong the service life of the hub motor and improve the performance of the vehicle

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