Motor and stator for electric automobile

Abstract

The present invention provides a motor stator, comprising: a stator body; a stator shell, which surrounds and sleeves the stator body along the outer contour of the stator body; a first end cover and a second end cover, which are respectively located on the stator body The ends on both sides of the casing in the axial direction; the cooling channels for the stator are distributed in the stator casing, the first end cover and the second end cover; the fasteners are used to fasten the stator casing and the two end covers to A sealing structure for the cooling channel is formed. The present invention designs a brand-new stator structure with a cooling flow channel, so that the extrusion process with a relatively simple manufacturing process can be applied, thereby increasing the yield and reducing the manufacturing cost.

Description

technical field [0001] The invention relates to the technical field of electric vehicle motor manufacturing, in particular to an electric vehicle motor and a stator thereof. Background technique [0002] With the rapid development of the automobile industry, a series of problems such as shortage of oil resources, environmental warming and climate warming have emerged. New energy vehicles represented by pure electric vehicles will surely become one of the important directions for the development of my country's automobile industry. As the only power source of pure electric vehicles, the performance of automobile electric drive system directly affects the power, stability and comfort of the vehicle. [0003] At the beginning, DC motors were developed as traction motors for electric vehicles, because DC motors have the advantages of large traction force during starting acceleration and relatively simple control system. However, the disadvantage of DC motors is that there is a...

AI Technical Summary

Problems solved by technology

However, (1) the problems existing in the sand casting process are: porosity is easily generated during the casting process, causing leakage of the cooling flow channel; moreover, in different product series, stators with different lengths need to be re-opened, resulting in excessive motor manufacturing costs High; in addition, the stator parts cast by sand casting process have low strength and are easy to wear

(2) The problems in the assembly process of the machined inner and outer shells are: the inner and outer shells have high requirements for dimensional accuracy and the assembly process is complicated

(3) The problems existing in the die-casting process are: limited by the design of the die-casting mold, the cross-section of the cooling channel will become larger, and compared with the preset cooling effect, the actual cooling effect will be worse; in different product series, for stators of different lengths Both need to re-open the mold, resulting in high cost; in addition, the stator parts cast by the sand casting process have low strength and are easy to wear

[0010] Therefore, sand casting, die casting or inner shell processing and assembly manufacturing process: on the one hand, the process itself is not conducive to the production of small motors, on the other hand, there are high scrap rates, poor reliability, and difficult machining and assembly, which makes the motor manufacturing cost high. no less

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