Inner-groove oil cooling structure of flat wire motor

Abstract

The invention discloses an inner-groove oil cooling structure of a flat wire motor. According to the structure, stator windings can be directly cooled by introducing oil into an inner-groove cooling oil passage; the inner-groove cooling oil passage is formed by gaps among flat wires, gaps between the flat wires and an isolation sleeve and gaps between the flat wires and the inner walls of stator grooves; a bayonet structure is arranged on a motor stator to separate stator inner-groove windings to form a flow passage among the flat wires; and the flow passage is regular in shape and low in resistance loss. The structure has the advantages that the heat dissipation effect is good and is superior to the direct oil cooling effect of a round wire winding or the existing end heat conductive gluescheme of the flat wire motor; the rated torque and the rated power of the flat wire motor can be increased by a large margin; the peak torque, the peak power and the hold time are increased; and therefore, the power density, the torque density and the overall performance of the motor are increased.

Description

technical field [0001] The invention belongs to the field of motors and electric transmissions, and relates to an oil cooling structure of a motor, in particular to a direct oil cooling stator structure of a flat wire motor. Background technique [0002] As is well known, an electric motor or generator mounted on an automobile includes a rotor and a stator having stator windings. Among them, the motor drives the rotor to rotate by generating current in the stator winding, and the generator generates electricity through the current flowing through the stator winding generated by the rotation of the rotor. When the current generates current in the stator winding, the stator winding will generate heat. [0003] At present, with the development of new energy vehicles and other industries, the demand for motor performance is getting higher and higher, which is reflected in the increasingly stringent size requirements of the motor, while the power and torque requirements are incre...

AI Technical Summary

Problems solved by technology

However, the direct oil cooling in the groove of the flat wire motor in the prior art is mostly cured by the conductive glue at the end and heat transfer through the heat conductive glue, and there is still room for further improving the heat dissipation capacity.

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