Motor

Abstract

The invention provides a motor. The motor comprises a casing, a rear end cover, a front end cover, a stator and at least one group of oil injection oil pipes, wherein the rear end cover and the frontend cover are respectively arranged on the rear end surface and the front end surface of the casing, the rear end cover is provided with an oil inlet pipe and a rear end cover oil way communicated with the oil inlet pipe, and the front end cover is provided with a front end cover oil way; the rear end cover oil way is communicated with the front end cover oil way through a connecting oil pipe; thestator is arranged in the shell; one of the two oil injection pipes in at least one set of oil injection pipes is installed on the rear end cover and communicated with the rear end cover through an oil way, the other oil injection pipe is installed on the front end cover and communicated with the front end cover through an oil way, and each oil injection pipe is provided with an oil injection hole penetrating through the peripheral wall of the oil injection pipe; the oil injection holes are at least used for cooling a stator core and a winding end part of the stator. According to the motor, through the stator cooling oil way and the rotor cooling oil way, cooling of the motor can be effectively achieved, the cooling effect of the motor is good, and working reliability is high.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to a motor. Background technique [0002] With the increase in the power density of new energy vehicle motors, the requirements for heat dissipation of motors are also getting higher and higher. In the existing new energy vehicle motors, the main cooling methods used are water cooling and oil cooling. [0003] Water cooling is mainly to use cooling water to dissipate heat inside the motor by forming water channels inside the casing, but since the heat generated by the rotor core of the motor is large no matter whether it is a centralized winding or a distributed winding, the cooling effect of the water cooling method is relatively large. Poor, sometimes even cause the temperature rise of the magnetic steel is too high and bring the risk of magnetic steel demagnetization. [0004] Oil cooling is mainly through the design of oil passages inside the casing or the end covers on both si...

AI Technical Summary

Problems solved by technology

[0003] Water cooling is mainly to use cooling water to dissipate heat inside the motor by forming water channels inside the casing, but since the rotor core of the motor generates a large amount of heat regardless of whether it is a centralized winding or a distributed winding, the cooling effect of the water cooling method is relatively large. Poor, sometimes even cause the temperature rise of the magnetic steel to be too high and bring the risk of demagnetization of the magnetic steel

[0004] Oil cooling is mainly through the design of oil passages inside the casing or the end covers on both sides, and adding a drainage structure above the windings to cool the motor stator. However, the existing oil-cooled motors have complex structures and occupy a large space. Conflicting requirements for small size of automotive motors

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