External rotor motor and electric vehicle

Abstract

The invention provides an external rotor motor and an electric vehicle. The external rotor motor comprises an external rotor module, a stator module, a motor shaft and a Hall module, wherein the external rotor module and the stator module are assembled on the motor shaft; the stator module is positioned in an accommodating cavity for a wheel hub of the external rotor module; and the Hall module is arranged on the motor shaft, and is positioned in a magnetic ring on an end cover of the external rotor module for detecting a magnetic field of the magnetic ring. In the technical scheme, by using the installation manner that the Hall module is separated from the stator module, the Hall module can be maintained without taking the stator module out from the interior of the external rotor motor, so that the maintenance difficulty of the Hall module is reduced, and the maintenance efficiency of the external rotor motor is improved; and moreover, the condition that the temperature of the stator module in the working process is too high to burn out the Hall module is effectively avoided, so that the service life of the Hall module is prolonged.

Description

technical field [0001] The invention relates to the technical field of motors, in particular to an outer rotor motor and an electric vehicle including the outer rotor motor. Background technique [0002] At present, the external rotor motors used in the market mainly use Hall elements to detect the rotor position. Among them, the Hall elements of the existing external rotor motors are installed in the teeth or slots of the stator assembly inside the motor. When the Hall element is damaged and a fault occurs, the motor end cover must be opened, the stator assembly must be taken out, and then the Hall element on the stator assembly must be repaired. The maintenance process is cumbersome, which brings inconvenience to the maintenance work and reduces the maintenance efficiency. At the same time, due to frequent disassembly, problems such as friction between the outer rotor assembly and the stator assembly, water leakage of the motor, and inability to guarantee concentricity may...

AI Technical Summary

Problems solved by technology

[0002] At present, the external rotor motors used in the market mainly use Hall elements to detect the rotor position. Among them, the Hall elements of the existing external rotor motors are installed in the teeth or slots of the stator assembly inside the motor. When the Hall element is damaged and a fault occurs, the motor end cover must be opened, the stator assembly must be taken out, and then the Hall element on the stator assembly must be repaired. The maintenance process is cumbersome, which brings inconvenience to the maintenance work and reduces the maintenance efficiency. At the same time, due to frequent disassembly, problems such as friction between the outer rotor assembly and the stator assembly, water leakage of the motor, and inability to guarantee concentricity may occur

In addition, if the Hall element is directly installed on the stator assembly, the temperature rise of the stator assembly will cause damage to the Hall element

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