Electric machine driving device used on light electromobile

Abstract

A motor driver system for electric light vehicle features that its drive unit connected to the hub of wheel is composed of small gear fixed to the output mainshaft of motor, intermediate gear, big gear engaged with small gear via said intermediate gear, and overidding clutch between said big gear and drive shaft of wheels.

Description

technical field [0001] The patent of the present invention relates to a motor drive device for light electric vehicles, which is suitable for light electric vehicles above electric motorcycles (excluding electric bicycles), and belongs to the field of power devices of electromechanical products. Background technique [0002] At present, all domestic electric motorcycle motor drives are directly driven by low-speed motors, such as: low-speed brushless motor drives, low-speed brushed motor drives, and their typical structures are as follows figure 1 Shown, wherein 1 is wheel hub, and the external rotor 2 of motor is fixedly installed in wheel hub 1, and tire 4 rotates together with motor external rotor 2 and wheel hub 1, and 3 is motor stator, and its fixed shaft 5 is fixed on vehicle frame 6. Due to the large number of coils and large internal resistance of this type of low-speed motor, the performance is very poor. The motor efficiency can only reach 70-75%, and the mechanic...

AI Technical Summary

Problems solved by technology

Due to the large number of coils and large internal resistance of this type of low-speed motor, the performance is very poor. The motor efficiency can only reach 70-75%, and the mechanical characteristic β value can only reach 12-15 (rpm / Nm). Limit, can no longer be raised

In actual use, it is characterized by poor climbing ability (small output torque) and short driving mileage (high driving current on flat roads), which has become a technical bottleneck in the development of electric motorcycles.

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