A self-powered magneto-rheological shock absorber for in-wheel motor driven electric vehicles

Abstract

The invention provides a self-powered magneto-rheological shock absorber for an electric vehicle driven by a hub motor, which belongs to the field of vehicle system vibration reduction. The invention is composed of a rigidly connected magnetorheological shock absorber and a linear electromagnetic dynamic shock absorber. The magnetorheological shock absorber with simple control and low energy consumption is used to suppress the vibration of the vehicle body and improve the ride comfort of an electric vehicle driven by a hub motor; the linear The electromagnetic dynamic shock absorber includes a stator and a mover, and always works in the passive energy feeding mode; the linear electromagnetic dynamic shock absorber is a mass-stiffness-damping resonance system acting on the wheel, without external control, which can effectively reduce the body acceleration in the wheel resonance frequency band, tire The dynamic load and suspension dynamic deflection can suppress the vibration of the wheel and improve the driving safety of the electric vehicle driven by the in-wheel motor. When the stator and the mover move in a relative straight line, the coil winding generates an induced current to provide energy for the magneto-rheological shock absorber to realize the self-energy supply of the shock absorber. At the same time, the remaining energy is stored in the battery to realize energy recovery.

Description

technical field [0001] The invention relates to the technical field of vehicle system vibration reduction, in particular to a self-powered magneto-rheological shock absorber for an electric vehicle driven by a hub motor. Background technique [0002] So far, automobiles have become a necessary means of transportation for people to travel and transport goods. However, traditional internal combustion engine vehicles also bring many problems, such as high energy consumption and large emissions, resulting in energy shortage and environmental degradation. Compared with traditional vehicles, electric vehicles have developed rapidly due to their advantages of low noise, low emissions and high energy utilization. In-wheel motor-driven electric vehicles cancel the complex traditional power system and drive directly at the wheels. It has the advantages of high transmission efficiency, small footprint and simple control. It is an important direction for the development of electric veh...

AI Technical Summary

Problems solved by technology

Although the natural frequency can be changed by using the active electromagnetic dynamic vibration absorber, there are problems of complicated control and high energy consumption

[0005] In summary, due to the negative effect of vertical dynamic performance of in-wheel motor-driven electric vehicles, the ride comfort and driving safety are deteriorated, and the active electromagnetic suspension or active electromagnetic dynamic shock absorber is used, which makes the control complex and consumes a lot of energy.

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