Design And Simulation Of Electromagnetic Energy Regenerative Shock Absorber

With the rapid development of the world's population and economy, the energy has become increasingly scarce and energy-saving technologies become one of the important means to solve this problem. Automobile industry has been developing and at the same time consuming more energy. While the vibration energy caused by car moving can be recycled in order to reduce vehicle energy consumption and improve energy efficiency. This article is based on the idea of vibration energy recovery to design an electromagnetic energy regenerative shock absorber.This paper describes the feasibility of vehicle vibration energy recovery, sums up the domestic and international research on the energy regenerative suspension, and proposes a linear motor type design using rare earth permanent magnet, then conducts a detailed design and simulation. The main work includes the following:First, make a preliminary structural design and material selection for the new shock absorber using the standard of traditional hydraulic shock absorber as a reference, and draw its assembly drawing.Second, make a modeling of the electromagnetic shock absorber using the Maxwell software. Then simulate it in the static magnetic field and analysis the deficiencies of the original design. After making improvements, simulate it in the transient field to get the induced voltage in the coils under different motion conditions and estimate the maximum power that can be fed with equivalent load.Third, the establishment of vibration system model of vehicle suspension is made to analyze the optimal damping based on the comfort and safety. It is found that the damping of the electromagnetic shock absorber is in the reasonable range after calculate its damping ratio under certain suspension parameters.Finally, a series of electric energy recovery circuits are designed from the coil output to battery storage in order to effectively recover the alternating current that generates in vehicle vibrations.