Abstract
Compared to passive suspensions, active suspensions with electromagnetic linear actuator (EMLA) not only has higher performance in active force control, but also can regenerate energy form road disturbances. In this study, the characteristics of a new designed EMLA were investigated under generator mode by precisely co-simulating the quarter active suspension with single degree of freedom. This model, which consists of sprung mass, EMLA imported from Maxwell and a spring in parallel with the EMLA, is built in Simplorer. Simulation results show that the mechanical power and electric power of the EMLA are both proportional to the frequency and amplitude of excitation. The efficiency, defined as the ratio of electric energy to mechanical energy, decreases with the increase of frequency while nonlinearly changes with the increase of stroke. The yielded maximal efficiency of 94% occur sat the frequency of 2 Hzand the stroke ranges of6mm to 9mm.
Highlights
The passive suspensions absorb road vibration by converting kinetic energy into heat and dissipating it, but for the electromagnetic active suspensions, the vibration energy can be harvested into electricity and stored in batteries
In order to observe the characteristic of the EMLAconveniently, the road disturbances are assumed as sinusoidal displacement excitation, the mechanical power, electric power, and efficiency η, defined as the ratio of electric energy to mechanical energy are given by the formulas as follows:
It will first be of importance to analyze the power generation characteristics of the electromagnetic linear actuator (EMLA) under different excitations
Summary
The passive suspensions absorb road vibration by converting kinetic energy into heat and dissipating it, but for the electromagnetic active suspensions, the vibration energy can be harvested into electricity and stored in batteries. Electromagnetic active suspensions increasingly become attractive replacements for the currently installed passive suspensions, especially for the electric vehicles in which the high voltage batteries can be used to drive the linear actuator and store the electricity [1,2,3]. As the key component of the electromagnetic active suspensions, electromagnetic linear actuator (EMLA) operates in two modes, namely motor mode and generator mode. Batteries deliver energy to EMLA to achieve desirable active force. Co-simulation between Maxwell and Simplorer is adopted to model the 1/4 electromagnetic active suspension and analyze the power generation characteristic of the EMLA under different excitations
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
