Research On Management Strategy Of Dual Energy Source Of Electric Loader Based On Brake Energy Recovery

Energy saving and emission reduction is an inevitable trend in the development of the world,and the energy saving and emission reduction technology of loaders has always been the focus of research in the field of construction machinery.According to statistics,China sells an average of 123000 loaders every year.If the braking energy cannot be effectively recovered,it will cause a great waste of energy.Therefore,this paper takes ZL30 G loader as the research object,studies the recovery of braking energy of pure electric loader,on the premise of ensuring the braking safety of pure electric loader,the maximum recovery of braking energy.In this paper,the regenerative braking condition of pure electric loader is analyzed,and combined with the characteristics of composite energy system,the topological structure of super capacitor main control type is selected,and super capacitor and battery are used as energy storage elements to recover the braking energy.The fuzzy control and logic threshold control methods are studied for the energy management and braking force distribution strategies of pure electric loader,respectively Atlab / Simulink is used for simulation modeling analysis.The simulation results show that the four control strategies can recover the braking energy under the condition of ensuring the braking safety.The battery state of charge,current and capacity decline of the four control strategies are almost the same.By comparing the state of charge of super capacitor,it is concluded that the braking force distribution based on fuzzy control and the energy management strategy based on logic threshold have the best braking energy recovery effect.The research has reference value for the loader in braking energy recovery.