基于工作特征的电动叉车能量联合回收方法研究

Research on the Combined Energy Recovery Method of Electric ForkliftBased on Working Characteristics

针对电动叉车在其工况循环中,门架系统升降和驱动系统起、制动频繁所产生的节流损耗和能量浪费问题,提出一种基于工作特征的能量联合回收方法。在分析叉车典型工作流程基础上,提出以超级电容作为储能装置的电动叉车势能和制动能的联合回收方案,并引入模糊PID自适应控制方法实现电液位置伺服系统对液压缸位移的精准控制;针对提出的方案和控制方法,运用AMESim和Simulink软件建立了电动叉车势能和动能的能量联合回收仿真模型;最后,利用提出的方法和仿真模型对某仓库电动叉车的一个工作循环进行能量回收分析,结果表明所提方法对势能和制动能联合回收的效果显著,提高了电动叉车续航里程和能量使用效率。

Aiming at the throttling loss and energy waste caused by frequent lifting and braking of gantry system and driving system of electric forklift in its working cycle,a combined energy recovery method based on working characteristics was proposed.On the basis of analyzing the typical working process of forklift,a combined recovery scheme of potential energy and braking energy of electric forklift with super capacitor as energy storage device was proposed,and the fuzzy PID adaptive control method was introduced to realize the accurate control of the displacement of hydraulic cylinder by the electro-hydraulic position servo system;aiming at the proposed scheme and control method,the simulation model of potential energy and kinetic energy joint recovery of electric forklift was established by using AMESim and Simulink software.Finally,the proposed method and simulation model were used to analyze the energy recovery of a working cycle of an electric forklift truck in a warehouse.The results show that the proposed method has a significant effect on the combined recovery of potential energy and brake energy,the range and energy efficiency of the electric forklift truck are improved.