This dissertation focus on a innovation methods for inverter controlled hydraulic elevator system applying pressure accumulator as the " pressure - energy transformer " . the required power supply and running energy can be reduced remarkably when accumulators storing and releasing pressure oil . then the key items about hydraulic speed control system based on the ens 1 - 2 and other hydraulic elevator standards are investigated in detail 本论文主要研究了采用蓄能器-液压泵马达构成的“压力-能量转换装置”来储存释放变频驱动液压电梯系统的能量，从而降低液压电梯装机功率和运行能耗的新方案；在此基础上，根据国内外液压电梯的标准进行了与速度控制相关的关键项目测试，最后针对本课题研制的节能控制系统与当前市场上几种典型的液压电梯控制系统进行了能耗对比研究。
