Abstract A m ethod for im proving the constant speed characteristics of V VVF hydraulic elevator is discussed．W ith the load pressure feedback，the internal leakage of pump that had relation to the load pressure was com pensated．Thus the speed control performance was independent of load pressure． The results of the simulation and experiments show that the constant speed performance of this speed control system has been improved．
CHEN Juan, XU Bing, YANG Hua-Yong. VVVF controlled system of hydraulic elevators with load pressure compensation. Chinese Journal of Engineering Design, 2002, 9(2): 89-93.
