ENERGY CONSUMPTION CHARACTERISTICS OF VVVF CONTROLLED HYDRAULIC ELEVATORS

XU Bing  ZHANG Bin  LIN Jianjie

(State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027)

Abstract: VVVF-applied technique is the main developing direction of hydraulic elevators, and it provides an efficient way to reduce the large energy consumption of hydraulic elevators. The energy saving principle of VVVF controlled hydraulic elevators is studied. The experimental power consumption characteristics of elevator hydraulic circuits are obtained. Compared with the conventional valve controlled hydraulic elevator under the same working conditions, the VVVF controlled one has higher efficiency, lower energy consumption. VVVF technique also has a broad application to other vertically moved mechanism driven by hydraulic power.

Key words: VVVF drive  Hydraulic elevators  Energy consumption

CLC No: TH137

国家“十五”科技攻关计划(2002BA208B02)和国家自然科学基金(50305032)资助项目.Received 20050924,received in revised form 20060428