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Abstract: The energy-saving principle of VVVF controlled hydraulic
elevators with pressure accumulators is introduced. The calculating
method of installed power of the improved hydraulic elevator is
presented, and so it is clear that the installed power of the system can
be reduced greatly. The experimental power characteristics of the
elevator hydraulic circuits are obtained under different working
conditions. Compared with other typical hydraulic elevator power
systems, this improved system has higher overall efficiency and lower
energy consumption.
Key words: Hydraulic elevators Pressure accumulators Variable
voltage varible frequency Installed power Energy consumption
CLC No: TH137
“十五”国家科技攻关计划(2002BA208B02-3)、浙江省自然科学基金(502088)资助项目.
Received 20030114, received in revised form 20030328
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