Abstract:A self-contained pump-driven cylinder drive system based on two electric motor and pump (TEMPO) units used for actuation of a two-link, medium-sized knuckle boom crane, is investigated. The TEMPO drive system is equipped with load holding valves and is a closed hydraulic system with a gasless self-pressurizing reservoir. Besides accommodating prescribed safety requirements, the load holding valves allow to reduce energy consumption during standstill. The transition between load holding and motion modes should … Show more
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