Abstract
In a traditional 1-level pressure valve-controlled hydraulic servo system, the response is good, but the efficiency is deteriorated. In a load-sensing pump-controlled hydraulic servo system, the efficiency is good, but it is desired that the response be improved. Therefore, an N-level pressure hybrid power supply has been proposed to realize high efficiency and high response simultaneously in the 1st report, and its high efficiency has been verified by experiments of a 2-level pressure valve-controlled hydraulic servo system. In this paper, a separated type N-level pressure hybrid power supply is described in detail. A 2-level pressure valve-controlled hydraulic servo system using separated type power supply is used to conduct the experiments. Power consumption of the system is also measured. It is verified that the efficiency of the system using a separated type power supply is not only higher than the traditional system, but also the response of the system is as good as the traditional system under the frequency of 20Hz.
