高動力密度形電動油圧源の研究

概要

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In stationary hydraulic systems, a hydraulic pump is usually driven by an induction motor. The electric current density in windings of a motor is limited to a small value because of the heat generated. The aim of this study is to augment the output power density of an electromotor-driven hydraulic power source by cooling the inside of an induction motor by hydraulic oil and by operating at higher torque than the rated torque and at high speed using an inverter. In this study, an induction motor, whose specification of windings is altered for high-speed use, is manufactured. The maximum hydraulic output power reached in the experiment when driven by the manufactured, oil-cooled motor is about seven times as large as that reached at the rated operating condition of a conventional, air-cooled motor with the same size as the manufactured motor. The effect of oil-cooling restricts the temperature rise of windings to 10℃ even at the maximum output power.
一般社団法人日本機械学会の論文
1991-12-25