Development of high efficient fluid power systems with electro-hydarulic pump driven by servomotor

2015 Fiscal Year Final Research Report

• Project/Area Number: 25420083
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Design engineering/Machine functional elements/Tribology
• Research Institution: Yokohama National University
• Principal Investigator: Sato Yasukazu 横浜国立大学, 工学(系)研究科(研究院), 教授 (30262405)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: メカトロニクス / フルードパワーシステム / 電磁アクチュエータ / 油圧工学 / 省動力

Outline of Final Research Achievements

A switched reluctance motor (SRM) outputs the reluctance torque without the power of permanent magnet. A SRM is generally inferior to a permanent magnet synchronous motor in the point of controllability, torque ripple, and noise. Therefore, industrial applications of SRM as servomotor are limited in some special cases. On contrary, a SRM has advantages of the use in high temperature environment with its robust structure. In recent power-saving hydraulic system, valveless power transmission, in which the flow rate is controlled by a hydraulic pump driven by a permanent magnet synchronous servo motor, has been conducted. In addition, a SRM has recently attracted attention as rare-earth-free motor. In this study, the controllability of SRM has been improved compared to previously developed SRM servo system. Furthermore, hydraulic power control using a hydraulic pump driven by the SRM servomotor has been carried out.

Free Research Field

機械工学