可動磁石方式による高速小型リニアアクチュエータの開発

概要

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The development of EMV (Electromagnetics Engine Valve) has received a great deal of attention from the viewpoint of realizing lower energy consumption and lower exhaust gas emission. The reason is that the EMV enables the intake and exhaust valves to move with arbitrary open/close profiles. This paper presents a high-speed and compact linear actuator using moving-magnet system. In this development, the desired performance is determined by assuming that the linear actuator is used within the limit of the number of engine revolutions of 5000[rpm]. The mechanical structure is designed while repeating the magnetic field analysis from the viewpoint of high energy efficiency. Then, in order to examine the positioning performance, PD feedback control and feedforward control are applied to this system. As a result, the developed linear actuator enables high-speed positioning with the stroke of 7.6[mm] in time of 4[ms] and with the positioning accuracy of 50[μm] which shows that the desired performance is satisfied.
電気製鋼研究会の論文