Abstract
This paper presents a bi-directional permanent-magnet linear actuator for directly driving electrohydraulic valves with low power consumption. Its static and dynamic performances were analyzed using the 2D finite element method, taking into account the nonlinear characterization and the eddy current loss of the magnetic material. The experiment and simulation results agree well and show that the prototype actuator can produce a force of ±100 N with the maximum power being 7 W and has linear characteristics with a positive magnetic stiffness within a stroke of ±1 mm. Its non-linearity is less than 1.5% and the hysteresis less than 1.5%. The actuator’s frequency response (−3 dB) of the displacement reaches about 15 Hz, and the most significant factor affecting the dynamic performance is identified as the eddy current loss of the magnetic material.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Clark, R.E., Jewell, G.W., Howe, D., 2003. Dynamic modeling of tubular moving-magnet linear actuators. Journal of Applied Physics, 93(10):8787–8789. [doi:10.1063/1.1544518]
Dou, Y.P., Guo, Y.G., Zhu, J.G., Lu, H.Y., 2007. Effect of armature reaction of a permanent-magnet claw pole smc motor. IEEE Transactions on Magnetics, 43(6):2561–2563. [doi:10.1109/TMAG.2007.892321]
Evans, S.A., Smith, I.R., Kettleborough, J.G., 2001. Permanent-magnet linear actuator for static and reciprocating short-stroke electromechanical systems. IEEE/ASME Transactions on Mechatronics, 6(1):36–42. [doi:10.1109/3516.914389]
Girbau, D., Llamas, M.A., Casals-Terre, J., Simo-Selvas, X., Pradell, L., Lazaro, A., 2007. A low-power-consumption out-of-plane electrothermal actuator. Journal of Microelectromechanical Systems, 16(3):719–727. [doi:10.1109/JMEMS.2007.896714]
Li, Y., Ding, F., Weng, Z.T., Li, Q.P., 2007. Low Power High Pressure Bi-directional Linear Force Motor. China Patent of Invention, No.CN101013841.
Lu, Y.X., 2005. A Systematic Philosophy Consideration on the Fluid Power Driven and Control Technology. Proceedings of the Sixth International Conference on Fluid Power Transmission and Control ICFP’2005, Hangzhou, China, p.1–5.
MOOG Inc., 1998. D633D634 Series Direct Drive Servo-Proportional Control Valves. Manufacture Catalog, New York, p.2–3.
Woo, K.I., Kwon, B.I., 2004. Characteristic analysis and modification of pm-type magnetic circuit breaker. IEEE Transactions on Magnetics, 40(2):691–694. [doi:10.1109/TMAG.2004.825423]
YUKEN Inc., 2002. E-DSG Series Direct Acting Typing Low Wattage Valves. Manufacture Catalog, Tokyo, Pub.JC-0419.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Li, Y., Ding, F., Cui, J. et al. Low power linear actuator for direct drive electrohydraulic valves. J. Zhejiang Univ. Sci. A 9, 940–943 (2008). https://doi.org/10.1631/jzus.A0820028
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1631/jzus.A0820028