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CLC number: TH137

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Received: 2008-01-11

Revision Accepted: 2008-03-25

Crosschecked: 0000-00-00

Cited: 6

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Citations:  Bibtex RefMan EndNote GB/T7714

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Journal of Zhejiang University SCIENCE A 2008 Vol.9 No.7 P.940~943

http://doi.org/10.1631/jzus.A0820028


Low power linear actuator for direct drive electrohydraulic valves


Author(s):  Yong LI, Fan DING, Jian CUI, Qi-peng LI

Affiliation(s):  State Key Laboratory of Fluid Power Transmission and Control, Zhejiang University, Hangzhou 310027, China; more

Corresponding email(s):   lqp@zju.edu.cn

Key Words:  Electrohydraulic valves, Linear actuator, Low power, High pressure, Positive magnetic stiffness


Yong LI, Fan DING, Jian CUI, Qi-peng LI. Low power linear actuator for direct drive electrohydraulic valves[J]. Journal of Zhejiang University Science A, 2008, 9(7): 940~943.

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author="Yong LI, Fan DING, Jian CUI, Qi-peng LI",
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%I Zhejiang University Press & Springer
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T1 - Low power linear actuator for direct drive electrohydraulic valves
A1 - Yong LI
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A1 - Qi-peng LI
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.A0820028


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.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

Reference

[1] 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.

[2] 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.

[3] 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.

[4] 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.

[5] 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.

[6] 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.

[7] MOOG Inc., 1998. D633D634 Series Direct Drive Servo-Proportional Control Valves. Manufacture Catalog, New York, p.2-3.

[8] 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.

[9] YUKEN Inc., 2002. E-DSG Series Direct Acting Typing Low Wattage Valves. Manufacture Catalog, Tokyo, Pub.JC-0419.

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