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


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",
journal="Journal of Zhejiang University Science A",
publisher="Zhejiang University Press & Springer",

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%T Low power linear actuator for direct drive electrohydraulic valves
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%A Jian CUI
%A 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
A1 - Fan DING
A1 - Jian CUI
A1 - Qi-peng LI
J0 - Journal of Zhejiang University Science A
VL - 9
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SP - 940
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%@ 1673-565X
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.A0820028

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


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[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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