Design and analysis of linear oscillating motor for linear pump application-magnetic field, dynamics and thermotics

Abstract

A linear oscillating motor is an electromagnetic actuator that can achieve short-stroke reciprocating movement directly without auxiliary transmission mechanisms. It has been widely used in linear pump applications as the source of power and motion. However, because of the demand of high power density in a linear actuation system, the performance of linear oscillating motors has been the focus of studies and deserves further research for high power density. In this paper, a general framework of linear oscillating motor design and optimization is addressed in detail, including the electromagnetic, dynamics, and thermal aspects. First, the electromagnetic and dynamics characteristics are modeled to reveal the principle for optimization. Then, optimization and analysis on magnetic structure, resonant system, and thermal features are conducted, which provide the foundation for prototype development. Finally, experimental results are provided for validation. As a whole, this process offers complete guidance for high power density linear oscillating motors in linear pump applications.

Keywords

linear oscillating motor / linear pump / magnetic field / motor optimization

References

[1] Mendrela E A. Comparison of the performance of a linear reluctance oscillating motor operating under AC supply with one under DC supply. IEEE Transactions on Energy Conversion, 1999, 14(3): 328–332

[2] Liang H, Jiao Z, Yan L, . Design and analysis of a tubular linear oscillating motor for directly-driven EHA pump. Sensors and Actuators A: Physical, 2014, 210: 107–118

[3] Lee H K, Song G Y, Park J S, . Development of the linear compressor for a household refrigerator. In: Proceedings of International Compressor Engineering Conference. West Lafayette, 2000, 31–38

[4] Urmoniene L, Gecys S, Guseinoviene E, . Investigation of energetic parameters of oscillating synchronous pulsating current motors. Elektronika ir Elektrotechnika, 2011, 110(4): 17–20

[5] Tomczuk B, Sobol M. A field-network model of a linear oscillating motor and its dynamics characteristics. IEEE Transactions on Magnetics, 2005, 41(8): 2362–2367

[6] Bradshaw T W, Delderfield J, Werrett S T, . Performance of the Oxford Miniature Stirling Cycle Refrigerator. New York: Springer, 1986, 801–809

[7] Huang B J, Chen Y C. System dynamics and control of a linear compressor for stroke and frequency adjustment. Journal of Dynamic Systems, Measurement, and Control, 2002, 124(1): 176–182

[8] Yan L, Zhang L, Wang T, . Magnetic field of tubular linear machines with dual Halbach array. Progress in Electromagnetics Research, 2013, 136: 283–299

[9] Clark R E, Smith D S, Mellor P H, . Design optimization of moving-magnet actuators for reciprocating electro-mechanical systems. IEEE Transactions on Magnetics, 1995, 31(6): 3746–3748

[10] Pompermaier C, Kalluf K, Zambonetti A, . Small linear PM oscillatory motor: magnetic circuit modeling corrected by axisymmetric 2-D FEM and experimental characterization. IEEE Transactions on Industrial Electronics, 2012, 59(3): 1389–1396

[11] Al-Otaibi Z S, Jack A G. On the design of oscillating linear single phase permanent magnet motors. In: Proceedings of the 41st International Universities Power Engineering Conference. 2006, 2: 705–708

[12] Wang J, Howe D. Analysis of axially magnetized, iron-cored, tubular permanent magnet machines. IEE Proceedings—Electric Power Applications, 2004, 151(2): 144–150

[13] Ummaneni R B, Nilssen R, Brennvall J E. Force analysis in design of high power linear permanent magnet actuator with gas springs in drilling applications. In: Proceedings of IEEE International Electric Machines & Drives Conference. 2007, 285–288

[14] Yan L, Peng J, Jiao Z, . Flux field and thrust analysis of permanent-magnet linear machines with isolated movers. IEEE Transactions on Magnetics, 2015, 51(8): 8203208

[15] Wang J, Howe D, Lin Z. Design optimization of short-stroke single-phase tubular permanent-magnet motor for refrigeration applications. IEEE Transactions on Industrial Electronics, 2010, 57(1): 327–334

[16] Zhu Z Q, Chen X. Analysis of an E-core interior permanent magnet linear oscillating actuator. IEEE Transactions on Magnetics, 2008, 44(11): 4361–4364

[17] Lu Q, Yu M, Ye Y, . Thrust force of novel PM transverse flux linear oscillating actuators with moving magnet. IEEE Transactions on Magnetics, 2011, 47(10): 4211–4214

[18] Thangavel G, Chatterjee D, Ganguli A K. FEA simulation models based development and control of an axial flux PMLOM. Journal of Modeling and Simulation of Systems, 2010, 1(1): 74–80

[19] Wang J, Jewell G W, Howe D. A general framework for the analysis and design of tubular linear permanent magnet machine. IEEE Transactions on Magnetics, 1999, 35(3): 1986–2000

[20] Chen X, Zhu Z Q, Howe D. Modeling and analysis of a tubular oscillating permanent-magnet actuator. IEEE Transactions on Industrial Electronics, 2009, 45(6): 1961–1970

[21] Lin Z, Wang J, Howe D. A resonant frequency tracking technique for linear vapor compressors. In: Proceedings of IEEE International Electric Machines & Drives Conference, 2007, 370–375

[22] He P, Jiao Z, Yan L, . Thermal optimization of tubular linear oscillating motor for directly driven LEHA application. Numer Heat Transf A-Appl, 2016, 69(4): 383–400

[23] Wang T, Yan L, Jiao Z, . Analytical modeling of linear oscillating motor with a mixed method considering saturation effect. Sensors and Actuators. A, Physical, 2015, 234: 375–383

[24] Wang T, Yan L, Jiao Z. Design of novel integrated position sensor based on Hall effects for linear oscillating actuator. Review of Scientific Instruments, 2015, 86(7): 075001

Acknowledgments

The authors acknowledge the financial support from the National Key Basic Research Program of China (Grant No. 2014CB046406), the National Natural Science Foundation of China (NSFC) (Grant Nos. 51235002 and 51575026), Fundamental Research Funds for the Central Universities, Science and Technology on Aircraft Control Laboratory, and Fundamental Research on National Defense Program of China (Grant No. A0420132306).

RIGHTS & PERMISSIONS

2016 Higher Education Press and Springer-Verlag Berlin Heidelberg