MEC-Based Modeling and Sizing of a Tubular Linear PM Synchronous Machine

Linear machines are currently considered as viable candidates for direct-drive wave and free-piston energy converters. This paper is devoted to an approach based on a magnetic equivalent circuit (MEC), which is also called lumped circuit, dedicated to the modeling and sizing of a tubular linear permanent-magnet synchronous machine (T-LPMSM). The proposed approach considers, in a first step, the cancelation of the end-effect phenomenon. To do so, a dedicated design procedure, consisting in achieving a $2\pi/3$-shift between the armature phase flux linkages by selecting a fractional ratio of the stator pole pitch to the mover one and balancing the amplitudes of the phase flux linkages by extending the stator magnetic circuit with teeth of appropriate dimensions, is firmly applied on two basic T-LPMSM topologies using a dedicated MEC. Then, an investigation of the influent sizing parameters on the force production capability of the initial concept is carried out. The MEC-based prediction of the force requires the incorporation of the mover displacement, yielding the so-called “position varying MEC” on one hand and the armature magnetic reaction on the other hand. The finite-element analysis of the armature phase flux linkages and the developed force enable the validation of the results yielded by the established MECs.

[1]  Koen J Meessen,et al.  Modeling and Experimental Verification of a Tubular Actuator for 20-g Acceleration in a Pick-and-Place Application , 2010, IEEE Transactions on Industry Applications.

[2]  G.-W. Hsieh,et al.  Bond-and-transfer scanning probe array for high-density data storage , 2005, IEEE Transactions on Magnetics.

[3]  Yunkai Huang,et al.  Analytical Magnetic Field Analysis and Prediction of Cogging Force and Torque of a Linear and Rotary Permanent Magnet Actuator , 2011, IEEE Transactions on Magnetics.

[4]  Paolo Mattavelli,et al.  Effect of Control Strategies and Power Take-Off Efficiency on the Power Capture From Sea Waves , 2011, IEEE Transactions on Energy Conversion.

[5]  S. Vaez-Zadeh,et al.  An Improved Magnetic Equivalent Circuit Model for Iron-Core Linear Permanent-Magnet Synchronous Motors , 2010, IEEE Transactions on Magnetics.

[6]  Sebastian Gruber,et al.  Reduction of detent force caused by the end effect of a high thrust tubular PMLSM using a genetic algorithm and FEM , 2010, IECON 2010 - 36th Annual Conference on IEEE Industrial Electronics Society.

[7]  Giampaolo Buticchi,et al.  Design of a High-Force-Density Tubular Motor , 2014, IEEE Transactions on Industry Applications.

[8]  M. J. Hoeijmakers,et al.  Modeling of a linear PM Machine including magnetic saturation and end effects: maximum force-to-current ratio , 2003 .

[9]  Joshua M Williams,et al.  Incorporating Motion in Mesh-Based Magnetic Equivalent Circuits , 2010, IEEE Transactions on Energy Conversion.

[10]  Giuliana Mattiazzo,et al.  Linear Tubular Permanent-Magnet Generators for the Inertial Sea Wave Energy Converter , 2014, IEEE Transactions on Industry Applications.

[11]  Ping Zheng,et al.  Electromagnetic Design and Control Strategy of an Axially Magnetized Permanent-Magnet Linear Alternator for Free-Piston Stirling Engines , 2012, IEEE Transactions on Industry Applications.

[12]  T K A Brekken,et al.  A Permanent-Magnet Tubular Linear Generator for Ocean Wave Energy Conversion , 2010, IEEE Transactions on Industry Applications.

[13]  D. Howe,et al.  Tubular modular permanent-magnet machines equipped with quasi-Halbach magnetized magnets-part I: magnetic field distribution, EMF, and thrust force , 2005, IEEE Transactions on Magnetics.

[14]  X. Chen,et al.  Modeling and Analysis of a Tubular Oscillating Permanent Magnet Actuator , 2008, 2008 IEEE Industry Applications Society Annual Meeting.

[15]  Seok-Myeong Jang,et al.  Equivalent Magnetic Circuit Based Levitation Force Computation of Controlled Permanent Magnet Levitation System , 2012, IEEE Transactions on Magnetics.

[16]  Lars Norum,et al.  Variable voltage variable frequency control of tubular linear permanent magnet synchronous machine for drilling applications , 2010, The XIX International Conference on Electrical Machines - ICEM 2010.

[17]  A. Binder,et al.  Simulation of electrical machines end effects with reduced length 3D FEM models , 2012, 2012 XXth International Conference on Electrical Machines.

[18]  N. Bianchi,et al.  Analytical computation of magnetic fields and thrusts in a tubular PM linear servo motor , 2000, Conference Record of the 2000 IEEE Industry Applications Conference. Thirty-Fifth IAS Annual Meeting and World Conference on Industrial Applications of Electrical Energy (Cat. No.00CH37129).

[19]  Jawad Faiz,et al.  Design and simulation of a 250 kW linear permanent magnet generator for wave energy to electric energy conversion in caspian sea , 2009, 2009 International Conference on Sustainable Power Generation and Supply.

[20]  F. Alonge,et al.  Parameter identification of linear induction motor model in extended range of operation by means of input-output data , 2012, 2012 IEEE Energy Conversion Congress and Exposition (ECCE).

[21]  Gianmario Pellegrino,et al.  End Effects in Linear Tubular Motors and Compensated Position Sensorless Control Based on Pulsating Voltage Injection , 2011, IEEE Transactions on Industrial Electronics.

[22]  Amina Ibala,et al.  Accounting for the Armature Magnetic Reaction and Saturation Effects in the Reluctance Model of a New Concept of Claw-Pole Alternator , 2010, IEEE Transactions on Magnetics.

[23]  H. Bernhoff,et al.  Catch the wave to electricity , 2009, IEEE Power and Energy Magazine.

[24]  P. Zheng,et al.  Research on a Tubular Longitudinal Flux PM Linear Generator Used for Free-Piston Energy Converter , 2007, IEEE Transactions on Magnetics.

[25]  A.J.A. Vandenput,et al.  Analytical and Numerical Techniques for Solving Laplace and Poisson Equations in a Tubular Permanent Magnet Actuator: Part II. Schwarz–Christoffel Mapping , 2008, IEEE Transactions on Magnetics.

[26]  Kais Atallah,et al.  A Linear Permanent-Magnet Motor for Active Vehicle Suspension , 2011, IEEE Transactions on Vehicular Technology.

[27]  Ahmed Masmoudi,et al.  A design approach to reduce the end effect in linear tubular PM machines , 2014, 2014 Ninth International Conference on Ecological Vehicles and Renewable Energies (EVER).

[28]  Frank Rinderknecht,et al.  Design of future concepts and variants of The Free Piston Linear Generator , 2014, 2014 Ninth International Conference on Ecological Vehicles and Renewable Energies (EVER).

[29]  G Pellegrino,et al.  Sensorless Position Control of Permanent-Magnet Motors With Pulsating Current Injection and Compensation of Motor End Effects , 2011, IEEE Transactions on Industry Applications.

[30]  Yongchang Zhang,et al.  Equivalent circuits for single-sided linear induction motors , 2009, 2009 IEEE Energy Conversion Congress and Exposition.