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This paper deals with an analysis of the design parameters and its influence on performance of the linear induction motor (LIM). LIM propels using Lorentz force generated by interaction between magnetic flux of the primary and eddy current induced in secondary. As depending on the size of the primary and the secondary, not only magnetic flux and induced eddy current, but also performances of the LIM...
We have been developing LIM-type eddy current rail brakes (LIM-ECBs). In this paper, we introduced our approach to simplify the numerical design for the armatures of LIM-ECBs and show the study of changing the number of poles under fixed external dimensions as a specific example.
A switched reluctance linear tubular motor that is proposed as a simple and cheap drive for a water pumps, which are in need in developing countries, is analyzed in the paper. In order to develop a strong driving force at the reciprocating motion a double coil motor with two springs is proposed. Driving electromagnetic static forces are analyzed for various motor dimensions using FEM. Simulation results...
The behavior of vibrating crystal plates under the action of external forces was studied. The plates were respectively subjected to diametrical compression force and bending force in different configurations: (a) a clamped cantilever, (b) a cantilever with displaced knife edges, and (c) a dual support mounting with displaced knife edge applied midway between. Finite element models were developed using...
The mathematical model of clamping electromagnets for clamping force determination on the basis of field theory means is offered for magnetically operated movers of mobile robots (MR) for moving on inclined or vertical ferromagnetic surfaces. The results of experimental investigations of magnetic induction and clamping force measurements in different spatial positions of clamping magnet relative to...
In transversely isotropic (TI) materials, mechanical properties differ along versus across the axis of symmetry (AoS). The degree of these directional differences has been interrogated by ultrasound-based measures of shear wave velocity (SWV) and ARFI peak displacements (PD) acquired along versus across the AoS. When performed using a conventional linear array transducer, such measurements require...
The thrust and levitation force of the long stator linear synchronous motor (LSLSM) are key points to evaluate the performance of the maglev train. However, it is not easy to be achieved due to the non-linear and dynamic coupling characteristics between thrust and levitation force. In this paper, the finite element analysis model of long stator linear synchronous motor is built for analyzing the thrust...
Linear permanent magnet (LPM) machines are used in various fields. In order to generate high thrust force, the size of LPM machine becomes large. Then, magnetic geared linear motor (MGLM) has been proposed. MGLM realizes a high thrust force and downsizing. This paper proposes a new design of MGLM. In addition, two designs of magnetization direction, axial direction and radial direction, are compared...
A bridge-like piezoelectric energy harvester which can be used for energy harvesting on large force load occasions is proposed in this paper. The harvester consists of two parts: piezoelectric stack and a bridge-like amplification mechanism. Basic working principles of the structure are elaborated in details. Finite element analysis based design is introduced in this paper to achieve higher output...
Stirling power generating system, which has the advantages of multiple energies applicable and high efficiency, is promising for aerospace applications. As the main part of Stirling power generating system, single-phase oscillating permanent-magnet linear machine (PMLM) is investigated in this paper. Firstly, the electromagnetic performances, such as no-load back electromotive force (EMF) and thrust,...
This paper presents a transverse flux linear motor (TFLM) with the superconductor-aluminum hybrid as the secondary and E-shaped ferromagnetic yokes wrapped the conductor windings as the primary to generate the transverse flux, the hybrid secondary is made of aluminum plate and close-ended coated superconductor coils, with the latter placed over the former to realize the stable levitation, guidance...
The active liquid cooling system is urgently required for heat dissipation of high-power electronics. However, the key part of the system, micro-pump, is still challenged by the bearing failure problem caused by the mechanical friction. We designed a hydro-dynamically levitated centrifugal micro-pump, providing a 1.0 L/min flow rate and a 45 KPa pressure head at 20000 rpm with the size as small as...
Through Silicon via (TSV) technology makes the stacked chip to achieve the shortest distance of interconnection in vertical direction (z direction). However, there are many challenges for TSV wafer processes. One of the challenges is TSV wafer backside grinding process. In this paper, a predictive model was introduced to calculate the normal grinding force, and a dynamic finite element modeling methodology...
To solve the low power density disadvantage of direct-drive wave energy converter, caused by low direct-drive speed. A novel linear tubular field modulated permanent magnet generator is proposed, which can effectively improve the performance of this kind of generators. The operation of the proposed generator is analyzed. The generator performance is evaluated using finite element method. The results...
As a kind of green energy, the wave energy exhibits high energy density, abundant global reserves, extensive application and high predictability. To this application, the direct driven linear motors already become strong candidates in recent year due to the motion feature of waves, therefore a kind PM-assisted reluctance synchronous linear generator (PMRSLG) is proposed in this paper. Based on FEA,...
This paper proposes a novel modular linear primary permanent-magnet vernier (LPPMV) machine. With PMs and windings placed on the primary side, this machine possesses a simple secondary side, suitable for long stroke applications such as urban rail transit. Owing to its appropriate primary structure and the Halbach PM arrays, the proposed LPPMV machine offers higher force density, higher back-EMF and...
This paper provides a detailed investigation of the influence mechanism on vibration and noise of permanent magnet synchronous motors with skewed stators. Several skewed stator structures are researched to show the features of the flux and force. The finite element method is used to analyze the motor vibrations, displacements of deformation, and modals considering the mechanism of skewed stator. The...
A manipulator with multiple degrees of freedom such as a hyper-redundant manipulator is generally applied in many applications ranging from medicine to space exploration. Most importantly, the multiple degrees of freedom of the manipulators allow the user to access areas where a rigid body has difficulty accessing. Kinematics analysis of the manipulator is required for the user to control and manage...
A novel parametric model of the stiifened shell is developed by Python language with Abaqus in this paper. As an effective analysis method in the optimal design, explicit finite element method (FEM) is used to design and optimize the skin thickness and stiffener size of Stiffened Shells. The optimization objectives and constraints are mainly the minimum mass subject to the structural performance and...
In this study, rivet optimization is analyzed for a channel section of a fuselage frame. Rivets are captured by using beam elements in ANSYS Workbench. In order to optimize locations of rivets, basic rivet group on frame is analyzed by using given output loads (forces and moment). Based on this analysis, hand calculation was conducted then Workbench optimization option in ANSYS is used to find out...
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