Search

Linear permanent magnet Vernier machines (LPMVMs) is an attractive solution for stroke and direct-drive applications. Several LPMVM topologies have been presented for different applications that operate based on magnetic flux modulation. LPMVMs have some advantages including high force, and torque density at low speeds. This paper introduces a double-excited linear Vernier machine for wave energy conversion. To model the machine, finite element analysis and nonlinear equivalent network model are used. To improve the accuracy of the model and compact the network, a new meshing method is proposed. For better continuity in the output waveforms of the machine, special positioning is utilized. The end-effect is modeled using two separate networks. Finally, the modeling and simulation results are compared with each other and validated experimentally. [ABSTRACT FROM AUTHOR]

In this paper, the performance of Variable Reluctance Linear Resolver (VR-L-Resolver) with overlapping and non-overlapping windings is investigated by a novel parametric Magnetic Equivalent Circuit (MEC). The proposed MEC is capable of modeling various VR-L-Resolvers with arbitrary geometry and adjustable accuracy by changing the number of considered flux tubes. This technique is more suitable for modeling, analysis, and optimizing of the mentioned resolvers thanks to its flexibility and shorter processing time compared to the Finite Element Method (FEM). Moreover, it has the potential to model both healthy and faulty conditions by a unique model. Therefore, the resolver with two windings configurations under healthy and faulty cases are analyzed in this paper to study their performance. In faulty case, the inter-turn and asymmetrical air-gap faults are considered, and the position error is calculated for both cases. Finally, the MEC results are validated by 2D-FEM and experimental results to show the effectiveness of the proposed model. In general, applying a novel MEC-based modeling technique for the resolver sensitivity analysis, under mentioned faults and various windings configurations, is the main paper novelty. [ABSTRACT FROM AUTHOR]

This paper presents a new structure of Permanent Magnet Flux-Switching Linear Motor (PM-FSLM) with a simple low weight modular primary and acceptable thrust ripple production. A flexible Magnetic Equivalent Circuit (MEC) is applied for modeling the proposed machine, which is capable to analyze the performance of different structures of PM-FSLMs. The saturation and end-effect phenomena are considered by a nonlinear permeability function and virtual zones at both ends of the machine, respectively. The machine operation under dynamic load is also investigated and its specifications are obtained. The proposed PM-FSLM has more power capability, lower current un-symmetry, and simpler mover structure compared to other ones, which can be mentioned as its benefits. Finally, the results of the proposed method are validated by the Finite Element Method (FEM) to show the effectiveness of the proposed MEC technique in terms of accuracy and processing time. The introduced linear machine and the proposed analysis method with adjustable accuracy are the paper novelties, which are presented in this work for the first time. [ABSTRACT FROM AUTHOR]

An accurate estimation of flux linkage characteristics is very important during the preliminary design stage and high-performance control of linear switched reluctance motor (LSRM). In this paper, longitudinal and transversal end-effects of a double-side LSRM are studied using analytical method and finite element analysis (FEA). The estimation discrepancy introduced by both end-effects is presented respectively by investigating their sensitivities to machine parameters, such as excitation level, translator position, and stack length. [ABSTRACT FROM AUTHOR]