This paper presents a multiphysics modeling of switched reluctance motor (SRM) to simulate the acoustic radiation electrical machine. The proposed method uses 2-D finite-element model its magnetic properties and mechatronic controls operating conditions. Magnetic forces on stator are calculated using analysis used as excitation forced response that contains structure. Finally, sound power levels boundary element method. Simulation results shown compared with experimental measurements for...

Starting from the well known analytical formula for eddy current losses in electrical steel laminations, saturation and edge effects are studied by means of 1D 2D finite element models a single lamination. A novel method directly including laminated core energy dissipation time stepped model complete (rotating) machine is proposed. By way example applied to tooth with enforced flux waveforms.

The authors present a novel nonlinear homogenization technique for laminated iron cores in three-dimensional (3-D) finite-element (FE) models of electromagnetic devices. takes into account the eddy current effects stacked core without need modeling all laminations separately. A constitutive magnetic law is considered. system algebraic equations obtained after time discretization solved by means Newton-Raphson scheme. By way validation, method applied to 3-D FE model ring with toroidal coil

This paper deals with an analytical model to evaluate the noncharacteristic harmonics that are generated by three-phase three-wire voltage-source converters (VSCs) operating under unbalanced sinusoidal voltage conditions. permits calculation of oscillating current on VSC dc side considering voltages its ac side. It can be used prove use control techniques eliminate dc-side double frequency ripple necessarily creates currents undesirable low-frequency harmonic components In this paper,...

This article proposes a new control algorithm that improves the dynamic performance in distributed maximum power point tracking systems. Systems with these architectures allow to increase photovoltaic harvested case of partial shading and irradiance mismatch. The classical approach adopts DC/DC electronics without any centralized action, which makes difficult know whether system is working on its optimal operating or not. presented this paper exploits benefits vectorial multi-variable...

This paper develops a single-layer equivalent model for multilayered shielding materials using measurements of complex permittivity and permeability. Through rectangular waveguide Transmission/Reflection measurements, electromagnetic parameters effectiveness (SE) are evaluated. The aim is to establish an structure matching the SE original structure. Initial validation involves testing on simulated experimental data reference material. methodology then applied novel three-layer...

A general approach for the frequency-domain homogenization of multiturn windings in two-dimensional (2-D) finite element (FE) calculations is presented. First, a skin and proximity effect characterization individual conductors, arbitrary cross-section packing, obtained using representative 2-D FE model. Herein, three excitation modes are considered, viz current flux density two perpendicular directions. In practical cases, independent frequency-dependent impedance complex reluctivity tensor...

A method is developed to take the eddy currents in lamination stacks into account with finite-element using three-dimensional (3-D) magnetic vector potential magnetodynamic formulation. It consists converting stacked laminations continuums which terms are associated for considering eddy-current loops produced by both parallel and perpendicular fluxes. Two levels of accuracy proposed. The best one based on an accurate analytical expression makes adapted a wide-frequency range, i.e., even low...

The authors present a novel time-domain homogenization technique for laminated iron cores in three-dimensional (3-D) FE models of electromagnetic devices when using the magnetic vector potential formulation. method is based on polynomial orthogonal decomposition variation induction throughout thickness laminations. nonconstant components, due to skin effect, produce additional degrees freedom and equations homogenized core. Insulating layers finite width between laminations (fill factor <1)...

The simulation of rotating electrical machines with skewed slots by means a multi-slice FE model is studied. Particular attention devoted to the ensuing skew discretization error. As an alternative commonly adopted uniform distribution cross-sections along shaft, Gauss proposed. application squirrel-cage induction motor under various working conditions shows that latter produces considerably smaller calculation results are also compared experimental data.

In this paper, a novel and easy-to-implement approach to the harmonic-balance finite-element modeling of electromagnetic devices is presented. The governing system nonlinear algebraic equations derived assuming an arbitrary (anisotropic) magnetic constitutive law. It solved by means Newton-Raphson (NR) method, elaboration which very simple thanks introduction differential reluctivity tensor. method validated applying it three-dimensional two-dimensional voltage-driven model three-phase...

This paper deals with control strategies and reconfiguration needed to maintain PMSM drives in operation after a fault leading single-phase open circuit has occurred. The considered drive is composed of three-phase star-connected machine four-leg voltage-source inverter, the fourth leg being permanently connected neutral point machine. We investigate different current voltage methods: hysteresis abcn natural reference frame dq0 synchronous PI frame. methods are compared considering as...

This study proposes a three-phase photovoltaic (PV) inverter, with active power filtering capability that allows for maximum point tracking (MPPT) and nearly unitary factor (PF) in the connection to low voltage grid. A single-stage current source an inductive DC link, connects PV array grid reduced cost improved performances, MPPT algorithm controls directly of array. On basis balance whole system, references are generated grid-synchronised dq frame allowing mitigation low-frequency...

This paper deals with the optimization for performance and cost of low-power permanent magnet synchronous machines used in automotive applications focus on particularities high-volume mass production constraints that arise. The described loop is to compare different 12/8 12/10 designs interior (IPM) type. After showing IPM exhibits best performance-cost ratio, results obtained at stages process (i.e., sensitivity analysis constrained single-/multiobjective optimizations), both no-load load...

This paper deals with the incorporation of a vector hysteresis model in 2D finite‐element (FE) magnetic field calculations. A previously proposed extension well‐known scalar Jiles‐Atherton is considered. The vectorised shown to have same advantages as one: limited number parameters (which value both models) and ease implementation. classical potential FE formulation adopted. Particular attention paid resolution nonlinear equations by means Newton‐Raphson method. It that application latter...

In this paper the authors present a comparison between optimised versions of three torque sharing functions, with different number degrees freedom, used for improving efficiency in Switched Reluctance Motors. Starting from basic rectangular variation, ascending and descending flanks function are modeled using cosine, exponential more general approach (further referred to as piecewise cubic function). The freedom varying two an arbitrary (for approach) determined so minimize losses, when...

A challenge during the design process of an electrical machine is characterization various parameters in a computational time as short possible. Frequently it required computation that are necessary for tuning drive control algorithm. This paper deals with strategy to compute high-frequency signal injection response sensorless controlled machine. It allows determine self-sensing capability directly process. Such can be defined any given operating point, example, along maximum-torque-per-amps...

This paper presents a dq0 flux-linkage based electrical model for permanent-magnet synchronous machines. To obtain the relationship between flux-linkages and currents, series of magnetostatic finite-element calculations various currents at different rotor positions is carried out. dataset has then to be inverted avoid having derive in Simulink, thus improving numerical stability model. The was validated using 12/10 delta- star-connected fractional-slot concentrated-winding permanent magnet...

In this paper, the authors propose an original time-domain extension of frequency-domain homogenization multiturn windings in finite element (FE) models. For winding type hand (e.g., round conductor with hexagonal packing), elementary FE model is used for determining dimensionless frequency and coefficients regarding skin proximity effect. These are readily utilized homogenizing complete device. The method successfully applied to axisymmetric 103-turn inductor. results agree very well those...

This paper deals with an on-line fault detection method for multi-phase PMSM drives. The is based on the of stator current positive- and negative sequence fundamental components expressed in stationary αβ reference frame. These allow calculating a index used faults, such as open-circuit faults. decision criterion CUSUM algorithm. A model five-phase machine one single-phase derived validated experimental results. Then, it shown that proposed achieves wide speed range even during transient.

This paper deals with the time-domain homogenization of multiturn windings in 3-D finite element (FE) models. An elementary two- dimensional (2-D) FE model allows for global eddy-current characterization winding by means dimensionless frequency and coefficients regarding skin proximity effects. These are used complete device. The method is validated considering an axisymmetric 120-turn inductor which a brute-force 2-D (each turn finely discretized) provides accurate reference solution.

This study deals with an on‐line method for turn‐to‐turn short‐circuit fault detection in low‐voltage permanent‐magnet synchronous machine drives. Owing to the closed‐loop control, effects are reflected voltage. Therefore appropriate diagnostic index is proposed, which derived from positive‐ and negative‐sequences of voltage references. These sequences obtained time domain via adaptive filters, require only a few calculations. To increase sensitivity fault, algorithm applied part references,...