Investigation of the effect of eccentricity in Flux Switching Permanent Magnet machines

This paper studies a 10/12 Flux Switching Permanent Magnet (FSPM) machine under static eccentricity fault to assess the performance of the machine under different operating conditions. Two-dimensional finite element method (FEM) is used to model the complicated structure of the machine in order to obtain accurate results. Furthermore, finite element analysis (FEA) is used to obtain air-gap flux density, machine's torque and the force between stator and rotor under different degrees of static eccentricity. Furthermore, Fourier analysis is performed to study magnetic force and torque profiles. To the best awareness of the authors, the effects of the eccentricity of FSPM machines have not been studied previously

Electrical and Thermal Analysis of Single Conductor Power Cable Considering the Lead Sheath Effect Based on Finite Element Method

This paper investigates the effect of metallic sheaths on losses and temperature of medium voltage power cables. Two grounding methods of sheaths, including both ends bonding and single point bonding that causes different situations on cable ampacity, are considered. Electrical losses of cables that are main sources of heat are calculated in both conductor and metallic sheath of the cables. Sheathed and unsheathed medium voltage single conductor cables in flat and trefoil formations with different distances are considered, while calculated losses are compared in different constructions. Calculations of resistive losses are performed based on finite element method (FEM) and IEC standard formulations. The results of two methods are compared and analyzed. Moreover, the effects of eddy currents and circulating currents of sheath on total resistive losses are evaluated. Finally, thermal analysis based on FEM is executed to achieve maximum temperature of cable in different constructions. Simulation results show the importance of metallic sheaths and grounding system effects in power cable ampacity analysis

Inner Permanent Magnet Synchronous Machine Optimization for HEV Traction Drive Application in Order to Achieve Maximum Torque per Ampere

Recently, Inner permanent magnet (IPM) synchronous machines have been introduced as a possible traction motor in hybrid electric vehicle (HEV) and traction applications due to their unique merits. In order to achieve maximum torque per ampere (MTPA), optimization of the motor geometry parameters is necessary. This paper Presents a design method to achieve minimum volume, MTPA and minimum value of cogging torque for traction IPM synchronous machines and simulation in order to extract the output values of motor is done using 3D-Finite Element Model, that has high level of accuracy and gives us a better insight of motor performance. Then presents back EMF, power factor, cogging torque, Flux density, torque per ampere diagram, CPSR (constant power speed ratio), torque per speed diagram in this IPM synchronous machine. This study can help designers in design approach of such motors

Electromagnetic Analysis of Hysteresis Synchronous Motor Based on Complex Permeability Concept

Hysteresis motor is self-starting synchronous motor that uses the hysteresis characteristics of magnetic materials to make torque. There are different methods to model this kind of motor and take into account the magnetic hysteresis characteristic of the rotor hysteresis ring. In this investigation the application of complex permeability concept is implemented to model the hysteresis loop and the hysteresis loop in inclined ellipse shape is adopted. To the best knowledge of the authors, this has not been studied before. Based on this concept, simulation of hysteresis motor in conventional configuration is done in order to obtain the output values of motor using 3D Finite Element Model (FEM). This 3D finite element model has high level accuracy and gives better insight of motor performance. Meanwhile, in order to validate the simulation results an experimental set up is provided and the output values of typical motor are measured. It is shown that there is a good agreement between experimental and simulation results. i, Abolfazl Vahedi, , r, [email protected](Corresponding author),