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This paper aims to describe a numerical modeling process for estimating the electromagnetic noise radiated from a permanent magnet synchronous machines. The original contributions concern the inclusion of a complete evaluation of the electromagnetic forces acting on the stator teeth, a complete 3-D structural finite-element model and a point wise approximation for acoustic calculation. Structural...
This paper presents an analysis of the torque ripple of a six-phase fault tolerant permanent magnet synchronous machine (PMSM6) for electrical power steering system (EPS) applications. Opened stator phase is the realistic fault condition that can be imagined for a machine fed by a power converter drive system. The behavior of the machine was analyzed under three different winding fault conditions...
An axial-axial flux compound-structure permanent-magnet synchronous machine (CS-PMSM), which is a hybrid electric vehicle (HEV) power train concept, is a structural integration of two axial flux permanent-magnet synchronous machines. It is a novel electromagnetic device with dual mechanical ports and dual electric ports. In this paper, several candidate electromagnetic schemes for the CS-PMSM are...
A radial-radial flux compound-structure permanent-magnet synchronous machine (CS-PMSM) is an electromagnetic transmission which is integrated by two concentrically arranged electric machines. As the two electric machines share a rotor as structural and magnetic common part, their magnetic paths are coupled. The magnetic-path coupling may cause the magnetic-field interference of the two machines, which...
Accurate analysis of electrical machinery is of the outmost importance in the design process. Many studies have demonstrated that accurately assessing the behavior of axial flux PM machines is not an easy task, even using FEM analysis. The model proposed in the paper takes into account MMF harmonics, skewing, stator and rotor core losses with traditional and fractional winding layouts. The model is...
The design of modern high power density permanent magnet synchronous machines requires adapted automated design tools. The temperature estimation at characteristic points of the machine, and in particular in permanent magnets, is essential to accurately simulate the electromagnetic behavior and avoid irreversible demagnetization. In this paper, an electromagnetic dimensioning model, parameterized...
A permanent magnets synchronous machine electromagnetic design is presented in this paper. The machine is characterised by a concentrated windings stator and focusing principle ferrite permanent magnets rotor. First, an analytic study is lead to determine the main influent parameters. A finite element analysis is then achieved in order to study more precisely the geometric parameters impact on the...
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