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This paper presents an enhanced Permeance Network Model (PNM) for embedded permanent magnet synchronous machines. PNMs are characterized by very fast and accurate results. Furthermore, this approach overcomes some weaknesses associated to analytical models, such as the impossibility of accurately predicting the embedded magnet machines behavior or taking into account the nonlinear behavior of the...
Axial Flux Permanent Magnets (AFPM) machines are a new kind of permanent magnet machines receiving more attention in the two recent decades. Many different structure of this machine was made. Axial flux machine has better "power to weight ratio", "efficiency", "smaller size" and "adjustable air gap" in compare whit radial flux machine. This article tries to...
This paper presents a transient simulation model for permanent magnet synchronous machines (PMSM) under consideration of spatial harmonics produced from the stator winding. In addition, numerical identification methods for determining the necessary equivalent circuit element parameters are given. Simulation results are presented based on a test machine.
Elevated frequencies in high-speed ac machines increase the skin effect in stator windings, making it necessary in many cases to divide each phase winding into high numbers of small-diameter strands connected in parallel. Unfortunately, circulating currents among the strands in a single bundle can significantly increase the total copper losses depending on several factors including the twisting (i...
In order to improve operation performance of underwater vehicle anti-rotation propulsion system, a novel PMSM with Anti-rotation Dual rotor is proposed. It can be substantially simplify system structure, decrease volume and cost, moreover, improve reliability without brush and slip-ring. After the principles of operation, structure, and features are discussed, Design methodology is given. Both the...
This paper presents a faster and simpler approach for the calculation of iron and magnet losses of an IPMSM than Finite Element Analysis. It uses large elements and takes into account the magnetic saturation and magnet eddy currents. The machine is represented by its magnetic equivalent circuit, consisting of non-linear and constant reluctance elements and flux sources. Solution of non-linear magnetic...
This paper presents a torque-maximizing design of a double-stator, axial-flux PM machine using a simple non-linear magnetic analysis. The proposed analysis consists of a geometric- flux-tube-based equivalent-magnetic-circuit model. The model can take into account not only the magnetic saturation but also the three-dimensional(3D) flux distribution. The proposed analysis has realized a dramatic reduction...
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