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1

A novel rotor design for a hybrid excited synchronous machine

Paplicki P.

Archives of Electrical Engineering

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2017

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Vol. 66, nr 1

29--40

EN

The paper presents three novel rotor design concepts for a three-phase electric controlled permanent magnet synchronous machine (ECPMS-machine) with hybrid excitation. The influence of magnets and flux-barriers arrangement on the magnetic field distribution and field-weakening characteristics of the machine is examined, based on a three-dimensional finite element analysis (3D-FEA). Moreover, a prototype rotor design based on a new rotor concept with a good field-weakening capability is presented in detail. Finally, the experimental results of no-load back electromotive force (back-EMF) waveforms and field-weakening characteristics versus a control coil current of the machine are reported.

2

Comparison of 2D and 3D FEM analysis of the magnetic field in a PM servo motor

Deeb R., Janda M., Makki Z.

Poznan University of Technology Academic Journals. Electrical Engineering

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2012

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No. 72

297--309

EN

Nowadays, the applications of the electrical machines with permanent magnets become very common, because of the outstanding properties of these devices in comparison with the induction machines. PM machines do not indicate electrical losses with the field excitation, which means increasing of their efficiency. This is a very important factor considering the urgent need of the energy conservation. Although, numerical methods for a field computation are time consuming, they provide accurate results without making any simplification of the geometry. The paper presents a comparison of 2D and 3D magnetic analysis of a PM servo motor. The analyzed servo motor is designed with a surface magnet rotor and produced by the VUES Brno company. The applied PM material is of rare earth type NdFeB. This material is characterized by a very high energy product. 2D model of this servo motor is created using AutoCAD program. The 2D magnetic analysis is computed using FEMM (finite element method magnetics). The 3D magnetic analysis is computed using a modem technique in the field of magnetic analysis of electrical machines. 3D model of the servo motor is generated using RMxprt program. The 3D magnetic analysis of the generated 3D model is computed using Maxwell 3D program. The program Maxwell 3D generates fine mesh automatically with a high accuracy. The distribution of the magnetic field inside the servo motor is computed for the case of the nominal current in both of 2D and 3D magnetic analysis. The distribution of the magnetic flux density according to the air gap length is presented too. The FEM (finite element method) is used for both 2D and 3D magnetic analysis of this servo motor.

3

Silnik magnetoelektryczny z płaskimi magnesami w układzie dwuwarstwowym w koncepcji pędnika tunelowego małej mocy do napędów podwodnych

Paplicki P.

Przegląd Elektrotechniczny

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2008

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R. 84, nr 4

30-32

PL

Artykuł prezentuje wykorzystanie płaskich magnesów przy tworzeniu skutecznych obwodów magnetycznych silnika z magnesami trwałymi o strukturze cylindrycznej w układzie dwuwarstwowym do napędu pędnika ok. 500 W i prędkości obrotowej 1000 obr/min. Na podstawie wyników badań symulacyjnych wyznaczono parametry eksploatacyjne silnika z magnesami płaskimi, które porównano z silnikiem z magnesami promieniowymi. Przedstawiono nową koncepcję konstrukcji pędnika tunelowego, zalet, wady oraz przykłady zastosowań w elektrotechnice morskiej.

EN

The paper presents application of planar permanent magnets for construction of effective magnetic circuits in dual layer cylindrical type of PM machines for low power propeller drives. On the basis of simulation results parameters of machines witch planar magnets in comparison with radial ones were estimated. New construction solutions, advantage, disadvantage and application in tunnel propeller drive are presented.