The Experts below are selected from a list of 11475 Experts worldwide ranked by ideXlab platform
Zlatko Hanic - One of the best experts on this subject based on the ideXlab platform.
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on load analysis of saturated surface permanent magnet machines using Conformal Mapping and magnetic equivalent circuits
IEEE Transactions on Energy Conversion, 2018Co-Authors: Ana Hanic, Dami Zarko, Dalibo Kuhinek, Zlatko HanicAbstract:This paper presents an iterative method based on Conformal Mapping and magnetic equivalent circuits for on-load analysis of saturated surface permanent magnet machines with integer slot and fractional slot windings. Magnetic saturation is taken into account by defining additional point wires in the stator slots and interpolar region between the magnets. The added point wires create magnetomotive force equal to the magnetic voltage drops across iron core flux tubes that are calculated using magnetic equivalent circuit. An improved stator tooth model has been introduced that enables more accurate field calculations for tooth geometries with highly saturated tooth tips. The model also takes into account variation of permanent magnet magnetization due to external magnetic field. The proposed method has been implemented on a saturated 12 slot, 10 pole surface permanent magnet machine with nonoverlapping concentrated winding and shows a very good agreement with finite element calculations in terms of flux density, back electromotive force, and torque waveforms as well as $d$ - and $q$ -axis inductances, cross-saturation inductance, and permanent magnet flux linkage in both axes.
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a novel method for no load magnetic field analysis of saturated surface permanent magnet machines using Conformal Mapping and magnetic equivalent circuits
IEEE Transactions on Energy Conversion, 2016Co-Authors: Ana Hanic, Dami Zarko, Zlatko HanicAbstract:The paper presents a method for calculating the back electromotive force and cogging torque waveforms of surface permanent-magnet motors using a model based on Conformal Mapping and magnetic equivalent circuits. The model takes into account the saturation of the iron core and its variation due to rotor movement. Because of the shorter execution time and achieved accuracy, it represents a good alternative to time-consuming finite-element-based models, especially in an initial stage of motor design. The proposed method has been implemented and evaluated on selected examples of 36-slot / 6-pole motors with different levels of saturation in teeth and stator yoke, and shows excellent agreement with the results obtained using finite-element method.
Mohamed M. S. Nasser - One of the best experts on this subject based on the ideXlab platform.
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numerical Conformal Mapping and its inverse of unbounded multiply connected regions onto logarithmic spiral slit regions and straight slit regions
Proceedings of The Royal Society A: Mathematical Physical and Engineering Sciences, 2014Co-Authors: Arif A M Yunus, Ali Hassan Mohamed Murid, Mohamed M. S. NasserAbstract:This paper presents a boundary integral equation method with the adjoint generalized Neumann kernel for computing Conformal Mapping of unbounded multiply connected regions and its inverse onto several classes of canonical regions. For each canonical region, two integral equations are solved before one can approximate the boundary values of the Mapping function. Cauchy's-type integrals are used for computing the Mapping function and its inverse for interior points. This method also works for regions with piecewise smooth boundaries. Three examples are given to illustrate the effectiveness of the proposed method.
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linear integral equations for Conformal Mapping of bounded multiply connected regions onto a disk with circular slits
Applied Mathematics and Computation, 2011Co-Authors: Ali Hassan Mohamed Murid, Mohamed M. S. Nasser, Ali W. K. SangawiAbstract:Abstract In this paper we present a boundary integral equation method for the numerical Conformal Mapping of bounded multiply connected region Ω onto a disk with circular slits. The method is based on some uniquely solvable boundary integral equations with classical adjoint and generalized Neumann kernels. These boundary integral equations are constructed from a boundary relationship satisfied by a function analytic on a multiply connected region. Some numerical examples are presented to illustrate the efficiency of the presented method.
Ana Hanic - One of the best experts on this subject based on the ideXlab platform.
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on load analysis of saturated surface permanent magnet machines using Conformal Mapping and magnetic equivalent circuits
IEEE Transactions on Energy Conversion, 2018Co-Authors: Ana Hanic, Dami Zarko, Dalibo Kuhinek, Zlatko HanicAbstract:This paper presents an iterative method based on Conformal Mapping and magnetic equivalent circuits for on-load analysis of saturated surface permanent magnet machines with integer slot and fractional slot windings. Magnetic saturation is taken into account by defining additional point wires in the stator slots and interpolar region between the magnets. The added point wires create magnetomotive force equal to the magnetic voltage drops across iron core flux tubes that are calculated using magnetic equivalent circuit. An improved stator tooth model has been introduced that enables more accurate field calculations for tooth geometries with highly saturated tooth tips. The model also takes into account variation of permanent magnet magnetization due to external magnetic field. The proposed method has been implemented on a saturated 12 slot, 10 pole surface permanent magnet machine with nonoverlapping concentrated winding and shows a very good agreement with finite element calculations in terms of flux density, back electromotive force, and torque waveforms as well as $d$ - and $q$ -axis inductances, cross-saturation inductance, and permanent magnet flux linkage in both axes.
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a novel method for no load magnetic field analysis of saturated surface permanent magnet machines using Conformal Mapping and magnetic equivalent circuits
IEEE Transactions on Energy Conversion, 2016Co-Authors: Ana Hanic, Dami Zarko, Zlatko HanicAbstract:The paper presents a method for calculating the back electromotive force and cogging torque waveforms of surface permanent-magnet motors using a model based on Conformal Mapping and magnetic equivalent circuits. The model takes into account the saturation of the iron core and its variation due to rotor movement. Because of the shorter execution time and achieved accuracy, it represents a good alternative to time-consuming finite-element-based models, especially in an initial stage of motor design. The proposed method has been implemented and evaluated on selected examples of 36-slot / 6-pole motors with different levels of saturation in teeth and stator yoke, and shows excellent agreement with the results obtained using finite-element method.
Dami Zarko - One of the best experts on this subject based on the ideXlab platform.
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on load analysis of saturated surface permanent magnet machines using Conformal Mapping and magnetic equivalent circuits
IEEE Transactions on Energy Conversion, 2018Co-Authors: Ana Hanic, Dami Zarko, Dalibo Kuhinek, Zlatko HanicAbstract:This paper presents an iterative method based on Conformal Mapping and magnetic equivalent circuits for on-load analysis of saturated surface permanent magnet machines with integer slot and fractional slot windings. Magnetic saturation is taken into account by defining additional point wires in the stator slots and interpolar region between the magnets. The added point wires create magnetomotive force equal to the magnetic voltage drops across iron core flux tubes that are calculated using magnetic equivalent circuit. An improved stator tooth model has been introduced that enables more accurate field calculations for tooth geometries with highly saturated tooth tips. The model also takes into account variation of permanent magnet magnetization due to external magnetic field. The proposed method has been implemented on a saturated 12 slot, 10 pole surface permanent magnet machine with nonoverlapping concentrated winding and shows a very good agreement with finite element calculations in terms of flux density, back electromotive force, and torque waveforms as well as $d$ - and $q$ -axis inductances, cross-saturation inductance, and permanent magnet flux linkage in both axes.
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a novel method for no load magnetic field analysis of saturated surface permanent magnet machines using Conformal Mapping and magnetic equivalent circuits
IEEE Transactions on Energy Conversion, 2016Co-Authors: Ana Hanic, Dami Zarko, Zlatko HanicAbstract:The paper presents a method for calculating the back electromotive force and cogging torque waveforms of surface permanent-magnet motors using a model based on Conformal Mapping and magnetic equivalent circuits. The model takes into account the saturation of the iron core and its variation due to rotor movement. Because of the shorter execution time and achieved accuracy, it represents a good alternative to time-consuming finite-element-based models, especially in an initial stage of motor design. The proposed method has been implemented and evaluated on selected examples of 36-slot / 6-pole motors with different levels of saturation in teeth and stator yoke, and shows excellent agreement with the results obtained using finite-element method.
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analytical solution for electromagnetic torque in surface permanent magnet motors using Conformal Mapping
IEEE Transactions on Magnetics, 2009Co-Authors: Dami Zarko, Drago A, T A LipoAbstract:We present an analytical method for the calculation of electromagnetic torque in surface permanent-magnet (PM) motors. Our method uses Conformal Mapping to calculate the electromagnetic torque by integrating the Maxwell stress tensor inside the air gap. It uses the radial and tangential components of the flux density in the slotted air-gap produced by the currents flowing in the three-phase armature winding. We demonstrate our analytical solution on a 7-kW four-pole surface PM motor and compare the results with finite-element solutions. We present the results for various angular spans of permanent magnets and various sizes of the slot opening to confirm the validity of the analytical approach.
Karim Abbaszadeh - One of the best experts on this subject based on the ideXlab platform.
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magnetic field analysis in eccentric surface mounted permanent magnet motors using an improved Conformal Mapping method
IEEE Transactions on Energy Conversion, 2016Co-Authors: Farhad Rezaee Alam, Karim AbbaszadehAbstract:This paper presents an improved Conformal Mapping (ICM) method for magnetic field analysis in one typical surface-mounted permanent-magnet (SMPM) motor considering the static, dynamic, and mixed rotor eccentricities. The ICM method accurately accounts for the slotting effect, the winding distribution, the armature reaction, the magnetic saturation effect, and the working point variation of PMs throughout their volume. The ICM method is also very rigorous to separate the onload air gap field components. First, the slotless model of an eccentric SMPM motor is mapped to one concentric model using a new form of bilinear Conformal Mapping, and the field solution is then obtained through applying Hague's solution in the main canonical domain. Second, the slotted air gap magnetic field is obtained through the modulation of air gap magnetic field in the slotless physical domain using the complex relative air gap permeance. The ICM method is also used to investigate the influence of rotor eccentricity on the flux linkage of the stator coils. This developed model is validated through comparing with the corresponding results obtained through finite element method and the frozen permeability method. This method can also be used as a tool for design and optimization of electrical machines.