Analytical and FE calculation of eddy-current losses in PM concentrated winding machines for wind turbines

Jassal, A.; Polinder, H.; Lahaye, Domenico; Ferreira, J.A.

doi:10.1109/iemdc.2011.5994899

Cited by 10 publications

(3 citation statements)

References 5 publications

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“…From the electromagnetic viewpoint, it features a 136-pole interior permanent-magnet (IPM) rotor and a fractional-slot concentrated stator winding design with a number q of slots per pole per phase less than unity [7]. One of the major concerns of generator operation to be investigated through full-load testing is constituted by rotor harmonic eddy-current losses due to the fractional-slot stator design [8], [9], [13].…”

Section: Introductionmentioning

confidence: 99%

Regenerative Testing of a Concentrated-Winding Permanent-Magnet Synchronous Machine for Offshore Wind Generation—Part I: Test Concept and Analysis

Luise

Pieri

Mezzarobba

et al. 2012

IEEE Trans. on Ind. Applicat.

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Some high-torque electric machines, such as lowspeed wind generators, may be very difficult to test on load because of the large and expensive mechanical equipment required to load them (motors) or to drive them (generators). In this paper, a full-load regenerative testing methodology is described which does not require any rotating equipment to be coupled to the machine where the rated active power flows in a closed loop between the machine and a suitably connected dual-stage converter. The successful application of this methodology to a 780-kW 14-r/min wind generator prototype is addressed as a study case. Relevant experimental results are reported in a companion paper.

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Section: Introductionmentioning

confidence: 99%

Regenerative Testing of a Concentrated-Winding Permanent-Magnet Synchronous Machine for Offshore Wind Generation—Part I: Test Concept and Analysis

Luise

Pieri

Mezzarobba

et al. 2012

IEEE Trans. on Ind. Applicat.

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“…where f e is the electrical frequency, B m is the maximum flux density of the iron; K h , k e , and K c are the losses constants due to the properties of the iron alloy known as hysteresis loss, Eddy current loss, and coupling loss respectively [13,17,22,32]. The Vol est of the radial flow PMSG was calculated with Equation ( 5)…”

Section: Iron Core Lossesmentioning

confidence: 99%

Dimensioning Optimization of the Permanent Magnet Synchronous Generator for Direct Drive Wind Turbines

et al. 2021

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In the present work, a methodology that allows optimizing the permanent magnet synchronous generator (PMSG) design by establishing limit values of magnet radius and length that maximize efficiency for the nominal parameters of the wind turbine is developed. The methodology consists of two fundamental models. One model calculates the generator parameters from the radius of the magnet base, and the other optimization model determines two optimum generators according to the optimization criteria of maximum efficiency and maximum efficiency with minimum weight starting from the axial length and the radius of the magnet base. For the optimization, the numerical method of the golden section was used. The model was validated from a 10 kW PMSG and the results of two optimum generators are presented according to the optimization criteria. In addition, when the obtained results are compared with the reference electric generator, an increase in efficiency of 1.15% and 0.81% and a reduction in weight of 30.79% and 39.15% of the optimized generators are obtained for maximum efficiency and minimum weight, respectively. Intermediate options between the maximum efficiency generator and the minimum weight generator allows for the selection of the optimum dimensioning for the electric generator as a function of the parameters from the wind turbine design.

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“…In this case, irreversible demagnetization can occur because of the temperature rise [ 1 ], therefore, it is of importance to calculate with accuracy these losses. This can be achieved by solving Maxwell's equations either analytically or numerically by using the FE method [ 2 , 3 ]. Nevertheless, the validation of the results remains quite difficult to realize on an electrical machine.…”

Section: Introductionmentioning

confidence: 99%

A Combined Experimental and Finite Element Analysis Method for the Estimation of Eddy-Current Loss in NdFeB Magnets

Frăţila

Bénabou

Tounzi

et al. 2014

Sensors

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NdFeB permanent magnets (PMs) are widely used in high performance electrical machines, but their relatively high conductivity subjects them to eddy current losses that can lead to magnetization loss. The Finite Element (FE) method is generally used to quantify the eddy current loss of PMs, but it remains quite difficult to validate the accuracy of the results with complex devices. In this paper, an experimental test device is used in order to extract the eddy current losses that are then compared with those of a 3D FE model.

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Analytical and FE calculation of eddy-current losses in PM concentrated winding machines for wind turbines

Cited by 10 publications

References 5 publications

Regenerative Testing of a Concentrated-Winding Permanent-Magnet Synchronous Machine for Offshore Wind Generation—Part I: Test Concept and Analysis

Regenerative Testing of a Concentrated-Winding Permanent-Magnet Synchronous Machine for Offshore Wind Generation—Part I: Test Concept and Analysis

Dimensioning Optimization of the Permanent Magnet Synchronous Generator for Direct Drive Wind Turbines

A Combined Experimental and Finite Element Analysis Method for the Estimation of Eddy-Current Loss in NdFeB Magnets

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