On the variation with flux and frequency of the core loss coefficients in electrical machines

Ionel, Dan M.; Popescu, Mircea; Dellinger, S.J.; Miller, T.J.E.; Heideman, R.J.; McGilp, M.I.

doi:10.1109/tia.2006.872941

Cited by 226 publications

(143 citation statements)

References 12 publications

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“…As a result, the 4-segmented model brought a minimum total iron loss of 182 (W), whereas the unbalance 2-segmented model draws on the maximum total iron loss by 241.4 (W). The calculation methodology is validated in [18][19][20][21][22]. Table 5 illustrates the THD over each single phase of back-EMF waveform, where it can be mentioned that mostly the highest percentage of THD is produced in the phase C in all the models.…”

Section: Em-based Study Results and Discussionmentioning

confidence: 99%

Electromagnetic-based evaluation of different Halbach array topologies with gap consideration for the permanent magnet synchronous machines

et al. 2017

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This paper investigates the influence of various Halbach arrays permanent magnets (PMs) on the electromagnetic performance of a radial flux machine with outer rotor topology. The static analysis is performed using a 2-D finite-element analysis (FEA) of six different machines with different Halbach array-based orientations. The gap consideration between PM segments is considered for the first time. The aim of the study is to find the most suitable magnetization topology determination for the PMSMs which brings maximum airgap flux density, coenergy, output torque turning, back-EMF, output electromagnetic power, and minimum corresponding harmonics, cogging torque and the likelihoods of saturation. Additionally, a comparative study of a continuous distribution that commercially is called polar anisotropic will be entirely discussed. The proposed model is verified by FEA, together with its experimental investigation for the small wind power generation application in the urban area. In addition, commercial and environmental issues of the project have been highly considered to reduce CO 2 emissions as the part of green power generation mission. List of symbolsCoenergy (

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Section: Em-based Study Results and Discussionmentioning

confidence: 99%

Electromagnetic-based evaluation of different Halbach array topologies with gap consideration for the permanent magnet synchronous machines

et al. 2017

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“…Therefore the torque performance of LSPMS motors will be improved substantially with application of Magnet Shifting. B is the maximum amplitude of the flux density and f is the frequency of exciting voltage [22]. As previously indicated magnet shifting deteriorates magnet mmf distribution symmetry in the air gap and produces extra harmonics in mmf and magnetic flux density spectra.…”

Section: Electromagnetic Torquementioning

confidence: 92%

Cogging Torque Reduction in Line Start Permanent Magnet Synchronous Motor

Behbahanifard¹,

Sadoughi²

2016

Journal of Electrical Engineering and Technology

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-Cogging torque has a negative impact on the operation of permanent magnet machines by increasing torque ripple, speed ripple, acoustic noise and vibration. In this paper Magnet Shifting Method has been used as a tool to reduce the cogging torque in inset Line Start Permanent Magnet Synchronous Motor (LSPMSM). It has been shown that Magnet Shifting Method can effectively eliminate several lower-order harmonics of cogging torque. In order to implement the method, first the expression of cogging torque is studied based on the Fourier analysis. An analytical expression is then introduced based on Permanent Magnet Shifting to reduce cogging torque of LSPMS motors. The method is applied to some existing machine designs and their performances are obtained using Finite Element Analysis (FEA). The effect of magnet shifting on pole mmf (magneto motive force) distribution in air gap is discussed. The side effects of magnet shifting on back-EMF, core losses and torque profile distortion are taken into account in this investigation. Finally the experimental results on two prototypes 24 slot 4 pole inset LSPMS motors have been used to validate the theoretical analysis.

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“…K e and K h are eddy-current and hysteresis loss coefficient respectively. In this case, the excess loss component is included in the eddy-current loss [4].…”

Section: Numerical Computation Methodsmentioning

confidence: 99%

Investigation on Performance Characteristics of IPM for Electric Vehicles Considering Driving Conditions and Pole-Slot Combinations

Seo¹

2013

Journal of Magnetics

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This paper shows the characteristics of performance for interior permanent magnet machine (IPM) considering driving conditions such as maximum torque per ampere (MTPA) and flux-weakening control especially in terms of harmonic loss. In particular, based on finite element analysis (FEA), permanent magnet (PM) eddycurrent loss and the harmonic iron loss have been computed where the models have been intentionally designed to identify the effects of pole-slot combinations on the loss while maintaining the required power for electric vehicle. From the analysis results, it was shown that the rotor iron loss and PM eddy-current loss of machine employing fractional slot winding are extremely large at load condition. Furthermore, it was revealed that the harmonic iron loss at high-speed operation is mainly distributed over stator teeth and rotor surface, which may aggravate cooling system of the rotor structure in the vehicle.

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On the variation with flux and frequency of the core loss coefficients in electrical machines

Cited by 226 publications

References 12 publications

Electromagnetic-based evaluation of different Halbach array topologies with gap consideration for the permanent magnet synchronous machines

Electromagnetic-based evaluation of different Halbach array topologies with gap consideration for the permanent magnet synchronous machines

Cogging Torque Reduction in Line Start Permanent Magnet Synchronous Motor

Investigation on Performance Characteristics of IPM for Electric Vehicles Considering Driving Conditions and Pole-Slot Combinations

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