Estimation of PWM-Induced Iron Loss in IPM Machines Incorporating the Impact of Flux Ripple Waveshape and Nonlinear Magnetic Characteristics

Chang, Le; Jahns, T.M.; Blissenbach, Rolf

doi:10.1109/tia.2019.2961074

Cited by 35 publications

(5 citation statements)

References 24 publications

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“…Therefore, the iron loss analyzed in the frequency domain at 8000 Hz was also affected by those harmonics. The iron loss density at 8000 Hz are shown in Figure 6c,d [21].…”

Section: Comparison Of Loss Analysis Using the Ideal Current Source And The Proposed Methodsmentioning

confidence: 99%

Analysis and Verification of Traction Motor Iron Loss for Hybrid Electric Vehicles Based on Current Source Analysis Considering Inverter Switching Carrier Frequency

Lee¹,

Kim²,

Jung

2021

Electronics

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In this study, a current source analysis method considering the inverter switching frequency is proposed to improve the precision of loss analysis of a traction motor for a hybrid electric vehicle. Because the iron loss of the traction motor is sensitively influenced by input current fluctuations, the current source analysis using the actual current obtained from an inverter is the ideal method for accurate analysis. However, as the traction motor and inverter should be manufactured to obtain the real current, the traction motor is generally designed based on an ideal current source analysis. Our proposed method is an analytic technique that fits the loss of a traction motor similar to the actual loss by injecting harmonics of the same order of the inverter switching frequency into the ideal input current. Our method is compared with the analysis of the ideal current source to assess the difference in loss. In addition, a test motor was manufactured, and an efficiency test was conducted to compare the efficiency and verify the effectiveness of our method.

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“…Therefore, the iron loss analyzed in the frequency domain at 8000 Hz was also affected by those harmonics. The iron loss density at 8000 Hz are shown in Figure 6c,d [21].…”

Section: Comparison Of Loss Analysis Using the Ideal Current Source And The Proposed Methodsmentioning

confidence: 99%

Analysis and Verification of Traction Motor Iron Loss for Hybrid Electric Vehicles Based on Current Source Analysis Considering Inverter Switching Carrier Frequency

Lee¹,

Kim²,

Jung

2021

Electronics

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“…Surface-mounted permanent magnets present design advantages due to the creation of a strong magnetic field in the gap of electric motors, but are sensitive to the development of eddy currents and respective losses [82], while internal magnet configurations involve dominant losses in neighboring laminated iron parts [83]. These are generated by Consequently, the first FEA analysis is performed with the standard representation of the permanent magnet and then according to the local magnetization results a recursive algorithm introduces the new recoil curves consecutively, if needed.…”

Section: Combined Permanent Magnet and Lamination Loss Modellingmentioning

confidence: 99%

“…Surface-mounted permanent magnets present design advantages due to the creation of a strong magnetic field in the gap of electric motors, but are sensitive to the development of eddy currents and respective losses [82], while internal magnet configurations involve dominant losses in neighboring laminated iron parts [83]. These are generated by harmonic phenomena due to stator slotting during rotor rotation and switching frequency effects involved in pulse-width modulation techniques applied in the inverter supply [84].…”

Section: Combined Permanent Magnet and Lamination Loss Modellingmentioning

confidence: 99%

Overview on Permanent Magnet Motor Trends and Developments

Vlachou,

Sakkas,

Xintaropoulos

et al. 2024

Energies

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The extreme environmental issues and the resulting need to save energy have turned attention to the electrification of energy applications. One of the key components involved in energy efficiency improvements is the appropriate conception and manufacturing of electric machines. This paper overviews the electromagnetic analysis governing the behavior of permanent magnets that enable substantial efficiency gains in recent electric machine developments. Particular emphasis is given to modeling the properties and losses developed in permanent magnets in emerging high speed applications. In addition, the investigation of properties and harmonic losses related to ferromagnetic materials constituting the machine magnetic circuits are equally analyzed and discussed. The experimental validation of the implemented methodologies and developed models with respect to the obtained precision is reported. The introduction of mixed numerical techniques based on the finite element method intended to appropriately represent the different physical phenomena encountered is outlined and discussed. Finally, fast and accurate simulation techniques including aggregated lumped parameter models considering harmonic losses associated with inverter supplies are discussed.

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“…Thus, some doubts arose if higher iron losses will be obtained for the new design or not. As the accurate iron loss calculation in case of multiple flux density harmonics is non-trivial and still an open research topic [29], [30], [31], it was decided to not consider the iron losses for efficiency determination.…”

Section: E Current Waveform Optimizationmentioning

confidence: 99%

Optimization of PMSMs Considering Multi-Harmonic Current Waveforms: Theory, Design Aspects, and Experimental Verification

Bramerdorfer

Amrhein

2023

IEEE Trans. on Ind. Applicat.

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This article is about investigating the potential of multi-harmonic design of permanent magnet synchronous machines. Thereby, multi-harmonic refers to the temporal periodic characteristics of linked fluxes and currents of the stator phases in order to ensure high-efficient operation with very low torque ripple. At first, a suitable model allowing for multi-harmonic currents evaluation is derived. Consequently, an interior-rotor IPM machine is studied. In order to have a fair comparison with conventional PMSMs featuring sinusoidal currents, an optimization scenario is defined where the same outer dimensions as well as magnet and copper volume for both design variants are considered. The use of multiple current harmonics requires a dedicated strategy for evaluating machine designs, as the conventional dq-grid analysis cannot be utilized. The introduced approach is applied and results of the optimization are illustrated. Prototypes were manufactured and machine designs were subsequently evaluated through experiments. A valuable lesson learned during practical implementation regarding rotor angle determination is highlighted. Measurement results reveal that adding more degrees of freedom in terms of multiple harmonics can give significant improvements for performance measures efficiency and torque ripple. This particularly holds if the harmonics are already considered throughout the machine design and optimization process, rather than only at post-processing stage.

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Estimation of PWM-Induced Iron Loss in IPM Machines Incorporating the Impact of Flux Ripple Waveshape and Nonlinear Magnetic Characteristics

Cited by 35 publications

References 24 publications

Analysis and Verification of Traction Motor Iron Loss for Hybrid Electric Vehicles Based on Current Source Analysis Considering Inverter Switching Carrier Frequency

Analysis and Verification of Traction Motor Iron Loss for Hybrid Electric Vehicles Based on Current Source Analysis Considering Inverter Switching Carrier Frequency

Overview on Permanent Magnet Motor Trends and Developments

Optimization of PMSMs Considering Multi-Harmonic Current Waveforms: Theory, Design Aspects, and Experimental Verification

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