Core Loss Analysis of Permanent Magnet Synchronous Generator With Slotless Stator

Kim, Chang-Woo; Koo, Min-Mo; Kim, Jeong-Man; Ahn, Jinsook; Hong, Keyyong; Choi, Jang-Young

doi:10.1109/tasc.2018.2802904

Cited by 9 publications

(9 citation statements)

References 10 publications

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“…Stator core losses consist of hysteresis losses, eddy current losses, and excess eddy current losses [21][22][23][24][25], which we analyzed by using the modified Steinmetz method. Figure 9 shows the calculation process of the stator core loss considering the magnetic field behavior and harmonics.…”

Section: Core Losses In the Stator Corementioning

confidence: 99%

“…The alternating and rotating magnetic fields can be determined from the major and minor axes of the elliptic magnetic flux density, and the axis ratio (Bmin/Bmax) can be calculated according to the loci of the flux density through the FFT analysis for each harmonic [22,23]. When the axis ratio is >0.1, it is considered a rotating magnetic field, and First, curve fitting was performed on core loss data according to the magnetic flux density and the frequency provided by electric steel manufacturers [21].…”

Section: Core Losses In the Stator Corementioning

confidence: 99%

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Investigation of Electromagnetic Losses Considering Current Harmonics in High-Speed Permanent Magnet Synchronous Motor

Lee

Sung²,

Cho

et al. 2022

Energies

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This paper presents a characteristic analysis and experimental verification for predicting the electromagnetic losses in high-speed permanent magnet synchronous motors. To predict the operating characteristics (such as speed and input current), dynamic modeling is conducted that combines models for the space vector pulse width modulation (SVPWM) inverter and high-speed permanent magnet synchronous motor (HPMSM). By applying the predicted harmonic currents to the electromagnetic analysis, DC and AC copper losses of the stator winding, and eddy current loss of the rotor sleeve and rotor permanent magnet, are comprehensively analyzed using the finite element (FE) method. In particular, by analyzing the magnetic field behavior of magnetic flux density according to harmonics, a core loss analysis technique was presented. The validity of the hybrid analysis, which combines the stator copper loss and rotor eddy current loss derived from the FE analysis and the proposed core loss analysis, was verified through comparison with the experimental results under various operating conditions. Compared with the experimental results, the error of total losses using the hybrid analysis with a sinusoidal current was about 47.39%, and total losses using the hybrid analysis with a harmonic current was significantly improved to within 3.7%.

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Section: Core Losses In the Stator Corementioning

confidence: 99%

Section: Core Losses In the Stator Corementioning

confidence: 99%

Investigation of Electromagnetic Losses Considering Current Harmonics in High-Speed Permanent Magnet Synchronous Motor

Lee

Sung²,

Cho

et al. 2022

Energies

Self Cite

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show abstract

“…Therefore, magnetic field behavior analysis is very important in core-loss analysis. The magnitude of the core-loss varies according to the magnetic field behavior characteristics, and the magnetic flux density generated by the harmonics increases the core-loss, so for accurate core-loss prediction, an accurate core-loss analysis should be performed by considering the harmonics and the magnetic field behavior [13]. Therefore, in order to increase the precision of the core-loss analysis, each analysis area was subdivided and calculated for magnetic field behavior analysis, and magnetic flux density analysis of linear magnetic gears through FEM.…”

Section: Magnetic Field Behavior Analysismentioning

confidence: 99%

Core-Loss Analysis of Linear Magnetic Gears Using the Analytical Method

et al. 2021

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In this study, analysis of core-loss occurring in the magnetic flux modulation core of a linear magnetic gear and the core of each mover is presented, using an analytical method. Losses in electric machines were generally calculated and analyzed using the finite element method (FEM). However, in the case of core-loss, the exact loss value could not be calculated using FEM data. Therefore, we considered the harmonic component of the air-gap magnetic flux density waveform with the modified Steinmetz equation, and performed a more accurate core-loss analysis with magnetic behavior analysis. Thus, we performed a calculated core-loss characteristic comparison with the FEM and the modified Steinmetz equation.

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“…The results showed that the high-order current harmonics generated by PWM greatly increase the core loss of the motor and the eddy current loss of the permanent magnet, and the segmented structure of the permanent magnet could effectively reduce the eddy current loss [8]. In [9], Zhang Yuelei and others used finite element co-simulation to simulate the core loss, copper loss, and eddy current loss of the V-type interior PMSM (IPMSM) under SVPWM control, and analyzed the influence of the SVPWM carrier ratio and modulation ratio on the motor loss. In [10,11], Xiao Chengdong et al took a 5.5 kW motor as an example, and then established the SVPWM control model of the motor, and simulated the output voltage waveforms at different operating points of the motor, and then analyzed the different carrier frequencies and carrier frequencies of the motor using finite element simulation.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Core Loss of Permanent Magnet Synchronous Machine for Vehicle Applications under Different Operating Conditions

Yang

Zhang

2020

Applied Sciences

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Permanent magnet synchronous machines (PMSMs) are widely used in electric vehicles due to their high power density, high efficiency, etc. Core losses account for a significant component of the total loss in PMSMs. Therefore, it is necessary to carefully consider it when designing PMSMs according to actual scientific research project applications. This paper extracts the characteristic operating points of the PMSMs under different operating conditions at different speeds. Then a harmonic analysis of air-gap flux density, phase current, core loss was completed, and detailed comparative analysis was performed. A novel method for comprehensively analyzing the stator core loss of PMSMs for vehicles is proposed, which reveals the law of the core loss of the PMSM under Maximum-Torque-Per-Ampere (MTPA) and Space Vector Pulse Width Modulation (SVPWM). The method was verified by a prototype experiment where the actual core loss of PMSMs was measured to verify the correctness of the method. This research provides a reference for accurately predicting core loss during the forward design of PMSMs and completing core loss evaluation for existing PMSMs.

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Core Loss Analysis of Permanent Magnet Synchronous Generator With Slotless Stator

Cited by 9 publications

References 10 publications

Investigation of Electromagnetic Losses Considering Current Harmonics in High-Speed Permanent Magnet Synchronous Motor

Investigation of Electromagnetic Losses Considering Current Harmonics in High-Speed Permanent Magnet Synchronous Motor

Core-Loss Analysis of Linear Magnetic Gears Using the Analytical Method

Analysis of Core Loss of Permanent Magnet Synchronous Machine for Vehicle Applications under Different Operating Conditions

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