Performance Analysis of Magnetically Geared Permanent Magnet Brushless Motor for Hybrid Electric Vehicles

Jing, Libing; Tang, Weizhao; Wang, Tao; Ben, Tong; Qu, Ronghai

doi:10.1109/tte.2022.3151681

Cited by 86 publications

(24 citation statements)

References 23 publications

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“…Furthermore, the FEA result of the tangential stress of the rotor sleeve is simulated with the roundness error, as shown in Figure 16. According to the calculation results in the previous Table 4, Figure 16 shows the relationship between the roundness error A Err and the tangential stress σ θe on the outer surface of the rotor, and fit the expression of the function between the amplitude of roundness error A Err and the tangential stress σ θe on the outer surface of the rotor according to the calculation results: σ θe = 25.24 − 20.053e − A Err 11.77 (28) where A Err is the ellipsoidal roundness error on the outer surface of the rotor of the high-speed motor, and σ θe is the tangential stress on the outer surface of the rotor at this amplitude of roundness error. This is of central importance for the design of high-speed motor rotor.…”

Section: The Variation Law Of Air Friction Loss On the Outer Surface ...mentioning

confidence: 99%

“…Since the additional loss is constant and has nothing to do with the speed, there is no need to analyze and calculate it. The relevant loss calculation formula is as follows [27,28] When the forced cold air inlet velocity is 10 m/s, the FE calculation results of the air friction loss of the motor are shown in Figure 28. In addition, based on the Leven-berg-Marquardt method [20], the fitted curve of air friction loss versus frequency is shown in Figure 28.…”

Section: Experimental Verificationmentioning

confidence: 99%

“…Since the additional loss is constant and has nothing to do with the speed, there is no need to analyze and calculate it. The relevant loss calculation formula is as follows [27,28]:…”

Section: Experimental Verificationmentioning

confidence: 99%

See 2 more Smart Citations

Rotor Investigation of High-Speed Permanent Magnet Motor with Roundness Error and CFD-Thermal Distribution Analysis

Zhao

et al. 2022

Energies

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The rotor overtemperature caused by losses is one of the important issues for the high-speed electrical machine. This paper focuses on the rotor loss analysis and CFD-thermal coupling evaluation for 105 kW, 36,000 r/min HSPMSM. Three types of sleeve materials as carbon-fiber, Titanium alloy, and stainless steel are introduced in this paper, researching the effects of sleeve conductivity, thickness and rotational speed on rotor eddy current loss, balancing rotor mechanical strength. The sleeve made of titanium alloy material with a thickness of 3.5 mm is chosen to effectively suppress the rotor eddy current loss in high-speed motors in the paper. The air friction loss becomes significant based on the PM motor at high rotational speed. The roundness error of the rotor sleeve has the important impact on the air friction loss of the rotor and the rotor temperature of the motor, which leads to the over temperature of the rotor. Therefore, based on the CFD fluid model, the influence of roundness error, cooling parameters, rotational speed and temperature boundary on the air friction loss is studied in detail, and the expression is summarized to provide reference for estimating the air friction loss. According to the rotor structure in this paper, the optimal cooling air inlet velocity is 10 m/s. Finally, the loss separation method is used to obtain the air friction loss measurement results. The accuracy of the finite element calculation results of air friction loss is verified through the experimental data. The temperature rise of the HSPMSM was also measured with 5.5% error. In this paper, the conclusion and analysis method could provide some reference for the research of the rotor structure and the improvement of the efficiency of HSPMMs.

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Section: The Variation Law Of Air Friction Loss On the Outer Surface ...mentioning

confidence: 99%

Section: Experimental Verificationmentioning

confidence: 99%

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Rotor Investigation of High-Speed Permanent Magnet Motor with Roundness Error and CFD-Thermal Distribution Analysis

Zhao

et al. 2022

Energies

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“…The optimization procedure of the proposed machine is shown in Figure 7. The genetic algorithm (GA) is employed as the optimization algorithm [21][22][23][24]. Firstly, the optimization targets are set as the LSR torque, ripples of two rotors while the population quantity is selected as 100 considering the computing power.…”

Section: Optimization Algorithmmentioning

confidence: 99%

“…The optimization procedure of the proposed machine is shown in Figure 7. The genetic algorithm (GA) is employed as the optimization algorithm [21–24].…”

Section: Optimization and Comparisonmentioning

confidence: 99%

Design and optimization of yokeless magnetic gear with asymmetric Halbach permanent magnet array for electric vehicle powertrain

Chen

Zhao

et al. 2022

IET Renewable Power Gen

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In this paper, a novel 3/27/24 (pole pairs of inner rotor permanent magnet [PM]s/modulator/outer rotor PMs) high torque density yokeless magnetic gear with asymmetric Halbach PM array is presented and optimized for electric vehicle powertrain. The key is to improve the torque performance by replacing the magnetic steel with the light nonmagnetic material as the rotor core and employing the embedded magnetic steel bar as well as trapezoidal PM structure to form a low magnetic resistance in the magnetic circuit. The proposed machine has significant performance improvements in two aspects. Firstly, it has high torque density and low iron loss with the yokeless structure. Secondly, it has a high anti-saturation capability and low torque ripple with the asymmetric Halbach PM array and the embedded magnetic steel bar. The proposed structure is optimized by the co-simulation of the finite-element method and C++ optimization software. For a clear evaluation, the proposed structure is compared with generalized solutions in terms of performance and cost. Comparison results indicate that the proposed solution has the highest output torque, torque density, and torque per PM weight among solutions, reaching 214.1 N⋅m, 58.2 N⋅m/kg, and 95.6 N⋅m/kg, which greatly enhances the performance of the magnetic gear.

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Analytical Model of Air‐Gap Magnetic Field for Eccentric Harmonic Magnetic Gear with Halbach Array

Liu,

Zhang

et al. 2023

IEEJ Transactions Elec Engng

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The eccentric harmonic magnetic gear (EHMG) has the characteristics of high torque density, high transmission ratio and high efficiency. The EHMG with Halbach array has better performance than the EHMG with traditional radial magnetization. Accurate calculation of its air‐gap magnetic field is of great significance for design and optimization. Based on the boundary perturbation method, a 2D analytical model of the air‐gap magnetic field of EHMG with Halbach array is established in this paper. The eccentric air‐gap magnetic field is calculated due to the permanent magnets of the eccentric rotor and the stator acting alone, and then the air‐gap magnetic field of the EHMG is obtained according to the superposition principle. The results of the air‐gap magnetic field are compared and evaluated by the regression evaluation indexes. The analytical results are consistent with the finite element results, which verifies the validity and accuracy of the analytical model. Comparing the EHMG with Halbach array and radial magnetization, the maximum static and dynamic electromagnetic torques of EHMG with Halbach array are increased by 59.1% and 55.6% compared with the EHMG with radial magnetization, which verifies the superior performance of EHMG with Halbach array. © 2023 Institute of Electrical Engineer of Japan and Wiley Periodicals LLC.

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Performance Analysis of Magnetically Geared Permanent Magnet Brushless Motor for Hybrid Electric Vehicles

Cited by 86 publications

References 23 publications

Rotor Investigation of High-Speed Permanent Magnet Motor with Roundness Error and CFD-Thermal Distribution Analysis

Rotor Investigation of High-Speed Permanent Magnet Motor with Roundness Error and CFD-Thermal Distribution Analysis

Design and optimization of yokeless magnetic gear with asymmetric Halbach permanent magnet array for electric vehicle powertrain

Analytical Model of Air‐Gap Magnetic Field for Eccentric Harmonic Magnetic Gear with Halbach Array

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