The research on mechanical properties of direct drive high-speed permanent-magnet machine for compression

Wang, Tianyu; Ma, Zhenjie; Chen, Zhang; Zhang, Fengge; Yin, Xiaowei

doi:10.1109/icems.2015.7385170

Cited by 8 publications

(3 citation statements)

References 5 publications

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“…q is the heat source density, which is directly imported from the above eddy current loss density. Two kinds of boundary conditions are imposed on rotor surfaces: Γ 1 and Γ 2 , as in (5), where n x , n y , and n z denote the scalar projection of the outward unit normal vector in x-, y-, and z-axis directions. Γ 1 specifies the convection heat transfer coefficient h, between the end caps and ambient air.…”

Section: A Governing Equationsmentioning

confidence: 99%

“…Consequently, the air-gap flux density is lowered, and large eddy current loss is produced in NRS when it is made of metallic material. Commonly used materials for NRS include carbon fiber composite [4], glass fiber composite [5], and high-strength alloys, such as Inconel 718 [6] and titanium alloy [7]. Using a composite sleeve can reduce eddy current loss in the sleeve itself, but inevitably increases this loss in PMs [8].…”

Section: Introductionmentioning

confidence: 99%

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Rotor Eddy Current Loss Reduction With Permeable Retaining Sleeve for Permanent Magnet Synchronous Machine

Zhu

Huang

Dong

et al. 2020

IEEE Trans. Energy Convers.

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This paper presents a new rotor design to reduce rotor eddy current loss of a high-speed permanent magnet synchronous machine for flywheel energy storage system. Instead of using common nonmagnetic sleeves, the new rotor incorporates permeable retaining sleeves (PRSs) to fix permanent magnets on the rotor hub. The PRSs are made of permalloy that features high permeability and high electrical conductivity. Thus, skin depths for asynchronous harmonics are extremely small. On the other hand, the PRSs are electrically insulated along the circumferential direction. Owing to these two reasons, rotor eddy current loss at open circuit decreases by 64.2% without sacrificing torque output, compared with an original rotor with nonmagnetic retaining sleeve. In addition, thermal and structural finite element analyses are performed to calculate rotor temperature distribution and evaluate the structural integrity of the new rotor. Rotor eddy current loss reduction benefits lowering rotor temperature rise. Prototype machine with the new rotor is fabricated, and preliminary tests are carried out to confirm the analysis results.

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Section: A Governing Equationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Rotor Eddy Current Loss Reduction With Permeable Retaining Sleeve for Permanent Magnet Synchronous Machine

Zhu

Huang

Dong

et al. 2020

IEEE Trans. Energy Convers.

View full text Add to dashboard Cite

show abstract

“…Analytical models of composite material sleeves are more complicated than those for metallic sleeves because the composites are anisotropic materials. Some research articles have presented analytical models of composite material sleeves under the assumption that it is isotropic [16][17][18][19][20][21][22][23]. A few papers have conducted numerical analyses of composite sleeves as anisotropic materials.…”

Section: Introductionmentioning

confidence: 99%

Rotor Design, Analysis and Experimental Validation of a High-Speed Permanent Magnet Synchronous Motor for Electric Turbocharger

Lee

Hong

2022

IEEE Access

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We developed a high-speed surface mounted permanent magnet synchronous motor (SPMSM) and a pulse width modulation (PWM)-driven inverter for a turbocharger with an additional electrically driven compressor (TEDC). These systems operate at 70,000 rpm and are intended to fit 1.6L diesel vehicles to reduce turbo lag to within 0.4 sec. There are key issues in the design of rotors for SPM type machines. To prevent the PM from scattering during high-speed operation, a retaining sleeve is necessary in the rotor. Several studies have reported on rotor design and the effect of retaining sleeve materials, but no papers have applied appropriate modeling and analysis to composite material sleeves. In this study, a specialized tool was used to obtain accurate results for a composite material sleeve. The results of theoretical analyses and finite element analyses (FEA) of rotors with metallic and composite sleeves were compared, considering various stress sources such as interference fit, centrifugal force and temperature gradient. In addition, rotor dynamics and transient response analyses were performed using the proposed models to verify structural stability and response time. The proposed rotor was assembled with the stator and tested in connection with the 1.6L diesel engine. It was confirmed that the transient acceleration performance was improved by 49.14%.

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Uncontrollable phenomenon and digital control delay analysis for high-speed permanent magnet synchronous motor drive

Wang

Deng

2017

2017 20th International Conference on Electrical Machines and Systems (ICEMS)

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The research on mechanical properties of direct drive high-speed permanent-magnet machine for compression

Cited by 8 publications

References 5 publications

Rotor Eddy Current Loss Reduction With Permeable Retaining Sleeve for Permanent Magnet Synchronous Machine

Rotor Eddy Current Loss Reduction With Permeable Retaining Sleeve for Permanent Magnet Synchronous Machine

Rotor Design, Analysis and Experimental Validation of a High-Speed Permanent Magnet Synchronous Motor for Electric Turbocharger

Uncontrollable phenomenon and digital control delay analysis for high-speed permanent magnet synchronous motor drive

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