Mechanical Design of Rotors with Surface Mounted Permanent Magnets

Barrans, Simon; Mallin, Levi

doi:10.5772/intechopen.78854

Cited by 3 publications

(2 citation statements)

References 16 publications

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“…To offset the rotating centrifugal force at high speed, the rotor permanent magnet protection sleeve is adopted, of which there are mainly two types: carbon fiber sleeve and alloy sleeve. Carbon fiber sleeves have less thickness and produce lower eddy current losses than alloy sleeves, but their poor thermal conductivity is not conducive to the rotor's heat dissipation [22][23][24]. For UHSPMMs, the circumferential speed is normally less than 250 m/s, and the space of the rotor is limited; therefore, the structure of solid PM and alloy sleeve is selected for the designed electric motor.…”

Section: Uhspmm Design and Specificationsmentioning

confidence: 99%

Design and Calculation of Multi-Physical Field of Ultra-High-Speed Permanent Magnet Motor

Cheng,

Li,

et al. 2024

Energies

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Ultra-high-speed permanent magnet motors (UHSPPMs) are gradually increasing in the number of scenarios to realize energy saving and emission reduction due to their advantages such as high power density and fast response speed, and their accurate design and analysis are becoming more and more important. UHSPMMs need to consider the effects of multiple physical fields such as electromagnetism, force, and heat on their performance and structure due to their high rotational speed and small size. In this paper, firstly, the loss of each component of the motor is accurately calculated, and the distribution of the flow field and temperature field inside the motor is obtained by computational fluid dynamics (CFD) to determine the limiting working conditions of each component of the motor. Secondly, the mechanical stresses of the rotor are calculated at different limiting working conditions, especially the checking of the stresses of the permanent magnets and the sleeves when they are working at different temperature gradients, in order to improve the reliability of the ultra-high-speed rotor. Furthermore, the dynamics analysis is performed for the whole rotor system to ensure stable operation for a long time at the rated working conditions. Finally, the dynamics of the whole rotor system is analyzed to ensure that the ultra-high-speed permanent magnet rotor can operate stably for a long period of time at the rated operating conditions. Based on the theoretical calculations and analyses, a 25 kW, 95 krpm prototype was designed and fabricated, and relevant experimental studies were carried out. The correctness of the calculation of rotor mechanical properties under extreme working conditions (extreme speed and extreme temperature) is verified through tests, which achieved the target of design accuracy within 5%, and can provide great help to further improve the high-precision design of UHSPMMs.

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Section: Uhspmm Design and Specificationsmentioning

confidence: 99%

Design and Calculation of Multi-Physical Field of Ultra-High-Speed Permanent Magnet Motor

Cheng,

Li,

et al. 2024

Energies

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“…Nagaoka, Takemoto, and Ogasawara [13] developed a 2D finite element analysis (FEA) model for surface-mounted inner rotor motors and studied the effects of gaps between the magnets. Barrans et al [14] and Schubert and Sarlioglu [15] developed FEA models to study the effect of stresses in SPMs on inner rotor motors.…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Vibration Analysis of a High-Speed Outer Rotor Electric Motor

Barua,

Lin,

Rallabandi

et al. 2024

IEEE Access

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has been authored by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the US Department of Energy (DOE). The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan). VOLUME XX, 2017 1Date of publication xxxx 00, 0000, date of current version xxxx 00, 0000.

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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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Mechanical Design of Rotors with Surface Mounted Permanent Magnets

Cited by 3 publications

References 16 publications

Design and Calculation of Multi-Physical Field of Ultra-High-Speed Permanent Magnet Motor

Design and Calculation of Multi-Physical Field of Ultra-High-Speed Permanent Magnet Motor

Mechanical and Vibration Analysis of a High-Speed Outer Rotor Electric Motor

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

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