Rotor Design and Eddy-Current Loss Suppression for High-Speed Machines With a Solid-PM Rotor

Fang, Haiyang; Li, Dawei; Qu, Ronghai; Li, Jian; Wang, Cong; Song, Bao

doi:10.1109/tia.2018.2871095

Cited by 59 publications

(17 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is well-known that significant rotor losses are normally generated inside PM machines, especially at high speed operations [22][23] . Fig.…”

Section: Analysis Of Rotor Losses 21 Rotor Losses Of Pm Machine Withmentioning

confidence: 99%

Sleeve design of permanent-magnet machine for low rotor losses

Zheng

Zhao

et al. 2020

Chin. J. Electr. Eng.

View full text Add to dashboard Cite

“…It is well-known that significant rotor losses are normally generated inside PM machines, especially at high speed operations [22][23] . Fig.…”

Section: Analysis Of Rotor Losses 21 Rotor Losses Of Pm Machine Withmentioning

confidence: 99%

Sleeve design of permanent-magnet machine for low rotor losses

Zheng

Zhao

et al. 2020

Chin. J. Electr. Eng.

View full text Add to dashboard Cite

“…Permeance harmonics, the spatial harmonics of magnetomotive force (MMF) and harmonics due to nonsinusoidal current induce the eddy current in conductive rotor parts, and thus produce ohmic loss [15], [16]. To reduce current waveform distortion, high switching frequency SiC inverter equipped with output filters is developed for this application.…”

Section: Rotor Eddy Current Loss Reductionmentioning

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

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.

show abstract

“…The results show that the time harmonics have a significant effect on the PM eddy current loss. In [15], [16], time-stepping FEM is used to simulate the inverter power supply for the high-speed PMSM and PM eddy current loss is evaluated based on FEM. However, the core saturation effect and leakage inductance at the winding end are ignored.…”

Section: Introductionmentioning

confidence: 99%

Loss Calculation and Thermal Analysis for High-Speed Permanent Magnet Synchronous Machines

et al. 2020

View full text Add to dashboard Cite

The small size of high-speed permanent magnet synchronous machines (PMSMs) makes the increase of loss density and the difficulty of heat dissipation. PMSMs are sensitive to temperature, especially the permanent magnet (PM), which is likely to suffer irreversible demagnetization due to the excessively high temperature. This paper investigates the loss and thermal analysis of high-speed PMSMs with amorphous alloy stator core and interior permanent magnet (IPM) rotor. First, the trajectory of magnetic flux density in typical parts of high-speed PMSM with sinusoidal and pulsewidth modulation (PWM) inverter power supply is analyzed. The core loss characteristics based on the proposed field-circuit coupled method is obtained. Then, an electromagnetic-thermal iteration calculation method is proposed to analyze the temperature distribution. The effect of different parameters on thermal behavior is investigated, which provide references for the suppression of temperature rise. Finally, the theoretical analysis is verified through the experiments based on a high-speed PMSM prototype.INDEX TERMS High-speed permanent magnet synchronous machine, magnetic field, loss distribution, temperature distribution.

show abstract

Rotor Design and Eddy-Current Loss Suppression for High-Speed Machines With a Solid-PM Rotor

Cited by 59 publications

References 17 publications

Sleeve design of permanent-magnet machine for low rotor losses

Sleeve design of permanent-magnet machine for low rotor losses

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

Loss Calculation and Thermal Analysis for High-Speed Permanent Magnet Synchronous Machines

Contact Info

Product

Resources

About