Electromagnetic performance analysis of PMSM with eccentric consequent pole rotor

Li, F.; Wang, K.; Li, J.; Sun, Haiyang; Luk, P.C.K.

doi:10.1109/pesa.2017.8277734

Cited by 13 publications

(5 citation statements)

References 16 publications

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“…Figure 16 shows the curves of f I CP , f II CP , f a = f I CP + f II CP and f with the setting of L 1 = 2τ, S 1 = 3τ. The simulation results are basically consistent with (11). In summary, through the first two-segment design, the end force waveform has achieved odd symmetry in the first half and the second half cycle.…”

Section: Second Two-segment Design To Adjust the Period To τsupporting

confidence: 82%

“…The displacement can be divided into two intervals in each cycle. Ideally, FI CP1n = FII CP1n = F CP1n , FI CP2n = FII CP2n = F CP2n , so Equation ( 10) can be expressed further as Equation (11).…”

Section: Second Two-segment Design To Adjust the Period To τmentioning

confidence: 99%

“…IP and PM are alternately arranged for excitation. This structure has been applied to both rotary motor [2][3][4][5][6][7][8][9][10][11][12][13] and linear motor [14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

“…In order to overcome these shortcomings, slot/pole combination [7,8], multilayer windings or equal-pole-arc magnetic pole [9], and asymmetric magnetic pole structure [10] can be used to reduce or eliminate even-numbered back-EMF harmonics. The torque or thrust ripple can be suppressed by modular structure, eccentric shape PMs, skewed poles, and non-uniform air gap [11]. In [12], in order to improve the unbalanced magnetic flux, the improved CP structure of "N-S-IP-S-N-IP" is employed.…”

Section: Introductionmentioning

confidence: 99%

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Research on Segmented Primary Consequent-Pole Permanent Magnet Linear Synchronous Motor with Symmetric and Periodic End Force

Huang

Zhang

et al. 2021

Symmetry

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The end force of North-South permanent magnet linear synchronous motor (NS-PMLSM) fluctuates symmetrically with a period of one pole. Different from it, the end force’s fluctuation cycle of the consequent-pole permanent magnet linear synchronous motor (CP-PMLSM) is usually two poles and asymmetrical. Especially, within two half cycles, the end force presents complex asymmetric characteristics. In this paper, a piecewise function model of the end force of CP-PMLSM is established. Then a primary segmented design method for adjusting the period, symmetry and phase of the end force waveform is proposed. The two-segment and grouped four-segment modular distances are combined and matched to eliminate the odd-numbered harmonics of the end force and suppress the thrust ripple. A slotless primary core experimental platform and a slotted CP-PMLSM prototype are manufactured and tested to verify the theoretical analysis and simulation results.

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Section: Second Two-segment Design To Adjust the Period To τsupporting

confidence: 82%

Section: Second Two-segment Design To Adjust the Period To τmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Research on Segmented Primary Consequent-Pole Permanent Magnet Linear Synchronous Motor with Symmetric and Periodic End Force

Huang

Zhang

et al. 2021

Symmetry

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show abstract

“…Traditionally, eccentric permanent magnets (PM) have been identified as an attractive approach for reducing the torque ripple and electromagnetic vibration in machines. An eccentric PM was designed to reduce torque ripple [10][11] , and the torque ripple and vibration performance were simultaneously improved [12] . Low-and medium-frequency vibrations were reduced using eccentric PMs and dummy slots [13] .…”

mentioning

confidence: 99%

Vibration Reduction and Torque Improvement of Integral-slot SPM Machines Using PM Harmonic Injection

Ji,

Liu,

Zeng

et al. 2023

Chin. J. Electr. Eng.

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This study aimed to improve the vibration and torque of an integral-slot surface-mounted permanent magnet (SPM) machine by optimizing the shape of the harmonically injected permanent magnet (PM). First, the effect of the third harmonic injected into the sinusoidal PM shape on the electromagnetic performance of a 36-slot/12-pole SPM machine was investigated, including the torque performance and vibration response. It was found that the Sin+3rd harmonic-shaped PM had a contrary effect on the torque and vibration performance of the integral-slot machine, which improved the torque capability but worsened the vibration performance.Second, the response surface model and Barebones multi-objective particle swarm optimization algorithm based on a trade-off between the average torque and vibration were implemented to determine the optimal harmonic injection. Subsequently, the performances of the optimal Sin+3rd-shaped and eccentric PM machines were compared, showing the excellent torque and vibration performance of the adopted method. Finally, a prototype was manufactured and tested to verify the results of the theoretical analysis.

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Influence of Various Magnetic Pole on Electromagnetic Performance of Consequent-Pole Permanent Magnet Machine

Wang

Sun

et al. 2019

IEEE Access

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Permanent magnet (PM) machine with consequent pole (CP) rotor can improve the PM utilization ratio. However, one group PMs with the same polarity is replaced by iron core which deteriorating the electromagnetic performance of the machine, including even-order back-EMF harmonics, torque ripple, as well as unipolar leakage flux. Therefore, CP PM machine with various magnetic pole, i.e., equal pole-arc magnetic pole (EMP) and asymmetric magnetic pole (AMP) structure is proposed, with smaller torque ripple can be achieved, without deteriorating the torque ability compared with the conventional CP PM machine. Further, the influence of various CP PM magnetic pole on the end leakage flux is analyzed by three-dimensional (3-D) finite element (FE), which includes leakage flux distributions as well as magnetization of shaft. The electromagnetic characteristics of the machine with EMP and AMP rotor are compared with traditional surface-mounted and CP PM machines by FE analysis. It is demonstrated that EMP and AMP rotor structure can reduce even-order harmonics, torque ripple and end leakage flux for the machines. Finally, one prototype with CP AMP rotor is tested to confirm the theoretical and FE analysis, which includes suppression effect of even back-EMF harmonics, torque characteristics as well as leakage flux at the end shaft. INDEX TERMS AMP, CP rotor, EMP, even-order back-EMF harmonic, PM machine, torque ripple, unipolar leakage flux.

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Electromagnetic performance analysis of PMSM with eccentric consequent pole rotor

Cited by 13 publications

References 16 publications

Research on Segmented Primary Consequent-Pole Permanent Magnet Linear Synchronous Motor with Symmetric and Periodic End Force

Research on Segmented Primary Consequent-Pole Permanent Magnet Linear Synchronous Motor with Symmetric and Periodic End Force

Vibration Reduction and Torque Improvement of Integral-slot SPM Machines Using PM Harmonic Injection

Influence of Various Magnetic Pole on Electromagnetic Performance of Consequent-Pole Permanent Magnet Machine

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