Calculation for stator loss of high-speed permanent magnet synchronous machine in torque-speed envelope and restraint approach for circulating current in windings

Yu, Yanan; Liang, Deliang; Liang, Zhe; Ze, Qiji

doi:10.30941/cestems.2018.00026

Cited by 17 publications

(6 citation statements)

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“…can obtained by iteratively calculating. According to formula (9), formula (13) and formula (14), the current of each strand can be calculated.…”

Section: A Leakage Inductance Electromotive Force Methodsmentioning

confidence: 99%

“…Previous literatures on the circulating current loss mainly focused on the stator bar of large AC motors or the parallel branches in PMSM. Reference [14], [15] illustrated that circulating current exists in motors with multiple parallel branches. Circulating current loss affects the efficiency and the temperature rise of the stator [16], [17].…”

Section: Introductionmentioning

confidence: 99%

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Analysis on Circulating Current Loss in the Formed Winding of Permanent Magnet Synchronous Motors

et al. 2021

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Permanent magnet synchronous motors with the formed winding can not only improve the slot fill factor and heat dissipation capacity but also effectively reduce the additional loss in the winding. Formed winding permanent magnet synchronous motors will become the future development tendency. Due to inherent features of the formed winding, the circulating current loss is a non-negligible issue. This paper proposes using the formed winding in permanent magnet synchronous motors and analyzes the circulating current loss in the formed winding. First, the finite element models of integer slot and fractional slot motors are established, and the magnetic field analysis are carried out. Then two commonly used methods of calculating circulating current loss are introduced in detail, and their calculation results are compared. Moreover, the high-precision field-circuit coupled finite element method is used to calculate the circulating current loss of integer and fractional motors. And circulating currents of the hairpin winding and the formed winding are compared. The analysis indicates that the circulating current in the formed winding cannot be ignored. Finally, comprehensive and in-depth research on the influencing factors of circulating current loss in the formed winding has been conducted. The results clarify that the number of parallel strands, the width of the slot opening, and the stator current have a considerable influence on the circulating current loss. INDEX TERMSCirculating current loss, field-circuit coupling, permanent magnet synchronous motors, slot-pole combination, the formed winding.

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“…can obtained by iteratively calculating. According to formula (9), formula (13) and formula (14), the current of each strand can be calculated.…”

Section: A Leakage Inductance Electromotive Force Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis on Circulating Current Loss in the Formed Winding of Permanent Magnet Synchronous Motors

et al. 2021

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“…Where R ac is AC per unit length of conductor (Ω), r is the radius of the conductor (m), Bei(x) is Kelvin function, λ Cu is the skin depth of copper conductor, and the calculation formula is shown in (4). 1…”

Section: Copper Loss Analysis Of Stator Windingmentioning

confidence: 99%

Loss Analysis of High-Speed Permanent Magnet Motor for Cordless Vacuum Cleaner

Shao

2023

J. Phys.: Conf. Ser.

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Compared with traditional permanent magnet motors, high-speed permanent magnet motors (HSPMM) have the advantages of fast dynamic response, high efficiency, high reliability, small size, etc. Therefore, HSPMM has been widely used in household and industrial fields, and the research on high-speed permanent magnet motors has become a hot spot in the motor industry. In this paper, the high-speed permanent magnet motor is applied to the cordless vacuum cleaner, and the calculation and analysis of the iron loss and copper loss of the high-speed permanent magnet motor are emphatically studied for the HSPMM used in the cordless vacuum cleaner.

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“…Nevertheless, the situation could be lessened by the use of Halbach magnetization approach, as shown in Xue et al (2019). Besides, it is established in Yu et al (2018) that high operating temperature could adversely affect the loss profile of an electric machine, due to its direct link with the magnetic flux Similarly, the number of stator slots plus the rotor pole number of permanent magnet machine influences its core loss components, as proved in Castagnaro et al (2019). It is also reported that when the supply current is distorted i.e.…”

Section: Introductionmentioning

confidence: 99%

Estimation of losses and efficiency of double-stator switched flux permanent magnet machines

Awah¹,

Okoro²,

Onah³

et al. 2022

Nig. J. Technol. Dev.

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Losses such as rotor iron and stator iron losses, magnet eddy current loss, as well as efficiency of a double stator permanent magnet machine having varying rotor pole numbers is estimated and presented in this study. This current investigation would be vital for electrical machine designers in quantifying the amount of losses in the various sections of a given double stator electric machine and as well provide better insight on resulting output efficiency of the machine. Time-stepping finite element analysis (TS-FEA) procedure is adopted in the calculations using ANSYS-MAXWELL simulation software. The compared machines having the same stator teeth/pole number (Ps) and different rotor pole (Pr) numbers are designated as: 6Ps/10Pr, 6Ps/11Pr, 6Ps/13Pr and 6Ps/14Pr. The predicted total loss values at rated current and operating base speed is 13.02 Watts, 13.13 Watts, 13.539 Watts, 13.537 Watts, from the 6Ps/10Pr, 6Ps/11Pr, 6Ps/13Pr and 6Ps/14Pr machine types, respectively. The corresponding efficiency of the machine types at rated working conditions is: 81.76%, 88.17%, 86.95% and 78.61%, respectively. The results show that magnitude of losses in a given machine would largely depend upon factors such as number of rotor poles and hence, the machine’s operating speed, electric loading and angular rotor position of the machine, etc. It is also found that the number of loss waveform cycles (Nc) in an electric revolution of the investigated machine would depend upon its stator and rotor arrangements. The most performing compared machine types are the ones that have 11- and 13-rotor pole numbers, while the least amount of efficiency is obtained from the machine type that has 14-rotor pole number. Above all, the 6Ps/10Pr and 6Ps/14Pr are characterized with high amount of pulsations or ripples and this is detrimental to the overall performance of the machines.

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Calculation for stator loss of high-speed permanent magnet synchronous machine in torque-speed envelope and restraint approach for circulating current in windings

Cited by 17 publications

References 0 publications

Analysis on Circulating Current Loss in the Formed Winding of Permanent Magnet Synchronous Motors

Analysis on Circulating Current Loss in the Formed Winding of Permanent Magnet Synchronous Motors

Loss Analysis of High-Speed Permanent Magnet Motor for Cordless Vacuum Cleaner

Estimation of losses and efficiency of double-stator switched flux permanent magnet machines

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