Torque Comparison Between Slotless and Slotted Ultra-High-Speed AFPM Motors Using Analytical Method

Cheng, Wenjie; Cao, Guangdong; Deng, Zhikai; Xiao, Longfei; Li, Ming

doi:10.1109/tmag.2021.3081175

Cited by 12 publications

(6 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…2. The To simplify the calculations and improve the analytical efficiency, the factors that have less influence on the central problem are ignored commonly, so the following assumptions are made for the analytical model [16][17][18][19][20][21][22]24,25,27]:…”

Section: Structure and Parametersmentioning

confidence: 99%

“…To simplify the calculations and improve the analytical efficiency, the factors that have less influence on the central problem are ignored commonly, so the following assumptions are made for the analytical model [16–22,24,25,27]: The iron permeability of the stator and rotor is assumed to be infinite, ignoring the saturation effect. It should be noted that the iron saturation is not significant in the PMC‐AFPM machine, which will be presented in Section 5.…”

Section: Equivalent Analytical Modelmentioning

confidence: 99%

“…An exact subdomain model in the Cartesian coordinate is established to analyze the magnetic field distribution and torque performance of the AFPM machine in Ref. [18]. The PM arrangements determine the Fourier expansion of the magnetization intensity of the PM subdomain in the subdomain model.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Equivalent Analytical Model of Magnetic Field in Parallel Magnetic Circuit Axial Flux Permanent Magnet Machines

Xiaoxiao,

Xiaoyuan,

Peng

et al. 2024

IEEJ Transactions Elec Engng

View full text Add to dashboard Cite

The axial flux permanent magnet (AFPM) machines with the parallel magnetic circuit (PMC) rotor can effectively improve its torque density. The PMC rotor consists of two sub‐rotors, radial Halbach array permanent magnet (PM) and tangential PM. The magnetic fields generated by two sub‐rotors are not in the same 2‐D analytical planes. In this paper, an equivalent analytical model of PMC‐AFPM machines is proposed to solve this problem. The radial Halbach array PM rotor is equated to the axial Halbach array PM rotor based on the equivalent transformation principle. The exact subdomain models of equivalent axial Halbach array PM rotor and tangential PM rotor are built respectively and then superimposed to obtain the magnetic field distribution. The electromagnetic characteristics of the PMC‐AFPM machine under no‐load and load conditions are calculated by the proposed analytical model and compared with calculations of the finite element model (FEM). The results verify the accuracy of the equivalent analytical model. The comparative analysis of the AFPM machines with PMC rotor and tangential PM rotor verifies the advantage of PMC rotor configuration to improve the torque density. © 2024 Institute of Electrical Engineer of Japan and Wiley Periodicals LLC.

show abstract

Section: Structure and Parametersmentioning

confidence: 99%

Section: Equivalent Analytical Modelmentioning

confidence: 99%

See 1 more Smart Citation

Equivalent Analytical Model of Magnetic Field in Parallel Magnetic Circuit Axial Flux Permanent Magnet Machines

Xiaoxiao,

Xiaoyuan,

Peng

et al. 2024

IEEJ Transactions Elec Engng

View full text Add to dashboard Cite

show abstract

“…Ref. [16] compared the torque characteristics of slotted and slotless PM motors by using analytical method. Ref.…”

Section: Introductionmentioning

confidence: 99%

Comparative Studies on Performances of Slotted and Slotless High-Speed PMBLDC Motors

Zhao,

He,

et al. 2024

IEEE Access

View full text Add to dashboard Cite

Slotted and slotless stators are two main stator topologies in high-speed permanent magnet brushless direct current (PMBLDC) motors. Both have their own advantages and drawbacks. The electromagnetic loss of slotted and slotless motors have different characteristics in different speed range. Therefore, the comparison of slotted and slotless motors must consider different speed ranges. The performances of slotted and slotless high-speed PMBLDC motors in the full speed range up to 480 krpm are compared in this paper. The no-load and load electromagnetic performances of slotted and slotless motors are studied. The electromagnetic losses of slotted and slotless motors in the full speed range are investigated and compared. Meanwhile, based on the loss calculation results, the thermal characteristics of slotted and slotless motors are studied. The comparison results are summarized considering the electromagnetic, loss and thermal characteristics comprehensively. Finally, a prototype of high-speed PMBLDC motor is manufactured and tested to validate the analysis results.INDEX TERMS high speed, permanent magnet brushless DC (PMBLDC) motor, slotted, slotless, comparison, electromagnetic performance, losses, temperature rise.

show abstract

“…For the interior PM motor, the sub-domain method and the magnetic equivalent circuit method were separately adopted to obtain the flux density distribution of the motor [33,34]. For the axial-flux PM motors, the analytical method could also be adapted to obtain the open-circuit PMs field distribution and the torque ripple [35,36].…”

Section: Introductionmentioning

confidence: 99%

An Analytical Method for Determining Flux Density in Surface-Mounted Permanent Magnet Machines with Unequal Magnetic Poles

Zhai,

Yu,

Shan

et al. 2023

Electronics

View full text Add to dashboard Cite

An analytical method was proposed for obtaining the magnetic field distribution for surface-mounted permanent magnet machines with the structure of unequal magnetic poles. Firstly, the Laplace equation and Poisson equation were solved using the method of the separation of variables, and then the mathematical model of the motor structure with unequal magnetic poles was obtained. Secondly, according to the design parameters of the two types of prototypes motors, the flux density in the air gap region of the two types of prototypes motors was calculated, respectively. Thirdly, by comparing the results calculated using the analytical method with the results obtained using the finite element method, the analytical method proposed in this paper was proven to be effective. Moreover, the armature reaction field and the effect of the stator slotting were considered in the mathematical model as well. Overall, the analytical method presented in this paper provides a theoretical basis for the analytical calculation of motors with the structure of unequal magnetic poles.

show abstract

Torque Comparison Between Slotless and Slotted Ultra-High-Speed AFPM Motors Using Analytical Method

Cited by 12 publications

References 12 publications

Equivalent Analytical Model of Magnetic Field in Parallel Magnetic Circuit Axial Flux Permanent Magnet Machines

Equivalent Analytical Model of Magnetic Field in Parallel Magnetic Circuit Axial Flux Permanent Magnet Machines

Comparative Studies on Performances of Slotted and Slotless High-Speed PMBLDC Motors

An Analytical Method for Determining Flux Density in Surface-Mounted Permanent Magnet Machines with Unequal Magnetic Poles

Contact Info

Product

Resources

About