3-D Eddy Current and Fringing-Flux Distribution in an Axial-Flux Permanent-Magnet Synchronous Machine With Stator in Laminated Iron or SMC

Scheerlinck, Bart; Gersem, Herbert De; Sergeant, Peter

doi:10.1109/tmag.2015.2443555

Cited by 22 publications

(9 citation statements)

References 10 publications

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“…Figure 17 shows the eddy current distribution in the segmented top lamination of figure 16 (lamination number 1). Figure 18 shows the instantaneous iron losses for three seg- Knowing that the amount of fringing flux losses count for 34% of the total iron losses (see [17] under the same conditions), this gives a reduction of almost 6% in total iron losses.…”

Section: A Fringing Flux Losses With Segmented Top and Bottom Laminamentioning

confidence: 92%

Reducing Losses Due to Fringing Flux in an Axial-Flux Permanent-Magnet Synchronous Machine

2016

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This paper deals with iron losses caused by fringing fluxes generated by the concentrated stator windings of an Axial Flux Permanent Magnet Synchronous Machine (AFPMSM). Fringing fluxes enter the laminated stator stack perpendicularly to the plane of the Laminated Silicon Steel Sheets (LSSS). They cause additional eddy currents and losses in the sheets. Three approaches for reducing these losses are compared experimentally with a dedicated set-up. The set-up has no moving parts and makes accurate iron loss measurement possible. The first method directly restricts the eddy-current losses by segmenting the lamination surface. The second method deflects the fringing flux by using Soft Magnetic Composite (SMC). The third method magnetically short-circuits the fringing flux using ferromagnetic wires. The first method gives the best results, with a reduction of six percent of the total iron loss at an induction level of 0.6T and a frequency of 200Hz.

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Section: A Fringing Flux Losses With Segmented Top and Bottom Laminamentioning

confidence: 92%

Reducing Losses Due to Fringing Flux in an Axial-Flux Permanent-Magnet Synchronous Machine

2016

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“…The key aspect of motor design is electromagnetic performance design. The most commonly used methods include the size equation [11,31,36,37], finite element analysis (FEA) [31,38,39], equivalent magnetic circuit [40,41], and analytical calculation methods [42,43]. The improvements in motor-design methods are essential for motor optimization, and many studies have focused on broader prospects of optimization.…”

Section: Design and Optimization Of An Afpmsm With An Iron Corementioning

confidence: 99%

“…Soft-magnetic materials are the primary materials used in motors. They are ideal substitutes for steel cores because of their low eddy-current and hysteresis losses and are widely used nowadays [39,52]. The most commonly used soft magnetic materials are soft-magnetic alloys, soft-magnetic composites (SMCs), and amorphous metals (AMMs).…”

Section: Materials Optimizationmentioning

confidence: 99%

Review of Design and Control Optimization of Axial Flux PMSM in Renewable-energy Applications

Zhao

Wang

et al. 2023

Chin. J. Mech. Eng.

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Axial flux permanent magnet synchronous motors (AFPMSMs) have been widely used in wind-power generation, electric vehicles, aircraft, and other renewable-energy applications owing to their high power density, operating efficiency, and integrability. To facilitate comprehensive research on AFPMSM, this article reviews the developments in the research on the design and control optimization of AFPMSMs. First, the basic topologies of AFPMSMs are introduced and classified. Second, the key points of the design optimization of core and coreless AFPMSMs are summarized from the aspects of parameter design, structure design, and material optimization. Third, because efficiency improvement is an issue that needs to be addressed when AFPMSMs are applied to electric or other vehicles, the development status of efficiency-optimization control strategies is reviewed. Moreover, control strategies proposed to suppress torque ripple caused by the small inductance of disc coreless permanent magnet synchronous motors (DCPMSMs) are summarized. An overview of the rotor-synchronization control strategies for disc contra-rotating permanent magnet synchronous motors (CRPMSMs) is presented. Finally, the current difficulties and development trends revealed in this review are discussed.

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“…Compared with silicon sheets, the SMC has the advantages of low eddy current loss and magnetic isotropic characteristic [8]- [9], while its disadvantages include low permeability, low mechanical strength and even high cost of raw material due to the production scale of SMC powder is very small currently [10]. In the design of electrical machine with SMC cores, some design guidelines were suggested to be followed, e.g., PM excitation, 3D magnetic flux structure, and high operation frequency.…”

Section: Introductionmentioning

confidence: 99%

Design and Performance Analysis of Permanent Magnet Claw Pole Machine with Hybrid Cores

Liu

Chao

Wang

et al. 2023

Trans. Electr. Mach. Syst.

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Permanent magnet claw pole machine (PMCPM) is a special kind of transverse flux permanent magnet machine. Compared with other electrical machines, it has the advantages of high torque density and high efficiency for high speed operation. However, because of its complex irregular structure, the manufacturing process using silicon sheets is complicated. Soft magnetic composite material (SMC) is manufactured by powder metallurgy technology, which can produce various shapes of stator core structures, so it is easier to produce various irregular shapes of the stator core. However, the raw SMC material is relatively expensive, and the mechanical strength of SMC is weak. In this paper, a PMCPM with hybrid cores is proposed. With the adoption of hybrid silicon sheet -SMC cores and amorphous alloy -SMC cores, the torque ability of PMCPM can be improved greatly and it can have higher efficiency for more wide operation frequency. Meanwhile, its mechanical strength has been improved and it can be designed for high torque direct drive applications as it is a modular machine. Furthermore, three methods are proposed to reduce the additional eddy current loss which resulted from the employment of hybrid cores in PMCPM.

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3-D Eddy Current and Fringing-Flux Distribution in an Axial-Flux Permanent-Magnet Synchronous Machine With Stator in Laminated Iron or SMC

Cited by 22 publications

References 10 publications

Reducing Losses Due to Fringing Flux in an Axial-Flux Permanent-Magnet Synchronous Machine

Reducing Losses Due to Fringing Flux in an Axial-Flux Permanent-Magnet Synchronous Machine

Review of Design and Control Optimization of Axial Flux PMSM in Renewable-energy Applications

Design and Performance Analysis of Permanent Magnet Claw Pole Machine with Hybrid Cores

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