No-Load Performance of Axial Flux Permanent Magnet Machines Mounting Magnetic Wedges

Donato, Giulio De; Capponi, Fabio Giulii; Caricchi, F.

doi:10.1109/tie.2011.2169638

Cited by 51 publications

(27 citation statements)

References 22 publications

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“…To solve the regional air flow in the turbulent state, turbulence is simulated with the standard k-ε model [19]:…”

Section: Modeling Of Flued Thermal Coupling Analysesmentioning

confidence: 99%

“…The calculation control equations for fluidthermal coupling analysis are shown as [18]: To solve the regional air flow in the turbulent state, turbulence is simulated with the standard k-ε model [19]:…”

Section: Modeling Of Flued Thermal Coupling Analysesmentioning

confidence: 99%

“…Recently, a number of works have been published about permanent magnet synchronous machines (PMSMs) [14][15][16][17][18][19][20][21][22][23]. However, most of these studies are focused on the electromagnetic design and performance analyses, but ignoring the thermal investigation.…”

Section: Introductionmentioning

confidence: 99%

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Research on the Temperature Field of High-Voltage High Power Line Start Permanent Magnet Synchronous Machines with Different Rotor Cage Structure

Cao

et al. 2017

Energies

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For line start permanent magnet synchronous machines (LSPMSMs), the eddy current loss in the rotor, which has of significant effects on rotor working temperature, may cause thermal demagnetization to permanent magnet. Therefore, this paper addresses an investigation on the temperature distribution in LSPMSM based on a 6 kV, 315 kW prototype with solid starting cage bar. Firstly, the loss distributions, obtained from a 2-D transient electromagnetic field calculation, are determined as the distributed heat source in thermal analyses. Then, the fluid-thermal coupled analyses are performed, by which the temperature distributions in the machine are determined. Meanwhile, the calculated motor performance is verified via comparison with the measured results. The calculation results show that the temperatures in the rotor core and permanent magnets are relatively high. To find the solution for reducing the rotor working temperature, a rotor air slot structure was proposed in this analysis. The theoretical calculation indicates that the rotor working temperature reduction is obvious with the rotor air slot in the machine. Therefore, the operating situation of solid rotor LSPMSM could be improved effectively with the proposed rotor thermal solution, which also benefits the machine reliability and safety.

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“…To solve the regional air flow in the turbulent state, turbulence is simulated with the standard k-ε model [19]:…”

Section: Modeling Of Flued Thermal Coupling Analysesmentioning

confidence: 99%

Section: Modeling Of Flued Thermal Coupling Analysesmentioning

confidence: 99%

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Research on the Temperature Field of High-Voltage High Power Line Start Permanent Magnet Synchronous Machines with Different Rotor Cage Structure

Cao

et al. 2017

Energies

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“…As shown in (1), since the frequency of the cogging torque is determined from the lowest common multiple of the numbers of slots and poles, the period of the cogging torque (mechanical angle) can be calculated from (2) [9].…”

Section: Characteristics Of the Two Type Pmsgsmentioning

confidence: 99%

“…The skewed slot type PMSG increases the harmonics after second compared by the open and closed slot type PMSGs. The harmonics increase can be generated the shape of the slot wedge and permeance coefficient difference between the stator core and the slot wedge [9]. However the skewed slot type PMSG decrease the peak to peak value of cogging torque in that the skewed slot wedge also highly decrease fundamental harmonic.…”

Section: Characteristics Of the Three Type Pmsgsmentioning

confidence: 99%

A Novel Skewed-Type Iron Slot Wedge for Permanent Magnet Synchronous Generators for Improving Output Power and Reducing Cogging Torque

Kang¹,

Moon²,

You³

et al. 2015

Journal of Electrical Engineering and Technology

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-This paper proposes a novel skewed-type iron slot wedge that can improve both the cogging torque and the output power of a permanent magnet synchronous generator (PMSG). Generally the open slot structure is adopted in a PMSG due to its convenient winding work, but the high cogging torque is undesired. Firstly, an iron slot wedge was utilized to reduce the cogging torque of an open slot type PMSG. However, the output power of the machine decreased rapidly with this method. Thus, a proposed skewed type iron slot wedge is presented to improve the output power as well as the cogging torque as compared to the open slot type. Shape optimization of the skewed-type iron slot wedge is performed to simultaneously maximize the output power and reduce the cogging torque. The Kriging model based on the Halton sequence method and a genetic algorithm are used to optimize the design.

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Field loss calculation of a wind‐powered axial flux alternator by analytical equations

Otuoze

Mohammed

Ibrahim

et al. 2021

Engineering Reports

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Various techniques have been investigated and proposed for core loss minimization in electrical machines. Nevertheless, many of such methods are mostly complicated and not suitable for consideration at a preliminary design stage. In this work, a simplified procedure which uses an analytical approach to minimizing the field's losses of an Axial Flux Permanent Magnet Alternator (AFPMA), is presented. First, the output equation of an AFPMA is referred, and then the minimization of the losses is investigated by analytical differential equations.The result of the derived-specific magnetic loading is investigated using three different core materials, namely 35RM300, 50JN350, and 65JN800, and is found to reduce with increased frequencies. The 35RM300 core material gives the maximum specific magnetic loading and minimum power loss at investigated frequencies of 50 to 500 Hz. Although the 35RM300 core material gives the best performance, the optimal values are only determined as suitable by the manufacturer's design criteria. This study is a key indicator for a simple and efficient core material selection in the design of a Wind-Powered AFPMA without the need for complicated analyses at the preliminary design stage.

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No-Load Performance of Axial Flux Permanent Magnet Machines Mounting Magnetic Wedges

Cited by 51 publications

References 22 publications

Research on the Temperature Field of High-Voltage High Power Line Start Permanent Magnet Synchronous Machines with Different Rotor Cage Structure

Research on the Temperature Field of High-Voltage High Power Line Start Permanent Magnet Synchronous Machines with Different Rotor Cage Structure

A Novel Skewed-Type Iron Slot Wedge for Permanent Magnet Synchronous Generators for Improving Output Power and Reducing Cogging Torque

Field loss calculation of a wind‐powered axial flux alternator by analytical equations

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