Design optimization for minimizing cogging torque in Axial Flux Permanent Magnet machines

Saygin, Ali

doi:10.1109/optim.2017.7974991

Cited by 11 publications

(6 citation statements)

References 7 publications

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“…Previously, several methods have been proposed and analyzed for reduce the effect of cogging torque [ 16 , 17 , 18 , 19 , 20 , 21 ]. Some studies have suggested an optimal design of axial flux machines to diminish the effect of cogging torque [ 22 , 23 , 24 , 25 ]. Optimal shaping of the rotor poles was proposed by Sikder et al [ 21 ].…”

Section: Introductionmentioning

confidence: 99%

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The Effects of Cogging Torque Reduction in Axial Flux Machines

et al. 2021

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An axial flux permanent magnet single-rotor generator has good potential in various applications that require high efficiency, prolonged service life, as well as low mass and dimensions. However, the effect of cogging torque diminishes generator efficiency and flexibility of functionality. The effect of cogging torque arises because of a small air gap between the stator teeth and the rotor. In this article, we suggest that shifting the opposite teeth of the stator to the optimal angle can reduce the effect of cogging torque. A special axial flux permanent magnet generator is developed to choose the optimal disposition of the permanent magnet and stator teeth in the frame. The impact of the optimal angle on the cogging torque, output power, and generator efficiency is investigated. This analytical study with experimental testing proves that the optimal angle between opposite teeth can significantly decrease cogging torque and improve output power and efficiency. The results show that cogging torque decreases significantly (4–5 times) at an optimal angle of 7.5° as compared with that of other angles, although magnetic flux and output power decline slightly but efficiency increases.

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Section: Introductionmentioning

confidence: 99%

“…Optimal shaping of the rotor poles was proposed by Sikder et al [ 21 ]. Optimization of the air gap between the stator and disc rotor was suggested by Saygin et al [ 22 ]. Design parameters that can have an effect includes geometrical dimensions of teeth, number of teeth, and the angle between teeth [ 23 ].…”

Section: Introductionmentioning

confidence: 99%

The Effects of Cogging Torque Reduction in Axial Flux Machines

et al. 2021

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“…Nevertheless, it is highly complicated and computationally expensive to extract performance indexes, leading to difficult trade-offs. Therefore, it has mainly been applied to the detailed design phase of machines [25][26][27]. Multi-physics models present the electromagnetic, geometrical, and thermal characteristics so that couplings of multi-physics can be evaluated to help assess the More-electric degree of aircraft [13].…”

Section: Introductionmentioning

confidence: 99%

Multi-Level Modeling Methodology for Optimal Design of Electric Machines Based on Multi-Disciplinary Design Optimization

Dai

Wang

Meng³

et al. 2019

Energies

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The transportation sector is undergoing electrification to gain advantages such as lighter weight, improved reliability, and enhanced efficiency. As contributors to the safety of embedded critical functions in electrified systems, better sizing of electric machines in vehicles is required to reduce the cost, volume, and weight. Although the designs of machines are widely investigated, existing studies are mostly complicated and application-specific. To satisfy the multi-level design requirements of power systems, this study aims to develop an efficient modeling method of electric machines with a background of aircraft applications. A variable-speed variable-frequency (VSVF) electrically excited synchronous generator is selected as a case study to illustrate the modular multi-physics modeling process, in which weight and power loss are the major optimization goals. In addition, multi-disciplinary design optimization (MDO) methods are introduced to facilitate the optimal variable selection and simplified model establishment, which can be used for the system-level overall design. Several cases with industrial data are analyzed to demonstrate the effectiveness and superior performance of the modeling method. The results show that the proposed practices provide designers with accurate, fast, and systematic means to develop models for the efficient design of aircraft power systems.

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“…Using active damping control (ADC) and virtual positive impedance method (VPI), increasing the performance of inverter is investigated. Thanks to desired inverter behaviour, the cogging torque of the motor can be decreased [12,13]. A new inverter model is simulated according to the control method.…”

Section: Introductionmentioning

confidence: 99%

Decreasing the Cogging Torque using Virtual Positive Impedance Based Active Damping Control Method for PMSMs

Saygin

2019

International Journal of Computational and Experimental Science and Engineering

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In this paper, active damping control based virtual positive impedance for a PMSM driver is proposed. The proposed model is assumed to achieve the better motor current with a better harmonic response. 6 switches can be employed in the design of the driver to obtain high performance with a simultaneous reduction in the motor current harmonics and thus the torque ripple of PMSM. However, the reduction of input current harmonics is very important to operate the PMSM with less cogging torque. The proposed concept offers a significant decreasing in harmonics. Thus, the effect of VPI on the cogging torque can be understood. The inverter with a Field Oriented Control (FOC) method operates in 3-phase and 20 kHz switching frequency. The PMSM motor is fed by the inverter. The VPI based active damping control for the motor drive is discussed to confirm the performance of the proposed method. The simulation results based on MATLAB are provided to validate the proposed control strategy.

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Design optimization for minimizing cogging torque in Axial Flux Permanent Magnet machines

Cited by 11 publications

References 7 publications

The Effects of Cogging Torque Reduction in Axial Flux Machines

The Effects of Cogging Torque Reduction in Axial Flux Machines

Multi-Level Modeling Methodology for Optimal Design of Electric Machines Based on Multi-Disciplinary Design Optimization

Decreasing the Cogging Torque using Virtual Positive Impedance Based Active Damping Control Method for PMSMs

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