News

Study of An Improved Biased Flux Intermodular Permanent Magnet Motor

News
A new published paper in IEEE Transactions on Transportation Electrification  Authors: Mohammad Amirkhani; Ehsan Farmahini Farahani; Mojtaba Mirsalim Abstract: This paper proposes an improved biased-flux motor in which the permanent magnets (PMs) are placed between the stator modules, therefore called intermodular PM (IMPM) motor. The proposed structure has increased the torque density while maintaining a low torque ripple. Moreover, due to the specific placement of PMs, the PMs are extensively protected from demagnetization. The operation principle of the proposed IMPM motor is thoroughly discussed using flux modulation theory and is comparatively analysed with other biased-flux structures. Based on this analysis, a new theoretical formulation is also drawn to calculate the power factor, which involves design related parameters. It has been studied that since the PMs are far from armature winding in the…
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2022 George M. Sprowls Thesis Award from MIT EECS presented to Sajjad Mohammadi.

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EMTRL congratulates Dr. Sajjad Mohammadi, the former member of EMTRL, for achieving George M. Sprowls Thesis Award from the department of electrical engineering and computer science of Massachusetts Institute of Technology (MIT EECS) for the Ph.D. thesis entitled:Modeling, Design, Identification, Drive, and Control of a Rotary Actuator with Magnetic Restoration www.eecs.mit.edu/2022-eecs-awards
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Congratulation to Dr. Sajjad Mohammadi

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Dr. Sajjad Mohammadi,EMTRL congratulates you on the defense of your doctoral dissertation, which makes the laboratory members proud that its former member has earned a doctorate from MIT University."His dissertation is available at the following link."
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Recent Article

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A Dual- Stator Machine with Diametrically Magnetized PM: Analytical Air-gap Flux Calculation, Efficiency Optimization and Comparison with Conventional Dual-Stator Machines. . Authors Shahin Asgari, Reza Yazdanpanah, Mojtaba Mirsalim Abstract This paper presents a design and optimization procedure for a dual-stator machine with a diametrically magnetized PM to improve the electromagnetic performance. First, analytical design equations are presented based on MEC analysis; they are used to design a basic dual-stator machine. Then, by applying an artificial intelligence algorithm, the machine is optimized to achieve high efficiency and torque density, and low pulsating torque for direct-drive applications. A quantitative comparison is performed between the optimized new machine and conventional dual-stator machines to evaluate the performances and improvements of the understudy machine. The machine performance, including air-gap flux density distribution, back electromotive force,…
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IEEE Early Access Articles

Papers
Journal Paper Title Authors IEEE Transactions on Industrial Electronics A Novel Dual-Stator Radial-Flux Machine with Diametrically Magnetized Cylindrical Permanent MagnetsShahin Asgari ; Mojtaba Mirsalim IEEE Transactions on Energy Conversion Design Optimization of Double-Sided Permanent-Magnet Axial Eddy-Current Couplers for Use in Dynamic ApplicationsVahid Aberoomand ; Mojtaba Mirsalim ; Rasul Fesharakifard IEEE Transactions on Industrial Informatics A Decentralized Power Management and Sliding Mode Control Strategy for Hybrid AC/DC Microgrids including Renewable Energy ResourcesHamid Reza Baghaee ; Mojtaba Mirsalim ; Gevorg B. Gharehpetian ; Heidar Ali Talebi
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