طراحی بهینه قطب موتور سنکرون آهنربای دائم مجهز به چرخ‌دنده مغناطیسی، به‌منظور بهبود توزیع میدان مغناطیسی و کاهش نوسانات گشتاور

نوع مقاله : مقاله پژوهشی

نویسنده

گروه مهندسی قدرت، دانشکده مهندسی برق و کامپیوتر، دانشگاه کاشان، کاشان، ایران

چکیده

در این مقاله ساختار شار محوری ترکیبی موتور سنکرون آهنربای دائم به همراه چرخ‌دنده مغناطیسی به‌منظور افزایش چگالی گشتاور مورد بررسی قرار می­گیرد. موتور دارای دو روتور با آهنرباهای میله­ای با قطبیدگی مماسی و فاقد هسته بوده و مدولاتورها در فواصل هوایی نقش مدولاسیون میدان مغناطیسی را برای استاتور و روتور ایفا می­کنند. شکل در نظر گرفته‌شده برای آهنرباهای دائم امکان ایجاد راندمان زیادتر و در عین حال طول محوری کم­تر را فراهم می­آورد. قطب­های نرم مغناطیسی قرار گرفته در بین آهنرباها، نقش تعیین‌کننده‌ای در توزیع میدان مغناطیسی و نیز پروفیل گشتاور حاصل از ماشین را بر عهده دارند. در این مقاله رخ قطب نرم مغناطیس به‌گونه‌ای اصلاح و بهینه می­گردد تا با استفاده از فاصله هوایی متغیر بتوان توزیع میدان سینوسی­تر و گشتاور خروجی زیادتر و نیز نوسانات گشتاور کم­تر را نسبت به حالت اولیه به‌دست آورد.

کلیدواژه‌ها


عنوان مقاله [English]

Optimal Design of Magnetic Geared PM Synchronous Motor Pole Shape to Improve Magnetic Field Distribution and reduce Cogging Torque

نویسنده [English]

  • Seyed Ahmadreza Afsari Kashani
Faculty of Computer and Electrical Engineering, University of Kashan, Kashan, Iran, P.O. Box 8731753153.
چکیده [English]

In this paper, the combined axial flux structure of a permanent magnet synchronous motor with a magnetic gearbox is investigated to increase the torque density. The motor has two rotors with tangential magnetized spoke type PMs and coreless structure. Modulators play the role of magnetic field modulation for the stator and rotor over the air gaps. The shape of permanent magnets allows higher efficiency and at the same time lower axial length. Soft magnetic poles of the rotor located between the magnets play a decisive role in the magnetic field distribution as well as the torque and magnetic field profile of the machine. In this paper, the shape of the soft magnetic pole is optimized to obtain a higher sine field distribution and higher output torque as well as lower cogging torque using the variable airgap.

کلیدواژه‌ها [English]

  • axial flux PM motor
  • magnetic gear
  • axial flux synchronous motor
  • torque
  • magnetic flux density
  • finite element method
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