کاهش گشتاور ریپل در موتور مغناطیس دایم بدون جاروبک با استفاده از طراحی بهینه ساختار موتور
محورهای موضوعی : مهندسی برق و کامپیوترمحمدرضا عليزاده پهلواني 1 , یوسف شهبازی آیت 2 * , ابوالفضل واحدی 3
1 - دانشگاه مالک اشتر
2 - دانشگاه صنعتی مالک اشتر
3 - دانشگاه علم و صنعت ايران
کلید واژه: موتور BLDC موتور AFPM گشتاور الکترومغناطیسی گشتاور ریپل,
چکیده مقاله :
در این مقاله محاسبه گشتاور الکترومغناطیسی لحظه‌ای در موتور مغناطیس دایم شارمحوری بدون جاروبک با استفاده از تئوری نیروی لورنتز انجام شده است. در این روش از ولتاژ ضدمحرکه و جریان فازها استفاده گردیده و یک روش جدید برای محاسبه هارمونیک‌های مختلف ولتاژ ضدمحرکه با استفاده از روش تحلیلی ارائه شده است. نتایج ناشی از روش تحلیلی ارائه‌شده با استفاده از نرم‌افزار المان محدود مورد ارزیابی قرار گرفته و تطابق خوبی میان روش تحلیلی ارائه‌شده و روش المان محدود وجود دارد. زمان محاسبات در روش تحلیلی ارائه‌شده بسیار کمتر از زمان محاسبات نرم‌افزار المان محدود می‌باشد. در نهایت با استفاده از روش تحلیلی، برخی پارامترهای هندسی موتور با هدف کاهش گشتاور ریپل بهینه‌سازی شده‌اند.
In this paper instantaneous electromagnetic torque computation is done for axial flux permanent-magnet brushless DC (BLDC) motor using Lorentz force theorem. In this method, back electro motive force (EMF) and currents of phases should be defined. A novel method is presented for calculation of back EMF harmonics using analytical method (AM). The analytical results are compared with results obtained from the finite element method (FEM). A good agreement is between AM and FEM. Computational time in AM is much less than FEM. Finally, for torque ripple reduction, some motor geometric parameters are optimized using AM.
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