کنترل تحملپذیر خطا و کاهش ریپل گشتاور در درایو ماژولار موتور سنکرون آهنربای دائم سهفاز غیرسینوسی
محورهای موضوعی : مهندسی برق و کامپیوتر
مهدی جعفری سجزه
1
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ابوالفضل حلوایی نیاسر
2
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1 - گروه قدرت، دانشکده مهندسي برق و کامپیوتر، دانشگاه كاشان، كاشان، ايران
2 - گروه قدرت، دانشکده مهندسي برق و کامپیوتر، دانشگاه كاشان، كاشان، ايران
کلید واژه: ریپل گشتاور, موتور PMSM سهفاز با اتصال انتها باز, قابلیت اطمینان, اینورتر پل H, کنترل تحملپذیر خطا.,
چکیده مقاله :
موتورهای سنکرون آهنربای دائم (PMSM)، با توجه به ویژگیهای ممتازی همچون چگالی گشتاور و بهره زیاد، و قابلیت اطمینان بالا، امروزه جایگاه ویژهای در بسیاری از کاربردهای صنعتی، و کاربردهای تولید انبوه پیدا کردهاند. به منظور افزایش بیشتر قابلیت اطمینان محرکه PMSM از ساختار سیمپیچی انتها باز برای موتور استفاده میشود که در آن هر سیمپیچ از یک اینورتر تکفاز تغذیه میگردد. در برخی کاربردها، جهت افزایش حداکثری قابلیت اطمینان و ماژولار نمودن کامل محرکه، از میکروکنترلكنندههای مجزا برای کنترل هر اینورتر تکفاز بهره گرفته میشود. استفاده از این ساختار ماژولار، سبب میشود که نتوان از روشهای مدلسازی و کنترل متداول موتورهای PMSM سهفاز در دستگاههای دومحوری، بهره گرفت و در این راستا و در این تحقیق از روش مدلسازی و کنترل مستقل هر فاز موتور در دستگاه مختصات سهمحوری ساکن استفاده میشود. همچنین در شرایط وقوع خطا و از دست رفتن یک فاز، از یک روش کنترل تحملپذیر خطا استفاده میشود تا ضمن استفاده از حداکثر قابلیت تولید گشتاور توسط فازهای سالم، ریپل ناشی از هارمونیک دوم گشتاور حداقل گردد. درستی تحلیلها و روش کنترلی ارائه شده در نرمافزار سیمولینک با شبیهسازی اثبات میگردند و بهمنظور صحهگذاری تئوریهای ارائه شده ونتایج شبیهسازی، نتایج چند تست آزمایشگاهی در شرایط وجود خطا نیز ارائه میشوند.
Permanent Magnet Synchronous Motors (PMSMs), due to their outstanding features such as high torque density and efficiency, as well as high reliability, have now secured a special position in many industrial applications and mass production applications. In order to further enhance the reliability of PMSM drives, an open-end winding structure is used for the motor, where each winding is supplied by a single-phase inverter. In some applications, to maximize reliability and achieve complete modularity of the drive, separate microcontrollers are employed to control each single-phase inverter. The use of this modular structure makes it impossible to utilize common modeling and control methods of three-phase PMSMs in two-axis reference frames. Therefore, in this research, a method of independent modeling and control of each motor phase in a stationary three-axis coordinate system is used. Moreover, under fault conditions and the loss of one phase, a fault-tolerant control method is employed to maximize torque production capability by the healthy phases while minimizing torque ripple caused by the second harmonic. The validity of the presented analyses and control method is proven through simulation in Simulink software. Additionally, to verify the presented theories and simulation results, the results of several experimental tests under fault conditions are provided.
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