ارزیابی و مقایسه روش‌های تخمین بازده موتورهای سه‌فاز القائی در حین کار

نوع مقاله : مقاله پژوهشی

نویسندگان

1 نویسنده مسئول: استادیار، دانشگاه شهید بهشتی، تهران، ایران

2 دانشجوی دکتری، دانشگاه شهید بهشتی، تهران، ایران

چکیده

روش‌های استاندارد برای اندازه‌گیری بازده موتورهای الکتریکی به دو روش مستقیم و غیر مستقیم تقسیم می‌شود. تامین شرایط و تجهیزات مورد نیاز این روش‌ها برای اندازه‌گیری بازده موتورهای الکتریکی در حین کار، معمولا به سهولت میسر نیست. در این شرایط، برای اندازه‌گیری بازده موتورهای سه فاز القایی، از روش‌های تخمین برخط بازده این موتورها می‌توان استفاده نمود. به این صورت که با استفاده از اندازه‌گیری متغیرهای الکتریکی، شامل جریان، ولتاژ، توان و ضریب توان موتور، توان خروجی موتور تخمین زده می‌شود. روش‌های تخمین برخط بازده موتورهای سه فاز القایی به چهار دسته روش لغزش، روش جریان، روش مدار معادل الکتریکی و روش تخمین گشتاور فاصله هوایی تقسیم می‌شود. در این بین، دو روش مدار معادل الکتریکی و تخمین گشتاور فاصله هوایی، دقت مناسبی برای محاسبه بازده موتورهای سه فاز القایی دارند. در این مقاله، مطالعات قبلی انجام شده برای تخمین بازده موتورهای سه فاز القایی در حین کار، با استفاده از دو روش مدار معادل الکتریکی و تخمین گشتاور فاصله هوایی، مرور می‌شود.

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