ارائه ساختار جدید گرمایش القایی با کلیدزنی نرم با بازدهی بالا
محورهای موضوعی : مهندسی برق و کامپیوتر
محمدرضا بنائي
1
*
,
سجاد قابلی ثانی
2
,
خلیل منفردی
3
1 - دانشگاه شهید مدنی آذربایجان
2 - دانشگاه شهید مدنی آذربایجان
3 - دانشگاه شهید مدنی آذربایجان
کلید واژه: گرمایش القاییبازدهی بالاکلیدزنی نرمافزایش ولتاژ,
چکیده مقاله :
در اين مقاله، یک ساختار جدید به همراه روش کنترلی، جهت بهبود عملکرد مدارات گرمایش القایی تشدیدی پیشنهاد شده است. در ساختار حاضر با ترکیب عملکرد یک مبدل نیم‌‌پل تشدیدی با قابلیت افزایندگی ولتاژ، کاهش بازدهی در توان‌های پایین و همچنین در توان‌های بالا، تا حد قابل قبولی جبران می‌شود. استفاده از تعداد کلید‌‌ها و دیودهای پایین، استفاده از خازن‌های با کیفیت بالا و ظرفیت پایین، کیفیت مناسب جریان ورودی و همچنین ضریب توان بالا عملکرد مناسب مبدل پیشنهادی را تضمین می‌کند. کلیدزنی کلیدهای فرکانس بالا در ساختار پیشنهادی به صورت کلیدزنی نرم انجام گرفته است و در نتیجه تلفات ناشی از کلیدزنی بسیار پایین است. در این مبدل، طراحی فیلتر ورودی جهت جلوگیری از تأثیرات تداخل الکترومغناطیسی انجام شده است. در نهایت، جهت نمایش عملکرد ساختار پیشنهادی، نتایج شبیه‌سازی و تجربی ارائه شده است.
In this paper, a novel structure and a control method to improve the performance of inductive heating circuits is proposed. In the presented structure, with the combination of the performance of a half-bridge resonant converter with voltage-boost capability, the reduction in output efficiency at low power and at high power is compensated to an acceptable level. The use of the low number of switches and diodes, the use of the high-quality capacitors with low capacities, good quality of the input current and also high power factor ensures the proper operation of the proposed converter. The switching of high frequency switches in the proposed structure is carried out as soft-switching where resulting in very low switching losses. In this converter, the design of the input filter in order to prevent the effects of electromagnetic interference has been prepared. Finally, to demonstrate the proposed structure operation, the simulation and experimental results are presented.
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