ارائه یک روش جدید برای راه‌اندازی لامپ مگنترون با استفاده از مبدل نیم‌پل تغییر فاز یافته

نوع مقاله : مقاله پژوهشی

نویسندگان

1 مربی، دانشگاه شهید مدنی آذربایجان، تبریز، ایران

2 استاد، گروه مهندسی برق، دانشگاه شهید مدنی آذربایجان، تبریز، ایران

3 دانشیار، دانشگاه جامع امام حسین (ع)، تهران، ایران

4 دانشیار، دانشگاه شهید مدنی آذربایجان، تبریز، ایران

چکیده

این مقاله، به طراحی مدولاتور توان برای راه­اندازی لامپ مگنترون پرداخته است. ساختار مدولاتور توان ارائه شده، مبدل نیم­پل، با تشدید سری و کنترل تغییر فاز می­باشد. در این طرح با کنترل تغییر فاز کلیدزنی، شرایط تعادل جریان مغناطیس‌گنندگی برآورده شده و از مقدار حداکثر جریان اشباع هسته کاسته می­شود. در نتیجه تنش جریان کلید­ها کم شده و تلفات کلیدزنی و تلفات هسته کاهش می­یابد. بنابراین حجم، وزن و قیمت هسته­ی ترانسفورماتور قدرت کاهش می­یابد. به‌علاوه با استفاده از اندوکتانس نشتی ترانسفورماتور قدرت، مدار تشدید سری ایجاد نموده و ضمن کاهش تلفات ترانسفورماتور، شرایط کلیدزنی نرم تامین می­شود. مدولاتور توان پیشنهادی، حداکثر و متوسط توان خروجی را در شرایط حداقل تلفات ​​کنترل می­کند. حداکثر توان مورد نیاز W1000 و توان متوسط آن W 250 است که متناسب با زمان فعال بودن مبدل کنترل می­گردد. از دیگر مزایای طرح ارائه شده، می­توان به سادگی مدار قدرت، کاهش تعداد قطعات کلیدزنی، کاهش تلفات کلیدزنی و کاهش اندوکتانس نشتی ترانسفورماتور قدرت اشاره کرد. نتایج طراحی توسط نرم افزار شبیه­ساز PSCAD و تست­های آزمایشگاهی مورد تایید قرار گرفته است.

کلیدواژه‌ها


عنوان مقاله [English]

A New Driving Method for a Magnetron Tube Using Phase-Shifted Half-Bridge Converter

نویسندگان [English]

  • abolfazl Nasiri 1
  • Mohammad Reza Banaei 2
  • seyyed mohammad alavi 3
  • shahram hosseinzadehm 4
1 Instructor, Shahid Madani University of Azerbaijan, Tabriz, Iran
2 Professor, Department of Electrical Engineering, Shahid Madani University of Azerbaijan, Tabriz, Iran
3 Associate Professor, Imam Hossein University, Tehran, Iran
4 Associate Professor, Shahid Madani University of Azerbaijan, Tabriz, Iran
چکیده [English]

This article studies the design of a power modulator for driving a magnetron tube. In this design the
power modulator works with the half-bridge structure, series resonator and phase shift control method.
In this scheme, by controlling the switching phase shift,
the balance condition of magnetization current is
satisfied and the maximum amount of core saturation current is reduced. As a result, the current stress
of switches is reduced and switching and core losses are reduced. So, the size, weight and the cost of the
core of the power transformer will reduce. Also, using leakage inductance of the power transformer, the
series-resonance circuit is provided soft switching condition is guaranteed. Suggested power modulator,
is able to control the peak and average output power with the minimum loss. The maximum power of a
microwave oven is about 1000 w and its average power is 250 W which is controlled proportionally to the
inverter on-state periods. Other advantages to the proposed design are simplicity of the power circuit,
decrease in the number of switching elements, decrease in the switching losses, and decrease in the
leakage inductance of the power transformer. The design results have been verified through simulated of
the
PSCAD software and laboratory tests.

کلیدواژه‌ها [English]

  • Half-Bridge Converte
  • Power Modulator
  • Magnetron tube
  • Phase Shift
  • Series Resonant
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