اینورتر ۱۷ سطحی توسعه‌پذیر با بهرۀ ولتاژ هشت‌برابری، ولتاژ مسدودکنندگی کم، تعداد کلید کاهش‌یافته و قابلیت شارژ نرم

نوع مقاله : مقاله پژوهشی

نویسندگان

1 کارشناسی ‌ارشد مهندسی برق قدرت‌، دانشگاه محقق اردبیلی، اردبیل، ایران

2 دانشیار گروه مهندسی برق، دانشگاه محقق اردبیلی‌، اردبیل‌، ایران

3 دکتری مهندسی برق قدرت، دانشگاه محقق اردبیلی‌، اردبیل، ‌ایران‌

4 کارشناسی‌ ارشد مهندسی برق قدرت‌، دانشگاه محقق اردبیلی، اردبیل، ایران

10.22059/ses.2026.411082.1215

چکیده

در این مقاله، یک اینورتر ۱۷سطحی مبتنی بر کلیدزنی خازنی با قابلیت افزایندگی هشت‌برابری ولتاژ ارائه شده است. ساختار پیشنهادی شامل ۱۰ کلید، ۵ دیود و ۵ خازن است و کاهش تعداد کلیدها به کاهش تعداد درایورها، ساده‌سازی راهبرد کنترلی و کاهش تعداد سینک‌های حرارتی مورد نیاز منجر می‌شود. در این ساختار، تنها پنج سیگنال کنترلی منفرد برای هدایت پنج جفت کلید کافی است. طراحی مدار به‌ گونه‌ای انجام شده است که با استفاده از توالی شارژ مناسب و به‌کارگیری یک سلف کوچک در مسیر مشترک شارژ خازن‌ها، جریان هجومی به ‌طور مؤثر محدود شده و فرایند شارژ خازن‌ها بدون نیاز به دیود بای‌پس سلف، سلف‌های متعدد یا واحدهای کمکی خارجی، به‌ صورت نرم انجام می‌شود. این ویژگی‌ها علاوه بر کاهش تنش‌های ولتاژ و جریان در ادوات قدرت، موجب افزایش عمر مفید آن‌ها و کاهش هزینۀ کلی سیستم می‌شود. ساختار پیشنهادی نیازی به خازن‌های پیش‌شارژ ندارد و تعادل ولتاژ بین خازن‌ها به ‌صورت خودکار و سریع برقرار می‌شود. همچنین، ولتاژ مسدودکنندگی کل ساختار (TSV) برابر با 5.8Vmax بوده که بیانگر نیاز به تجهیزات قدرت با سطح ولتاژ نامی پایین‌تر است، به ‌طوری ‌که تنها دو تجهیز حداکثر ولتاژ خروجی را تحمل می‌کنند. در ادامه، اصول عملکرد مدار، تعیین ظرفیت خازن‌ها، تحلیل شارژ نرم و محاسبات تلفات ارائه شده و مقایسه‌ای جامع با ساختارهای مشابه از نظر بهرۀ ولتاژ، تعداد اجزا‌، تنش ولتاژ و جریان هجومی انجام شده است. در نهایت، شبیه‌سازی در محیط MATLAB/Simulink با توان نامی ۵۳۰ وات و نتایج آزمایشگاهی مانا و پویا، صحت عملکرد و قابلیت کاربرد ساختار پیشنهادی را در شرایط مختلف بار و اندیس مدولاسیون تأیید می‌کنند.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

A Scalable Single-Source 17-Level Inverter with Eightfold Voltage Gain, Low TSV, Reduced Switch Count, and Soft-Charging Capability

نویسندگان [English]

  • Hossein Mansourizadeh 1
  • Majid Hoseinpour 2
  • Ali Seifi 3
  • Ebrahim Tavassoli 4
1 M.Sc., Department of Electrical Engineering, University of Mohaghegh Ardabili, Ardabil, Iran
2 Associate Professor, Department of Electrical Engineering, University of Mohaghegh Ardabili, Ardabil, Iran
3 Ph.D., Department of Electrical Engineering, University of Mohaghegh Ardabili, Ardabil, Iran
4 M.Sc., Department of Electrical Engineering, University of Mohaghegh Ardabili, Ardabil, Iran
چکیده [English]

This paper proposes a 17-level switched-capacitor inverter with an eightfold voltage boosting capability and a soft-charging mechanism. A key challenge in existing 17-level structures is achieving high voltage gain, low device count, low voltage stress, and inrush current limitation at the same time. The proposed topology employs 10 switches, 5 diodes, and 5 capacitors, reducing the number of gate drivers and control complexity while minimising required heat sinks. Only five independent control signals are needed to drive five switch pairs. The main novelty is a single-source 17-level inverter with eightfold voltage gain and soft charging using only one small shared inductor.  By using an appropriate charging sequence and a small inductor in the common capacitor-charging path, the inrush current is effectively limited, and the capacitor-charging process becomes soft without requiring an inductor bypass diode, multiple inductors, or auxiliary external units. These features reduce voltage and current stresses on components, improve reliability, and decrease overall system cost. The proposed inverter does not require pre-charged capacitors, and capacitor voltage balancing is achieved automatically and rapidly. The topology is designed so that the total standing voltage (TSV) is limited to 5.8Vmax, indicating reduced device voltage ratings; moreover, only two components withstand the maximum output voltage. Operating principles, capacitor sizing, soft-charging analysis, and loss calculations are presented, along with a comprehensive comparison with similar structures for voltage gain, component count, voltage stress, and inrush current. Simulation (MATLAB/Simulink) at 530 W, and both steady-state and dynamic experimental tests, validate the effectiveness of the proposed inverter under different load conditions and modulation indices.

کلیدواژه‌ها [English]

  • switched-capacitor inverter
  • eightfold voltage gain
  • soft charging
  • low total standing voltage
  • reduced switch count

مراجع

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فصلنامه سیستم های انرژی پایدار
دوره 5، شماره 3
تیر 1405
صفحه 549-578

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