混合型PWM控制應用於感應加熱系統

Application of Hybrid PWM Control In Induction Heating System

黃謙富(Chien-Fu Huang)

指導教授 ： 何金滿 ； 李俊耀

中原大學/工學院/電機工程研究所/碩士(2012年)

https://doi.org/10.6840/cycu201200386

摘要

由於感應加熱相較於傳統直接加熱，具備有加熱速度快、安全性高、產品品質好、幾乎無環境污染等許多優點；另一方面，隨著功率半導體元件製作技術的進步，使轉換器上的功率開關能夠操作在更高頻率的範圍，致使高頻感應加熱裝置具備了輕、薄、短、小、效率高的特色。

本論文以全橋式電路架構為基礎，建構一電壓饋入式電源轉換裝置，應用於串聯負載共振式感應加熱系統上。此電路控制方法係將脈波寬度調變技術、脈波密度調變技術及盲時時間控制等，整合而得。利用脈波寬度調變技術及盲時時間控制方式，使全橋各開關切換時之能量獲得適當的轉移，以降低功率開關之切換損失；以脈波密度調變技術，來增加開關可進行柔切動作的功率範圍。藉此使用混合型PWM控制來增加整體電路效益。

最後對本研究所建構之500W感應加熱系統做操作特性與整體效率方面的說明與量測，並對不同控制方法的結果比較和探討。

關鍵字

全橋式電源轉換 ； 效率 ； 混合型脈波寬度調變控制

並列摘要

Induction heating has the advantages of high efficiency, high quality, and low pollution, and had been used in many applications, especially in the metal treatments.

In this study, a load series resonant induction heating system with voltage source full bridge inverter has been constructed. The control scheme is the combination of dead time control, PWM (pulse width modulation) control, and PDM (pulse density modulation) control. The PWM and dead time control can reach energy transferring with less switching loss, and the PDM control can extend the soft-switching operation range.

Finally, the control characteristics and whole system efficiency are measured and analyzed on different types of control scheme.

並列關鍵字

hybrid pulse width modulation ； efficiency ； full bridge inverter

參考文獻

[31] 陳建興，全橋相移式高頻溫控感應加熱器之設計與研製，私立中原大學碩士論文，民國九十四年。

[5] M.P. Chen, J.K. Chen, K. Murata, M. Nakahara ,and K. Harada, “Surge Analysis of Induction Heating Power Supply with PLL” , IEEE Trans., on Power Electronics, Vol. 16, pp. 702-709, 6-10 Feb 2001.

[7] J. Acero, J. M. Burdio, L.A. Barragan, D. Navarro, and S. Llorente, “EMI Improvements Using the Switching Frequency Modulation in a Resonant Inverter for Domestic Induction Heating Appliances” , Power Electronics Specialists Conference, Vol. 4, pp. 3108-3112, 2004.

[8] T. Isobe, Y. Miyaji, T. Kitahara, K. Fukutani ,and R. Shimada, “Soft-switching Inverter for Variable Frequency Induction Heating Using Magnetic Energy Recovery Switch (MERS)”, Power Electronics and Applications Conference, Barcelona, Spain, 2009, Page(s):1-10, Sep. 2009.

[9] H. Kifune, Y. Hatanaka, and M. Nakaoka, “Cost Effective Phase Shifted Pulse Modulation Soft Switching High Frequency Inverter for Induction Heating Applications” ,IET Trans. on Electric Power Applications, Vol.151 No.1, Page(s):19-25. June 2004.