全橋式零電壓切換技術之感應加熱器

The Full-Bridge Zero-Voltage-Switched Induction Heater

王榮爵(R.J. Wang) ； 張宏榮(H.R. Zhang)

《華岡工程學報》 21期 (2007/06) Pp. 145-154

https://doi.org/10.29987/CCUHKJE.200706.0021

摘要

本論文提出設計及製造一套新型感應加熱器的研究方法，並針對整個設計流程包含全橋共振反流器、具有相移脈波寬度調變功能的控制電路、隔離電源與驅動並聯關關元件的電路、串聯諧振負載的穩態分析與零電壓切換做介紹。
一般應用於感應加熱器的電源，通常以變化頻率來控制感應線圈的電流。本論文則探討零電壓切換的控制方法、驅動電路設計與諧振能量的研究。使用相位移動調整方法可達到零電壓切換，且使得低功率與高功率都將保持柔性切換的狀態，進而達到可控性佳、柔性切換的與延長元件壽命等的優點。
最後，此感應加熱器在針對不同操作頻率下量測開關元件，證實有零電壓切換的效果，實驗結果證明零電壓狀況符合穩態分析的趨勢。

關鍵字

感應加熱應用 ； 共振反流器 ； 零電壓切換 ； 相位移控制 ； 相位鎖定

並列摘要

This paper describes the development procedures of turbine blade from design to manufacturing and validation before being assembly. Some of technologies transferred from aircraft design are depicted in detail.
he design methods of a new induction heater are proposed in this paper. These design approaches include the complete design procedures of the induction heater, the phase shift modulation control circuit, the isolated power and drive circuit which can drive parallel device of MOSFET, the stead-state analysis of the series-resonant series-loaded circuit, and the relationships of the zero-voltage-switched techniques.
In the general design method of the induction heater, the optoisolation module usually is used, but it can't keep current efficiently and fixed delay time in the wild range frequency. Thus, we design the drive circuit which includes MOSFET devices and an isolation transformer. This circuit can be used in 250kHz switching frequency and provides a large gate current. From the results of the experiment, the proposed methodology can easily be applied to the design of the induction heater.
Finally, the power switches of this induction heater present zero-voltage-switched operation at different output frequency.

並列關鍵字

Induction Heating Application ； Resonant Inverter ； Zero Voltage Switched ； Phase Shift Control