發(fā)布時間：2018-09-19 17:31

【摘要】：感應加熱電源的工業(yè)發(fā)展趨勢是高頻化、高效率、體積小、數(shù)字智能化、控制精確化,研究開發(fā)基于IGBT的感應加熱電源已十分必要。本文以中頻感應加熱電源為研究對象,以IGBT為主功率開關器件,采用并聯(lián)型諧振逆變拓撲,完成2kHz/60kW并聯(lián)型中頻感應加熱電源的設計。 本文首先對感應加熱電源的發(fā)展現(xiàn)狀及前景作了分析,并闡述了感應加熱的基本原理。從適用于大功率應用場合的電流型并聯(lián)負載諧振逆變器出發(fā),對比了并聯(lián)諧振逆變器各種調功方式的優(yōu)缺點,提出采用高頻Buck斬波器做為調節(jié)電源輸出功率的手段。文中重點對并聯(lián)諧振逆變器進行分析,對比其各工作狀態(tài),指出為保證逆變器可靠運行采用固定重疊角的控制策略,逆變器諧振負載工作在容性準諧振狀態(tài)；采用基于DSP的數(shù)字鎖相、頻率自動跟蹤控制策略,逆變器開關頻率快速跟隨負載固有頻率的變化,諧振負載工作在所期望的弱容性準諧振狀態(tài)。文中提出了一種精確計算輸出功率的方法,提高了電源的輸出控制精確度。 本文詳細闡述了并聯(lián)型感應加熱電源的設計過程,分析了主電路的設計方法以及關鍵器件的選型,控制系統(tǒng)采用TI公司的TMS320LF2407A DSP作為控制核心,設計了一種可靠的運行保護機制,并對電源的散熱系統(tǒng)進行了仿真設計。在上述分析的基礎上,本文成功研制出了一臺功率為60kW的高性能的并聯(lián)型中頻感應加熱電源。試驗結果表明,該電源的電氣性能達到了預期的指標要求,有利于提高感應加熱熱場的穩(wěn)定性,有利于提高感應加熱的諧振頻率。
[Abstract]:The industrial development trend of induction heating power supply is high frequency, high efficiency, small volume, digital intelligence and accurate control. It is necessary to develop induction heating power supply based on IGBT. In this paper, if induction heating power supply is taken as research object, IGBT as main power switch device and parallel resonant inverter topology adopted to complete the design of 2kHz/60kW parallel intermediate frequency induction heating power supply. In this paper, the present situation and prospect of induction heating power supply are analyzed, and the basic principle of induction heating is expounded. Starting from the current-mode parallel load resonant inverter suitable for high power applications, the advantages and disadvantages of various power regulation modes of parallel resonant inverter are compared, and a high frequency Buck chopper is proposed as a means to adjust the output power of the power supply. In this paper, the parallel resonant inverter is analyzed, and its working states are compared. It is pointed out that the resonant load of the inverter works in the capacitive quasi-resonant state in order to ensure the reliable operation of the inverter using the control strategy of fixed overlap angle. Digital phase-locking based on DSP and frequency automatic tracking control strategy are adopted. The switching frequency of inverter follows the change of natural frequency of load quickly. The resonant load works in the expected weak capacitive quasi-resonant state. In this paper, a method to calculate the output power accurately is presented, which improves the output control accuracy of the power supply. In this paper, the design process of parallel induction heating power supply is described in detail, and the design method of main circuit and the selection of key devices are analyzed. The control system adopts TMS320LF2407A DSP of TI Company as the control core, and designs a reliable operation protection mechanism. And the emulation design of the heat dissipation system of the power supply is carried out. Based on the above analysis, a high performance parallel intermediate frequency induction heating power supply with power of 60kW has been successfully developed. The experimental results show that the electrical performance of the power supply meets the expected requirements, which is conducive to improving the stability of the induction heating heat field and the resonant frequency of the induction heating.
【學位授予單位】：北京交通大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM924.01

【參考文獻】

相關期刊論文 前10條

1 潘天明，張殿敏，朱長喜，趙明杰;100kW超音頻感應加熱電源[J];電力電子技術;1996年04期

2 吳兆麟,袁俊國,于非;高頻感應加熱裝置的負載匹配方法[J];電力電子技術;1999年04期

3 楊軍,周偉松,王培清,周景春;IGBT超音頻感應加熱電源相位跟蹤的研究[J];電力電子技術;2004年04期

4 劉慶豐,王華民,孫立萌,冷朝霞;基于IGBT并聯(lián)諧振逆變器工作方式的分析研究[J];電力電子技術;2004年04期

5 季翼鵬;沈錦飛;顏文旭;惠晶;;一種新型有源無損緩沖Buck變換器的研究[J];電力電子技術;2006年01期

6 沈宏，陳燁;30kW／50kHz　IGBT并聯(lián)諧振感應加熱電源[J];電力電子技術;1995年02期

7 沈旭,吳兆麟,馬駿,李廣勇;20kW／300kHz高頻感應加熱電源[J];電力電子技術;1996年02期

8 毛鴻,吳兆麟,候振程;感應加熱電源無相差頻率跟蹤控制電路[J];電力電子技術;1998年02期

9 Loveless,Rudnev,Alert,Dyer,許旭東,周大振,夏玉慶;領先的感應加熱熱處理設備[J];國外金屬熱處理;2000年01期

10 章亦葵，李津祖，，孫波，房朝暉，姜土林，趙長漢，李家驥，張永發(fā);20OkHz、75kW　SIT高頻感應加熱電源的研制[J];工業(yè)加熱;1996年01期

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