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諧振高壓等離子球磨電源研究
2021年電子技術(shù)應(yīng)用第9期
袁 松,,曾 敏,李 陽,,胡子鑫
華南理工大學 機械與汽車工程學院,,廣東 廣州510641
摘要: 等離子輔助球磨技術(shù)需要高壓電源激發(fā)等離子場,而目前高壓等離子球磨電源存在開關(guān)管數(shù)目多,、控制時序復雜,、可靠性低等問題。研制了采用單管結(jié)構(gòu)的諧振高壓等離子球磨電源,。首先介紹了主電路的工作原理,詳細分析了初級諧振網(wǎng)絡(luò)的固有諧振頻率及諧振參數(shù)選擇,;利用變壓器與負載的串聯(lián)諧振網(wǎng)絡(luò)進一步提高輸出電壓幅值,;通過Simulink仿真,驗證了主電路工作波形以及諧振電壓增益,,其輸出電壓峰峰值可達到24 kV以上,。在此基礎(chǔ)上,,研制了一臺輸出功率3 kW樣機,并成功激發(fā)等離子場用于輔助球磨,。
中圖分類號: TM832
文獻標識碼: A
DOI:10.16157/j.issn.0258-7998.201266
中文引用格式: 袁松,,曾敏,李陽,,等. 諧振高壓等離子球磨電源研究[J].電子技術(shù)應(yīng)用,,2021,47(9):91-95.
英文引用格式: Yuan Song,,Zeng Min,,Li Yang,et al. Research on resonant high voltage plasma ball milling power supply[J]. Application of Electronic Technique,,2021,,47(9):91-95.
Research on resonant high voltage plasma ball milling power supply
Yuan Song,Zeng Min,,Li Yang,,Hu Zixin
School of Mechanical & Automotive Engineering,South China University of Technology,,Guangzhou 510641,,China
Abstract: Plasma assisted ball milling technology requires high voltage power supply to excite the plasma field. However, high voltage plasma ball milling power supply has many problems such as large numbers of switch tubes, complicated control timing, and low reliability. Therefore, the high voltage plasma ball milling power supply based on single tube structure has been developed. Firstly, the working principle of the main circuit is introduced, and the inherent resonance frequency and resonance parameter selection of the primary resonance network are analyzed in detail. In addition, the voltage gain of the transformer and load series resonance network is utilized to further increase the amplitude of output voltage. Through Simulink software, the main circuit waveforms and the resonance voltage gain are verified. The peak-to-peak output voltage reach more than 24 kV. Based on the above, a prototype with an output power of 3 kW is developed, and the plasma field is successfully excited and used in auxiliary field ball milling.
Key words : silicon controlled rectifier;auxiliary field ball milling,;high voltage power supply,;resonance;plasma

0 引言

    傳統(tǒng)機械高能球磨中利用機械能使材料內(nèi)部反復形變,、細化,、固相變化等過程以制備具有良好性能的化合物粉末[1]。但其機械能作用效率較低,、耗能大且球磨過程需要較長時間,,容易帶來介質(zhì)污染[2]。針對上述問題,,等離子體輔助球磨技術(shù)應(yīng)運而生[3-4],,利用等離子體激發(fā)的高活性粒子對表面的活化與機械破碎的雙重作用加強了粉末細化,大幅提高了球磨的效率,,且等離子球磨在真空電離,,不會帶來污染物。等離子球磨過程中等離子放電與機械效應(yīng)的比值不同對輔助球磨的影響不同,,因此研制具有可控放電參數(shù)的高壓等離子球磨電源具有重要意義,。

    以往工頻高壓電源整機效率低,變壓器體積及損耗較大,,因此越來越多的高壓等離子電源采用高頻電源[5],,利用在放電電極間施加高頻高壓交流電來激發(fā)等離子體,,減少了電源體積和提高了電源效率。目前高壓高頻電源存在控制結(jié)構(gòu)復雜的問題,,一般采用前級全橋整流電路,,Buck電路直流調(diào)壓加上全橋逆變結(jié)構(gòu),完成由AC-DC-AC的變換,,時序控制復雜[6-8],,電源可靠性較低,不利于等離子體輔助球磨系統(tǒng)長時間的穩(wěn)定工作,。




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作者信息:

袁  松,曾  敏,,李  陽,,胡子鑫

(華南理工大學 機械與汽車工程學院,廣東 廣州510641)




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