脈沖電鍍電源的設計

電子機電論文編號:JD1026  論文字數:14121,頁數:31

目  錄
1．緒論  1
2.脈沖電鍍性能分析及其方安確定  2
 2．1 脈沖電鍍改進方向和技術參考  2
 2.1.1脈沖波形  2
 2.1.2脈沖參數參考  3
 2.1.3陰陽極導線的載流量  3
 2．2電鍍電源的技術指標,方案確定  4
 2.2.1技術指標  4
 2.2.2方案確定  4
3.設計詳解  7
3．1脈沖電鍍電源各部分功能  7
 3.1.1整流部分  7
 3.1.2斬波穩流、穩壓部分  8
 3.1.3對恒流或恒壓源進行PWM調制  12
 3.1.4驅動電源、工作電源  18
 3.1.5過流、過壓保護  18
3．2硬件結構  18
 3.2.1絕緣柵雙機晶體管(IGBT)   18
 3.2.2IGBT的驅動(EXB841)   19
 3.2.3UC2526脈寬調制器  20
 3.2.4電流取樣反饋單元  23
 3.2.5電壓取樣反饋單元  23
 3.2.6電壓調節器AVR,電流調節器ACR  23
3．3參數計算  23
 3.3.1脈沖變壓器的參數計算  23
 3.3.2整流二極管D41、D42的參數  24
 3.3.3橋式逆變電路IGBT、Q31、Q32、Q33、Q34的參數  24
 3.3.4耦合電容C35  24
 3.3.5斬波開關管IGBT、Q21的參數  24
 3.3.6濾波電感L的參數確定  25
 3.3.7續流二極管D22參數  25
4．總結  26
參考文獻  27
謝辭  28
附錄1  30

脈沖電鍍電源的設計
摘要：電鍍是改變固體材料表面特性的一種方法，它一般可分為直流電鍍、周期換向電鍍和脈沖電鍍。采用脈沖電鍍可以獲得比采用直流電鍍更優良的鍍層性能。目前，脈沖電鍍電源中電流容量大的，只有方波，有的還不具有恒流功能，但采用先前的方法，電流容量不大，效率低，滿足不了大零件電鍍的需要。另外，電鍍工藝還要求電鍍用的脈沖電源具有恒流/恒壓、脈沖頻率、以及電壓、電流可調節的特點。因此，本文開發了一種具有高效率、大功率、多波形、頻率調節范圍寬、恒壓/恒流、 體積重量小等特點的脈沖電鍍電源。它能夠有效改進現有脈沖電鍍電源的不足，給電鍍的生產和研究提供更多的益處。

關鍵詞: 脈沖電鍍；多波形脈沖電源；信號源

The Design of Pulse Galvanization Power Source
Abstract：Electroplating is a method which can change the surface performance of the solid materials .It is generally divide into DC electroplating, commutation cycle electroplating and pulse electroplating. Adopting pulse electroplating can obtain more excellent performance of the plating layer than the traditional DC electroplating. At present , the pulse electroplating powers can supply large current capacity but only square wave, and some do not have the function of constant current .However, it will exist small current capacity, low efficiency and insufficient to meet the need of electroplating to large parts. In addition, the electroplating process also requires the electroplating pulse power with constant current or constant pressure, pulse frequency, and adjustable voltage and Current .In this paper, therefore, a new pulse electroplating power is developed , which has many advantages, such as high efficiency, high power, multi-wave, wide range of frequency adjustment, the constant voltage or constant current, smallness in size and lightness in weight. It can effectively improve the disadvantages of the pulse electroplating power, and it will offer more benefits for  the production and research to electroplating.

Key words: Pulse Electroplating ; Multi-Wave Pulse Power; Signal Source