鋁電解電容的型號(hào)有多種類(lèi)型，在選用適當(dāng)型號(hào)之前，我們首先要了解鋁電解電容的優(yōu)缺點(diǎn)，這樣才能便于我們選擇適合的鋁電解電容型號(hào)。
There are many types of aluminum electrolytic capacitor. Before selecting the appropriate model, we should first understand the advantages and disadvantages of aluminum electrolytic capacitor, so as to facilitate us to choose the appropriate aluminum electrolytic capacitor model.
讓我們?cè)賮?lái)復(fù)習(xí)一遍鋁電解電容的優(yōu)點(diǎn)是具有易獲得大容量高耐壓、價(jià)格低廉等顯著優(yōu)點(diǎn)，常用在電源的輸入輸出濾波電路。
Let's review again the advantages of aluminum electrolytic capacitor is easy to obtain large capacity, high voltage, low price and other remarkable advantages, commonly used in the input and output filter circuit of power supply.
缺點(diǎn)：怕高溫。因?yàn)殇X電解電容的電解質(zhì)為液態(tài)，芯子發(fā)熱或環(huán)境溫度較高將導(dǎo)致電解液揮發(fā)，長(zhǎng)期高溫導(dǎo)致電解液干涸失效。
Disadvantages: afraid of high temperature. Because the electrolyte of aluminum electrolytic capacitor is liquid, the core heating or high ambient temperature will lead to electrolyte volatilization, and long-term high temperature will lead to electrolyte drying failure.
鋁電解電容失效示意圖
電源電路中鋁電解的應(yīng)用注意事項(xiàng)
Matters needing attention in application of aluminum electrolysis in power supply circuit
(1) 防止鹵素腐蝕
Prevention of halogen corrosion
鋁電解電容對(duì)氯元素、溴元素等非常敏感，如果使用含鹵素的助焊劑、清洗劑、固定劑、熏蒸劑，鹵化物可能透過(guò)封口膠塞侵入電容器內(nèi)部，極易引起電容陽(yáng)極腐蝕，在上電后加速電容失效。因此必須嚴(yán)格管控生產(chǎn)工藝過(guò)程中使用的相關(guān)敏感制劑的鹵素成分。
Aluminum electrolytic capacitor is very sensitive to chlorine and bromine. If halogen containing flux, cleaning agent, fixing agent and fumigant are used, halide may invade into the capacitor through sealing rubber plug, which is easy to cause anode corrosion of capacitor and accelerate capacitor failure after power on. Therefore, it is necessary to strictly control the halogen components of sensitive preparations used in the production process.
(2)存儲(chǔ)環(huán)境的控制和定期激活
Control and regular activation of storage environment
需控制電解電容的存放環(huán)境和時(shí)間，定期進(jìn)行上電賦能。
It is necessary to control the storage environment and time of electrolytic capacitor, and power on regularly.
鋁電解經(jīng)長(zhǎng)時(shí)間在高溫環(huán)境下存放飯后，電容陽(yáng)極氧化膜和電解液會(huì)發(fā)生化學(xué)反應(yīng)，造成耐壓下降、漏電流增大。當(dāng)突然上電，電容電壓接近額定電壓后，可能引起過(guò)壓失效或漏電流過(guò)大導(dǎo)致過(guò)熱失效。
After aluminum electrolysis is stored in high temperature environment for a long time, chemical reaction will occur between anodic oxide film and electrolyte, resulting in voltage drop and leakage current increase. When the capacitor voltage is close to the rated voltage, it may lead to over-voltage failure or large leakage current, resulting in overheating failure.
對(duì)應(yīng)單體電容特別是高壓類(lèi)電容，長(zhǎng)期存放后需激活處理，建議串接1kΩ保護(hù)電阻，逐漸加壓到額定電壓，維持1小時(shí)左右，使得電容陽(yáng)極氧化膜得以修復(fù)，漏電流回到正常水平。
The corresponding single capacitor, especially the high-voltage capacitor, needs to be activated after long-term storage. It is recommended to connect 1K & omega; protection resistor in series and gradually pressurize it to the rated voltage for about 1 hour, so that the anodic oxide film of capacitor can be repaired and the leakage current can return to normal level.
(3)合理布局PCB上的器件，使鋁電解電容遠(yuǎn)離熱源
Reasonable layout of devices on PCB to keep aluminum electrolytic capacitor away from heat source
(4)根據(jù)產(chǎn)品特性，選取固態(tài)電容。
According to the characteristics of the product, the solid state capacitor is selected.
如:在低壓大電流輸出的應(yīng)用場(chǎng)合，使用鋁固態(tài)電容。鋁固態(tài)電容具有極低的ESR和高紋波電流承受能力，非常適用于低壓大電流的整流濾波場(chǎng)合。
For example: in the application of low voltage and high current output, use aluminum solid state capacitor. Aluminum solid state capacitor has very low ESR and high ripple current withstand ability, which is very suitable for low voltage and high current rectification and filtering.
山東紅寶電子有限公司致力于滿足客戶(hù)多型號(hào)、高質(zhì)量、快速交付的采購(gòu)需求，擁有自主的倉(cāng)儲(chǔ)管理體系，電容品類(lèi)齊全，滿足更多用戶(hù)需求。
Shandong Hongbao Electronic Co., Ltd. is committed to meet customers' multi model, high-quality, fast delivery procurement needs, has its own warehouse management system, a complete range of capacitor categories, to meet the needs of more users.