3HAC026271-001機(jī)器人模塊,3HAC027648-00102產(chǎn)品重量
在水電解氫氣和氧氣的設(shè)備中，也存在開(kāi)關(guān)電源的輸出端有倒灌電壓現(xiàn)象。
下面以這三種情況的倒灌電壓為例，給出開(kāi)關(guān)電源在此情況下的危害和解決方案。
例一：開(kāi)關(guān)電源在直流充電樁中的應(yīng)用的輸出端防倒灌電壓解決方案：
市場(chǎng)對(duì)新能源汽車電池充電和BMS配電系統(tǒng)有較高的要求。為給不同類型的汽車充電，要求直流充電樁中的輔助電源具有12V和24V兩種電壓值。大巴車充電系統(tǒng)的輔助電壓源供電采用24V供電，而小汽車充電系統(tǒng)的輔助電壓源供電電壓采用12V電壓值。
3HAC026271-001機(jī)器人模塊,3HAC027648-00102產(chǎn)品重量在電源設(shè)計(jì)時(shí)，輸出電壓為12V的開(kāi)關(guān)電源的輸出端濾波電解電容耐壓值一般選取16V的規(guī)格值，一旦24V電壓倒灌到電源的輸出端，相當(dāng)于把24V電壓加到16V電解電容兩端，電解電容會(huì)因?yàn)檫^(guò)壓損壞，導(dǎo)致12V的開(kāi)關(guān)電源失效。針對(duì)直流充電樁設(shè)備，我司有分立式方案和集中式方案兩種解決方案：針對(duì)分立式應(yīng)用方案(兩只開(kāi)關(guān)電源，一只輸出12V，一只輸出24V)，把輸出電壓為12V的開(kāi)關(guān)電源產(chǎn)品中的輸出濾波電解電容規(guī)格值選用35V。即使在輸出端倒灌24V電壓值，電解電容也在耐壓規(guī)格值內(nèi)，不存在電解電容過(guò)壓損壞對(duì)于集中式應(yīng)用方案(把12V和24V兩種輸出電壓集成在一個(gè)電源產(chǎn)品中，通過(guò)開(kāi)關(guān)檔位選擇輸出電壓)：輸出端的電解電容是共用電解電容，因此輸出端的濾波電解電容耐壓值選取為63V的規(guī)格值，即使輸出端存在60VDC的倒灌電壓，也不會(huì)損壞輸出濾波電解電容，保證濾波電解電容可靠工作，從而保證輸出端存在倒灌電壓時(shí)，開(kāi)關(guān)電源也不會(huì)損壞。由于開(kāi)關(guān)電源在正常工作時(shí)，輸出電流是通過(guò)二極管流入到負(fù)載。電流流過(guò)時(shí)，二極管會(huì)因?qū)▔航诞a(chǎn)生功率損耗，使得二極管發(fā)熱。為防止二極管發(fā)熱嚴(yán)重?fù)p壞，一般二極管的電流規(guī)格選取電源額定輸出電流的(5-10)Io，并且可以在二極管上增加散熱片，以降低二極管工作時(shí)的溫升。在工業(yè)領(lǐng)域或醫(yī)療輔助等行業(yè)，需要使用到氧氣或氫氣情況，部分客戶對(duì)于氧氣和氫氣的生產(chǎn)采用水電解實(shí)現(xiàn)。但是水電解完成后，氧氣和氫氣會(huì)發(fā)生化學(xué)反應(yīng)，在生成水的同時(shí)對(duì)外放電，此放電電壓會(huì)倒灌到系統(tǒng)前端的開(kāi)關(guān)電源輸出端，導(dǎo)致開(kāi)關(guān)電源存在倒灌電壓/電流，影響開(kāi)關(guān)電源的正常工作。開(kāi)關(guān)電源輸出端在接入不同的負(fù)載時(shí)，由于負(fù)載特性，系統(tǒng)在工作時(shí)，負(fù)載可能會(huì)產(chǎn)生電壓，此電壓倒灌到開(kāi)關(guān)電源的輸出端，影響電源和系統(tǒng)正常工作，甚至?xí)p壞開(kāi)關(guān)電源。本文根據(jù)開(kāi)關(guān)電源在實(shí)際應(yīng)用過(guò)程中的三個(gè)案例，通過(guò)對(duì)倒灌電壓產(chǎn)生的機(jī)理分析，給出不同的防倒灌電壓解決方案。is enough to meet the requirements of the control system. At the same time, the a/d modules used by PLC are transformed in an integral way, which can average the peak noise and induced noise of the input signal, and is suitable for industrial places with serious noise. Automatic rotation work in order to prevent the motor and electrical equipment from being affected by moisture or other faults not found in time due to the long-term use of the standby pump and its electrical equipment or standby pipeline, and when the standby pump needs to be put into operation in case of emergency failure of the working pump, it cannot be put into operation in time, so as to affect the mine safety, this system program designs the automatic rotation work control of 5 pumps, The control program automatically records and accumulates the parameters such as the number of starts and stops of the water pump and the operation time, the number of uses and flow of the pipeline, and the system automatically starts and stops the water pump and the corresponding pipeline in a certain order according to these operation parameters
