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</span>http://www.10000kw.com</p><p><span>手機(jī): </span>021-69585559</p><p><span>地址: </span>上海市嘉定區(qū)科福路358號(hào)4號(hào)樓4樓</p><p>[當(dāng)前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="t5nvjht" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="3bzftxn" class="box"><p><p style="text-indent:25px">為了完成多個(gè)大功率電源模塊的并聯(lián)輸出，目前國(guó)內(nèi)的工程師通常會(huì)選擇使用外環(huán)均流調(diào)節(jié)模式、內(nèi)環(huán)均流調(diào)節(jié)模式或外置控制器均流調(diào)節(jié)模式，以此完成均流調(diào)節(jié)。其中，外置控制器均流調(diào)節(jié)模式已經(jīng)逐漸成為均流調(diào)節(jié)的主要發(fā)展方向。采用外置控制處理器之后，處理器將會(huì)處理來(lái)自各模塊和負(fù)載上的電壓和電流取樣信號(hào)，并采用某種控制策略，產(chǎn)生各功率單元所需的電壓控制信號(hào)Vconi（i=1，2，……，n）從而達(dá)成控制并聯(lián)系統(tǒng)，寶山區(qū)大功率電源模塊廠家有哪些、實(shí)現(xiàn)穩(wěn)壓和均流的控制目的，寶山區(qū)大功率電源模塊廠家有哪些，寶山區(qū)大功率電源模塊廠家有哪些。在實(shí)際的操作過(guò)程中，因?yàn)橥庵每刂破骱透鞑⒙?lián)模塊需要眾多的信號(hào)連接，如果采用模擬方式實(shí)現(xiàn)，就需要過(guò)多的電纜連接線，系統(tǒng)就極易受到各種干擾，造成穩(wěn)定性和可靠性的降低，而且模擬控制器難以實(shí)現(xiàn)優(yōu)化的控制策略。大功率電源模塊封裝尺寸有插針，貼片的，和螺旋。寶山區(qū)大功率電源模塊廠家有哪些</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="寶山區(qū)大功率電源模塊廠家有哪些,大功率電源模塊" src="https://tyunfile.71360.com/UploadFile/shdsdz/637393060379653267/3899269.png"></div><p style="text-indent:25px">大功率電源模塊在電壓轉(zhuǎn)換過(guò)程中有能量損耗，產(chǎn)生熱能導(dǎo)致模塊發(fā)熱，降低電源的轉(zhuǎn)換效率，影響電源模塊正常工作，但什么情況下會(huì)造成大功率電源模塊發(fā)熱較嚴(yán)重呢？負(fù)載過(guò)流，超出數(shù)據(jù)手冊(cè)應(yīng)用范圍使得內(nèi)部關(guān)鍵器件溫度飆升；環(huán)境溫度過(guò)高或散熱不良；其他大發(fā)熱源熱傳遞。使用線性電源時(shí)要加散熱片,或選擇效率高的開關(guān)電源；輸出功率更大的模塊，確保有70%~80%的負(fù)載降額；降低環(huán)境溫度，保持散熱良好。噪聲是衡量電源模塊優(yōu)劣的一大關(guān)鍵指標(biāo)，在應(yīng)用電路中，模塊周邊元器件的設(shè)計(jì)布局等也會(huì)影響輸出噪聲，哪些因素對(duì)輸出噪聲有較大影響呢？電源模塊與主電路噪聲敏感元件距離過(guò)近；主電路噪聲敏感元件的電源輸入端處未接去耦電容；多路系統(tǒng)中各單路輸出的電源模塊之間產(chǎn)生差頻干擾；地線處理不合理；電源模塊輸入端的噪聲過(guò)大，未處理，直接耦合到電源模塊輸出端；寶山區(qū)大功率電源模塊廠家有哪些大功率電源模塊結(jié)合了大部分必要的組件，以提供即插即用的解決方案，取代了40多種不同的元器件。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="寶山區(qū)大功率電源模塊廠家有哪些,大功率電源模塊" src="https://tyunfile.71360.com/UploadFile/shdsdz/637393060799657446/5364070.png"></div><p style="text-indent:25px">電源作為電路系統(tǒng)的“心臟”，其重要性是顯而易見的。在選擇電源模塊時(shí)，除了要考慮輸入電壓范圍、額定功率、隔離耐壓、效率、紋波&噪聲等性能特性外，還需針對(duì)其高低溫性能和降額設(shè)計(jì)進(jìn)行可靠性測(cè)試。那么如何有效的選擇一款高性能高可靠性的大功率電源模塊呢？我們首先會(huì)關(guān)注大功率電源模塊的輸入電壓范圍、額定功率、隔離耐壓、效率、紋波&噪聲等輸入輸出特性，判斷是否滿足自己的使用要求，甚至參照數(shù)據(jù)手冊(cè)一一對(duì)照測(cè)試各項(xiàng)指標(biāo)，判斷是否和宣稱的一致。但對(duì)于大功率電源模塊的可靠性來(lái)說(shuō)，做完這些還是遠(yuǎn)遠(yuǎn)不夠的，還有兩個(gè)方面是需要深挖測(cè)試的，那就是高低溫性能和降額設(shè)計(jì)。</p><p style="text-indent:25px">大致上大功率電源可分為線性電源和開關(guān)電源兩類。線性電源主要包括工頻變壓器、大功率整流回路、輸出整流濾波器、控制電路、保護(hù)電路等。它是先將交流電經(jīng)過(guò)變壓器變壓，再經(jīng)過(guò)整流電路整流濾波得到直流電壓，再經(jīng)過(guò)電壓反饋調(diào)整輸出電壓，就得到高精度的直流電壓。開關(guān)電源是通過(guò)電子技術(shù)實(shí)現(xiàn)的。先是把電網(wǎng)輸入交流整流成直流，通過(guò)逆變器高頻PWM(脈沖寬度調(diào)制)信號(hào)控制開關(guān)管，輸出鋸齒狀的高頻交流電壓并加到開關(guān)變壓器初級(jí)上，開關(guān)變壓器次級(jí)感應(yīng)出高頻電壓,經(jīng)整流濾波供給負(fù)載需要的直流電壓，同時(shí)還防止高頻噪聲對(duì)負(fù)載的干擾。輸出部分通過(guò)一定的電路反饋給控制電路，控制PWM占空比,以達(dá)到穩(wěn)定輸出的目的。電磁兼容容易造成輸入電壓高，如雷擊浪涌、群脈沖。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="寶山區(qū)大功率電源模塊廠家有哪些,大功率電源模塊" src="https://tyunfile.71360.com/UploadFile/shdsdz/637393060608619787/3503048.png"></div><p style="text-indent:25px">大功率電源模塊紋波是指疊加在輸出直流電上的交流成分，紋波幅值是交流成分的波峰與波谷之間的峰峰值，狹義的紋波是指在輸出直流電中含有工頻交流成分。工頻，是指電力系統(tǒng)的發(fā)電、輸電、變電與配電設(shè)備以及工業(yè)與民用電氣設(shè)備采用的額定頻率，單位赫茲HZ。中國(guó)采用 50Hz，有些國(guó)家采用60Hz。紋波是由電容充放電、PWM調(diào)節(jié)等所產(chǎn)生，指在輸出時(shí)，由電源本身開關(guān)引起的一種固定頻率波動(dòng)。當(dāng)開關(guān)電源在工作狀態(tài)時(shí)，每一個(gè)開關(guān)過(guò)程電能從輸入端被泵到輸出端，在輸出電容上會(huì)形成一個(gè)充放電的過(guò)程。這導(dǎo)致了輸出電壓的波動(dòng)，波動(dòng)頻率和開關(guān)管開關(guān)頻率相同，輸出紋波指的就是這個(gè)波動(dòng)。大功率電源模塊為設(shè)計(jì)電源供應(yīng)器的工程師提供多種不同的選擇。寶山區(qū)大功率電源模塊廠家有哪些</p><p style="text-indent:25px">大功率電源模塊主要作用是電壓轉(zhuǎn)換，可以將交流或直流電變換成你想要的交流或直流電。寶山區(qū)大功率電源模塊廠家有哪些</p><p style="text-indent:25px">大功率電源模塊的輸出電壓為什么會(huì)變低？輸入電壓偏低是較容易被忽略的情況，當(dāng)輸出有問(wèn)題時(shí)我們應(yīng)該一時(shí)間檢查輸入是否正常。對(duì)于輸入為定壓或?qū)拤旱碾娫茨K，當(dāng)輸入值偏低時(shí)將導(dǎo)致輸出值也偏低。當(dāng)然，這種情況是有限度的，對(duì)于一個(gè)特定的模塊來(lái)說(shuō)，當(dāng)輸入電壓過(guò)低時(shí)將導(dǎo)致其不能工作，無(wú)輸出電壓。輸出過(guò)載是指負(fù)載工作功率大于電源模塊的額定輸出功率，過(guò)載情況下電源模塊的輸出電壓明顯被拉低。以ZY0505FS-1W為例，當(dāng)負(fù)載電流增大到300mA時(shí)，輸出電壓只有4.5V。持續(xù)過(guò)載將影響到電源模塊的工作效率、穩(wěn)定性以及散熱情況，導(dǎo)致模塊使用壽命減少。寶山區(qū)大功率電源模塊廠家有哪些</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/3090980.html</p></div></div></div></div></div><div id="ffdj533" class="page-right twoColRt"><div id="vjpnbxl" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="xvbh5t5" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" alt="福建ZF配件哪家強(qiáng) 信息推薦自業(yè)物資供應(yīng)" class="vcenter" 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