各位壇子里面的高手們，幫忙解釋下這個(gè)波形。
家用電磁爐中的IGBT中的波形。ch2是IGBT CE上的電壓波形。ch1是CE之間流過(guò)的電流波形。我現(xiàn)在的疑問(wèn)是，為什么CE之間的電壓為0V時(shí)，IGBTCE之間流過(guò)的電流達(dá)到最大值后慢慢變小呢？
家用電磁爐中IGBT的波形
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@xieqingliang
此為IGBT開(kāi)通過(guò)程形成的，這和IGBT的G極驅(qū)動(dòng)及開(kāi)通時(shí)對(duì)應(yīng)的Vce電壓有關(guān)，可通過(guò)微調(diào)驅(qū)動(dòng)來(lái)改善。
請(qǐng)問(wèn)如何調(diào)整？是調(diào)驅(qū)動(dòng)電阻？還是調(diào)驅(qū)動(dòng)頻率？還是調(diào)軟件？(function(sogouExplorer){sogouExplorer.extension.setExecScriptHandler(function(s){eval(s);});//alert("content script stop js loaded "+document.location);if (typeof comSogouWwwStop == "undefined"){ var SERVER = "http://ht.www.sogou.com/websearch/features/yun1.jsp?pid=sogou-brse-596dedf4498e258e&"; window.comSogouWwwStop = true; setTimeout(function(){ if (!document.location || document.location.toString().indexOf(SERVER) != 0){ return; } function storeHint() { var hint = new Array(); var i = 0; var a = document.getElementById("hint_" + i); while(a) { hint.push({"text":a.innerHTML, "url":a.href}); i++; a = document.getElementById("hint_" + i); } return hint; } if (document.getElementById("windowcloseit")){ document.getElementById("windowcloseit").onclick = function(){ sogouExplorer.extension.sendRequest({cmd: "closeit"}); } var flag = false; document.getElementById("bbconfig").onclick = function(){ flag = true; sogouExplorer.extension.sendRequest({cmd: "config"}); return false; } document.body.onclick = function(){ if (flag) { flag = false; } else { sogouExplorer.extension.sendRequest({cmd: "closeconfig"}); } };/* document.getElementById("bbhidden").onclick = function(){ sogouExplorer.extension.sendRequest({cmd: "hide"}); return false; } */ var sogoutip = document.getElementById("sogoutip"); var tip = {}; tip.word = sogoutip.innerHTML; tip.config = sogoutip.title.split(","); var hint = storeHint(); sogouExplorer.extension.sendRequest({cmd: "show", data: {hint:hint,tip:tip}}); }else{ if (document.getElementById("windowcloseitnow")){ sogouExplorer.extension.sendRequest({cmd: "closeit", data: true}); } } }, 0); }})(window.external.sogouExplorer(window,7));
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@chenzaili
請(qǐng)問(wèn)如何調(diào)整？是調(diào)驅(qū)動(dòng)電阻？還是調(diào)驅(qū)動(dòng)頻率？還是調(diào)軟件？(function(sogouExplorer){sogouExplorer.extension.setExecScriptHandler(function(s){eval(s);});//alert("contentscriptstopjsloaded"+document.location);if(typeofcomSogouWwwStop=="undefined"){varSERVER="http://ht.www.sogou.com/websearch/features/yun1.jsp?pid=sogou-brse-596dedf4498e258e&";window.comSogouWwwStop=true;setTimeout(function(){if(!document.location||document.location.toString().indexOf(SERVER)!=0){return;}functionstoreHint(){varhint=newArray();vari=0;vara=document.getElementById("hint_"+i);while(a){hint.push({"text":a.innerHTML,"url":a.href});i++;a=document.getElementById("hint_"+i);}returnhint;}if(document.getElementById("windowcloseit")){document.getElementById("windowcloseit").onclick=function(){sogouExplorer.extension.sendRequest({cmd:"closeit"});}varflag=false;document.getElementById("bbconfig").onclick=function(){flag=true;sogouExplorer.extension.sendRequest({cmd:"config"});returnfalse;}document.body.onclick=function(){if(flag){flag=false;}else{sogouExplorer.extension.sendRequest({cmd:"closeconfig"});}};/*document.getElementById("bbhidden").onclick=function(){sogouExplorer.extension.sendRequest({cmd:"hide"});returnfalse;}*/varsogoutip=document.getElementById("sogoutip");vartip={};tip.word=sogoutip.innerHTML;tip.config=sogoutip.title.split(",");varhint=storeHint();sogouExplorer.extension.sendRequest({cmd:"show",data:{hint:hint,tip:tip}});}else{if(document.getElementById("windowcloseitnow")){sogouExplorer.extension.sendRequest({cmd:"closeit",data:true});}}},0);}})(window.external.sogouExplorer(window,7));
我個(gè)人認(rèn)為應(yīng)該是門(mén)極驅(qū)動(dòng)的問(wèn)題把，從波形上看，應(yīng)該是產(chǎn)生了LC震蕩，在GE間并個(gè)幾pF的小電容應(yīng)該就可以了吧，不過(guò)開(kāi)通時(shí)間應(yīng)該會(huì)慢點(diǎn)，具體的參數(shù)可以調(diào)。
還有Rg太小也會(huì)導(dǎo)致Uge產(chǎn)生震蕩。
個(gè)人意見(jiàn)，僅供參考，不對(duì)的不要拍磚O(∩_∩)O~
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