I. Nika ingqalelo kubungakanani be-inrush yangoku eyilwe kwiingcingo zePCB
Kuvavanyo, uhlala udibana noyilo lwangaphambili lwePCB alukwazi ukuhlangabezana neemfuno zotyando.Uyilo lweenjineli ngokubanzi, luthathela ingqalelo kuphela uyilo olusebenzayo lwenkqubo, njengomsebenzi wangempela wenkqubo kufuneka kuphela ukuthwala i-1A yangoku, uyilo luya kuyilwa ngokwale nto, kodwa kunokwenzeka ukuba inkqubo kufuneka yenzelwe utyando, utyando oludlulayo lwangoku ukufikelela kwi-3KA (1.2/50us & 8/20us), ke ngoku ndihamba nge-1A yoyilo loyilo olusebenzayo lwangoku, ingaba inokufezekisa amandla otyando odlulayo angentla?Amava okwenene eprojekthi kukusixelela ukuba oku akunakwenzeka, ngoko ke ukwenza njani kakuhle?Nantsi indlela yokubala iingcingo zePCB zingasetyenziswa njengesiseko sokuthwala umsinga okhawulezileyo.
Umzekelo: 0.36mm ububanzi 1oz ifoyile yobhedu, ubukhulu 35um imigca kwi 40us uxande inyuka ngoku, ubuninzi inrush lwangoku malunga 580A.Ukuba ufuna ukwenza i-5KA (8/20us) uyilo lokukhusela, ngoko umphambili we-PCB wiring kufuneka ube nengqiqo 2 oz foil yobhedu 0.9mm ububanzi.Izixhobo zokhuseleko zinokufaneleka ukukhulula ububanzi.
II.Nika ingqwalaselo kulwakhiwo lwamalungu ezibuko lokunyuka kufuneka kube sisithuba esikhuselekileyo
Uyilo lwezibuko lokunyuka ukongeza kuyilo lwethu oluqhelekileyo lwezithuba zokhuseleko loyilo lombane, kufuneka kwakhona sithathele ingqalelo isithuba sokhuseleko lotyando oludlulayo.
Kuyilo oluqhelekileyo lombane osebenzayo xa isithuba sokhuseleko sinokubhekisa kwiinkcukacha ezifanelekileyo ze-UL60950.Ukongeza, sithatha i-UL kumgangatho we-UL796 kwibhodi yesekethe eprintiweyo ukumelana nomgangatho wovavanyo lombane yi-40V / mil okanye 1.6KV / mm.Esi sikhokelo sedatha phakathi kwee-PCB zabaqhubi sinokumelana nesithuba sokhuseleko lovavanyo lwe-voltage ye-Hipot siluncedo kakhulu.
Umzekelo, ngokwe-60950-1 Itheyibhile 5B, i-500V yombane osebenzayo phakathi kwabaqhubi kufuneka ibe kukuhlangabezana ne-1740Vrms ukumelana novavanyo lombane, kunye ne-1740Vrms peak kufuneka ibe yi-1740X1.414 = 2460V.Ngokomgangatho wokusetwa kwe-40V/mil, ungabala isithuba phakathi kwee-conductor ezimbini ze-PCB akufanele zibe ngaphantsi kwe-2460/40 = 62mil okanye i-1.6mm.
Kwaye ukunyuka okungaphezulu kwezi zinto zingasentla ziqhelekileyo ukuba ziqatshelwe, kodwa kwakhona ingqalelo ubungakanani botyando olusetyenzisiweyo, kunye neempawu zesixhobo sokukhusela ukunyusa isithuba sokhuseleko ukuya kwisithuba esisi-1.6mm, ubuninzi be-creepage voltage enqunyiweyo ye-2460V. , ukuba sinyusa i-voltage ukuya kuthi ga kwi-6KV, okanye nakwi-12KV, ngoko ke ukuba esi sithuba sokhuseleko sinyuka sixhomekeke kwiimpawu zesixhobo sokukhusela i-surge overvoltage, ekwayiNjineli yethu ehlala idibana kuvavanyo xa utyando lunyonyoba phezulu.
ityhubhu yokukhupha iCeramic, umzekelo, kwimfuno ye-1740V yokumelana nombane, sikhetha isixhobo kufuneka sibe yi-2200V, kwaye kwimeko yokunyuka okungentla, i-voltage yayo yokukhupha i-spike ukuya kuthi ga kwi-4500V, ngeli xesha, ngokutsho oku ngasentla. ukubala, indawo yethu yokhuseleko yile: 4500/1600 * 1mm = 2.8125mm.
III.Nika ingqalelo indawo yezixhobo zokukhusela umbane kwi-PCB
Indawo yesixhobo sokukhusela ibekwe ikakhulu kwindawo yangaphambili yezibuko elikhuselweyo, ngakumbi xa izibuko linesebe elingaphezulu kwesinye okanye isiphaluka, ukuba isetyenzisiwe ngokudlula okanye indawo yokubuyela ngasemva, ukusebenza kwayo kwempembelelo yokukhusela kuya kuncitshiswa kakhulu.Enyanisweni, ngamanye amaxesha ngenxa yokuba indawo ayanelanga, okanye ngenxa ye-aesthetics yoyilo, le miba idla ngokulibaleka.
IV.Nika ingqalelo kwindlela enkulu yokubuya yangoku
Indlela enkulu yokubuya yangoku kufuneka isondele kunikezelo lwamandla okanye iqokobhe lomhlaba, ixesha elide indlela, kokukhona imbuyekezo enkulu, ubukhulu bexeshana elidlulayo elibangelwa kukunyuka komgangatho womhlaba, impembelelo yalo mbane iitshiphusi ezininzi zilungile, kodwa kwakhona oyena nobangela wokusetwa kwakhona kwenkqubo, ukutshixa.
Ixesha lokuposa: Jul-14-2022