I. Kula da girman inrush halin yanzu da aka tsara a cikin wayar PCB
A cikin gwajin, sau da yawa gamu da ainihin ƙirar PCB ba zai iya biyan buƙatun hawan ba.Ƙirar injiniyoyi na gaba ɗaya, kawai la'akari da tsarin aikin tsarin, kamar ainihin aikin tsarin kawai yana buƙatar ɗaukar 1A na halin yanzu, za a tsara zane bisa ga wannan, amma yana yiwuwa tsarin yana buƙatar zama. wanda aka tsara don hawan hawan jini, mai jujjuyawa na yanzu don isa 3KA (1.2 / 50us & 8 / 20us), don haka yanzu na tafi ta 1A na ainihin ƙirar aiki na yanzu, ko zai iya cimma ƙarfin haɓaka na wucin gadi na sama?Haƙiƙanin ƙwarewar aikin shine ya gaya mana cewa wannan ba zai yiwu ba, don haka ta yaya za a yi kyau?Anan akwai hanyar ƙididdige wayoyi na PCB za a iya amfani da su azaman tushe don ɗaukar halin yanzu.
Misali: 0.36mm nisa na 1oz tagulla foil, kauri 35um layin a cikin 40us rectangular halin yanzu karuwa, matsakaicin inrush halin yanzu na kusan 580A.Idan kuna son yin ƙirar kariya ta 5KA (8/20us), to gaban PCB wayoyi yakamata ya zama m 2 oz jan karfe 0.9mm nisa.Na'urorin tsaro na iya dacewa don shakata da faɗin.
II.Kula da shimfidar abubuwan haɗin tashar jiragen ruwa ya kamata ya zama amintaccen tazara
Ƙirƙirar ƙirar tashar jiragen ruwa ban da tazarar aminci na ƙirar wutar lantarki na yau da kullun, dole ne mu kuma yi la'akari da tazarar aminci na ƙwanƙwasawa mai wucewa.
A kan ƙirar ƙarfin lantarki na yau da kullun lokacin da tazarar aminci za mu iya komawa zuwa ƙayyadaddun ƙayyadaddun bayanai na UL60950.Bugu da ƙari, muna ɗaukar UL a cikin ma'aunin UL796 a cikin allon da'ira da aka buga tare da ƙimar gwajin ƙarfin lantarki shine 40V / mil ko 1.6KV / mm.Wannan jagorar bayanai tsakanin masu gudanarwa na PCB na iya jure jurewar gwajin ƙarfin lantarki na Hipot yana da amfani sosai.
Alal misali, bisa ga 60950-1 Table 5B, 500V aiki ƙarfin lantarki tsakanin masu gudanarwa ya kamata su hadu da 1740Vrms jure gwajin ƙarfin lantarki, kuma 1740Vrms kololuwa ya zama 1740X1.414 = 2460V.Dangane da ma'aunin saitin 40V/mil, zaku iya ƙididdige tazara tsakanin masu gudanarwa na PCB biyu kada ya zama ƙasa da 2460/40 = 62mil ko 1.6mm.
Kuma surges ban da abubuwan da ke sama na al'ada don lura, amma kuma kula da girman girman da ake amfani da shi, da halaye na na'urar kariya don haɓaka tazarar aminci zuwa tazarar 1.6mm, matsakaicin yanke-kashe creepage ƙarfin lantarki na 2460V , Idan muka ƙara ƙarfin lantarki har zuwa 6KV, ko ma 12KV, to, ko wannan aminci tazarar da za a karuwa ya dogara da halaye na karuwa overvoltage na'urar kariya, wanda kuma mu Engineers sukan ci karo da gwajin a lokacin da karuwa creeps da karfi.
yumbu fitarwa tube, alal misali, a cikin abin da ake bukata na 1740V jure ƙarfin lantarki, mu zabi na'urar kamata ya zama 2200V, kuma shi ne a cikin hali na sama karuwa, ta fitarwa karu ƙarfin lantarki har zuwa 4500V, a wannan lokaci, bisa ga na sama. lissafin, tsaron lafiyar mu shine: 4500/1600 * 1mm = 2.8125mm.
III.Kula da wurin da na'urorin kariyar overvoltage ke cikin PCB
Wurin da na'urar ke da kariya an saita shi ne a gaban gaban tashar da aka kariya, musamman idan tashar tana da reshe ko kewaye fiye da ɗaya, idan an saita ta ta kewaye ko ta baya, aikinta na kariya zai ragu sosai.A hakikanin gaskiya, mu wani lokaci saboda wurin bai isa ba, ko don kyawawan shimfidar wuri, ana manta da waɗannan batutuwa.
IV.Kula da babban hanyar dawowa na yanzu
Babban hanyar dawowar yanzu dole ne ya kasance kusa da wutar lantarki ko harsashi na ƙasa, mafi tsayin hanyar, mafi girman rashin ƙarfi na dawowa, girman girman madaidaicin halin yanzu wanda matakin matakin ƙasa ya haifar, tasirin wannan ƙarfin lantarki akan. yawancin kwakwalwan kwamfuta suna da kyau, amma kuma ainihin mai laifi na sake saitin tsarin, kullewa.
Lokacin aikawa: Jul-14-2022