Copper wani nau'in karfe ne na gama gari a saman allon da'ira (PCB).Kafin kididdigar juriyar jan ƙarfe akan PCB, da fatan za a lura cewa juriyar jan ƙarfe ya bambanta da zafin jiki.Don ƙididdige juriyar jan ƙarfe a saman PCB, ana iya amfani da dabara mai zuwa.
Lokacin ƙididdige ƙimar juriya na janar na gabaɗaya, ana iya amfani da dabara mai zuwa.
ʅ: tsawon shugaba [mm]
W: fadin madugu [mm]
t: kauri mai jagora [μm]
ρ: conductivity na madugu [μ ω cm]
Resistance jan karfe yana a 25°C, ρ (@ 25°C) = ~ 1.72μ ω cm
Bugu da kari, idan kun san juriya na jan karfe a kowace yanki, Rp, a yanayin zafi daban-daban (kamar yadda aka nuna a cikin hoton da ke ƙasa), zaku iya amfani da wannan dabarar don kimanta juriyar dukkan jan ƙarfe, R. Lura cewa girman girman tagulla. jan karfe da aka nuna a ƙasa sune kauri (t) 35μm, faɗi (w) 1mm, tsayi (ʅ) 1mm.
Rp: juriya a kowane yanki na yanki
ʅ: tsayin jan karfe [mm]
W: nisa tagulla [mm]
t: jan karfe [μm]
Idan girman jan karfe shine 3mm a fadin, 35μm a cikin kauri da 50mm tsayi, ƙimar juriya R na jan karfe a 25 ° C shine
Don haka, lokacin da 3A halin yanzu ke gudana tagulla akan saman PCB a 25 ° C, ƙarfin lantarki ya faɗi kusan 24.5mV.Koyaya, lokacin da zafin jiki ya tashi zuwa 100 ℃, ƙimar juriya yana ƙaruwa da 29% kuma raguwar ƙarfin lantarki ya zama 31.6mV.
Lokacin aikawa: Nuwamba-12-2021