Joang ho hakanya ka potlako ho hanyetsa PCB holim'a terata koporo?

Koporo ke lera le tloaelehileng la tšepe la conductive holim'a boto ea potoloho (PCB). Pele u hakanya khanyetso ea koporo ho PCB, ka kopo hlokomela hore ho hanyetsa ha koporo ho fapana le mocheso. Ho hakanya khanyetso ea koporo holim'a PCB, ho ka sebelisoa mokhoa o latelang.

Ha ho baloa boleng ba kakaretso ba khanyetso ea conductor R, ho ka sebelisoa foromo e latelang.

resistance of PCB surface copper wire

ʅ : bolelele ba mokhanni [mm]

W: bophara ba conductor [mm]

t: botenya ba conductor [μm]

ρ : conductivity ea conductor [μ ω cm]

Ho hanyetsa ha koporo ho 25°C, ρ (@ 25°C) = ~ ~1.72μ ω cm

Ho phaella moo, haeba u tseba ho hanyetsa koporo ka sebaka sa yuniti, Rp, ka mocheso o fapaneng (joalokaha ho bontšitsoe setšoantšong se ka tlase), u ka sebelisa mokhoa o latelang ho hakanya ho hanyetsa ha koporo eohle, R. Hlokomela hore litekanyo tsa litekanyo tsa koporo e ka tlase koporo e bontšitsoeng ka tlase ke botenya (t) 35μm, bophara (w) 1mm, bolelele (ʅ) 1mm.

resistance of PCB surface copper wireresistance of PCB surface copper wire

Rp: khanyetso sebakeng sa yuniti

ʅ: bolelele ba koporo [mm]

W: bophara ba koporo [mm]

t: botenya ba koporo [μm]

Haeba litekanyo tsa koporo li le 3mm ka bophara, 35μm ka botenya le 50mm ka bolelele, boleng ba ho hanyetsa R ba koporo ho 25 ° C ke

resistance of PCB surface copper wire

Kahoo, ha 3A hona joale e phalla koporo holim'a PCB holim'a 25 ° C, motlakase o theoha hoo e ka bang 24.5mV. Leha ho le joalo, ha mocheso o nyolohela ho 100 ℃, boleng ba ho hanyetsa bo eketseha ka 29% 'me ho theoha ha motlakase ho fetoha 31.6mV.

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Nako ea poso: Nov-12-2021