Olee ngwa ngwa atụle nguzogide nke PCB elu ọla kọpa waya?

Ọla kọpa bụ oyi akwa igwe na-eduzikarị n'elu bọọdụ sekit (PCB). Tupu ịkọwa nguzogide ọla kọpa na PCB, biko mara na nguzogide ọla kọpa na-agbanwe na okpomọkụ. Iji chọpụta nguzogide ọla kọpa n'elu PCB, enwere ike iji usoro a.

Mgbe ị na-agbakọ uru nguzogide onye nduzi izugbe, enwere ike iji usoro a.

resistance of PCB surface copper wire

ʅ: ogologo onye nduzi [mm]

W: obosara onye nduzi [mm]

t: eduzi ọkpụrụkpụ [μm]

ρ: conductivity nke onye na-eduzi [μ ω cm]

Iguzogide ọla kọpa dị na 25°C, ρ (@ 25°C) = ~ 1.72μ ω cm

Ke adianade do, ọ bụrụ na ị maara na-eguzogide ọla kọpa kwa unit ebe, Rp, dị iche iche okpomọkụ (dị ka e gosiri na ọnụ ọgụgụ dị n'okpuru ebe a), i nwere ike iji na-esonụ usoro atụmatụ nguzogide nke dum ọla kọpa, R. Rịba ama na akụkụ nke ọla kọpa egosiri n'okpuru bụ ọkpụrụkpụ (t) 35μm, obosara (w) 1mm, ogologo (ʅ) 1mm.

resistance of PCB surface copper wireresistance of PCB surface copper wire

Rp: nguzogide kwa mpaghara otu

ʅ: ogologo ọla kọpa [mm]

W: obosara ọla kọpa [mm]

t: ọkpụrụkpụ ọla kọpa [μm]

Ọ bụrụ na akụkụ nke ọla kọpa bụ 3mm n'obosara, 35μm na ọkpụrụkpụ na 50mm n'ogologo, uru nguzogide R nke ọla kọpa na 25 ° C bụ.

resistance of PCB surface copper wire

Ya mere, mgbe 3A ugbu a na-asọba ọla kọpa n'elu PCB na 25 ° C, voltaji na-adaba ihe dịka 24.5mV. Otú ọ dị, mgbe okpomọkụ adahade ka 100 ℃, iguzogide uru na-abawanye site 29% na voltaji dobe na-aghọ 31.6mV.

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Oge nzipu: Nov-12-2021