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Ang capacitor na naglo-load ay inaasahan batay sa pag-discharge ng resistor

Encyclopedia
Encyclopedia
Larangan: Ensiklopedya
0
China


Ang pagkalkula ng oras para sa kondensador na mag-discharge sa pamamagitan ng resistor ay kasangkot ang mga katangian ng RC circuit (o ang circuit na binubuo ng resistor at kondensador). Sa mga RC circuit, ang proseso ng pag-discharge ng kondensador ay maaaring ilarawan gamit ang isang eksponensiyal na punsiyon.


Pormula para sa pagkalkula ng oras ng pag-discharge


Kapag ang kondensador ay nag-discharge, ang pagbabago ng kanyang boltaheng V(t) sa loob ng oras t maaaring ipahayag gamit ang sumusunod na pormula:


f85ce20200aaf850bc965d5b2869be21.jpeg


  • V(t) ang boltahen ng kondensador sa oras t;



  • V0 ang simulaing boltahen (o ang boltahen kung saan nagsisimula ang pag-discharge ng kondensador);



  • R ang resistansiya sa circuit (ohms, Ω);



  • C ang kapasidad ng kondensador (farad, F);



  • e ang base ng natural na logarithm (humigit-kumulang 2.71828);



  • t ang oras (segundo, s).


Time constant


Ang time constant τ ay ang produkto ng RC, na kumakatawan sa oras na kinakailangan upang ang kondensador ay madischarge hanggang 1/e ng simulaing boltahen (humigit-kumulang 36.8%). Ang pormula para sa pagkalkula ng time constant τ ay:


image.png


Sum up


Ang pagkalkula ng oras ng pag-discharge ng kondensador sa pamamagitan ng resistor ay pangunahin ay batay sa eksponensiyal na pormula ng paghina. Ang time constant τ=RC ay naglalarawan ng bilis kung saan ang kondensador ay nag-discharge. Para sa pagkalkula ng tiyak na ratio ng voltahen, maaari gamitin ang itaas na pormula upang lutasin ang kinakailangang oras.


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