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El condensador de carga se calcula por el tiempo de descarga del resistor

Encyclopedia
Encyclopedia
Campo: Enciclopedia
0
China


El cálculo del tiempo para que el condensador se descargue a través del resistor implica las características del circuito RC (es decir, el circuito compuesto por el resistor y el condensador). En los circuitos RC, el proceso de descarga del condensador puede describirse mediante una función exponencial.


Fórmula de cálculo del tiempo de descarga


Cuando un condensador se descarga, el cambio de su voltaje V(t) con el tiempo t puede expresarse mediante la siguiente fórmula:


f85ce20200aaf850bc965d5b2869be21.jpeg


  • V(t) es el voltaje del condensador en el tiempo t;



  • V0 es el voltaje inicial (es decir, el voltaje al inicio de la descarga del condensador);



  • R es la resistencia en el circuito (ohmios, Ω);



  • C es la capacitancia del condensador (faradio, F);



  • e es la base del logaritmo natural (aproximadamente 2.71828);



  • t es el tiempo (segundos, s).


Constante de tiempo


La constante de tiempo τ es el producto de RC, que representa el tiempo necesario para que el condensador se descargue hasta 1/e del voltaje inicial (alrededor del 36.8%). La fórmula para calcular la constante de tiempo τ es:


image.png


Resumen


El cálculo del tiempo de descarga del condensador a través del resistor se basa principalmente en la fórmula de atenuación exponencial. La constante de tiempo τ=RC describe la velocidad a la que se descarga el condensador. Para el cálculo de una relación de voltaje específica, se puede utilizar la fórmula anterior para resolver el tiempo requerido.


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