tiristor SCR dimmer simple

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tiristor SCR dimmer simple

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Circuito dimmer. circuito regulador del nivel de luz. La ventaja frente a un potenciómetro sencillo es que aquí controlas una pequeña corriente y no toda la potencia de la bombilla pasa por el potenciómetro. el tiristor SCR Funciona como un transitor. Cuando tenga corriente en la puerta G cierra. (para empezar a funcionar necesita 0.6V) El tiristor sólo conduce durante los semiciclos positivos. (en los semiciclos negativos la tensión conducida es 0 V) lo de antes es un divisor de tensión que nos permite regular la corriente de la puerta. actuamos sobre el potenciómetro Si el potenciómetro está al 50% 220 Kohm. Aquí para al cuando alcanza los 0.6 V de entrada es cuando en el divisor de tensión arriba hay 140 V. Si potenciómetro al 75% para alcanzar los 0.6V necesita alcanzar los 200V arriba. Si lo bajamos al 25% la tensión de entrada necesaria para que en la puerta del SCR tengamos el 0.6V es unos 90V. total cuanto menos potenciómetro se conduce a partir de menos voltaje (más recorrido desde 90 a 230) con lo que hay más potencia transmitida y la bombilla brilla más.

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Creator

luigarmo

37 Circuits

Date Created

3 years, 5 months ago

Last Modified

3 years, 5 months ago

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