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Práctica 4 Electrotecnia TEOREMAS DE THÉVENIN Y DE NORTON

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Práctica 4 Electrotecnia TEOREMAS DE THÉVENIN Y DE NORTON

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  • July 31, 2021
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UNIVERSIDAD DE MÁLAGA
GRADO EN INGENIERÍA DE TÉCNICAS INDUSTRIALES


19/11/2020
ELECTROTECNIA MÁLAGA




PRÁCTICA 4
TEOREMAS DE THÉVENIN Y DE NORTON

, ENSAYO 4.1

• ENUNCIADO

Montar el circuito del siguiente esquema y medir:
- Rth entre A – B, cortocircuitando ambas fuentes de tensión y conectando entre
estos un polímero de 20000 cuentas como ohmímetro

- Eth entre A – B, conectando entre estos un polímero de 20000 cuentas como
voltímetro

- IN entre A – B, conectando entre estos un polímero de 2000 cuentas como
amperímetro


• ESQUEMA




• PREPARACIÓN

La preparación en este ensayo consiste en hallar el valor teórico del dipolo de Thévenin,
así como la potencia que consume cada resistencia.

Rth = 3000 Ω // 7000 Ω = 2100 Ω = 2,1 kΩ → alcance de 20 kΩ

Eth = 20 V · 7 kΩ / 10 kΩ + 8 V · 7 kΩ/10 kΩ = 19,6 V → alcance de 20 V

IN = Eth / Rth = 19,6 V / 2100 Ω = 9,33·10-3 A = 9,33 mA → alcance de 20mA

UR2 = UR1 + Ua2 – UR3 = 20 V + 8 V – 19,6 V = 8,4 V

PR1 = 202 V / 100 Ω = 4 W → no supera 5 W

PR2 = 8,42 V / 3000 Ω = 0,02352 W = 23,52 mW → no supera 5 W

PR3 = 19,62 V / 7000 Ω = 0,05488 W = 54,88 mW → no supera 5 W

PCAJA RESIST = 23,52 mW + 54,88 mW = 78,4 mW → no supera 5 W
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