Name: norton current in ac circuit analysis
Uploaded: 2024-04-11T12:48:50.000Z
Duration: 1 min 16 s
Channel: JoVE

O teorema de Norton afirma que qualquer rede linear de dois terminais pode ser substituída por um circuito equivalente que consiste em uma fonte de corrente constante em paralelo com uma impedância.
Para determinar o valor da impedância paralela, a fonte é substituída por sua impedância interna. A impedância equivalente deste circuito resultante é a impedância de Norton, que é a mesma que a impedância de Thévenin.
Para determinar a corrente de Norton, coloque as fontes novamente no circuito e analise a tensão de circuito aberto, que é a tensão de Thévenin.
A tensão de Thévenin é determinada pelo produto da corrente da fonte e pela impedância de Thevenin.
A mesma tensão é descartada através da impedância de carga à medida que é colocada em uma configuração paralela.
Lembre-se da relação entre a corrente de Norton, a tensão de Thévenin e a impedância de Thévenin. Ao substituir os valores, permite a determinação da corrente de Norton.
O teorema de Norton é benéfico para analisar e projetar sistemas contendo circuitos CA complexos.
Ao determinar o circuito equivalente de Norton para cada estágio ou seção do circuito complexo, a análise do sistema geral pode ser simplificada.

circuitos equivalentes de norton

O teorema de Norton é um conceito fundamental no campo da engenharia elétrica que permite a simplificação de circuitos AC complexos. O teorema afirma que qualquer rede linear de dois terminais pode ser substituída por um circuito equivalente que consiste em uma impedância paralela a uma fonte de corrente constante. A Figura 1 mostra o circuito AC dividido em duas partes: Circuito A e Circuito B, enquanto a Figura 2 mostra o circuito obtido substituindo o Circuito A pelo seu circuito equivalente Norton.

<img alt="Figure1" src="/files/ftp_upload/15114/15114_PT_Figure_1.svg" style="text-align: center; height: 160px;" />

Figura 1: Um circuito dividido em duas partes

<img alt="Figure2" src="/files/ftp_upload/15114/15114_PT_Figure_2.svg" style="text-align: center; height: 160px;" />

Figura 2: Circuito equivalente Norton

Para calcular o valor da impedância paralela, deve-se substituir a fonte pela sua impedância interna, resultando em um circuito com impedância equivalente conhecida como impedância de Norton. A impedância de Norton é igual à impedância de Thévenin e é usada para determinar a corrente de Norton, que é a corrente que flui através do circuito.

Determinar a corrente de Norton requer colocar as fontes de volta no circuito e analisar a tensão de circuito aberto, também conhecida como tensão de Thévenin. O valor da tensão de Thévenin é determinado multiplicando a corrente da fonte pela impedância de Thevenin e é usado para diminuir a mesma tensão através da impedância de carga quando ela é colocada em uma configuração paralela.

Usando a relação entre a corrente de Norton, a tensão de Thévenin e os valores da corrente de Norton, pode-se determinar a corrente de Norton do circuito. Esta relação torna o teorema de Norton benéfico para analisar e projetar sistemas contendo circuitos AC complexos, uma vez que simplifica sua análise ao dividir o circuito em seções menores e mais gerenciáveis.

Circuitos Equivalentes de Norton

O teorema de Norton afirma que qualquer rede linear de dois terminais pode ser substituída por um circuito equivalente que consiste em uma fonte de corrente constante em ...

Education

JoVE Core

Electrical Engineering

Engenharia Elétrica

Unit 1

Unidade 1

AC Circuit Analysis

Análise de Circuitos CA

KEY TERMS AND CONCEPTS

TERMOS E CONCEITOS-CHAVE

Norton Equivalent Circuits

norton current in ac circuit analysis

Norton’s theorem helps simplify complex AC circuits by replacing a two-terminal linear network with a smaller equivalent circuit. That equivalent circuit uses an impedance in parallel with a constant current source. The method lets students break one complicated circuit into two parts and analyze them more easily.

To build the Norton equivalent, the source is replaced by its internal impedance. The result is the Norton impedance, which is the same as the Thévenin impedance. This parallel impedance is the key value used in the equivalent circuit.

Finding the Norton current takes one more step. The sources are placed back into the circuit, and the open-circuit voltage is analyzed. That voltage is also called the Thévenin voltage, and it can be found by multiplying the source current by the Thévenin impedance.

The Thévenin voltage helps show the same voltage drop across the load impedance when the load is arranged in parallel. Using the relationship between the Norton current, the Thévenin voltage, and the Norton impedance makes it possible to determine the circuit current. This makes Norton’s theorem useful for analyzing and designing systems with complex AC circuits because it turns a hard problem into smaller, more manageable parts.

Norton Current in AC Circuit Analysis

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Learn how Norton’s theorem simplifies complex AC circuits with a parallel current source and impedance, and how Norton current is determined from Thévenin values.

Norton Current in AC Circuit Analysis | JoVE K12

JoVE Core Electrical Engineering offers easy-to-understand animated videos that cover fundamental concepts of electric circuits along with circuit analysis techniques. It incorporates first-order and second-order circuits using operational amplifiers and circuit transformation concepts. The inclusion of practical design examples and real-world applications through scientist-in-action videos adds significant educational value, making complex concepts accessible.

electrical engineering

Norton Current in AC Circuit Analysis

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