Name: how inductor current stores magnetic energy
Uploaded: 2024-04-11T12:48:39.000Z
Duration: 1 min 16 s
Channel: JoVE

K12 Standards

Texas Essential Knowledge and Skills

High School

Chemistry and Physics

IPC.6

IPC.6.A

Energy Stored in Inductors

Un inductor está diseñado para almacenar energía en su campo magnético, que es generada por la corriente que fluye a través de sus bobinas.
Cuando la corriente es constante, el voltaje a través del inductor es cero, lo que hace que se comporte como un cortocircuito para la corriente continua.
La energía almacenada dentro de un inductor es igual a la integral de la potencia instantánea entregada a lo largo del tiempo.
Al integrarse dentro de los límites, se obtiene una expresión para la energía almacenada que consta de dos términos. El segundo término es cero, considerando la condición inicial en la que no fluyó corriente a través del inductor.
Los inductores ideales no disipan energía, lo que permite que la energía almacenada se recupere más tarde.
Sin embargo, los inductores no ideales exhiben una resistencia de devanado, que se origina en las bobinas del conductor y se presenta en serie con la inductancia.
Aunque esta resistencia del devanado puede provocar la disipación de energía, suele ser tan pequeña que puede descuidarse en escenarios prácticos.
Los inductores no ideales también exhiben capacitancia de devanado atribuible al acoplamiento capacitivo entre las bobinas conductoras. Sin embargo, esta capacitancia del devanado suele ser insignificante, excepto a altas frecuencias.

energía almacenada en inductores

Un inductor está ingeniosamente diseñado para acumular energía dentro de su campo magnético. Este campo es el resultado directo de la corriente que serpentea a través de su estructura enrollada. Cuando esta corriente se mantiene estable, no hay voltaje detectable a través del inductor, lo que lo lleva a imitar el comportamiento de un cortocircuito cuando se enfrenta a corriente continua. En términos de medir la energía almacenada dentro de un inductor, equivale a la integral de la potencia entregada en cada momento individual, toda acumulada durante un período de tiempo específico. Matemáticamente, la energía almacenada en un inductor se expresa como: <img alt="Equation1" src="/files/ftp_upload/15089/15089_PT_Equation_1.svg" style="text-align: center; height: 34px;"> Donde w es la energía almacenada en el inductor, L es la inductancia e i es la corriente que pasa a través del inductor. Los inductores ideales tienen una característica notable: no disipan energía. Este rasgo permite que la energía almacenada en su interior se aproveche en un momento posterior. Sin embargo, este escenario ideal se ve ligeramente estropeado cuando se trata de inductores no ideales. Los inductores no ideales exhiben un fenómeno conocido como resistencia del devanado. Esta resistencia proviene de las bobinas del conductor y se presenta en serie con la inductancia. Si bien esta resistencia del devanado tiene el potencial de contribuir a la disipación de energía, normalmente es tan minúscula que puede pasarse por alto en aplicaciones prácticas. Además, los inductores no ideales también muestran capacitancia de devanado. Esto se debe al acoplamiento capacitivo que se produce entre las bobinas conductoras. Sin embargo, esta capacitancia del devanado suele ser tan pequeña que puede ignorarse, excepto cuando se trata de altas frecuencias.

Energía almacenada en inductores

Un inductor está diseñado para almacenar energía en su campo magnético, que es generada por la corriente que fluye a través de sus bobinas.
Cuando la corriente es constante, ...

Education

Educación

JoVE Core

Electrical Engineering

Ingeniería Eléctrica

Unit 1

Unidad 1

Energy Storage Elements

Elementos de almacenamiento de energía

KEY TERMS AND CONCEPTS

TÉRMINOS Y CONCEPTOS CLAVE

how inductor current stores magnetic energy

An inductor stores energy in its magnetic field. That field is created by the current flowing through the coil. When the current stays steady, there is no measurable voltage across the inductor, so it behaves like a short circuit for direct current.

The energy stored in an inductor is the total power delivered over time. It can be written as a function of inductance, L, and current, i, where the stored energy increases with the current in the coil. This relationship helps explain how much energy is held in the magnetic field at any moment.

Ideal inductors do not lose energy, so the stored energy can be used later. Real inductors are not perfect, though. They may have winding resistance, which comes from the conductor coils and appears in series with the inductance. This resistance can cause some energy loss, but it is usually so small that it can be ignored in practice.

Non-ideal inductors can also have winding capacitance. This comes from capacitive coupling between the conducting coils. In most cases, this effect is very small as well, but it can matter at high frequencies.

How Inductor Current Stores Magnetic Energy

how-inductor-current-stores-magnetic-energy

capacitors

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Inductors are passive components used in electric circuits to store energy in a magnetic field. They are often made by coiling a wire around a magnetic core. This structure gives the component its inductive behavior and its ability to respond to changing current. When current flows through an inductor, the voltage across it is proportional to how quickly the current changes with time. This relationship is written using the passive sign convention, and the constant of proportionality is called...

energy stored in inductors

An inductor stores energy in its magnetic field. That field is created by the current flowing through the coil. When the current stays steady, there is no measurable voltage across the inductor, so it behaves like a short circuit for direct current. The energy stored in an inductor is the total power delivered over time. It can be written as a function of inductance, L, and current, i, where the stored energy increases with the current in the coil. This relationship helps explain how much...

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Learn how current in an inductor’s coil creates a magnetic field, stores energy, and why real inductors can also have winding resistance and capacitance.

How Inductor Current Stores Magnetic Energy | 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.

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How Inductor Current Stores Magnetic Energy

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