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Related Concept Videos

Inductors01:20

Inductors

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An inductor, also known as a choke, is a circuit component created to have a specific inductance. Inductors are among the crucial circuit components used in modern electronics, along with resistors and capacitors. They serve as a barrier against changes in a circuit's current. An inductor tends to suppress current changes in an alternating-current circuit that are faster than desired. In a direct-current circuit, an inductor aids in preserving a constant current despite changes in the...
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Inductors01:11

Inductors

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An inductor is a passive component built to store energy within its magnetic field. It can be fabricated by coiling a wire around a magnetic core. When current is permitted to flow through this inductor, it is observed that the voltage across the inductor is directly proportional to the time rate of change of the current. Mathematically,
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Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...
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Energy Stored in Inductors01:16

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An inductor is ingeniously crafted to accumulate energy within its magnetic field. This field is a direct result of the current that meanders through its coiled structure. When this current maintains a steady state, there is no detectable voltage across the inductor, prompting it to mimic the behavior of a short circuit when faced with direct current.
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Magnetic Damping01:17

Magnetic Damping

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Eddy currents can produce significant drag on motion, called magnetic damping. For instance, when a metallic pendulum bob swings between the poles of a strong magnet, significant drag acts on the bob as it enters and leaves the field, quickly damping the motion.
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Eddy Currents01:25

Eddy Currents

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Since eddy currents occur only in conductors, magnets can separate metals from other materials. For example, in a recycling center, trash is dumped in batches down a ramp, beneath which lies a powerful magnet. Conductors in the trash are slowed by eddy currents, while nonmetals in the trash move on, separating from the metals. This works for all metals, not just ferromagnetic ones.
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Micropatterned Magneto-Rheological Elastomers to Drive Changes in Cardiomyocyte Alignment
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Magnetic elastomers for stretchable inductors.

Nathan Lazarus1, Chris D Meyer1, Sarah S Bedair1

  • 1†U.S. Army Research Laboratory, 2800 Powder Mill Road, Adelphi, Maryland 20783, United States.

ACS Applied Materials & Interfaces
|May 7, 2015
PubMed
Summary
This summary is machine-generated.

Researchers developed a new magnetic composite for stretchable electronics. This soft magnetic material significantly boosts inductor performance, increasing permeability and inductance density by 200% while maintaining flexibility.

Keywords:
composite materialsinductorsmagnetic materialsstretchable electronics

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Area of Science:

  • Materials Science
  • Electrical Engineering
  • Soft Robotics

Background:

  • Developing stretchable electronic components requires materials that combine mechanical flexibility with desirable electromagnetic properties.
  • Magnetic composites offer a route to enhance inductance density in wearable and flexible devices.

Purpose of the Study:

  • To investigate silicone-based magnetic composites for enhanced permeability and stretchability.
  • To demonstrate the first magnetic-core stretchable inductors and liquid metal inductors on ferroelastomeric cores.

Main Methods:

  • Characterization of magnetic and mechanical properties of silicone composites with spherical and platelet magnetic particles.
  • Fabrication and testing of stretchable inductors using the developed ferroelastomer.
  • Integration of liquid metal (Galinstan) inductors around the ferroelastomeric core.

Main Results:

  • Silicone composites with magnetic particles demonstrated increased core permeability.
  • The ferroelastomeric core enabled the creation of the first magnetic-core stretchable inductors.
  • Liquid metal inductors on ferroelastomeric cores withstood uniaxial strains up to 100%.
  • Soft magnetic elastomers increased core permeability and inductance density of stretchable inductors by approximately 200%.

Conclusions:

  • Magnetic particle-loaded elastomers are effective for creating high-performance stretchable inductors.
  • The developed ferroelastomers maintain mechanical integrity under significant strain, suitable for dynamic applications.
  • This work advances the design of flexible and wearable electronic devices with enhanced inductive capabilities.