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Related Concept Videos

Inductors01:11

Inductors

1.2K
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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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...
6.4K
Inductance: Solid Cylindrical Conductor01:24

Inductance: Solid Cylindrical Conductor

981
To calculate the inductance of a solid cylindrical conductor, consider a 1-meter section of a non-magnetic, current-carrying conductor with radius r. Disregarding end effects and assuming uniform current density, Ampere's law helps determine the magnetic field inside the conductor. This law states that the magnetic field intensity H is concentric and constant within the conductor.
Given the uniform current distribution, the magnetic field Hx and flux density Bx inside the conductor are...
981
Inductor in an AC Circuit01:16

Inductor in an AC Circuit

3.1K
The basic components of an inductor are coils or loops of wire that are either wound around a hollow tube former or a ferromagnetic material (iron-cored) to increase their inductive value or inductance. When a voltage is applied across an inductor's terminals, a magnetic field is created, where the inductor stores its energy. The inductor's own self-induced or back emf value controls the growth of the current flowing through it.  This back emf voltage is proportional to the rate of...
3.1K
Energy Stored in Inductors01:16

Energy Stored in Inductors

1.1K
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.
In terms of gauging the energy stored within an inductor, it is equivalent to the integral of the power delivered at every individual moment, all...
1.1K
Oscillations In An LC Circuit01:30

Oscillations In An LC Circuit

3.3K
An idealized LC circuit of zero resistance can oscillate without any source of emf by shifting the energy stored in the circuit between the electric and magnetic fields. In such an LC circuit, if the capacitor contains a charge q before the switch is closed, then all the energy of the circuit is initially stored in the electric field of the capacitor. This energy is given by
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Related Experiment Video

Updated: Mar 26, 2026

Fabrication Procedures and Birefringence Measurements for Designing Magnetically Responsive Lanthanide Ion Chelating Phospholipid Assemblies
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New C4D Sensor with a Simulated Inductor.

Yingchao Lyu1, Haifeng Ji2, Shijie Yang3

  • 1State Key Laboratory of Industrial Control Technology, College of Control Science and Engineering, Zhejiang University, Hangzhou 310027, China. lychao1990@zju.edu.cn.

Sensors (Basel, Switzerland)
|February 2, 2016
PubMed
Summary
This summary is machine-generated.

A new contactless conductivity detection sensor uses an improved simulated inductor to overcome capacitance issues, achieving accurate measurements below 5% error. This technology enables miniaturization of conductivity sensors.

Keywords:
capacitively coupled contactless conductivity detection (C4D)conductivity measurementcontactless conductivity detection (CCD)series resonancesimulated inductor

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Area of Science:

  • Electrical Engineering
  • Sensor Technology
  • Measurement Science

Background:

  • Contactless conductivity detection (C(4)D) sensors are crucial for non-invasive fluid analysis.
  • Traditional C(4)D sensors face challenges with coupling capacitances and component size.
  • Simulated inductors offer potential for miniaturization and improved performance.

Purpose of the Study:

  • To develop a novel capacitively coupled contactless conductivity detection (C(4)D) sensor.
  • To integrate an improved Riordan-type floating simulated inductor for enhanced performance.
  • To validate the sensor's accuracy and explore its potential for miniaturization.

Main Methods:

  • Design and implementation of an improved simulated inductor.
  • Integration of the simulated inductor into a C(4)D sensor architecture.
  • Conductivity measurement experiments in pipes of varying diameters (3.0, 4.6, 6.4 mm).
  • Analysis of measurement accuracy and comparison with sensors using practical inductors.

Main Results:

  • Successful design and implementation of the new C(4)D sensor and improved simulated inductor.
  • Conductivity measurements achieved with a maximum relative error of less than 5%.
  • Comparable measurement accuracy to C(4)D sensors utilizing practical inductors.
  • Demonstrated adjustability of the simulated inductor, reducing AC source requirements and ensuring interchangeability.

Conclusions:

  • The developed C(4)D sensor with an improved simulated inductor is effective for accurate conductivity measurements.
  • The simulated inductor technique overcomes coupling capacitance issues and facilitates sensor miniaturization.
  • Stable potential at one terminal of the simulated inductor is recommended for enhanced running stability.
  • This research validates the feasibility of miniaturized C(4)D sensors, paving the way for future advancements.