• Latest
  • Trending
  • All
  • Capacitors
  • Resistors
  • Inductors
  • Filters
  • Fuses
  • Non-linear Passives
  • Applications
  • Integrated Passives
  • Oscillators
  • Passive Sensors
  • New Technologies
  • Aerospace & Defence
  • Automotive
  • Industrial
  • Market & Supply Chain
  • Medical
  • RF & Microwave
  • Telecommunication

Magnetic Induction, Magnetic Flux and Faraday’s Law

10.2.2022

Vishay NTC Thermistor LTspice Simulation for PID Optimization; Vishay Webinar

21.5.2022

Coverlay – More than a Flexible Soldermask Substitute; WE Webinar

19.5.2022

Stackpole Presents High Current Metal Shunt Resistors

19.5.2022

Coilcraft Introduced Ultra-Low Loss Shielded Power Inductors

19.5.2022
  • Home
  • Privacy Policy
  • EPCI Advertisement & Membership
  • About
No Result
View All Result
NEWSLETTER
Passive Components Blog
  • Home
  • NewsFilter
    • All
    • Aerospace & Defence
    • Antenna
    • Applications
    • Automotive
    • Capacitors
    • Filters
    • Fuses
    • Inductors
    • Industrial
    • Integrated Passives
    • Market & Supply Chain
    • Medical
    • New Materials & Supply
    • New Technologies
    • Non-linear Passives
    • Oscillators
    • Passive Sensors
    • Resistors
    • RF & Microwave
    • Telecommunication

    Vishay NTC Thermistor LTspice Simulation for PID Optimization; Vishay Webinar

    Stackpole Presents High Current Metal Shunt Resistors

    Coilcraft Introduced Ultra-Low Loss Shielded Power Inductors

    Panasonic Releases SMD Automotive Power Choke Coil

    GAM Introduces Tantalum and Niobium Powders for Cold Spray Applications

    Skeleton Curved Graphene Scientists Named as European Inventor Award 2022 Finalists

    Flexible Cable Supercapacitor Application in EVs and HEVs

    Snubber Capacitor Selection for SiC-Based Switching Converters

    Vishay Releases High Precision Compact Thin Film Wraparound Chip Resistor 

    Trending Tags

    • Ripple Current
    • RF
    • Leakage Current
    • Tantalum vs Ceramic
    • Snubber
    • Low ESR
    • Feedthrough
    • Derating
    • Dielectric Constant
    • New Products
    • Market Reports
  • VideoFilter
    • All
    • Antenna videos
    • Capacitor videos
    • Filter videos
    • Fuse videos
    • Inductor videos
    • Non-linear passives videos
    • Oscillator videos
    • Passive sensors videos
    • Resistor videos
    • Sensors

    Vishay NTC Thermistor LTspice Simulation for PID Optimization; Vishay Webinar

    Coverlay – More than a Flexible Soldermask Substitute; WE Webinar

    Soldering THT Components by SMD Reflow Assembly; WE Webinar

    Strain Gage Resistive Sensor Simulation; Vishay Video

    EMC Filters Explained – from Component to Design; WE Webinar

    How to Avoid EMI Noise on Data Cable by Isolated Power Module; WE askLorandt Video

    Introduction to Wireless Power Transfer; WE Webinar

    How to Pass Conducted Emissions Using Line Filters; WE Webinar

    EMI Debugging of a Low Power Buck Converter; WE Webinar

    Trending Tags

    • Capacitors explained
    • Inductors explained
    • Resistors explained
    • Filters explained
    • Application Video Guidelines
    • EMC
    • New Products
    • Ripple Current
    • Simulation
    • Tantalum vs Ceramic
  • Knowledge Blog
  • Preferred Suppliers
  • Who is Who
  • Events
  • Home
  • NewsFilter
    • All
    • Aerospace & Defence
    • Antenna
    • Applications
    • Automotive
    • Capacitors
    • Filters
    • Fuses
    • Inductors
    • Industrial
    • Integrated Passives
    • Market & Supply Chain
    • Medical
    • New Materials & Supply
    • New Technologies
    • Non-linear Passives
    • Oscillators
    • Passive Sensors
    • Resistors
    • RF & Microwave
    • Telecommunication

    Vishay NTC Thermistor LTspice Simulation for PID Optimization; Vishay Webinar

    Stackpole Presents High Current Metal Shunt Resistors

    Coilcraft Introduced Ultra-Low Loss Shielded Power Inductors

    Panasonic Releases SMD Automotive Power Choke Coil

    GAM Introduces Tantalum and Niobium Powders for Cold Spray Applications

    Skeleton Curved Graphene Scientists Named as European Inventor Award 2022 Finalists

    Flexible Cable Supercapacitor Application in EVs and HEVs

    Snubber Capacitor Selection for SiC-Based Switching Converters

    Vishay Releases High Precision Compact Thin Film Wraparound Chip Resistor 

    Trending Tags

    • Ripple Current
    • RF
    • Leakage Current
    • Tantalum vs Ceramic
    • Snubber
    • Low ESR
    • Feedthrough
    • Derating
    • Dielectric Constant
    • New Products
    • Market Reports
  • VideoFilter
    • All
    • Antenna videos
    • Capacitor videos
    • Filter videos
    • Fuse videos
    • Inductor videos
    • Non-linear passives videos
    • Oscillator videos
    • Passive sensors videos
    • Resistor videos
    • Sensors

    Vishay NTC Thermistor LTspice Simulation for PID Optimization; Vishay Webinar

    Coverlay – More than a Flexible Soldermask Substitute; WE Webinar

    Soldering THT Components by SMD Reflow Assembly; WE Webinar

    Strain Gage Resistive Sensor Simulation; Vishay Video

    EMC Filters Explained – from Component to Design; WE Webinar

    How to Avoid EMI Noise on Data Cable by Isolated Power Module; WE askLorandt Video

    Introduction to Wireless Power Transfer; WE Webinar

    How to Pass Conducted Emissions Using Line Filters; WE Webinar

    EMI Debugging of a Low Power Buck Converter; WE Webinar

    Trending Tags

    • Capacitors explained
    • Inductors explained
    • Resistors explained
    • Filters explained
    • Application Video Guidelines
    • EMC
    • New Products
    • Ripple Current
    • Simulation
    • Tantalum vs Ceramic
  • Knowledge Blog
  • Preferred Suppliers
  • Who is Who
  • Events
No Result
View All Result
Passive Components Blog
No Result
View All Result

Magnetic Induction, Magnetic Flux and Faraday’s Law

10.2.2022
Reading Time: 6 mins read
0 0
0
SHARES
1.7k
VIEWS

The article defines the other basic principles of magnetism, magnetic and inductor components – Magnetic Induction, Magnetic Flux and Faraday’s Law.

Magnetic induction B

A potential is induced in a conductor loop if the magnetic field passing through the conductor loop changes with time.

RelatedPosts

Filters and RF Inductors

Storage Chokes and Power Inductors

SMD Inductors

The surge in potential over the area of the loop is known as the magnetic induction B. Like the magnetic field strength, the magnetic induction B is a vector quantity.

The following relationship applies for the magnetic induction B:

magnetic induction equation [1]

The magnetic induction (B) is the quotient of the induced potential surge:

potential induced magnetic surge [2]

and the product of the winding turns (N) and the windings area (A) of the induction coil.

The unit of magnetic induction (B) is the Tesla (T) = Vs/m2.

The magnetic induction B and the field strength H are proportional to one another. The constant of proportionality is the magnetic field constant (μ0), given by experimental measurement.

magnetic field constant [3]

In vacuum and also with sufficient accuracy for air, this leads to:

magnetic induction equation [4]

The magnetic induction (BL) in air for the above example is then given by:

magnetic induction in air environment [5]

Magnetic Flux F

The magnetic flux (F) is the scalar product of the magnetic flux density (B) and the area vector (dA).

magnetic flux equation [6]


If (B) passes perpendicular through the area and the field is homogeneous:

magnetic flux equation in homogeneous field [7]


The unit of magnetic flux (F) is the same as that of the voltage surge (Vs) (Voltsecond) or Weber (Wb).

Faraday’s law

Up until now we have considered static magnetic fields. If the magnetic flux changes with time, a voltage U is induced (Faraday’s law).

induced voltage Faradys Law [8]

U = induced voltage
t = time

The polarity of the voltage is such that a current is generated on closing a circuit whose induced magnetic field opposes the original magnetic flux, i.e. it tends to reduce the magnetic field (Lenz’s rule – Figure 1.).

Figure 1. Representation of Lenz’s rule. The imposed magnetic field induces a current in the direction such that its induced magnetic field opposes the imposed field

Taking a winding with N turns, Faraday’s law can be expressed in the following form.

Faraday law with N turns winding [9]

A = cross section of the coil
l = length of the coil or of the magnetic circuit
I = current through the coil
L = inductance of the coil [H(enry) = Vs/A]

So the inductance limits the change in current once a voltage is applied. It can be calculated from the coil data:

coil inductance equation [10]

AL = AL value; mostly in nH/N2

The energy stored in the magnetic field is subject to the following relationships:

energy stored in magnetic field equation [11]


The energy stored in the volume V is composed of both the magnetic field strength H and the magnet flux density B. For transformers and chokes with ferromagnetic cores, the flux density is limited by saturation and is constant throughout the magnetic circuit. If an air gap is introduced (material with permeability μ~1), the field strength is highest in this air gap with H = B/μ. It follows that the energy density is highest in the air gap. One also speaks of the energy being stored in the air gap.

Related Posts

Applications e-Blog

Vishay NTC Thermistor LTspice Simulation for PID Optimization; Vishay Webinar

21.5.2022
29
Applications e-Blog

Coverlay – More than a Flexible Soldermask Substitute; WE Webinar

19.5.2022
9
Aerospace & Defence

Coilcraft Introduced Ultra-Low Loss Shielded Power Inductors

19.5.2022
14

Popular Posts

  • Capacitor Selection for Coupling and Decoupling Applications

    28 shares
    Share 28 Tweet 0
  • Dielectric Constant and its Effects on the Properties of a Capacitor

    7 shares
    Share 7 Tweet 0
  • Why Low ESR Matters in Capacitor Design

    0 shares
    Share 0 Tweet 0
  • How to Choose the Right Inductor for DC-DC Buck Applications

    0 shares
    Share 0 Tweet 0
  • What is a Dielectric Constant of Plastic Materials ?

    4 shares
    Share 4 Tweet 0

Newsletter Subscription

 

  • Home
  • Privacy Policy
  • EPCI Advertisement & Membership
  • About

© 2021 EPCI - Premium Passive Components Educational and Information Site

No Result
View All Result
  • Home
  • News
  • Video
  • Knowledge Blog
  • Preferred Suppliers
  • Events

© 2021 EPCI - Premium Passive Components Educational and Information Site

Welcome Back!

Login to your account below

Forgotten Password?

Retrieve your password

Please enter your username or email address to reset your password.

Log In
This website uses cookies. By continuing to use this website you are giving consent to cookies being used. Visit our Privacy and Cookie Policy.