Electromagnetic

 Purpose of electromagnetic: is branch of physic that study the relationship

 between electricity and magnetism and how electrical charge produce electric 

In the field of  electrical technology we

often spend our day calculator voltage drop and sizing

 conductor or trouble shooting , circuit breaker it is easy to get lost in the hard Ware , how ever if you

 stop away the insulation and the copper you find that the entire in industrial is built upon a single foundation module of the universe 

      ".  Electromagnetism"

For any electrical technologist , electromagnetism is More than physic concept , it is the function

 interface between energy and work it's invirseble force that that allows us to generate the power  in the valley and use it light skyscraper 500 miles away 

The generations module : faraday's legacy 

The story electrical technology begin with : electromagnetic induction : this is the process using magnetic field to create electrical current  in almost every power plant on earth whether it is use wind , water , or stream the core technology is the generator

Inside the generator we use mechanic energy to spin a rotor ( a set of magnetic 🧲 ) inside stators

 

Stationary coil of copper wire as the 🧲  line of flux

Cut through the copper conductor  they push ' electronic create electronic , create electromotive force (EMF) this is generation module 

Of the Grobal grid we are not actually creating energy we are using electromagnetic field as medium to convert mechanic motion into flow of charge 

The transformation module : efficiency at scale 

Once electrical is generated: we face the challenges of transmission . If we sent electricity  over long

 distances at low voltage the resistance in the wire

Would turn all that energy into useless  heat 

 This is  where the transformation come in device

That is purely  electromagnetic 

 Transformer : Has no moving part  it is relies on principle  called mature induction 

When alternative current ( AC) flows through primary primary coils , it create constantly changing magnetic field in the iron core 

This field  then " induces" voltage in the second coil by changing the ratio of wire turn between two coil

We can step up voltage for efficient travel or step down for safe home use without this electromagnetic ' module ' our modern  centralized 

Power grid would be physical  impossible 

      The motor : converting field to force

If the generator is the heart of the electrical world motor  is muscle while faraday show us how's  to turn motion into electricity . The Lorentz force law

 Explain 

The reverse in an industrial setting over 60% of all generated power is consumer by motor . This is the motor effective when electrical current pass through magnetic field is experience physical force

Through magnetic field it experience physical force 

Inside  a three phases induction motor we see the most elegant application of  electromagnetism we provide power to the stationary coil ( stator coils) 

 Which create Rotating magnetic field 

This field literally " drags" the rotor a long with it the is no physical connection no gear , no belts  inside of housing only invisible tether of magnetic flux for technologist understandings this " slip" and torque is Vital whether it is massive 500 HP pump precision servo we are simply modulating electromagnetic strength dictate physical work 

            Managing magnetic inertia 

As technologist you just don't build circuit you protect them, this requires understanding inductance when current pass through a conductor the magnetic field actually creating oppose any changes in that current lenz's law's 

The electromagnetic " stubborn is why's we see massive inrush current when we starting motor 

This is also the principal  behind the circuit you protect them this requires understanding"  the inside of the breaker  is small electromagnetic coil 

If short circuit occur the massive spike in current create a magnetic field strong enough to instantly 

Pull trip function our copper conductor  would melt long before we could react  to fault 

                   Seeing invisible 

Perhaps the most participle application for modern electrician is non contact testing when we are use clamp meter to measure Ampere you not breaking 

Circuit or touch live wire instantly"  jaws" of you meter act as transform core  capturing magnetic field radiating from the conductor converting it  into digitally reading 

Similar when you trouble shooting a human transformers , you are hearing the physical vibration of the iron lamination are the expanding 

Contract  60 minute per second due to magnets Ric toon to untrained eyes , cable is just pressurized pipe of electromagnetic potential