Friday, 15 March 2024

Types Of Induction Motors | Operating Principle Of Induction Motors

Types Of Induction Motors | Operating Principle Of Induction Motors.

Assembly Or Spare Parts Of An Induction Motor Are Shown In Image Below:


The Most Widely Used Electrical Motor, Known As An Induction Motor, Is Utilized In The Majority Of Applications. Because It Operates At A Speed Lower Than Synchronous Speed, This Motor Is Also Known As An Asynchronous Motor. We Must Specify What Synchronous Speed Is In This. The Frequency And Number Poles Of The Machine Determine The Synchronous Speed, Which Is The Rate At Which The Magnetic Field Rotates In A Rotating Machine.

An Induction Motor Never Reaches Its Synchronous Speed Because The Flux Generated By The Rotating Magnetic Field In The Stator Causes The Rotor To Rotate. However, Because The Rotor's Flux Current Lags Behind That Of The Stator's, The Rotor Will Never Reach The Synchronous Speed Caused By The Rotating Magnetic Field. Single Phase Induction Motors And Three Phase Induction Motors Are The Two Main Types Of Induction Motors That Rely On The Input Supply. 

Three Phase Induction Motors Are Self-starting, Although Single Phase Induction Motors Are Not; We Will Talk About Them Later. Currently, In Order To Get A Machine To Rotate, We Generally Need To Provide Two Supplies, Or Double Stimulation. If We Take A Dc Motor As An Example, We Would Use Brush Arrangement To Provide One Supply To The Rotor And Another To The Stator.

Principle Of Operation Of An Induction Motor: 

One Example Of An Electromechanical Device That Transforms Electrical Energy Into Mechanical Energy Is An Electrical Motor. Three Phase Induction Motors Are The Most Commonly Utilized Motors When Operating In Three Phases Of Ac Power. This Is Because These Motors Are Self-starting, Meaning They Don't Need A Starting Mechanism.

We Need To Be Aware Of The Fundamental Constructional Elements Of This Motor In Order To Comprehend The Three Phase Induction Motor Idea More Fully. There Are Two Main Components To This Motor:

Stator: The Number Of Slots In The Stator Of A Three-phase Induction Motor Is Used To Build A Three-phase Winding Circuit, Which Is Connected To A Three-phase Ac Supply. When Ac Is Applied To The Three Phase Windings, Their Arrangement Inside The Slots Causes Them To Generate A Revolving Magnetic Field.

Rotor: The Cylindrical Laminated Core Of A Three-phase Induction Motor Includes Parallel Slots That Can Hold Conductors. The End Rings Short Circuit The Heavy Copper Or Aluminum Bars That Serve As Conductors And Fit Into Each Slot. The Slots Are Somewhat Skewed Rather Than Perfectly Parallel To The Shaft's Axis Because This Configuration Can Prevent Motor Stalling And Lessen Magnetic Humming Noise.

Operation Of The Three-phase Induction Vehicle
Creation Of A Magnetic Field Rotating:

The Motor's Stator Is Made Up Of Overlapping Windings Spaced 120 Degrees Apart Electrically. A Synchronous Magnetic Field Is Created When The Stator Or Primary Winding Is Linked To A Three-phase Ac Source. This Magnetic Field Rotates At That Speed.

Secrets Associated With The Rotation:

An Electromagnetic Field (EMF) Is Created In Any Circuit By The Rate At Which Magnetic Flux Linkage Changes Along The Circuit, As Stated By Faraday's Law. An Induction Motor Induces An Electromagnetic Field (EMF) In The Rotor Copper Bar When The Rotor Windings Are Closed By An External Resistance Or Directly Shorted By The End Ring, Cutting The Stator Spinning Magnetic Field. 

This Generated EMF Causes A Current To Flow Through The Rotor Conductor.

Here, The Source Of The Electric Current Production Is The Relative Velocity Between The Revolving Flux And The Static Rotor Conductor.

Therefore, In Accordance With Lenz's Law, The Rotor Will Revolve In The Same Direction To Lessen The Cause, Or The Relative Velocity.

Therefore, It Can Be Seen From The Three Phase Induction Motor's Operating Principle That The Rotor Speed Shouldn't Exceed The Synchronous Speed That The Stator Produces. 

If The Speeds Were Equal, There Wouldn't Be Any Relative Velocity, Which Means The Rotor Wouldn't Experience An Electromagnetic Field Induction Or Flow Of Current, Which Would Prevent The Generation Of Torque. 

As A Result, The Rotor Is Unable To Spin At Synchronous Speed. The Term "Slip" Refers To The Variation In Rotor And Stator Speeds (Synchronous Speed). 

An Induction Motor's Rotating Magnetic Field Has The Benefit Of Not Requiring Any Electrical Connections To Be Established To The Rotor.

The Three-phase Induction Motor Is Therefore:

• Autonomous.

• Because There Are No Commutators Or Spark-prone Brushes Present, There Is Less Armature Reaction And Brush Sparking.

• Sturdily Constructed.

• Cost-effective.

• Simpler To Keep Up.

However, We Only Provide One Supply For Induction Motors, So Understanding How They Operate Is Fascinating. It's Fairly Straightforward; The Name Itself Makes It Clear That An Induction Procedure Has Taken Place. Actually, Because Of The Current Flowing Through The Coil, Flux Will Develop When The Stator Winding Receives A Supply.

The Way The Rotor Winding Is Now Configured Causes It To Short Circuit Inside The Rotor. According To Faraday's Law Of Electromagnetic Induction, The Rotor Coil Will Be Cut By The Stator Flux, And Since The Rotor Coils Are Short Circuited, Electric Current Will Begin To Flow In The Rotor Coil. Another Flux Will Be Produced In The Rotor When The Current Flows.

There Are Now Going To Be Two Fluxes: The Rotor Flow And The Stator Flux, With The Rotor Flux Behind The Stator Flux. As A Result, The Rotor Will Experience A Torque That Causes It To Revolve In The Direction Of The Magnetic Flux. Hence, The Rotor's Speed Will Be Determined By The Ac Supply, And It Can Be Adjusted By Changing The Input Supply. Any Kind Of Induction Motor Operates On This Basis.

Attention:-
Kindly Note That To View More Jobs Post , You Can Also Click On The Arrow "Right/Older Post" Or "Left/Pervious Post " Next To "HOME" Icons.

No comments:

Post a Comment

Subscribe to: Post Comments (Atom)