Lecture 2 Magnetic Circuit
2 likes267 views
The document is a set of lecture notes by Prof. Suraj T. Jadhav from CSMSS College of Polytechnic, covering types of magnetic circuits including series and parallel configurations. It explains the components, calculations of magnetomotive force (MMF), and reluctance in both circuit types. The notes also hint at a forthcoming topic on electromagnetic induction.
Lecture 2 Magnetic Circuit
- 1. Lecturer CSMSS college of polytechnic, A u r a n g a b a d ( M a h a r a s h t r a ) E ma i l i d : s u r a j j a d h a v 7 3 7 5 @ g ma i l . c o m I n s t a g r a m I d : s u r a j _ j a d h a v _ a c a d e my Yo u Tu b e C h a n n e l : S J A c a d e my Prof. Suraj T. Jadhav Magnetic Circuit Prof. Suraj T. Jadhav Lecture 2-1
- 2. Types of Magnetic Circuit Magnetic Circuit Prof. Suraj T. Jadhav Lecture 2-2
- 3. Series Magnetic circuit: It consist of 3 parts namely A,B & C Length of these parts l1, l2 & l3 Area of cross section a1, a2 & a3 Relative permeability µr1 µr2 & µr3 The coil having N no. of turns and that coil wound on one of the part and current I is flowing through it Due to current, MMF is produced and expressed by MMF=N×I AT The MMF produces the flux Φ, which is same for all three parts of magnetic circuit and the value of flux across all three parts is same so the circuit is Series magnetic circuit. S1,S2&S3 are three reluctances of three parts, expressed by S1= 𝑙1 𝜇0𝜇𝑟1𝑎1 , S2= 𝑙2 𝜇0𝜇𝑟2𝑎2 & S3= 𝑙3 𝜇0𝜇𝑟3𝑎3 Magnetic Circuit Prof. Suraj T. Jadhav Lecture 2-3
- 4. Parallel Magnetic Circuit The circuit which consist of more than 1 path for Flux is known as Parallel Magnetic circuit In this type of circuit reluctances are in parallel. The coil has N no. of turns placed on central limb of the core and current I is flowing through the coil. Due to this current, flux Ø is developed in the central limb of the core. At A point in the circuit there will be two paths for flux namely ABCA and ADCA. This type of flux division is similar to current division in Parallel electrical circuits. Expression for reluctance S= 𝟏 𝑺𝟏 + 𝟏 𝑺𝟐 + 𝟏 𝑺𝟑 + ⋯ Φ=Φ1+Φ2 Magnetic Circuit Prof. Suraj T. Jadhav Lecture 2-4
- 5. NEXT VIDEO WILL BE ON “ELECTROMAGNETIC INDUCTION” STAY TUNE ON SJ ACADEMY Thank You Magnetic Circuit Prof. Suraj T. Jadhav Lecture 2-5