Magnetic Circuits

This presentation contains basics of Magnetic circuits such as, magnetic flux, flux density, MMF, Reluctance, Magnetization Curve(B-H Curve), Difference between Electric & Magnetic Circuit, Series & Parallel magnetic Circuits etc.

1. Magnetic Circuit Mr. C D Patil Dept. of EE

2. Introduction Magnet- It is the piece of solid substance which has magnetic property. Magnetic Flux- ( φ ) It is defined as the number of  magnetic  field lines passing through a given closed surface.

3. Introduction The magnetic flux density  is the number of lines of force passing through a unit area of material, B. The unit of magnetic induction is the tesla (T). Magnetic field intensity (H) at any point in the magnetic field is defined as the force experienced by the unit north pole at that point. In simple terms, it is a measure of how strong or weak any magnetic field is. The SI unit of magnetic field intensity is Ampere/meter (A/m)

4. Basic Definitions Magneto Motive Force- (MMF)- It is the force due to which causes magnetic flux to flow. Its unit is Ampere- Turns (N-I) Where, N= No. of turns in magnetizing coil I= Current in Amp. Reluctance (S) - It is the opposition to the flow of flux Its unit is Ampere- Turn/ Weber (AT/Weber)

5. Basic Definitions Permeance – It is the reciprocal of Reluctance. Its unit is weber / Ampere- Turns Permeability- It is the ability of material to allows the flow of flux.

6. Series Magnetic Circuit The  Series Magnetic Circuit  is defined as the magnetic circuit having a number of parts of different dimensions and materials carrying the same magnetic field.

7. Parallel Magnetic Circuit A magnetic circuit having two or more than two paths for the magnetic flux is called a parallel magnetic circuit. Its behavior can be compared to the parallel electric circuit. The parallel magnetic circuit contains different dimensional areas and materials having various numbers of paths .

8. Parallel Magnetic Circuit

9. Electric & Magnetic Circuits

10. Magnetization Curve (B-H Curve)

11. Thank You!!!