Optimal Hysteresis Loop Shapes for Permanent Magnets and Transformer Cores

In summary, the conversation discusses the required hysteresis loop shape for a magnetic material to be used in a permanent magnet and a transformer core. The shape should have B not returning to zero when H does, and the area under the B-H curve represents the energy lost. References to Wikipedia and a magnetic core website are also mentioned.
  • #1
KingBigness
96
0

Homework Statement


What hysteresis loop shape would you require for a magnetic material to be used in

A) a permanent magnet
B) transformer core

The Attempt at a Solution



No idea what this means...but it is for my lab tomorrow so I probably should.

Any help would be greatly appreciated,
 
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  • #2
Think of a B-H hysteresis loop and how B does not return to zero when H does (remebering that H is prportional to applied current). Would that work to make a permanent magnet?

Then recall that the area under the B-H curve represents energy lost. Would that be a good material for a transformer core?

cf. wikipedia/wiki/magnetic_core.com
 

Related to Optimal Hysteresis Loop Shapes for Permanent Magnets and Transformer Cores

1. What is a hysteresis loop?

A hysteresis loop is a graphical representation of the relationship between the magnetic field strength and the magnetic flux density of a material. It shows how the material responds to changes in the magnetic field, and is commonly used to characterize the magnetic properties of permanent magnets and transformer cores.

2. Why is it important to optimize the hysteresis loop shape?

The hysteresis loop shape directly impacts the performance and efficiency of permanent magnets and transformer cores. By optimizing the loop shape, we can improve the magnetic properties and reduce energy losses, leading to better overall performance.

3. How do you determine the optimal hysteresis loop shape?

There are various methods and techniques used to determine the optimal hysteresis loop shape, including analytical calculations, numerical simulations, and experimental testing. These methods take into consideration factors such as material properties, operating conditions, and desired performance metrics.

4. What are some common types of hysteresis loop shapes?

Some common types of hysteresis loop shapes include rectangular, trapezoidal, elliptical, and sinusoidal. Each shape has its own unique characteristics and is suitable for different applications. The optimal shape will depend on the specific requirements and constraints of the magnet or transformer.

5. How does hysteresis affect the performance of permanent magnets and transformer cores?

Hysteresis is the phenomenon where the magnetic properties of a material lag behind changes in the magnetic field. This can result in energy losses, reduced efficiency, and changes in performance over time. By optimizing the hysteresis loop shape, we can minimize these effects and improve the overall performance of the magnet or transformer core.

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