What is the magnetization curve effect?

What is the magnetization curve effect?

: a graph representing changes in the condition of a magnetizable substance with magnetizing force H as abscissa and either magnetization I or induction B as ordinate.

What are the factors affecting the shape and size of hysteresis loop?

Factors Affecting Hysteresis Loss At different values of ‘B’, different materials can saturate, so the loop height will be affected. This loop mainly depends on the material nature. The loop size, as well as shape, mainly depends on the first position of the specimen.

What is the plot of magnetization curve?

A plot of B versus H is called a magnetization curve (B–H curve) and is shown in Fig. 7. The term μI is the initial permeability of the material obtained from initial slope. When the magnetizing field H is increased, the ratio B/H also increases until a maximum value is reached.

What is the importance of magnetization curve?

The magnetization curve is also called B-H curve is responsible to examine how the material reacts to an external magnetic field and helps to provide vital information while designing magnetic circuits.

What causes magnetic hysteresis in ferromagnetic materials?

The phenomenon of hysteresis in ferromagnetic materials is the result of two effects: rotation of magnetization and changes in size or number of magnetic domains. In general, the magnetization varies (in direction but not magnitude) across a magnet, but in sufficiently small magnets, it doesn’t.

What are the factors affecting the size of rotating machines?

Explanation: There are 2 factors that affect the size of rotating machines. They are speed of the machines and the output coefficient of the machines.

What are the factors affecting the hysteresis loss?

Hysteresis loss is caused by the magnetization and demagnetization of the core as current flows in the forward and reverse directions. As the magnetizing force (current) increases, the magnetic flux increases.

What indicates the shape of BH curve of material?

A B-H curve plots changes in a magnetic circuit’s flux density as the magnetic field strength is gradually increased. The resulting shape indicates how the flux density increases due to the gradual alignment of the magnetic domains (atoms, that behave like tiny magnets) within the magnetic circuit material.

Why does the magnetization curve start above the origin?

This curve starts from a point which is slightly higher than the origin representing that there is some flux produced by the field poles even no current is passed through the field windings.

What indicates the shape of a BH curve of material?

Why does the magnetization curve of a DC generator Bend?

A small increase in magnetism requires very large field current above the saturation point. That is why upper portion of the curve (point C to point D) is bend as shown in figure. Magnetization curve of a DC generator does not start from zero initially. It starts from a value of generated voltage due to residual magnetism.

What are the values of the magnetisation curve?

The magnetisation curve values for the iron are: As the magnetic circuits are in series (they all carry the same flux Φ the total m.m.f. required to set up the flux is the sum of the m.m.f.s in each part of the circuit. For the non-magnetic material, H = B μ 0 = 0·8 4 π × 10 − 7 = 636, 800 AT/m.

How does the shape of a magnet affect its strength?

Quite simply stated, yes. The shape of a magnet does affect its strength. If a magnet has a more pointed end, that end will be stronger than the rest of the magnet. This is because the shape affects the distribution of the magnetic energy in the space it occupies.

Which is the knee of the magnetization curve?

Point C is also known as the knee of the magnetization curve. A small increase in magnetism requires very large field current above the saturation point. That is why upper portion of the curve (point C to point D) is bend as shown in figure. Magnetization curve of a DC generator does not start from zero initially.