How BH curve is determined for a ring specimen?
The value of flux density corresponding to this H can be calculated by dividing the flux by the area of the specimen. The above procedure is repeated for various values of H up to the maximum testing point. The B-H curve may be plotted from the measured values of B corresponding to the various values of H.
What is a BH loop?
A hysteresis loop shows the relationship between the induced magnetic flux density B and the magnetizing force H. It is often referred to as the B-H loop.
What is BH curve for magnetic material?
The B-H curve or magnetisation curve is the graph plotted between magnetic flux density (B) and magnetising force (H). The B-H curve indicates the manner in which the magnetic flux density varies with the change in magnetising force. The following figure shows the general shape of B-H curve of a magnetic material.
What is the value of BH?
At a place on earth the value of BH is 0.1732 oersted and angle of dip is 30°.
What is the significance of the area of a BH loop?
The area of hysteresis gives the amount of energy lost in applying the external magnetic field. Large the area, more energy loss. Lesser the area, least energy lost.
What is BV and BH?
Horizontal and vertical components of earth’s magnetic field are Bh and Bv, respectively. We know that Bh=B cosδ where B is the earth’s total magnetic field and δ is the angle of dip. Also, Bv=Bsinδ
What is BH at a place?
answer: At a place Be is the earth’s magnetic field and BH is its horizontal component.
How do you find the area of a BH loop?
Hysteresis loop in first quadrant will be obtained. Go to gadgets -integrate, from the pop up window click on baseline – data set-Add plot 2. Adjust the width of the box which appears now, Area of the selected region between the two curves will appear on screen.
How do you plot the B-H curve?
The B-H curve may be plotted from the measured values of B corresponding to the various values of H. The circuit for this test is shown in Fig. The magnetizing winding is supplied through a potential divider having a large number of tapping.
What is a hysteresis loop?
The absence of re-traceability of the magnetization curve (H) is the property called as hysteresis and it is associated with the presence of magnetic domains in the material. A hysteresis loop shows the relationship between the induced magnetic flux density (B) and the magnetizing force (H). This is the reason it is also called as the B-H curve.
How to plot the B-H curve of magnetizing winding?
The B-H curve may be plotted from the measured values of B corresponding to the various values of H. Step by step method The circuit for this test is shown in Fig. The magnetizing winding is supplied through a potential divider having a large number of tapping.
How are the ‘B’ and ‘H’ signals obtained?
The retrieved ‘B’ and ‘H’ signals are processed offline to obtain the results. The lamination sheet has been tested for frequencies in the range [0.1-150 Hz] and flux density levels up to 1.5 T. The obtained results depict characteristics hysteresis curves and measured loss figures.