(a) Explain hysteresis loss in a magnetic core.(b) Figure 1 shows a magnetic core, with cross-sectional area of 9 cm², is madefrom cast iron and steel-cobalt composite with the mean length of 33 cm and 30 cm,respectively. A current of 1.5 A flows through the coil. If the total flux is 0.8 mWb andassuming the relative permeability of the cast iron is 2000. Determine:Cast ironSteel-cobaltcomposite135 turnsFigure 1(i) the relative permeability of the steel-cobalt composite.(ii) the new coil current required to maintain the same flux if a 3 mm air gap is made in thesteel-cobalt composite. Assume the fringing effect and flux leakage can be neglected.

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(a) Explain hysteresis loss in a magnetic core.

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter3: Power Transformers

Section: Chapter Questions

Problem 3.1MCQ: The Ohms law for the magnetic circuit states that the net magnetomotive force (mmf) equals the...

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Concept explainers

Type of Magnetic Material

Every material has a unique composition that defines its magnetic behavior. Some materials get attracted towards a magnet and are called magnetic materials. Based on the magnetic properties held by each material, they are classified into different types.

Question

(a) Explain hysteresis loss in a magnetic core.
(b) Figure 1 shows a magnetic core, with cross-sectional area of 9 cm², is made
from cast iron and steel-cobalt composite with the mean length of 33 cm and 30 cm,
respectively. A current of 1.5 A flows through the coil. If the total flux is 0.8 mWb and
assuming the relative permeability of the cast iron is 2000. Determine:
Cast iron
Steel-cobalt
composite
135 turns
Figure 1
(i) the relative permeability of the steel-cobalt composite.
(ii) the new coil current required to maintain the same flux if a 3 mm air gap is made in the
steel-cobalt composite. Assume the fringing effect and flux leakage can be neglected.

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