Table of Contents
- 1 How can eddy current and hysteresis losses be minimized in an electrical machine?
- 2 How is hysteresis loss minimized in a transformer?
- 3 How the eddy current losses in an electrical machine can be reduced?
- 4 Which one of the following material is used to reduce magnetic losses?
- 5 What causes hysteresis loss?
How can eddy current and hysteresis losses be minimized in an electrical machine?
The eddy current loss occurs because of the interaction of magnetic field and conductor. The hysteresis loss occurs because of the reversal of the magnetism. The eddy current loss is minimised by using the thin core of lamination. The silicon steel material is used for minimising the hysteresis loss.
How can we minimize hysteresis loss the magnetic material?
∴ The hysteresis loss in a given magnetic material may be decreased by decreasing maximum flux density established through it or by using magnetic material having low hysteresis coefficient.
How is hysteresis loss minimized in a transformer?
∴ The hysteresis loss in a given magnetic material may be decreased by decreasing the maximum flux density established through it or by using magnetic material having a low hysteresis coefficient.
What is the hysteresis effect in an electrical machine?
Hysteresis can be a dynamic lag between an input and an output that disappears if the input is varied more slowly; this is known as rate-dependent hysteresis. However, phenomena such as the magnetic hysteresis loops are mainly rate-independent, which makes a durable memory possible.
How the eddy current losses in an electrical machine can be reduced?
Eddy current magnitude can be reduced by designing the core as a set of thin sheets or laminations, in parallel to the magnetic field. Each sheet must be insulated from its neighbours with a thin coating of varnish or oxide film. By laminating the core, the area of each section and hence the induced EMF is reduced.
What causes 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. In order for the flux density to reach zero, the magnetizing force must be applied in the negative direction.
Which one of the following material is used to reduce magnetic losses?
Hence, the laminated ferrite core is best material to for microwave frequency in order to reduce those losses because this material has high permeability in nature. ferrites are magnetic. ferrites have low permeability.
What is hysteresis loss and eddy current loss in transformer?
Hysteresis loss is caused due to molecular friction in a ferromagnetic material, under alternating magnetic field. Eddy current loss us caused due to the induction of eddy current in the core and conductors held in magnetic field. Formula. Occurs in. Hysteresis loss occurs in the core of an electric machine.