Hello, friends, I hope you all are doing great. In today’s tutorial, we will discuss the Difference Between Eddy Current & Hysteresis Loss. The basic difference between eddy current and hysteresis is that relative motion among the conductor and magnetic field causes eddy current losses. While hysteresis loss occurs due to the retaining process of a field in the core when the external supply is off.
In today’s post, we will have a detailed look at both eddy current and hysteresis losses with a detailed comparison of them to find their differences. So let’s get started with the Difference Between Eddy Current & Hysteresis Loss.
Difference Between Eddy Current & Hysteresis Loss
Eddy Current
- These power losses exit due to relative movement among the core and flux in the core.
- The formula for eddy current is given as.
Pe = Ke x Bmax2 x f2 x t2 x V
- This loss occurs when there is an interaction between the conductive material and flux exits.
- It can be decreased with the use of a thin laminated core.
- These currents are moved in the closed path created through conductive meters and have a field at ninety degrees.
- These currents can affect the close object that phenomenon works in transform
- The eddy current strength in any material relies on some factors like conductor length, field, area, and flux varying rate.
- The field created by the eddy current disturbs the source that creating the field according to Lenz law.
- The conductive material having 0 resistivity value will produce heat due to the eddy current. With that, they produce electromagnetic force
- The heat used for the induction heating process
- Eddy current caused the production of the skin to affect the conductive materials. Also, produces a proximity effect
Hysteresis Loss
- These losses occur due to the reversal phenomena of magnetism in the core of instruments like a transformer, or generator.
- It also demagnetization and magnetization of the core of the transformer through the external field.
- With the magnetizing process increase flux rises.
- Its formula is given as.
Pb = η x Bmaxn x f x V
-
- Pb = hysteresis loss (W)
- η = Steinmetz hysteresis coefficient, depending on the material (J/m3)
- Bmax = maximum flux density (Wb/m2)
- n = Steinmetz exponent, ranges from 1.5 to 2.5, depending on material
- f = frequency of magnetic reversals per second (Hz)
- V = volume of magnetic material (m3)
- It occurs when there is a magnetized core like a transformer core and after removal of the input supply, there is some magnetism occurs in the core.
- It can be reduced with the use of a core created with silicon steel that gets demagnetized as the supply is off.
How do you separate hysteresis and eddy current loss?
- The partition of eddy current and hysteresis losses in transformer cores is obtained with the use of 2 temperature and 2 frequency methods. Losses measurements for 6 rating use of voltage testing signal ratio are added to compare and analyze results.
What is eddy current loss also called?
- If the eddy current of magnitude passes through the core path of resistance, it will dissipate energy in heat form for power equation I2R. It denoted energy expended for not any best work. It is called eddy current loss and also iron loss.
What is an example of a hysteresis loss?
- The best examples of hysteresis losses are electromagnets, permanent magnets, and the core of the transformer. They uses ferromagnets.
What are the hysteresis and eddy current losses of the transformer?
- The eddy current is based on the maximum value of flux density, frequency, and plate thickness. Hysteresis loss is the result of the constant motion of molecules in the transformer core when the current is time-varying.
What is known as eddy current?
- For electromagnetism, eddy current is a loop electric current induced in conductors through varying magnetic fields for a conductor based on Faraday’s law of induction or through the relative motion of a conductor in a magnetic field.
What causes hysteresis loss?
- Hysteresis loose are result of magnetization and demagnetization of core as current passes in opposite directions and releases in the form of heat.
What are two advantages of eddy current?
- It is employed for household current meters for measuring power use. It is discontinuities, fractures, or errors without harming the material.
Can we reduce eddy current loss?
- Eddy current losses are reduced by making the core of a stack of plates insulated from each other, then solid block all transformers working for low-frequency USS laminated cores.
Is eddy current AC or DC?
- The eddy current is the result of energy losses in AC inductors, transformers, electric motors and generators, and other machines. It needs certain structures like laminated magentic cores or ferrite cores to reduce them
What is hysteresis loss in a transformer?
- Losses of energy are due to continuous magnetization and demagnetization of the transformer called hysteresis loss. Hysteresis losses for transformers can reduced with the use of soft magnetic materials for the core such as permalloy or silicon iron.
What is the reason for hysteresis loss?
- Hysteresis loss in the transformer is due to magnetization saturation for the core of a transformer. Magentic materials in core will magnetically saturated when are put in strong field like magnetic field generated by an AC.
That is a detailed post about the difference between eddy current losses and hysteresis losses if you have any queries ask in the comments. Thanks for reading.