Answer Posted / raul

The hysteresis loss is due to the retentivity. When you
increase the mag. flux intensity in the material, the mag.
flux density also increases. But when you reverse the
polarity of the mag. field intensity, then the flux
reversal would not follow the same path as it has followed
during the increase. And with mag. flux intensity value
equal to zero, the mag. flux density is not equal to zero
i.e. it has some retentivity. And due to the flow of this
retention field in the material, the hysteresis losses
occur.

Hysteresis loss = hysteresis constant * frequency * (mag.
flux density)^x

where x = Steinmetz constant = 1.5 to 2.5 for ferromagnetic
materials.
and mag. flux density is nothing but retention field.

How does an induction motor start?

1228

---

A 2083kva AVR was tested, phase to ground shows continuity, what is the implications

1035

---

How we can determine short circuiting current any plant and for example a plant which power generation is 415 volts and plant load is 500 kw.

2004

---

What is the difference between DOL starter and star delta starter

1136

---

What do you mean by reach and reach the point of the relay?

1265

---

Could the power factor on electrical system can affect the registration of the kwhr meter or the CT/PT? 

1968

---

hi frnds what is meant by harmonics & what is meant by third hormonics,where its will occur ?thank u

2017

---

please give me solution to rectify the emi(electromagnetic interference)

1922

---

What are electric motors?

1165

---

how can we make cable shedule for controll wiring ? which details must be required for it.?

2149

---

Why can't we parallel Voltage transformer secondary circuits?

1646

---

which network topology offers the greatest level of tolerance?

2164

---

WHAT IS MEANT BY DERATING OF THYRISTOR?

2967

---

What is the role of feedback in a closed loop control system?

1087

---

What is sink and source?

1198

---