1 Answer
### Hysteresis Loss:
Hysteresis loss is a type of energy loss that occurs in magnetic materials when they are magnetized and demagnetized repeatedly. It happens because of the internal friction and resistance in the material as the magnetic domains within the material align and realign with the changing magnetic field.
Here's how it works:
In simpler terms, every time the material’s magnetic field switches direction, some energy is "wasted" as heat, and this is known as hysteresis loss. This loss depends on the material's properties, particularly its magnetic characteristics, and the frequency of the changing magnetic field.
Iron Loss (Core Loss):
Iron loss (or core loss) refers to the energy losses that occur in the magnetic core of transformers, motors, or any other electrical devices that use iron cores. It mainly consists of two types of losses:
Iron loss (core loss) is a combination of both hysteresis and eddy current losses. The total iron loss in a transformer or motor depends on factors like the material used for the core, the frequency of the alternating current, and the magnetic flux density.
Summary:
These losses are important to consider in the design of electrical machines because they affect efficiency and performance.
Hysteresis loss is a type of energy loss that occurs in magnetic materials when they are magnetized and demagnetized repeatedly. It happens because of the internal friction and resistance in the material as the magnetic domains within the material align and realign with the changing magnetic field.
Here's how it works:
- When a magnetic material (like iron) is subjected to an alternating magnetic field, its magnetic domains (tiny regions where magnetic moments of atoms are aligned) continuously change direction.
- This constant change causes energy to be lost in the form of heat due to the friction between the domains as they align in the direction of the changing magnetic field.
- The energy lost per cycle of magnetization is proportional to the area of the hysteresis loop on a graph of magnetization versus magnetic field.
In simpler terms, every time the material’s magnetic field switches direction, some energy is "wasted" as heat, and this is known as hysteresis loss. This loss depends on the material's properties, particularly its magnetic characteristics, and the frequency of the changing magnetic field.
Iron Loss (Core Loss):
Iron loss (or core loss) refers to the energy losses that occur in the magnetic core of transformers, motors, or any other electrical devices that use iron cores. It mainly consists of two types of losses:- Hysteresis Loss (as discussed above): This occurs because of the continual reversal of magnetic field in the core material.
- Eddy Current Loss: Eddy currents are circulating currents that are induced within the core when the magnetic field changes. These circulating currents cause energy to be dissipated in the form of heat.
Iron loss (core loss) is a combination of both hysteresis and eddy current losses. The total iron loss in a transformer or motor depends on factors like the material used for the core, the frequency of the alternating current, and the magnetic flux density.
Summary:
- Hysteresis Loss is the energy lost due to the resistance to the continuous magnetization and demagnetization of a material (typically in the core of electrical machines).
- Iron Loss is a combination of hysteresis loss and eddy current loss, and it's the total energy lost in the iron core of a transformer or motor when exposed to an alternating magnetic field.
These losses are important to consider in the design of electrical machines because they affect efficiency and performance.