καπου λεει για τις απωλειες αν οχι στα σηε, στα βιβλια των μηχανων τοτε σιγουρα αλλα βαριεμαι να ψαξω.
το gpt παντως λεει σιδηρου (δεν μιλαει και καλα ελληνικα! τρομαρα του) αν και να πω την αληθεια δεν το εμπιστευομαι.
Εμένα μου απάντησε χαλκού
In a power transformer with copper windings and an iron core, it is generally better to have more copper losses than iron losses.
Copper losses in a transformer are primarily due to the resistance of the copper windings. When current flows through the windings, it encounters resistance, which leads to the generation of heat. Copper losses can be categorized into two types: copper conductor losses and copper eddy current losses. Copper conductor losses occur due to the resistance of the copper wire, while copper eddy current losses occur due to circulating currents induced in the copper windings by the changing magnetic field.
On the other hand, iron losses in a transformer are primarily due to two factors: hysteresis loss and eddy current loss. Hysteresis loss is the energy dissipated as the magnetic domains within the iron core repeatedly realign with the changing magnetic field, while eddy current loss is caused by circulating currents induced within the iron core by the magnetic field.
In terms of efficiency and performance, it is generally preferred to have higher copper losses than iron losses for the following reasons:
1. Copper losses are easier to manage: Copper losses can be reduced by using thicker copper conductors or using materials with lower resistivity. By increasing the cross-sectional area of the copper windings, the resistance can be reduced, thereby minimizing the copper losses. Additionally, improving the design and insulation of the windings can minimize eddy currents. These adjustments can be more easily implemented and controlled during the transformer's design and construction.
2. Iron losses are more difficult to reduce: Iron losses are inherent to the magnetic properties of the iron core and are more challenging to minimize. While the use of high-quality magnetic materials and advanced core designs can help reduce iron losses to some extent, there are limits to how much they can be reduced. Iron losses depend on factors such as the core material, core geometry, and operating frequency, and it is challenging to significantly reduce them without compromising other aspects of the transformer's performance.
3. Iron losses are generally proportional to the transformer's size: Iron losses tend to increase with the size of the transformer due to the larger core volume. Higher iron losses result in more heat generation, requiring additional cooling measures to maintain the transformer's temperature within acceptable limits. This can lead to increased complexity and cost in the transformer's design and operation.
Overall, while it is desirable to minimize both copper and iron losses in a power transformer, it is generally more practical and manageable to have higher copper losses than iron losses. By focusing on reducing copper losses, one can achieve better overall efficiency and performance while maintaining the transformer's reliability and cost-effectiveness.