De bază probleme în putere transformator design

Putere transformator este utilizat la convertit AC tensiune% 2c curent și transmisie AC putere este a static electric echipament, în proiectare proces nevoie de a lua în considerare a varietate de factori , menține a bun structural aranjament, extinde utilizarea timpul din echipamentul .
The fundamental problems of power transformer design are magnetic flux and current density. The current of the transformer is proportional to the capacity, and the magnitude of the current density (i.e. the thickness of the wire) is considered according to the heat generated by the conductor. For magnetic flux, the basic relationship of electromagnetism is u=4.44fw, where u is the voltage and f is the frequency, here it is 50Hz, fixed value; w is the number of turns of the coil; In the φ is the magnetic flux. Since the magnetic flux density B of silicon steel sheet is limited by the material, it can generally only be designed to 1.4-1.8 Tesla, so to increase the φ, generally only the cross-sectional area of the iron core can be increased. The core of the transformer is generally a three-phase column type, the cross-sectional area of the iron core can be determined according to the above formula, and the size of the core window should consider the principle of putting the coil in. The larger the capacity of the transformer, the thicker the wire, and the larger the window of the core.
In the design of power transformers, the amount of copper and iron can be balanced. Pentru că o dată capacitate de transformator este determinat, curent este determinat, curent este determinat, the grosime of the wire is determinat, creștere the number of turns W, the magnetic flux φ can be smaller, the transversalal area of the core can be smaller, but to wind these turns in, the window of the iron core should be biger; On the contrary, by reducing the number of se rotește W, the magnetic flux φ will be mai mare, și the transversal-sectional area of the iron core will be mai mare, but the window of the iron core can be smaller.