Mechanical-stress analytical modeling for the design of coils in power applications

• Autorzy: Bellan D.

Identyfikatory

DOI

10.2478/aee-2014-0039

• Języki publikacji: EN

Abstrakty

EN

Modern electrical-power systems are often exploited for transmitting highfrequency carrier signals for communications purposes. Series-connected air-core coils represent the fundamental component allowing such applications by providing a proper filtering in the frequency domain. They must be designed, however, to withstand also the line short-circuit current. When a high-magnitude current flows through a coil, strong mechanical stresses are produced within the conductor, leading to possible damage of the coil. In this paper, an approximate analytical model is derived for the relationship between the maximum mechanical stress and the electrical/geometrical parameters of the coil. Such a model provides the guidelines for a fast and safe coil design, whereas numerical simulations are only needed for the design refinement. The presented approach can be extended to other applications such as, for example, the mechanical stress resulting from the inrush currents in the coils of power transformers.

Słowa kluczowe

EN

coils; mechanical stress; analytical modeling; line traps; PLC

• Wydawca: Polish Academy of Sciences, Committee on Electrical Engineering
• Czasopismo: Archives of Electrical Engineering
• Rocznik: 2014
• Tom: Vol. 63, nr 4
• Strony: 579--590
• Opis fizyczny: Bibliogr. 7 poz., rys., wykr., wz.

Twórcy

autor

Bellan D.

• Department of Electronics, Information and Bioengineering Politecnico di Milano Piazza Leonardo da Vinci, 32, 20133 Milano, Italy

Bibliografia

• [1] IEC 60353, Line traps for a.c. power systems. (2002).
• [2] Hayt W.H. Jr., Buck J.A., Engineering Electromagnetics. McGraw-Hill (2006).
• [3] Lure A.I., Vasilev A.B., Calculation of magnetic field and electrodynamic strength of transformers under magnetising current inrush. Elec. Technol., pp. 23-35 (1992).
• [4] Steurer M., Frohlich K., The Impact of Inrush Currents on the Mechanical Stress of High Voltage Power Transformer Coils. IEEE Trans. on Power Delivery 17(1): 155-160 (2002).
• [5] Grover F.W., Inductance Calculations. New York, Dover (1962). Lundin R., A Handbook Formula for the Inductance of a Single-Layer Circular Coil. Proceedings of the IEEE 73(9): 1428-1429 (1985).
• [6] Young W.C., Roark’s Formulas for Stress and Strain. McGraw-Hill Book Company (1989).
• [7] Bertagnolli G., Short-circuit duty of power transformers – the ABB approach. Golinelli Editore (1998).