Naslov
O modeliranju Teslinih odašiljača prijenosnom linijom
(Some Notes on Transmission Line Representations of Tesla's Transmitters)

Autori
Blažević, Zoran ; Poljak, Dragan ; Cvetković, Mario

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Zbornik sažetaka Međunarodnog znanstveno-stručnog skupa "Život i djelo Nikole Tesle" = Proceedings of the International Scientific and Professional Meeting "The Life and Work of Nikola Tesla" / Kniewald, Zlatko - Zagreb : Akademija tehničkih znanosti Hrvatske (HATZ), 2006, 108-109

ISBN
953-7076-09-1

Skup
Međunarodni znanstveno-stručni skup "Život i djelo Nikole Tesle"

Mjesto i datum
Zagreb, Hrvatska, 28.06.2006. - 29.06.2006

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Teslini odašiljači; rezonator; prijenosna linija; stojni val
(Tesla transmitters; resonator; transmission line; standing wave)

Sažetak
In this paper, we analyse the transmission line (TL) representations of various Tesla’ s transmitters. This type of modelling is very suitable for description of resonator circuits, as in such arrangements the dissipation caused by electromagnetic radiation detached from the circuit is very small, and can be regarded as loss. And even such a waste of power can be incorporated in a TL model by introducing imaginary capacitances and inductivities in the circuit scheme. With this model it is possible to simulate many interesting resonator effects and as such it may be very useful in designing such apparatus. For instance, the standing wave pattern, magnification ratio, current distribution on the resonator parts open to electromagnetic radiation, etc. are easily obtainable by such an analysis. However, this model has its limitation, for instance, if several spatial modes propagate through examined structure, every electromagnetic mode must be modelled separately. This means that every TL representation must be carefully applied in accordance to the geometrical and electrical characteristics of the structure. The most common TL model that incorporates a lumped source on one end of the line is however not sufficient to explain all Tesla’ s equipment, e.g. the various standing wave patterns obtained. Therefore instead of the lumped source, for the corresponding Tesla’ s apparatus we are going to employ a TL model with distributed voltage source on the line. In this model a small line segment contains a voltage source due to the induction. This voltage can be viewed as a consequence of the constant alternate current that flows through the secondary circuit due to the activity of the primary. It is assumed that the primary is loosely coupled to the secondary, which permits the secondary to vibrate freely. All the standing wave characteristics of the Tesla’ s resonators are easy obtainable by such a TL model. Moreover, from the analysis of the antennas used in Colorado Springs (p. 198 of Colorado Springs Notes) by TL models that follows, it is shown that the distributed voltage source can be exchanged by a lumped one settled in the standing wave node, which divides the resonator on two parts that resonate on the same frequency. In relation to this, it is interesting to note the settlement of the primaries in the arrangements, where it seems that the primary coil is settled at or near the assumed node of the secondary. In his calculations Tesla never used differentials and this analysis clearly shows that his approach is fully in accordance to the TL concept.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika

POVEZANOST RADA