Advanced Aspects of Theoretical Electrical Engineering Sozopol '2010 19.09.10 – 22.09.10, Sozopol, Bulgaria
Hydraulic Analogy for Inductive Electric Elements
George Popov1), Rumen Trifonov2)
1) Computer Science Department, Technical University of Sofia, Kl. Ohridsky Str,No.8, 1000,
Bulgaria, phone: +3592 965-22-24, e-mail: email@example.com
2) Computer Science Department, Technical University of Sofia, Kl. Ohridsky Str,No.8, 1000,
Bulgaria, phone: +3592 965-22-24, e-mail: firstname.lastname@example.org
Abstract: - This document presents а new hydraulic model of coil and transformer. The
method of hydraulic analogies is very useful to explain physical phenomena in area of
electrical circuits, because hydraulic models have a lower level of abstraction.
Key-Words: - electric circuits, electric chain, hydraulic model, coil, transformer
Use of the hydraulic analogies to explain circuits and electronic circuits has many
advantages: things are dealt with at a lower level of abstraction, as are associated with
clear concepts of learner, to summarize the common phenomena in nature, it is
possible to transfer knowledge and skills from one area to another, etc.
There are large known analogies between electric and hydraulic circuits:
•pressure - potential;
•difference in pressure - tension;
•flow - current;
•narrowing of the tube - resistance;
•pump - electric current generator;
•tower pressure - voltage generator;
•valve - diode;
•quantity of water - capacity.
It is interesting to note that there are hydraulic models of bipolar and field
transistors, to whom are applicable some fundamental equations of electronics!
The abstract expression of electrical parameters by analogy has another useful
side - it can be clarified Precedents factors and to derive appropriate mathematical
formulas. Another useful part is the use of the developed mathematical apparatus for
electrical circuits for the study of other phenomena.
It is obvious that, first and second Kirchhoff laws apply to hydraulic circuits. Also
Ohm's law formula for the resistance