Example requires further explanation[edit]. Why is R1 ignored when calculating the Vth? . When you think about it, of course, the classical Thevénin and Norton circuits are exactly what . .. Jump up ^ Thévenin, L. “Sur un nouveau théorème d’électricité dynamique (On a new. Circuits électriques. Exercice 1: Générateurs de Thévenin et de Norton. Thevenin Norton TD Complet . rhéostat, vous faites varier l’intensité du courant électrique traversant le circuit, . Exemple: Vous placez en série dans un circuit. .. Au cours d’une matinée.3°. a – Calculez la durée de fonctionnement de cet.

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Why in the current example picture is R1 ignored when calculating the Vth? I can see where it looks like R1 was ignored. You are probably trying to assume that the curcuit at A is 0 V.

However, you are trying to find the voltage at A, so you can’t assume that it is 0 V. Therefore R1 is in an open circuit by itself, so the voltage must be the same on both sides of R1 because of Kirchhoff’s Voltage Law. I believe the example is wrong — according to my calculations, Vth should be For generalized impedances, the non-resistive parts are apparently folded into the voltage source, so the voltage is a function of frequency.

Comments on my pretty large changes? I think it would be very very very helpful if this were generalized to impedances.

I assume this is the right place to do that. I also assume that this would work with impedances given that the voltage source would be sinusoidal in some way like omegatron said.

Can this stuff be extrapolated to the frequency domain? Albert Einstein is notable, Garfield is notable, but a mention of Einstein in a Garfield strip would certainly not be notable, and would not be in the Einstein article. In the real world, of course, you can tell the difference, at least elsctrique By comparison, the Norton circuit always dissipates power so it gets warm and, short of magic or perpetual motioneventually runs down.

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The following comment was added on my talk page Fresheneesz I was wondering if theres other equivalent circuits other than thevenin’s and norton’s – ones perhaps with capacitances and maybe inductances.

A model circuut capacitances would be very useful in a lot of cases, so I would think they exist. Why say only for a single frequency?

Talk:Thévenin’s theorem – Wikipedia

I think that condition should be tnevenin in the article as its a bit misleading. The article has recently had added a proof by Cramer’s rule.

I have doubts that what is stated is actually a proof. I agree that proving that the load current is in the form. However, it is merely stated without proof that this is the result from using Cramer’s rule.

Doubtless Cramer’s rule can be used in a proof of Thevenin and the article can say this ideally with norron suitable citation but it should not be claiming to present a proof when no proof is given. Sp in ni ng Spark All the proofs I have seen involve examining the behaviour with added external sources, either voltage [1] [2]or current [3].

Talk:Thévenin’s theorem

I vote to delete it until something better can be written. Image and rest of article’s text theveniin need revision to suit. Please comment accordingly about these proposed changes. The term ‘single-frequency AC systems’ may be too restrictive. See for example http: Clearly, no other current flows though the conductor ABA’. Thus, the system of electromotive forces – E, E 1E 2. The quantity R has a precise physical significance, and one can call it the resistance of the primitive network measured between circuih points A and A’ considered like electrodes.

Coura statement of the theorem results immediately from this definition. The notation after the phrase “Calculating equivalent resistance: Can you please express this in a way that a non-initiate will understand without a lot of additional and unnecessary searching? A voltage source creates a difference of electric potential between its terminals; its replacement, a short circuit, equalizes potential.

Électricité/Les générateurs

Likewise, a current source generates a certain amount of current, whereas an open circuit stops electric flow altogether. Similarly with the current source. The opposite of matter, is antimatter while it’s absence would be vacuum. From Wikipedia, the free encyclopedia. This is not a forum for general discussion of the article’s subject. Put new text under old text. Click here to start a new topic.


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The impedance function Z 0 p is the driving-point impedance function at the terminals a-b of the terminal pair when all the ideal sources within the terminal paire are set to zero. Determine V oc as teh open-circuit voltage of A with B disconnected. Then the equivalent circuit of A is a source voltage V oc in series with R 1 where R t is the resistance at the terminals when all the independent sources are de-activated.

Proceedings of the IEEE. Electric Energy Systems Theory: Analysis of Electric Circuits. Paper S, A principle governing the distribution of current in systems of linear conductors ” “.

Retrieved 1 February Annalen der Physik und Chemie. Standard Handbook for Electrical Engineers 8th ed. Retrieved from ” https: Views Read Edit New section View history. This page was last edited on 16 Novemberat By using this site, you agree to the Terms of Use and Privacy Policy.

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