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Latest posts from topic “Circuito con 2 Generatori(Sinusoidale e Costante)” Latest posts from topic “Circuito con 2 Generatori(Sinusoidale e Costante)” on “ElectroYou”. 2019-07-01T16:52:13Z https://www.electroyou.it/forum/viewtopic.php?f=1&t=78109 Re: Circuito con 2 Generatori(Sinusoidale e Costante) https://www.electroyou.it/forum/viewtopic.php?f=1&t=78109#p818054 Davide9792 2019-07-02T10:33:33Z 2019-07-02T10:33:33Z


Ti ringrazio adesso è molto più chiaro il concetto, purtroppo sono alle prime armi per cui molte cose non riesco a vederle ad occhio. Applico il partitore di corrente e la legge di Ohm:

[unparseable or potentially dangerous latex formula].

Per il circuito in regime sinusoidale applico Thevenin ai capi dell'induttore e mi calcolo la Req e la veq:



R_{eq}= 150 Omh
[unparseable or potentially dangerous latex formula]

Dato che il testo mi da la condizione iniziale di i_L(0) e la funzione di ingresso, e mi chiede di calcolare [unparseable or potentially dangerous latex formula] in questo caso per quanto riguarda il circuito in regime sinusoidale non dovrei calcolare la soluzione particolare tramite il passaggio del transitorio??
Purtroppo non ho altri dettagli, di solito ci tocca calcolare i transitori, quindi ti chiedo se riesci a darmi qualche informazione in più o se devo semplicemente passare ai fasori, calcolarmi la corrente e sommare i due contributi ottenuti con la sovrapposizione.
Grazie per l'aiuto! :D
Re: Circuito con 2 Generatori(Sinusoidale e Costante) https://www.electroyou.it/forum/viewtopic.php?f=1&t=78109#p818031 IsidoroKZ 2019-07-01T23:21:01Z 2019-07-01T23:21:01Z
[quote="Davide9792"]Grazie per la risposta Isodoro :-)
Ho una domanda, per applicare il partitore di corrente in questo caso non dovrei prima far uso della trasformazione di una sorgente?


No, guarda lo schema, solo per la continua, quando l'induttanza e` un cortocircuito. Devi trovare IL in questo schema


Non serve nessuna trasformazione. Per la parte in AC invece puoi fare un eq. Thevenin della sorgente e di tutte le resistenze in questo modo



Da come hai scritto il problema sembra che il circuito sia a regime: entrambi i segnali sono cominciati a t dalle parti di meno infinito, quindi niente transitori, basta usare i fasori per trovare la corrente in L, in modulo e fase.
Re: Circuito con 2 Generatori(Sinusoidale e Costante) https://www.electroyou.it/forum/viewtopic.php?f=1&t=78109#p818018 Davide9792 2019-07-01T19:32:40Z 2019-07-01T19:32:40Z
Schema del circuito in regime sinusoidale(sotto l'applicazione della sovrapposizione):



Nello schema ho semplificato facendo il parallelo delle due resistenze da 100 ohm più la resistenza in serie da 250 Ohm.
Adesso applico la trasformazione di una sorgente e trovo il seguente circuito:


[unparseable or potentially dangerous latex formula]

Sommo le due resistenze in parallelo da 300 Omh:


Passo ai fasori e applico il transitorio per calcolcarmi la corrente [unparseable or potentially dangerous latex formula]:

[unparseable or potentially dangerous latex formula]

[unparseable or potentially dangerous latex formula]

|I^{P}_{L}| =\frac{4}{15}=0,266 A

[unparseable or potentially dangerous latex formula]

[unparseable or potentially dangerous latex formula]

Per t>0

[unparseable or potentially dangerous latex formula]

[unparseable or potentially dangerous latex formula]

[unparseable or potentially dangerous latex formula]

Non sono del tutto sicuro di questi calcoli, per cui sarei molto grato a chi potesse supervisionarli :cool:
Re: Circuito con 2 Generatori(Sinusoidale e Costante) https://www.electroyou.it/forum/viewtopic.php?f=1&t=78109#p818005 Davide9792 2019-07-01T17:54:44Z 2019-07-01T17:54:44Z
Grazie per la risposta Isodoro :-)
Ho una domanda, per applicare il partitore di corrente in questo caso non dovrei prima far uso della trasformazione di una sorgente?
Se applico il partitore di tensione sulla R3 trovo V_{R3}= 200\frac{100}{100+100}=100 V e infine mi trovo il valore della corrente facendo [unparseable or potentially dangerous latex formula]

Provo a calcolare la parte del circuito in regime sinusoidale.
Rettifico il primo post: Calcola la corrente [unparseable or potentially dangerous latex formula]
Re: Circuito con 2 Generatori(Sinusoidale e Costante) https://www.electroyou.it/forum/viewtopic.php?f=1&t=78109#p818002 IsidoroKZ 2019-07-01T17:08:25Z 2019-07-01T17:08:25Z
Visto che in continua l'induttore e` un cortocircuito, puoi semplificare il tutto cosi`



e non serve piu` Thevenin, basta la legge di Ohm e un partitore di corrente. Invece per il contributo della sorgente sinusoidale direi che ci voglia Thevenin.
Circuito con 2 Generatori(Sinusoidale e Costante) https://www.electroyou.it/forum/viewtopic.php?f=1&t=78109#p817998 Davide9792 2019-07-01T16:52:13Z 2019-07-01T16:52:13Z
Un altro esercizio molto simpatico, questo è lo schema:


Sapendo che
[unparseable or potentially dangerous latex formula]
[unparseable or potentially dangerous latex formula]
Calcola i_L(t)

Ho pensato come 1° step di applicare la sovrapposizione degli effetti(spengo il generatore v_s(t) dopodiché applico Thevenin ai capi dell'induttore e mi trovo la Req e la Veq, stesso procedimento per l'altro generatore(in questo caso vado a cercare La Veq del generatore Sinusoidale dato che la Req è sempre la stessa).

Consigli su come impostare l'esercizio o altre strade più semplici? :D