0% found this document useful (0 votes)
55 views17 pages

Alternating Current

The document discusses alternating current (AC) and its properties, including the generation of AC, the relationship between voltage and current, and the concepts of mean and RMS values. It also covers the behavior of AC in resistive, inductive, and capacitive circuits, as well as the phase relationships between voltage and current. Additionally, it touches on the use of transformers and chokes in AC circuits.

Uploaded by

Taiyaba Tarique
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF or read online on Scribd
0% found this document useful (0 votes)
55 views17 pages

Alternating Current

The document discusses alternating current (AC) and its properties, including the generation of AC, the relationship between voltage and current, and the concepts of mean and RMS values. It also covers the behavior of AC in resistive, inductive, and capacitive circuits, as well as the phase relationships between voltage and current. Additionally, it touches on the use of transformers and chokes in AC circuits.

Uploaded by

Taiyaba Tarique
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF or read online on Scribd
You are on page 1/ 17
Ae. ALTERNATING cor PENT Upsent In which clivechon changes attemnakly . Ac so ree cyrabol —O— + Polarity sore alse —— yw changes a weoxsrrotely —> | o> | ~ (onl Tn IF Hk AC ae generator (AC bynamo Afernating current 1s peoduced bY he alleraalng ene produced on AC gene xasor* When & conduchrg loop tates in a raagneht field 0% of *5. induced tue fo changhg nea oi timately inducing cursen flax ak any time Ge gree d > BACH End 2 -Nad =-NBA fees @ Ne no: G& srs dF oF Be ro0g- freed &md > -NBA cond te) , > Area & (op {nd = naAw sinc YY) > ang. speed 22 =%f for max Sd’ smut of 1 frepueney >t mel wean =f =mar emt t. fuHlng value ff &o oy eg (OD mol > Ca sir@r f.2 nea J Te. £ Ea L.sinwt pee To Eosinwh = Zo aon? current of * Consider a generctt form fOr generar form fi ‘ T= To smut +d) Ty 2 peak Valuefrrak Value % d xpoltras phase { pn an Ac. cecal ts G: %e eguatren Of current as €207 T> losm(sore +h) Aap Dro F 6 e value f current /Mean Value wt Averog whe value f athernatng currenk equal + hich fransfers across a circult same chOTge asstrans pire by the Ac clutrng he came me. + As Ac flows duemng one half cycle in ane cl'rech/or ond cuarng the ofher halt cycle » oppure reckon, ds 9. mean value for one Complek cycle Is Ker. 0 steady current ts éu oc. lor full cycle br 0 oo & 5722 a a Tar | & Tv Tr inv cl, l. Zavg > [20 — 2 [smote T-o : Tay = Ze ~ cgstat]” = - Zo < = [- ee Ze [eos — caso%J [Zong = + whereas UA hag cycle > fre Far © oh 7. [Zesmardt 5 82 [- corse], . é To : M hod @ finite, value tr20 ~¢ tLe ey v Us Tavg dy Tavg S . 4 [eargr ~ tsar? Javyg> - % C Te [cash ~ caso") _ A > Tovg > Qo. wheat | a vo That, Cot C fer ful cycle) ( (20 4 b= 722hhe ) Tavg >0 ca. @ case if (fer holf cycle) (20 fs €2 a> Ma) > re Ph B%e 20-6870 + Lovg cosesl (over Cong fove) (te0 to Cae) “Ff avg > 38 Rms value a cuyrent ap is rook of average ever a fame posed no Teams > wo value yf quart fF caren, ols ¢ I rs also Known virtues or bffechve vale f ory cerspent anol olefred as Yhak yale fF steady current ishich eroulo! generate Lhe SIME amount & heak m S pven vesrs fANCk ny agith dre ct generated 4y arctan! current pasrng through thy same resastance for the, same given dime . bor for first hay. cycle ce vo wag of) \ 2 Tr Temi = Sap _ “Pit embtot \ °, Pio “7 Tesp Tr We nm Sims > & De [acmeot elt . TOT Tene» Ba [ft caster Jets] = a Th Tin Lm 9 BS Star - Jeaaevat] 7 Ve ca Jeasaustse 20] > fos vatun of feu eye [tao * ter) 6 Kemahs same od haly ae Try 2 2a 20-9092 vr “~ Eg ymtlarty tms value f em/. Ee Ems es 2 Ovpor &o + he vellmeter rreaturmng village giver rs value ofvvttoy< Thus Khen AC ab agov Ps supbtied of heme OFS peak vatus “7 42 bo 2 vv €rms Ey = V2 Qo = Iv Hence village vattes from #IV te - Thuy aaov Ac fr m70re clange rows fran Qo WIV +n each oyche . VAC, Ho Power tn Ac ctecutt =— Lob, : E> fo slnwt L 2270 confer) duo Small ewrk dene by Source 1% time atl. duis Vda o V Cdk C ag 2dr] dw. fost To cPolwe rh) ol dw 2 fo Te smut (sm esteor b ce carar din) te dw &o Lo sith coopadb & £,Zo sinh stnar eset r fee 5 kota wr [mrad eto cg fa cman lr L e ° 1 ; a [smtuakdb = 02 woo & fo cosh T 6 i as z ot “ fgnarde = © ° ‘ “% 1 FF ‘ Zz $ Rg cote F ¢ For pure resistive are, 620) cosg st po ttle > Evy Leo z pure mductve or capacitive arealt) 63M, Thus ne power couumed ie. ne lon cael (far om F energy by capaciter or thducha cord 29 poo * Wattlecs currenh~ ANhen othe average power remanrne Zeng due to zero Nrirdance Man ac creceeth and cuavrent Slous Nithouk any cl'ss/pahon of energy , whe Curnnk in cue 4 clrcutt fs catled wartless currenk+ eb Current dhyvough pure inductor ey capacthr which elitc#pasty ne power Fs cated! walters ov Tclle currenk, cue (efor _b-R civeurt) ate Po fay Pld card vee TL ale VerZR H CHOKE cole + High Inductance cot made of thick , mrulaled copa. WAN wound closely ma large number of tums over a soft teon laminated Core - Alen core mre & Frigh permecsstiby Copper tate cat oo Tanick & Ralmost ze + Used in Ac circ} to reduce current by invalumg almoc! xero or (He (att Of energy R L (choke cart) mo £ To Z to 7 &o 2265 «mur Jere att In b-c creufts choke cil cannst be eured cu oro, Thy only vetistance §F coll reams effcetive sshich tao he dns ted heortal ts ceo do Veoluen Currrenh elechical *nergy Halter, Xr 207 almost Fkr0" Lsnich resus in loss of rransfotmer currenh ak eee eae converting large alfernafn info small current ab Aigh vatlage , 20d by whe penepple gf mural srdfucton. low valtoge vice~ vasca , Uced only mm At Nak MAC ‘type & skpup ou skp-down ve u converts Aigh voltage valt & converts flow vastage oe er ones into higher vathag € —— Core Coke Ho ‘ ohm ation Ya i oe keane frm P ot «In depp Ol vé Vex 2p YF A eee C clveutt uy, with — only Resistance CR) / Resistive circuit R Alternating voltage of we source [é= fesinwt | on YU Liste cucrent flowing, &= Lo cinwdt "fee al He =f = bo sinukr ‘ ([£°78 “tae ] R R Fa tecmar[ af | [oo J Amplitude. feurren” Tpeak currenr ~ cuneenk@ and : vatrage (e) are 7 same \ phare & vay smrusordelly 5 + Qn phasor dlragsa™ , current £ valtage are yepresenid by ank clockuate rofahing vectors Known as phasors « + In pure vésis hve creel, current £ valfage phaser parauel ot every Instant. are pence, sofates pogetner RK R Ris inckepenclent Fe. phasor cbiogtam (ee Ac ciycertt ts Only Tncluchame === ers Kero- + for pure fnatuctox , wesisdene cot verwes cinusoielally rYus + cuggent in 1he induced! Valtage develops Inthe cet epprinng the source valhage: Laz oO — + Bind In inductor = © ip @=Bosinwt Ee - émd 2° _ me * Thus Wher valtage '< roar ony, bosmwt = End curvenk bf Kewy vice VOTES - fosmust = Lar _ we me fee & let > & musket we ‘L ype we A sane climen ser ash, fer = fo friar lt thus pk is he posit Oe oped 7 py inetuctor KNOW? ay moluceve Ont 3 reache7ce « | Xp clepends &” frequency J : pee, W20- Haw ys f. coure L os to - bo cosck means inductor offvs no oe resistance (Xe reprrfance ) _—_—_— do Soe | go be mah) | = = wet = [> wt? andl / for rnax current cmt J2/ ars 4) fofepuncy Xe of ¢ XL oo t Xr nereases comparing fais epuahbn uy, anh tans y mn frequency fo bo cmuck Ris Sen Of current dhak ina pure onduchrr , Ae fi mF currenk lags Schad the an + Fa AC: (high vatiage 7 & pase angle g | mre fora) °, Inductor b woe a Ve oe OO net a ene me wo «x High porate valtage leads 4y , or 902 or guarkr cycle wa ve cliag rare chive eércult HE Ac Chri with copacttance only [cape = ‘i «charge 67 capacitor plate yarres contmad ly 9 as vettage /s alternahng - + tek ak any mstank charge 2& current 22 QL thee PS 70 resistance crculh. mi Poeecna feo cee we Raachance 2i€ € 2 5 fost + & olepends an freyuency Z£ © source , Q> ce, smut . for be: LL A do. = a (cbosinet) 0 1 for high feo a Yo % Ae source, o eoceswk Capacitor charge olevel fed Peo Cee C9) pac offers a ae te > fe sonfeare® tod-c. ands Tito! ree a thal < Jt allow AC. sml ) Xe b >t (ae mk antes | uk Mabe TARA | Te? fo = peak current Xe fi (ce) f NC > a >: mfinth vet ?st0n@ agra | bs Megfig®@ Ae. Dh Blodes DC. Jn perfect capacitor, current ceadls We velrage 4y & pace angle F Ya or %o* oy, vattage lags Sehmds the current sy ¢ prose angle & th ov 90° F bet KNOW, Efe smut —> Teh sm(or £6) Crreuit Phase (4) Tnpedtence (z) Rane vesisH ve $ro¢ =A Pure Induchve B2-Mr Zz Mp2 ol Pure capachtive b> Ve zere? * Rect proco Ff reachance FS susceptance ig 4 1 Inppedence as Admittance G unit 'mho! or ‘ohm!’ Stemen{s) ’. Sexi 9 Rob chreuy Rg L + LAR are im sexiey Hence same current oft flows in both of them R=Ve zZR Vy * w—| + Pokenfias olifgerence across u Lsy o2K + 2m pure vesist've cireuif , use sous thas €=fosinat Vg is In phase Wht T, + In pure inctuchve chrauth we saw that VW leads T by A> vie vet vte z2Cr axe) v 1 [arene 9 fom blimls Law, s > Vetere’ = 2 (impedence) Ze fpeche resistance 4 Unftsohm (i) T > Prom the phasor eltagran, Applied voltage (VJ Leads the current (DW by phate angle Thu, ange Ves Phe a ¥e RR R dang = WL R ZL currenk wit Se uh same phos + I Leo, dren $20 ( vettage L . oy Reb, eG 240" (vattage ttl Lead the cuvrent by 40‘) 4 CAR ctreuit ip Le cnceutt ar | = VL> Z KE Ps j— Ve ve —| | ee 27 rrr it] en Te fe, sinek vivo sink Vp2 ZR , Ye rtKc ve VnY 2 Lt c v2 Tk Ke) 7 CKO as Me ve Ve. . Vv core ZT (XL>KXe) (vettage leads currenb (> ve) ay Any 2 —_ care B Lx ¢ Xe) (current leads vel¥ege We cve) ty AD) oo Applied! vattege\) lags ° eon carene z by yovenVe clang = Ve > xe i dang 2 Wwe nd Z V cose ase ul > fel (x= Xe). (deo, vattage £ current in same phore J (YW 2 ve) Thus, were a = yee vadle | We Wy cee / —}-—"— mesonant angular freguency yretonant frepuuncy f a He yok Ceanels cach fot) Zr Yoh z Zr ar[yee te) Ve To x ow 0 Teo ay bLee- ; aq R crreuih oy © 8 4 | i JH— Ye pve te] wes vaVe sinwr AV Ve Vv + =z Vieve b Zz ve Ve ve DLR e Cer-¥e)* 2 Rowe (tere) [22 Jat cay) aa eine ang VR ‘ Zo Ws Case Z Coe” CL Xe) 3 Vettage Leads current bY ¢ Qh>ve) , Tad, current leach veléage by > == (weve) T22o sthlwk-ed) Vg 7 > Verte r Ht Pomer In Al Crreur MY Rosisttve Cigcelt (R-drcul) =——_ V>Vp sthwt @ Fa show As both valtage g current are tr same phase, Thus, Power > Rate Gf dissi paton & eneray an elsobyte of rats Po VXT Po Vosmak ¥ Testhute > Vor oon esp P> Veo we | vg. value ff sinuah ove one uycly 2 od [R= Voi J

You might also like