CONGNGHE12 - Cuộn cảm

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<p>CONGNGHE12</p> <p>Wiki Home Recent Changes Pages and Files Members Search</p> <p>Cun cmCUN CM1. Cng dng</p> <p>Edit</p> <p>15</p> <p>7</p> <p> All Pageshome Vai tr v trin vng ca k thut in t in tr T in Cun cm it bn dn Tranzitor Tirixto (SCR) Tric Quang in t Vi mch t hp ic Mch chnh lu cu Mch chnh lu hnh tia Mch chnh lu na chu k Mch khuch i H thng thng tin v vin thng Mn hnh LCD Mn hnh Plasma Mn hnh n ng CRT see more</p> <p>Trong k thut in t, cun cm thng dng dn dng in mt chiu, chn dng in cao tn v khi mc phi hp vi t in s hnh thnh mch cng hng.</p> <p>2. Cu toNgi ta dng dy dn in qun thnh cun cm.</p> <p>external image cuonday2.jpg external image cuonday.jpg</p> <p>3. Phn loiTy theo cu to v phm vi s dng, cun cm c phn loi nh sau: Cun cm cao tn, cun cm trung tn, cun cm m tn.</p> <p>4. K hiu 5. S liu k thut ca cun cma) Tr s in cm: cho bit kh nng tch ly nng lng t trng ca cun cm khi c dng in chy qu. Tr s in cm ph thuc vo kch thc, hnh dng, vt liu li, s vng dy v cch qun dy. n v o l henry (H), cc c s thng dng l: 1mili henry(mH)= 10^-3 H 1 micro henry =10^-6 H b) Cm khng ca cun cm X(L): l i lng biu hin s cn tr ca cun cm i vi dng in chy qua n XL= 2 x 3.14 x f x L trong : - XL: cm khng . n v l -f : l tn s n v l Hz -L : l h s t cm , n v l Henry</p> <p>Th nghim v cm khng ca cun dy vi dng in xoay chiu Th nghim trn minh ho : Cun dy ni tip vi bng n sau c u vo cc ngun in 12V nhng c tn s khc nhau thng qua cc cng tc K1, K2 , K3 , khi K1 ng dng in mt chiu i qua cun dy mnh nht ( V XL = 0 ) =&gt; do bng n sng nht, khi K2 ng dng in xoay chu 50Hz i qua cun dy yy hn ( do XL tng ) =&gt; bng n sng yu to i, khi K3 ng , dng in xoay chiu 200Hz guest i qua| cun Join |dy Help yu | Sign nht In( do XL tng cao nht) =&gt; bng n sng yu Welcome. Learn more about what Wikispaces has offer. nht. =&gt; Kt lun : Cm khng ca cun dy t l vi h s t cm ca cun dy v t l vi tn s dng in xoay chiu, ngha l dng in xoay chiu c tn s cng cao th i qua cun dy cng kh, dng in mt chiu c tn s f= 0 Hz v vy vi dng mt chiu cun dy c cm khng XL=0</p> <p>Nhn xt:</p> <p>- Nu l dng in 1 chiu (f=0) lc ny XL=0. CUn cm l tng c r=0 khng cn tr dng in 1 chiu.- Nu l dng xoay chiu, tn s f cng cao th XL cng ln. Nh vy cun cm cn tr dng in xoay chiu. DO ngi ta cn gi l cun cn cao tn hoc cun chn cao tn.c) H s phm cht Q: c trung cho tn hao nng lng trong cun cm, l t s ca cm khng ( in khng) vi in tr thun (r) ca cun cm mt tn s (f) cho trc: Q= 2 x 3.14 x f x L/r</p> <p>6) Tnh cht np x ca cun cmCun dy np nng lng : Khi cho mt dng in chy qua cun dy, cun dy np mt nng lng di dng t trng c tnh theo cng thc W = L.I 2 / 2 W : nng lng ( June ) L : H s t cm ( H ) I dng in.</p> <p> th nghim trn : Khi K1 ng, dng in qua cun dy tng dn ( do cun dy sinh ra cm khng chng li dng in tng t ngt ) v vy bng n sng t t, khi K1 va ngt v K2 ng , nng lng np trong cun dy to thnh in p cm ng phng ngc li qua bng n lm bng n lo sng =&gt; l hin tng cun dy x in.</p> <p>T Ngc T Uyn Lp 12A</p> <p>Help About Blog Pricing Privacy Terms Support Upgrade Contributions to http://congnghe12.wikispaces.com/ are licensed under a Creative Commons Attribution Share-Alike 3.0 License. Portions not contributed by visitors are Copyright 2013 Tangient LLC</p>