Ubuchwephesha boMbane Q&A (1.1)

1. Uthini umxholo osisiseko womthetho waseKirchhoff?

(1) Umthetho wokuqala waseKirchhoff, obizwa ngokuba ngumthetho wangoku waseKirchhoff, ongu-KCL, ngumthetho ofunda ubudlelwane phakathi kwemisinga kumasebe ahlukeneyo esekethe. Ichaza ukuba: kuyo nayiphi na i-node kwisekethe, isamba se-current flowing kwi-node ilingana nenani langoku eliphumayo kwi-node. Ukuchazwa kwayo kwezibalo ngu sigma I=0;

(2) Umthetho wesibini we-Kirchhoff ukwabizwa ngokuba ngumthetho we-voltage ye-Kirchhoff, oko kukuthi i-KVL, efunda ubudlelwane phakathi kombane kwiindawo ezahlukeneyo zesekethe. Ibonisa ukuba: kuyo nayiphi na isekethe evaliweyo kwisekethe, i-algebraic sum of voltages kwicandelo ngalinye ilingana no-zero. Inkcazo yezibalo yile: σ U=0;

2. Yintoni umphumo wolusu?

Xa i-alternating current idlula kwi-conductor, ulwabiwo lwangoku alufani kuzo zonke iindawo kwinqanaba lomnqamlezo we-conductor, kunye noxinano oluncinci kumbindi we-conductor, kwaye ubuninzi obukhulu busondele kumphezulu womqhubi. . Le nto yangoku yokusabalalisa idla ngokuba kunye nomphezulu we-conductor, ebizwa ngokuba yi-skin effect.

3. Zeziphi iingqiqo kunye neempawu zeresonance ehambelanayo?

Kwi-parallel circuit ye-inductor kunye ne-capacitor, i-phenomenon yokuba i-terminal voltage ye-parallel circuit ikwisigaba kunye ne-total current ibizwa ngokuba yi-parallel resonance. I-resonance ehambelanayo ibonakaliswe ngoku: xa i-resonance parallel iphunyezwa ngokutshintsha i-capacitance C, i-impedance epheleleyo yesiphaluka iphezulu, ngoko ke i-current ye-circuit yesiphaluka iba yincinci. Kodwa kwisebe ngalinye, umsinga wayo unokuba mkhulu kunomjelo opheleleyo, ngoko i-resonance ehambelanayo ikwabizwa ngokuba yi-resonance yangoku. Ukongeza, kwi-resonance ehambelanayo, ngenxa yokuba i-terminal voltage kunye ne-current iyonke ikwinqanaba elifanayo, amandla ombane wesekethe afikelela kwelona xabiso liphezulu, oko kukuthi, i-cos ilingana no-1, kwaye i-parallel resonance ayiyi kuvelisa i-resonant overvoltage ebeka esichengeni. ukhuseleko lwezixhobo. Ngoko ke, isinika indlela esebenzayo yokuphucula into yamandla.

4. Zenziwa njani iieddies? Yintoni ilahleko yangoku eddy?

Umsinga otshintshayo ugqithiswa kwikhoyili enentsimbi engundoqo, evelisa ukuguquguquka okutshintshileyo kunye nokwenzeka okubangelwa. Ngaphantsi kwesenzo solu buchule, i-core iya kwenza i-self-induced loop yangoku, ebizwa ngokuba yi-eddy current.

Ilahleko yamandla ebangelwa yi-eddy current ibizwa ngokuba yi-eddy current loss.

5.Yintoni inkqubo yotshintsho? Yintoni ebangela inkqubo yotshintsho?

Inkqubo yotshintsho yinkqubo edlulayo, eyinkqubo ethatha ixesha ukusuka kwelinye ilizwe ukuya kwelinye.

Inkqubo yenguqu ngenxa yobukho bezinto zokugcina amandla. Amacandelo okugcina amandla afana ne-inductors kunye ne-capacitors ayikwazi ukuxhuma kwisekethe, oko kukuthi, i-current inductor kunye ne-voltage ye-capacitor ayikwazi ukuguqula inkqubo yokutshintsha. Ngoko ke, kufuneka kubekho inkqubo yokutshintsha ukusuka kwisimo esizinzileyo ukuya kwelinye ilizwe kwisekethe.

6. Uthini umgaqo wokubekwa phezulu?

Kwisekethe yomgca, umsinga (okanye umbane) walo naliphi na isebe sisixa sealgebraic sangoku (okanye i-terminal voltage) eveliswa kwisebe xa imithombo yombane emininzi isebenza ngaxeshanye. Xa usebenzisa umgaqo-siseko we-superposition, umthombo wombane kufuneka uthathwe njenge-short-circuited kunye nomthombo wangoku njengendawo evulekileyo.

7. Ziziphi iingenelo zokusebenzisa i-generator yezigaba ezithathu kunye nezixhobo zokubonelela ngombane?

Umthamo we-generator yesigaba esithathu uncinci kunomnye wesigaba esisodwa xa uvelisa umthamo ofanayo wombane. Kukho imigca embalwa yokuhanjiswa kunye nokuhanjiswa kwesigaba esithathu kuneendlela zokuhambisa kunye nokuhanjiswa kwesigaba esisodwa, ezinokugcina izinto ezininzi. Ukongeza, iimotor zenqanaba lesithathu zisebenza ngcono kuneemotor zenqanaba elinye. Ngoko ke, izixhobo ezinamanqanaba amathathu zisetyenziswa kakhulu.

8. Kutheni le nto inkqubo yocingo enezigaba ezithathu ingasetyenziselwa unikezelo lwamandla eenjini zesigaba sesithathu, ngelixa isistim yocingo olunezigaba ezithathu kufuneka isetyenziselwe umbane wokukhanyisa?

Ngenxa yokuba i-motor yesigaba sesithathu i-symmetrical load yesigaba sesithathu, nokuba yinkwenkwezi okanye uqhagamshelo lonxantathu, idinga kuphela ukudibanisa imigca yesigaba sesithathu se-motor yesigaba sesithathu kwimigca emithathu yonikezelo lwamandla, kwaye ayenzi idinga umgca wesine ongathathi hlangothi, ngoko ke unikezelo lwamandla ombane wesigaba sesithathu lunokusetyenziswa. Umthwalo wombane wokukhanyisa isibane sombane, i-voltage yayo elinganisiweyo yi-voltage yesigaba, isiphelo esinye kufuneka sidityaniswe nomgca wesigaba, isiphelo esinye sidityaniswe nomgca ongathathi hlangothi, ngoko unokuqinisekisa ukuba i-voltage yesigaba ngasinye ayichaphazeli omnye nomnye. ngoko ke kufuneka asebenzise inkqubo yomgca wesigaba sesine, kodwa akuvumelekanga ngokungqongqo ukusebenzisa isibane somhlaba esinye isigaba sokuqala.

Ziziphi iiparamitha eziphambili ze-transistor?

(1) i-amplification factor (β), kukulinganisa amandla okwandisa i-transistor;

(2) umva we-saturation current (Icbo), ebonisa umgangatho we-transistor junction;

(3) I-Penetration current (Iceo), ebonisa ukusebenza kwe-triode.

10. Yintoni ingxelo ye-transistor? Zeziphi iintlobo zeempendulo?

Kwi-transistor amplifier, inxalenye ye-voltage okanye yangoku kwimveliso ibuyiselwa umva kwigalelo ngendlela ebizwa ngokuba yimpendulo.

Kukho iindidi ezimbini zeempendulo: emva kokuqaliswa kwengxelo, i-amplification factor yokwanda kwe-amplifier ibizwa ngokuba yimpendulo enhle, kwaye i-amplification factor iyancipha ibizwa ngokuba yingxelo engalunganga.

11. Ziziphi iisekethe ezidityanisiweyo kunye neesekethe ezidityanisiweyo?

Ukusebenzisa umgaqo wokuba i-voltage phakathi kweziphelo ezimbini ze-capacitor ayinakuguqulwa, isekethe enokutshintsha i-wave rectangular ibe yi-pulse wave ebukhali ibizwa ngokuba yi-different circuit, kunye nesekethe enokutshintsha i-rectangular wave ibe yi-sawtooth wave ibizwa ngokuba yi-integral circuit. .

12. Yintoni indima yesekethe yokucoca?

I-Rectifiers iguqula i-alternating current ukuya ngqo ngoku, kodwa i-waveform emva kokulungiswa iqulethe isixa esikhulu se-ALTERNATING yangoku. Umbane onjalo othe ngqo unokusetyenziswa kuphela kwizixhobo ezineemfuno zamandla aphantsi. Ezinye izixhobo, ezifana nezixhobo zombane kunye neesekethe zolawulo oluzenzekelayo, zifuna ukuba icandelo le-pulsation lonikezelo lwamandla lwe-DC lincinci kakhulu. Ke ngoko, ukuze kuphuculwe umgangatho wombane ohlaziyiweyo kunye nokuphucula i-voltage waveform yesekethe yokuhlaziya, isekethe yesihluzi ihlala ifakelwe ukuhluza icandelo le-AC.

13. Usisebenzisa njani isilungisi esilawulwa yisilicon?

Kwisekethe yokulungisa, i-SCR ngexesha eliphantsi kombane ohamba phambili, tshintsha ixesha lokufaka i-pulse, oko kukuthi, tshintsha ubungakanani be-Angle yokulawula, umthwalo unokufumana amaxabiso ahlukeneyo ombane we-DC, ngaloo ndlela ulawula ubungakanani bemveliso. I-Voltage.

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