Abin da rawa igiyoyin

Lokacin da karatu cikin muhimmai daga Banana a daya mataki dole a ɗauke rawa igiyoyin da voltages. Wadannan mamaki ne muhimmi a haihuwarka AC da kuma na iya zama ko dai a ke so bukata da su a cikin asusun a cikin kwaikwaiyo da ikon sharuddan sauyawa haihuwarka da kuma amfani.

Alal misali, rawa a AC kewaye ne sau da yawa amfani da rediyo: saurare oscillation kewaye dangane da wani rawa irin ƙarfin lantarki, shi damar sau da dama ya fadada low ikon rediyo sigina, tun saboda canji "capacitance-inductance" ne mai girma tasiri danniya dabi'u.

Ya ce oscillation kewaye - shi ne tushen fahimtar yadda da rawa halin yanzu da kuma (ko) danniya. Shi ne rufaffiyar lantarki kewaye kunshi wani capacitor da alaka a layi daya (C tank) da kuma nada (inductance L). A cikinsu ta hanyar aiwatar da "famfo" makamashi na capacitance na lantarki filin a cikin Magnetic filin akwai kai-extinguishing inductance (saboda da gaban da resistive bangaren R) hawa da sauka daga wani mita.

A resonant yanayin kewaye juriya ga nassi na yanzu aiki bangaren wakilta R. Akwai kawai rawa halin yanzu da kuma rawa irin ƙarfin lantarki. La'akari da su fasali.

Rawa halin yanzu auku a cikin da'ira a layi daya da switched capacitor da nada, wanda ratings aka zaba don haka da cewa yanzu na C da kuma L ne halin yanzu. A sakamakon «CL» darajar yanzu a kewaye shi ne ya fi a total sarkar.

Ka'idar aiki ne kamar haka: a ikon up, da cajin jari condenser (ga wani maras muhimmanci samar ƙarfin lantarki). Bayan wannan shi ne isa ya cire haɗin tushen da kuma kammala rangadi zuwa da kewaye da su fara aiwatar da fitarwa zuwa nada. A halin yanzu wucewa ta hanyar shi ya haifar da wani Magnetic filin da ya haifar da da kai-shigar da electromotive karfi, oppositely directed halin yanzu. Its iyakar darajar da aka kai a lokacin da cikakken fitarwa na capacitor. Haka kuma, wannan yana nufin cewa dukan damar da makamashi tara a cikin Magnetic filin ne sāke inductance. Duk da haka, saboda kai-shigar da nada motsi na cajin barbashi aka tsaya.

Tun da counterflow daga capacitor ne babu mafi (ya ne tikis), ta fara faru recharged, amma tare da wani daban-daban polarity. A sakamakon haka, duk filin nada aka tuba zuwa ga cajin capacitor da kuma aiwatar maimata da ita. Saboda gaban ciki resistive bangaren R faruwa hankali Fading hawa da sauka. Saboda haka, yanzu rawa aka yi.

Rawa danniya auku a cikin jerin dangane da resistor R, wata nada L kuma wani capacitor C. An muhimmanci alama ne da cewa da ikon samar da irin ƙarfin lantarki ne m fiye da capacitor da nada (a kowane kashi dabam), amma daidaita halin yanzu an kiyaye. Bugu da ƙari, cikin irin ƙarfin lantarki da kuma na yanzu ne, a lokaci. Babban sharadin da fitowan da kuma goyon baya na wannan tsari - da daidaitakar inductive kuma capacitive reactance. Haka kuma, da impedance aka samu ya zama aiki.

Don sanin ko tasiri dabi'u na ƙarfin lantarki a fadin nada da kuma capacitor ana amfani Ohm ta dokar. A harka shi ne daidaita da samfurin na nada yanzu zuwa da inductive reactance (U1 = IX1). Haka kuma, yanzu ga capacitor dole ne su yawaita da capacitance (U2 = IX2). Tun a cikin jerin dangane da abubuwa na yanzu ne, kuma ga rawa x1 = x2 ƙarfin lantarki a fadin inductance da capacitance ne daidai. Saboda haka, kara amsawa da aka gyara, za ka iya cimma wani gagarumin karuwa a irin ƙarfin lantarki U1 da U2, yayin da rike m dabi'u na EMF Madogararsa. Babban yankin na aikace-aikace - a rediyo aikin injiniya.