Polarity le boleng ba SCR e ka ahloloa ka multimeter ea pointer kapa multimeter ea dijithale. Yunnan Changhui Instrument Manufacturing Co., Ltd. ka thoko e hlahisitse ts’ebeliso ea li-multimeter tse peli molemong oa ho metha polarity le boleng ba SCR.

1. Sebelisa multimeter ea pointer ho hlahloba polarity le boleng ba SCR

Ho latela molao-motheo oa mateano a PN, khanyetso lipakeng tsa lipalo tse tharo tsa thyristor e ka lekanyetsoa ke “ohmic block” R × 10 “kapa” R × 100 “block ho ahlola hore na e ntle kapa e mpe. Ho na le mateano a PN lipakeng tsa electrode ea taolo G le cathode K ea thyristor. Tlas’a maemo a tloaelehileng, khanyetso ea eona ea pele e lipakeng tsa li-ohms tse mashome ho isa ho li-ohms tse makholo, ‘me ho hanyetsa ka morao hangata ho hoholo ho feta ho hanyetsa pele. Ka nako e ‘ngoe khanyetso e lekantsoeng ea pole ea taolo e nyane, e sa boleleng hore palo ea taolo e na le litšobotsi tse mpe. Haholo-holo ho latela hore na e kopana le litšobotsi tsa mateano a PN.

2. Sebelisa multimeter ea dijithale ho lekola polarity le boleng ba SCR

Ahlola li-multimeter tsa dijithale tsa thyristor ho diode block, hokela teko e khubelu e lebisa ho eleketrode e le ‘ngoe,’ me teko e ntšo e lebisa ho ikopanye le li-electrode tse ling tse peli ka tatellano. Haeba e ‘ngoe ea tsona e bontša hore voltage ke likarolo tse’ maloa tsa volt, joale teko e khubelu ea teko e hokahane le elektrode ea taolo ea G, lead lead e ntšo e hokahane le cathode K, ‘me e setseng ke anode A. Haeba e bontša ho khaphatseha makhetlo a mabeli, ho bolela hore lead e khubelu ea liteko ha e hokahane le elektrode ea taolo, mme eleketrode e hloka ho nkeloa sebaka le ho lekoa bocha.

Ho leka bokhoni ba ho thunya ba thyristor, multimeter ea dijithale e hlophiselitsoe PNP block. Nakong ena, masoba a mabeli a E ka soketeng ea hFE a lefisitsoe hantle, ‘me lesoba la C le lefisitsoe hampe,’ me motlakase ke 2.8V. Li-electrode tse tharo tsa thyristor li nts’oa ka terata, anode A le cathode K lead li kenngoa ka mekoting E le C ka ho latellana, ‘me motlakase oa taolo G oa emisoa. Ka nako ena, thyristor e tinngoe, anode hajoale ke zero, mme 000 e tla bonts’oa.

Kenya palo ea taolo G ka lesoba le leng la E. Boleng bo bontšitsoeng bo tla nyoloha ka potlako ho tloha ho 000 ho fihlela letshwao la khaphatseha le bonts’oa, ebe le fetohela ho 000 hanghang, ebe le fetoha ho tloha ho 000 ho ea khaphatseha hape, joalo-joalo. Mokhoa ona o ka sebelisoa ho fumana hore na ts’ebetso ea thyristor e ka tšeptjoa. Leha ho le joalo, nako ea teko e lokela ho khutsufatsoa ka hohle kamoo ho ka khonehang ka lebaka la hona joale e batlang e le kholo tekong e joalo. Haeba ho hlokahala, ts’ireletso ea li-ohm tse makholo a ‘maloa e ka hokahanngoa ka tatellano ho anode ea SCR.

Haeba block ea NPN e sebelisoa, anode A ea thyristor e lokela ho hokahanngoa le lesoba C, le cathode K ho lesoba E ho netefatsa hore motlakase o sebelisitsoeng pele ke. Ha o hlahloba bokhoni ba ho tsosa, u se ke ua kenya eleketrode ea taolo ka mokoting oa B, hobane matla a mokoti oa B a tlase, mme SCR e ke ke ea buloa.