Kutadza kuongorora uye kurapwa kwe kudonhedzwa kunyorera vira panguva yekutanga

1. The kudonhedzwa kunyorera vira haigoni kutangwa

Paunotanga, chete DC ammeter ine mirairo, uye hapana iyo DC voltmeter kana yepakati frequency voltmeter ine chero mirairo. Ichi ndicho chimwe chezviitiko zvinowanzoitika zvekukundikana, uye zvikonzero zvinotevera.

Iko kushaikwa kwe pulse phenomenon mu inverter trigger pulse. Shandisa oscilloscope kutarisa inverter pulse (zvichida paGK ye thyristor). Kana paine kushaikwa kwekupuruzira, tarisa kuti kubatana kwacho kwakashata here kana kuvhurika, uye kana paine pulse kubuda mudanho rakapfuura.

Inverter thyristor kuparara. Shandisa multimeter kuyera kushorwa pakati peA neK. Mukusavapo kwemvura inotonhorera, kukosha pakati peA neK kunofanira kuva kwakakura kudarika 10kC, uye kushorwa kwakaenzana ne10kC. Nguva yaparara. Kana maviri acho akakuvadzwa panguva yekuyera, unogona kubvisa imwe yemhangura yemhangura yekubatanidza, uye wozotonga kana imwe kana maviri akakuvadzwa. Dzorera thyristor uye chengetedza chikonzero chekukuvadza kune thyristor (nekuda kwechikonzero chekukuvadza kune thyristor, tapota taurai kuongororwa kunotevera kwechikonzero chekukuvadza kune thyristor). Kuparara kweCapacitor. Shandisa iyo RXlk block ye multimeter kuyera kana imwe neimwe terminal ye capacitor yakachajwa kana kuburitswa kune yakajairika terminal. Kana pasina chinoratidza kuti iyo terminal yakakuvadzwa, bvisa yakakuvadzwa capacitor pole. Mutoro wacho wakapfupika-kutenderera uye wakadzikwa. A 1000V insulation resistance mita (kuzunungusa mita) inogona kushandiswa kuyera kupikisa kwecoil kusvika pasi (kana pasina mvura inotonhorera), uye inofanirwa kunge yakakura kupfuura 1MH, zvikasadaro iyo pfupi-circuit point uye grounding point haifanirwe kuverengerwa. . Iyo sampling yedunhu yepakati frequency chiratidzo ine yakavhurika dunhu kana pfupi dunhu. Shandisa oscilloscope kuona waveform yeimwe neimwe chiratidzo sampling point, kana kushandisa multimeter kuyera kukosha kwekupokana kweyega yechiratidzo sampling loop kana simba radzimwa, uye tsvaga yakavhurika kana pfupi yedunhu poindi. Tarisa pakutarisa iyo yepakati frequency mhinduro yekushandura kuti uone kana iyo yekutanga divi yakavhurika (yakakonzerwa neiyo chaiyo yekubatanidza yekudonha pfungwa).

2. Zvakaoma kutanga

Mushure mekutanga, iyo yepakati frequency voltage inodarika nguva imwe yakakwira kupfuura iyo DC voltage, uye iyo DC ikozvino yakakura kwazvo. Zvikonzero zvekukundikana uku ndezvizvi zvinotevera.

Imwe thyristor mu inverter circuit yakakuvadzwa. Kana thyristor yakakuvadzwa mu inverter circuit, iyo kudonhedzwa kunyorera vira dzimwe nguva inogona kutangwa, asi kukundikana kwataurwa pamusoro kuchaitika mushure mekutanga. Dzorera thyristor yakakuvadzwa uye tarisa chikonzero chekukuvara. Imwe ye inverter thyristors isiri-kuitisa, kureva, “makumbo matatu” basa. Zvingave kuti gedhi re thyristor rakazaruka, kana tambo yakabatana nayo yakasununguka kana kuti ine urombo. Pane dunhu rakavhurika kana kuti polarity isiriyo musampling loop yepakati frequency chiratidzo. Rudzi urwu rwechikonzero runowanzo mumutsara unotora nzira yemakona. Vhura dunhu reyepakati frequency voltage siginecha kana reverse polarity yepakati frequency voltage chiratidzo kana uchigadzirisa zvimwe zvikanganiso zvinokonzeresa ichi chikanganiso. Iyo yekumberi angle phase shift shift yeinverter yatadza. Kuremerwa kweyepakati frequency simba rekupa capacitive, ndiko kuti, ikozvino inotungamira voltage. Mune sampling control circuit, phase shift shift inogadzirwa. Kana iyo phase shift yedunhu ikatadza, zvinokonzeresa kusashanda uku.

3. Kunetsa kutanga

Mushure mekutanga, iyo yakanyanya DC voltage inogona chete kusimudzwa kusvika 400V, uye reactor inodedera zvine ruzha uye ruzha rwakadzima. Kukundikana kwerudzi urwu kukundikana kwebhiriji-chikamu-chakazara-chinodzora kugadziridza, uye zvikonzero zvikuru ndezvinotevera.

Iyo inodzoreredza thyristor ine yakavhurika dunhu, kuparara, kupfava kuparara kana kuita degradation yemagetsi paramita. Shandisa oscilloscope kuona iyo tube voltage inodonha waveform yega yega inogadzirisa thyristor, tsvaga yakakuvadzwa thyristor uye itsiva. Kana iyo yakakuvadzwa thyristor inoputsika, yayo chubhu voltage donhwe waveform mutsara wakatwasuka; mukuputsika kwakapfava, kana voltage ichikwira kune imwe kukosha, inova mutsara wakatwasuka. Kana iyo parameter yemagetsi inodonha, waveform inoshanduka kana voltage ichikwira kune imwe kukosha. Kana chiitiko chiri pamusoro chikaitika, iyo DC ikozvino ichagurwa, zvichiita kuti reactor izunguze. Seti yezvakagadziridzwa zvinokonzeresa pulses haipo. Shandisa oscilloscope kutarisa yega yega inokonzeresa kupomba zvakasiyana (zviri nani kutarisa pane thyristor). Paunenge uchitarisa dunhu pasina kupuruzira, shandisa yekumashure yekusundidzira nzira kuti uone nzvimbo yekukanganisa uye kutsiva iyo yakakuvadzwa chikamu. Kana ichi chiitiko chikaitika, iyo inobuda wave musoro weDC voltage inoshaya musoro wewave, zvichiita kuti ikozvino igurwe, zvichikonzera kutadza kwechiitiko ichi. Gedhi rekugadzirisa thyristor rakazaruka kana kupfupika-kutenderera, zvichiita kuti thyristor irege kukonzerwa. Kazhinji, kukosha kwekupikisa pakati peGK ndeye 10 ~ 30Q.

4. Mira pakarepo mushure mekutanga

Inogona kutangwa, asi inomira pakarepo mushure mekutanga, uye induction yekunyunguduka yevira iri mumamiriro ekudzokorora kutanga. Kukundikana uku kutadza kweiyo induction yakanyunguduka vira ine sweep-frequency start mode, uye zvikonzero zvinotevera.

Iyo inotungamira kona idiki, uye inodzokororwa kutanga inokonzerwa nekutadza kwekufamba mushure mekutanga. Nekutarisa yepakati frequency voltage waveform ine oscilloscope, wedzera inverter lead angle zvakakodzera.

Iyo inotakura oscillation frequency siginecha iri pamucheto chinzvimbo chekunze kwekunakidzwa kwekutarisa frequency chiratidzo renji. Gadzirisa zvakare iyo scanning range yeimwe excitation scanning frequency.

5. Overcurrent rwendo mushure mekutanga

Mushure mekunge iyo induction yakanyunguduka choto chatangwa, kana simba richikwira kune imwe kukosha, iyo induction yakanyunguduka choto inowanzoitika kune yakawandisa kudzivirira chiito, uye dzimwe nguva thyristor ichapiswa kunze uye kutangazve, chiitiko chinoramba chakafanana. Ichi chiitiko chekutadza kazhinji chinokonzerwa nezvikonzero zvinotevera.

Kana overcurrent inogona kuitika pasi pemhepo yakaderera ichangotanga, inokonzerwa nekuti iyo kona yepamberi ye inverter idiki uye inverter thyristor haigone kuvharwa zvakavimbika.

Mvura inogurwa kana kupisa kwekupisa kunoderedzwa mumvura inotonhorera jekete ye inverter thyristor. Tsiva bhachi rinotonhorera remvura. Dzimwe nguva zvakakwana kuona kubuda kwemvura uye kumanikidzwa kwejasi rekutonhora kwemvura, asi kazhinji nekuda kwezvinetso zvehutano hwemvura, chiyero chechiyero chinosungirirwa kumadziro ejasi rekutonhora kwemvura. Nokuti chiyero chinhu chine urombo hwakanyanya hwekupisa conductivity, kunyange kune mvura yakakwana inoyerera Zvisinei, kupisa kwekushisa kunoderedzwa zvakanyanya nekuda kwekuparadzaniswa kwechiyero. Nzira yekutonga ndeyokuti: shandisa simba pane simba rakaderera kudarika-over-current value for about 10 minutes, uye nekukurumidza kuvhara, uye nekukurumidza kubata nheyo ye thyristor neruoko rwako mushure mekuvhara. Kana iwe uchinzwa kupisa, kukanganisa kunokonzerwa nechikonzero ichi.

Waya dzekubatanidza dzetangi redunhu dzine kusabatana kwakashata uye kubviswa. Tarisa mawaya ekubatanidza etangi redunhu uye gadzirisa zvinoenderana nemamiriro chaiwo. Kana iyo tambo yekubatanidza yetangi redunhu iine kutadza kubata kana kubviswa, simba rinokwira kune imwe kukosha, rinokonzeresa kupisa, izvo zvinokanganisa kushanda kwakajairwa kweiyo induction kunyunguduka kwevira, izvo zvinotungamira kune kuchengetedzwa kwekunyungudika kweiyo induction. choto. Dzimwe nguva nekuda kwekupenya, kuwedzeredza kwepakarepo kunogadzirwa kumigumo yese ye thyristor. Kana iyo overvoltage yekudzivirira chiito yakanonoka, zvikamu zve thyristor zvichapiswa. Chiitiko ichi chinowanzokonzera zviito panguva imwe chete ye overvoltage uye overcurrent.

6. Hapana mhinduro pakutanga

Kana iyo induction inonyungudika choto inotanga, hapana mhinduro. Mushure mekutarisa, kushaikwa kwechikamu chechiratidzo chechiedza pane control circuit board chiripo. Kukundikana uku kunokonzerwa nezvikonzero zvinotevera: kukurumidza fuse inoputika. Kazhinji fuse inokurumidza ine chiratidzo chekubatanidza, unogona kutonga kana fuse yakatsva nekutarisa chiratidzo, asi dzimwe nguva nekuda kwekushandisa kwenguva refu yekukurumidza fuse kana zvikonzero zvemhando, chiratidzo hachina kujeka kana chiratidzo hachina kujeka, iwe. inoda kudimbura simba kana kushandisa multimeter kuyera. Nzira yekurapa ndeye: shandura fuse inokurumidza uye ongorora chikonzero chekurova. Zvikonzero zvakajairika zvekufuridza fuse nekukurumidza ndezvizvi zvinotevera. The kudonhedzwa kunyorera vira inomhanya pasi pemamiriro ehukuru hwesimba uye yakakwirira ikozvino kwenguva yakareba, zvichiita kuti fuse inokurumidza kuunza kupisa, izvo zvinoita kuti fuse core inyauke. Iyo rectifier mutoro kana yepakati frequency kuremerwa ipfupi-inotenderera, zvichikonzera ipapo ipapo yakakwirira yazvino kukanganisa uye kupisa iyo inokurumidza fuse. Dunhu remutoro rinofanira kuongororwa. Iko kutadza kweiyo rectifier control seketi kwakakonzera pakarepo high current kukanganisa. Iyo rectifier yedunhu inofanirwa kuongororwa.

Iko kubata kweiyo main switch inopiswa kunze kana yekumberi-level magetsi system ine kutadza kwechikamu. Shandisa iyo AC voltage block yemultimeter kuyera mutsara wemagetsi ega rega rega kuti uone nzvimbo yekukanganisa.