Mfundo ya chowotcha kutentha: Zofunikira za rectifier trigger circuit

1. Pafupipafupi ndi gawo la kugunda, timagwiritsa ntchito gawo lachitatu la mlatho-mtundu woyendetsedwa bwino ndi rectifier, womwe umagawana zigawo zisanu ndi chimodzi za thyristor. Choncho, chigawo choyambitsa chimafunika kuti chipereke zizindikiro zisanu ndi chimodzi za nthawi (Vg, Vg2, Vg3, Vg4, Vg5, V g6) Ndipo chiyanjano cha magawo asanu ndi limodzi oyambitsa pulse ndi 60 ° mosiyana motsatizana.

2. Pulse m’lifupi ndi m’mphepete mwake: pakuwunika mfundo yogwirira ntchito ya gawo lachitatu la mlatho-mtundu wowongolera wowongolera, zimanenedwa kuti mlatho woyendetsedwa bwino uyenera kukhala ndi ma thyristors awiri nthawi iliyonse, zomwe zimafunikira. kuzungulira kulikonse (360 °) M’kati mwake, payenera kukhala ndi mafunde awiri okha pa nthawi imodzi. Choncho, m’lifupi mwake kugunda kulikonse kuyenera kukhala kwakukulu kuposa T/60 = 60 °, ndipo m’lifupi mwa kugunda kwa choyambitsacho sikuyenera kukhala kwakukulu. Nthawi zambiri, akuyembekezeka kukhala osachepera T/3/120°. Kuti muyambitse bwino, kugunda kwa choyambitsacho kumafunika kukhala ndi malire otsetsereka, koma chifukwa ma frequency a trigger pulse mu dongosolo lomwelo la rectifier ndi otsika (50Hz) ndipo m’lifupi mwake ndi yayikulu (yaikulu kuposa T / 6), ngati zigawo za thyristor sizikulumikizidwa mu mndandanda , Chofunikira pa nsonga yotsogola ya kugunda kwa trigger sipamwamba, malinga ngati zingakhale zosakwana 0.3ms.

3. Mphamvu ya pulse, kuti athe kutsegulidwa kwa thyristor pansi pa kugwiritsidwa ntchito kwa chiwombankhanga, phokoso loyambitsa limayenera kukhala ndi mphamvu inayake. The pazipita choyambitsa voteji ndi pazipita choyambitsa panopa wa elekitirodi ulamuliro chofunika ndi thyristors a mphamvu zosiyana ndi osiyana.

Mwachitsanzo, voteji yothamanga kwambiri ya KP200A ndi 4V, choyambitsa chamakono ndi 200mA, voteji yovomerezeka yopita kutsogolo ndi 10V, ndipo mphamvu yovomerezeka ya pole ndi 2A.

1. Kusintha kwa gawo, kuti athe kuwongolera mphamvu yamagetsi owongolera kuti akwaniritse zofunikira za “malire apano”, “malire amagetsi”, “overcurrent”, “overvoltage”, ndi zina zotero, pamafunika kuti gawo la rectifier pulse lopangidwa ndi kugunda kwa trigger kumatha kukhala mkati mwa “0 ° ~150 ° ”Mkati mwa kukula kwa kusintha.