Vigezo vya uteuzi wa Thyristor kwa 1000kw induction melting tanuru

Voltage iliyoundwa ya laini inayoingia ni 380V, na data ifuatayo inaweza kupatikana kwa hesabu:

DC voltage Ud=1.35×380V=510V

Kitambulisho cha sasa cha DC=1000000÷510=1960A

Voltage ya masafa ya kati Us=1.5×Ud =765V

Kirekebisha silicon kilichokadiriwa sasa IKP=0.38×Id=745A

Voltage ya kirekebisha silikoni iliyokadiriwa UV=1.414×UL=1.414×510V=721V

Inverter silicon rated current Ikk=0.45×19600=882A

Silicon ya kigeuzi ilikadiriwa voltage UV=1.414×Us=1082V

Mpango wa uteuzi wa mfano wa SCR: chagua Xiangfan Taiji SCR:

Kwa sababu inachukua pato la 6-pulse moja rectifier, rectifier SCR huchagua KP2000A/1400V (jumla ya 6), yaani, sasa iliyopimwa ni 2000A na voltage iliyopimwa ni 1400V. Ikilinganishwa na thamani ya kinadharia, ukingo wa voltage ni mara 1.94 na ukingo wa sasa ni mara 2.68.

The inverter thyristor selects KK2500A/1600V (four in total), that is, the rated current is 2500A, and the rated voltage is 1600V. Compared with the theoretical value, the voltage margin is 1.48 times, and the current margin is 2.83 times.