Thyristor selection parameters for 1000kw relau lebur induksi

Voltan talian masuk yang direka bentuk ialah 380V, dan data berikut boleh diperoleh dengan pengiraan:

Voltan DC Ud=1.35×380V=510V

DC current Id=1000000÷510=1960A

Voltan frekuensi pertengahan Us=1.5×Ud =765V

Arus penerus silikon berkadar IKP=0.38×Id=745A

Voltan penerus silikon berkadar UV=1.414×UL=1.414×510V=721V

Arus berkadar silikon penyongsang Ikk=0.45×19600=882A

Inverter silicon rated voltage UV=1.414×Us=1082V

Skim pemilihan model SCR: pilih Xiangfan Taiji SCR:

Because it adopts 6-pulse single rectifier output, the rectifier SCR selects KP2000A/1400V (a total of 6), that is, the rated current is 2000A and the rated voltage is 1400V. Compared with the theoretical value, the voltage margin is 1.94 times and the current margin is 2.68 times.

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.