Thyristor selection parameters for 1000kw индукцийн хайлах зуух

Төлөвлөсөн оролтын шугамын хүчдэл нь 380 В бөгөөд дараах өгөгдлийг тооцоолж болно.

DC voltage Ud=1.35×380V=510V

DC current Id=1000000÷510=1960A

Intermediate frequency voltage Us=1.5×Ud =765V

Rated silicon rectifier current IKP=0.38×Id=745A

Rated silicon rectifier voltage UV=1.414×UL=1.414×510V=721V

Инвертер цахиурын нэрлэсэн гүйдэл Ikk=0.45×19600=882А

Инвертер цахиурын нэрлэсэн хүчдэл UV=1.414×Us=1082V

SCR model selection scheme: choose 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.