双向晶闸管无触点可逆开关保护系统研究

Study on Protection System of Triacs as Non-contact Reversible Switch

大型轧钢机交流电机用的正反转无触点控制开关已被广泛采用。如何选择无触点开关的关键器件——双向晶闸管的参数和有效地保护线路是保证轧钢机正常运行的关键,文中就这一问题做了简明扼要的阐述。

Triacs,as non-contact reversible switch is widely used in heavy rolling mill,for it has many advantages, such as no noise, no contact burnt damage and long lifetime.How to select the triacs correctly is very important because the triacs is the key parts of the non-contact reversible switch and its parameters and the valid protection circuit can ensure the rolling mill work smoothly. This article makes a terse and concise discussion on this problem.