One of hot-rolling mill main driving motor is an AC-AC variable-frequency variable-speed non-salient pole synchronous motor from SIEMENS, the motor power is 12000 kW, which is now the largest single unit capacity in China. 热轧厂的一台主传动电机采用西门子交交变频调速隐极式同步电机。电机功率12000kW,是目前国内单台容量最大的轧机。