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。

This paper introduces unusual vibration and noise test of 135 model variable-speed unit on closed test bench of electric power . It analyzes test data in detail by using dynamic signal analysis software .

着重介绍135型 变速 器在电功率封闭试验台上进行的异常振动、噪声试验与测试，并利用动态信号分析软件对试验数据进行了较为详尽的分析。