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我厂初轧机由两台A6870F/16型电动机驱动。随着生产的发展,辊径在逐步增大,轧制道次一再压缩,目前主电机已在满负荷下运行,其控制系统的掉电电流(10500安)和跳闸电流(13500安)是恒定的,而初轧辊的辊径却在1180～1080毫米间变化。这种条件势必引起下述不良后果: 第一,当其余轧制工艺条件恒定时,大辊径轧制则轧制力矩将随之加大,即使钢锭的轧制温度正常,也引起掉电打回,
I mill at the beginning by two A6870F / 16 motor drive. With the development of production, the roller diameter is gradually increased and the rolling passes are compressed again and again. At present, the main motor has been operating at full load. The control system’s power-down current (10500A) and trip current (13500A) are constant , While the roll diameter of the first roll changes between 1180 and 1080 mm. This condition is bound to cause the following adverse consequences: First, when the rest of the rolling process conditions are constant, the rolling of large diameter rolling moment will be increased, even if the ingot rolling temperature is normal, it also led to power down Back,