7MF4433-1DA02-2AB1-Z

7MF4433-1DA02-2AB1-Z

7MF4433-1DA02-2AB1-Z

7MF4433-1DA02-2AB1-Z

7MF4433-1DA02-2AB1-Z

传统挤出机采用直流电机驱动。但是直流电机需要定期更换电刷，直流电机耐恶劣环境的能力也较差，有的时候需要独立的干净的冷却空气。日常使用中直流电机的典型故障现象为电刷打火、电枢变色、

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散热不足、剧烈噪声和振动等。因此直流电机的日常维护保养费用比交流电机高得多，直流电机的造价也比交流电机要高。

三、ES300系列变频器用于挤出机的优点

1、ES300系列变频器器采用32位高性能的数字信号处理器（DSP），具有功率因数高、动态响应速度快、控制精度高、噪音低等特点，在提高产品的可靠性和环境的适应性同时，强化了客户易用性和行业专业化的设计，功能更优化、应用更灵活、性能更稳定。为挤出机提供高控制精度、快响应频率及好的动性能。

2、挤出机的工艺要求主要是控制出口的压力恒定，设备在刚开始工作时，进行转速控制，在达到需求压力时，要切换为压力控制。切换过程应该无冲击，需要变频器高的控制精度，来接应压力信号。ES300系列电流矢量控制变频器提供低频高扭矩输出，挤出机的主驱动电机主要通过平行轴斜齿轮减速器减速后带动螺杆转动，在基频以下改变运行速度时为恒转矩调速。  

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