考虑部件振动特性的电炉异步电机电气控制方法

Electrical Control Method for Induction Motors in Electric Furnaces Considering Component Vibration Characteristics

异步电机的驱动系统在运行过程中呈现出高度非线性、强耦合和多变量等特点,转子磁链电压及电流参数难以确定,使得控制误差及稳定性较差。为此,提出考虑部件振动特性的电炉异步电机电气控制方法。通过对电炉异步电机径向磁拉力的分析,了解电炉异步电机部件振动的特性,基于部件振动特性,了解转子磁链电压和电流的变化规律,并将采集到的转子磁链电压及电流信息作为输入信号,提供给PID控制器进行电炉异步电机电气控制。实验结果表明,所提方法的位置控制误差基本为0,电压的控制曲线平稳,说明所提方法精度高稳定性强,具有实用性。

The drive system of asynchronous motors exhibits high nonlinearity,strong coupling,and multivariable characteristics during operation,making it difficult to determine the rotor flux voltage and current parameters,resulting in poor control error and stability.Therefore,a method for electrical control of induction motors in electric furnaces is proposed that considers the vibration characteristics of components.By analyzing the radial magnetic pull force of the induction motor in the electric furnace,the vibration characteristics of the components of the induction motor in the electric furnace are understood.Based on the vibration characteristics of the components,the variation law of the rotor flux voltage and current is understood.The collected rotor flux voltage and current information is used as input signals to provide a PID controller for electrical control of the induction motor in the electric furnace.The experimental results show that the position control error of the proposed method is basically 0,and the voltage control curve is stable,indicating that the proposed method has high accuracy,strong stability,and practicality.