感应交流电机变频调速器自动化稳态控制技术

Automatic Steady State Control Technology of Induction AC Motor Variable Frequency Governor

针对变频调速器控制电路中参数动态变化特性较强、电机稳定特性难以捕捉及固有互感关系较差问题,提出一种基于变频调速器的自动化稳态控制技术。根据电机内定子及转子的感应矩阵,建立电机内部电力参数的动态变化数学模型,计算二者间互感关系变动时对电路稳态的影响,推导互感矩阵。以变频控制器作为自动化控制应用载体,根据电路的实时数据,调节变频参数,用于反馈不稳定性信号,并采用变频控制器自动输出控制数值,建立无功补偿函数,根据功率、电压及电流值的减少量,进行定量补偿,完成感应交流电机变频调速器自动化稳态控制。实验数据表明,所提方法应用下,电压和电流分布较为规律,功率输出结果较为稳定、均衡,对电路稳定改善效果较佳。

Aiming at the problems of strong dynamic change characteristics of parameters in the control circuit of variable frequency governor,being difficult to capture the stability characteristics of motor and poor inherent mutual inductance,an automatic steady-state control technology based on variable frequency governor is proposed.According to the induction matrix of the stator and rotor in the motor,the dynamic change mathematical model of the internal power parameters of the motor is established,the influence of the mutual inductance relationship among the two on the circuit stability is calculated,and the mutual inductance matrix is derived.The variable-frequency controller is used as the application carrier of automatic control.According to the real-time data of the circuit,the variable-frequency parameters are adjusted to feed back the unstable signals.The variable-frequency controller is used to automatically output the control value,establish the reactive power compensation function,and make quantitative compensation according to the reduction of power,voltage and current value to complete the automatic steady-state control of the induction AC motor variable-frequency governor.The experimental data show that the voltage and current distribution are more regular,the power output is more stable and balanced,and the improvement effect on circuit stability is better.