前端带小电容整流器的感应电机变频驱动控制

Variable Frequency Drive Control of Induction Motor with Small Capacitor and Front-end Diode Rectifiers

前端由不控整流器供电的感应电机变频驱动系统中,直流侧电容容值高、体积大,从而系统可靠性降低。为了提高系统功率密度和可靠性,设计了一种带小电容二极管整流器供电感应电机变频驱动系统的新型复合控制器,其结构在磁场定向电机模型控制的基础上结合使用了电压矢量边界控制模块,同时还采用了一种无速度传感器控制的转子位置估计算法。此外,还分析了控制算法对电机参数扰动的鲁棒性,并设计了状态滤波器。搭建了1.5 k W感应电机驱动试验平台,并采用20μF容值的电容进行了试验验证,试验结果表明了新型控制器的具有较好的性能。

The induction motor drive system which is powered by an uncontrolled rectifier always has a larger capacitance, so the system reliability reduced. In order to improve the system power density and reliability, a new type of composite controller was designed for an induction motor driving system with small capacitance diode rectifier power front-end, and the structure of the controller was combined with the voltage vector boundary control mode and the field oriented motor model control mode. And the rotor position was estimated in the algorithm, so it belongs to the speed seusorless control scheme. In addition, the robustness of the controller to the motor parameters drift was also analyzed, and the state fiher was designed. The 1.5 kW induction motor drive test platform with the capacitance of 20 μF was built, anti some tests have been done. The experimental results verify the performances of the new controller.