摘 要：探讨了一种采用RS485串口与变频器通讯方式来获得任意指定电压和频率的控制方法，从而实现商用变频器对无刷双馈电机电动和发电运行控制。Master430/440变频器具有特殊曲线可编程的V/F控制方式，修改3点可编程电压坐标可以实现变频器输出任意频率和电压的交流电。
Abstract: This paper discussed the method of RS485 serial port communication with a commercial inverter to obtain any specified voltage and frequency.Then it can achieve commercial inverter for brushless doubly-fed operation control and power generation.The siemens master430/440 inverter has a special programmable V/F control mode,it can modify the three programmable coordinates of voltage and frequency to realize arbitrary frequency and voltage AC.
Key Words: Brussless doubly-fed machine；Commercial inverter；RS485;Control
