Mathematica是一款科学计算软件，很好地结合了数值和符号计算引擎、图形系统、编程语言、文本系统、和与其他应用程序的高级连接。很多功能在相应领域内处于世界领先地位，它也是使用最广泛的数学软件之一-Mathematica is a scientific computing software, a good combination of numerical and symbolic computing engine, graphics systems, programming language

Space Vector PWM The space vector PWM (SVM) method is an advanced computation-intensive PWM method and is possibly the best method among the all PWM techniques for variable-frequency drive application. Because of its superior performance characteri