Greetings: The application is 3 phase variable frequency ac induction motor drive using IR IGBT. After long reserach we came to a conclusion that the pic might not be the absolute choice for the above project, however we insist to develop the project with the PIC. My objective is to create a table which can generate: a)0.5 hz per step (240 steps equal to 120 Hz) b)1volt per step (240 steps equal to 240 V) c)Linear ratio V/F app equal to 2 as much as possible Has anybody done such an algorithm and implemented it using the PIC? I am very interested to cooperate? regards, Norayr S. Elmayan