In this study, an experimental application has been improved for three phase synchronous motor including observation and control the motor speed by adjusting the frequency. A DAQ (Data Acquisition Card) has been used in the system as controller. Interface program has been prepared in Visual C#.NET platform which has more visual components and provides data exchange safely. Thanks to this interface program, users can easily observe most parameters of synchronous motor such as current, voltage, power factor, frequency, torque and speed. Furthermore, start-stop operations of the motor, frequency and speed control by a frequency convertor can be achieved as computer controlled. Thus, an interactive educational set is obtained that shows frequency-speed relation of three phase synchronous motor over a visual interface.