DSP-Based Real Time 3-Phase Signal Generator

During the performance evaluation of 3-phase control systems synchronization in real time, it is useful to synthesize test signals with modulated characteristics, such as frequency, phase, un-balancing, distortion, notching, and random noise. The principles and structure of a proposed generic program in the C language are presented, which can be easily adapted and compiled for any target DSP platform. The proposed structure offers such advantages as the ability to easily create a precompiled library of elementary, re-usable, building blocks, which can subsequently be easily "inter-connected", equivalently as it would be done physically; these connections can easily be re-configured at run time, allowing for variable operating parameters; the actual application coding can then be greatly simplified. In contrast to graphical design programs and object oriented languages, which often serve a limited number of target processors and reduce the efficiency of the compiled program with significant additional overhead code, the proposed approach is accomplished in the C language, using elementary constructs such as structures, variable and function pointers. An example application program is presented, as well as representative synthesized waveforms