Researching on multiple "Phase Hopping" AC-AC frequency conversion circuit

Power energy occupies a very central position in all clean energy, and our country also puts a considerable amount of resources in the research and development of electric power. In actual industrial production, the most obvious measure to response the slogan of saving resources actively is the use of cycloconverter. The main characteristics of the motor working condition can be fully used according to this technology. It can not only reduce energy consumption, but also can make performance of the motor in the state of starting improved on a certain basis and accuracy of the motor and load device has great improvement when working state. "Phase hopping" cycloconverter is developed based on traditional cycloconverter. It can increase the output frequency to close to the line frequency, and has the advantages of no circulation current and no dead zone. By combining multiple-stage cycloconverters technology, "phase hopping" cycloconverter can regulate the output voltage and output frequency at the same time. Relative to current frequency converters, it has advantages of large capacity, high voltage level and low cost. The fundamental idea of "phase hopping" is introduced based on the reverse parallel bridge circuit. Taking a sixfold circuit as an example, all of possible voltage results are analyzed according to the voltage vector superposition method, the scope of the voltage variation is summarized from the results. Four groups are chosen as instance and performed simulation with MATLAB in the condition of constant voltage to frequency ratio. Then an experimental platform is set up and the experimental analysis has been carried on. The experimental results are in good agreement with theoretical and simulation studies.