High frequency cycloconverter control

A 6-pulse noncirculating current cycloconverter (833 Hz to 50 Hz) is used as frequency changer for a high-frequency permanent magnet generator. This generator-power converter unit is driven by a high efficiency, high-speed gas turbine in the power range of 250 kW to 870 kW. This system is intended for use in total energy systems or hybrid systems in vehicles and high speed vessels. A new vector control-like digital control strategy and a special discrete Fourier filter (DFT), intended for use with a one-phase version of the cycloconverter, are described. Both are implemented in a multi-processor digital controller used for feedback control and pulse-pattern generation, Simulation results and measurements of a laboratory one-phase version of the power converter and a dummy-generator, using this digital control strategy and DFT, are given.<>