Title :
Digital modulator for forced commutated cycloconverters with input power factor correction
Author :
Huber, László ; Borojevic, Dusan
Author_Institution :
Inst. for Power & Electron. Eng., Novi Sad Univ., Yugoslavia
Abstract :
A simple geometric representation in the complex plane of the output voltage-input current space vector modulation technique for forced commutated cycloconverters (FCCs) is given. By simultaneous observation of the reference voltage and current vector in the FCC inverter and rectifier hexagon, respectively, selection of the switching combinations as well as determination of their on-times can be easily followed. Design and digital implementation of the modulator, using a microprocessor system with reduced real-time computation is described. The resultant output voltages and input currents, obtained on an FCC laboratory prototype, are sinusoidal, practically without low-frequency harmonics. Maximal voltage gain (√3/2) and controllable input displacement factor are achieved
Keywords :
commutation; cycloconvertors; digital control; invertors; microcomputer applications; modulation; power factor correction; real-time systems; rectifiers; switching circuits; voltage control; current space vector modulation; current vector; digital control; forced commutated cycloconverters; microprocessor; on-times; power factor correction; real-time; rectifier; reference voltage; switching; voltage control; voltage gain; Digital modulation; Displacement control; FCC; Inverters; Laboratories; Microprocessors; Prototypes; Real time systems; Rectifiers; Voltage;
Conference_Titel :
Industrial Electronics, Control, Instrumentation, and Automation, 1992. Power Electronics and Motion Control., Proceedings of the 1992 International Conference on
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-0582-5
DOI :
10.1109/IECON.1992.254503
