This study explains the mechanism of generation of non-characteristic harmonics in three-phase systems supplying dc chopper controlled loads. The results presented will enable designers to predict the current harmonic spectrum on ac lines and to evaluate the impact of chopper load upon the converter transformer and the distribution system. The results published will assist in the optimization of the...
A time sequence of square waves is summed to provide minimum distortion high power voltage sinusoids. The phase difference is varied to control the resultant summed amplitude. Frequency and phase modulation is achieved through digital control of the individual square waves.
A new, ac to high voltage dc converter system for radar transmitters is described. The system utilizes a gated resonant SCR inverter and full wave voltage multiplier to develop 45 kV at 30 kW average power with excellent dynamic regulation performance. Design considerations are discussed and measured performance data presented.
Financed by the National Centre for Research and Development under grant No. SP/I/1/77065/10 by the strategic scientific research and experimental development program:
SYNAT - “Interdisciplinary System for Interactive Scientific and Scientific-Technical Information”.