PWM transducer output wave form and restrain technology's emulation study
Bai Li · 2003
The mathematic model which is the PWM frequency converter's output wave is installed, and come to m order simultaneous equation about the n odd harmonic's amplitude and a quarter of time cycle trigger times(m). The simultaneous equation is solved by the numerical method,and the series angles of trigger can be eliminated m lowtohigh odd harmonics figured out by a computer. At the same time make a simulation research for the result,and come to the wave of the line voltage, the phase voltage and the phase current exported the frequency converter, the frequency converter is controlled by the phase exported the frequency converter, the frequency converter is controlled by the program of trigger control provided in the text. The result of simulation manifests the resulting current wave borders on the sine wave. It is proved this is a efficient restraint technology of the harmonic wave.6figs.,1tab.,7refs.