Maximal voltage three-phase PWM without third harmonic injection

Details Maximal voltage three-phase PWM without third harmonic injection Maximal voltage three-phase PWM without third harmonic injection

1995-11-07

1997-04-22

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

327 71, 327355, H03D 100

Patent

active

056232195

ABSTRACT:
An inverter control circuit includes means for continuously computing and subtracting an average voltage from each of three modulating input waveforms. The average voltage is computed by determining the instantaneous maximum and minimum voltages of the three waveforms, summing these voltages, and then dividing them by an averaging factor. The shifted modulating waveforms are then compared with a high-frequency carrier wave to modulate the duty cycles of the inverter outputs to approximate desired output waveform characteristics.

REFERENCES:
patent: 4341961 (1982-07-01), Komoriya

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