Title :
A simple and accurate method of computing average and RMS currents in a three-phase PWM inverter
Author :
Thurston, Robert C. ; Legowski, Stanislaw F.
Author_Institution :
Dept. of Electr. Eng., Wyoming Univ., Laramie, WY, USA
Abstract :
The design of three-phase pulse-width-modulated (PWM) inverters requires values for the average and RMS currents in the inverter in order to select the right components. A computer-aided investigation of approximate inverter current waveforms indicates that the average and RMS inverter currents are simple functions of a single factor equal to the product of the power factor and the modulation index. These functions have been expressed as per-unit equations that are useful not only for designing new inverters, but also for evaluating existing designs
Keywords :
invertors; pulse width modulation; RMS currents; average currents; current waveforms; three-phase PWM inverter; Bridge circuits; Frequency; Insulated gate bipolar transistors; Leg; MOSFETs; Power semiconductor switches; Pulse width modulation; Pulse width modulation inverters; Variable speed drives; Voltage;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 1992. APEC '92. Conference Proceedings 1992., Seventh Annual
Conference_Location :
Boston, MA
Print_ISBN :
0-7803-0485-3
DOI :
10.1109/APEC.1992.228355
