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
fDate :
4/1/1993 12:00:00 AM
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 are expressed as per-unit equations that are useful not only for designing new inverters, but also for evaluating existing designs
Keywords :
invertors; power engineering computing; pulse width modulation; RMS currents; approximate inverter current waveforms; average currents; computer-aided investigation; modulation index; power factor; 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;
Journal_Title :
Power Electronics, IEEE Transactions on
