抄録
A three-phase voltage-fed converter operated by a two-phase PWM scheme offers relatively high ac voltage, low switching times, and low switching losses in comparison to that operated by a three-phase PWM scheme. However, the harmonics involved in the ac-side voltages and currents produced in the two-phase PWM scheme are distributed over a wide frequency range, which can be a significant drawback depending on its applications. To overcome this problem, the authors propose a novel two-phase PWM scheme in which the harmonics appear in a frequency range as narrow as that in a conventional three-phase PWM scheme.
