AN ADVANCED PROGRAMMED PWM MODULATOR FOR INVERTERS WHICH SIMULTANEOUSLY ELIMINATES HARMONICS AND REJECTS DC LINK VOLTAGE RIPPLE Academic Article uri icon

abstract

  • A technique for generating programmed pulse width modulated (PWM) waveforms which simultaneously eliminates harmonics and rejects DC-link ripple is proposed. The technique guarantees high-quality inverter output voltage by rejecting the lower-order harmonics generated by the DC-link voltage ripple. In order to achieve this objective, the modulating function in the programmed PWM technique is suitably altered by a feedforward approach. The modulator is useful in situations where voltage ripple in the DC-link is unavoidable, such as when feeding nonlinear loads or when the front-end rectifier supplying the DC-link is fed from a weak AC system which is frequently unbalanced. A design procedure and the digital implementation of the modulator are discussed in detail.

published proceedings

  • APEC 90

author list (cited authors)

  • ENJETI, P., & SHIREEN, W.

complete list of authors

  • ENJETI, P||SHIREEN, W

publication date

  • December 1990