| Abstract |
This paper presents a novel method of direct synchronised pulsewidth modulation (PWM) for three-phase voltage source inverters, feeding induction motors with different control regimes. It is based on the universal algorithm with either simplified algebraic or accurate trigonometric control functions, with vector approach for determination of the pulse patterns. Different control modes of the drive systems with synchronised PWM, including standard scalar V/F control, and also V²/F = constant and V/F² = constant control regimes, have been analysed in the paper. Simulations give the behavior of the PWM techniques proposed. Both continuous and discontinuous schemes of synchronised PWM, applied for the corresponding control regime, have been analysed and compared. |
