Fast modelling techniques for microprocessor-based optimal pulse-width-modulated control of current-fed inverter drives

Novel On-Line Microprocessor Generation of Harmonic Elimination and Minimisation PWM Control Strategies using Regular-Sampling Techniques

“…Fast modelling techniques to cater for these more complex closed-loop optimal PWM stmtegies have previously been developed [22] for the CSI induction motor drive. These fast modelling techniques have been used as a basis for developing very simple closed-form analytic expressions for ~w,(t) and ~PE (t), which when included into the minimisation procedure provide extremely efficient optimal PWM solutions [22).…”

“…These fast modelling techniques have been used as a basis for developing very simple closed-form analytic expressions for ~w,(t) and ~PE (t), which when included into the minimisation procedure provide extremely efficient optimal PWM solutions [22). Experimental and CAD results demonstrating the application of these optimal ,,,.-( PWM strategies have been presented in some detail previously for the conventional CSI drive [22,23] (120° conduction), the series connected CSI (SCCSI) drive [24] (180° conduction) consisting of three single-phase bridges in series, and the duplex CSl drive [19,21] consisting of two 120° CSI's in parallel.…”

“…The performance criteria used for designing these optimal PWM strategies are based on rotor speed ripple Aw,(t) and rotor positional error tl.pE(t), which can be expressed in terms of the total harmonic pulsating component of torque Tp(T) [22].…”