Open loop V/f control of induction motor based on hybrid PWM with reduced torque ripple

PI Controlled Active Front End Super-Lift Converter with Ripple Free DC Link for Three Phase Induction Motor Drives

“…The last stage converts the DC power from the SLC to variable voltage/variable frequency AC power using a VSI. The following subsections explain (A) the gate control strategy of the SLC using a PI controller, (B) the gate control strategy of the VSI in the proposed system, and (C) the design deliberation of the inductor L 21 and the capacitor C o of the SLC.…”

“…(14) and (17)] can be completed as 21 21 (19) where i L21 [t(n)] and i L21 [t(n + 1)] are the inductor currents at the commencing instant of the n th and (n + 1) th switching cycles, respectively.…”

“…During the switch ON (for t(n) ≤ t < t(n) + γT) of the SLC, the loop equation using Kirchhoff's voltage law (KVL) can be expressed as 21 21…”

“…The state-space averaging model of the SLC is Single-phase supply voltage is also involved in the topology to generate the reference current for the inductor L 21 .…”

“…The state model of the SLC [18], [19] is determined by assuming the state variables x 1 (current flowing through L 21 …”