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Closed-loop performance comparisons of switching regulators with current-injected control

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2 Author(s)
Schoneman, G.K. ; Rockwell Int., Cedar Rapids, IA, USA ; Mitchell, D.M.

The authors verify the validity of applying state-space averaging and linearization to the control law of current-injected switching regulators for designs with wideband first-order open-loop responses without right-hand plane (RHP) zeros. Quantitative closed-loop performance comparisons are made of current-injected versus voltage control for the boost and buck switching regulator topologies. In buck-topology regulators, current-injected control implemented using pole cancellation, does not yield categorically better closed-loop performance than what is obtained by using lead compensated voltage control. For the boost regulator, the advantages of current-injected control are greater since lead-compensation cannot usually be used due to the duty-factor-dependent complex pole and RHP zero

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Power Electronics, IEEE Transactions on  (Volume:3 ,  Issue: 1 )