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In this paper, comparative study of three algorithms of digital PI control, that is, conventional PI control, offset control and modified PI control, is presented. Conventional PI control is subjected to numerical error because the gain must be small in order to move zero of the control to output transfer function to low frequency. To prevent this undesired issue, authors have already proposed novel...
This paper introduces a novel simulation algorithm for closed loop frequency response analysis by Fourier Transform Method (FTM). FTM is reviewed briefly and novel analysis algorithm is described. The simulator employing this novel algorithm is developed and demonstrated for a buck converter with feedback. The simulation result is in good agreement with the experimental result.
In this paper, a novel multi-stage converter with a coupled-inductor is presented in order to reduce the ripple currents in the switches and the output capacitor. The operating principle is described in detail and the steady state analysis is performed for a 12 V to 1.5 V prototype buck converter. From the experiments, it is confirmed that ripple currents in switches are greatly reduced and power...
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