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The Boost converter with digital current-mode control and leading edge modulation is modeled in z-domain first in this paper. The influences of time delay and zero-order holder (ZOH) on digital controlled converters are taken into consideration. Then, the corresponding circuit model is established and simulations are performed to show the effectiveness of the z-model. It's shown by simulations based...
An approach to the modeling and regulation problem of a buck converter which relies on its hybrid nature is presented. The buck converter is modeled as a switched affine system. Then, using the stored energy in the inductor and the capacitor as the common Lyapunov function, switching rules and activation region of all the subsystems are defined to assess quadratic stability of the converter. Simulation...
H-bridge converter, an important topology which is widely used in power electronics, has complex nonlinear phenomena. It has important theoretical and practical significance to explore the mechanism of nonlinear behaviors in H-bridge converter. Bifurcation and chaos phenomena in H-bridge DC chopper under peak-current programmed are studied in this paper. First, iterative map of H-bridge DC chopper...
A novel phase-shift zero-voltage-switching PWM three-level DC/DC converter is proposed which introduces two output saturable inductors and an extra freewheeling diode. Thus it can achieve ZVS in wide output power range, reduce secondary duty cycle loss, clamp the parasitic oscillation and voltage spike of the output diode. The 48 V/5 A prototype experimental results verify the DC/DC converter has...
A dynamic neuro-fuzzy (DNF) adaptive control system is presented in this paper for the trajectory tracking of a flexible-link manipulator with poorly known dynamics, where the robot tip vibration is measured by position sensitive detectors (PSDs). Based on the singular perturbation method and two time-scale decompositions, the robot dynamics is approximated by a slow subsystem of an equivalent rigid...
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