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Based on the theory of fractional order differential equation, a fractional order control law for Sliding Mode Control (SMC) is proposed in this paper. And a sliding mode controller is designed to synchronize the chaos motions between a slave Duffing system and a master Duffing system including a fractional integral item. Finally, Chaos synchronization in the two systems is investigated and the numerical...
A DC/DC switching converter is a strongly nonlinear control system. The study on chaotic phenomena and chaos control is a hotspot of the power electronics. In this paper the dynamical model of current-mode controlled boost converter has been studied. Based on expansion of ramp compensation method and parametric resonance perturbation method, we used three different perturbation signals (i.e. sine...
Intermittent phenomena are commonly observed in periodically driven switching power converters. This paper explores the intermittent chaos and subharmonics in a current-mode controlled SEPIC converter using a circuit model with intruding interference. The theoretical analysis and computer simulation are prensted, which indicate that the signal strength and frequency of the intruding interference are...
This paper studies the operating principle of phase-shifting (PS) full-bridge (FB) zero-voltage-switched (ZVS) converter and analyses particularly its topology, based on which it is found that PS FB ZVS converter is exactly equivalent to a buck converter topologically. Therefore, the complex phenomena such as bifurcation and chaos that are found frequently in buck converters can also arise in PS FB...
Intermittency are commonly observed by practicing power supply engineers in their design workbenches. It shows to be a symmetrical period-doubling bifurcation in time domain with fixed long intermittent period. Sometimes it is called "breathing". Such kind of operation mode is usually undesired and can be avoided by means of screen technique or modifying the circuit parameters. This paper...
Modulating reference current with a compensating ramp is a traditional method to stabilize the operation of the peak current-mode controlled DC/DC boost converter. In this paper, this method is applied to a PFC boost converter for gaining the stable operation target. Time-domain waveforms obtained by computer simulations are provided to illustrate the control results. Analytical investigations confirm...
Intermittency are commonly observed by practicing power supply engineers in their design workbenches. It shows to be a symmetrical period-doubling bifurcation in time domain with fixed long intermittent period. Sometimes it is called "breathing". Such kind of operation mode is usually undesired and can be avoided by means of screen technique or modifying the circuit parameters. This paper...
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