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The parallel connection of power electronic converters has had an increasing demand due the need of higher power. A desired feature in these connections is equal and stable current sharing among the converters. However this is not possible in real systems where factors as aging or heating cause mismatch in the parameters. This paper presents a passivity-based controller design which achieves equal...
Serious and challengeable role in markets of low power supplies for cellular phones and other small portable devices is expected for single fuel cell in future. Single fuel cell voltage level is extremely low in comparison with its output current. According to the extremely low level of the voltage, a suitable dc/dc boost converter must be used for increasing the voltage. In this paper, a model for...
In a previous paper the authors proved that a large class of switched power converters can be globally asymptotically stabilized with a simple linear proportional-integral (PI) controller around a suitably defined output. An explicit formula to construct the desired output, which is a linear combination of the converter states, is also given. Moreover, if the load resistance is unknown, an adaptation...
This paper demonstrates how load regulation can be improved in a current controlled tri-state boost converter along with the elimination of the right-half-plane (RHP) zero. Although use of a PI controller improves regulation, it degrades the dynamic performance, and a higher integral gain results in a considerably reduced phase margin. The objective of this paper is to investigate an alternative method...
This study investigates the instability phenomena of an active power factor corrector (PFC) circuit based on a buck-boost converter. First, the circuit is analyzed, and the state space mathematical model of the converter is derived. Second, Matlab/Simulink and IsSpice are used to construct and simulate the voltage-mode control model of the buck-boost power factor corrector. The intermediate-scale...
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