جستجوی مقالات مرتبط با کلیدواژه « مبدل باک بوست » در نشریات گروه « برق »

With the increasing reduction of fossil fuels and the increase in pollution caused by fossil fuels, the use of renewable energy has become very important in societies. One of these renewable energies is solar energy. The disadvantage of solar cells is their low power output. To solve this problem, the cells are connected in series and in parallel to increase the level of production power by a solar panel, but despite the maximum power in these mobile production units has been considered by researchers. To solve this problem, and in many articles, maximum tracking methods have been proposed. In this paper, a combined method including fuzzy observation, follow-up, and fuzzy logic has been proposed to increase the production capacity of solar panels. In order to show the performance of the proposed method, the results were compared with the other two methods, which indicated that the performance of the proposed method was satisfactory.

In this paper, the behavior of a hybrid back-boost converter with a positive output voltage is simulated. This converter consists of an amplifier voltage converter called KY converter and a modified synchronous converter (SR). The converter operates in continuous conduction mode (CCM) and has a non-shock output current, reducing the current stress in the output capacitor and reducing the output voltage ripple. Finally, in addition to describing the operation of the circuit, the correctness of the converter operation is simulated using PSP software.

This paper presents a new model for a DC-DC buck-boost converter considering its all controlled and uncontrolled switching phenomena in both continuous and discontinuous conduction modes. The proposed model is developed based on hybrid systems theory using mixed-logical dynamical (MLD) systems, and an improved version of these systems called as extended mixed-logical dynamical (EMLD) Systems. Compared to the existing MLD and EMLD models of the DC-DC converters, the proposed model contains fewer numbers of integer variables and inequalities, and, as a result, leads to the less complexity and solution time of the mixed integer optimization problems arising from the corresponding hybrid model predictive controllers. The advantage of the proposed modeling and control method is evaluated via the comparison of the existing MLD models and hybrid predictive controllers as well as classic proportional-integral (PI) controllers. Moreover, the theoretical challenges for the closed-loop stability proof are discussed and in this regard some future research outlines and ideas are introduced. The steady state and transient performance of the closed-loop control system over a wide range of the operation points show the satisfactory operation of the proposed modeling and control scheme for the DC-DC buck-boost converter.