Several realizations of Chua’s circuit have been proposed in the literature. The methodologies used in these realizations can be divided into two basic categories. In the first approach, a variety of circuit topologies have been considered for realizing the nonlinear resistor, NR in Chua’s circuit. The main idea in the second approach related to the implementation of the circuit is an inductorl...

The problem of an influence cooling conditions power semiconductor devices on properties selected DC–DC converters is considered. new version electrothermal average model a diode-transistor switch for SPICE (Simulation Program with Integrated Circuit Emphasis) used in the investigations. This makes it possible to take into account thermal inertia as well mutual interactions between these device...

This paper represents two model of photovoltaic, the first uses the Matlab, it explains the Photovoltaic Cell I-V Characterization and how we can get the Maximum peak power tracking(MPPT), the other is done in Orcad(new version of Pspice), in Orcad we propose an electronic circuit to be realize easily, a newer technique will be discussed in the last one, it is a new geometric approach, it depen...

Recently, a photovoltaic (PV) emulator is proposed which based on combination of constant current source and one-diode model. Its superior dynamic performance compatible with that real PV system. Although it power efficient at the maximum point (MPP), suffers from high loss around open-circuit voltage (OCV) operation condition. The can be used for system analysis testing, such as tracking (MPPT...

In order to reduce the energy losses caused by shadow lines, three options are investigated. These are: 1. the use of two types of diodes; 2. the use of an ”ideal” diode based an active bypass by using MOS-FET’s [4] and 3. parallel switching of a number of cells between two shadow lines. The first method can reduce the voltage losses of the diode to about 300mV when oversized Schottky diodes ar...

This work proposes an automated reconfiguration system to manage two types of faults in any position inside the solar arrays. The studied are short-circuit ground and open wires string. These were selected because they severely affect power production. By identifying affected panels isolating faulty one, it is possible recover part loss. Among other that can detect locate are: diode short-circu...

A novel compact rectifier for dual-band operation in the RF energy harvesting is presented. The circuit comprises a 4th order dual-band impedance matching and a single-series circuit with one double diode, both are integrating into a compact shape to occupy a small area of 30 × 35 mm. The merit of the proposed rectifier circuit is that it can be extended to n number of the frequency band by usi...