![]() ![]() Even for studies conducted on boost converter, the inductor loss is calculated in number of turn associated to core loss with magnetic effects but not directly versus inductor parasitic resistance. Unfortunately, these studies were not carried out on the basic boost converter but on some, more sophisticated structure. A third category used mixed loss model that are able to synthetically and analytically calculate and analyze the component losses and system losses as functions of voltages, power, switching frequency, operating temperature of the heatsink on the semiconductors and so on. Some others took into account switching loss and core loss. Some of them use only conduction loss, missing the switching loss and core loss, which take a large part in the high frequency system losses. Many works have been carried out dealing with loss models or loss calculation platforms in order to analyze and optimize the power converters before using them into real operation. These disadvantages are the major limitation of the use of that type of converter. It is also well know that its performance is limited due to higher on state resistance leading to more conduction losses in the switch, losses in the inductor series resistance and the ESR of the output capacitor. The conventional boost converter has many disadvantages like high voltage stress across the switching device and reverse recovery problem of output diode. Many high step-up DC-DC converters have been designed with advantages and disadvantages but all of them derive from the conventional boost converter. The second stage is a DC to AC inverter to meet the load demand. Such a microinverter has generally two stages the first stage uses the high step-up DC-DC converter to meet the voltage demand of the second stage and also act as a maximum power point tracker in order to get maximum power from the PV module. This is particularly true in the case where a microinverter - is provided to each PV module of solar PV systems. So, due to this low voltage generation associated to generally high input current requirement, a high step-up DC-DC converter with high efficiency is needed to convert the low DC input to the required voltage, current, and frequency. However, renewable energy sources have low output voltage characteristics. The most promising renewable energy sources are wind energy, photovoltaic (PV) cells, and fuel cells (FC). These alternative energy technologies are essentially the renewable ones. Actually, the demand for clean energy sources is actively growing leading to the development of new or alternative energy technologies. ![]()
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