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Boost Converters Modeling Essay

647 words - 3 pages

1. Introduction
Recently, the power electronics components have a large evolution due to introduce of the fast switches components and appearance of a new type of control techniques, which lead to create new static converters able to supply domestic and industrial applications such as: (lap tops, appliances, electric vehicles, motors, etc.). Moreover, the use of power converters for renewable energy (solar, wind) become more important. The DC-DC converter is a focus element of the power supplies. Indeed, it has numerous applications in diverse power levels; low power like chargers of mobile phones that need a few watts, high power like electric welding that need a few kW. The DC-DC converter includes various topologies such as; Buck, Boost, Buck- Boost, etc. [1]. Among these types, the DC-DC boost has an interesting features, which are the lifting operation, simple structure and low cost. The development of semiconductor allows the appearance of a new power converters use a ...view middle of the document...

For this reason, various intelligent controller have been introduced to get an optimal performance; regardless of parameters variations. Among these controller we found fuzzy logic [4-6], sliding mode[7-11], predictive technique[12], artificial neural network[13].

The sliding mode control or so-called system variable structure is appeared in the 50s, is has a large interest in the world[14-17]. This type of system has a structure changes during operation. Moreover, it is characterized by the select of function and switching logic. This later allows the system to switch from each surface to another at any time, due to its availability and efficiency, the sliding mode control provides a systematic method to solve the stability and modeling imprecision problems in new electronic components. Also, the predictive control has a several years of development, especially in the industrial applications that need a high
Specific performance. Due to its reliability and adaptation capacity, this technique used in new power converters. Thus, their conception is simpler and satisfy the robustness conditions.

In this study, an attempt to investigate the dynamic characteristics of the sliding mode and predictive control to achieve a unity power factor and to minimize the total harmonic distortion (THD), the sliding mode is used to regulate the output voltage and maintain it in suitable value during variation of parameters (load, output voltage) and give the IMax, this later is employed by the predictive control, which compare with the input current to decide the state of the switch (on or off).This process permits the use of converter in the best performance. After verify this method in simulation, we must show their experimental tests, to fulfil this aim, webuilt a test bench using dSPACE 1104 such as an interface between computer and electric component.

This work is organized as follow, in 2 highlights of boost converters modeling. In 3the study of the proposed methods. In 4 the simulation and experimental results are presented to evaluate the proposed control, in 5 a general conclusion presents the essential results of our work.

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