Encontrados 13 documentos, a visualizar página 1 de 2

Wind energy extraction and conversion : optimization through variable speed gen...

The maximization of wind energy extraction can be obtained using variable speed electrical generators in conjunction with non linear control algorithms. This paper presents an incremental speed control method which is independent from both wind speed measurement and specific systems characteristics. The algorithm is based on the dynamic behaviour of the electrical generator and uses fuzzy logic as a non linear ...

A FEM punch-through IGBT model using an efficient parameter extraction method

Modeling Buffer Layer IGBTs with an Efficient Parameter Extraction Method

This paper presents a Finite Element, physics-based, punch-through, IGBT model, its SPICE implementation and a parameter extraction procedure. Developed model is based on solving Ambipolar Diffusion Equation (ADE) trough a variational formulation, resulting in a system of ODEs, from which charge carrier distribution is obtained. SPICE Model Implementation uses an electrical analogy for the resulting system of...

Assessment of PROFIBUS networks using a fault injection framework

A variational ADE (ambipolar diffusion equation) formulation and its finite ele...

This paper presents a variational formulation of the Ambipolar Diffusion Equation (ADE) and a finite element (FE) method approach to its solution. The method allows solutions for ADE through equivalent electrical networks. So it will be simple to teach the dynamics associated with low doped zones, presented in any bipolar semiconductor, such as power diodes, thyristors, bjts and igbts, as well as, its static an...

A simple and efficient parameter extraction procedure for physics based IGBT mo...

Extraction of parameters for models of power semiconductors is a need for researchers working with development of power circuits. One of the drawbacks of physics based models is how to extract the numerous parameters to describe the model. Different approaches have been taken, most of them cumbersome to be solved. This paper presents a simple and accurate method of parameter extraction for physics based IGBT mo...

Optimization of energy generation in wind farm through fuzzy control

Wind farms are energy generation systems being autonomous and controllable generating units. At current technological status, each set turbine-generator-power converter should be considered as a unit. These units work as an individual system for variable speed systems. Variable speed wind systems demand for an appropriate control of operating point at different wind regimens as well they can operate at differen...

A new physics based SPICE sub-circuit model for insulated gate bipolar transist...

The paper describes SPICE simulator implementation of a new, physics based, Finite Element Method (FEM) model for semiconductor simulation. The method is based on unidimensional approach that associates each zone of the semiconductor to a sub-circuit capable of implementation, in any general circuit simulator (such as SPICE), in a modular mode. After identification of these zones they are just modelled using ...

A new physics based SPICE model for NPT IGBT

A physics based, Non-Punch-Through, Insulated Gate Bipolar Transistor (NPT-IGBT) model is presented, as well as its porting into available circuit simulator SPICE. The developed model results in a system of ODEs, from which time/space hole/electron distribution is obtained, and is based on solution of ambipolar diffusion equation (ADE) trough a variational formulation, with posterior implementation using one-di...

Direct current control of an active power filter for harmonic elimination, powe...

An active power filter is designed, simulated, implemented, and tested. It can work in different modes: active power filtering, power factor correction, and load unbalance compensation. It is based on a current controlled voltage-source inverter with fixed carrier PWM. The control algorithm generates the source reference currents based on the controlled DC link voltage. The dimensioning criteria of the inductiv...