Adrian Taut

Analysis and simulation of power inverter with load variation for induction heating applications

All induction heating applied systems are developed using electromagnetic induction. Electromagnetic induction refers to the phenomenon by which electric current is generated in a closed circuit by the fluctuation of current in another circuit placed next to it. The basic principle of induction heating is that AC current flowing through a primarily circuit induces a current in the load (the secondary circuit) located near it and heating the load. The intent of this presentation is to present the details of half-bridge power inverter via a comprehensive analysis with operation equations of the circuit and their solving using specific sotware. An alternative to the use of circuit-oriented simulators for study of these circuits operating is to describe the circuit and the controller by means of differential and algebraic equations. We must develop the equations for all possible states in which the circuit may operate. These algebraic/differential equations can be solved by using of software packages specifically designed for this purpose that provide a choice of integration routines, graphical output, and so on.

Embedded system for remote monitoring of OBD bus

This paper aim is to present the implementation the monitoring system based on OBD reader, in order to read and compare the OBD CAN bus informations. The goal is to read the values of speed and other useful information during the cruise. This can be also helpful to improve the informations used in other applications. The goal of our work is to correlate these informations with the energy recovery and in future thus can leads to a considerable decrease of the energy consumption of cars. At the same time, is protecting the life expectancy of the electronics system of an automobile electric motor.

A Matlab tool for simulations of power resonant converters

The intend of this paper is to present a new tool for simulations of power resonant converters. The load of converters represents an oscillating resonant circuits and the major problem consist in obtaining the maximum power at resonant switching frequency, imposed by load. In order to simulate and implementing the resonant converters, we develop a Matlab tool based of the differential equations that define the converter topology. This tool returns the corresponding waveforms for converter operation and allows changing in every moment the circuit parameters.

Analysis and simulation of a half-bridge inverter

The intent of this presentation is to present the details of half-bridge power inverter via a comprehensive analysis with operation equations of the circuit and their solving using specific sotware. An alternative to the use of circuit-oriented simulators for study of these circuits operating is to describe the circuit and the controller by means of differential and algebraic equations. We must develop the equations for all possible states in which the circuit may operate. These algebraic/differential equations can be solved by using of software packages specifically designed for this purpose that provide a choice of integration routines, graphical output, and so on..

System for energy recovering with BLDC motor at deceleration momentum

This paper aim is to present the implementation of an energy recovery system based on DC motor deceleration momentum, in order to be used in propulsion systems. The energy which should be lost during deceleration is now recovered, stored and then used in other applications. The energy recovery and reutilization leads to a considerable decrease in total energy consumption necessary for such a system. At the same time, the super capacitors usage (in order to recover energy during the inertia momentum) is protecting the life expectancy of the battery, which normally supplies the propulsion system of an automobile electric motor.

Simulation and design of a Class E power amplifier

Class E switching-mode tuned power amplifier offers high efficiency at high frequencies. Class E power amplifier concept, introduced by Sokal, is not defined by a special topology. The most simple topology for class E power amplifier consists in a single switch device that operate at carrier frequency of the output signal and a load network that must extract only a single spectral frequency component. The load network consists in a capacitor shunting the switch device and a series-tuned output circuit. To derive the basic equations for class E amplifier we use Fourier series techniques. These equations are implemented in Matlab with a friendly interface. This implementation and this interface can be a very useful tool for students that are interested in class E operation and also a good tool for class E circuit design. In this paper you can find a description of class E power amplifier with functional equations.

On the impact of indirect WAN routing on geo-replicated storage

Micro-clouds infrastructures allow supporting applications on local and energy-efficient resources. Communication between micro-clouds takes place on shared and non-dedicated Internet links. Network control and optimization can only happen at the edge. For availability and persistence, the storage of application data must be geo-replicated. Maintaining strong data consistency under concurrent accesses requires delay-sensitive coherence protocols, linking the performance of the storage to that of the network between micro-clouds. We evaluate if the use of network control at the edge of a European-wide multi-site testbed, together with appropriate network monitoring, can allow improving the performance of ZooKeeper, a strongly-consistent replicated store. Our approach leverages the indirect routing of coherence protocol traffic in the presence of network triangle equality violations. We analyze the impact on storage of variations in WAN performance, and show how the use of traffic redirection can help reducing it.

Mathematical analysis to control power transfer in resonant power converters

This paper aims to present a mathematical analysis method for resonant power converter, in order to control the transfer of power which is transmitted to the load. Starting from the idea that most switching power converters are using the pulse width modulation (PWM) technique to control the switching elements, the paper presents an analysis of the control method that can be applied on such converters and a mathematical analysis of the resonant load that can be found at the output of the circuit. On the other hand, the paper proposes an interactive interface to design and simulate a resonant power converter. The tool can be used by experienced engineers in power converters domain, to properly configure such a circuit, but also by those who are starting to learn and understand how these circuits are working. The tool allows seeing, not just the final values for the components that make the circuit, but also the waveforms form the main components. By doing so, the converters area of operation can be observed, allowing to adjust the design in order to improve the design.

Why the mounting inductance is important in designing a Power Distribution Network

Minimizing the noise in a Power Distribution Network (PDN) is a critical step in Power Integrity (PI) design. The main effort is to keep the PDN impedance under a certain value in a frequency range by using decoupling capacitors, which can be at Printed Circuit Board (PCB) level, in package or in chip. Although you can get the same performance with any type of capacitor for high frequencies, it is important to consider the efficiency of decoupling capacitors in small ceramic casings at the expense of the large enclosures. Each PCB designer faces certain restrictions, including those related to the gauge plate, number of components, signal traces that need to be routed, so he will be able to achieve its goal increasing the effect of certain factors, [16][20][21][22]. The proximity of the capacitor to the chip and to its vias, and also its parasitic (equivalent series inductance and equivalent series resistance) determine the speed at which the capacitor reacts to the change in current. This paper reviews possible solution to minimize the noise in a PDN by answering the question “Why the mounting inductance needs to be minimize in order to have a proper Power Distribution Network (PDN) impedance?”. To answer of this question, will be used a SPICE equivalent circuit of the PDN. This allows both frequency and transient response to be done with SPICE simulation.

Analysis and simulation of LCLR converters

In the last decades, induction heating systems have gained ground not only in fields such as industrial applications for heating, training or melting metal, but also in home appliances, such as those for cooking. The following work proposes to design a system, which will be able to heat metal using induction heating. The power transfer process will be optimized by limiting or even eliminating switching losses using techniques such as zero current/voltage switching and by designing a class D series-parallel LCLR resonant circuit, which operates at the resonant frequency. The intent of this presentation is to present the details of a LCLR converter, that ca be used in induction heating applications. The paper will present a simulation and a design method for such type of converters, with an extended analysis of the output stage that can be assimilated like a LCLR circuit.