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About this book

Omar Abu Mohareb proposes a novel dynamic inductor control (DIC) that can be generally applied to various DC‑DC converter types. The aim is to improve the converter efficiency throughout controlling the inductance value at all operating points without consequential complexity or increase in the inductor cost and size. The dynamic inductor control implies the maximum energy transfer (MET) concept to improve the DC‑DC converter efficiency and preserve a fast system dynamics against load changes at the same time.

About the Author:

Omar Abu Mohareb has earned his doctoral degree in Automotive Mechatronics Engineering from University of Stuttgart. He is now active in electromobility field and its efficient and smart infrastructure concepts. He has also earned his first patent on the proposed dynamic inductor control (DIC) concept.

Table of Contents


Chapter 1. Introduction

The wide spread of battery-powered new technologies such as smart phones, tablets computers and electric vehicles (EV) are forcing the development of more efficient and powerful battery chargers. The key technology to satisfy these requirements are the switched-mode DC-DC converters, which are used to “pump” the charging current into the battery.
Omar Abu Mohareb

Chapter 2. Literature Review and State of the Art

DC-DC converters are commonly used in power-conserving applications, like battery-operated equipment to regulate to a lower voltage, boost an input voltage or invert it to create a negative voltage. Efficiency is an important DC-DC converter characteristic as it may achieve efficiencies greater than 95% under optimum conditions. However, this efficiency is limited by dissipative losses in the components.
Omar Abu Mohareb

Chapter 3. Boost Battery Charger Modeling

Switched-mode power supply (SMPS) or switched-mode DC-DC converter is the basic element for the majority of electronic equipment and domestic appliances. The light weight, high efficiency and low cost of SMPS’s compared to linear power supplies make them favorable choice for stationary and mobile applications. The advantages of SMPS are marred by the non-linearity and dynamics of the system due to its sequential switching nature. So, a representative mathematical description for the SMPS boost converter; which provides a deep understanding of the operation of the switching converter and an easy-to-use accurate model, should be obtained.
Omar Abu Mohareb

Chapter 4. Dynamic Inductor Control Concept

This chapter is conducted to demonstrate the deployment of the dynamic inductor control in the DC-DC converters to achieve the maximum efficiency under different operating conditions. The dynamic inductor control sets the inductor at its maximum inductance value by controlling magnetic field intensity H using a DC control current to keep the inductor working away from its saturation point and forcing it to operate at the maximum possible permeability point μmax (maximum inductance value).
Omar Abu Mohareb

Chapter 5. Dynamic Inductor Control Simulation

In this chapter, the dynamic inductor control strategy is numerically evaluated to validate its efficiency and stability. MATLAB Simulink model was implemented for the numerical evaluation in section 5.1. The MET concept from section 3.3 is also evaluated in order to illustrate the possible tradeoffs between the systems dynamics and efficiency.
Omar Abu Mohareb

Chapter 6. Dynamic Inductor Control Implementation

The dynamic inductor control strategy is implemented with a prototype DC-DC converter to evaluate and validate its effectiveness and stability. The prototype layout is described in section 6.1. The controller implementation on a printed circuit board is detailed in section 6.2.
Omar Abu Mohareb

Chapter 7. Experimental Results

This chapter presents the experimental results for the dynamic inductor control implemented in the prototype DC-DC converter to experimentally validate the proposed control strategy. The steady-state and the transient performance of the converter with DIC are demonstrated throughout different load and input transient tests in the following sections.
Omar Abu Mohareb

Chapter 8. Conclusions and Future Work

Switched-mode DC-DC converters are the essential part of much electronic equipment for their high efficiency and simplicity. Conventional DC-DC converters suffer from efficiency degradation due to continuous change in the inductance value during operation. This dissertation has proposed a novel dynamic inductor control that can be generally applied to various DC-DC converter types to improve the converter efficiency throughout controlling the inductance value at all operating points without consequential complexity and increase in the inductor cost and size.
Omar Abu Mohareb


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