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Digital Control of High-Frequency Switched-Mode Power Converters von Corradini, Luca (eBook)

  • Erscheinungsdatum: 10.07.2015
  • Verlag: Wiley-IEEE Computer Society Pr
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Digital Control of High-Frequency Switched-Mode Power Converters

This book is focused on the fundamental aspects of analysis, modeling and design of digital control loops around high-frequency switched-mode power converters in a systematic and rigorous manner

Comprehensive treatment of digital control theory for power converters
Verilog and VHDL sample codes are provided
Enables readers to successfully analyze, model, design, and implement voltage, current, or multi-loop digital feedback loops around switched-mode power converters
Practical examples are used throughout the book to illustrate applications of the techniques developed
Matlab examples are also provided

Luca Corradini, PhD, is an Assistant Professor at the University of Padova, Italy. He is the co-author of more than fifty articles published in journals and conference proceedings.

Dragan Maksimovic, PhD is a Charles V. Schelke Endowed Professor and Director of the Colorado Power Electronics Center (CoPEC) at the University of Colorado at Boulder, USA.

Paolo Mattavelli, PhD, joined the DTG of the University of Padova, Italy. Dr. Mattavelli's major fields of interest include analysis, and modeling and control of power converters.

Regan Zane, PhD, is a Professor of Electrical and Computer Engineering at the University of Colorado at Boulder, USA. Dr. Zane received the NSF Career Award in 2004 for his work in energy efficient lighting systems.

Produktinformationen

    Format: ePUB
    Kopierschutz: AdobeDRM
    Seitenzahl: 360
    Erscheinungsdatum: 10.07.2015
    Sprache: Englisch
    ISBN: 9781119025375
    Verlag: Wiley-IEEE Computer Society Pr
    Größe: 31061 kBytes
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Digital Control of High-Frequency Switched-Mode Power Converters

Introduction

Efficient processing and control of electric power is required in applications ranging from submilliwatt on-chip power management to hundreds of kilowatt and megawatt power levels in motor drives and utility applications. The objectives of high efficiency, as well as static and dynamic control of inputs or outputs under a range of operating conditions, are accomplished using power electronics, that is, switched-mode power converters consisting of passive (capacitive and inductive) components, and power semiconductor devices operated as switches. In high-power applications, control and monitoring tasks are often more complex, while the power semiconductor devices are operated at relatively low switching frequencies, for example, up to tens of kilohertz. The controller cost and power consumption are relatively low compared to the overall system cost and power rating. In these applications, digital control offers clear technical and economic advantages in addressing complex control, management, and monitoring tasks. As a result, for many years now, digital control methods and digital controllers based on general-purpose or dedicated microprocessors, digital signal processors (DSPs), or programmable logic devices have been widely adopted in power electronics applications at relatively high power levels.

In ubiquitous low-to-medium power switched-mode power supply (SMPS) applications, including point-of-load (POL) regulators, nonisolated and isolated dc-dc converters, single-phase power factor correction (PFC) rectifiers, single-phase inverters, and lighting applications, adoption of digital power management and digital control has been slower. In these applications, switching frequencies are often in the range from hundreds of kilohertz to multiple megahertz, and much faster dynamic responses are required. The controller cost and the controller power consumption can easily present significant portions of the system cost and power dissipation. Furthermore, in many applications, control challenges have been successfully met by continuous advances of readily available analog controllers, using well-established analog analysis, modeling, and design techniques [1-5]. Nevertheless, practical digital control of high-frequency switched-mode power converters has moved from proof-of-concept demonstrations to digital pulse width modulation (DPWM) controller chips commercially available from multiple vendors, with growing adoption rates in many applications. Several factors have contributed to the increasing penetration of the concept of "digital power" in high-frequency power electronics applications:

Ongoing advances in digital integrated-circuit processes have continued to increase processing capabilities while bringing the cost down.
The needs for improved system integration and increasingly complex power management and monitoring functions have translated into the needs for digital interfaces and programmability in switched-mode power conversion applications [9-11].
Practical high-performance digital control techniques have been introduced and demonstrated, together with innovative approaches offering performance gains or entirely new capabilities that would be difficult or impractical to realize using traditional analog techniques [12-14].
The "digital power" concept encompasses several aspects:

Digital power management , which refers to system-level control and monitoring of power conversion and distribution, usually over a serial communication bus [9-11]. Power management functions include turning on and off or sequencing system power rails, adjusting setpoints for converter control loops, programming control loop parameters, monitoring and reporting of measured status or variables, and so on [15, 16]. These functions are typically performed at timescales that are relatively long compared to a switching period.
Digital

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