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1. |
Record Nr. |
UNINA9910453103803321 |
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Autore |
Hughes Austin |
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Titolo |
Electric motors and drives [[electronic resource] ] : fundamentals, types and applications / / Austin Hughes and Bill Drury |
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Pubbl/distr/stampa |
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Amsterdam, : Elsevier, 2013 |
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ISBN |
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0-08-099368-0 |
1-299-20199-7 |
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Edizione |
[4th ed.] |
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Descrizione fisica |
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1 online resource (458 p.) |
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Altri autori (Persone) |
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Disciplina |
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Soggetti |
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Electric motors |
Electric driving |
Electronic books. |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Note generali |
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Description based upon print version of record. |
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Nota di bibliografia |
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Includes bibliographical references and index. |
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Nota di contenuto |
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Front Cover; ELECTRIC MOTORS AND DRIVES; Copyright; CONTENTS; PREFACE; Chapter 1 - Electric Motors - The Basics; 1.INTRODUCTION; 2.PRODUCING ROTATION; 3.MAGNETIC CIRCUITS; 4.TORQUE PRODUCTION; 5.TORQUE AND MOTOR VOLUME; 6.ENERGY CONVERSION - MOTIONAL E.M.F.; 7.EQUIVALENT CIRCUIT; 8.CONSTANT VOLTAGE OPERATION; 9.GENERAL PROPERTIES OF ELECTRIC MOTORS; Chapter 2 - Introduction to Power Electronic Converters for Motor Drives; 1.INTRODUCTION; 2.VOLTAGE CONTROL - D.C. OUTPUT FROM D.C. SUPPLY; 3.D.C. FROM A.C. - CONTROLLED RECTIFICATION; 4.A.C. FROM D.C. - INVERSION; 5.A.C. FROM A.C. |
6. INVERTER SWITCHING DEVICES 7.CONVERTER WAVEFORMS, ACOUSTIC NOISE, AND COOLING; Chapter 3 - Conventional D.C. Motors; 1.INTRODUCTION; 2.TORQUE PRODUCTION; 3. MOTIONAL E.M.F.; 4.D.C. MOTOR - STEADY-STATE CHARACTERISTICS; 5.TRANSIENT BEHAVIOR - CURRENT SURGES; 6.FOUR QUADRANT OPERATION AND REGENERATIVE BRAKING; 7.SHUNT AND SERIES MOTORS; 8.SELF-EXCITED D.C. MACHINE; 9.TOY MOTORS; Chapter 4 - D.C. Motor Drives; 1.INTRODUCTION; 2.THYRISTOR D.C. DRIVES - GENERAL; 3.CONTROL ARRANGEMENTS FOR D.C. DRIVES; 4.CHOPPER-FED D.C. MOTOR DRIVES; 5.D.C. SERVO DRIVES; 6.DIGITALLY CONTROLLED DRIVES |
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Chapter 5 - Induction Motors - Rotating Field, Slip and Torque 1.INTRODUCTION; 2.THE ROTATING MAGNETIC FIELD; 3.TORQUE PRODUCTION; 4.INFLUENCE OF ROTOR CURRENT ON FLUX; 5.STATOR CURRENT-SPEED CHARACTERISTICS; Chapter 6 - Induction Motors - Operation from 50/60Hz Supply; 1.INTRODUCTION; 2.METHODS OF STARTING CAGE MOTORS; 3.RUN-UP AND STABLE OPERATING REGIONS; 4.TORQUE-SPEED CURVES - INFLUENCE OF ROTOR PARAMETERS; 5.INFLUENCE OF SUPPLY VOLTAGE ON TORQUE-SPEED CURVE; 6.GENERATING; 7.BRAKING; 8.SPEED CONTROL; 9.POWER-FACTOR CONTROL AND ENERGY OPTIMIZATION; 10.SINGLE-PHASE INDUCTION MOTORS |
11.POWER RANGE Chapter 7 - Variable Frequency Operation of Induction Motors; 1.INTRODUCTION; 2. INVERTER-FED INDUCTION MOTOR DRIVES; 3.TORQUE-SPEED CHARACTERISTICS; 4.INTRODUCTION TO FIELD-ORIENTED CONTROL; 5.STEADY-STATE TORQUE UNDER CURRENT-FED CONDITIONS; 6.TORQUE VS SLIP FREQUENCY - CONSTANT ROTOR FLUX LINKAGE; 7.DYNAMIC TORQUE CONTROL; 8.IMPLEMENTATION OF FIELD-ORIENTED CONTROL; 9.DIRECT TORQUE CONTROL; Chapter 8 - Inverter-fed Induction Motor Drives; 1.INTRODUCTION; 2.PULSE-WIDTH MODULATED (PWM) VOLTAGE SOURCE INVERTER (VSI); 3.PERFORMANCE OF INVERTER-FED INDUCTION MOTOR DRIVES |
4.EFFECT OF INVERTER WAVEFORM AND VARIABLE SPEED ON THE INDUCTION MOTOR 5. EFFECT OF THE INVERTER-FED INDUCTION MOTOR ON THE UTILITY SUPPLY; 6. INVERTER AND MOTOR PROTECTION; 7.ALTERNATIVE CONVERTER TOPOLOGIES; Chapter 9 - Synchronous and Brushless Permanent Magnet Machines and Drives; 1.INTRODUCTION; 2.SYNCHRONOUS MOTORS; 3.EQUIVALENT CIRCUITS OF SYNCHRONOUS MOTORS; 4.OPERATION FROM CONSTANT-VOLTAGE, CONSTANT-FREQUENCY (UTILITY) SUPPLY; 5.VARIABLE-FREQUENCY OPERATION; 6. SYNCHRONOUS MOTOR DRIVES; 7. PERFORMANCE OF BRUSHLESS MOTORS; 8.RELUCTANCE AND HYSTERESIS MOTORS |
Chapter 10 - Stepping and Switched-reluctance Motors |
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Sommario/riassunto |
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Electric Motors and Drives is intended for non-specialist users of electric motors and drives, filling the gap between maths- and theory-based academic textbooks and the more prosaic 'handbooks', which provide useful detail but little opportunity for the development of real insight and understanding. The book explores all of the widely-used modern types of motor and drive, including conventional and brushless D.C., induction motors and servo drives, providing readers with the knowledge to select the right technology for a given job.The third edition includes additional diagrams and wor |
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2. |
Record Nr. |
UNINA9910144126303321 |
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Titolo |
Nitrides with nonpolar surfaces : growth, properties, and devices / / edited by Tanya Paskova |
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Pubbl/distr/stampa |
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Weinheim, [Germany] : , : Wiley-VCH Verlag GmbH & Co. KGaA, , 2008 |
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©2008 |
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ISBN |
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1-281-94714-8 |
9786611947149 |
3-527-62315-9 |
3-527-62316-7 |
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Descrizione fisica |
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1 online resource (460 p.) |
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Disciplina |
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Soggetti |
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Nitrides |
Nitrides - Electric properties |
Crystal growth |
Electronic books. |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Note generali |
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Description based upon print version of record. |
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Nota di bibliografia |
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Includes bibliographical references at the end of each chapters and index. |
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Nota di contenuto |
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Nitrides with Nonpolar Surfaces; Contents; Preface; List of Contributors; Color Plates; Introduction; 1 Nitride Materials and Devices with Nonpolar Surfaces: Development and Prospects; 1.1 Introduction; 1.2 Historical Survey of Nonpolar Nitride Growth Achievements; 1.3 Nonpolar Nitrides Today - Key Properties and Challenges; 1.3.1 Morphology; 1.3.2 Microstructure; 1.3.3 Strain; 1.3.4 Optical Properties; 1.3.5 Optical Phonons; 1.3.6 Electrical Properties; 1.4 Nonpolar and Semipolar Nitride-based Devices Today; 1.5 Prospects in the Development of Nonpolar Nitrides and Devices; 1.6 Summary |
AcknowledgmentsReferences; Part I Growth; 2 Growth of Planar and Reduced-defect Density Nonpolar GaN Films by Hydride Vapor Phase Epitaxy; 2.1 Introduction; 2.2 Planar a-plane GaN Growth; 2.3 Lateral Epitaxial Overgrowth of a-plane GaN Films; 2.4 Planar m-plane GaN Heteroepitaxy; 2.5 Lateral Epitaxial Overgrowth of m-plane GaN; 2.6 |
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Conclusion; References; 3 Nonpolar GaN Quasi-Wafers Sliced from Bulk GaN Crystals Grown by High-Pressure Solution and HVPE Methods; 3.1 Introduction; 3.2 Bulk Crystallization of GaN; 3.2.1 Seed Crystals; 3.2.2 Bulk Crystallization of GaN by HVPE on Small Seeds |
3.2.3 HVPE of GaN on Platelet-shaped Seeds3.2.4 HVPE of GaN on Needle-shaped Seeds; 3.3 Nonpolar Quantum Structures; 3.3.1 GaN/AlGaN Quantum Structures Grown by PA Molecular Beam Epitaxy; 3.3.2 Optical Properties of Nonpolar Structures Grown on GaN Quasi-Wafers Sliced from Bulk GaN Crystals; 3.4 Summary; Acknowledgment; References; 4 Heteroepitaxial Growth of Nonpolar-face AlN on SiC Substrates by Plasma-assisted Molecular-beam Epitaxy; 4.1 Introduction; 4.2 The Crystalline Structure of AlN and SiC; 4.3 AlN/6H-SiC (1100); 4.4 AlN/6H-SiC (1120); 4.5 AlN/4H-SiC (1120) |
4.6 Reducing Structural Defect Densities in 4H-AlN4.7 AlN/4H-SiC (1100); 4.8 Properties of 4H-AlN; 4.9 Nonpolar AlGaN and AlGaN/AlN Heterostructures; 4.10 Conclusion; Acknowledgments; References; 5 Metalorganic Vapor Phase Epitaxial Growth of Nonpolar Al(Ga,In)N Films on Lattice-Mismatched Substrates; 5.1 Introduction; 5.2 Growth and Properties of a-plane GaN on r-plane Sapphire; 5.3 Growth and Properties of m-plane GaN on m-plane SiC; 5.4 Growth of GaN on Semipolar (3038) 4H-SiC Substrate |
5.5 Reduction of Dislocation Density and Stacking-fault Density by Sidewall Seeded Epitaxial Lateral Overgrowth5.6 Conductivity Control of Nonpolar GaN; 5.6.1 n-type GaN; 5.6.2 p-type GaN; 5.7 Heterostructures; 5.7.1 GaInN/GaNMQWs; 5.7.2 AlGaN/GaN Single Heterostructure; 5.8 Characterization of Visible LEDs on Nonpolar GaN; 5.9 Summary; Acknowledgments; References; Further Reading; 6 GaN Films and Quantum Wells with Nonpolar Surfaces: Growth and Structural Properties; 6.1 Introduction; 6.2 Substrates; 6.2.1 γ-LiAlO(2); 6.2.1.1 Properties and Merits; 6.2.1.2 Drawbacks |
6.2.1.3 Orientation Relationship andMicrostructure |
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Sommario/riassunto |
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This is the first monograph to discuss in detail the current stage of development of nonpolar nitrides, with specific emphasis on the three main topics of crystal growth, properties and device studies. World-class researchers summarize their own recent achievements in their respective fields of expertise, covering both nonpolar and semipolar nitride materials. The bulk of the discussion in each chapter is related to the physical properties of the material obtained by the respective technique, in particular, defect density and properties of the defects in nonpolar nitrides. In addiiton, the |
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3. |
Record Nr. |
UNINA9910816981603321 |
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Autore |
Hewlin Todd |
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Titolo |
Goliath's revenge : how established companies turn the tables on digital disruptors / / Todd Hewlin, Scott A. Snyder |
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Pubbl/distr/stampa |
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Hoboken, New Jersey : , : Wiley, , 2019 |
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ISBN |
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1-119-54191-3 |
1-119-54190-5 |
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Edizione |
[1st edition] |
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Descrizione fisica |
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1 online resource (291 pages) |
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Classificazione |
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BUS041000BUS000000BUS071000 |
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Disciplina |
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Soggetti |
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Information technology - Management |
Business enterprises - Technological innovations - Management |
Electronic records |
BUSINESS & ECONOMICS / Management |
BUSINESS & ECONOMICS / General |
BUSINESS & ECONOMICS / Leadership |
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Lingua di pubblicazione |
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Formato |
Materiale a stampa |
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Livello bibliografico |
Monografia |
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Note generali |
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Nota di contenuto |
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Machine generated contents note: Foreword Chapter 1 How Much Time Do You Have? Chapter 2 The Incumbent's Advantage Chapter 3 Winner Takes Most Chapter 4 Rule #1: Deliver Step-Change Customer Outcomes Chapter 5 Rule #2: Pursue Big I and Little I Innovation Chapter 6 Rule #3: Use Your Data as Currency Chapter 7 Rule #4: Accelerate Through Innovation Networks Chapter 8 Rule #5: Value Talent Over Technology Chapter 9 Rule #6: Reframe Your Purpose Chapter 10 Company View: Your Disruptor's Playbook Chapter 11 Career View: Disrupt Yourself Appendix New Rules Templates About the Authors Index. |
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Sommario/riassunto |
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Harness your company’s incumbent advantages to win the digital disruption game Goliath’s Revenge is the practical guide for how executives and aspiring leaders of established companies can run the Silicon Valley playbook for themselves and capitalize on digital disruption. Technologies like artificial intelligence, robotics, internet of things, blockchain, and immersive experiences are changing the basis of competition in every industry. New competitors are emerging while |
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traditional ones are falling behind. Periods of intense change provide remarkable opportunities. Goliath’s Revenge delivers an insider’s view of how industry leaders like General Motors, NASA, The Weather Channel, Hitachi, Mastercard, Procter & Gamble, Penn Medicine, Discovery, and Cisco are accelerating innovation, building new skills, and disrupting themselves to come out stronger in this post-digital age. Learn how to leverage your company’s scale, reach, data, and expertise to launch breakthrough offerings that fend off attackers and secure your position as a future industry leader. Using real success cases and recommendations, this invaluable resource shows how to realign your business model, reset your talent development priorities, and retake market share lost to digital-ready competitors. Drawing from extensive experience in digital transformation, leadership development, and strategic planning, the authors show how established companies can switch from defense to offense to thrive in this new digital environment. Learn the six new rules that separate winners from losers in the age of digital disruption Prioritize your innovation investments to rebuild your competitive moat Employ smart cannibalization to defend your core business Deliver step-change customer outcomes to grow into adjacent markets Reframe your purpose and make talent the centerpiece of your digital innovation strategy Goliath’s Revenge is a must-read for business leaders and innovators in small, mid-sized, and large organizations trying to win the digital disruption game. This book helps you reset both your company strategy and professional development priorities for long-term success. |
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