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Dr. Hidaia Mahamed Alassouli Power Electronics

Lecture Notes of Power Electronics Course

Technik
Englisch
4192 Wörter
Keine Altersempfehlung
1
0

This book includes my lecture notes for power electronics course course. The characteristics and operation of electronic power devices, firing circuits, and driving circuits for power converters are described and implemented practically in the laboratory. Uncontrolled and controlled, single phase rectifiers are used in various electrical power applications. DC to DC power conversion circuits are investigated. Circuit simulation and practical laboratories are utilized to reinforce concepts. The book is divided to different learning parts • Part1- Describe the characteristics and operation of electronic power devices.• Part2- Describe firing and driving circuits for power electronic converters.• Part3- Analyse the use of uncontrolled and controlled single-phase rectifiers in various electrical power applications.• Part4- Investigate the DC-to-DC power conversion circuits used in power applications.Part1: Describe the characteristics and operation of electronic power devices.1. Describe diode characteristics, types (power diode, general-purpose, and fast recovery), and connections (series, parallel and freewheeling).2. Describe thyristor characteristics, two-transistor model, and purpose of di/dt and dv/dt protection.3. Describe the power MOSFET and IGBT characteristics.4. Compare electronic power devices in terms of various power converter applications, frequency of operation (switching speed), rating, and switching power losses.Part 2: Describe firing and driving circuits for power electronic converters.1. Describe ideal and non-ideal properties of operational amplifiers. Determine the operation of various related circuits (inverting and non-inverting amplifiers, buffer amplifier, summing amplifier)2. Describe the use of an operational amplifier for PWM generation, for triangular and sine wave generation, as a comparator, and its integration into a 555 timer.3. Explore other basic firing and driving circuits by focusing on requirements and control features such as based on specific power devices and operational amplifier.Part 3: Analyse the use of uncontrolled and controlled single-phase rectifiers in various electrical power applications.1. Determine the performance characteristics of uncontrolled single-phase, half-wave and full-wave rectifiers, with resistive and inductive loads.2. Determine the performance characteristics of controlled single-phase, half-wave and full-wave rectifiers with resistive and inductive loads.3. Determine the change in power factor when using uncontrolled and controlled rectifiers. Define input distortion and displacement factor.4. Describe how power inversion may be achieved by varying the firing angle in controlled rectifiers.Part 4: Investigate the DC-to-DC power conversion circuits used in power applications.1. State the principle of step-down and step-up operations.2. Explain the DC chopper classification and describe switch-mode regulators3. Explain the operation of buck, boost4. Explain the operation buck-boost regulators. [mehr]

Stichwörter: Hidaia Alassouli, Power Electronics

9,99 US$

BR Raksun Limited Power

Money is power, but unfortunately it is limited.

Belletristik
Englisch
1269 Wörter
Ab 12 Jahren
108
1

“Money is power. You are wasting your power.” The minister is looking at Dev and Sridhar. They looked at the minister. “Money is power for powerless. Real power is aspiration.” Dev said. “What do you get for your great services in a village?” “Village is the basic place where we are born. We want to show that we are for our village.” Sridhar said. “We will get money from our services in foreign countries.” Dev said. “Our services are not limited.” Sridhar said. “Is the power of money limited?” minister asked. What next? Please read the story and decide. [mehr]

Stichwörter: Money power Minister Village developers

Kostenlos

BR Raksun Power Source

Nature is spread inside with hidden power source.

Lyrik und Poesie
Englisch
368 Wörter
Ab 12 Jahren
88
0

Nature is spread outsidewith hidden Strength Fierce. Nature is spread insidewith hidden power source. Nature is sweet as lovewith so [mehr]

Stichwörter: Power Source Nature Inside outside

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fanfiction author Bella's power

i dont own anything

Belletristik
Englisch
15355 Wörter
Keine Altersempfehlung
1073
32

in twilight when bella feels electricity from edward in bio class what if it wasnt just edward that [mehr]

Stichwörter: bella, cullen, twilight, power, electric

Kostenlos

Jackson Green Power Magick

Fifty of the Most Powerful Spells Ever Created

Esoterik
Englisch
9483 Wörter
Ab 12 Jahren
529
3

Power Magick - Fifty of the Most Powerful Spells Ever Created contains a collection of the most famous and effective spells for all occasions. Spells will not only help you to achieve success in your career, to get protection from evil forces, but also the book will help you to find your real love. This book is a collection of different kinds of spells. There are different money spells, love spells, protection spells, purification spells, spells for beauty, attraction spells, spells for driving away evil, money spells, prosperity spells, nightmare spells, health spells, spells which can help you to loos your weight and many others. Also in the book are many descriptions of different rituals and the lists of ingredients you need. This book is an indispensable addition to the private collection of magic books for a beginner magician, or highly experienced warlocks and witches. The Spell power of this book has been verified by time and tested by many wizards and other masters of the craft. I am sure that this book will help you in your magical practice. [mehr]

Stichwörter: power magick, magic power, magick, magic, spells, magic spells, magick spells, wicca, witchcraft, love, money, protection, new age spirituality, occult

2,99 US$

Dr. Hidaia Mahmood Alassouli Power Factor Correction Through Reactive Power Compensators

Technik
Englisch
15957 Wörter
Ab 6 Jahren
1
0

Power systems have two components of apparent power: active and reactive power. Both components are necessary for functioning of electrical systems. The active power is the average power absorbed by the resistive load. The reactive power is the measure of energy exchange between the source and reactive power of load. Energy storage devices do not dissipate or supply power, but exchange power with the rest of system. Active power is the one that is converted to other forms of energy in the load yet reactive power is only responsible for magnetizing purposes. Power factor is a ratio depicting how much of the power supplied is real. The reactive current contribute in the value of the overall magnitude of current in transmission lines causing unnecessarily high line currents and low power factor. Since a low power factor means higher amount of apparent power need to be supplied by the utility company, thus the company must also use bigger generators, large transformers and thicker transmission/distribution lines. This requires a higher capital expenditure and operational cost which usually result in the cost being passed to the consumer.In this research, we seek to identify the effects of a low power factor on Swaziland Electricity Company’s power supply system and recommend possible solutions to the problem. The results are useful in determining how to optimally deliver power to a load at a power factor that is reasonably close to unity, thus reducing the utility’s operational costs while increasing the quality of the service being supplied. [mehr]

Stichwörter: Hidaia Alassouli, Reactive Power Compensator, Reactive Power Compensation, Capacitor, Power Factor Correction, Statcom, FACTS Devices, Active Power, Power Flow, Static Var Compensator, Swaziland Electricity Company

9,99 US$

wfriesen power and love

which one will be chosen

Liebe
Englisch
31 Wörter
Keine Altersempfehlung
263
2

Chris had always dreamed of having every power imaginable, but he had also dreamed of finding true love [mehr]

Stichwörter: love, power, magic, elements, werewolf, vampire

Kostenlos

Dr. Hidaia Mahmood Alassouli Lecture Notes of Distribution of Electric Power Course

Lecture Notes of Distribution of Electric Power Course

Technik
Englisch
5040 Wörter
Keine Altersempfehlung
3
0

This book includes my lecture notes for electrical power distribution book. The fundamentals of electrical power distribution are applied to various distribution system layouts and the function of common distribution system substations and equipment. The book introduces the design procedures and protection methods for power distribution systems of consumer installations. Circuit simulation and practical laboratories are utilised to reinforce concepts.The book is divided to different learning outcomes• CLO 1- Discuss the fundamental concepts related to electrical distribution systems.• CLO 2- Explain the role of distribution substations and related equipment.• CLO 3- Outline standard methods for power distribution to consumer installations.• CLO 4- Apply short-circuit and over-load protection principles for electrical installationsa) CLO1- Discuss the fundamental concepts related to electrical distribution systems.• Principle of operation of transformers.• Explain the role of the distribution system in a power system, common distribution system layouts, and common voltages, voltage drops and regulation levels from transmission to distribution.• Discuss demand, power quality issues, calculate factors affecting design, and interpret the load curve profile for load demand.• Explain how tariff is calculated and charged consumersb) CLO2- Explain the role of distribution substations and related equipment.• Explain the function of the distribution substation in view of distribution system layout• Explain the use of transmission, grid, primary and distribution substations a power system.• Explain the use of various types of bus-bar configurations in distribution substations.• Discuss the use of cabling, transformers, circuit breakers, switches, reclosers, and sectionalisers in a distribution system.c) CLO3- Outline standard methods for power distribution to consumer installations.• Discuss commonly used methods for low voltage power supply systems (TN, TN-C, TN-C-S and TT).• Discuss the main features of a one-line, electrical installation diagram and related symbols.• Discuss electrical color codes and factors affecting cable installations.• Design an electrical feeder by (1) selecting the design current, (2) selecting the overload current protection, (3) determining the applicable correction factors, (4) selecting the current-carrying capacity of cable and cable sizing, and (5) calculating the allowable voltage drop in feederd) CLO4- Apply short-circuit and over-load protection principles for electrical installations.• Explain the meaning of overload and over-current and methods of protection• Discuss the nature of electric shock, need for earthing, earth loop impedance, and principle of protective multiple earthing.• Explain the principles of fuse/MCB selection in relation to feeder protection under overload and short circuit fault conditions.• Explain the operation of earth leakage circuit breakers (ELCB) and residual current device (RCD). [mehr]

Stichwörter: Hidaia Alassouli, Power System, Power Distribution, Power Transmission, Distribution Substations, Power Quality, Transformer, power protection, Earthling, Circuit Breaker, ELCB

9,99 US$

Rittik Chandra The Power of Calmness

Ratgeber
Englisch
8429 Wörter
Keine Altersempfehlung
198
1

Philosopher and Management Coach Rittik Chandra’s "The Power of Calmness"presents the Supremacy of Calmness. Calmness comes ever from within. It is the peace and restfulness of the depths of our nature. The fury of storm and of wind agitate only the surface of the sea; they can penetrate only two or three hundred feet,--below that is the calm, unruffled deep. To be ready for the great crises of life we must learn serenity in our daily living. Calmness is the crown of self-control. Calmness is the rarest quality in human life. It is the poise of a great nature, in harmony with itself and its ideals. It is the moral atmosphere of a life self-centred, self-reliant, and self-controlled. Calmness is singleness of purpose, absolute confidence, and conscious power,--ready to be focused in an instant to meet any crisis. [mehr]

Stichwörter: Calmness, power, knowledge, motivation, inspiration, self, control

0,99 US$

Rittik Chandra The Power of Simplicity

Ratgeber
Englisch
36450 Wörter
Keine Altersempfehlung
147
1

Philosopher and Management Coach Rittik Chandra’s "The Power of Simplicity" explains that the spirit of simplicity is a great magician. Simplicity is a state of mind. It dwells in the main intention of our lives. A man is simple when his chief care is the wish to be what he ought to be, that is, honestly and naturally human. And this is neither so easy nor as impossible as one might think. At bottom, it consists in putting our acts and aspirations in accordance with the law of our being, and consequently with the Eternal Intention which willed that we should be at all. It softens asperities, bridges chasms, draws together hands and hearts. The forms which it takes in the world are infinite in number; but never does it seem to us more admirable than when it shows itself across the fatal barriers of position, interest, or prejudice, overcoming the greatest obstacles, permitting those whom everything seems to separate to understand one another, esteem one another, love one another. This is the true social cement, that goes into the building of a people. [mehr]

Stichwörter: Simplicity, simple, power, inspiration, motivation, success

1,99 US$

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