Download or read book AC DC Motors and Generators written by and published by . This book was released on 2014 with total page 383 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book AC DC Motors and Generators written by Lab-Volt (Québec) Ltd and published by [Ste. Foy, Québec] : Lab-Volt. This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Direct Current Generators written by A. Bhatia and published by CreateSpace. This book was released on 2015-02-21 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: A direct current generator, or DC generator, produces a voltage of constant polarity, which means the voltage and current do not change over time. DC generators are basically AC generators whose output voltage is switched the other way round at the proper moment, so that the direction of the voltage is always in a single direction. The AC generator uses slip rings to transfer the current to the electrical circuit, while the DC generator uses a split-ring commutator. Generators can be very small or quite huge. Commercial DC generators are commonly found in traction applications like subways and trains. Factories that do electrolysis, electroplating and those that produce aluminum, caustic soda, chlorine, and some other industrial materials need large amounts of direct current and use DC generators.An electric motor is very similar to a generator, except that power is provided to turn the rotors. They may, in fact, be described as generators "running backwards". When current is passed through the armature of a DC motor, a torque is generated by magnetic reaction, and the armature revolves. Adjustable speed is difficult to obtain with motors whose armatures are connected to fixed frequency power lines (AC motors). Here is where DC motors shine; their rotating field speed depends on the rotor speed itself. The speed of DC series motors varies with load, and torque varies inversely with speed. This makes them particularly suitable to starting high inertia loads such as railway trains. Starting a DC motor requires often an external resistor or rheostat to limit the current. The value, in Ohms, of that resistor is reduced in steps as the speed of the motor increases, until finally that resistor is removed from the circuit as the motor reaches close to its final speed.This 4-hr Quick Book provides discusses salient features of DC motors and generators in detail. The course is based entirely on Naval Education and Training Materials (NAVEDTRA 14177), Electricity and Electronic Training Series; Module-5 and covers Chapter 1 and 2 titled “Direct Current Generators and Direct Current Motors”. Learning ObjectiveAt the conclusion of this course, the reader will be able to:• State the principle by which generators convert mechanical energy to electrical energy.• State the rule to be applied when you determine the direction of induced emf in a coil.• State what component causes a generator to produce direct current rather than alternating current.• State how field strength can be varied in a dc generator.• State the three classifications of dc generators.• State the term that applies to voltage variation from no-load to full-load conditions and how it is expressed as a percentage.• State the factors that determine the direction of rotation in a dc motor.• State the right-hand rule for motors.• Describe the main differences and similarities between a dc generator and a dc motor.• List the advantages and disadvantages of the different types of dc motors.• Discuss the means of controlling the speed and direction of a dc motor.• Explain the need for a starting resistor in a dc motor.
Download or read book AC DC Motors and Generators written by Lab-Volt (Québec) Ltd and published by [Ste. Foy, Québec] : Lab-Volt. This book was released on 1998-01-01 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book AC DC Motors and Generators written by and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book AC DC Motors and Generators written by Lab-Volt (Québec) Ltd and published by [Ste. Foy, Québec] : Lab-Volt. This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book AC DC Motors and Generators written by Lab-Volt (Québec) Ltd and published by . This book was released on 1996-08-01 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book AC DC Motors and Generators written by Lab-Volt (Quebec) Ltd and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book AC DC Motors and Generators written by Lab-Volt (Québec) Ltd and published by [Ste. Foy, Québec] : Lab-Volt. This book was released on 1997 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book AC DC Motors and Generators written by and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Current Industrial Reports written by and published by . This book was released on 1988 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Alternating Current Generators written by A. Bhatia and published by CreateSpace. This book was released on 2015-02-18 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: An alternating current generator, or AC generator, produces an alternating current, which means the voltage produced alternately reverses from positive to negative polarity, producing a corresponding change in the direction of current flow. Much like a DC generator, an AC generator requires a coil to cut across the force lines of a magnetic field. This coil is attached to two slip rings, which deliver the current to and from the load destination, thus completing the circuit. Alternating current generators are often called "Alternators." The magnitude of AC voltage generated by an AC generator is dependent on (1) The strength of the magnetic field (number of lines of force) (2) The speed at which the loop rotates (3) The number of loops of wire that cut the magnetic field. A rotation speed of 3000 revolutions per minute(RPM) produces 50 Hz, and 3600 RPM produce 60 Hz. The electric current in North American homes has a frequency of 60 hertz while in Europe it is 50 Hz. An alternating current motor, or AC motor uses electrical energy to procude motion and torque. Very simple AC motors are called "Squirrel cage motors"; these have only one or more stationary coils within which a special kind of mechanical rotor is free to rotate. There is no electrical connection to the rotor from the outside. Most AC motors require a starter, or method of limiting the inrush current to a reasonable level. Types of motor starting include reactive (capacitor start and inductive start), and electronic (frequency drives and soft start drives).The reactive start method is usually used on fractional horsepower motors, and the electronic method is usually reserved for larger motors. This 4-hr Quick Book provides a basic understanding of AC motors and generators, explaining how to use them, how to calculate power, and determine torque considerations. The course is based entirely on Naval Education and Training Materials (NAVEDTRA 14177), Electricity and Electronic Training Series; Module-5 and covers Chapter 3 and 4 titled "Alternating Current Generators and Alternating Current Motors." Learning Objective At the conclusion of this course, the reader will be able to: Describe the principle of magnetic induction as it applies to AC generators. Describe the differences between the two basic types of AC generators. Explain the factors that determine the maximum power output of an AC generator. Describe the relationships between the individual output and resultant vectorial sum voltages in multiphase generators. List the factors that determine the frequency and voltage of the alternator output. Describe the purpose and procedure of parallel generator operation. List three basic types of AC motors and describe the characteristics of each type. Describe the characteristics of a series motor that enable it to be used as a universal motor. State the primary application of synchronous motors, and explain the characteristics that make them suitable for that application. Describe the features that make the AC induction motor the most widely used of electric motors. Explain the operation of split-phase windings in single-phase AC induction motors. Describe the effects of shaded poles in single-phase, AC induction motors.
Download or read book Current Industrial Reports written by and published by . This book was released on 1964 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Electric Circuits and Machines written by Eugene C. Lister and published by McGraw-Hill Companies. This book was released on 1975 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: Majors and non-majors in electricity will benefit from this easy-to-understand and highly illustrated introduction to DC and AC electrical theory, circuits, and equipment. The only prequisites are algebra and a basic knowledge of trigonometry. This updated edition reflects changes in industry resulting from increasing computerization of electrical equipment. Modern solid-state components are covered in appropriate sections throughout the book. These components are especially featured in the area of industrial controls.
Download or read book Armature Winding and Motor Repair written by Daniel H. Braymer and published by Read Books Ltd. This book was released on 2011-03-23 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt: First published in 1920, this comprehensive manual on armature winding and motor repair offers a detailed collection of practical electrical methods to fix motor and generator problems. To be used by maintenance specialists and electrical engineers, Daniel H. Braymer’s compilation of material was obtained through practical engagement in repair shop work, power station work and the maintenance of motors in industrial plants. Full of firsthand experience, the volume will provide answers to those needing assistance in armature winding and many other electrical problems that can occur within the workshop. Chapters in this volume include: Direct Current Windings Alternating Current Windings Repair Shop Methods for Rewinding D-C Armatures Testing Direct-Current Armature Windings Insulating Coils and Slots for D-C and A-C Windings Practical Ways for Reconnecting Induction Motors Inspection and Repair of Motor Starters, Motors and Generators Machine Equipment and Tools Needed in a Repair Shop Republished by Read & Co. Books, Armature Winding and Motor Repair continues to be considered a valuable asset within the subject. It provides a handy guide for any practical repairman looking to enlarge their knowledge of solving electrical problems while also appealing to amateurs just starting in the field.
Download or read book Motors as Generators for Micro Hydro Power written by Nigel Smith and published by . This book was released on 2008 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a guide to the use of induction motors for electricity generation in remote locations. It is written as a practical handbook for engineers and technicians involved in designing and installing small water-power schemes for isolated houses and communities. This revised edition brings in new concepts developed and tested to expand the power range of application of motors as generators, to make this technology safer and more reliable, while keeping costs low and making it accessible to developing countries. It also contains a new chapter on mains-connecting micro-hydro generators. This edition also draws on the practical experience of manufacturers and installers of induction generator units working in village locations in a large number of countries, among them Sri Lanka, Nepal, Peru, Kenya and others.
Download or read book Motors Generators Transformers and Energy written by Pericles Emanuel and published by Prentice Hall. This book was released on 1985 with total page 491 pages. Available in PDF, EPUB and Kindle. Book excerpt:
