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Lecture-7: Modeling of Real World Systems
Lecture-7: Modeling of Real World Systems

... An armature controlled D.C motor runs at 5000 rpm when 15v applied at the armature circuit. Armature resistance of the motor is 0.2 Ω, armature inductance is negligible, back emf constant is 5.5x10-2 v sec/rad, motor torque constant is 6x10-5, moment of inertia of motor 10-5, viscous friction coeffi ...
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...  If one of the resistances is extremely large then the voltage across it is almost the same as the voltage supply. ...
Welcome to this training module which looks at the hardware
Welcome to this training module which looks at the hardware

... The inverter converts the DC voltage into AC voltage with variable frequency and amplitude. The inverter comprises six diodes and six IGBTs. The inverter is connected to the motor. Motor control program and control electronics control the switching of the IGBTs to form the required voltage waveform ...
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Lecture 23 Chapter 31 Induction and Inductance
Lecture 23 Chapter 31 Induction and Inductance

... – Holding it close to a coil (solenoid) and changing the current in the coil – Keep the current in the coil constant but move the coil relative to the loop – Rotate the loop in a steady B field – Change the shape of the loop in a B field ...
Electromagnetic fields at home
Electromagnetic fields at home

... High voltage is used in the transportation of electric energy over large distances, since the corresponding reduced current results in lower power loss. However, at homes and offices, one use lower voltages for safety reasons, at an expense of higher currents. However, since the wiring is short with ...
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE)

... environmental pollution go hand-in-hand for making a growth in renewable energy exploitation. These main reasons create awareness in all electrical engineering to harvest electrical power from renewable energy sources such as wind energy and photo-voltaic (PV) systems [1]-[2]. Moreover, renewable en ...
``The use of electric motors for the propulsion of seagoing vessels
``The use of electric motors for the propulsion of seagoing vessels

Understanding Generator Stator Ground Faults
Understanding Generator Stator Ground Faults

... faults on the stator. Similarly, the generator makes very little contribution to system ground faults. In addition, the voltage displacement that occurs for a generator ground fault is not seen in the power system. Section IV in this paper looks at the impact of interwinding capacitance in more deta ...
Demagnetisation of Permanent Magnets in Electrical Machines
Demagnetisation of Permanent Magnets in Electrical Machines

... non-usual loading. In fast rotating machines with narrow air gaps, the eddy currents can cause a rise of temperature in permanent magnets because most PM materials are conducting materials. There are several methods to eliminate these eddy currents is electrically conductive magnetic materials: ...
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Trouble with Maxwell`s Electromagnetic Theory: Can Fields Induce

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Unit 32 Three-Phase Motors

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Stepper Motor Speed Control

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Products and solutions for power factor correction

... Configuration and maintenance operations, often done in intolerable ambiance due to weather or noisy conditions, are now easier to do for all LOVATO Electric products with communication interface on front compatible with CX02 dongle. Indeed, tablets and smartphones with Android or iOS operating syst ...
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... ferrite toroid with two HE sensor chips inserted in a gap within the toroid. The main current carrying conductor passes through the center of the toroid, generating a magnetic field. The HE sensor senses this field in the gap of the toroid. A sensor has been selected that offers advanced features, i ...
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... economics relatively insensitive to overall current density. Also, their stored energy is so large to necessitate the use of fully stabilized conductors. On the other hand, current densities of small size coils are very low, and there is no need to use stabilized conductors. Intermediate sized coils ...
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photo voltaic microinverter control for grid-connected

... In a fourth-order linear-phase IIR filter has been synthesize for the repetitive voltage controller for UPS systems. Compared with the conventional linear-phase finite impulse response filters used for RC, the linear-phase IIR filter exhibits a flat gain in the pass band. Hence, it is a good candida ...
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Mechanical Dissection Laboratory Power Hand Drill Instructors : Drs

THE TITLE OF PAPER, IN BOLD CAPITAL LETTERS
THE TITLE OF PAPER, IN BOLD CAPITAL LETTERS

... Keywords: Electrical Machinery Control, Electrical Drives, Power electronics. ...
Relation between magnetic fields and electric currents in plasmas
Relation between magnetic fields and electric currents in plasmas

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2. electrostatic potential and capacitance

electrical engineering practice lab manual
electrical engineering practice lab manual

... 2. Electricity NEVER EXCUSES careless persons. So, exercise enough care and attention in handling electrical equipment and follow safety practices in the laboratory. (Electricity is a good servant but a bad master). 3. Avoid direct contact with any voltage source and power line voltage. (Otherwise, ...
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... 1. To study the principles of tap changing, tests and auto-transformer. 2. To understand different types of three phase induction motors. 3. To discuss about speed control and starting methods of three phase induction motors. 4.To analyze unbalanced operation of three phase induction motors and thre ...
DC magnetic field generator with spatial coils arrangement
DC magnetic field generator with spatial coils arrangement

< 1 ... 107 108 109 110 111 112 113 114 115 ... 378 >

Electric machine

The academic study of electric machines is the universal study of electric motors and electric generators. By the classic definition, electric machine is synonymous with electric motor or electric generator, all of which are electromechanical energy converters: converting electricity to mechanical power (i.e., electric motor) or mechanical power to electricity (i.e., electric generator). The movement involved in the mechanical power can be rotating or linear.Although transformers do not contain any moving parts they are also included in the family of electric machines because they utilise electromagnetic phenomena.Electric machines (i.e., electric motors) consume approximately 60% of all electricity produced. Electric machines (i.e., electric generators) produce virtually all electricity consumed. Electric machines have become so ubiquitous that they are virtually overlooked as an integral component of the entire electricity infrastructure. Developing ever more efficient electric machine technology and influencing their use are crucial to any global conservation, green energy, or alternative energy strategy.
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