PCEL-4302 ELECTRICAL MACHINES-II

LECTURE NOTES ON ELECTRICAL MACHINES-II Fig.3.2: The effects of armature reaction in a salient-pole synchronous generator. The rotor magnetic field induces a voltage in the stator which becomes maximum in the conductors directly under the pole faces (Fig.3.2.a). When a lagging load is connected to the

  Machine

LECTURE NOTES ON MECHATRONICS

conditioning Monitoring, Mechatronic Control in Automated Manufacturing, Micro sensors in ... domestic washing machines are “intelligent” and four-wheel passenger ... Due to these demands and competition in the market, manufacturers are thriving to …

  Machine, Market, Monitoring, Washing, Washing machine

Power System Protection

Ex: Differential protection, frame leakage protection The systems in which selectivity is relative are non-unit systems. Ex: current time graded protection, distance protection. 1.7 Basic Principle of Operation of Protective relay Each relay in a protection scheme performs a certain function and responds in a given

  Differential

HVDC Transmission Systems UNIT-1

development of Voltage Source Converters (VSC) and the use of rugged polymer DC cables, with the so-called “HVDC Light” option, are being increasingly considered. An example of this type of application is the 180 MW Direct link connection (2000) …

  Hvdc

LECTURE NOTES ON

Global Mobile Satellite Systems ; case studies of the IRIDIUM, ICO and GLOBALSTAR systems. Wireless Enterprise Networks : Introduction to Virtual Networks, Blue tooth technology, Blue tooth Protocols. Server-side programming in Java, Pervasive web application architecture, Device independent example application. Text Books: 1.

  Globalstar

DATA STRUCTURES USING

C array declaration. Arrays can be declared in various ways in different languages. For illustration, let's take C array declaration. As per the above illustration, following are the important points to be considered. Index starts with 0. Array length is 10 which means it can store 10 elements. Each element can be accessed via its index. For ...

LECTURE NOTES ON OPERATING SYSTEM - College of …

Dual-mode operation allows OS to protect itself and other system components o User mode and kernel mode o Mode bit provided by hardware Provides ability to distinguish when system is running user code or kernel code Some instructions designated as …

  Dome, Running

LECTURE NOTES ON

Theoretical concepts of plasticity, Yield criteria - Tresca and Von Mises criterion of yielding, Plastic stress strain relationship, Elastic plastic problems in bending and torsion. Text Books 1. Timoshenko, S. and Goodier J.N. Theory of Elasticity, McGraw Hill Book Co., Newyork, 1988. 2. J.

  Criteria, Yield, Plasticity, Yield criteria

COLLEGE OF ENGINEERING AND TECHNOLOGY, …

Artificial Intelligence is a way of making a computer, a computer-controlled robot, or a software think intelligently , in the similar manner the intelligent humans think. AI is accomplished by studying how human brain thinks and how humans learn, decide, and

  Intelligence, Artificial, Artificial intelligence

LECTURE NOTES ON - College of Engineering and Technology ...

ULTRASONIC MACHINING (USM): USM is mechanical material removal process or an abrasive process used to erode holes or cavities on hard or brittle workpiece by using shaped tools, high frequency mechanical motion and an abrasive slurry. USM offers a solution to the expanding need for machining brittle materials such ...

  Ultrasonic, Machining, Ultrasonic machining

EE 340 Spring 2011 - UNLV

The rotor of a synchronous machine is a large electromagnet. The magnetic poles can be either salient (sticking out of rotor surface) or non- ... • It is possible to adjust the field current on the main machine by controlling the small DC field current …

  Machine, Current, Field, Synchronous, Synchronous machines, Field current

Permanent Magnet Synchronous Motor Control

negative d-axis required current will increase the speed range, but the applicable torque is reduced because of a stator current limit. Manipulating the d-axis current into the machine has the desired effect of weakening the rotor field, which decreases the BEMF voltage, allowing the higher stator current to flow into the motor

  Machine, Current, Field, Synchronous

EE320 Homework # 9 Synchronous Machines

The machine op erates at a pow angle of 31.48 with a field current of 100A. The line-to-neutral terminal voltage is 2400Vrms. a. Find the speed of the prime mover in rad/sec b. Determine the excitation voltage c. Find the line current d. Find the power consumed by the load and its power factor e. Find the developed torque...

  Machine, Current, Field, Synchronous, Homework, Ee302, Ee320 homework, 9 synchronous machines, Field current

Synchronous Machines - Virginia Tech

curve (OCC) and the short-circuit current curve (SCC) for a typical machine. The voltage curve slope begins to decrease as the field current increases due to saturation of the iron in the machine. Figure 12: Open-circuit and short-circuit characteristics of a synchronous machine at rated speed. The impedance is Z = R jX s 1

  Machine, Current, Field, Synchronous, Synchronous machines, Field current

III. Synchronous Motors - University of Technology, Iraq

Suppose the synchronous motor is initially overexcited (in other words, excited with a large field current) and is operating at point , as shown in Figure . 1 . The 3 corresponding armature current . I. is the in-phase component of armature current). 1. is leading . V, and hence the input power factor is leading. Reduction of field current ...

  Current, Field, Synchronous, Field current

Permanent Magnet Synchronous Machine Model for Real

circuit of the machine will be the circuit shown in Fig. 4. Rmmi ω0Ψq Rm d Lmd d dt Ψ + − + − Vd id if d f dt Ψ + − Rs ls Fig. 4. D axis thevenin equivalent circuit of the PMSM This model is similar to the conventional equivalent circuit of the synchronous machine, except there is no leakage inductance on the field. C. Typical data ...

  Machine, Field, Synchronous, Synchronous machines

9.0 GENERATOR, EXCITER, AND VOLTAGE REGULATION

armature field. The large AC current induced into the stationary stator windings is transmitted to the loads by solid connections. This same principle also applies to AC synchronous motors as there is little difference between an AC generator and an AC synchronous motor. It is a matter of what is driving the system – an

  Current, Field, Synchronous

Sensorless Field Oriented Control (FOC) for Permanent ...

2. PMSM motors are also becoming popular in Direct Drive washing machine due to their torque available at very low speeds. FOC enables better dynamic response in a washing machine without increasing the overall system cost. 3. Refrigerator compressors also require better efficiency and torque performance at low speeds.

  Machine, Field