Search

# Aircraft Electrical Power Generation and Distribution - Coursework Example

Summary
Name: Instructor: Course: Date: Q1. Explain how aircraft three-phase electrical generator works. An aircraft AC generator consists of three main parts namely: 1. Alternator. 2. Voltage regulator. 3. Main Generator. The alternators used in aircrafts are mostly brushless with a cooling system incorporated and consists of two main parts; the stator and the rotor…

## Extract of sample"Aircraft Electrical Power Generation and Distribution"

Download file to see previous pages This magnetism in turn induces voltage into an armature which then carries electrical power to generator control unit (GCU). This power is rectified and conducted to exciter field winding. This then induces voltage into exciter output winding field. This output is rectified to DC and flows through the output field winding and it’s induced into the main output coils. A voltage regulator is incorporated to control the voltage generated by the system depending on the load and the engine speed. It consists of a Generator Control Unit that ensures that all the 3 phases produce equal voltages or the difference is within limits. It also has provision to ensure that the frequency is maintained within the desired limits. Over voltage (OV) - When the voltage at the point of reference (POR). Is above 125V, there is a faculty voltage regulator, and the generator control relay (GCR) is de-energized. Q2. Explain with an aid of a diagram how an integrated drive generator (IDE) works. The IDE has 2 main parts. i. A drive. ii. A brushless AC generator. The drive part makes sure that the generator operates at a fixed rpm, regardless of the engine rpm and generator load. The IDG input shaft drives the generator through a reduction gearing and a differential gear. When the generator operates at 12000 rpm the generator frequency is 400 Hz. When the input shaft increases or decreases the frequency of the generator increases or decreases too. This deviation from 400 Hz is detected in the GCU which supplies an electrical signal to a servo valve in the IDG drive part. This servo valve in turn controls through a control cylinder a hydraulic unit which starts to operate in an anti/clockwise direction. Since the hydraulic unit is connected to another input of the differential gear, the generator rpm increase or decrease is less than the rpm fluctuation on the input shaft. As a result, the generator frequency stays approximately constant. The hydraulic unit operates on 240 up to 280 psi. This charge pressure is made by a charge pump and charge relief valve; the charge oil is also used to cool the generator. The oil flow is between 34 and 53 liters. Drain oil from the generator and sump is supplied through a scavenge filter to an external oil cooler by three pumps , which are driven by the accessory drive gear on the differential gear These pumps are generator scavenge pump, sump scavenge and inversion scavenge pump. The accessory drive gear also drives the de-aerator and charge pump. The return oil from the cooler passes the de-aerator and it goes back to the charge pump. Q3. Explain how a transformer rectifier (TRU) works. The TRU as the name suggests is both a transformer and a rectifier. The transformer steps down 12000 V to 28 V while the rectifier converts the 400Hz AC power to DC. The 3 phase AC is routed to the primary side of the transformer and is in connected in star order. Two secondary sides are at the transformer. SEC 1 is in star order while SEC 2 is in delta order. The output of the secondary side is rectified by full wave rectifier circuits. The purpose of the two different secondary sides with separate rectification is to have less ripple of the rectified 28V DC power output. If the temperature of the rectifiers is over a certain limit, overheat switches providing signals to the monitor circuit in the TRU causes the TRU ...Download file to see next pagesRead More
Cite this document
• APA
• MLA
• CHICAGO
(“Aircraft Electrical Power Generation and Distribution Coursework”, n.d.)
(Aircraft Electrical Power Generation and Distribution Coursework)
https://studentshare.org/physics/1450403-aircraft-electrical-power-generation-and.
“Aircraft Electrical Power Generation and Distribution Coursework”, n.d. https://studentshare.org/physics/1450403-aircraft-electrical-power-generation-and.
Click to create a comment or rate a document
CHECK THESE SAMPLES - THEY ALSO FIT YOUR TOPIC
Power Quality in Electrical Power System
...).” (Electrical Notes & Articles) Transients: Transients occur merely because there is some sort of disturbance with the distribution of power system resulting in stopping of motors, switching of capacitors etc. Voltage Fluctuations such as Voltage Sags & Swells These are the changes in voltage that might occur which will result in dimming or tripping of lights. It is observed that sags are more common than swells. Interruptions e.g. Outages and Blinks Interruptions are basically anything that cause disturbance in the proper flow of power voltage. Blinking occurs at times due to these interruptions. • Means of controlling and improving power quality....
6 Pages(1500 words)Assignment
Distributed Electrical Generation
...how electricity can be generated and distributed with regards to each of the independent factors mentioned. TABLE OF CONTENTS CHAPTER # 1 8 INTRODUCTION 9 PROBLEM STATEMENT 11 PURPOSE OF STUDY 11 SCOPE OF STUDY 12 RATIONALE OF STUDY 12 THEORECTICAL FRAMEWORK 13 DEFINITIONS 14 CHAPTER # 2 17 LITERATURE REVIEW 18 COST & PRICING OF ELECTRICITY AND HOUSEHOLD CONSUMPTION 18 NEED RECOGNITION 21 DATA GATHERING PROCESS 22 EVALUATION PROCESS 23 DECISION 23 POST PURCHASE EVALUATION 24 LOW INCOME ENERGY ASSISTANCE 24 ALTERNATIVE SOLUTIONS TO POWER GENERATION 26 GREEN POWER 27 NUCLEAR...
90 Pages(22500 words)Essay
Aircraft electrical power generation and distribution
...from the right engine to power the right distribution-bus and is isolated from the left bus by the Bus Tie Breakers (BTB). The left AC generator supplies power only to the left bus. In case of a generator -failure, the failed generator is isolated by the generator breaker (GB) and BTB close to connect the isolated bus. On some aircrafts the Auxiliary Power Unit (APU) generator could be started during flight and used to carry the load of the failed generator. In that case the left and right busses would once again be isolated. The selector switch isolates...
8 Pages(2000 words)Coursework
Aircraft Electrical and Mechanical Systems
...﻿Aircraft Electrical and Mechanical Systems: Aircraft Electrical Systems Aircraft Pitot-Systems Part 1: Pressure basics 1. The total pressure in a moving body of air This is also referred to as Wind load F = A × P × cd F - Represents force A – area P – Wind pressure Cd – drag coefficient Further modification of the formula developed by Electronic Industry Associations F = A × P × cd × Kz × Gh The new formula factors in Kz, which represents the exposure coefficient Kz= [z/33] ^ (2/7) z- Is the height from ground to center of the object Gh represents the gust response Gh = 0.65 + 0.60/ (h/33) ^ (1/7) h- Being the height of the object 2. Dynamic pressure...
7 Pages(1750 words)Case Study
Electrical power
...friendly form of green energy known as wind power. The process of extracting this kind of energy from the wind occurs when the wind turbines convert the kinetic energy from the wind into mechanical energy (which occurs when the blades of the wind turbine spin and turn the generator) which is then converted into electricity. Composed of a blade and an enclosed structure called a nacelle which contains a drive train, wind turbines are often observed in multiples covering several square kilometres known as wind farms, these turbines are mounted on bases between 80-100 meters high with offshore turbines being higher. (Right, Anton) Ideally the most sensible place for a wind turbine is as the...
4 Pages(1000 words)Research Paper
ELECTRICAL POWER GENERATION SYSTEM
...Electrical power generation system s Submitted by s: Electrical power generation system Generation of Electricity is the method of electricity power production from the primary sources of energy. The central principles of generating electricity were all invented in the 1820 and also early in 1830 by Michael Faraday. His method of generating electricity is in use in the present. This method is on the principle that generation of electricity is as a result of loop of wire, or copper disc across the magnet poles. For the use of electric appliances, it is the sole method of delivering consumers electricity. The other related electricity storage, recovery, transmission and transmission by the use of load balancing... methods. These methods are...
4 Pages(1000 words)Assignment
ELECTRICAL POWER GENERATION SYSTEM
.... There are interconnections undersea through to the Republic of Ireland (EirGrid), Isle of Man (Isle of Man to England Interconnector), Northern Ireland (HVDC Moyle), the Netherlands (BritNed), and northern France (HVDC Cross-Channel). The paper will start with the different types of grid interfaces, protection issues and short circuit change levels. Then the paper will discuss the electrical power design of the components involved in generation of the electricity. Various types of grid interfaces In most cases, the low scale generators are indirectly connected to the grid. The characteristics of operation and the technology of...
4 Pages(1000 words)Assignment
Electrical Power Systems
... 3. Narrow band interference Background noise is independent of the mains cycle while the presence of the impulse noise is synchronous with the mains system of the network. 4. Determination of the power factor for linear and non-linear loads connected at distribution network Power factor is generally the percentage of the electricity that is being used to perform and accomplish some useful task. Power factor (PF)=Active power (Watts)/Apparent power (VA) The active power is measured in kilowatts while the apparent power generates magnetic fields that in return produce a flux that is necessary for the variation of induction devices. The lower power factor usually has a direct cost on the utility which serves as a major disadvantage... in the...
8 Pages(2000 words)Essay
Vessel electrical Distribution system
...complicated operational systems as extra precaution against accidents and that also needs effective management system, even employing well-tested computer software for electricity distribution and communication. Great example of modern large vessels are cruise ships, commercial and industrial ships and tankers, military ships, pipe layers, and drill, which have complicated electrical distribution systems with multiple generators, distribution boards, and significant essential services located throughout the vessel. The type of distribution system needs a power management system which is responsible for...
17 Pages(4250 words)Assignment
Ignition Systems and Electrical Theory (Aircraft Powerplants)
...Ignition Systems and Electrical Theory (Aircraft Power plants) Ignition Systems and Electrical Theory (Aircraft Power plants) The DCinput turbine engine ignition exciter provides a high intensity spark for ignition of the fuel and air combination at some point in engine start. Exciter refers to the generation of high voltage to produce a spark to ignite gases in gas turbine engines. Aircraft engines rely on an electrical ignition structure to generate a spark, which ultimately starts the engines ignition process. Although every DC input turbine engine ignition exciter has some basic elements but I had some trouble understanding the diverse types and the time the ignition systems job for each type is complete. Several parts... systems job is...
1 Pages(250 words)Essay
We use cookies to create the best experience for you. Keep on browsing if you are OK with that, or find out how to manage cookies.
Let us find you another Coursework on topic Aircraft Electrical Power Generation and Distribution for FREE!
+16312120006