1. The document discusses DC machines and their components. It describes how a DC machine contains a stator and rotor.
2. The commutator is described as a mechanical rectifier that converts the alternating voltage generated in the armature winding into direct voltage across the brushes.
3. The brushes provide an electrical connection between the rotating commutator and the stationary external load circuit.
Winding
What is Armature winding?
Terms related to armature winding.
Single layer and double layer windings.
Comparison between closed and open windings.
Types of DC armature winding.
Types of AC armature winding.
Winding
What is Armature winding?
Terms related to armature winding.
Single layer and double layer windings.
Comparison between closed and open windings.
Types of DC armature winding.
Types of AC armature winding.
Inverter is a device that converts direct current (DC) into alternating current (AC) and supplies AC power from DC sources such as solar panels or batteries. It is used in a wide range of applications such as switching power supplies in computers, electric utility high-voltage direct current applications etc.
We corporate Services is Deal with verius Inverter Brands in India Like APC,Microtek, Exide, Luminous, Fuji Inverter, Kevin, Su-Kam, Mitsubishi, Mahindra, nexus inverter, Lucas,Videocon.
We will also deal in Brands of Solar Inverter Like Delta Solar Inverter,Danfoss Solar Inverter, SMA Solar Inverter and Duracell Car Inverter
It is very useful for Electrical &Electronics and Electronics and Communication Engineering Students. Here explained the all types of Electrical and Electronics instruments with relevant diagram and Equations
Industrial Training at Shahjalal Fertilizer Company Limited (SFCL)MdTanvirMahtab2
This presentation is about the working procedure of Shahjalal Fertilizer Company Limited (SFCL). A Govt. owned Company of Bangladesh Chemical Industries Corporation under Ministry of Industries.
Quality defects in TMT Bars, Possible causes and Potential Solutions.PrashantGoswami42
Maintaining high-quality standards in the production of TMT bars is crucial for ensuring structural integrity in construction. Addressing common defects through careful monitoring, standardized processes, and advanced technology can significantly improve the quality of TMT bars. Continuous training and adherence to quality control measures will also play a pivotal role in minimizing these defects.
TECHNICAL TRAINING MANUAL GENERAL FAMILIARIZATION COURSEDuvanRamosGarzon1
AIRCRAFT GENERAL
The Single Aisle is the most advanced family aircraft in service today, with fly-by-wire flight controls.
The A318, A319, A320 and A321 are twin-engine subsonic medium range aircraft.
The family offers a choice of engines
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
Automobile Management System Project Report.pdfKamal Acharya
The proposed project is developed to manage the automobile in the automobile dealer company. The main module in this project is login, automobile management, customer management, sales, complaints and reports. The first module is the login. The automobile showroom owner should login to the project for usage. The username and password are verified and if it is correct, next form opens. If the username and password are not correct, it shows the error message.
When a customer search for a automobile, if the automobile is available, they will be taken to a page that shows the details of the automobile including automobile name, automobile ID, quantity, price etc. “Automobile Management System” is useful for maintaining automobiles, customers effectively and hence helps for establishing good relation between customer and automobile organization. It contains various customized modules for effectively maintaining automobiles and stock information accurately and safely.
When the automobile is sold to the customer, stock will be reduced automatically. When a new purchase is made, stock will be increased automatically. While selecting automobiles for sale, the proposed software will automatically check for total number of available stock of that particular item, if the total stock of that particular item is less than 5, software will notify the user to purchase the particular item.
Also when the user tries to sale items which are not in stock, the system will prompt the user that the stock is not enough. Customers of this system can search for a automobile; can purchase a automobile easily by selecting fast. On the other hand the stock of automobiles can be maintained perfectly by the automobile shop manager overcoming the drawbacks of existing system.
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About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Courier management system project report.pdfKamal Acharya
It is now-a-days very important for the people to send or receive articles like imported furniture, electronic items, gifts, business goods and the like. People depend vastly on different transport systems which mostly use the manual way of receiving and delivering the articles. There is no way to track the articles till they are received and there is no way to let the customer know what happened in transit, once he booked some articles. In such a situation, we need a system which completely computerizes the cargo activities including time to time tracking of the articles sent. This need is fulfilled by Courier Management System software which is online software for the cargo management people that enables them to receive the goods from a source and send them to a required destination and track their status from time to time.
Overview of the fundamental roles in Hydropower generation and the components involved in wider Electrical Engineering.
This paper presents the design and construction of hydroelectric dams from the hydrologist’s survey of the valley before construction, all aspects and involved disciplines, fluid dynamics, structural engineering, generation and mains frequency regulation to the very transmission of power through the network in the United Kingdom.
Author: Robbie Edward Sayers
Collaborators and co editors: Charlie Sims and Connor Healey.
(C) 2024 Robbie E. Sayers
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
Explore the innovative world of trenchless pipe repair with our comprehensive guide, "The Benefits and Techniques of Trenchless Pipe Repair." This document delves into the modern methods of repairing underground pipes without the need for extensive excavation, highlighting the numerous advantages and the latest techniques used in the industry.
Learn about the cost savings, reduced environmental impact, and minimal disruption associated with trenchless technology. Discover detailed explanations of popular techniques such as pipe bursting, cured-in-place pipe (CIPP) lining, and directional drilling. Understand how these methods can be applied to various types of infrastructure, from residential plumbing to large-scale municipal systems.
Ideal for homeowners, contractors, engineers, and anyone interested in modern plumbing solutions, this guide provides valuable insights into why trenchless pipe repair is becoming the preferred choice for pipe rehabilitation. Stay informed about the latest advancements and best practices in the field.
Vaccine management system project report documentation..pdfKamal Acharya
The Division of Vaccine and Immunization is facing increasing difficulty monitoring vaccines and other commodities distribution once they have been distributed from the national stores. With the introduction of new vaccines, more challenges have been anticipated with this additions posing serious threat to the already over strained vaccine supply chain system in Kenya.
5. Wednesday, January 27, 2016 Ch. 14 Alternators and Synchronous Motors 5
Electro-mechanical Energy-conversion
(EMEC) Machines
Next
6. Wednesday, January 27, 2016 Ch. 14 Alternators and Synchronous Motors 6
AC and DC
Generators and Motors
• When the electrical system is characterized by direct
current, the machines are called dc motors and dc
generators.
• Similarly, if the electrical system is characterized by
alternating current, the machines are called ac motors
and ac generators.
• Basically, the ac machines are not different from the dc
machines.
Next
7. Wednesday, January 27, 2016 Ch. 14 Alternators and Synchronous Motors 7
Electrical Rotary Machine
• It has two parts :
(1) the fixed part, called the stator, and
(2) the moving part, called the rotor.
Next
8. Wednesday, January 27, 2016 Ch. 14 Alternators and Synchronous Motors 8
Generator Action
• Whenever the conductors of a coil cut across the
magnetic flux (or are cut by it), an emf e is induced in
it.
• This emf can supply a current i to an electrical load.
• Thus, an electrical power ei is generated.
• This is the Generator Action.
Next
9. Wednesday, January 27, 2016 Ch. 14 Alternators and Synchronous Motors 9
Motor Action
• Whenever current-carrying conductors of a coil are
placed (perpendicularly) in a magnetic flux, a force is
experienced by each conductor.
• This gives rise to an electromagnetic torque e.
• This torque can rotate a mechanical load at an angular
speed ω.
• Thus, a mechanical power e ω is generated.
• This is the motor action.
Next
10. Wednesday, January 27, 2016 Ch. 14 Alternators and Synchronous Motors 10
Power Considerations for a Generator
Large-size generators are usually called
alternators.
Next
11. Wednesday, January 27, 2016 Ch. 16 DC Machines 11
Importance
• DC machines were the first electrical machines invented.
• It is still the best motor to drive trains and cranes.
• Because semiconductor rectifiers can easily convert ac into dc, dc
generators are not needed.
• Even in the automobiles, the dc generator has been replaced by
the alternator plus diodes for rectification.
• Portable devices powered by batteries require dc motors, such as
portable tape players, walkman, window-lifters, etc.
• The dc motor is readily controlled in speed and torque and hence
is useful for control systems.
Next
13. Wednesday, January 27, 2016 Ch. 16 DC Machines 13
Construction
• The main parts of a DC machine are
– Yoke
– Poles, pole shoes.
– Field Coils.
– Armature.
– Commutator.
– Brushes.
Next
14. Wednesday, January 27, 2016 Ch. 16 DC Machines 14
YOKE
• Gives mechanical support for poles
• Protects whole machine as a protecting cover
• Provides path for the circulation of magnetic flux
• Small generators – cast iron
• Large machines – cast steel
Next
15. Wednesday, January 27, 2016 Ch. 16 DC Machines 15
Pole cores & Pole shoes
• Field magnets has two parts
– Pole cores
– Pole shoes
• Pole shoes: spread out the flux in the air gap & reduce the reluctance
– Support the exciting coils
• Pole cores: solid piece made of cast iron & cast steel
• Pole shoes are laminated to the pole face by screws.
Next
16. Wednesday, January 27, 2016 Ch. 16 DC Machines 16
Field Winding
• Function : To carry current due to which pole core behaves as an
ELECTROMAGNET, producing necessary flux.
• It helps in producing magnetic flux.
• Field winding is divided into various coils called field coils. These are
connected in series with each other and wound in such a direction that an
alternated ‘N’ and ‘S’ poles are created.
Next
17. Wednesday, January 27, 2016 Ch. 16 DC Machines 17
Two Types of Winding
(1) Lap Winding : The sides of the successive coils
overlap each other.
(2) Wave Winding : One side of a coil under one
pole is connected to the other side of a coil
which occupies approximately the same
position under the next pole.
Next
18. Wednesday, January 27, 2016 Ch. 16 DC Machines 18
Lap Winding:
Wave Winding:
Armature winding
1
3
2
4
5
Next
19. Wednesday, January 27, 2016 Ch. 16 DC Machines 19
(a) Lap winding. (b) Wave winding.
(for lap winding)
2 (for wave winding)
A P
A
Next
22. Example of a commutator…
• Function :Commutator
A commutator is a mechanical rectifier which converts the
alternating voltage generated in the armature winding
into direct voltage across the brushes. The commutator is
made of copper segments insulated from each other by
micasheets and mounted on the shaft of the machine .The
armature conductors are soldered to the commutator
segments in a suitable manner to give rise to the armature
winding. Depending upon the manner in which the
armature conductors are connected to the commutator
segments, there are two types of armature winding in a
d.c. machine viz., (a) lap winding (b) wave winding. Great
care is taken in building the commutator because any
eccentricity will cause the brushes to bounce, producing
unacceptable sparking. The sparks may bum the brushes
and overheat and carbonise the commutator.
23. Example of a commutator…
• Function :Brushes
The purpose of brushes is to ensure electrical
connections between the rotating
commutator and stationary external load
circuit. The brushes are made of carbon
and rest on the commutator.
The brush pressure is adjusted by means of
adjustable springs . If the brush pressure is
very large, the friction produces heating of the
commutator and the brushes. On the other
hand, if it is too weak, the imperfect contact
with the commutator may produce sparking.