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Articles on Trending Technologies
Technical articles with clear explanations and examples
Negative Booster in Electric Traction
A negative booster is a separately excited DC generator whose armature is connected with negative bus-bar at the far end of the track through negative feeder. The connection diagram of the negative booster is shown in the figure below.As in case of DC traction system, the return current flows through the rails to the substations. Because of this current flow through the rails, some voltage drop exists along the track. Due to potential difference along the track, some of the return currents leak out to the earth and follow the path of low resistance provided by water pipes, gas pipes, ...
Read MoreFactors Affecting the Schedule Speed of an Electric Train
Schedule Speed of an Electric TrainThe schedule speed of an electric train is defined as the ratio of the distance covered between two stops to the actual time of the run including the time for stop. The schedule speed is denoted by VS and is given by, $$\mathrm{\mathrm{Schedule\: speed}, \mathit{V_{\mathit{S}}}\:=\:\frac{\mathrm{Distance \:between\: two\: stops(\mathit{D})}}{Actual\: run\: time(\mathit{T_{\mathrm{run}}})\:+\:Time \:for\: stop(\mathit{T_{\mathrm{stop}}})}\:\:\:\cdot \cdot \cdot \mathrm{\left ( \mathrm{1} \right )}}$$$$\mathrm{\therefore \mathrm{Schedule\: speed}, \mathit{V_{\mathit{S}}}\:=\:\frac{\mathrm{Distance \:between\: two\: stops(\mathit{D})}}{Schedule\: time (\mathit{T_{S}})}\:\:\:\cdot \cdot \cdot \mathrm{\left ( \mathrm{2} \right )}}$$Where, TS is the schedule time in hours.Factors Affecting the Schedule SpeedThe factors that affect the schedule speed of an electric train ...
Read MoreTypes of Motor Enclosures and Their Applications
The part of an electric motor that protects the motor from the contaminants in the environment in which it is operating and persons being from touch is called the motor enclosure.The motor enclosures are necessary for the following reasons −It protects the motor against foreign body and severe conditions.It protects the inner parts of the motor.It protects the operating personal from live parts of the motor such as winding terminals, slip rings, brushes, etc.Types of Motor EnclosuresIndian Standards (IS) 4691 have described codes for different types of enclosures. The most common types of electric motor enclosures are given as follows ...
Read MoreTypes of Electric Motors Used in Industrial Electric Drives
Electric motor drives are the basic assemblies used for the transformation of electrical power into mechanical energy. In simple words, the term "electric motor drive" is used to denote drives driven by electric motors.Types of Motors Used for Electric DrivesFollowing are the different types of motors used for industrial electric drives −DC series motorDC shunt motorCumulative compound DC motorSlip ring induction motorSquirrel cage induction motorDouble squirrel cage induction motorThree phase synchronous motorSingle-phase synchronous motorSingle-phase AC series motorRepulsion motorCapacitor-start induction-run motorCapacitor-start capacitor-run motorNow let's check in detail the applications of each of these motors.DC Shunt MotorDC shunt motor has medium starting ...
Read MoreTips for Students to Ace any Competitive Examination
A few days ago, I happened to read a humorous infographic in one of the reputed newspapers. clearly, the beloved cartoonist of the newspaper was trying to take a dig at the extremely competitive world. The infographic read Time will pass. Will you? This brought some smiles on my face and soon, I found myself lost in a whirlpool of emotions where my mind profoundly pondered and wandered into the nitty-gritty of examinations.Let me express this modicum of truth – Students generally hesitate to confront the glare of examination results. Despite learning and understanding various new concepts, despite toiling and ...
Read MoreHow do AC locomotives work?
Block Diagram of an AC LocomotiveThe following figure shows the block diagram of an AC locomotive.AC Locomotive - Function of Each PartThe working and function of each part of an AC locomotive is described below −The AC power at 25 kV is taken from the overhead conductor wire (called as catenary) through a pantograph and this high voltage supply is fed to a step–down transformer (provided with on load tap changer) installed in the locomotive itself, which converts the high voltage AC supply to low voltage AC supply.This low voltage AC supply obtained from the transformer is then converted into ...
Read MoreTips and Tricks to Drive Traffic to a Landing Page
In this digital world, most of the business enterprises nowadays are aware of the importance of online presence and they are able to see the benefits of branding in digital format. The first thing in their mind is to develop a web portal. However, few entrepreneurs may not be technically aware that, the landing page is one of the most important aspects to look for. It is better to be aware of these basics before entering the online world.The landing page is a distinct page built for the sole objective of conversion. It is designed, written and developed to meet ...
Read MoreWhy do doctors wear White & Lawyers black?
Doctors wear White coats because they signify health and hygiene. White is desirable because they show the stains and perhaps indicates when you need to change clothes as soon as they are stained. Frequent changing gives a better outcome for the patient. This will ensure that Doctors maintain a clean and sterile environment all the time.Wearing black robes by Lawyers and Judges dates back to 17th Century British practice. The black color is perceived as a symbol of dignity, honor, wisdom, and justice. As Lawyers and Judges have to keep up these values and maintain grace and dignity black is prescribed ...
Read MoreCan I learn Java without any coding background?
After you’ve learned the basics of computer science, you’ll be ready to learn a programming language. Java is a high-level object-oriented programming language which is platform independent and can be run on any mobile, web or desktop applications.Theoretically, it is true that with hard work, effort and right direction one can become an expert in Java programming. But practically it would help if you know one or two core programming languages to understand the jargon easily. Learning the basics of computer science will not be enough. If you have prior knowledge of C language and the concepts, learning Java becomes easier.Java ...
Read MoreThe WhatsApp's Two-step Verification
If I ask you what are the basic necessities of life, you would answer food, clothing shelter with internet and a smartphone of course. No, we are not discussing about internet but a reason why we desperately want internet, yes that’s right, for WhatsApp. WhatsApp is a must have app these days for every smartphone owner.WhatsApp is the most popular and widely used messaging app. It is impossible to talk about WhatsApp and not include the privacy and security part in it. We use lots of measures to maintain our privacy, like pattern lock, password protection, archive the chats etc. ...
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