What is Thyristor? – Thyristor Family and its Applications Thyristor is the general name given to a family of semiconductor devices having four layers with a control mechanism, although this term is most commonly applied to the SCR (silicon controlled rectifier). This term is derived from thyratron and transistor because the device combines the rectification […]
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Bus Interface in Microprocessor: Bus Interface in Microprocessor – A microcomputer consists of a set of components such as CPU, memory, I/O device and these components communicate with each other to perform a specified task. The collection of paths which connect the various devices or modules is called the interconnection structure. The design of the
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Electronics Engineering → Basics of Electronics Engineering Introduction to Electronics Engineering Electron Dynamics Electron Emission Electron Tubes Semiconductor Physics Theory of PN Junction Diodes Zener Diode Terminals Rectifiers BJT Transistor Hybrid Parameters Transistor Biasing and Stabilization FET Transistor Single Stage Transistor Amplifiers Amplifier Frequency Response Multistage Amplifiers Large Signal or Power Amplifiers Tuned Amplifier Feedback
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SF6 circuit breaker: One of the recent developments in the field of high voltage switchgear is the SF6 circuit breaker. In this a gas called sulphur hexafluoride is used as the medium of insulation and arc interruption. Basic Features of SF6 Breaker: SF6 is about 5 times heavier than air. It is chemically very stable,
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Differential Protection Relay in Power System: A Differential Protection Relay in Power System scheme compares quantities derived from the input and output currents of the protected circuit in such a manner that, for all healthy system and through fault conditions, the quantities balance and the protection is inoperative, while for internal fault conditions the balance
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Static Relays Basics and Classification: A Static Relays Basics refers to a relay in which the measurement or comparison of electrical quantities is done in a static network which is designed to give an output signal in the tripping direction when a threshold condition is passed. The output signal operates a tripping device which may
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Derivation of Single Phase Quantity from Three Phase System: It will be seen later that auxiliary channels or pilot wires are used to transmit information from one end of the line to the other end. For a normal three-phase system three pilots would ordinarily be required which would obviously be a very costly affair for
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Power Factor Improvement Methods: There are many drives which operate at a low power factor. Some of Power Factor Improvement Methods are: An induction motor direct on line. ac-dc diode rectifier and line commutated thyristor converter fed dc motor and variable frequency ac motor drives. ac regulator fed induction motor drives. Induction motor drive with
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Diesel Electric Traction System: Because of high initial cost, electric traction is justified only where there is sufficient volume of traffic. Diesel Electric Traction System is preferable where the traffic is limited. Boundary between these two alternatives depends on several factors such as initial cost, running cost, amount of traffic, maintenance etc. Diesel Electric Traction
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Braking System in Train: Braking System in Train has number of advantages over mechanical braking. It reduces wear and tear on rails and wheels, substantially increasing their life. It is smooth, fast and can be precisely and automatically controlled. On the other hand, mechanical brakes require frequent maintenance, particularly when subjected to heavy duty as
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