Knowledge in Electricals
electrical machine - 2
The induction machine was invented by NIKOLA TESLA in 1888. Right from its inception its ease of manufacture and its robustness have made it a very strong candidate for electromechanical energy conversion. It is available from fractional horsepower ratings to megawatt levels. It finds very wide usage in all various application areas. The induction machine is an AC electromechanical energy conversion device. The machine interfaces with the external world through two connections (ports) one mechanical and one electrical. The mechanical port is in the form of a rotating shaft and the electrical port is in the form of terminals where AC supply is connected. There are machines available to operate from three phase or single phase electrical input. In this module we will be discussing the three phase induction machine. Single phase machines are restricted to small power levels.
Shantha Kumar . V
electrical machine - 2 -2
The induction machine was invented by NIKOLA TESLA in 1888. Right from its inception its ease of manufacture and its robustness have made it a very strong candidate for electromechanical energy conversion. It is available from fractional horsepower ratings to megawatt levels. It finds very wide usage in all various application areas. The induction machine is an AC electromechanical energy conversion device. The machine interfaces with the external world through two connections (ports) one mechanical and one electrical. The mechanical port is in the form of a rotating shaft and the electrical port is in the form of terminals where AC supply is connected. There are machines available to operate from three phase or single phase electrical input. In this module we will be discussing the three phase induction machine. Single phase machines are restricted to small power levels.
electrical machine -1 - part 2
Electromechanical Energy conversion, forces and torque in magnetic field systems – energy balance, energy and force in a singly excited magnetic field system, determination of magnetic force , coenergy, multi excited magnetic field systems. DC Generators – Principle of operation, Action of commutator, constructional features, armature windings, lap and wave windings, simplex and multiplex windings, use of laminated armature, E. M.F. Equation, Methods of Excitation: separately excited and self excited generators, build up of E.M.F., critical field resistance and critical speed , causes for failure to self excite and remedial measures, Armature reaction: Cross magnetizing and demagnetizing AT/pole, compensating winding, commutation, reactance voltage, methods of improving commutation Load characteristics of shunt, series and compound generators, parallel operation of DC generators, use of equalizer bar and cross connection of field windings, load sharing. MODULE-II (10 HOURS) Transformers: Single phase transformer, Constructional details, Core, windings, Insulation, principle of operation, emf equation, magnetising current and core losses, no load and on load operation, Phasor diagram, equivalent circuit, losses and efficiency, condition for maximum efficiency, voltage regulation, approximate expression for voltage regulation, open circuit and short circuit tests, Sumpner’s test, Inrush of switching currents, harmonics in single phase transformers, magnetizing current wave form, Parallel operation of transformers. MODULE-III (10 HOURS) DC Motors: Principle of operation, Back E.M.F., Torque equation, characteristics and application of shunt, series and compound motors, Armature reaction and commutation, Starting of DC motor, Principle of operation of 3 point and 4 point starters, drum controller, Constant & Variable losses, calculation of efficiency, condition for maximum efficiency.
Basic electricity Principles
the pdf contaiins basic information about different electricity principles and there practical uses in the electrical machines to furtger analyze it
Shivansh Nigam
THREE PHASE AC CIRCUITS
Three-phase electric power is a common method of alternating current electric power generation, transmission, and distribution. It is a type of polyphase system and is the most common method used by electrical grids worldwide to transfer power.
Arya Sunil
Introduction to Godown Wiring
This clip provides details on how to execute Godown wiring.The material will be useful for both students and for general knowledge.
Aravind Roy
One lamp controlled by one switch
This clip provide details about One lamp controlled by one switch.The material will be useful for both students and for general knowledge.
One lamp controlled by one switch (3 pin socket)
This clip provides details about one lamp controlled by one switch using 3 pin socket.The material will be useful for both students and for general knowledge.
Introduction to Parallel Switch Command
This clip provides you details about Parallel switch Command.The material will be useful for both students and for general knowledge.
Two lamps controlled by One Switch
This clip provides you details about two lamps controlled by one switch.The material will be useful for both students and for general knowledge.
ENERGY METER
WE WILL KNOW ABOUT THE ELECTRICAL INSTRUMENTS OF ENERGY METER
H. R. Mahesh Reddy
Transformers and its description
This is the handwritten notes prepared by experienced faculty for a better understanding of the students
Vishnu Vardan