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Q. Digital controller for a steam-turbine driven generator?
Figure illustrates the basic elements of a minicomputer system in terms of a block diagram for speed and voltage control (as well as data acquisition) of a turbine-generator unit. Typical output variables of the generator are speed, rotor angle, terminal voltage, field (excitation) current, armature current, and real and reactive power. Some output variables are measured by digital transducers, whose outputs are then digitally multiplexed and sent back to the minicomputer.
Some other output variablesmay bemeasured by analog transducers,whose outputs are processed through an analogmultiplexer which performs a time-divisionmultiplexing operation. The output of the analog multiplexer is connected to a sample-and-hold device, which samples the output of the multiplexer at a fixed time interval and then holds the signal level at its output until the A/D converter performs the analog-to-digital conversion. Thus, following the multiplexer, time sharing is done amid a number of signal channels.
Problem: The current voltage characteristic [ ID versus VD] of a semiconductor diode for VD > 0 [forward bias] is given in Figure Under reverse bias conditions [VD Fi
block diagram of digital control system and explain each block
What is the maximum memory size that can be addressed by 8086? In 8086, an memory location is addressed by 20 bit address and the address bus is 20 bit address and the address
How to do?
to design wheatstone bridge
Q. For the configurations of the coupled coils shown in Figure, obtain the voltage equations for v 1 and v 2 .
Explain indirect data addressing mode (with examples) available in microprocessors. Indirect Mode: Address given in instruction includes address where the operand resi
Q. DC Motor Characteristics? We gain an understanding of the speed-torque characteristics of a dc motor from Equations. In shunt motors, the field current can be simply control
An electric heater element is made of Nichrome wire having resistivity equal to 100 ×10 -8 ohm-metre. The diameter of the wire is 0.3 mm. Calculate the length of the w
Q. What is centralized SPC? In centralized control, all control equipment is replaced by a single processor which should be quite powerful. It should be capable of processing 1
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