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Speed control of motors (ac motors as well as dc motors) can be accomplished by using solid-state...

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Electrical Engineering

Speed control of motors (ac motors as well as dcmotors) can be accomplished by
using solid-state switching circuitry In one such method, asolid-state relay is activated
using a switching signal generated by a microcomputer so as to turnon and off at high
speed, the power into the motor drive circuit. Speed of the motorcan be measured using a
sensor such as tachometer or optical encoder. This signal is readby the microcomputer
and is used to modify the switching signal so as to correct themotor speed. Using a
schematic diagram, describe the hardware needed to implement thiscontrol scheme.
Explain the operation of the control system.

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