Open loop system
Explain Open loop system and close loop system?
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An open loop system utilizes a controller or a control actuator to obtain the desired response as shown in fig. An open loop system operates without a feedback.eg-if a gas fire is turned in a room, the temperature may climb up to 20deg c, it will remain at that value unless there is disturbance, such disturbance may cause by leaving a door open.
Block diagram of an open loop system
The close loop system is one in which control action is somehow depend on the output. Thus the actuating signal is the difference of desired output and reference point. This system operates with feedback.eg-an air condition room or unit.
Block diagram of close loop control system
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A step-down transformer that operating from a 50Hz mains supply of 220 Volt rms, is used to give a decrease voltage to a secondary power supply. The final delivers 400 Watt of power to a load consisting of an equivalent resistance of 10?. The transformer should have a
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