Dams are crucial to a country's economy as they are means of power generation, irrigation, propagation of tourism, water conservation and other purposes. However, the unwarranted release of water from spillways of...
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ISBN:
(纸本)9781467398251
Dams are crucial to a country's economy as they are means of power generation, irrigation, propagation of tourism, water conservation and other purposes. However, the unwarranted release of water from spillways of these dams sometimes poses serious threat to human life. This was the case in the incident of June 2014 at the Larji Dam of Manali, India wherein 24 people lost their lives because of sudden, unannounced opening of the spillways. It is therefore essential to implement an automated control of floodgates that takes into consideration the presence of human beings and is also used for purposes like power generation and irrigation. This paper aims to provide a simulated proposal of these automated floodgates using the AC500PM554 PLC. The proposed system may be implemented on upcoming dams of variable sizes and capacities.
A Programmable Logic Controller (PLC) is a specialized computer like device used in industrial process control, replacing banks of electromagnetic relays. Here, the speed of a Permanent Magnet Direct Current (PMDC) mo...
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ISBN:
(纸本)9781538643198
A Programmable Logic Controller (PLC) is a specialized computer like device used in industrial process control, replacing banks of electromagnetic relays. Here, the speed of a Permanent Magnet Direct Current (PMDC) motor is controlled under load condition by a PID Controller simulated in the PLC Platform using the Siemens step S7 software. The PLC used is Siemens CPU224XPsi. The reason behind the PID to be implemented in the PLC program is for the system to have a better response and less error. The loading on the PMDC motor is through eddy current braking. As the loading on the motor cannot be quantified, observations were made for specific loading positions. The performance of the motor was examined under three conditions- (i) Motor without feedback and without controller, (ii) Motor with feedback without controller and (iii) Motor with feedback and controller. The performance of a PMDC motor was also studied through actual hardware implementation. Here a Peripheral Interface Controller (PIC) Microcontroller is used to integrate a number of functions like optical method of measurement and display of speed of the motor, feedback and implementation of the PID controller. The transistor-based motor drive is activated by variable Pulse Width Modulation (PWM) output from the microcontroller.
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