International Research Journal of Engineering and Technology (IRJET) Volume: 04 Issue: 04 | Apr -2017
www.irjet.net
e-ISSN: 2395 -0056 p-ISSN: 2395-0072
Induction Motor Control by Stator Voltage Control Method using PLC: A Review Priyanka D. Dukare1, P.P. Jagtap2, 1Student, 2Assoc.
Department of Electrical Engineering, GHRCE, Nagpur, India
Professor, Department of Electrical Engineering, GHRCE, Nagpur, India
---------------------------------------------------------------------***--------------------------------------------------------------------Abstract—The application of programmable logic controller (PLC) for controlling the operation of induction motor such as forward and reverse direction and speed is proposed in this paper. To run the motor on desired speed a program will be prepared in the PLC which will provide the gating signal to the driver circuit which will control the motor speed and its position according to the command given. Key words—PLC, induction motor, FBD, I/O modules. 1. INTRODUCTION Today there are number of manufacturing and process industries where the motors and electrical drives plays important role in carrying out different process operations such as in textile industries, food processing industries, glass industries, cement industries etc. The most commonly used motor in industries is an induction motor because of its simplicity and ruggedness. Hence controlling and cocoordinating the motor operation with other process elements is important in industrial control system. Here the PLC (programmable Logic Controller) plays an important role due to its powerful functions, resistant to strong interferences, high reliability and ease of operation. PLC has an advantage of high control speed and high flexibility and can efficiently work in harsh industrial environments that contain relatively high levels of electromagnetic interferences (EMI), contaminations and vibrations. It efficiently involves the capability of motion control. Today, the need of automation in the industrial processes has caused mass production in reduced time frame with less human error and increased safety which has led to the increasing use of PLC based automation system because of the benefits as stated above. Also the variable speed application of an induction motor with the help of AC drives by using controller like PLC improves control of a process, saves energy utilization, decrease wear and tear on the machinery and additionally it improves the power factor.
Š 2017, IRJET
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Impact Factor value: 5.181
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Few papers studies have shown [1] a three phase induction motor drives a dc generator supplying variable load. The IM is fed by a rectifier and PWM inverter which is controlled by the PLC based controller. A closed loop control system for constant speed operation is developed with speed feedback and load current feedback. The operation is also tested for open loop condition by inactivating the PLC. The IGBT based inverter is used. A tachogenerator is used for speed sensing. The system is tested for varying load conditions and trip situations. [2]A multi drive system and SCADA is implemented for monitoring the position, speed and torque control. Communication between the field devices and the PLC has been achieved through the Profibus-DP protocol data bus. The induction motor is fed with a Vector Control Drive. And the servo motor is fed with PWM based ac drive. The performance is verified under the no-load and load condition of both the motors. [3]A PLC based control system for the speed, position and torque control of the PMSM is designed and its interface with the SCADA system for real time monitoring and control is implemented. The development of HMI (Human Machine interface) provides real time touch to the virtual process. RS-232 serial communication interface is used to connect drives with the PLC which uses Profibus-DP protocol to communicate with PLC and Modbus protocol to communicate with operator console. The system has been tested for different position and speeds of the motor. [4] The operation of the IM is controlled with the PLC by using PID control technique. A linear V/f characteristic is used to control the motor. For remote monitoring and control an OPC server is used in client/server mode of communication. OPC is a software interface standard that allows Windows program to communicate with industrial hardware devices. The motor speed response and network time delay was monitored. [5]A Programmable Logic Controller is used for controlling the speed of IM and ram position of Hydraulic Press machine. The IM was fed with the VFD. The use of PLC has eliminated the need of ADC card and Programmable Integrated Circuit (PIC) which provided them with better efficiency in its operational cycle. The high and low voltage protection is provided for HP machine during starting and under operating conditions as the machine is fed with a VFD. The ISO 9001:2008 Certified Journal
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