Induction motor fault detection, protection and speed. This paper specifically describes one of the methods. Due to its simple structure and reliable operation, ac induction motor has been applied widely in the industry, however it is difficult to control the speed for ac induction motor because of its multivariables coupling. The induction motor can run only at its rated speed when it is connected to the main supply. A complete study on the plc has imparted a fairly good idea about the industrial automation systems. Engineering chalmers university of technology abstract in this thesis. The control of induction motor by vfd and plc for the compacting. Pdf fault diagnosis of induction motor using plc semantic. Pdf this paper proposes an efficient speed control and power factor improvement of three phase induction motor using plc. This necessitates a speed control mechanism that is efficient and is also safe to use.
Matlab simulation for speed control of three phase. To control and monitor variable frequency drives using plc for. Induction motor fault detection, protection and speed control. Automation or automatic control is the use of various control systems for operating equipment such as machinery, processes in factories, boilers. The system also involves the use of a speed control system which can adjust the speed to desired value. Plc analog programming and speed control of ac motor using.
Also the knowledge about fault mode behavior of an induction motor drive system is extremely important from the standpoint of improved system design, protection, and fault tolerant control. The objective of our work is to monitor the speed of a three phase induction motor under various operating conditions. The experimental results are analyzed and it is found that the speed of the induction motor is controlled in normal. This paper is about speed control of induction motor which has very vast application in industrial sector using plc programmable logic controller and vfdvariable frequency drive. But the induction motors are designed to work at a. Variable speed control of 3phase ac induction motor digital control systems dcs group spru438 september 2000.
Tests of the induction motor system driven by inverter and controlled by plc prove a higher accuracy in speed. Most of the control systems have to make things move and that. A theoretical background for the induction motor input current variation due to variation in speed is presented and the theoretical result is compared with the experimental observations, when the motor speed is varied by variation of input voltage. The speed sensors attached to motor are used for detection of rotating. Ic 555 is the popular timer chip used to make timer circuits. Speed can be controlled by either simple or complex syste. The experimental results are analyzed and it is found that the speed of the induction motor is controlled in normal and step up, step down speed requirement is done smoothly using.
The circuit is used to control speed of dc motor by using pwm technique. Since in this scheme, the torque of both main and auxiliary motors are in the same direction, this method is called cumulatively cascaded. Finally based on different relative advantages and disadvantages comparison will be made among different types of speed control of induction motor as each type of. A six thyristor balaced ciruit is proposed for speed control and its performance is compared with that of sine wave variac voltage control.
This video explains the basics of analog io programming using rs logix 500 plc software with an example. In many applications single phase induction motor is in very wide use in. Software platform namely siemens ladder logic programming s7200 was comprehended, analyzed and implemented. What are the speed control method of induction motors the. Programmable logic controller is an industrial controlling device and is used to automate machines and factory assembly lines. Design of a plcbased variable load, speed control system. This paper proposes an efficient speed control and power factor improvement of three phase induction motor using plc. Design and implementation of plc based monitoring control.
For speed control of 3phase induction motor inverter m1x series. Mar 18, 2017 using these parameters we can easily detect faults such as overvoltage, overcurrent, overload, excessive heating, crawling and undervoltage. Check the rated current of your 3phase induction motor, and set the appropriate electronic thermal value. Pdf analysis of induction motor speed control using. Speed control of induction motor ac motor speed control. If stator drop is neglected, terminal voltage can be considered proportional to product of frequency and flux.
Plc is widely used in industrial control application. Plc program is used to control three motors as per the movement of weights of operation. Abstract the induction motor in industries as well as in residential purposes plays an. Therefore, the problem of induction motor protection attracted many researchers. Figure 2 illustrates another method for speed control. Design of 3 phase motor control system using plc with. The proposed system is a matlab simulink model, which is a closed loop model designed to achieve desired speed control of a threephase induction motor by varying its frequency. Speed control of induction motor using plc and scada. Plc, scada, automation, induction motor, speed control i. The induction motor can be isolated from the supply in case of any of the faults with relays. Speed control of induction motor by using inverter vfd.
Oct 01, 2019 speed control of dc shunt motor can be changed without any loss in its efficiency, but in case of induction motor speed, variations cause to decrees in its efficiency and power factor loss. Pdf in this article, a speed controller for dc motor is designed and illustrated using fuzzy logicbased programmable logic controller plc. Three ways to control a singlephase induction motor. What are the speed control method of induction motors. It can be shown that the synchronous speed of a motor is determined by the following formula. Induction motor speed is controlled either by changing the number of poles or by changing the supply frequency. In this application plc of allen bradley is used which communicate with vfd and in turn control the speed of induction motor. Cascade control method conclusionthe goal of this project was motivated to control speed of motor using plc siemens s7300, converter micro master 440, incremental rotary encoder instead of the encoder siemens because the incremental encoder is cheaper than encoder. Abstract plc is currently widely used as a control component in a large control. Speed control of induction motor using pi and pid controller. The efficiency of plc control is increased at high speeds up to 95% of the synchronous speed. Methods of speed control of induction motor electrical concepts. The control of induction motor by vfd and plc for the comp. Keywords computercontrolled systems, computerized monitoring, electric drives, induction motors, programmable logic controllers plc 1.
For the set up, the induction motors is used having the following ratings5hp, 440v, 6. Three phase induction motor speed control using frequency. This paper presents a simple and fast methodology for designing a linear induction motor lim. Abstract automation can be defined as the technology by which a process or way is performed without human succor. Series variable speed dc motor controller 12v uses a 555 timer ic as a pwm pulse generator to regulate the motor speed dc12 volt.
So obviously the speed of an induction motor can be controlled by varying. As there are different methods to control speed and starting current but here we are going to use resistance control method because of its advantages over other methods. Speed control of induction motor project mba mca projects. Using programmable logic controller plc with profibus cable and three sensors, the speed. A prototype of commercial conveyor belt system, controlled using programmable logic controller plc is proposed and the whole process is monitored using supervisory control and data acquisition scada.
Several conventional and numerical controller type intended for controlling ac motor speed at its executing various task pid controller, fuzzy logic controller or the. Microcontroller based speed control of induction motor. The micromaster420 drive is used to control the speed of motors. By using open loop vf control method, frequency can be varied from 5hz to 75hz but by using vfd, frequency can be varied upto 1500hz. It has high reliability and long life at low cost and compact. Wifi based speed control of three phase induction motor using plc and scada pipaliya chirag d1 pansuriya rahul r2 bhavani rahul r3 patel bharagav k4 prof. Journal of engineering research and application issn. Induction motor speed control using plc and scada irjet. There are various methods for speed control of induction motors. Design and implementation of plcbased monitoring control.
Pdf analysis of induction motor speed control using scada. Pdf design and plc implementation for speed control of. Alternating current drive, the compactlogix plc and the studio 5000 logix designer. Induction motor speed control methods electrical academia. Hence we will use this method to change the speed of induction motor. Due to this, an induction motor is sometimes referred to as an asynchronous machine synchronous speed.
Pdf implementation of motor speed control using pid. Induction motors are widely used in industry because of their rigidity and speed control flexibility. Pdf speed control of threephase induction motor based on v. Take the following precautions if using a builtin electronic thermal relay contained in the inverter. Pdf speed control of threephase induction motor based. Request pdf design of a plc based variable load, speed control system for a threephase induction motor industries make use of plcs to control bulk electronic devices and it is found that.
Controlling and protection of three phase induction motor using plc. The paper is about speed control of three phase induction motor using plc programmable logic controller through vfd variable frequency drive. Pdf automatic power factor and speed control of three phase. Programmable logic controller plc is a control system using electronic ope. For speed control of 3phase induction motor inverter m1x. The programmable logic controller can simultaneously evaluate data at a faster rate thus increasing the efficiency of the motor and resulting in its better performance. By implementing a monitoring and control system for the speed of motor, the induction motor can be used in high performance variable speed applications. In our paper we are using plc programmable logic controller for controlling and detecting the variation of current, voltage and temperature of induction motor.
Scalar control is the term used to describe a simpler form of motor control, using nonvectorcontrolled drive schemes. Single phase induction motor control, using the simple pwm technique, is possible. Induction motor speed and direction controller project serves this purpose of controlling the speed and direction of the induction motor. Our control system will be held using the available siemens plc. Pdf design and plc implementation for speed control of dc. In this research, it has been utilized with two input variables speed error and change of error for controlling the motor speed based on sugenostyle method. Pdf design and implementation of plcbased monitoring control. Abstract the implementation of a monitoring and control system for the induction motor based on programmable logic con.
Nov 15, 2011 induction motor speed control using fuzzy logic controller version 1. It has high reliability and long life at low cost and small size. Pdf speed control of three phase induction motor using plc. Induction motor speed control using fuzzy logic controller. Also the induction motor can be run in either of the two directions which is quite useful in many applications. The voltage induced in the stator is directly proportional to product of supply frequency and airgap flux. Recently, a speed control method of induction motor by vector control theory is applied to highly efficient industrial field.
The direct torque control of induction machine is based on the use of two hysteresis controllers8. Abstract automation is the process of handling various parameters of. The design of such expected control is possible through controller, plc, pla, fpga, etc. Implementation of plc in vfd controlled induction motor.
Pdf induction motor speed control using plc and scada. Motors come in a variety of forms, and the speed controllers motor drive output will be different dependent on these forms. An induction motor s speed enables affected by the supply frequency, change the. Speed control of three phase induction motors using powerflex 525. Apr 20, 2016 this project is designed to control the speed of a singlephase induction motor by using operating knob, which is commonly used in home automation applications. To control the speed of these motor, a motor drive and control system with different methods can be used. Abstract this paper presents a design and implementation of a. The speed controlling of ac motor is performed using plc technology by the at 89s52 microcontroller. This system provides the vfd controlling for induction motor speed control and energy saving. Parameter symbol value 1 supply frequency f 50 hz 2 voltage v 400 v 3 stator resistance r s 1. Pdf implementation of motor speed control using pid control. However, if we change the frequency alone then magnetizing flux between air gap of induction motor also changes.
Automatic power factor and speed control of three phase induction. Speed control of induction motor using embedded system. Plc method of control had replaced traditional control method which improves greatly dynamic control efficiency of motor. The induction motor can run only at its rated speed when it is connected to the main. Download project documentsynopsis induction motors have been used widely in different fields ranging from domestic appliances to industrial machinery. And step up, step down speed requirement is done smoothly using plc. Speed control of induction motor ac motor speed control methodsan induction motor is basically a constant speed motor, that means, for the entire loading r. Thus, plc proves themselves as a very versatile and effective tool in industrial control of electric drives. Design of a plcbased variable load, speed control system for. Speed control of threephase induction motor by stator. Three phase induction motor was fully automated using a plc. The micromaster420 drive is used to control the speed of motors and data acquisition. Control of induction motors by using programmable logic. Various control schemes have been used to operate the induction motor in speed and position control modes of operation using plc programming.
One common motor control system is the schrage motor, where the speed is altered by adjusting the brush positions for each phase. Introduction of pulse width modulation, speed control and. Controlling 3 phase induction motor using vfd and plc. For this reason, plc education has an important place in the content of universities and it is. In this instance, it is the kramer method for controlling the speed of a woundrotor induction motor.
Scada is used as a communication tool between the client, plc, and other control operations. Abstract the paper is about controlling the speed of a three phase induction motor using variable frequency drivevfd through programmable logic controller plc. The speed control of ac motor is performed using plc technology by the at 89s52 microcontroller. The speed of induction motor can be adjusted to great extent so as to provide easy control and high performance. Matlab simulation for speed control of three phase induction. Implementation of plc based star delta starter for starting. The process of project is such as a three phase supply is given to the machine. The synchronous speed of the induction motor is the speed at which stator rotating magnetic field rotates in the air gap of the machine. The hardware set up consists of vfd, conveyor conne.
Presentation ppt pptx pdf file pdf text file txt or view presentation slides online. Wifi based speed control of three phase induction motor. An induction motors rotor could be of two types, squirrelcage rotor slip ring or phase wound rotor there are generally two kinds of induction motor which rely upon the particular input supply, which are single phase induction motor three phase induction motor threephase induction motors are more commonly employed in adjustable speed drives. Ac induction motor speed control so what can we do to control the speed of an ac induction motor. In this study, the plc measures the voltage, the temperature, current and the speed of an induction motor through analog inputs. Plc based multi threephase induction motors motion controller. As we know almost every industry and in our homes, an induction motor is working so its speed control factor required in its many applications. Several conventional and numerical controller type intended for controlling ac motor speed at its executing various task pid. Several various techniques are implemented to control the speed of three phase induction motor, namely vf speed control, rotor resistance control, frequency control, and stator voltage control 6. Vf control in one direction makes the drive topology and control algorithm. Plc and scada based fault diagnosis of induction motor. Pdf speed control of three phase induction motor using.
553 1261 151 266 1483 419 1559 287 183 1300 618 1479 297 1320 472 358 981 694 56 1461 658 238 629 1572 363 1623 168 453 86 765 1346 729 1406 1134 997