Their sturdy and reliable design, together with good motor protection for a long service life, is a guarantee of quick and easy. Oct 11, 2014 hello friends, i am posting version3 project of single phase induction motor direction control. Presented here is a robust system for switching onoff, varying the speed and direction of rotation of an industrial 3 phase induction motor using vfd and plc. The torque developed in this method is proportional to the square of the supply voltage. Abstract automation can be defined as the technology by which a.
The objective of this paper is to study and learn how to connect the three. Induction motors installation operation generators. The ac speed control motor unit that uses the most popular singlephase capacitorrun induction motor, the small and highly efficient brushless dc motor unit, and the inverter unit that combines a threephase induction motor with a small inverter. Motor speed control using vfd and plc programming ladder logic. Plc analog programming and speed control of ac motor using. This motor control application can also be accomplished with a plc. The variable speed drives which can control the speed of acdc motors are indispensable. Industries make use of plcs to control bulk electronic devices and it is found that combining them with motor drives such as vfds, the efficiency of induction. Jun 06, 2016 speed control of induction motor using plc and vfd 1. Pdf ethernet control ac motor via plc using labview. Vf speed control of three phase induction motor by using plc. Instead of connecting many vfds to the main controller, usually a plc, and synchronizing their operation. In this study, the plc measures the current, the voltage, the temperature, and the speed of an induction motor through analog inputs.
The synchronous speed and therefore, the speed of the motor can be controlled by varying the supply frequency. From the figure above, the block diagram configurations can be obtained from this set up. Controller plcs units in size, cost and kinds but similar in the. In this article, a speed controller for dc motor is designed and illustrated using fuzzy logicbased programmable logic controller plc. Implementation of plc in vfd controlled induction motor. Refer to the motor manufacturers data on the motor for wiring diagrams on standard frame ex e, ex d etc. Deltas ac motor drives are able to efficiently control motor speed, improve. The basic structure of the plc is illustrated in fig. Various induction motor speed control methods advantages. Three phase induction motor are widely used motor in industry because of its rugged construction and negligible maintenance. An induction motor or asynchronous motor is an ac electric motor in which the electric current in the rotor needed to produce torque is obtained by electromagnetic induction from the magnetic field of the stator winding. It also illustrates the usage of dedicated motor control libraries that are included in the sdk.
In todays world industries demand process automation in all sectors, because automation results in better quality, increased production and reduced costs. The 208v 3ph 4 wire 400a panel features a plc based control system with backup floats and stand alone three pump controller and intrinisically safe barriers for level. Induction motors are widely used in industry because of their rigidity and speedcontrol flexibility. The drive technology configurator dt configurator supports you when selecting the optimum electric motor for your application including the applicable options and the matching converter. Basic plc program for control of a threephase ac motor for beginners on photo. However, the abbreviation has been changed to plc in order to avoid misunderstanding the programmable logic controller as a personal computer. In the reference 389 ac chopper are used to obtain variable rms voltage from fixed voltage and frequency sources. An induction motor can therefore be made without electrical connections to the rotor. The combination of plc and vfd provides an efficient approach for getting a motor with continuous running. They offer the potential for major savings in many areas of application. A closedloop control system for constant speed operation, configured with speed feedback. Hi speed contactor overload overload lo speed contactor these diagrams are current at the time of publication, check the wiring diagram supplied with the motor. Single phase induction motor direction control using plc v3. Speed control of induction motor by variable frequency control variable frequency control is a method which is used to control the speed of an induction motor.
The speed of a threephase induction motor driving a given load is determined by matching the torque speed characteristics of the motor and load, as shown in fig. The synchronous speed of an induction motor is given by the relation shown below. The different methods of speed control of induction motor can be broadly classified in to scalar and vector control methods. These techniques depend on varying the stator ac voltage to control the speed of threephase induction motor.
Plc, scada, automation, induction motor, speed control i. By using pwm strategies, in the reference 45 inverter is used to drive the speed of induction motor, ac choppers are used in the reference67 for the speed control of induction motor. This control system will be held using the available siemens plc. Control system design the pid controller is designed to control motor speed based on incoming information of system and auto tuning and its parameters have been tuned for receiving best stability and overshoot and settling time.
Speed control of induction motor 7 ways to control. In case of three phase ac operation, most widely used motor is. Ac motor speed control with plc using step7 microwin part1. Jul 10, 2010 plc software must therefore be maintainable and extensible. Journal of engineering research and application issn. Depending on you application whether its a speed control or position control or both you can find a ton of information online concerning trapezoidal position control. This process control will be performed in interactive training system of plc in real time 3d environment 3d cameras, 3d sound, 3d view using 16 io plc via daq card advantech usb. From the equation 1 it is clear that the motor speed can be changed by a change in frequency f, a number of poles p, and slip s. In this study, the plc measures the current, the voltage, the temperature, and the speed of.
Induction motors are widely used in industry because of their rigidity and speed control flexibility. In addition, we will monitor motor parameters via scada system. The use of inverter for tests on induction motor by the control of plc provides good accuracy and speed regulation comparing the conventional vf. High power three phase motor control using plc siemens s 7300. Speed control of single phase induction motor using ac. The configurator directly transfers the data of the selected motor into the siemens industry mall shopping cart. The plc has to give set point for vfd drive to control the motor speed, this can achieved either automatically from the plc or by the operator action from the hmi. This manual is intended to help users of variable speed drives successfully install. Induction motor control is complex due to its nonlinear characteristics.
An induction motor is practically a constant speed motor, that means, for the entire loading range, change in speed of the motor is quite small. Component of speed control of im by plc miniature circuit breaker mcb. If additional information is required, contact siemens industry. Control of induction motors by using programmable logic. Parameter symbol value 1 supply frequency f 50 hz 2 voltage v 400 v 3 stator resistance r s 1. The induction motor drives a variable load, is fed by an inverter and the plc controls the inverter.
Variable speed and flow capability with standard induction motor. To address this problem, a plcbased control system was designed for a threephase induction motor. When programming the plc, only one vfd speed control loop needs to. It involves developing a model of the fourfloor and simulating the control using a scada system. Plcbased control system for a threephase induction motor. This article explains the structure, principle of speed control and the features of each. Hardsoft simulator for electric engines controlled with siemens automates. Speed control of an induction motor there is a various method of speed control of an induction motor. Single phase induction motor direction control using plc.
These strategies are known as extinction angle control eac, modified phase angle control mpac, and symmetrical angle control sac. The system is designed using a plc for intelligent control on a threephase induction motor and. The operating point is the intersection of the two characteristics and we can fix for a given load and motor parameters. The rotor speed of an induction motor is given by the equation shown below. An induction motors rotor can be either wound type or squirrelcage type. The footing works for nearly any retrofit and a broad selection of options makes custom orders a thing of the past, allowing for optimal performance in diverse operating conditions. The vfd can be controlled remotely by using plcdcs systems the plc has to give set point for vfd drive to control the motor speed, this can achieved either automatically from the plc or by the operator action from the hmi. Dc motor controller, yeeco dc 1060v 12v 24v 36v 48v 60v dc motor speed controller, pwm stepless brushed motor control, variable speed control generator kit with. Electric motors from siemens offer maximum efficiency and an innovative platform concept to ensure the highest standards of performance. A using plc praveen kumar shukla1, ankur namdeo2, abhishek dixit3 1, 2, 3school of electrical engineering, vit university vellore632014, tamilnadu, india abstract. Plc application for speed control of ac motors with vsd. Also the implementation of a hardware and software for speed control and protection with the result obtained from the test on induction motor performance is provided and this idea presents a design and implementation of a monitoring and control system for the three phase induction motor based on programmable logic controller plc technology.
Basic plc program for control of a threephase ac motor. Then for the main motor, synchronous speed is 120f 1 p 1. The plc in consideration is siemens s7200 with minimum of 14 inputs and 10 outputs, and the scada system in. Plc analog programming and speed control of ac motor using plc. Apr 22, 2017 s7 200 siemens plc control speed of ac motor using step7 microwin software also using kips server for communication between step 7 with controlling gui. Speed of a dc shunt motor can be varied very easily with good efficiency, but in case of induction motors, speed reduction is accompanied by a corresponding loss of efficiency and poor power factor. A common plc application is the speed control of ac motors with variable speed vs drives. This paper is on the design and implementation of a 4floor elevator control system using programmable logic controller plc. Pdf speed control of induction motor using plc and scada. The overall control system also becomes much simpler. Siemens the following line diagram illustrates how a normally open and a normally closed pushbutton might be connected to control a threephase ac motor.
Jan 09, 2017 this method is applicable to squirrel cage induction motor only. The application serves as an example of ac induction vector control drive design using a motorola dsp with sdk support. Input and output components of the processes are connected to the plc. This paper provides about the condition monitoring cm techniques for the 3. An843, speed control of 3phase induction motor using pic18 mcus. Various automation processes in the industry need control of ac induction motors using ac drives. In the following example, a normally open start pushbutton is wired to the first input i0. Introduction programmable logic controller plc is a special computer used in different educational studies and industrial processes, such as control of machinery on factory assembly lines1. In this way, the slip power of main motor is fed to the auxiliary induction motor at a frequency of f 2 s 1 f 1 let us now assume that p 1, p 2 and s 1, s 2 be the number of poles and slips respectively. Already has done this project using relay circuit and microcontroller. Speed control of induction motor using plc and scada. Induction motors generators 1 table of contents page page.
Three phase motor, the programmable logic controller. Automation is referred to as creation of technology in a form such that the work is done by. In addition, electronics can reduce the systems average power consumption and noise generation of the motor. In the 1960s, the rst plc is designed by general motors gm 6. According to set point value, plc will control the drive speed and vfd drive finally controls the motor speed. Speed control of induction motor by variable frequency control. In most of the industrial application vfd variable frequency drives is used to control the speed of induction motor. The diagram in figure 1 shows an operator station used to manually control a vs drive.
A driver used in control system is siemens micro master 440. A programmable logic controller plc is a specialized computer. Multi threephase induction motor motion controller keywords plc, vfds, multimotor simulation, flc. This video explains the basics of analog io programming using rs logix 500 plc software with an example. Plc based multi threephase induction motors motion. The hardware set up consists of vfd, conveyor connected with ac motor, 2 discrete.
S7 200 siemens plc control speed of ac motor using step7 microwin software also using kips server for communication between step 7 with controlling gui. Speed control of induction motor 7 ways to control induction. Aug 16, 2017 this video explains the basics of analog io programming using rs logix 500 plc software with an example. Speed control of three phase induction motor electrical4u. Although it is difficult to control voltage and frequencies at these high powers, the use of a standard induction motor allows a cost effective speed control system to be built. We use here delta ac motor drive for its operation. Controlling 3 phase induction motor using vfd and plc. Our control system will be held using the available siemens plc. Hello friends, i am posting version3 project of single phase induction motor direction control. Motor speed control using vfd and plc programming ladder. Frankly, ive been searching before for some sophisticated siemens examples but i ended up designing my own algorithm for a position control. The speed of induction motor can be varied by changing supply voltage. Induction motor speed control using plc and scada irjet.
Jan 20, 2016 speed control of induction motor using plc and scada system published on jan 20, 2016 automation or automatic control is the use of various control systems for operating equipment such as. Fault diagnosis of induction motor using plc open access. The dc motor is an attractive part of electrical equipment. Sd200 the simotics sd200 low voltage motor from siemens combines flexibility, performance and efficiency to meet any customer need. Therefore, the problem of induction motor protection attracted many researchers.
Vf speed control of three phase induction motor by using plc and scda. How will the inverter and any control equipment contactors, plcs, relays. Speed control of dc motor by programmable logic control with. Manufactures of plc allen bradley siemens mitsubishi hitachi. Various control schemes have been used to operate the induction motor in speed and position control modes of operation using plc programming. The speed control of induction motor is achieved from the various tests performed and its protection is done by its software and hardware implementation. During that period, a programmable logic controller is commonly abbreviated as pc. The programmable logic controller plc type siemens simatic s7300 dominates the control system and the real time data communication between the plc and personal computer pc using third party. Monitoring and control of a variable frequency drive using plc. Speed control of induction motor using pi and pid controller. Plc, scada, automation, induction motor, speed control. Speed control of a dc motor using plc and pic microcontroller. Pdf design of a plcbased variable load, speed control system.
Experimental study of speed control of induction motor using plc. To study the different industrial applications of plc. Pdf speed control of three phase induction motor using plc. Oct 29, 2011 as i write my program to create two functions fb41the first function is to be master speed because this function set piont is analog from 4 to 20 mafor the first master motor,and the second motor should follow the master at the same speedthats with the. Siemens standard drives application handbook siemens industry. A simple control panel is wired using an allen bradley plc for. Abstract programmable logic controller plc and supervisory control and data acquisition scada are two new. Methods of speed control of induction motor electrical. Speed control of three phase induction motor using plc. Therefore in order to control the speed of a standard ac motor, the applied frequency and voltage must be controlled. Lowvoltage motors and electric motors for motion control applications.
Request pdf experimental study of speed control of induction motor using plc. Pdf design and plc implementation for speed control of. Speed control methods of various types of speed control motors. Three phase induction motor an electrical motor is such an electromechanical device which converts electrical energy into a mechanical energy. Speed control of induction motor using plc and scada system.
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