Speed of threephase ac induction motor, which cannot be changed directly. I cannot understand the relation between dc link vdc and inverter output rms line voltage. Furthermore, in contrast to direct current dc motor, it can also be used in hostile or volatile environment. Dc motor speed control system the speed control of a motor is frequently required in industrial applications, robotics, home. By using variable frequency control, it is possible to adjust the speed of the motor either above or below base speed. Methods of speed control of induction motor electrical. Thus, the speed of an induction motor depends on slip s, stator frequency f and the number of poles p for which the windings are wound. This method is implemented on hardware using embedded coder and texas instruments c2000 microcontroller using embedded coder. The most popular type is the 3phase, squirrelcage ac induction motor. Matlab simulation is carried out and results are investigated for speed control of induction motor without any controller, with pi controller and with pid controller on full load condition. The simulation results provides a smooth speed response. Currently the use of threephase induction machines has been increased tremendously in industrial applications due to several methods available to control the speed and torque of the motor. This method is implemented on hardware using embedded coder and. 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.
Actual speed of an induction motor is given as n ns 1 s. Firstly simulink model is developed by using matlab simulink software. Now speed of motor need to be change in many application3. Control the induction motor line current by adjusting the dynamometer field. Im are usually low cost, physically smaller, reliable and rugged machines. Scalar control is the term used to describe a simpler form of motor control, using nonvectorcontrolled drive schemes.
These techniques depend on varying the stator ac voltage to control the speed of threephase induction motor. By default, the block sets the simulation type parameter to continuous to use a continuous sample time during simulation. Speed control of single phase induction motor using fuzzy logic controller chapter pdf available january 2016 with 1,206 reads how we measure reads. Speed control of induction motor 7 ways to control.
Svpwm based speed control of induction motor with three. This paper presents speed torque characteristics of induction motor which are calculated. Teaching of simulation an adjustable speed drive of induction. Matlab simulation for speed control of three phase induction. Noida abstract this paper presents a technique to control.
The complete mathematical model of the system is described and simulated in matlabsimulink. In the reference 389 ac chopper are used to obtain variable rms voltage from fixed voltage and frequency sources. Dynamic simulation of a threephase induction motor using. Also the induction motor can be run in either of the two directions which is quite useful in many applications. Speed control of induction motor using fuzzy logic approach. This necessitates a speed control mechanism that is efficient and is also safe to use. The rotor speed of an induction motor is given by the equation shown below. Simulink model of three phase induction motor file.
Figure 2 the 3phase induction motor matlabsimulink model in this model the simulation starts with generating a three. In addition to the above, 5level cascaded inverter and diode clamped 7level inverter is also simulated using matlabsimulink software as a additional research. Control tutorials for matlab and simulink motor speed. Speed control of three phase induction motor electrical4u. To use the ac drive models of the electric drives library, you first specify the types of motors, converters, and controllers used in the six ac drive models of the library designated ac1 to ac6.
Add an interpreted matlab function block from the simulink userdefined functions library. Induction motor speed control with staticinverter in the rotor, ieee trans. Speed control of single phase induction motor using triac. The motor is mounted in a test rig that allows one to control the torque applied to the motor shaft and to measure both rpm and torque. The dc voltage source is directly connected to inverter.
Chapter 3 induction motor and different speed control methods page no 3. This motor has a threephase winding at the stator and a wound rotor or a squirrelcage rotor. A properly designed variable frequency inductionmotor drive can be very flexible. The fuzzy logic controller is also introduced to the system for keeping the motor speed to be. From the main problem, the dynamic equations in the laplace domain and the openloop transfer function of the dc motor are the following. Educational tool, adjustable speed drive, induction motor, indirect field oriented control 1. The standalone vsi control system is implemented in the. Closed loop speed control of induction motor pi control. In this paper, an implementation of intelligent controller for speed control of an induction motor im using indirect vector control method has been developed and analyzed in detail. Speed control of induction motor drive using universal. Threephase induction 208v motor with matlab revised. Before discussing the methods to control the speed of three phase induction motor one should know the basic formulas of speed and torque of three phase. Matlab simulation for speed control of three phase.
It can control the speed of an induction motor over a range from as little as. A sliding mode control smc with integral surface is employed to control the speed of threephase induction motor in this paper. Pdf speed control of single phase induction motor using. These range from the simple equivalent circuit models to more complex d,q models and abc models which allow the inclusion of various forms of impedance andor voltage unbalance. Variable frequency control vf of induction motor drive matlab simulation sun innovative. Pdf speed control of induction motor using pi and vf.
Steady state response of speed, current and torque in induction motor are also obtained using this scheme. The response of the controller to load variations is looked at. Pdf speed control of induction motor using pi and vf scalar. With several available speed control techniques, this paper presents a new. Speed control of single phase induction motor using ac chopper by asymmetrical pwm technique neha jain n. Speed control of three phase induction motor using arduino. Record all nameplate information for the induction motor. The block uses the threephase input voltages to regulate the individual phase currents, allowing control of the motor torque or speed. Hi all, so im working on a project titled controlling the speed of a single phase induction motor.
The induction motor block implements a threephase induction motor. The ip controller is considered the major contribution in this paper. Induction motor, conventional pi controller, conventional pid controller. Pdf matlabsimulink based design and simulation of speed. Vf speed control of 3 phase induction motor using space. Simulation model of the proposed drive system the three phase induction motor parameters for use in matlabsimulink model are shown below induction motor parameters and specifications.
The simulation developed by using fuzzy matlab toolbox and simulink. 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. As the subject of the paper, the speed control of induction motor fed by a three phase voltage source inverter has been done using pwm. Vf speed control of induction motor file exchange matlab. Synchronous speed of the rotating magnetic field of an induction motor is given by, where, f frequency of the supply and p number of stator poles. This is a simple version of speed control of induction motor using vf control method. 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. The model is implemented using the same set of equations provided above in sections ii.
Doubleclick the function block, and enter the expression for torque as a function of speed. Then for the main motor, synchronous speed is 120f 1. Figure 2 depicts the complete simulink scheme of the described induction machine model. It directly provides rotary motion and, coupled with wheels or drums and cables, can provide translational motion. Motor using matlabsimulink in advanced electrical machine. This model depicts all the aspects of a three phase induction motor starting from input three phases up to the electromagnetically generated torque and speed. Pdf speed control of induction motor by using intelligence.
The inverter is consist of cascade connected inverters i. As literature suggests, the speed of a three phase induction motor can be controlled either by using armature voltage control technique or by. Different mathematical models have been used over the years to examine different problems associated with induction motors. Download project documentsynopsis induction motors have been used widely in different fields ranging from domestic appliances to industrial machinery. Performance of these controllers has been verified through simulation using matlabsimulink. Add a dc voltage source block from the simscape electrical specialized power systems fundamental.
Speed control of induction motor using pwm technique. The ac1, ac2, ac3, and ac4 models are based on the threephase induction motor. Simulation and speed control of induction motor drives ethesis. You should also make a dc measurement of stator winding linetoline resistance using a dmm. For this example, we will assume that the input of the system is. Simulation of speed control of induction motor using vf. Mohammed, speed control of single phase induction motor using microcontroller, iciac12th april 2014. Connect the output of the function block to the torque input port, tm, of the machine block. The speed control of induction motor is done at the cost of decrease in efficiency and low electrical power factor. This paper presents a fuzzy logic control for a speed control of dc induction motor. The structure of the control system has the form shown in the figure below. In this paper, indirect vector method is used to control the speed of induction motor.
Some of the advantages like low cost, rugged design less complex, and easy to maintain ac motors results in many of the industrial operations are performed with the use of ac drives than dc drives. Pi controller by integral plus proportional ip controller is proposed in this paper. Speed control of single phase induction motor using ac. Pdf comparison of fuzzy control rules using matlab. The strategy used is a modified field oriented control to control. Speed control of induction motor using pi and pid controller. The electric motor speed is fixed when ac motor is connected to ac line. The electric circuit of the armature and the freebody diagram of the rotor are shown in the following figure. Phase angle control method of speed control of single.
A three phase induction motor is basically a constant speed motor so its somewhat difficult to control its speed. Adegboyega, matlab simulation of single phase scr controller for single phase induction motor, international journal of electronic and electrical engineering, vol. In this model, speed of induction motor is controled by using svpwm based vf method. Simulation of 3ph induction motor in matlab with direct. While researching on the internet i came across this one circuit that proposes a model that uses a microcontroller and a triac circuit and a. Variable voltage variable frequency speed control of. Although a range of induction motor control techniques are available, generating variable frequency supply is a popular control technique, having a constant voltage to frequency ratio in order to attain constant. Speed control of an induction motor there is a various method of speed control of an induction motor. Pdf speed control of three phase induction motor using. Matlab software has been used to simulate the ac controller circuit, the load and component ratings chosen for power circuit in this work were about 10a and 230v. The analysis has been done in terms of thd in their line current. A common actuator in control systems is the dc motor. Variable frequency control vf of induction motor drive. Since the induction motor rms line voltage is specified as 220v, the vdc should be 1.
Hence, the synchronous speed changes with change in supply frequency. The speed control using pi and pid control modes is explained and an implementation of the controller using opamps is given. The motor is started under different loads in two methods. In this project we have made a computer simulation on speed control of induction motor where two level inverter fed to the induction motor. Figure 3 shows the simplified block diagram of the speed control of induction. The project is complete mathematical model of field orientation control foc induction motor is described and simulated in matlab for studies a 50 hp37kw, cage type induction motor has been considered. Closed loop vf based speed control of induction motor file. Design and simulation of three phase induction motor at different load conditions in matlab. Speed control of vector controlled induction motors using. Variable frequency drive is a system designed to control. Speed control of induction motor using vector control. When connected to main power supply, induction motors run at their rated speed, however there are many applications where variable speed operations are required. 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.
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. Ac induction motor is a special type of electric motor having its own typical characteristics and performance in terms of starting, speed control, protections, and so on. This paper seeks to carry out modeling, simulation and performance analysis of a variable frequency drive using matlabsimulink model. Speed control of vector controlled induction motors using integral. Modeling and simulation of direct torque control induction. Three phase induction motor induction is one of the widest spread motor due to its robustness, simple construction, no need for complex circuits for starting. Open loop control of induction motor im is used in this inverter scheme. Each method is studied and discussed using supporting simulation of currents, torque, speed, efficiency and power factor curves. These strategies are known as extinction angle control eac, modified phase angle control mpac, and symmetrical angle control sac. This paper aims at study of vf speed control technique for induction motor using space vector pulse width modulation technique with stepwise understanding of vf speed control method for three phase induction motor and space vector modulation and its realization by using matlabsimulink model for two level inverter. Matlab simulink modelings and experimental design of variable.
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