Winner of the standing ovation award for best powerpoint templates from presentations magazine. Free download induction motor seminar ppt, pdf report. Speed control of three phase induction motor ppt download. By controlling the frequency of stator emf, speed can be controlled. In this method of speed control of three phase induction motor rheostat is added in the stator circuit due to this voltage gets dropped. The main advantage of these motors is their ability to operate from a singlephase power supply a free powerpoint ppt presentation displayed as a flash.
It is widely used in industry due to low cost and rugged construction. An induction motor can be defined as the ac electric motor device in which a power source fed by the alternating current with the help of a primary winding. Matlab simulation for speed control of three phase induction. Generally, it is known as the asynchronous motor because its running speed is less than its synchronous speed. But the recent developments in speed control methods of the asynchronous motor have led. However, asynchronous motors do not inherently have the capability of variable speed operation. Jun 04, 2017 inverter ppt pdf powerpoint presentation. Using the hcsr04 ultrasonic distance sensor with arduino everything you need to know. The synchronous speed of an induction motor is given by the relation shown below. Induction motor speed control powerpoint ppt presentation. Speed control kit for induction motors jaycar electronics. Speed control of three phase induction motor presentation. Ppt single phase induction motor speed control powerpoint.
Induction motor seminar ppt, pdf report study mafia. The speed of an induction motor can be easily controlled by varying the frequency of the 3phase supply. The speed control of induction motor is done at the cost of decrease in efficiency and low electrical power factor. In case of three phase induction motor torque produced is given by t. Induction motors have been traditionally used as constant speed motors supplied by the ac power source. Speed control of induction motor using pi and pid controller. While control of the induction machine is considerably more complicated than its dc motor counterpart, with continual advancement of microelectronics, these control complexities have essentially been. The speed of the ac induction motor is adjusted by the frequency variation of the ac power to the motor.
The user can quickly start evaluating the performance of the vhz system with this method. This allows control of the steadystate speed or torque of the motor, while the magnetic field in the motor is kept at a constant, desired level. There are more than one methods to control the speed of induction motor, you can choose one depending on your resources, efficiency required etc. It certainly leads to the best performance and high efficiency of the induction motor. May, 20 this paper contains the description about the design, construction and implementation of the speed control circuit for induction motor. Ppt presentation on speed control of induction motor. The synchronous speed and therefore, the speed of the motor can be controlled by varying the supply frequency. 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. A wound rotor, has a 3phase winding similar to the stator winding. As previously, we have covered a lot of important topics.
Nov 07, 2016 speed in induction motor is controlled by 1. Pdf speed control of induction motor using pi and vf. These strategies are known as extinction angle control eac, modified phase angle control mpac, and symmetrical angle control sac. The proposed technique is very simple and robust to. If the emf in the rotor of an 8 poles induction motor has a frequency of 1. Simulation diagram this is the simulation diagram for induction motor. If the stator losses are also considered, the air gap power dissipates in the rotor circuit at low speed. Download 3 phase induction motor powerpoint presentation. Dc output of rectifier flows through the dc link to inverter input. Speed control of induction motor detailed explanation. Parameters used supply rms voltage 110 v frequency of sin wave 50hz power 0. In this system, the scalar control vhz of induction motor experiments with and explores the use of speed control. This will result in efficiency of three phase induction motor becomes 50%.
A sliding mode control smc with integral surface is employed to control the speed of threephase induction motor in this paper. The speed response of induction motor is checked for without controller, with pi controller and with pid controller which is shown in figure 6, 7 and 8. Pdf speed control of induction motors kamakhya basumatary. In the present work, the simulation of speed control of motor at different. Dec 17, 2019 therefore by changing the number of poles we can easily change the speed of three phase induction motor.
Due to this reason, earlier dc motors were applied in most of the electrical drives. Theyll give your presentations a professional, memorable appearance the kind of sophisticated look that todays audiences expect. Whereas a synchronous motor s rotor turns at the same rate as the stator field, an induction motor s rotor rotates at a somewhat slower speed than the stator field. Chapter 3 induction motor and different speed control methods page no 3. Ppt induction motor speed control powerpoint presentation, free. These techniques depend on varying the stator ac voltage to control the speed of threephase induction motor. Speed control of three phase induction motor ppt play ppt. May, 20 using the hcsr04 ultrasonic distance sensor with arduino everything you need to know. How do we control the speed of a single phase induction motor. The approach is relatively easy as far as the power circuit and control circuit are concerned. The role of cycloconverter in speed control of induction motor is to vary the supply frequency which in turn, changes the speed of motor. The arrangement of this system is as shown in the figure at right. The rotor terminals are connected to three slip rings which turn with the.
How to control the speed of an induction motor quora. Ppt presentation on speed control of induction motor nilesh. A variable frequency drive vfd is used to control the speed of motor with the primary voltage control method. Speed control of induction motor project projects. The most popular type is the 3phase, squirrelcage ac induction motor.
Variable frequency drive for induction motor elprocus. The rotor speed of an induction motor is given by the equation shown below. Evaluating control algorithms using simulation is an effective way to determine the suitability of motor controller designs and reduce the time and cost of algorithm development before committing to expensive hardware testing. The induction motor block implements a threephase induction motor. This system is used where very sensitive speed control of motor is required e. This type of control is usually referred to as scalar control, since the controlled stator voltage or current are assumed sinusoidal, with only the magnitude and frequency adjusted, and with no. The block uses the threephase input voltages to regulate the individual phase currents, allowing control of the motor torque or speed. Motor control algorithms regulate speed, torque, and other performance characteristics, often for precision positioning. An inverter is nothing but a motor control which is used in adjusting the speed of an ac induction motor.
A three phase induction motor is basically a constant speed motor. Download project report, paper presentation ppt from below link. A three phase induction motor is basically a constant speed motor so its somewhat difficult to control its speed. Oct 24, 2015 asynchronous induction motors find enormous application in industrial work, so in order to attain maximum functionality of induction drives we designed this circuit to control the speed of induction motor. On the input side, voltage doublers are used and on the output side an hbridge, or 2phase inverter, is used as shown in figure 2. We can change the speed at the stator by, changing the supply frequency, changing the supply voltage and changing the number of stator poles. 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. Speed control at the rotor side we can change the speed at the rotor by,by adding some external resistance in the rotor circuitby cascade connection of the motor. Threephase induction motors are the most common and. Asynchronous motors are the most widely used electrical motors due to their reliability, low cost, ruggedness and robustness. Inverter not only adjusts the speed but also adjusts the voltage to the motor.
As a result of using vfd, large amount of energy is saved by reducing sudden jerks at the start of the motor. Speed control of induction motor is possible in two sides. An approach to estimating induction motor speed from measured terminal voltages and currents for speed sensorless vector control is described. Supply voltage is controlled for stator input using autotransformers. Speed control of an induction motor there is a various method of speed control of an induction motor.
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. This speed control method is known as volts per hz. Ppt induction motor powerpoint presentation free to. Application circuit to control the speed of single phase induction motor. The slip power dissipates in the external resistor in the slip ring induction motor. The stator works as the primary while the rotor works as the secondary. Full form kit includes case, doublesided silkscreened pcb, heatsink, cooling fan, hardware and electronics including parts from revised article in august 20. Worlds best powerpoint templates crystalgraphics offers more powerpoint templates than anyone else in the world, with over 4 million to choose from. Speed response of induction motor on full load condition with pi controller figure 8.
A theoretical background on scalar motor control principle. Speed control of induction motor using cycloconverter. The speed of the three phase induction motor at low speed is not economical. The synchronous motor either run at synchronous speed or it will not run. Today we are going to made available a powerpoint presentation file for all. M1 may be any ac motor or dc motor with constant speed. Speed response of induction motor on full load condition without any controller figure 7.