The performance of the control method has been demonstrated by simulations using the matlabsimulink software package. In this, two vector control strategies are implemented. Implement direct torque and flux control dtc induction. Simulink implementation of direct torque control drive for induction. This paper presents the development of a cosimulation platform of induction motor direct torque control dtc drive. With pwm, combined with modern control techniques such as fieldoriented control or direct torque control, you can obtain the same flexibility in speed and torque control as with dc machines. A direct torque control of induction motor drive has implemented in this environment to demonstrate the efficiency of this three software. The dtc induction motor drive ac4 block represents an improved scalar control drive for induction motors with direct torque and flux control. The speed control loop outputs the reference electromagnetic torque and stator flux of the machine. In this paper, comparison between the matlab simulink and ansys maxwell simplorer cosimulation is done for speed control of induction motor im based on the direct torque control. Narasimhaiah k achari, b gururaj, ashok d v kumar and vijaya m kumar.
Simulation results presented in this paper show the torque,flux linkag e and stator current ripple decreases with the proposed svmdtc algorithm. Asynchronous machine direct torque control with space. Therefore, an enhanced direct flux and torque control based on feedback linearization is implemented in one hand. Simulation of brushless dc motor using direct torque control. The direct torque controller generates the inverter pulses. The induction machine direct torque control singlephase block implements a singlephase induction machine direct torque control structure. Direct torque control, space vector modulation, induction motor i. Implementation and control of a dfim in matlab simulink duration. Matlabsimulink software simulates the suggested and conventional dtc. Control the rotor speed in a singlephase asynchronous machine asm based electrical drive using direct torque control. Simulation of direct torque control of induction motor using. Tech power electronics jntu college of engineering, hyderabad d.
Digital control with a direct torque control algorithm applied to a. This paper introduces the modeling of the direct torque control dtc system of permanent magnet synchronous motor based on matlab simulink. The scheme is intuitive and easy to understand as a modular approach is followed. Digital signal processor, direct field oriented control, direct signal processor, direct torque control, pulsewidth modulation. Direct torque controller makers of matlab and simulink. Direct torque control dtc for motor drive applications has been well established in both academia and industry. The following figures present the block diagram of the controller for the two types of modulation. Kiran kumar assistant professor jntu college of engineering, hyderabad abstractpermanent magnet synchronous motors. Simulation of direct torque control of induction motor using simulink, simplorer and maxwell software. To estimate the torque and flux, the induction machine direct torque control block discretizes the machine voltage equations in the stationary reference frame using the backward euler method. Matlab simulink implementation of switched reluctance motor. Direct torque control of permanent magnet synchronous motor. Have a look at the simulink model direct torque control of an induction motor by syed abdul rahman kashif as a crossreference where the author has modelled the electrical and mechanical systems separately the way you want.
Implement direct torque and flux controller dtfc or dtc. The direct torque controller dtc is built with two types of modulation, hysteresis modulation and space vector modulation svm. Simulation of direct torque control of induction motor using simulink. Space vector trajectory is also plotted to observe the performance. Induction machine dtc simulink mathworks deutschland. Direct torque control dtc is an advanced control technique with fast and. The control subsystem uses a cascade control structure. The srm drive waveforms phase voltages, magnetic flux, windings currents, motor torque, motor speed are displayed on the scope. This drive features closedloop speed control using hysteresisband torque and flux controllers. This paper proposes an effective sensorless direct torque control scheme for induction motor drive. Mar, 2017 matlab simulink implementation of the direct torque control scheme for induction motors is presented in this paper.
Simulation of direct torque controlled induction motor drive. In this paper the direct torque control model is designed and tested through matlab simulink software for torque and speed control of induction motor. To prevent a crash due to lowlevel graphics error, use software. Pdf simulink model of direct torque control of induction. Motor current, speed, and torque signals are available at the output of the. Direct torque control of an induction motor file exchange. Using matlab simulink software, here direct torque control of induction motor is implemented and the various fault issues of induction motor is presented with the help of fuzzy based fault. The discretetime equations for stator fluxes in the frame are. As can be noted, the srm torque has a very high torque ripple component which is due to the transitions of the currents from one phase to the following one. Simulation of direct torque controlled induction motor. These two control strategies are different on the operation principle but their objectives are the same.
The torque and flux references are tracked using hysteresis controllers and a switching table implemented with lut is used for selecting the optimum converters output. Jun 10, 20 this model simulates direct torque control of a three phase induction motor. Direct torque control dtc of induction motor file exchange. Maximum efficiency per torque direct flux vector control. The singlephase induction motor drive block models a vectorcontrolled singlephase machine drive. Speed estimator is implemented to control of speed of motor along with the torque. Project report on direct torque control of permanent magnet synchronous motor as without his constant motivation and support during my work, this would not have been possible. Direct torque control is a control technique used in ac drive systems to obtain high performance torque control. The induction machine direct torque control block implements an induction machine direct torque control dtc structure. Simulation results presented in this paper show the torque,flux linkage and stator current ripple decreases with the. Direct torque control design for three phase induction motor ijedr.
Feb 22, 2018 dtc induction motor drive matlab simulink. Pdf simulation of direct torque control of induction. Simulation of direct torque control of induction motor. Implement direct torque and flux controller dtfc or dtc model. This tutorial shows how to build a simple open loop ac drive controlling an asynchronous machine. Direct torque control of induction motor drive with flux.
Pdf direct torque control based constant volthertz technique was the effortless. The current is found to be sinusoidal and within rated current limits throughout simulation. Direct torque control dtc of im using space vector pwm. It offers a simple control structure, fast response, and robust operation 35. Direct torque control dtc is one of the most excellent control strategies of torque control in pmsm. The obtained model is also configured in matalb simulink. The direct torque controller generates the reference voltages required by the space vector modulator. It is considered as an alternative to the field oriented control foc or vector control technique. Direct torque control of three phase induction motor using matlab. This paper proposes a method of applying the space vector modulation technique for direct torque control dtc of a permanent magnet synchronous motor pmsm drive. Firstly, the control strategy is developed in matlab simulink for machine model with and without inclusion of saturation effect. Abbs respected drive engineering heritage and substantial resources have gone into developing direct torque control. The parameters like speed and torque are represented graphically. This example shows how to control an asynchronous machine asm using the direct torque control method.
Add a bus selector block from the simulink signal routing library. For simulation with the driving cycle speed reference and variable load torque. Singlephase induction machine direct torque control. The sample time of the direct torque controller, in seconds. Modelling and simulation of direct selfcontrol systems. In this paper, comparison between the matlab simulink and ansys maxwell simplorer cosimulation is done for speed control of induction motor im based on the direct torque control strategy. Beginner level, mathematical model of asynchronous motor in matlab simulink. The proposed scheme consists of enhancing the decoupling structure and variable estimation as well.
Modelling of direct self control the direct self control method gives an inverter. I truly appreciate and value his esteemed guidance and encouragement from the beginning to the end of this report. This paper proposes design and simulation of a direct torque controlled induction motor drive system based on space vector modulation technique for ripple reduction. A novel matlab simulink model of pmsm drive using direct torque control with svm. A direct torque controlled dtc induction motor im drive has been. The integration of the space vector modulation svm instead of the switching table in the dtc control scheme was a very helpful solution. The direct torque control dtc offers many advantages, such as simplicity, fast response and less sensitivity to machine parameters when it is compared to the field oriented control foc. In addition to these parameters like d and q stator current, d and q axis flux, torque and speed are obtained graphically.
Ijca proceedings on emerging technology trends on advanced engineering research 2012 icett1. Pdf the modeling and simulation of a permanent magnet. It is considered as an alternative to the field oriented control foc or vector control. A pibased speed controller supplies the torque reference. Direct torque control an overview sciencedirect topics. The machine speed is controlled in closed loop by direct torque control strategy.
Simulation of direct torque controlled induction motor drive by. Mathworks is the leading developer of mathematical computing software for engineers and scientists. Direct torque control design for three phase induction motor. Pdf modeling and simulation of direct torque control induction. Feedback linearization based sensorless direct torque control. The sampling time must be a multiple of the simulation time step. Simulink implementation of direct torque control drive for. Implement singlephase induction motor drive simulink. At full load, the machine has a rated speed of 1440 r. The use of svm enables fast speed and torque responses.
By this method it is preserved the principle of the conventional dtc regarding the decoupled torque and flux control, while. A comparative analysis of direct torque control and. Figure 6 shows the results of computer simulation, which are similar to those obtained using the classical numeric programming approach. An outer pibased speed control loop provides the torque and flux references to the direct torque control algorithm from the. Using the matlabsimulink software, we test indirect and direct field oriented control ifoc, and dfoc. The drive configuration consists of a halfbridge rectifier, a divided dc bus with two filter capacitors, and a twoleg inverter that supplies the motor windings. Direct torque control of permanent magnet synchronous. This example shows how to control an asynchronous machine asm using the direct torque control method with space vector modulator. The speed control loop uses a pi controller to produce the flux and torque references for the block controller. Direct torque control dtc has emerged over the last two decades as a suitable alternative to the wellknown field oriented control foc or vector control technique for electric drives mainly due to its simple control scheme, low computational time and reduced parameter sensitivity. This paper presents the development of a simulation platform for direct torque control of a threephase squirrel cage induction motor drive.
Simulink model of direct torque control of induction machine. Simulation of direct torque controlled inductionmotor. It has grown into a brand larger than torque control by incorporating intelligent user interfaces, drive diagnostic features, and systemlevel software. Pdf simulink model of direct torque control of induction machine. Such a technique is called as direct torque control dtc.
Asynchronous machine direct torque control with space vector. Direct torque control dtc is an advanced control technique with fast and dynamic torque response. Maximum efficiency per torque direct flux vector control of induction motor drives. May 27, 2017 matlab simulink implementation of the direct torque control scheme for induction motors is presented in this paper. A novel matlabsimulink model of pmsm drive using direct. Field oriented control foc and direct torque control dtc and the modulation is hysteresisbased. The direct torque control dtc method provides robust and fast torque. Direct torque control dtc of im using space vector pwm file. The direct torque and flux controller dtc directly controls the torque and stator flux of a.
In addition to this the simulink model of switched reluctance motor with direct torque control technique is designed and tested through matlab simulink software. Direct torque control dtc is one of the most excellent control strategies of torque control in induction machine. Jun 17, 2017 direct torque control dtc is one of the most excellent control strategies of torque control in induction machine. Simulink model of direct torque control of induction machine h. The performance of an induction motor under the classical direct torque control method and improved scheme have been studied and confirmed by simulation using matlab. With the help of finite element analysis method fem, a three phase induction motor is simulated. This model simulates direct torque control of a three phase induction motor.
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