In order to achieve more economical control, conventional speed sensor has been replacing by sensorless speed. Abstract direct torque control based constant volthertz technique was the effortless. It is applied to a vectorcontrolled induction motor drive and is experimentally. The most common speedsensorless strategies do not control torque at zero speed.
Peter vas, sensorless vector and direct torque control, oxford university press, 1998. The conventional dtc suffers from high torque ripples and variable switching frequency due to utilizing hysteresis comparators. Essentially, there are two components of current in the st. Direct torque control of induction motor using space. Srinu naik abstract vector control is becoming the industrial standard for induction motor control. Sensorless vector control and vf have the same breakaway torque as sensor feedback control with vfds. It is function of the frontal area shape protrusion such as side, mirrors, ducts and air passages spoilers and any other factor. This involves calculating an estimate of the motors magnetic flux and torque based on the measured voltage and current of the motor.
Dtc direct torque control within a sensorless vector drive was developed by abb to accomplish just that type of control. Comparison of direct and indirect vector control of. Pdf dtc is a control technique in ac drive systems to obtain high. In recent years vectorcontrolled ac drives have taken over from more conventional dc drives. It also discusses the applications of artificial intelligence to. Sensorless vector and direct torque control monographs in electrical and electronic engineering vas, peter on. This site is like a library, use search box in the widget to get ebook that you want. Operating conditions are estimated from measurements of electrical parameters. Ac3 sensorless fieldoriented control induction motor drive.
Dtc is a method to control machine with utilizing torque and flux of motor controlled. Sensorless vector and direct torque control, peter vas. It is essential reading for anyone interestred in acquiring a solid background on sensorless torquecontrolled drives. In scalar control, which is based on relationships valid in steady state, only the magnitude and frequency of. Then the simulation models with the vector control and direct torque control using the space vector pulse width modulation method have. Pdf torque ripple reduction in direct torque control of. Sensorless control of induction motor drives at very low and. It also discusses the applications of artificial intelligence to drives. Introduction in recent years, several studies have been developed which propose alternative solutions to the foc control motor drive. This circuit uses a modified version of the ac3 block of specialized power systems library. It has some advantages such as high power density, direct drive, fast response, small size and light weight, so it has been widely used in driving the load directly in the industry application. It presents a detailed and unified treatment of sensorless vectorcontrolled and directtorque controlled drive systems.
Sensorless vector and direct torque control peter vas oxford. Torque control real sensorless vector control youtube. Sensorless direct torque control of induction motor using ai based. Pdf direct torque control of induction motor drives. The direct torque control is one of the excellent control strategies available for torque control of induction machine.
Direct torque control direct torque control dtc was proposed by m. Direct torque control of induction motor using ann technique. Vector control vs direct torque control comparative evaluation for pmsm drive article pdf available december 2010 with 1,305 reads how we measure reads. The torque calculation software sensorless vector control developed by hitachi ensures accurate torque control throughout the entire frequency range, even with general purpose motors. Direct torque control of brushless dc motor with non. Simple flux regulation for improving state estimation at very low and zero speed of a speed sensorless direct torque control of. Jose satish dhawan space centre, shar, sriharikota abstract. Applications are found everywhere including machine tools, robotics, electric traction, and computer peripherals. It builds on the authors popular vector control of ac drives and brings the subject fully up to date. The most common speed sensorless strategies do not control torque at zero speed.
What is the difference between vector control and dtc. Such decoupled torque and magnetization control is commonly called rotor flux oriented control, or simply foc. 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. Direct torque control dtc is an emerging technique for controlling pwm inverterfed induction motor im drives. A simpler alternative to the vector control is the direct torque control dtc. Peter vas, vector control of ac machines, peter vas, sensorless vector control and direct torque control, oxford university press, 1998. Sensorless vector control is a variable frequency drive vfd control strategy that improves motor performance by regulating the vfd output based on a mathematical determination of motor characteristics and operating conditions. Direct torque control of interior permanent magnet.
Sensorless direct power control of induction motor drive using. Induction motor control methods are divided into scalar and vector control. It is essential reading for anyone interested in acquiring a solid background on sensorless torque controlled drives. Ijca direct torque control of sensorless induction motor.
In recent years vector controlled ac drives have taken over from more conventional dc drives. Design of direct torque controller of induction motor dtc. In scalar control, which is based on relationships valid in steady state, only the magnitude and frequency of voltage, current, and flux linkage space vectors are controlled. It is essential reading for anyone interested in acquiring a solid background on sensorless torquecontrolled drives. To the consideration of electric vehicle space is limited, in order to reduce the controller size to save space, this paper studied the sensorless control.
Peter vas sensor less vector and direct torque control free ebook download as pdf file. Tms320f2803x devices are part of the family of c2000. Sensorless control of induction motor drives at very low. This paper presents an improved direct torque control strategy dtc for induction motor drive. Kop sensorless vector and direct torque control av peter vas pa.
Blaschke, the principle of field oriented as applied to the new tran vector closedloop control systems for rotating machines. Speedsensorless vector torque control of induction machines. Sensorless vector and direct torque control vas, peter. Therefore, since 1986 1, direct torque control dtc has been introduced to satisfy this desire. It models a sensorless fieldoriented control foc induction motor drive with a braking chopper for a 200hp ac motor. Pdf this paper shows the application of fuzzy logic technique based on duty ratio control and contribution of fuzzy logic control to select optimum. Several solutions for sensorless control of induction motor drives have been proposed based on the machine fundamental excitation model and high frequency signal injection methods.
Stator voltage space vector a change in the torque can be achieved by keeping the. Direct torque control scheme was first proposed by takahashi 3 and depenbrock 4 for induction motor drives. This paper presents a comparison between sensor or indirect field oriented control. There are ways to control torque at zero speed without a speed sensor, but they are a bit trickier and mostly require specific types of motors. It presents a detailed and unified treatment of sensorless vector controlled and direct torque controlled drive systems.
Sensorless field oriented control of 3phasepermanent magnet synchronous motors bilal akin and manish bhardwaj abstract this application report presents a solution to control a permanent magnet synchronous motor pmsm using the tms320f2803x microcontrollers. Pdf sensorless control of induction motor drives at very low and. Plots, going clockwise from the top left, are estimated torque, observer rotor speed, direct and quadrature motor stator current, and quadrature and direct observer stator current. This paper presents a sensorless induction motor control scheme using an adaptive observer for the stator flux and the rotor speed estimation based on discrete space vector modulation dsvmdtc switching strategy. Modeling and simulation of direct torque control induction motor. Comparison of sensor and sensorless vector control techniques for induction motor in eot crane low speed applications k. Introduction the permanent magnet linear synchronous motor is a kind of novel motor. The direct torque control dtc is the main interest of this project and it will be described in the following sections.
This is the first comprehensive book on sensorless high performance a. Monographs in electrical and electronic engineering 25. Direct torque control of permanent magnet synchronous motor. Direct torque control of brushless dc drives with reduced. Direct torque control of induction motor using space vector. Dtc is preferred over other controlling schemes for high dynamic applications, but, on the other hand, shows higher current and torque ripple. A dspbased discrete space vector modulation torque control.
High breakdown torque motors will have a greater constant horsepower range. The efficiency of direct torque control for electric vehicle behavior improvement 1 2. The mathematical model which consist of three parts, the three phase induction motor model, the space vector modulation inverter. The research of sensorless vector control for permanent.
The position sensorless control method based on direct torque control was carried out aiming at the interior permanent magnet synchronous motor ipmsm in this paper. Sensorless field oriented control of 3phase permanent magnet. Peter vas sensor less vector and direct torque control scribd. Alshawi,space vector modulation direct torque speed control of induction motor, thesis, nahrain university, dec. Duke university of canterbury new zealand abstract this paper presents the results of an investigation into the suitability of a direct torque control method for an electric vehicle application. Meanwhile, in order to improve the control rapidity as much as. Everyday low prices and free delivery on eligible orders. This book examines sensorless vector controlled drives and direct torque controlled drives. Nov 28, 2016 torque control real sensorless vector control automatikos centras. Sensorless svmdirect torque control for induction motor.
Speedsensorless vector torque control of induction. Download sensorless vector and direct torque control or read sensorless vector and direct torque control online books in pdf, epub and mobi format. Sensorless field oriented control of 3phase induction. The electromagnetic torque of a threephase induction motor can be written as 2, 4. Improved direct torque control for sensorless matrix converter drives with constant switching 115. Induction motor, field oriented control foc, direct torque control dtc, sensorless, space vector pulse width modulation svpwm. Direct torque control dtc is a method used in variable frequency drives to control the torque and thus the speed of threephase ac electric motors.
Speed sensorless vector torque control of induction machines 175 fig. The vector control technique decouples the two components of stator current space vector. The efficiency of direct torque control for electric. Direct torque control of induction motor using space vector modulation svmdtc abstract in this study, direct torque control dtc of induction motor is evaluated based on space vector modulation svm. Hitachi wj200 sensorless vector vs constant torque. Direct torque control of sensorless induction motor drive using space vector modulation twitter. Dtc is direct torque control, a method used by abb in their highperformance drives. Vas, sensorless vector and direct torque control, oxford. It is essential reading for anyone interestred in acquiring a solid background on sensorless torque controlled drives. Sensorless vector and direct torque control monographs in. Sensorless vector and direct torque control peter vas.
Implementation of field oriented speed sensorless control. Torque control real sensorless vector control automatikos centras. A novel control method using space vector pulse width modulation was proposed. Comparison of sensor and sensorless vector control techniques for induction motor in eot crane low speed applications. Vector control is a generic term, while dtc is specific in how the vector control is performed. A comparison between vector control and direct torque. Sensorless vector and direct torque control peter vas bok. Direct torque control of permanent magnet synchronous. Peter vas sensor less vector and direct torque control.
Direct torque control of brushless dc motor with nonsinusoidal backemf t. Sensorless vector and direct torque control monographs in electrical and electronic engineering. Speedsensorless vector torque control of induction machines 175 fig. Sensorless speed and direct torque control of interior permanent magnet synchronous machines based on extended kalman filter mihai cernat, vasile comnac, florin moldoveanu faculty of electrical engineering, transilvania university of brasov, romania abstract the application of vector control techniques in. Simulations as well as experimental results are presented for various speed and load conditions to demonstrate the performance of natural observer in sensorless vector control applications. In this paper the implementation of the vector control and direct torque control systems for a marine permanent magnet synchronous motor has been studied. Comparison of direct and indirect vector control of induction. What is the difference between vector control and dtc direct. Sensorless vector and direct torque control cern document. Direct torque control principle direct torque control dtc is an optimised ac drives control principle where inverter switching directly controls the motor variables.
Pdf vector control vs direct torque control comparative. Vf control is adequate for 6 to 1 speed range applications where motor slip speed regulation is acceptable. The direct torque control is one of the excellent control strategies available for. By this method it is preserved the principle of the conventional dtc regarding the decoupled torque and flux control, while. The measured input values to the dtc control are motor current and voltage. Librairie generale francaise lgf laurence j peter, raymond. It builds on the authors popular vector control of ac drives and brings the subject fully up to. Srinu naik abstractvector control is becoming the industrial standard for induction motor control. It builds on the authors popular vector control of ac drives and brings the. It builds on the authors popular vector control of ac drives and brings applications are found everywhere including machine tools, robotics, electric traction, and computer peripherals. Direct torque control inverter drive systems abb avp. Fast and robust torque control in a very wide range of speed is very needed by various industrial ac drive applications. Buy sensorless vector and direct torque control monographs in electrical and electronic engineering by vas, peter isbn. Much recent research effort is focused on extending the operating region of sensorless drives near zero stator frequency 2, 3.
Sensorless vector and direct torque control by peter vas. The principle of vector control of electrical drives is based on. Stator and rotor flux based deadbeat direct torque control of. Comparison of direct and indirect vector control of induction motor b. Zhu, senior member, ieee, and david howe abstractthe application of direct torque control dtc to brushless ac drives has been investigated extensively. Direct torque control of sensorless induction motor. Sensorless field oriented control of 3phase permanent. Direct field oriented sensorless vector control scheme is used and the rotor angle is calculated from the estimated rotor fluxes. Click download or read online button to get sensorless vector and direct torque control book now. The dynamic modeling of induction motor is done in the simulink using the necessary equations. While dtc and vc have different concept of operation, they both provide an effective control of the flux and torque. Space vector modulation direct torque speed control of. May 14, 1998 it builds on the authors popular vector control of ac drives and brings applications are found everywhere including machine tools, robotics, electric traction, and computer peripherals.
Sensorless field oriented control of 3phase induction motors. Sensorless field oriented control of 3phasepermanent magnet synchronous motors bilal akin and manish bhardwaj. Direct torque control of brushless dc drives with reduced torque ripple yong liu, student member, ieee, z. This paper describes its application to brushless dc drives, and highlights. A dspbased discrete space vector modulation torque. The voltage is defined from the dcbus voltage and inverter switch positions. It allows the precise and quick control of the im flux and torque without calling. Improved direct torque control for sensorless matrix. Pdf svm and pi based simplest approach to direct torque. Comparison of sensor and sensorless vector control. The efficiency of direct torque control for electric vehicle. Such decoupled torque and magnetization control is commonly called rotor flux oriented control, or simply field oriented control foc. This book examines sensorless vectorcontrolled drives and direct torque controlled drives.
994 1246 3 276 1286 36 1359 95 680 889 1066 725 1476 522 947 708 779 1210 694 948 312 1401 921 1312 1287 704 988 879 1031 170 632 665 1525 1179 439 764 134 1131 1407 760 114