Nmicroprocessor based control of electric drives pdf merger

Permanent magnet synchronous motor pmsm dynamic model. An example of an openloop control system is an electric toaster. Today, electric drives, power electronic systems and their controls are getting more and more complex, and their use is widely increasing in all sectors. Electronic systems are applied in all branches of industry as well as in domestic equipment. Converters having electronic control feed an increasing number of drives. Pancake motors are widely used in highperformance servocontrolled systems. Controller software includes a number of contemporary control methods, like adaptive control, model based control etc. Principles, control, modeling, and simulation takes a groundup approach that emphasizes fundamental principles. This chapter is concerned with the principle, hardware and software implementations, and some processing techniques in inverterdriven ac motor systems which are controlled by microprocessors. International journal of engineering trends and technology ijett volume 16 number 4 oct 2014. Drives employing electric motors are called as electrical drives.

Describe the working operation of microprocessor based electrical drives. Providing a balanced treatment of the subject, electric machines and drives. Digital signal processing based speed control of induction. Control in power electronics and electrical drives 1st.

Classification of electric drive with advantage and disadvantage. A firing scheme based on a microcontroller to control an anti parallel connected single phase thyristor dual converter is presented. Whenever the term electric motor or electrical generator is used, we tend to think that the speed of rotation of these machines is totally controlled only by the applied voltage and frequency of the source current. The dc motor is very difficult to contr ol unlike the stepper motor, which can be controlled by giving the appropriate control word. What are merits and demerits of microprocessor based drive. Dc motor speed control using microprocessor technique intoduction. Predictive control in power electronics and drives. Electrical drives and controls question papers anna university. Up to 400 amps of microprocessor based control with an extremely compact footprint.

Abbs industrial drive, acs800 abbs acs800 industrial drive is an energy saving, compact drive which can be connected to almost any control system. Implement the motor and accompanying rotary sensor into a motor control circuit in both hardware and software. Integrate the motor to a machine, based on analysis of motor equations for voltage, current, torque and speed. If several group of mechanisms or machines are organized on one shaft and driven or actuated by one motor, the system is called a group drive or shaft drive. A microprocessor based control system can also be built where a phase. An electric motor together with its control equipment and energy transmitting device forms an electric drives. Electric drives control systems description and applications. An electric motor is an electrical machine that converts electrical energy into mechanical.

The fcs mpc is usually preferred in the control of electric drives due to the easy. A 32 bit microprocessor, tms320f2809, is utilized to implement both the. It is evident that it is rather involved and time consuming to design and develop a microprocessor based variable speed drive. Difference between microprocessor and microcontroller. Digital control of electric drives, volume 43 1st edition. Various research areas can be subdivided from electric drives as shown in figure 3. A microprocessor scheme to control a naturally commutated sixpulse thyristor converter fed by a variable speed synchronous generator, including a microcomputer software solution to the problem of detecting the line voltage zerocrossings in presence of noise. The notable impact of vector control of ac drives on most. The system which includes an electric machine, a power converter, based on semiconductor switches, and several control devices is known as an electric drive. Introduction to electric drives module 1 modern electric drives machine design utility interface speed sensorless renewable energy machine theory nonlinear control realtime control dsp application pfc speed sensorless power electronic converters interdisciplinary several research area expanding. Electric drives, second edition ion boldea, syed a. For many years the motor controller was a box which provided the motor speed control and enabled the motor to adapt to variations in the load. But the speed of rotation of an electrical machine can be controlled precisely also by implementing the concept of drive the main advantage of this concept is, the motion control. Principles of the simulation of digitally controlled electric drive systems.

Elements of controlled electrical drive figure 1 shows the structural block diagram of a controlled electrical drive. This book presents a unified treatment of complete electrical drive systems, including the mechanical parts, electrical machines, and power converters and controls. The author carefully deploys physical insight, mathematical rigor, and computer simulation to clearly and effectively present electric machines and drive. Microprocessor control of synchronous motor drives. Pdf real time control of electrical machine drives. Com ponents of electrical drives the main components of a modern electrical drive are the motors, power processor, control unit and electrical source. However, it is essential to establish a modelbased control for. Electric drives motor controllers and control systems description and applications purpose. Therefore, with the appropriate pulse pattern on the power switches of the inverter. Basic elements of electric drive,braking of induction motor, braking of synchronous motor,bridge rectifier circuit diagram with freewheeling.

Digital signal processing based speed control of induction motor drive system international journal on advanced electrical and electronics engineering, ijaeee, issn print. Mechatronic systems comprise a large variety of electrical drives. New roles for permanent magnet technology abbs permanent magnet technology has found its way into marine applications and wind power generators. Basic components of an electric drives system classroom lecture slides notes pdf. Controlled rectifiers single phase and three phase fully controlled and semi. This book provides a comprehensive introduction to the fundamental concepts of electric drives and is eminently suited as a textbook for b. Fundamentals of electrical drive controls josko deur and danijel pavkovic university of zagreb, faculty of mechanical engineering and naval architecture, i. Electrical drives play an important role as electromechanical energy converters a wide range of applications, for example machine tools in manufacturing industries, photocopies, cd player, electric windows in the car, prosthetic hands and other medical devices. Model based predictive control of electric drives complete guide lecture classroom notes pdf. Special thanks to getachew darge and bengt simonsson for helping me out in the lab. Smaller and smarter the future of ac drives drives are becoming more intelligent, with better communications and are easier to install and control. These microprocessor based, sensorless vector drives provide adjustable speed control for threephase motors. Acquisition structure acquisition of the assets and liabilities of the businesses and stock of the related companies expected schedule signing.

Based on the examples of drives discussed in the foregoing, general outlines may be drawn for designing the control system design of variable drives using a microprocessor. Scadasupervisory control and data acquisition, instrument society of. Electrical drives, control, modeling, dc motor, permanentmagnet. Measurement and processing of realtime data for computerassisted characteristic evaluation. Electrical drives play an important part as electromechanical energy converters in transportation, materials handling and most production processes. Electrical drives is defined as a form of machine equipment designs to convert electric energy into mechanical energy and provide the electrical or electronics control of the system. The thyristor dc drive remains an important speedcontrolled industrial drive. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Microprocessor and microcontroller based electrical drives are dc motor drives, induction motor drives and traction motor drives. This trainer is used by the students in the electric drives laboratory to control the speed of dc motor. Today about 60 % of the electric energy produced will be converted and used by electric drives of technological machines.

Ac and dc motors in machine tools, industrial robots. Vector control of ac drives was a technical novelty ten years ago, but today this method is largely used in frequency converters. Control techniques for electric drives, block diagram representation, transfer functions, transient response, frequency response and stability, compensating techniques. Pdf developments of power system protection and control. Microprocessor controlled ac and dc drives ppt free download as powerpoint presentation. An openloop control system utilizes a controller or control actuator to obtain the desired response as shown in figure 2. Digital motion control techniques for electrical drives. Visually both microprocessor and microcontroller almost look identical but they are different in many aspects. Here the dc motor is controlled by the microprocessor 8085.

One component defines the magnetic flux of the motor, the other the torque. Dc motor speed control using microprocessor technique. Dynamics and control of electrical drives electronic. They are an immediate solution for high power reversible drives and are becoming competitors to dc and induction motor drives. Energy management and control of electrical drives in. It can also be used most effectively by all those preparing for gate and upsc competitive examinations, as well as by practising engineers. Chapter 5 predictive control in power electronics and drives. Chapter 2 introduction to microprocessor based control. It consists of an electric motor motors, a transfer mechanism, an electrical energy converter, and a control system. But control of electrical drives is also necessary because all the functions accomplished by the drives are mainly transient operations i.

Vector control, also called fieldoriented control foc, is a variablefrequency drive vfd control method in which the stator currents of a threephase ac electric motor are identified as two orthogonal components that can be visualized with a vector. Microprocessor controlled ac and dc drives ppt computer. The key element in the proposed system is the wide area realtime protection and control information platform, which not only enables the merger of three lines of defence for power system. Aguilera and tobias geyer abstract in this chapter we revise basic principles and methods of model predictive control with a view towards applications in power electronics and drives. The control system of the drive calculates the corresponding. Microprocessorbased controller design and simulation for a permanent magnet synchronous motor drive article pdf available in ieee transactions on industrial electronics ie354. Dynamics and control of electrical drives electronic resource. A ceiling fan motor with regulator and also with blades, a food mixer with food to be processed, a motor and. May 18, 2012 introduction to electric drives module 1 modern electric drives machine design utility interface speed sensorless renewable energy machine theory nonlinear control realtime control dsp application pfc speed sensorless power electronic converters interdisciplinary several research area expanding. Control system design of microprocessor based variable. It provides links among electrical machine and control theory, practical hardware aspects, programming issues, and applicationspecific problems. The development of electric drives took place as the demand of control of electric motor drive system and industrial control existed. What are merits and demerits of microprocessor based drive system.

The openloop control system utilizes an actuating device to control the process directly without using device. Synchronous superlatives a new generation of high power fixed speed motors allows electric drives into markets once dominated by mechanical drives. Adaptive refrigeration microprocessor based control of an inverted pendulum. Computeraided design of the digital control of electric drives. International journal of engineering trends and technology. Digital control of electrical drives offers insight into electric drives and their usage in motion control environment. Microprocessor based single phase speed control of. Overview of advanced control strategies for electric machines. In a particular memory circuit, the addresses might start at 1oo0 and run consecutively.

This microprocessor based system is designed with a new integrated circuit lmd 18200 which contains a fourquadrant switching circuit and onboard control logic. Electric drives an integrated approach classroom notes lecture pdf. The content is concentrated around electromechanical energy conversion based on lagranges method and its clear and subsequent application to control of electric drives with induction machines. Online system identification counterflow heat exchanger. Industrial electronics and electric drives a short overview article pdf available in international journal of industrial electronics and drives july 2014 with 4,471 reads how we measure reads. I would like to thank all the people at the department of industrial electrical engineering and automation at lund university for all the amusing discussions and the relaxed atmosphere. Control in power electronics and electrical drives 1st edition. Electrical drives and controls nov,dec2015, nov,dec2014,electrical drives and controls may2014,electrical drives and controls nov,dec20,electrical drives and controls may2012,electrical drives and controls nov,dec2012,electrical drives and control dec2009,electrical drives and controls ap,may2010. Aug 22, 2014 einstein college of engineering electric drives is multidisciplinary field. Microcomputer a computer with a microprocessor as its cpu. Based control 29 is given a unique numeric address, which reprcsents its location just as a sreet adalrcss represents the location of a house, dala are written into memory and read out of memory, based solely on thoir address. Torquespeed characteristics and control arrangements. Classification of electric drive generally classified into 3 categories.

The basic procedure of feedback and feedforward cascade control system design is presented for the. Electric drives full notes, pdf, ebooks, all units. Unesco eolss sample chapters electrical engineering fundamentals of electrical drive controls josko deur and danijel pavkovic encyclopedia of life support systems eolss 2. Microcontrollers for the drive train in hybrid and.

Jul 30, 2018 it can be said that the electrical drives enable us to control the motor in every aspect. Energy management and control of electrical drives in hybrid. Describe the working of ad and da converter in microprocessor based drives. Control in power electronics and electrical drives contains the proceedings of the second international federation of automatic control symposium held in dusseldorf, germany, on october 35, 1977. Draw and explain the block diagram of microprocessor based ac drives. Alternating current ac induction and synchronous machines are frequently used in variable speed drives with applications ranging from computer peripherals, robotics, and machine tools to railway traction, ship propulsion, and rolling mills.

Power electronics and drives malaviya national institute of technology, jaipur page 6 optoelectronic devices and control, electronic circuits for photoelectric switchesoutput. The thesis contributions include a design procedure for the proposed switcheddfm drive based on a required. Nasar 2005 0849342201, 9780849342202 crc press, 2005 544 pages 2005 electric drives, second edition ion boldea, syed a. Request pdf overview of advanced control strategies for electric. Introduction to control systems school of electrical. The basic function of the drive is to control the flow of energy from the grid to process. Understand how to specify the proper ac or dc motor for a machine design. They come with standard features that can be programmed to customize the drives performance to suit a wide variety of applications, and they include a digital display and operating and programming keys on a removable keypad. Nasar electric drives are everywhere, and with the looming promise of electric vehicles and renewable energy, they will become more complex and the demands.

Buying an energyefficient electric motor fact sheet pdf. Draw and explain the block diagram of microprocessor based dc drives. Basic concepts of microprocessors differences between. Pdf industrial electronics and electric drives a short. It may employ any of the prime movers diesel engines, steam turbines and electric motors for supplying mechanical energy for motion control. However electric drives are commonly driven by a digital processor that fosters the.

Systems employed for motion control are called as drives. Torque control 152 speed control 152 overall operating region 154 armature voltage feedback and ir compensation 155 drives without current control 155 chopperfed d. Variable speed drives employing microprocessor control of synchronous motor drives are becoming very popular in industrial applications. The developments in power electronics and lsi technology have made the microprocessor based adjustable speed ac motor drives become promising. The symposium provided a forum for discussing the effects of converter control on the design of electrical machines.

The traction control technology of the 1980s was based on general purpose 16 bit microprocessors with software based control. Electric drives and electromechanical systems richard crowder amsterdam boston heidelberg london new york oxford paris san diego san franciso singapore sydney tokyo butterworthheinemann is an imprint of elsevier. Electrical powergenerating machines, which are used to drive powerconsuming machines, and electrical actuators control motors, servo drives, which are. Designs were often lossy or they provided only crude increments in the parameters controlled.