A robust secondorder sliding mode control for singlephase photovoltaic gridconnected voltage source inverter. Sliding mode control of dcdc boost converter author. A novel fixedtimeconvergent sliding mode technology. Elements of controlled electrical drive figure 1 shows the structural block diagram of a controlled electrical drive. In this thesis, a novel sliding mode control strategy for mechanical systems with electric motors as actuators is proposed. Unesco eolss sample chapters electrical engineering fundamentals of electrical drive controls josko deur and danijel pavkovic encyclopedia of life support systems eolss 2. If the modelling is completely based on the physics of the particular system, it is called white box modelling. Unitv conventional and solid state speed control of ac drives speed control of three phase induction motorvoltage control, voltagefrequency control, slip power recovery schemeusing inverters and ac voltage regulatorsapplications text books 1. We can say that if the synchronous motors are designed to run only at rated synchronous speeds, then what is the use of introducing drives to them. Two sliding mode approaches via regulation of the dvoltage component a. As expected, the system states can be driven to zero or into a predictable and adjustable bound even when. Unlike linear control, switching sliding mode control does not replace the control system, but uses the natural properties of the control plant system effectively to ensure high control quality. Sliding modes applications in power electronics and.
Dualmotor systems have been widely used in industrial applications, and speed synchronization of the motors can always be deteriorated by system parameter uncertainties and load torque perturbations. Principle scheme a basic sliding mode control scheme of dcdc converters is shown in fig. The grey sliding mode controller is used to reject the uncertain bounded disturbances and parameter variations. Permanent magnet synchronous motors pmsms are widely used in low to mid power applications and high performance drives, e. Stepper motor and switched reluctance motor drives. Modeling of sliding mode controllerbased synchronous link.
Speed control of permanent magnet synchronous motor. These are, apart from electric clocks, mainly high power drives, such as for compressors in the chemical industry. The location of variables relative to sliding surface, which governs control law, is applied to the system. A sliding mode controller for induction motor drives a thesis submitted to national institute of technology, rourkela, for the award of the degree of master of technology in electrical engineering power control and drives by pragyanshree parida under the guidance of prof. The structural similarities among switching converters and electrical machines are used to show that the same structure of the controller could be used for plants under consideration. Position control of synchronous motor drive by modified. Controlledspeed synchronous motor drives 352 openloop inverterfed synchronous motor drives 353 selfsynchronous closedloop operation 354. Digital motion control techniques for electrical drives.
Electric drives, second edition ion boldea, syed a. Sliding mode regelungen zeichnen sich durch hohe robustheit gegenuber parameterunsi. Speed tracking and synchronization of a dualmotor system. Pdf sliding mode control for synchronous electric drives. A synchronous reluctance motor synrm driven by a grey sliding mode controller is presented. Sliding mode variable structure control for electric power.
Please find the full notes on electrical machines and drives. Fundamentals of electrical drive controls josko deur and danijel pavkovic university of zagreb, faculty of mechanical engineering and naval architecture, i. Sliding mode control in electromechanical systems vadim. Robust speed control of pmsm using sliding mode control smc. The proposed controller uses twophase sliding mode control smc where the 1st phase mainly controls the system in steady states and disturbed states it is a. The potential of sliding mode control methodology is demonstrated for versatility of electric drives and functional goals of control. Sliding mode control for synchronous electric drives 1st. Ieee transactions on control systems technology 1 control of a standalone wound rotor synchronous generator. Pdf in this paper, the same sliding mode controller with timevarying switching surface is applied to. Permanentmagnet synchronous motor is a multivariable nonlinear system with overcoupling and very sensible to outer disturbance and inner perturbance. The mathematical model for the synrm includes core loss. Abstractthis paper presents a sliding mode controller for a wound rotor synchronous machine, acting as a generator for an isolated load. Moghaddam, ari tammi, larserik thand electric motors in industrial applications account for approximately 60 65 percent of. Subbaram naidu and hoa nguyen, idaho state university this book, written by wellknown researchers in the field, presents the theory of sliding mode control systems with application to electrical motors and power.
Drives are employed for systems that require motion control e. Permanent magnet linear synchronous motor drive using. Highorder block slidingmode controller for a synchronous. Based on the dissimilar control object as well as entire and partial systemstate data, an exhaustive control design for dctoac inverters can be developed. A synchronous motor is the same physical machine as a generator, except that the direction of real power flow is reversed synchronous motors are used to convert electric power to mechanical power most synchronous motors are rated between 150 kw 200 hp and 15 mw 20,000 hp and turn at speed ranging from 150 to 1800 rmin. Jul 30, 2018 we can say that if the synchronous motors are designed to run only at rated synchronous speeds, then what is the use of introducing drives to them. The book covers the following topics three phase circuits and power magnetics transformers concept of electrical machiners dc motors three phase windings induction machines.
The starting point with sliding mode control is the definition of the sliding surface. Pdf model predictive control and sliding mode control for pmsm. In this paper, the design of projectionbased adaptive sliding mode controller asmc is presented for position control of permanent magnet linear synchronous motor pmlsm with unknown mover mass. Synchronous machines in power systems and drives most of the electrical power generators are three phase synchronous generators synchronous motors are competitive in higher power ranges because of efficiency and lower costs reluctance and permanent motors are popular at lower power ranges. Fossas abstractin this brief two sliding mode control alternatives to regulate the stator voltage amplitude for a stand alone wound rotor synchronous. As it was specified above, information acquisition on an operating. Blockdiagram of an electric drive system for pms motors. Pdf sliding mode control for electrical drives researchgate. Adaptive slidingmode torque control of a pm synchronous motor. Fixed switching period discretetime sliding mode current control. A quasisliding mode control qsmc to suppress chaos for a permanent magnet synchronous motor pmsm with parameters fall into a certain area is proposed in this paper. 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. Motion control versus speed control standard variable speed drives normally control the motor by giving a speed command.
Review of sliding mode observers for sensorless control of permanent magnet synchronous motor drives article pdf available in international journal of power electronics and drive systems 91. Index termspmsm, sliding mode control, adaptive hys teresis comparator. In this paper, a new robust control strategy for the dualmotor systems is developed by incorporating second order sliding mode control 2smc techniques. We know that electrical drives mainly accomplishes three kinds of work, starting speed control braking it can be said that the electrical drives enable us to control the motor in every aspect. Most synchronous motors are rated between 150 kw 200 hp and 15 mw 20,000 hp and turn at speed ranging from 150 to 1800 rmin. With motion control, there is always feedback of the real position. Index termsexcitation control system, power system control, power system stability, slidingmode sm control, synchronous generator. Combining adaptive backstepping sliding mode control absmc with multisegment velocity planning mvp method for the high precision permanent magnet linear synchronous motor pmlsm servo system. Introduction t he robust controller design for excitations in a single synchronous generator connected to an in. Design and implementation of a grey sliding mode controller.
Control system design of switching power converters and electrical machines based on the sliding mode approach is presented. Improved nonlinear sliding mode control based on load disturbance. Digital control of electric drives, volume 43 1st edition. There are many uncertain factors because of the nonlinearity of system and the road surface interference in the electric power steering system eps, and a pid controller is only used suitably when the system is a linear system and the system parameters are certain. B cost functional minimizing sliding mode control design for a synchronous motor 109 c performance using multiphase converter. Sliding mode control for synchronous electric drives sergey e. General arrangement of drives 45 voltage control d.
We develop a maximum power efficiency control strategy. It is shown that in these applications simplicity in implementation makes concepts of smc a very attractive design alternative. Purchase digital control of electric drives, volume 43 1st edition. Oct 18, 2008 a modified adaptive twophase sliding mode controller for the synchronous motor drive that is highly robust to uncertainties and external disturbances is proposed in this paper. A modified adaptive twophase sliding mode controller for the synchronous motor drive that is highly robust to uncertainties and external disturbances is proposed in this paper.
In this paper application of sliding mode control smc to electrical drives and motion control systems is discussed. Electric drives full notes, pdf, ebooks, all units fadoo eng is great site for us where we can find alot of book related to our carrier and we can improve our knowledge. The control methodology of the dctoac inverter has shown that the smt offers agreeable design alternatives 7,8,9,10. This article presented an improved nonlinear sliding mode control. Sliding mode control is concerned with forcing onemore variable to follow a specific trajectory which is known as sliding surface 67. Using the nonlinear pmsm model of equation 1, it is possible to design both a speed and a current sliding mode controller 7,8. In this context, this paper proposes a novel direct torque control dtc and variable structure sliding mode control vssmc scheme for wind farm wf based on the pmsgs.
Professor, department of electrical engineering for his constant. Electric drives full notes, pdf, ebooks, all units basic components of an electric drives system classroom lecture slides notes pdf model based predictive control of electric drives complete guide lecture classroom notes pdf. Permanent magnetic synchronous motors pmsm are receiving incrcascd. Combining lumping uncertainties and load disturbance and using. Discrete sliding mode speed control of induction motor using time. The main arguments in favor of sliding mode control are order reduction, decoupling design. Electrical drives, control, modeling, dc motor, permanentmagnet. Depending upon the method of acquisition of flux information, the vector control or field. The strengths of sliding mode controllers result from the ease and flexibility of the methodology for their design and implementation. Sliding mode control smc is gaining increasing importance as a universal design tool for the robust control of linear and nonlinear systems. Sliding mode control of an isolated wound rotor synchronous. The system typically has no feedback and speed reference is preset speeds, 0 to 10 volts, 4 to 20 ma, or fieldbus.
Synchronous motors controlled by variablespeed drives are. Suitable for undergraduate and postgraduate courses in electrical drives, this book covers topics on. Synchronous motors controlled by variablespeed drives are bringing higher efficiencies to industrial applications motoring ahead heinz lendenmann, reza r. Dcdc converter, boost converter, switched mode power supplies, sliding mode control. Sliding mode control of an isolated wound rotor synchronous generator a. Discretetime current control of synchronous motor drives school of electrical engineering thesis submitted for examination for the degree of master of science in technology. Theories of model predictive control mpc and sliding mode. Sliding mode control smc of electric drives constitutes a very popular control method for nonlinear multivariable and timevarying systems, e. Variable frequency synchronous motor drives springerlink. A quasi sliding mode control qsmc to suppress chaos for a permanent magnet synchronous motor pmsm with parameters fall into a certain area is proposed in this paper.
The main feature of the sliding mode is the robustness that the system acquires against disturbances in the load and in the. It consists of an electric motor motors, a transfer mechanism, an electrical energy converter, and a control system. A sliding mode variable structure controller which is based on the exponential approach law is proposed for eps for the nonlinear. Scmode vd sliding control vq pwm speed controller va vb vc m pmsm gear.
The standard dqmodel of the machine is connected to a resistive load. Control techniques for electric drives, block diagram representation, transfer functions, transient response, frequency response and stability, compensating techniques. A sliding mode controller for induction motor drives a thesis submitted to national institute of technology, rourkela, for the award of the degree of master of technology in electrical. Application of sliding mode control to dcdc converters 3. The chattering problem is tackled by including actuator. Consequently, these machines are used in heavy industry at the other end of the power spectrum, we find tiny singlephase synchronous motors used in control devices and electric clocks p, q v t motor. Especially, based on the new concept of qsmc, continuous control input is obtained to avoid chattering phenomenon. The voltage equations of the three phase induction motor in synchronous reference. This is the first text that thoroughly describes the application of the highly theoretical control design approach to synchronous drives in practice. Jul 30, 2018 electrical drives have become the most essential equipment now days in the electrical motors and other rotating machines. Robust sliding mode control of permanent magnet synchronous motor drives. Vedam subramaniam electric drives concepts and applications, tata mcgrawhill. Sliding mode technology smt is robust in the face of parametric changes and external interruptions. Control of a standalone wound rotor synchronous generator.
Fossas abstractin this brief two sliding mode control alternatives. A novel fixedtimeconvergent sliding mode technology using. Closed loop pi control of pmsm for hybrid electric vehicle using three. The answer is pretty simple, synchronous motor drives makes the starting, pull in and braking process smooth and without any problems. Quasisliding mode control of chaos in permanent magnet. Application of moving sliding mode control for a dc motor driven fourbar mechanism. Speed tracking and synchronization of a dualmotor system via. Simulation of electric drives using the machines library. With a practical, handson approach, electric drives, second edition is the ideal textbook to help students. Another field of application exists in pumped storage power plants, where the synchronous generators are used as motors in periods of low demand for electrical power to drive pumps, feeding water into elevated reservoirs for later. Discretetime current control of synchronous motor drives. The paper deals with the basic concepts, mathematics, and design aspects of variable structure systems as well as sliding modes as a principle operation mode. The basic concepts, mathematics, and design aspects of variablestructure systems as well as those with sliding modes as a principle operation mode are treated. To improve robustness of the servo systems, the method of sliding mode control is introduced and a simple controller based on the algorithm of sliding mode control is developed in this paper.
Induction motor drive system with sliding mode controller. Sliding mode controller enhancement in pmsm speed control. Moghaddam, ari tammi, larserik thand electric motors in industrial applications account for approximately 60 65 percent of consumed industrial electricity. Combining adaptive backstepping sliding mode control absmc with multisegment velocity planning mvp method for the high precision permanent magnet. They provide inherent order reduction, direct incorporation of robustness against system uncertainties and. Sliding mode control for synchronous electric drives. Speed control of permanent magnet synchronous motor using. The structural similarities among switching converters and electrical machines are used to show that the same structure of the. Sliding modes in electrical drives and motion control.
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