Switched reluctance motor for electrical drives offor electrical drives electric power plants equipment vladimir kuzmichev mpeitu, orgres. Switched reluctance motors science topic explore the latest questions and answers in switched reluctance motors, and find switched reluctance motors experts. The simulation results are made by matlabsimulink package. For the conventional 1210 srm, the motor has six phases.
Reluctance motors can deliver high power density at. Isbn 97895352677, eisbn 97895352684, pdf isbn 9789535147848, published 20170621. The switched reluctance machine was the first electric motor to have been designed but until the recent two decades hasnt been successfully implemented. Srms are gaining much interest because of their simplicity in structures, highoutput power, high starting torque, wide speed range, rugged and robust construction, reliability, and low manufacturing costs, which make these machines viable for many applications.
Switched reluctance motor construction and working. Abstract the generated torque ripple and acoustic noise in switched reluctance motors srm can be considered as one of the major disadvantages of the motor. That is, the srm has salient poles on both the rotor and the stator, but only the stator poles carry windings. Model the dynamics of switched reluctance motor simulink. The switched reluctance machine has a simple construction making it. Generally, all family members are appropriate for switched reluctance motor control. As the name suggests, a switching inverter is required for the operation of switched reluctance motor. A stepping motor is a special case of a variable reluctance motor or a permanent magnet brushless dc motor. Reluctance motor technical seminar report annual year 2014, electrical and electronics department, sdmt, ujire574240 page 4 chapter 2 switched reluctance motor 2.
Before being produced the 1612 switched reluctance motor was optimised and calculated with a finite. A very good overview of sensorless methods for determining the rotor position of switched reluctance motors is given in ray. Control methods of the switched reluctance motor in electric. The switched reluctance motor srm is an electric motor that runs by reluctance torque. Simulation of a 64 switched reluctance motor based on matlabsimulink environment 3 r krishnan, switched reluctance motor drives. The rotor is created from lamination in order to minimize the eddycurrent losses. Unlike a conventional synchronous motor, both the rotor. This example shows a currentcontrolled 60kw 64 srm drive using the srm specific model based on. Their combination with power electronic controllers may yield an economical solution. Studying different types of power converters fed switched. The first reference to the term switched reluctance was made by nasar in a paper in the iee proceedings in 1969.
The switched reluctance motors srm principle of operation has been. Therefore, firstly, the basic structure and principle are introduced. Construction details of switched reluctance motor with six stator poles and four rotor poles can be explained by referring to figure 3. This is a 4phase machine with 4 stator pole pairs and 3 rotorpole pairs 86 motor.
Switched reluctance motors the structure of a switched reluctance motor is shown below. Switched reluctance motor srm is also known as variable reluctance motor. These motors, sometimes called variable reluctance motors can be considered as a class of brushless stepper motors. The fall time of the currents in motor windings can be thus reduced. Apr 02, 2014 the torque ripple is an inherent drawback of switched reluctance motor drives. Inductance profile of 5 sections for the motor versus translator position iii. For their operation the excitation unit which is controlled in accordance with the rotor angle position is necessary. The following figure shows the ideal waveforms phase a inductance and current in a 64 srm. A switched reluctance motor is an electric motor in which the torque is produced by the tendency of its moveable part to move to a position of least reluctance, which corresponds to the position of maximum inductance miller 1993.
Charged evs a closer look at switched reluctance motors. The switched reluctance motor srm represents one of the oldest electric motor designs around. Pdf abstractthis paper is performed to develop a new 86 pole switched reluctance motor. A stepper motor is designed to make it suitable for open loop position and. The reluctance motor has basically two main parts called stator and rotor. We know about different types of synchronous motors, apart from all these motor works based on reluctance. Costa branco, simulation of a 64 switched reluctance motor based on matlabsimulink environment 3 r krishnan, switched reluctance motor drives. This motor works on the principle of variable reluctance. A reluctance motor is a type of electric motor that induces nonpermanent magnetic poles on the ferromagnetic rotor. Jan 25, 20 a closer look at switched reluctance motors.
Candidates of motor drives for 48v automotive applications. A variable reluctance motor intended to move in discrete steps, stop, and start is a variable reluctance stepper motor. The reluctance motor is a type of synchronous machine. Download complete switched reluctance motor srm project code with full report, pdf, ppt, tutorial, documentation and thesis work. Ppt of srm free download as powerpoint presentation. These converters are rdump, cdump, cdump with freewheeling transistor, asymmetric, series, and parallel type. Switched reluctance motor open model this example shows a currentcontrolled 60kw 64 srm drive using the srm specific model based on measured magnetization curves. Simulation and testing of a switched reluctance motor by matlab simulink and dspace master of science thesis in electric power engineering saman abbasian department of energy and environment faculty of electric power engineering chalmers university of technology goteborg, sweden, 20.
It works on the same principle as for stepper motor. Switched reluctance motors srm are seeing a resurgence as motor manufacturers improve their performance, reliability, efficiency, and cost as compared to other motors types. Unlike a conventional synchronous motor, both the rotor and stator of a switched reluctance motor have salient poles. Torque is generated through the phenomenon of magnetic reluctance. Switched reluctance motor srm thesis for phd and research students. For the optimum design of switched reluctance motors, this paper presents the. It is mainly due to frequent switching of phases for rotation of the motor and changes of the air gap length between the rotor and stator teeth. In many applications, electric vehicle drives for instance, it is highly desirable to have highest torqueampere. Numerical analysis of switched reluctance motorgenerator for kinetic energy storage with comsol multiphysics fem software arpad racz, istvan vajda budapest university of technology and economics, budapest, hungary racz. The rotor has neither windings nor permanent magnets. The basic construction of switched reluctance motor is shown in the figure.
The stator poles have concentrated winding rather than sinusoidal winding. Srm with hysteresis current controller iref hysteresis current controller converter 64 srm v i i. Switched reluctance motor srm drives are simpler in construction compared to induction and synchronous machines. Electrical drives structure of electric power plants. Simulation and testing of a switched reluctance motor by. Pdf this paper describes the design and implementation of a switched reluctance motor srm drive.
If smooth rotation is the goal, there is an electronicdriven version of the switched reluctance motor. Variable reluctance motors or steppers actually use rotors like those in figure below. This doublysalient arrangement is very effective for electromagnetic energy conversion. Switched reluctance motor srm inverter design with the. The switched reluctance motor srm is an electric motor which operates on reluctance torque. Switched reluctance motor srm is gaining much interest in industrial applications such as wind energy systems and electric vehicles due to its simple and rugged construction, high. The switched reluctance motor srm block represents three most common switched.
Unlike common brushed dc motor types, power is delivered to windings in the stator case rather than the rotor. Contributions to the study of switched reluctance machine for. Basically its kind of a stepper motor which rotates through a step angle when. Switched reluctance generators in contrast to wellknown conventional generators switched reluctance generator srg have toothed stator and rotor, and have neither windings nor permanent magnets in the rotor. Switched reluctance motor srm free download as powerpoint presentation. It has wound field coils of a dc motor for its stator windings and has no coils or magnets on its rotor. The placement of the stator windings to linear switched reluctance motor. Numerical analysis of switched reluctance motorgenerator for. This means, the rotor always tries to align along the lowest reluctance path.
Switched reluctance motor drives the name switched reluctance has now become the popular term for this class of electric machine. Switched reluctance motors srm are seeing a resurgence as. For the test drive, we selected the fluxcurrent method. Switched reluctance motorgenerator technology kaskod. Jul 30, 2017 a reluctance motor is a type of electric motor that induces nonpermanent magnetic poles on the ferromagnetic rotor. With continued research, different topologies have emerged presenting less torque ripple, high efficiency, high. The stepper motor which includes some of the features of the modern switched reluctance motor was invented and patented in the 1920s in aberdeen by c. Global and chinese 3phase switched reluctance motor industry, 2018 market research report 3phase switched reluctance motor industry, 202023 market research report is a professional and indepth study on the current state of the global 3phase switched reluctance motor industry with a focus on the chinese market. Principle of operation of switched reluctance motor. The stator winding is comprised of a set of coils, each of which is wound on one pole. When you use these presets, you do not need to specify the parameters in the.
Design of linear switched reluctance motor driver for. The conventional variable reluctance motor that is nothing but the switched reluctance machine has a doubly salient laminated structure which is very simple and robust. Please check the document version of this publication. Electric drives brushless dc ac and reluctance motors. The origin of the reluctance motor can be traced back to 1842. Modeling, simulation, analysis, design and applications 4 hankyung bae, control of switched reluctance motors considering mutual inductance 5. Switched reluctance motor concept, control and applications. Motor runs at slip speed reluctance torque, trel reluctance torque, trel maximum reluctance torque, trelmax occurs at. To develop positive torque, the currents in the phases of a srm must be to the rotor position.
Van duijn, development of methods, algorithms and soft wares for optimal design of switched reluctance drives 2 f. Reluctance motor subtypes include synchronous, variable, switched and variable stepping. This greatly simplifies mechanical design as power does not have to be delivered to a moving part, but it complicates the electrical design as. Motor phase inductance and current against the rotor position the constants k1, k2, k3 and. Switched reluctance motor 43768 introduction the reluctance motor is an electric motor in which torque is produced by the tendency of its moveable part to move to a position where the inductance of the excited winding is maximized. Comprehensive analysis of novel threephase 1210 switched. Here we will discuss construction and working principle of reluctance motor. The paper also introduced why the asymmetric bridge converter type is the best one especially for high speeds. In the specific srm model, the magnetization characteristic of the motor is provided in a lookup table. Development strategy of rao ues russia main purposes and stages of the project. The reasons deal primarily with controller and power switching components. Set to 64 default to specify a threephase 64 motor set to 86 to specify a fourphase 86 motor set to 108 to specify a fivephase 108 motor set to 64 60 kw preset model, 86 75 kw preset model, or 108 10 kw preset model to use a predetermined specific model of a switched reluctance motor. Inductance profile of lsrm the ideal inductance profile according to translator position of the designed motor has. In this paper, the switchedreluctance motor uses an electronic position sensor to determine the angle of the rotor shaft and solid state electronics to switch the stator windings, which also offers the opportunity for dynamic control of pulse.
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