The stator is made up of silicon steel stampings with inward projected poles. With continued research, different topologies have emerged presenting less torque ripple, high efficiency, high. To achieve this a suitable theoretical model is essential, thus a simple but complete motor model is developed. Switched reluctance generator modeling, design citeseerx. The statorpole pairs are sequentially excited using a rotor position encoder for timing. Electrical drives structure of electric power plants. On the other hand a switched reluctance motor is used in variable speed drives and naturally designed to operate efficiently for wide range of speed and torque and requires rotor position sensing. Pdf this paper presents a fivephase switched reluctance motor designed to satisfy the requirements of flap actuators in medium. Switched reluctance drive, switched reluctance motor. This means, the rotor always tries to align along the lowest reluctance path.
Switched reluctance motor concept, control and applications2. This is an experimental switched reluctance motor which uses only external electromagnets in the stator, and no windings or permanent magnets in the rotor. Here we will discuss construction and working principle of reluctance motor. Sr motors require precise control to optimise the operating efficiency. A switched reluctance motor srm is an electric motor in. The reluctance motor has basically two main parts called stator and rotor. Special electrical machines question bank ee8005 pdf free download. Pdf efficiency analysis of synchronous reluctance motors. A reluctance motor is a type of electric motor that induces nonpermanent magnetic poles on the ferromagnetic rotor. Unlike common dc motor types, power is delivered to windings in the stator case. The converter is able to free wheel during the chopping period at low speeds.
Reluctance motors an induction motor with a modified squirrelcage rotor. Switched reluctance motor for electrical drives offor electrical drives electric power plants equipment vladimir kuzmichev mpeitu, orgres. Srm differs from dc motor in that mechanical motion is produced by stator windings instead of the rotor, as in the case of dc motors. Pdf books download book switched reluctance motor drives by r.
Referring to the drawings, a switched reluctance motor m see figs. Reluctance motor subtypes include synchronous, variable, switched and variable stepping. Btl 1 remember co3 3 illustrate the different modes of operation of switched. The operation of reluctance motor with diagram blogger. 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. The rotor is created from lamination in order to minimize the eddycurrent losses. Switched reluctance motor drives study material download. In observing the drives waveforms, we can remark that the srm operation speed range can be divided into two regions according to the converter. In the last years, the switched reluctance machines srms have been the subject of significant developments.
Switched reluctance motor drives modeling simulation. Principle of operation of switched reluctance motor. To develop positive torque, the currents in the phases of a srm must be to the rotor position. The recent surge of activity since the 1980s has spurred university and industrial research and product development in the u. The switched reluctance motor srm is a type of stepper motor, an electric motor that runs by reluctance torque. May 15, 2017 the switched reluctance motor srm is a type of a stepper motor, an electric motor that runs by reluctance torque. This doubly salient arrangement is very effective for electromagnetic energy conversion. Construction of switched reluctance motor variable. Switched reluctance motor the switched reluctance motor. This work focuses on developing of a new robust design control for switched reluctance motor drives for electrical vehicle to attenuate the effect of disturbances and parameter uncertainties.
Btl 1 remember co3 2 list out the advantages of switched reluctance motors. Unlike common dc motor types, power is delivered to. A reluctance motor is a type of electric motor that induces nonpermanent magnetic poles on. The drive works in all for quadrants and was designed for applications with highest demands for dynamics, constant torque, low noise and highest power output. Electric drives brushless dc ac and reluctance motors description and applications brushless motors. The switched reluctance motor srm, a stepper motor powered by reluctance power, is a motor which runs on electricity. The operation of reluctance motor with diagram a media to. Abdelaliem shoubra faculty of engineering, cairo, egypt.
Industrial interest in switched reluctance motor srm drives has varied since 1850s. Motor runs at slip speed reluctance torque, trel reluctance torque, trel maximum reluctance torque, trelmax occurs at. The change in phase resistance during motor operation due to its. The torque production in the switched reluctance motor can be explained using the. Scribd is the worlds largest social reading and publishing site.
The following figure shows the ideal waveforms phase a inductance and current in a 64 srm. Fuzzylogic has been used as an intelligent method by m. Switched reluctance motor the switched reluctance motor srm is a type of stepper motor, an electric motor that runs by reluctance torque. Reluctance motor technical seminar report annual year 2014, electrical and electronics department, sdmt, ujire574240 page 6 2. Jun 16, 2018 switched reluctance motor srm is also known as variable reluctance motor. Reluctance motors can deliver high power density at. Principle of operation of switched reluctance motor engineering essay. Pdf a switchedreluctance motor for aerospace application. Switched reluctance generators srg running the engine at variable speed and using power electronics to convert the variable frequency to a fixed voltage and frequency can allow more efficient operation of the genset. Each chapter, written by engineers expert in that particular area, addresses a different aspect of the sr machine. The drive waveform is composed of one or more harmonics to be used to match the reluctance pattern of the statorrotor, causing the rotor to rotate due to the reluctance effect, and one or more other harmonics to induce current in the rotor, causing the rotor. Switched reluctance motor when operated as generator is proved to be a real alternative to conventional variable speed drives in many applications, especially. If one end of each 3phase winding of the switched reluctance motor is brought out via a common lead wire, we can explain operation as if it were a stepper motor. Switched reluctance motorgenerator technology kaskod.
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. During free wheeling periods, negative voltage is applied to the windings and the stored energy is returned to the power dc source through the diodes. Studying different types of power converters fed switched. Therefore, the effect of mutual coupling should be analyzed to. This paper treats the operation of a high torque srdrive for low.
Switched reluctance motorswitched reluctance motor operation. College of engineering, bangalore, india, 560059 email. Us5461295a noise reduction in a switched reluctance. Us5461295a noise reduction in a switched reluctance motor. Unlike common dc motor types, power is delivered to windings in the stator case rather than the rotor. Switched reluctance m otor design using an sys maxwell. Within this range, its efficiency and its dynamic is very high wo1. Switched reluctance motor construction and working. The stator has a laminated construction, made up of stampings. Book switched reluctance motor drives pdf download m.
Actually, the machine becomes a synchronous reluctance machine, the main idea for its operation is a rotating magnetic field, which does not. The fall time of the currents in motor windings can be thus reduced. Electric drives brushless dc and reluctance motors. Studying different types of power converters fed switched reluctance motor. This article deals with proceduresteps to design switched reluctance motor using ansys maxwell. Model the dynamics of switched reluctance motor simulink. Ee6703 special electrical machines syllabus regulation 20. Download switched reluctance motor drives modeling simulation analysis design and applications easily in pdf format for free.
This greatly simplifies mechanical design as power does not have to be delivered to a moving part, but it complicates the. The stampings are slotted on its periphery to carry the winding called stator winding. It provides an overview of the use of electric motors in the industrial, residential, commercial, and transportation sectors. Switched reluctance motorgenerator technology the switched reluctance machine was the first electric motor to have been designed but until the recent two decades hasnt been successfully implemented. A novel solution for variable speed operations of switched. Switched reluctance motor concept, control and applications. In particular, the switched reluctance sr motor drive can achieve most of these goals. Sample ee8005 question bank special electrical machines. Switched reluctance motor drives modeling simulation analysis. Switched reluctance motor modes of operation converter. As the name suggests, a switching inverter is required for the operation of switched reluctance motor. Because of its dependence on a power converter for its operation, this motor is. Krishnan written the book namely switched reluctance motor drives author r.
Us7852037b2 induction and switched reluctance motor. A free powerpoint ppt presentation displayed as a flash slide show on id. We know about different types of synchronous motors, apart from all these motor works based on reluctance. A novel solution for variable speed operations of switched reluctance motors abhinav a.
This motor works on the principle of variable reluctance. 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 stator winding is comprised of a set of coils, each of which is wound on one pole. Examples of such motors are a 126, 2phase motor, or a 64, 3phase motor.
Development strategy of rao ues russia main purposes and stages of the project. The rotor does not contained any windings or conductors within it. It works on the same principle as for stepper motor. In the light of above it is a competitive motor variable speed dc motor and variable speed 3 phase cage induction motor. Switched reluctance motor srm is gaining much interest in industrial applications such as wind energy systems and. 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. Brushless motors such as permanent magnet and switched reluctance motors depend on electronic drive systems which produce rotating magnetic fields to pull the rotors around. Similarly in the reluctance motor, rotor tries to align itself with the axis of rotating magnetic field in a minimum reluctance position. To impart knowledge on construction, principle of operation and performance of synchronous reluctance motors. Theyll give your presentations a professional, memorable appearance the kind of sophisticated look that todays audiences expect.
Switched reluctance motorswitched reluctance motor. Variable reluctance motor, oversimplified operation. Ee6703 special electrical machines syllabus regulation 20 anna university free download. Pdf design of switched reluctance motor using ansys maxwell. Switched reluctance motor srm is also known as variable reluctance motor.
Ee8005 question bank special electrical machines regulation 2017. This thesis presents a design method for a switched reluctance sr motor to optimise torque production for two types of 3 phase 64 poles srm and 86 poles srm designs. Basically its kind of a stepper motor which rotates through a step angle when. By using a position sensor attached to the rotor, the turnon and turnoff angles of the motor phases can be accurately imposed. Introduction first time reluctance motors is mostly used by davidson as a traction drive for an electric. Construction and operation of srmswitched reluctance motor. 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.
The article is devoted to the comparative research of performances of controlled drives with a synchronous reluctance motor synrm and with an induction motor im in a pump application. The magnetic flux seeks the path of least reluctance. Unlike a conventional synchronous motor, both the rotor and stator of a switched reluctance motor have salient poles. Below are an oversimplified rotor and waveforms that illustrate operation. The switched reluctance motor srm is an electric motor which operates on reluctance torque. Switched reluctance motor for electrical drives offor. Speed robust design of switched reluctance motor for. With advanced fuel or diesel engines and variable speed technology. Synchronous reluctance machine design 1 1 introduction the purpose of this report is to present information necessary for developing a suitable synchronous reluctance motor synrm rotor geometry design procedure. Winner of the standing ovation award for best powerpoint templates from presentations magazine. The nominal speed of the test switched reluctance motors is 1500 revolutions per minute. Construction details of switched reluctance motor with six stator poles and four.
Ppt of srm free download as powerpoint presentation. Construction details of switched reluctance motor with six stator poles and four rotor poles can be explained by referring to figure 3. Switched reluctance motor drives for hybrid electric vehicles. Worlds best powerpoint templates crystalgraphics offers more powerpoint templates than anyone else in the world, with over 4 million to choose from. Special electrical machines ee6703 syllabus free pdf download. Fundamentals to applications is a comprehensive textbook covering the major aspects of switched reluctance motor drives. Jan 02, 2018 switched reluctance motor the switched reluctance motor srm is a type of stepper motor, an electric motor that runs by reluctance torque. In fact, electrical drives for aircraft application must. This application describes a motor designed to operate as a reluctance machine at low speeds and as an induction machine at high speeds. Speed robust design of switched reluctance motor for electric. Switched reluctance motor srm free download as powerpoint presentation. Electronic control of switched reluctance machines newnes. It may also be noted that the switched reluctance motor is quite different from the synchronous reluctance motor. For this, we have adopted the cascade control architecture velocitytorque using two different h.
1009 612 470 87 48 407 435 145 992 1258 511 295 243 21 1275 908 1154 642 1211 1201 1460 896 283 1268 681 169 973 643 200 340 825 685 25 1228 1286 1409