The torque developed by an srm is dependent on the change of fluxlinkage and rotor position. Reluctance motor subtypes include synchronous, variable, switched and variable stepping. A rotarylinear switched reluctance motor for advanced. A switched reluctance motor is an electric motor in which the torque. The robust construction, low manufacturing and maintenance cost, less thermal problem, good fault tolerance capability and high reliability in harsh environments make it attractive alternative in the application of active suspension systems 4. Linear hybrid reluctance motor with high density force mdpi. The actuator under study is a double sided linear switched reluctance motor composed by a toothed sliding. Simulation of linear switched reluctance motor drives. This paper introduces a design procedure as well as an experimental and analytical investigation for linear switched reluctance motor lsrm. In the present work, the linear model has been considered for the development of inductance profile for switched reluctance motor.
The numerous advantages of the srm make it an attractive solution. The stator has a modular design compound of three correctly shifted usual 16 poles srm stators. Keywords linear switched reluctance machines, finite element analysis, machine design, and sensitivity analysis. The objectives of the project were to design the motor and to determine its performance under ac and dc supply. Download switched reluctance motor drives modeling simulation analysis design and applications easily in pdf format for free. The linear versions of it, possessing similar attributes.
The srm motor has double salient structure makes its magnetic characteristics highly nonlinear. The flux linkage characteristic of the motor is required to make the control circuit. In the paper a switched reluctance rotary linear motor is proposed. Pdf design, modeling and analysis of linear switched. A comparison of the motor performance operating under ac and dc supply is presented. The stator of the motor has the main and auxiliary winding. The motor is able to ensure both rotating and linear.
An output equation is developed considering the 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. Because of similar structure and operation principles, the linear switched reluctance motor lsrm has all advantages of rotary switched reluctance motor. There are no windings or permanent magnets on the rotor. 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. It is mainly due to frequent switching of phases for rotation of the motor. There has been an increasing interest in the switched reluctance motor srm drives recently. Position measurement and control of a thin and compact. Pdf this paper introduces a design procedure as well as an experimental and analytical investigation for linear switched reluctance motor lsrm. 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. The reluctance motor has basically two main parts called stator and rotor. A novel double sided linear switched reluctance motor. The rotor is constructed of several common 12 poles srm rotor stacks. Simulation and testing of a switched reluctance motor by.
An lsrm has a doubly salient magnetic circuit with a polyphase winding on the armature. Electric drives brushless dc ac and reluctance motors description and applications brushless motors. Even for the simplest case in the linear flux region, the electrical torque is not a linear function of the stator current as stated by miller et al 1980. However, switched reluctance motors are not used so far in submersible underwater motor for agriculture purposee. Assessment of linear switched reluctance motors design. Pdf linear switched reluctance motor design and performance. Numerical and analytical modeling of switched reluctance. Linear motors are presented in the bibliographies with various topologies which can be classified as tubular or flat geometry, long or short stator.
Due to the high advantages of the stlsrm, electromagnetic modelling of this motor is considered. On the control of a rotarylinear switched reluctance motor. Motor was controlled more accurate with linear incremental encoder by sensing acceleration and movement direction of door. Magnetic circuit analysis of a linear switched reluctance. Comparative design and modeling study of single sided. It is mechanically robust, simple to construct and easy to operate also in hostile industrial and automotive. Industrial interest in switched reluctance motor srm drives has varied since 1850s. Design and calculation of 75w threephase linear switched. Nonlinear modeling of a switched reluctance motor using. Design of linear switched reluctance motor driver for. Linear switched reluctance motor lsrm is one of the linear motors that can be used in such drives.
Linear switched reluctance motor lsrm is a type of direct drive motors. Abstractin this study, a buck converter and a driver has been designed for linear switched reluctance motor. Linear switched reluctance motor lsrm drives are investigated and proved as an alternative actuator for vertical linear transportation applications such as a linear elevator. In this study a driver has been designed for linear switched reluctance motor lsrm with 64 poles, 3 phases, 250w. In the paper a switched reluctance rotary linear motor is proposed and investigated.
The rotor of a reluctance motor is a squirrel cage with some rotor teeth removed in the certain places to provide the desired number of. This greatly simplifies mechanical design as power does not have to be delivered to a moving part, but it complicates the. 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. The rotor is basically a piece of laminated steel and its shape forms salient poles. The sr motor produces torque through the magnetic attraction which occurs between stator electromagnets and a corresponding set of salient poles formed on a simple rotor made only of ferromagnetic material. Due to its specific movement the motor requires also particular bearings. In contrast, linear switched reluctance motors lsrms are free from the problems caused by pms. This paper presents the comparison study between two design method of a single sided linear planner switched reluctance motor lpsrm with an a translator and a passive stator.
Characteristics and work principles of switched reluctance sr motor photo credit. Nonlinear modeling of a switched reluctance motor using lssvm abc 144 flux linkage characteristics and torque characteristics are highly nonlinear and dependent on the rotor position and phase current 1. The switched reluctance motor srm drive demands that the motor and converter to be considered as one unit. Ee6703 unit 3 switched reluctance motors srm 1 prepared by. The recent surge of activity since the 1980s has spurred university and industrial research and product development in the u. Design of a linear switched reluctance machine ieee xplore. Commutating switched reluctance motors with pmac 3 phase referencing as a synchronous motor, the phase position information for an sr motor must have an absolute reference. Unlike common dc motor types, power is delivered to windings in the stator case rather than the rotor. A linear motor was proposed in that is based on an lsrm. Reluctance motors can deliver high power density at. Also, segmental translator lsrm stlsrm has the capability to produce higher output powerweight when it is compared with the conventional lsrm. This paper is devoted to the simulation of the whole lsrm drive, including the linear motor, the power converter and the control.
Introducing linear switched reluctance motor with segmental translator, two different topologies for this motor titled the fullpitched stlsrm and the shortpitched stlsrm were described. Analysis of performance of singlephase reluctance linear. Lsrm controlled by pic 18f452 microcontroller was used to drive automatic door. Also linear motor can be with double or single sided, active or passive stator. Faiz abstract the generated torque ripple in switched reluctance motors srm can be considered as one of the major disadvantages of the motor. Reluctance motor a single phase synchronous reluctance motor is basically the same as the single cage type induction motor. Linear switched reluctance machine drives with electromagnetic levitation and guidance systems by byeongseok lee dissertation submitted to the faculty of the virginia polytechnic institute and state university in partial fulfillment of the requirements for the degree of doctor of philosophy in the bradley department of electrical and computer. One of the applications of these motors is in electric trains and subways. Many papers have dealt with modeling and simulation switched reluctance motor drives 68 but, until now, little work has been done in their linear counterpart. Linear switched reluctance motor lsrm is an srm of unrolling stator and rotor into a plane.
Switched reluctance motors have been extensively studied by researchers for their unparalleled advantages in wide range of applications. Us20150220484a1 memristor linear modeling method for. The work presents a lsrm complete design by 2d finite element analysis method 2d fea and rotary to linear conversion method design. The linear motor does not include pms and is therefore free from the. It is mechanically robust, simple to construct and easy to operate also in hostile working environment.
Switched reluctance motors have been extensively studied by researchers for their unparalleled advantages in many applications. The proposed switched reluctance rotary linear motor practically combines three identical rotating motors with a linear one. The lumped parameter magnetic analysis proposed can be a useful tool for designing linear switched reluctance machines. This paper aims electroto investigate, develop and fabricate a directdrive. The proposed simulation model of the switched reluctance motor for its linear inductance profile is instigated. Electric drives brushless dc and reluctance motors. A noninverting operational amplifier circuit and an inverting operational amplifier circuit are employed to construct a switched reluctance motor linear phase inductance characteristic element. Simulation and testing of a switched reluctance motor by matlab simulink and dspace saman abbasian department of energy and environment faculty of electric power engineering chalmers university of technology the main objective of this thesis is to build and test a srm drive system to provide a research platform.
We know about different types of synchronous motors, apart from all these motor works based on reluctance. A rotarylinear switched reluctance motor for automotive. Usually the linear motion is generated by belt or spindle drives using rotational motors. The switched reluctance motor srm is a type of stepper motor, an electric motor that runs by reluctance torque. Lsrms are an attractive alternative due to lack of windings on either the stator or translator structure.
Translations are the most common motions in several industrial branches. The model is based on lumped parameters and it takes into account the leakage pole flux and the end effects. The design and mathematical modeling of a linear switched reluctance motor suitable for ground transit applications is presented in this paper. Here we will discuss construction and working principle of reluctance motor. Analytical modelling of the linear switched reluctance. It may also be noted that the switched reluctance motor is quite different from the synchronous reluctance motor. Even for the simplest case in the linear flux region, the electrical torque is not a linear function of the stator current as stated by miller et al. Design and analysis of a double sided linear switched reluctance. All simulations are completely documented by their block diagrams and corresponding matlab functions. A memristor linear modeling method for a switched reluctance motor. The stator of the single phase reluctance and induction motor are same. Switched reluctance motor modes of operation converter. The design and mathematical modeling of a linear switched. It can be used in precise two degrees of freedom motion control systems, as pick and place equipment, robotics, instrumentation, automotive applications, etc.
A reluctance motor is a type of electric motor that induces nonpermanent magnetic poles on the ferromagnetic rotor. Numerical and analytical modeling of switched reluctance machines zhang zhihui and li yuren northwestern polytechnical university, xian, china email. Design, modeling and analysis of linear switched reluctance. Applying the electromagnetic simulation model to a proposed threephase linear switched reluctance motor, the simulation results are presented. Elasticity and backlash are the problems that hinder the accuracy of such. One common problem in trying to use an sr motor as a positioning motor is the non linear torquecurrent relationships. Switched reluctance motor srm the switched reluctance motor srm is a type of motor doubly salient with phase coils mounted around diametrically opposite stator poles.
As an example, linear switched reluctance motors lsrm and linear permanent magnet synchronous motors lpmsms have been proposed for. Analysis and modeling of different topologies for linear. A onetenth scaled prototype elevator focused on a home elevator with lsrms is designed and extensive experimental correlation is presented for the first time. Design and control of a ropeless elevator with linear. A matlabsimulinksrdas environment to simulate a 64 switched reluctance motor is presented in this paper.
Linear switched reluctance motor, finite element analysis, automatic door driver, elevator door. Switched reluctance motor drives modeling simulation. Pdf switched reluctance motors have been extensively studied by researchers for their unparalleled advantages in wide range of. Application of linear switched reluctance motor for active.
There is an increasing interest in direct drive systems with continual development of power electronics and control strategies. Characteristics and work principles of switched reluctance. A new linear switched reluctance motor with maglev effect. The developed simulation model results were compared with srdas software. Lsrms are mostly used in the field of directdrive linear motion systems.