In the present work performance of current gradient sensorless method cgsm of switched reluctance motor is examined. Electronic control of switched reluctance machines newnes. A sensorless control scheme for the switched reluctance motor srm drive at low speed is presented in this paper. Sensorless control of switched reluctance drives department. In the last years, the switched reluctance machines srms have been the subject of significant developments.
The bldc motor control consists of generating dc currents in the motor phases. Sensorless speed control of switched reluctance motor drive. The back emf is trapezoidal in the bldc motor case and sinusoidal in the pmsm motor case. Us6801012b1 sensorless control of switched reluctance. The currents can be determined by one common measurement.
Consequently, it is not necessary to put a current sensor on each phase of the motor. Dualrotor layouts provide more torque at lower price per volume or per mass. Sensorless speed control of switched reluctance motor. Pdf artificial neural networks applied to sensorless. Inductance based sensorless control of switched reluctance. An adaptive online fluxlinkage estimation method for the sensorless control of switched reluctance motor srm drive is presented in this paper. Under the environment of matlabsimulink, the method realizes the sensorless control of the switched reluctance motor. Neural networks nns have proven to be useful in approximating nonlinear systems and in many applications, including motion control.
Sensorless control, switched reluctance motor srm, binary observer. Sensorless control of switched reluctance motor based on anfis. Sensorless control of switched reluctance machine based on. The accurate rotor position information is very important for high performance operation of switched reluctance motor srm. In this paper, an algorithm for sensorless control of a four phase switched reluctance motor is represented. Visinka 3phase switched reluctance sr sensorless motor control using a 56f80x, 56f8100 or 56f8300 device, freescale semiconductor application note an 1932, rev 22005 l. Pdf sensorless commutation control of switched reluctance. Sensorless rotor position estimation for switch reluctance.
A new sensorless control for switched reluctance motor. 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. Sensorless control of switched reluctance motor based on. Position sensorless control of switched reluctance motor. Fundamentals to applications is a comprehensive textbook covering the major aspects of switched reluctance motor drives. Simulation and experimental verification of the observer based method confirm very good estimation of the rotor position and speed estimation of the srm. Position sensorless control of switched reluctance motor drives based on numerical method fei peng, member, ieee,jinye, senior member, ieee, ali emadi, fellow, ieee, and yunkai huang abstractin this paper, a new position sensorless control method for switched reluctance motor drives is proposed. Sensorless trapezoidal control of bldc motors drv8312evm. A switched reluctance sr or variable reluctance motor does not contain any permanent magnets. Velocitysensorless tracking control and identification of.
In this paper, a brain emotional learning based intelligent controller belbic is developed to control the switched reluctance motor srm speed. Modern motor control applications and trends tomas krecek. The pc master software referenced in this document is also known as free master software. A new sensorless method for switched reluctance motor drives gabriel gallegosl. Sensorless control for switched reluctance motor based on. A switched reluctance motor srm is a viable candidate for various motor control applications due to its rugged and robust construction. The switched reluctance motor has both salient pole stator and rotor, like variable reluctance motor nazar 1969, but they are designed for different applications, and therefore, with different performance requirements. Fluxcurrent method under the sensorless scheme will with phasel will not. In this study, the single and 2phase srms were considered as good candidates for highspeed and lowcost applications. Traditionally, there is a mechanical rotor position sensor. Ichikawa, tomita, doki, and okuma present sensorless control of synchronous reluctance motors. By using a position sensor attached to the rotor, the turnon and turnoff angles of the motor phases can be accurately imposed. Keywords switched reluctance motor, sensorless detect, the simplified flux method, the turnon and turnoff simplified flux method, control. A nonlinear model of srm is simulated in matlabsimulink.
Sensorless control of a four phase switched reluctance. A new sensorless control for switched reluctance motor abstract. Therefore, position sensorless control becomes a promising technique for srm. Theoretically justified the increase of noise level while sensorless srm control. It has wound field coils of a dc motor for its stator windings and has no coils or magnets on its rotor. A characteristic of the bldc control is to have only one current at a time in the motor two phases on. It provides an overview of the use of electric motors in the industrial, residential, commercial, and transportation sectors.
This leads to a lowcost and extremely robust construction, which gives the motor the capability to be operated at ultrahigh speeds and in harsh. Switched reluctance motors have steadily increased in commercial importance since their introduction in the early 1980s. The paper deals with sensorless control of a switched reluctance motor srm. This application note presents a solution for sensorless control of brushless dc motors using the tms320f2803x microcontrollers. The method includes the step of measuring, at a predetermined frequency, the time required for a current in the motor to rise or fall between predetermined current levels to thereby obtain a plurality of sample rise or fall times. Request pdf sensorless control of the switched reluctance motor currently, the switched reluctance motor is recognized as a performing engine, due to its high reliability, robustness and low. Sensorless control of switched reluctance motor using. Due to the nonlinear electrical characteristics of switched reluctance motors, artificial neural networks perform a good tool and for torque ripple minimization in switched reluctance motors. Pdf this paper addresses control of commutation of switched reluctance sr motor without the use of a physical position detector. Pdf sensorless control of switched reluctance motor. Pdf analysis of current gradient sensorless method of. Liu, lin, and yang propose a nonlinear controller for a synchronous reluctance drive with reduced switching frequency 30. Some disadvantages are torque ripple and high noise.
Although there exist some works on sensorless control of switched. 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 concept, control and applications. Sensorless control for srm based on special position detection. Sensorless control of switched reluctance motor drive with fuzzy logic based rotor position estimation abstract this paper describes an accurate rotor position estimation, which is very important for high performance operation of switched reluctance motor srm. The phase inductance regularly varies with the rotor position and increases as the rotor and stator poles are. Sensorless control of switched reluctance motor drive with fuzzy logic based rotor position estimation article pdf available in international journal of computer applications 122 february. Our main results guarantee velocity tracking control for velocity references with constant reference acceleration under the assumption that the load torque, the rotor inertia, the resistance and inductances are unknown. Sr motors require precise control to optimise the operating efficiency. It definitely has to use the nonlinear model of the switched reluctance motor. Xu 2001 proposed eliminating starting hesitation for reliable sensorless control of switched reluctance motors.
Speed control of switched reluctance motor with torque. Pdf sensorless commutation control of switched reluctance motor. With advanced fuel or diesel engines and variable speed technology. In order to overcome the disadvantage of mechanical rotor position sensor. For their operation the excitation unit which is controlled in accordance with the rotor angle position is nec essary. Switched reluctance machines require special control techniques and different inverter topology. Sensorless control of single switch based switched reluctance motor drive using neural network abstract. The incremental inductance of each active phase is estimated using the terminal.
Sensorless control of a switched reluctance motor by using. Model of switched reluctance motor for utilization in sensorless control of electric drive pavel brandstetter1, martin kuchar1 and petr krna1 1vsb technical university of ostrava, department of electronics, czech republic abstract. The switched reluctance motors have several merits over other motors. Switched reluctance motor modes of operation converter. This paper presents a system for position sensorless control of a switched reluctance motor srm that has mutualinductance. This paper describes an accurate rotor position estimation, which isvery important for high performance operation of switchedreluctance motor srm. Introduction the application of switched reluctance motor srm emerged in the 1980s in industry, the switched reluctance motor drive system srd as a new type of speed.
Introduction the sensorless speed control and the estimation of the rotor position have already been treated in several publications. Sensorless control of switched reluctance machine based on nonlinear observer and fuzzy logic controller m. Sensorless control of the switched reluctance motor. Summary in this paper, we address the problem of state observation for sensorless control of switched reluctance motors srms, that is, the.
The classical fluxcurrent approach is adopted for estimating. Us60168a sensorless detection of a locked rotor in a. A new sensorless control scheme for switched reluctance motor is proposed. Page 1152 sensorless control of a switched reluctance motor by using sliding mode observer m. In this thesis, a new position sensorless control method for srm is proposed to estimate rotor position and speed.
A stepper motor is designed to make it suitable for open loop position and speed control in lower applications, where. Pdf sensorless control of switched reluctance motor drive with. The most interesting peripherals for switched reluctance motor control are the fast analogtodigital converter. A method and circuit for detecting a locked rotor in a switched reluctance motor are provided. The proposed srm is designed to replace a universal motor that equipped with the blender. But this reduces the reliability and increases cost and size of srm.
Model of switched reluctance motor for utilization in. Sensorless commutation control of switched reluctance motor. This switching angle can be used to control the developed torque waveforms. Miller gave a brief introduction of the different aspects of the motor and its controller in his above mentioned book in a textbook form. Fluxcurrent method the procedure for the sensorless estimation of rotor position and speed must be suitable for the test drive with 18,5kw, 118nm and 1500r. The only difference between them is the shape of the induced voltage, resulting from two different manners of wiring the stator coils. Ac synchronous motors, stepper motors, switched reluctance motors, ac induction motors the bldc motor is conventionally defined as a permanent. Sensorless control of switched reluctance motor based on fractional step freewheeling methods. Pdf sensorless control of switched reluctance motor based. Bu, position transducerless control of a switched reluctance motor. Switched reluctance motor srm the switched reluctance motor was designed for use in high power, high efficiency, variable speed drives.
The tradeoff for this lowcost construction is a more complex drive with more switches and complex control techniques to achieve a smooth torque operation. Also speed control of switched reluctance motor was obtained by other artificial intelligence methods such as fuzzy logic controller, fuzzy pi controller and particle swarm. The paper deals with a model of a switched reluctance motor srm that can be used for the. Both operations are realized through the three phase inverter depicted in the following scheme.
The speed control of a switch reluctance motor srm using feedback control method with the help of a proportional integral pi controller is presented in this paper. Sensorless control of switched reluctance drives the switched reluctance motor srm has concentrated stator windings and a rotor which does not have windings nor permanent magnets, see figure 1. The rotor position of an srm is estimated by substituting a differential value of sampled current differential current into the motor model. Foc for pmsm, im and syrm synchronous reluctance motor is shown as state of the art alternative to simple control methods. Switched reluctance sr variable motor microchip technology. The sensorless method is suitable for medium and highspeed operation.
Sensorless speed control of 64pole switched reluctance. The few theoretically validated results in the literature are established under more stringent conditions such as knowledge of the load torque. This paper presents the sensorless speed control of 64 pole srm drive based on hybrid observer ho. The sr motor control application utilizes the pwm module set in the independent pwm mode, permitting fully independent generation of control signals for all switches of the power stage. Miller, fellow, ieee abstract this paper describes a new method for indirect sensing of the rotor position in switched reluctance motors srms using pulsewidth modulation voltage. Electronic control of switched reluctance machines newnes power engineering series miller, tje on. We present a solution to the velocity sensorless control problem for switched reluctance motors under parametric uncertainty. This work analyzes the advantages of artificial neural networks applied to sensorless control for switched reluctance motors. Index termsposition sensorless control, numerical method, phase locked loop, switched reluctance motor srm. Abstracta new sensorless control method based on phase inductance vectors of switched reluctance motor srm is presented in this paper. In this paper, we address the problem of state observation for sensorless control of switched reluctance motors srms, that is, the regulation of the motor measuring only the voltage and the current of the electrical supply.
Switched reluctance motors have gained momentum in the highly competitive market of adjustable speed motor drives. Tms320f280x devices are part of the family of c2000 microcontrollers. Sensorless control of switched reluctance motor drive. An effective and reliable means of generating commutation signals of an sr motor based on inductance profile of its stator windings determined using active probing technique is presented. This paper presents the design and control of a highspeed 2phase 42 switched reluctance motors srm for blender application. Electric drives brushless dc and reluctance motors. Pdf currently, the switched reluctance motor is recognized as a performing engine, due to its high reliability, robustness and low cost in this. Sensorless speed control of switched reluctance motor drive using the binary observer with online fluxlinkage estimation.
Optim, switched reluctance motor, sensorless speed control, estimation of rotor position 1. Pdf this paper describes an accurate rotor position estimation, which isvery important for high performance operation of switchedreluctance motor. This control is subdivided into two independent operations. Design and control of a high speed 2phase 42 switched. The sliding mode observer is used for the speed estimation of the srm. The influence of the switched reluctance motor drive sensorless control on the level of its noise is considered. Inductance based sensorless control of switched reluctance motor. Like other intelligent controllers, belbic is model free and is suitable to control nonlinear systems. Elimination of position sensor has become a popular topic of switched reluctance motors. This paper describes a new rotor position sensorless control method for switched reluctance motor srm drives based on the variation of an active phase inductance. A sensorless srm suitable to drive the srm based on the position of a rotor detected through the detection of the variation of the current of each phase without providing separate sensors for identifying the position of the rotor includes a motor driving part for driving the motor by exciting phases of the motor in a predetermined sequence, a differentiating part for differentiating the. Ho is simulated from low to high speed level, and also estimated position and speed errors. The research effort is in realizing an economical sensorless sr rotor position detector that is accurate, reliable and robust to suit a particular application.
Inductance based sensorless control of switched reluctance motor 89 reduced. Also the topology of 2 and 3levelinverter is shown with the corresponding benefits. Authors use the concept of fuzzy logic for rotor position estimation in sensorless control of srm drive. Introduction the application of switched reluctance motor srm emerged in the 1980s in industry, the switched reluctance motor drive system srd as a new type of speed regulation drive system. The switched reluctance motor drives have several advantages, e. The variable reluctance motor is an evolution of the stepping motor and is generally designed for use in low power, open loop position and speed control systems where efficiency is not of prime importance. Hitherto, nns advocated in switched reluctance motor srm control have a large number of neurons in the. Introduction switched reluctance motor srm is an attractive candidate to variable speed drive applications. Major issues of cgsm associated with design, implementation and performance are investigated.
This paper describes an accurate rotor position estimation, which is very important for high performance operation of switched reluctance motor srm. This invention relates to sensorless operation of a switched reluctance electric machine. Ibrahim 2008 presented a rotor position which is based on a phasebyphase basis and measuring the flux linkage and current when the estimated position is reached. Adaptive state observers for sensorless control of switched. Sliding mode observer is adopted at high speed and pulse. 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. The reluctance motor is a type of synchronous machine. Unlike a conventional synchronous motor, both the rotor and stator of a switched reluctance motor have salient poles. Pdf sensorless control of switched reluctance motor drive.