A synchronous permanent magnet linear motor 8 comprising an armature 76 formed by. Precision motion control of permanent magnet linear. Permanent magnet motor an overview sciencedirect topics. On the basis of analyzing structure trait and operational principle of linear motor, a position servo control system of linear motor based on dsp is designed. The motor is fed with an alternating voltage conveniently applied to a threephased stator coils which are distributed in the rails that attach the vehicle travel. Permanent magnet linear synchronous motor servo system. A twostep minimization process that depends on the slotting. Optimal design of a permanent magnet linear synchronous. Jp4458238b2 permanent magnet synchronous linear motor.
A pmsm, which stands for permanent magnet synchronous motor, relies on magnets to turn the rotor, which spins at the same speed as the pmsms internal rotating magnetic field. The model of permanent magnet linear synchronous motor pmlsm is complex, and the readymade pmlsm block can not be found in matlab during the process of simulation. Research on permanent magnet linear synchronous motor control. A linear motor is an electric motor that has had its stator and rotor unrolled thus instead of producing a torque it produces a linear force along its length. Subsequently, a fractionalorder slidingmode control fsmc is designed. Actuation principles of permanent magnet synchronous. Development and analysis of interior permanent magnet. Vector control of permanent magnet synchronous motor. Permanent magnet synchronous motors for inverter operation. Traditional analytical optimisation method based on magnetic field with particle swarm optimisation algorithm was introduced to obtain the best combination of motor structure parameters. Permanent magnet synchronous machine model for real time simulation a. Permanent magnet synchronous motor pmsm has better dynamic performance, smaller size and higher efficiency. Hence, in this study, the basic reasons and critical conditions for. Whats the difference between ac induction, permanent magnet, and servomotor technologies.
Detent force analysis and optimization for vertical permanentmagnet linear synchronous motor with fractionalslot windings xiaozhuo xu school of electrical engineering and automation, henan polytechnic university, jiaozuo, p. Research on powerangle characteristics of permanent. Composite feedforward compensation for force ripple in. The aim of this study is to develop an adaptive fuzzy fractionalorder slidingmode control affsmc strategy to control the mover position of a permanent magnet linear synchronous motor pmlsm system. The permanent magnet synchronous linear motor was more and more used in factory automation and numerical control systems because they can be. Owing to its many benefits, including a high power density, high accuracy, and smooth feeding, the permanent magnet linear synchronous motor pmlsm is widely used in many industrial applications. The euv project demands the actuator to operate in a complete vacuum and therefore a socalled synchronous permanent magnet planar motor is proposed to replace the existing actuator con. Pdf research on permanent magnet linear synchronous motor. Optimal design of permanent magnet linear synchronous. However, linear motors are not necessarily straight. Permanent magnet motors can be very efficient as the rotor losses are. Permanent magnet synchronous motors pmsm are typically used for highperformance and highefficiency motor drives. Fivephase permanent magnet linear synchronous motors.
Design of the permanent magnet linear synchronous motor for high thrust and low cogging force performance nur a. Pdf investigation of an ironless permanent magnet linear. Model of a permanent magnet synchronous linear motor for. Modeling and simulation of permanent magnet synchronous. Development and analysis of interior permanent magnet synchronous motor with field excitation structure seong taek lee university of tennessee knoxville this dissertation is brought to you for free and open access by the graduate school at trace. Investigation of an ironless permanent magnet linear synchronous motor with cooling system article pdf available in applied sciences 612. In this paper, a technique for reducing the cogging force in slotted permanent magnet linear synchronous motors pmlsms is presented. Magnetic circuit analysis of a linear synchronous motor with. The present invention relates to a permanent magnet type synchronous linear motor. A permanent magnet ac pmac motor is a synchronous motor, meaning that its rotor spins at the same. A permanent magnet linear synchronous motor drive for hts.
This tpmlsm applies axial magnet array topology of the secondary rod, aircored armature windings and slotless structure of the forcer to improve the stability of the thrust. The slider of the motor is integrally attached to the floor of the vehicle to propel. Magnetic field and performance analysis of a tubular. It is caused by magnetic reluctance forces acting mainly in the teeth of the stator, and can be minimized by good motor design, but can still be a problem in sensitive applications.
Advanced bldc motor drive and control stmicroelectronics. This geometry has been proposed for highly salient synchronous machines without permanent magnets. The control scheme proposed in this paper is still at the level of theoretical research. Design of the permanent magnet linear synchronous motor. A comparative study with a sliding mode observer baochao wang, yangrui wang, liguo feng, shanlin jiang, qian wang and jianhui hu. Modeling and design analysis of a permanent magnet linear synchronous generator. Design, analysis and fabrication of a linear permanent magnet. This study focuses on optimisation design of permanent magnet linear synchronous motors that are applied in laser engraving machines with no cutting force.
The topology structure of equivalent magnetic circuit is developed and the permeance. Analysis of direct torque control in permanent magnet synchronous motor drives, ieee transactions on power electronics, 1997. Comparison of linear synchronous and induction motors cdot. The magnetic field for a synchronous machine may be provided by using permanent magnets made of neodymiumboroniron, samariumcobalt, or ferrite on the rotor. In this paper, a nonlinear magnetic equivalent circuit is presented as an analytical solution method for modeling of a permanent magnet linear synchronous motor. Characteristically, a linear motors active section has ends, whereas more conventional motors are arranged as a continuous loop.
The influence of two major dimensions, the pitch and radius of the permanent magnet pm, on magnetic. Permanentmagnet synchronous motor sensorless control. Electric motor electric motor permanentmagnet motors. Research on permanent magnet linear synchronous motor. Research on permanent magnet linear synchronous motor for. Pdf detent force analysis and optimization for vertical. In recent years, with the rapid development of electric power electronics technical, rare earth permanent magnetic materials and the increasingly sophisticated research in permanent magnet motor. A novel elevator door driven by tubular permanent magnet linear synchronous motor tpmlsm is presented. In some motors, these magnets are mounted with adhesive on the surface of the rotor core such that the magnetic field is radially directed across the air gap. However, this topology is not usual and it needs to be suitable for verylow speeds. As a result, the mathematical model of the whole system. Simulation of a permanent magnet synchronous motor using. Detent force analysis and optimization for vertical. This paper investigates the detent force modeling and optimization of a ironcore type 16pole 15slot permanent magnet linear synchronous motor pmlsm for ropeless elevator applications.
In this paper, the permanent magnet linear synchronous motor is used as actuator, and according to the idea of space vector decoupling control, the linear servo control structure is established based on position proportion adjustment and speed ip adjustment. This folder includes code for replicating numerical experiments that are presented in the following technical report. The permanent magnet synchronous linear motor that is a new feed transmission, and it does not use mechanical transmissions. Permanent magnet synchronous motors pmsm are widely used in low and mid power applications such as computer peripheral equipment, robotics, adjustable speed drives and electric vehicles. Permanent magnet motors with active reaction rail 6. Numerical control system based on permanent magnet linear.
A permanent magnet linear synchronous motor control system based on space vector pulse width modulation, caai transactions on intelligent systems, 2009, 43, 251257. The fundamentals of a permanent magnet linear synchronous generator are closely related to magnetic. There are a few key differences between ac induction motors and permanent magnet synchronous motors. It contains an electric circuit, and current is induced in the stator circuit by the moving permanent magnets located on the translator. Permanent magnet linear synchronous motor pmlsm combining the advantages of permanent magnet motor and linear motor, is generally. The stator is the stationary portion of the generator. Motor cable 12 output chockes 12 dudtfilter 12 sine filter 12 motor limits for continuous operation 12 technical explanations adjustable drive systems with permanent magnet synchronous motors 12 special features of the calculation of a controlled drive system with pm synchronous motor what information must be contained in a motor inquiry. Provide rotational power for highenergy applications using permanent magnet motors.
Advanced bldc motor drive and control giovanni tomasello applications engineer. Whats the difference between ac induction, permanent. Thrust for permanent magnet linear synchronous motor. It improves the dynamic sensitivity, accuracy and reliability of modern machining. Consequently, the authors have devised a permanent magnet type linear synchronous motor lsm with excellent servo performance as a high speed and high. This paper intends to briefly present the linear synchronous motor lsm. In the openloop drive mode the phase excitation sequence is executed at a.
A permanent synchronous motor also called a pm motor is a motor in which a magnetic field is generated by permanent magnets. This paper presents a method for compensating the force ripple in permanent magnet linear synchronous motors pmlsms by adopting a composite feedforward compensation scheme. Also, for manual winding, more slot area is allotted to. Permanentmagnet synchronous motor sensorless control using proportionalintegral linear observer with virtual variables. Maguire, senior member, ieee abstractthis paper presents the implementation of a model for a permanent magnet motor on a real time digital simulator. Rsm, the rotor contains either permanent magnets or electromagnets with dc. The growth in the market of permanent magnet motor drives has demanded the need of simulation tools capable of handling motor drive simulations. Modeling and design analysis of a permanent magnet linear. Highperformance motor control is characterized by smooth rotation over the entire speed range of the motor, full torque control at zero speed, and fast acceleration and deceleration. Us5910691a permanentmagnet linear synchronous motor.
Permanent magnet motors exhibit an effect called cogging that results in torque ripple. Matlabsimulink, permanent magnet linear synchronous motors mathematical model is also modeled by end effect and three phase asymmetric winding. Linearization of permanent magnet synchronous machine. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Linear permanent magnet synchronous generator for wave.
Conventionally, a permanent magnet type synchronous linear motor is known as a linear motor used for table feed of a machine tool, a stepper drive mechanism, and the like. Brushless dc motor, permanent magnet synchronous motors. In the following study, a permanent magnet linear synchronous motor is designed and optimized, which will be used to verify the effectiveness of the proposed control method 28, 29. Axial view of internal magnet motor a second morphology for an internal magneti motor is shown in figure 3. First, the mathematical model of the pmlsm is investigated by using the principle of field oriented control. Firdaus1, 2, hiroyuki wakiwaka3, kunihisa tashiro3,andmasaminirei4 abstract permanent magnet linear synchronous motors pmlsm are well known for its high thrust performance. Abstractpermanent magnet linear synchronous motors pmlsm are well known for its high thrust performance. Firdaus1, 2, hiroyuki wakiwaka3, kunihisa tashiro3,andmasaminirei4 abstractpermanent magnet linear synchronous motors pmlsm are well known for its high thrust performance. Flux density calculation of a permanent magnet linear synchronous motor reza ghanaee1, ahmad darabi2, arash kioumarsi1, mohammad reza baghayipour2, mohammad javad morshed1 abstract. Szabo the permanentmagnet variable reluctance linear motors are well suited for precise linear positioning at high speed. Permanent magnet synchronous machine model for real. A synchronous electric motor is an ac motor in which, at steady state, the rotation of the shaft is synchronized with the frequency of the supply current. A permanent magnet linear synchronous motor drive for hts maglev transportation systems youguang guo, jianxun jin, luhai zheng, jianguo zhu, and haiyan lu abstract. Variable network nonlinear magnetic equivalent circuit vnmec model is established to predict the detent force of pmlsm.
Three of the four equations are related to permanent magnet linear synchronous generators by amperes law. It is characterized by a constantly magnetized rotor that is moved synchronously, in other words without the socalled slip, with the magnetic rotational field of the stator. Design of the permanent magnet linear synchronous motor for. Permanentmagnet variablereluctance linear motor control. Based on the analysis of mathematical models of pmlsm and theories of vector control, it puts forward control system modeling method, two control loops which. Research on permanent magnet linear synchronous motor control system simulation. A nonlinear equivalent circuit model for flux density. Linear motor has a lot of merits, such as simple structure, fast dynamic response, high localization accuracy and great speed capability. Firstly, the vector control system of pmlsms is described, and various force disturbances influencing the electromagnetic thrust are analyzed. However, the powerangle curve of the pmlsm has an obvious left deviation phenomenon, which affects the performance of the pmlsm. A permanent magnet linear synchronous motor pmlsm for a high temperature supercon ducting hts. The main purpose of this project was to build a permanent magnet linear synchronous generator. Classical model predictive control of a permanent magnet.