Electric Machines, Drive concepts, control of drives
ANSYS/EMAG3D + CASPOC: Simulation mechatronischer Systeme Abstract Die Berechnung von Magnetfeldern ist ein wichtiges Instrument zur Bestimmung von Parametern, die eine Charakterisierung mechatronischer Systeme ermöglichen. Um deren Verhalten zu beschreiben, zählt neben Kräften, Momenten und Verlusten die Induktivität von Spulensystemen zu den wichtigen Größen. Ziel dieses Beitrags ist es, einen Überblick über die Definition, die Bestimmung mit numerischen Methoden sowie die Anwendung der Induktivität durch die Kopplung von ANSYS/EMAG3D und CASPOC zu geben. |
Modeling Sensorless Control in White Goods Abstract Reducing cost and reducing energy consumption are two important factors in the design of White Goods. In this paper we will discuss the importance of modeling and simulation for White Goods for the following aspects; cheap production, easy to manufacture and high reliability. The main focus in this paper will be on sensorless control. There are many applications that require an electrical drive. To name a few; Refrigerator, washing machine, dishwasher vacuum cleaner, mixer/blender dryer, and so on. Other White Goods applications where power electronics can be applied for improving the efficiency are induction cooking and lighting in the kitchen. |
Coupling between Caspoc and Ansys for controlled system simulation Abstract Simulation of electrical drives and power electronics is changing rapidly. Not only single components need to be simulated, but also entire systems including detailed models of components are the subject of simulation. A coupled simulation between a system simulator and a FEM simulation is favored for the modeling and simulation of entire electrical drives systems including the electrical machine, mechanical load, power electronics converter and control. KeywordsPower electronics, electrical drive, control, system simulation, co-simulation PublishedPeter van Duijsen Simulation Research, The Netherlands, www.caspoc.com |
INTEGRATED SIMULATION OF MECHANICS, ELECTRONICS AND CONTROL Abstract Designing mechatronic systems requires input from different disciplines, mechanical engineering, power electronics, electrical machines and digital/software control. These various discipline components of a system are mostly designed separately, but in the end all components have to form one system. Therefore analysis of such a system has to include all components and the analysis has to be based on one general model. The various components in the system are based on different techniques, but together determine the system behavior of the total system. In this paper methods are presented that allow the integrated analysis based on one general method for a mechatronic system. The focus will be on coupling various modeling methods as well as co-simulation between Finite Element analysis and system simulation. KeywordsSimulation, Finite Elements, Co-Simulation, electrical machines, power electronics |
Parameter extraction in FEM models for dynamic system simulations Abstract The multilevel modeling approach was developed for the combined simulation of various systems. Each system, being power electronics, electrical machines, controller is described by its most efficient model. Various models exist, which describe the electrical and mechanical behavior of electrical machines. These models mostly consist of a set of Differential Algebraic Equations (DAE) and in many cases they can be simplified into Ordinary Differential Equations (ODE). Parameters are determined by measurement in the case of a DC Machine (DCM). For Induction Machines (IM) a first order approximation of the parameters is achieved by a no-load, no-torque and a DC-current test. For the Switched Reluctance Machine (SRM), IM and Brushless DC Machines (BLDCM), the determination of the parameters is more complicated because they are dependent of, for example, rotor position, saturation and geometric. Using complex measurement methods, these parameters can, in theory, be determined. There is however one problem and that is the fact that one would like to know the machine parameters before the machine is actually build. Using field analysis program, parameters for electrical machines could be calculated from the geometrical structure. The parameters calculated in the field analysis are used in the models in the system simulation. In this paper the SRM is modeled using FEM in ANSYS. The inductance per phase is calculated depending on the rotor position and stored in a lookup table. The lookup table is used in the system simulation in CASPOC to perform a simulation of the SRM with mechanical load and control. Keywordsmodeling, simulation, time-domain, motion control, power electronics, FEM, Switched Reluctance Machine, field analysis. |
INTEGRATED SIMULATION OF MECHANICS,
ELECTRONICS AND CONTROL Abstract Designing mechatronic systems requires input from different disciplines, mechanical engineering, power electronics, electrical machines and digital/software control. These various discipline components of a system are mostly designed separately, but in the end all components have to form one system. Therefore analysis of such a system has to include all components and the analysis has to be based on one general model. The various components in the system are based on different techniques, but together determine the system behavior of the total system. In this paper methods are presented that allow the integrated analysis based on one general method for a mechatronic system. The focus will be on coupling various modeling methods as well as co-simulation between Finite Element analysis and system simulation. KeywordsSimulation, Finite Elements, Co-Simulation, electrical machines, power electronics |
TELJESÍTMÉNYELEKTRONIKAI BERENDEZÉSEK SZABÁLYOZÁSA Abstract A teljesítményelektronikai berendezések két alapveto egysége a teljesítménykör, illetve a szabályozó kör. A cikksorozat elozo részei elsosorban a teljesítménykörökkel foglalkoztak, jelen cikk keretében, a terjedelmi korlátok miatt röviden, a szabályozókörökkel foglalkozunk. Két szempont is indokolja, hogy külön kitérnünk a teljesítményelektronikai berendezések szabályozására. Az egyik ok az, hogy a teljesítményelektronikai berendezések a szabályozástechnika szemszögébol egy különleges, nem folytonos, nem lineáris csoportba tartoznak. A másik ok az, hogy napjainkban egyre olcsóbbak és egyre hatékonyabbak a szabályozóként használt digitális eszközök, így korábban az iparban szinte kizárólagosan használt PID szabályozókat egyre bonyolultabb szabályozási algoritmusok váltják fel. Megfigyelheto az a tendencia is, hogy a drága precíziós mechanikát egyre olcsóbb, egyszerubb és robusztusabb mechanikai szerkezetekkel helyettesítik, és az ebbol adódó pontatlanságokat egyre bonyolultabb (nem-lineáris, adaptív, robosztus) szabályozási algoritmussal küszöbölik ki, ezt röviden két egyszeru példával illusztráljuk. KeywordsAdaptive control matlab Simulink PID PublishedA TELJESÍTMÉNYELEKTRONIKA HELYZETE ÉS TÁVLATAI, IV. rész |
Parameter extraction in FEM models for dynamic system
simulations Abstract The multilevel modeling approach was developed for the combined simulation of various systems. Each system, being power electronics, electrical machines, controller is described by its most efficient model. Various models exist, which describe the electrical and mechanical behavior of electrical machines. These models mostly consist of a set of Differential Algebraic Equations (DAE) and in many cases they can be simplified into Ordinary Differential Equations (ODE). Parameters are determined by measurement in the case of a DC Machine (DCM). For Induction Machines (IM) a first order approximation of the parameters is achieved by a no-load, no-torque and a DC-current test. For the Switched Reluctance Machine (SRM), IM and Brushless DC Machines (BLDCM), the determination of the parameters is more complicated because they are dependent of, for example, rotor position, saturation and geometric. Using complex measurement methods, these parameters can, in theory, be determined. There is however one problem and that is the fact that one would like to know the machine parameters before the machine is actually build. Using field analysis program, parameters for electrical machines could be calculated from the geometrical structure. The parameters calculated in the field analysis are used in the models in the system simulation. In this paper the SRM is modeled using FEM in ANSYS. The inductance per phase is calculated depending on the rotor position and stored in a lookup table. The lookup table is used in the system simulation in CASPOC to perform a simulation of the SRM with mechanical load and control. KeywordsModeling, simulation, time-domain, motion control, power electronics, FEM, Switched Reluctance Machine, field analysis. |
Rapid Simulation of Permanent Magnet Drives Abstract For designing an electrical drive a Rapid Application Development (RAD) tool during the design phase of an electrical machine in order to perform fast prototyping, speeds up the development. Using the RAD tool various prototypes of machines can be designed and the prototype of the design can be verified in simulating the complete electrical drive including power electronics, control and mechanical load KeywordsSimulation, Modeling, Brushless PMSM, rapid prototyping, Power Electronics, Smartfem, Caspoc. |
NOVEL CASPOC-BASED SOFTWARE FOR MULTILEVEL SIMULATION OF SWITCHED
RELUCTANCE DRIVES Abstract In this paper a Rapid Application Development (RAD) tool for Switched Reluctance Machine (SRD) design is presented. The RAD tool is coupled to simulation software capable of simulating and optimizing the entire drive system. |
Energy Based Model Synthesis for Electrical Actuators and
Sensors Abstract Electromechanical actuators are one of the widely used drive systems in the recent years. The number of such systems e.g. for automotive and biomedical applications is even more growing now. All together most of these systems must feature a very low power consumption, a small size (and even much smaller in the future) and the production costs should tend to zero using standard components. The computation of the dynamic behavior of a complete electromechanical system including moving parts and eddy current losses is an important requirement for a complete virtual prototype in an up to date development process. This characterization can be realized with an expensive magnetic-mechanical coupled field simulation. A reduced order system simulation based on the co-energy approach can be much more effective if some simplifications related to eddy currents can be made. The following paper summarizes the possibilities and experiences at CADFEM with the finite element program ANSYS as a preferred analysis tool for electromechanical system simulation. |
Multidisciplinary Analysis of Electromechanical
Actuator Based on FEM – Circuit Simulator
Coupling Abstract Design of an electromechanical system is multidisciplinary and so is its simulation. In this paper the three different types of co-simulation are compared and the output waveforms are presented. The co-simulation is realized between two different programs (power electronic circuit simulator – control part and finite element analysis – magnetic and mechanic model part). The simulations were realized for an electromechanical actuator fuel injection system. The output waveforms for coil current, forces, inductances and position are compared. |