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International Publications

Over the years various papers were published which were discussing CASPOC. If you require background information on the program or if you would like to be informed about the mathematics behind the program, have a look at these publications.

Overview of the publications:

Technical Papers

Hybrid Electrical Vehicle Modeling
Integrated Control and Circuit Simulation for a Motion Control System
Rapid Application Development Tool Tesla for Fast Prototyping of Electrical Machines
NOVEL CASPOC-BASED SOFTWARE FOR MULTILEVEL SIMULATION OF SWITCHED RELUCTANCE DRIVES
Integrated Control - Simulation Design Approach
Selection of Semiconductor Models in Power Electronics Simulation
TELJESÍTMÉNYELEKTRONIKAI BERENDEZÉSEK SZABÁLYOZÁSA
CAD/CAE Software Aids Converter Design.
Development of Embedded Control based on Simulation.
Modeling a Bidirectional switch.
Modeling Switched Reluctance Machines in Caspoc and Ansys.
Energy Based Model Synthesis for Electrical Actuators and Sensors
Creating Embedded Control C-Code, PCIM Nurnberg 2002
Small signal modeling, PCIM Nurnberg 2002
Animation in Power Electronics Europe Magazine 7/2001
Animation in PCIM Magazine December 2001
CadFem Infoplaner
CadFem Users Meeting Potsdam 2001
Coupling Amperes and Caspoc
Animation of Power Electronics and Electrical Drives.
Animation of Power Electronics and Electrical Drives.
SIMULATING POWER ELECTRONICS AND ELECTRICAL DRIVES
Weltweit Simulieren
Symulator ukladów analogowych duzej mocy
POWER ELECTRONICS LIBRARIES FOR COMPUTER SIMULATION
COMPUTER SIMULATION FOR POWER ELECTRONICS AND DRIVES
TESTING HARMONIC LIMITS IN SWITCHED MODE POWER SUPPLY DESIGNS USING MODELING AND SIMULATION
THE USE OF MULTILEVEL MODELING FOR MOTION ANALYSIS
METHODS FOR MODELING AND SIMULATION OF POWER ELECTRONICS AND DRIVES
MULTILEVEL MODELING AND SIMULATION OF A SWITCHED RELUCTANCE MACHINE
THE USE OF SIMULATION TO COMPLY WITH THE 555-2 LIMIT ON HARMONICS
MULTILEVEL MODELING AND SIMULATION OF POWER ELECTRONIC CONVERTERS AND DRIVE SYSTEMS.

User Applications

Thermal Analysis of a Multi-Chip Si/SiC-Power Module for Realization of a Bridge Leg of a 10kW Vienna Rectifier
Reliable Operation of a Three-Phase Three-Switch Buck-Type Unity Power Factor Rectifier with Integrated Boost Output Stage
New Robust Switching Commutation for a Tap Changer
TRACTION INDUCTION DRIVE FOR RAILWAY
Integrated approach to network stability and wind energy technology for On-shore and Offshore Applications
Tap changer modeling and Simulation
Modeling of the Vienna Rectifier
Modeling and Simulation of Railway Traction Systems
Simulation of Power Trains for Hybrids and Electrical Cars
Analysis of the Effects of Non-Idealities of the Unity Power Factor PWM Rectifier
Modeling of the Vienna Rectifier
Modeling of the Vienna Rectifier, Part I
Modeling of the Vienna Rectifier, Part II
Modeling of the Vienna Rectifier
Modeling of the Vienna Rectifier
Modeling of the Vienna Rectifier
Modeling of the Vienna Rectifier
New Quadratic PWM DC-DC Converters

Simulation and Animation for Education

Animated and Interactive E-Learning, Concept and Realization
Interactive E-Learning in Electrical Engineering
E-learning for Power Electronics and Electrical Drives

Application notes and brochures

Debugging Modeling Language with Borland-Delphi.

Presentations

Presentation Caspoc 2003, A Simulation Experience
Presentation Choosing Simulation Tools
Presentation Caspoc for Education
Presentation Embeddedd C-Code Control generation
Presentation Small Signal Analysis
Caspoc and Spice Tips and Tricks
Thermal modeling in Ansys-Workbench and Caspoc
Modeling of a Switched Reluctance Machine in Ansys and Caspoc
Presentation Modeling and Simulation
Presentation Coupling between Ansys and Caspoc
Presentation Coupling between Ansys and Caspoc
Presentation Animation
Presentation Embeddedd C-Code Control generation
Presentation Small Signal Analysis

Hybrid Electrical Vehicle Modeling		Read here!
*Abstract:*In this paper published by PitoTech Taiwan, the modeling and simulation of Hybrid Electrical Vehicles is presented
*Keywords:*Hybrid Electric Vehicle
*Published:*Motor Express 268, Taiwan 2008

Integrated Control and Circuit Simulation for a Motion Control System		Read here!
*Abstract:*In this paper the modelling of motion control system with Variable Structure System (VSS) theory using Matlab/Simulink and Caspoc is elaborated. The control is modeled in Simulink, while the power converter is modeled in Caspoc. This has advantages on both sides. Powerful toolboxes existing for Simulink can be used and the power electronics can be modeled in detail in the dedicated power electronics and drives simulation program Caspoc. The main contribution of this paper is the introduction of a powerful simulation tool, which can help in the keystep of most sliding mode designs, namely in the chattering free implementation. This approach and advantages of it are demonstrated on the motion control system. Experimental results of a DSP-controlled single-degree-of- freedom motion-control system are presented and compared with the simulation.
*Keywords:*Simulation Variable structure control chattering suppression Simulink
*Published:*EPE 2003 Conference and exhibition, Toulouse France 2003

Rapid Application Development Tool Tesla for Fast Prototyping of Electrical Machines		Read here!
*Abstract:*Designers of electrical machines and drives need a Rapid Application Development (RAD) tool during the design phase of an electrical machine in order to perform fast prototyping. Using the tool various prototypes of machines can be designed.
*Keywords:*Telsa RAD prototype brushless dc machine permanent synchronous induction
*Published:*PCIM Conference and exhibition Nürnberg Germany 2003

NOVEL CASPOC-BASED SOFTWARE FOR MULTILEVEL SIMULATION OF SWITCHED RELUCTANCE DRIVES		Read here!
*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.
*Keywords:*Telsa RAD prototype switched reluctance machine
*Published:*PCIM Conference and exhibition Nürnberg Germany 2003

Integrated Control - Simulation Design Approach		Read here!
*Abstract:*In this paper the modeling of motion control system with Variable Structure System (VSS) theory using Matlab/Simulink and Caspoc is elaborated. The control is modeled in Simulink, while the power converter is modeled in Caspoc. This has advantages on both sides. Powerful toolboxes existing for Simulink can be used and the power electronics can be modeled in detail in the dedicated power electronics and drives simulation program Caspoc. This approach and advantages of it are demonstrated on the motion control system. Experimental results of a DSP-controlled single-degree-of- freedom motion-control system are presented too and compared with the simulation.
*Keywords:*Matalb Simulink Caspoc control VSS
*Published:*PCIM Conference and exhibition Nürnberg Germany 2003

Selection of Semiconductor Models in Power Electronics Simulation		Read here!
*Abstract:*In the design process of new prototypes modeling and simulation is an excepted methodology. There are standard simulation tools available and there are numerous examples and literature about models. Even manufactures start to provide models of their produced components. In this paper we will concentrate on models for power electronics semiconductors.
*Keywords:*Semiconductor mosfet model
*Published:*PCIM Conference and exhibition Nürnberg Germany 2003

TELJESÍTMÉNYELEKTRONIKAI BERENDEZÉSEK SZABÁLYOZÁSA		Read here!
*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.
*Keywords:*Adaptive control matlab Simulink PID
*Published:*A TELJESÍTMÉNYELEKTRONIKA HELYZETE ÉS TÁVLATAI, IV. rész

CAD/CAE Software Aids Converter Design.		Read here!
*Published:*Power Electronics Technology Magazine Issue July 2002

Development of Embedded Control based on Simulation.		Read here!
*Published:*PEMC Cavtat, Croatia 2002

Modeling a Bidirectional switch.		Read here!
*Published:*Drives & controls - Hydraulics & Pneumatics - Power Electronics Conference, NEC Birmingham 2002

Modeling Switched Reluctance Machines in Caspoc and Ansys.		Read here!
*Published:*PCIM Conference and exhibition Nürnberg Germany 2002

Energy Based Model Synthesis for Electrical Actuators and Sensors		Read here!
*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.
*Keywords:*Dynamic Simulation of Electromechanical Systems using ANSYS and CASPOC
*Published:*PCIM Conference and exhibition Nürnberg Germany 2002

Creating Embedded Control C-Code, PCIM Nurnberg 2002		Read here!
*Published:*PCIM Conference and exhibition Nürnberg Germany 2002

Small signal modeling, PCIM Nurnberg 2002		Read here!
*Published:*PCIM Conference and exhibition Nürnberg Germany 2002

Animation in Power Electronics Europe Magazine 7/2001		Read here!
*Published:*Power Electronics Europe Magazine 7/2001

Animation in PCIM Magazine December 2001		Read here!
*Published:*PCIM Magazine December 2001

CadFem Infoplaner		Read here!
*Published:*CadFem Infoplaner

CadFem Users Meeting Potsdam 2001		Read here!
*Published:*CadFem Users Meeting Potsdam 2001

Coupling Amperes and Caspoc		Read here!

Animation of Power Electronics and Electrical Drives.		Read here!
*Keywords:*Animation, modeling, simulation, power electronics, electrical drives, teaching
*Published:*PCIM Conference and exhibition Nürnberg Germany 2001

Animation of Power Electronics and Electrical Drives.		Read here!
*Abstract:*In this paper a new multilevel simulation/animation tool Caspoc®, [Simulation Research, 2001] is described, which during simulation animates the power electronic circuit. The user sees the level of the node-voltages, the level of the branch currents and most important, he can see the current path in the circuit. The simulation tool can animate any power electronic circuit or electrical drive. Examples of power electronic and electrical drive animations are given, which show the advantage of animation.
*Keywords:*Animation, modeling, simulation, power electronics, electrical drives, teaching
*Published:*EPE Conference and exhibition Graz Austria 2001

SIMULATING POWER ELECTRONICS AND ELECTRICAL DRIVES		Read here!
*Abstract:*Simulation starts to become an accepted tool for the design of power electronics and electrical drives. Over the last 30 years there have been remarkable advances in tools for the simulation of power electronics and electrical drives. Not only advances in the user interface of the programs, but also advances in the underlying methods on which these simulation tools are based. Although not clear to the majority of users, there are many different mathematical methods on which the simulation tools are based. The basic mathematical methods are still favorite and nearly all tools are based on the basic mathematical methods like state space models, nodal analysis and differential algebraic equations. Hidden by a user interface the user has not always the ability to see how the actual simulation is taking place. In this paper some basic mathematical methods are explained, which are used by the popular simulation tools. The main differences between the nodal analysis and state space formulation, are explained, as well as differential algebraic equations. Mathematical methods for solving algebraic equations are presented as they appear in packages such as Spice and Saber. Numerical mathematical methods used for the solving of differential equations are described, where the differences between nodal analysis and state space analysis is explained. The modeling and simulation of motion control system is a known and proven method. The modeling and simulation of power electronics is gaining more attention. For power electronics and motion control industries, various modeling and simulation packages are available. The integration of modeling and simulation for both motion control and power electronics into one package is not so wide spread. The examples in this paper will focus on modeling for motion control, which can be combined with a model of the power electronics. The combined multilevel model can be used for simulation in a multilevel simulation package. The possibility of various models common to motion control are discussed, ranging from models describing mechanical loads, as well as models describing the control components, such as 2/3 phase and 3/2 phase transformations, park transformations and rotating frames of reference. These motion control blocks can be combined with an electrical circuit model of the power electronics components. The user has the possibility to define his own motion control models in a high-level programming or a block-diagram, enabling him to model, for example, a field oriented controller or controls for application specific drives, such as fans, pumps and automotive applications. To design these new power electronics and electrical drives, modern tools are required to help the designer. There exist various simulation programs for computer simulation of electric systems, but few are dedicated to power electronics and electrical drives. In this paper the use of a multilevel simulation program for the design of power electronics and electrical drives is discussed. The focus is on libraries of power electronics and electrical drive components, which ease the use of a simulation program.
*Keywords:*Animation, modeling, simulation, power electronics, electrical drives, teaching
*Published:*Drives & controls - Hydraulics & Pneumatics - Power Electronics Conference, Excel Exhibition Center London 2001

Weltweit Simulieren		Read here!
*Abstract:*Der traditionelle Designprozess entspricht zunehmend nicht mehr den Anforderungen, die bezüglich Qualität und Markt-einführungszeiten an Entwickler analoger Komponenten gestellt werden. Aus diesem Grund werden verstärkt Komplett-lösungen angeboten, die internetbasierte Simulationswerk-zeuge beinhalten. Das ist natürlich kein Allheilmittel, denn die eigentliche Simulation wird weiterhin durch den Entwickler durchgeführt, der über entsprechendes Know-how verfügen muss. Der grosse Vorteil liegt hier in der relativ preisgünstigen Verfügbarkeit von Simulationswerkzeugen und dem Zugriff auf vorgefertigte Modelle verschiedener Bauelemente bzw. Subsysteme. Der nachfolgende Artikel ist als Übersicht zu wichtigen, im Internet verfügbaren analogen/mixed-signal Simulationstools gedacht. Er erhebt keinen Anspruch auf Voll-ständigkeit.
*Keywords:*Simulation programs
*Published:*Design & Electronik ANALOGTECHNIK JANUAR 2000

Symulator ukladów analogowych duzej mocy		Read here!
*Published:*Elektronika Praktyczna 9/2000

POWER ELECTRONICS LIBRARIES FOR COMPUTER SIMULATION		Read here!
*Abstract:*Although schematic entry for simulation programs is commonly known, there are some levels of abstraction in creating a schematic, using libraries. This paper focuses on the levels of abstraction of different libraries, which can be applied in creating schematic entry for a simulation program. The level of abstraction can be applied for the most common available simulation programs, but is in this paper dedicated to a multilevel simulation program for power electronics and electrical drives. Two examples are presented where use is made of standard and extended component libraries.
*Keywords:*Multilevel modeling simulation
*Published:*PCIM Conference and exhibition Nürnberg Germany 1999

COMPUTER SIMULATION FOR POWER ELECTRONICS AND DRIVES		Read here!
*Abstract:*Computer simulation of power electronics and electrical drives is starting to be a common tool, such as breadboarding and the oscilloscope. There is a large amount of programs for modeling and simulation of electronics and there are several programs for the modeling and simulation of dynamic systems such as drives and controllers. lthough all these programs perform various modeling and simulation methods, they are all based on the same theoretical principles. This paper discusses basic principles of modeling and simulation, which nowadays commercial programs use as their engine. Emphasizes is given towards the modeling in the time domain, because nearly all-commercial available modeling and simulation programs are based on this principle.
*Keywords:*Multilevel modeling simulation
*Published:*PCIM Conference and exhibition Nürnberg Germany 1998

TESTING HARMONIC LIMITS IN SWITCHED MODE POWER SUPPLY DESIGNS USING MODELING AND SIMULATION		Read here!
*Abstract:*European regulation on current limits in Switched Mode Power Supplies (SMPS) requires a more complex design of the SMPS. Using passive filters or a power factor correction (PFC) circuit the input current of a SMPS has to be within certain limits imposed by, for example, the IEC 1000. In this paper the use of modeling and simulation is discussed to test the design for the IEC 1000 on limits on harmonics. A short introduction is given on the minimal requirements for modeling in order to effectively model the generation of harmonics in a SMPS. Special attention is given to ideal semiconductor modeling and to modeling of a PFC circuit. The online calculation of harmonics and the power factor (PF) of a SMPS is discussed. Using this method, the harmonics and PF are calculated during the simulation. Because the user can interactively change parameters of the SMPS, he has the possibility of tuning the SMPS during simulation. Compared to offline calculations of harmonics, the online method is faster and allows the user to optimize his design. Also emphasizes is given on the visualization of the calculated harmonics, power factor, phase angles, both for single- and three-phase circuits. In this paper two examples are discussed. The first example is a power factor correction (PFC) SMPS. The online calculation of the PF and harmonics is discussed. Offline calculated harmonics are compared with the IEC 1000 limit on harmonics. The second example is compensation of reactive power in an industrial grid. The phase angle between the three phase voltages and currents is made visible. Compensation is achieved by using capacitors.
*Keywords:*Multilevel modeling simulation Harmonics limits
*Published:*PCIM Conference and exhibition Nürnberg Germany 1997

THE USE OF MULTILEVEL MODELING FOR MOTION ANALYSIS		Read here!
*Abstract:*The modeling and simulation of motion control system is a known and proven method. The modeling and simulation of power electronics is gaining more attention. For power electronics and motion control industries, various modeling and simulation packages are available. The integration of modeling and simulation for both motion control and power electronics into one package is not so wide spread. This paper will focus on modeling for motion control, which can be combined with a model of the power electronics. The combined multilevel model can be used for simulation in a multilevel simulation package. The possibility of various models common to motion control are discussed, ranging from models describing mechanical loads, as well as models describing the control components, such as 2/3 phase and 3/2 phase transformations, park transformations and rotating frames of reference. These motion control blocks can be combined with an electrical circuit model of the power electronics components. The user has the possibility to define his own motion control models in a high-level programming or a block-diagram, enabling him to model, for example, a field oriented controller or controls for application specific drives such as, fans, pumps and automotive applications.
*Keywords:*Multilevel modeling simulation Drives Motion
*Published:*PCIM Conference and exhibition Nürnberg Germany 1996

METHODS FOR MODELING AND SIMULATION OF POWER ELECTRONICS AND DRIVES		Read here!
*Abstract:*The availability of personal computers to electronic engineers created a wide range of simulation programs. In general these programs were designed for modeling and simulation of analog circuits. For power electronics various modeling methods were developed. In this paper an overview is presented of the various methods for modeling and simulation of power electronics and electrical drives hereafter referred to as Power Conversion Systems; (PCS). Mathematical modeling methods such as state space equations, modified nodal analysis, differential algebraic equations and transmission lines are discussed and compared. The minimum requirements for modeling (circuit, block-diagram, behavioral equations) and the types of analysis (transient, steady-state, small-signal) are discussed.
*Keywords:*Multilevel modeling simulation steady-state small-signal
*Published:*PCIM Conference and exhibition Nürnberg Germany 1996

MULTILEVEL MODELING AND SIMULATION OF A SWITCHED RELUCTANCE MACHINE		Read here!
*Abstract:*In this paper the modeling and simulation of a Switched Reluctance Machine is described. Modeling and simulation is an already accepted method in the design of drive systems. The entire drive, including power converter, SRM, mechanical load and control are modeled in one multilevel model. In the paper it is explained why use is made of a multilevel package for modeling and simulation of a complete drive system. The application of mechatronic systems requires more modeling effort compared to modeling of regular electronic systems. This is caused by the difference in models for the electrical machine, the power converter and the control of the drive. A multilevel model is applied, which combines the circuit model, a block-diagram and programming language and thereby eases the modeling process. Because of the required small time step in the simulation of the power converter the total simulation time is large. Therefore a simulation program has to be used, which has special ideal models for the semiconductor switches and thus reducing the total simulation time. Results from the simulation show the internal waveforms of the converter, such as the rotor angle dependent inductance of the stator, angular frequency of the rotor and the torque produced by the SRM.
*Keywords:*Multilevel modeling simulation Switched Reluctance Machine
*Published:*PCIM Conference and exhibition Nürnberg Germany 1995

THE USE OF SIMULATION TO COMPLY WITH THE 555-2 LIMIT ON HARMONICS		Read here!
*Abstract:*Harmonics generated by power electronic converters cause disturbances on the main grid. EC regulation nowadays provides limits on the generation of harmonics. The design of power electronic converters which are directly connected to the main grid becomes more difficult. A method to ease the design, is to use modeling and simulation. In this paper a three-phase rectifier is the subject of a simulation study. Although the simulation of such a rectifier was presented by different authors, the paper shows that modeling and simulation are of special importance for the design process, where reduction of generated harmonics is of special interest.
*Keywords:*Multilevel modeling simulation IEC Harmonics Limit
*Published:*PCIM Conference and exhibition Nürnberg Germany 1995

MULTILEVEL MODELING AND SIMULATION OF POWER ELECTRONIC CONVERTERS AND DRIVE SYSTEMS.		Read here!
*Abstract:*This paper introduces the program CASPOC for multilevel modeling and simulation of electric circuits and dynamic block diagram. Because of the multilevel approach it is possible to model the power converter, electric components and the control on different levels. These levels are combined into one multilevel model. It combines the advantages of modeling with circuit elements, dynamic non-linear system blocks and modeling language. Using the program you can model power electronic converters and electric machines. You can also model an analog or digital control, like for example vector or fuzzy control, enabling the complete multilevel modeling and simulation of drive systems.
*Keywords:*Multilevel modeling simulation
*Published:*PCIM Conference and exhibition Nürnberg Germany 1994

Thermal Analysis of a Multi-Chip Si/SiC-Power Module for Realization of a Bridge Leg of a 10kW Vienna Rectifier		Read here!
*Abstract:*For realizing a three-phase 400VAC/800VDC 10kW unity power factor PWM (VIENNA) rectifier system a novel Si/SiC multi-chip power semiconductor modules (IXYS VUM26B) facilitating switching frequencies up to 500kHz is employed. Direct water cooling of the modules base plates does significantly reduce the size of the cooling system. As the heat flow is directly from the power module into the water the cooling system can be realized using non-metal heat sink what does reduce common-mode EMI emissions. In this paper it is shown how the time behavior of the power module semiconductor junction temperatures over a mains period can be calculated with high accuracy by combining simple thermal equivalent circuits and stationary thermal simulations of the cooling system. Furthermore, the determination of the switching losses by circuit simulation based on experimental data is discussed and the power transistor and power diode junction temperatures are investigated for different operating points of the rectifier system.
*Keywords:*Thermal Analysis Multi-Chip Si/SiC-Power Module Bridge Leg Vienna Rectifier
*Published:*Intelec 2003

Reliable Operation of a Three-Phase Three-Switch Buck-Type Unity Power Factor Rectifier with Integrated Boost Output Stage		Read here!
*Abstract:*In this paper the reliable operation of a three-phase three-switch buck-type PWM unity power factor rectifier with integrated boost output stage under heavily unbalanced mains, i.e. mains voltage unbalance, loss of one phase, short circuit of two phases or earth fault of one phase is investigated theoretically and experimentally. The analytical calculation of the relative on-times of the active switching states and of the DC link current reference value is treated in detail for active and deactivated boost output stage. Based on the theoretical considerations a control scheme which allows to control the system for any mains condition without change over of the control structure is described. Furthermore, digital simulations as well as experimental results are shown which confirm the proposed control concept for different mains failure con-ditions and for the transition from balanced mains to a failure con-dition and vice versa. The experimental results are derived from a 5kW prototype (input voltage range (208 ...480)Vrms line-to-line, output voltage 400VDC of the rectifier system, where the control is realized by a 32-bit digital signal processor.
*Keywords:*Control Concept Reliable Operation Three-Phase Three-Switch Buck-Type Unity Power Factor Rectifier Integrated Boost Output Stage Unbalanced
*Published:*PESC 2003

New Robust Switching Commutation for a Tap Changer		Read here!
*Abstract:*Tap changer converter periodically connects and disconnect transformer tap hereby achieving continuous voltage regulation. Commutation cell with bi-directional switch and high frequency switching is a basic building element. Used technique requires additional inductances or use accurate current measurement and has potential hazards. Different solutions are suggested in the paper and verified by simulation and experimental study. For tap changer converter commutation it is important that the commutation is symmetrical. A symmetrical smart commutation technique without necessity to measure current is developed and presented. Experiments verify the simulation results. The application of such a commutation is demonstrated on 500kVA tap changed transformer. Voltage regulation with tap changer is demonstrated too.
*Keywords:*Tap changer commutation Power Quality Converter Circuits
*Published:*EPE 2003 Conference and exhibition, Toulouse France 2003

TRACTION INDUCTION DRIVE FOR RAILWAY		Read here!
*Abstract:*This paper presents the computer simulation and comprehensive dynamic processes of the induction motor with three-phase power inverter for traction application analysis. The control with proportional variation of amplitude and frequency of the power inverter are realized. The computer simulation of the considered traction drive on the basis of CASPOC software is executed. Computer CASPOC models of the induction motor, three-phase power inverter, control circuits and equivalent circuit of mechanical load are presented. Different control laws during acceleration of the traction induction drive and their influence on dynamic behaviour are researched. Transients of the traction induction drive with impulse and harmonic input voltage of the induction motor are compared. The procedure to design of the traction drive control with improving dynamic and power characteristics is offered.
*Keywords:*Induction motors converter control traction simulation
*Published:*EPE 2003 Conference and exhibition, Toulouse France 2003

Integrated approach to network stability and wind energy technology for On-shore and Offshore Applications		Read here!
*Abstract:*In this paper, the issues of interconnecting large wind parks to the electrical power network are discussed and possible solutions to counter-act problems are presented. In order to proceed with these large-scale wind farm projects, an integrated approach using key wind farm technologies, AC and DC transmission technologies, as well as network load-flow and dynamic stability mitigation and storage technologies (FACTS) are required. Practical and realistic limits for classic wind power generation are discussed. The feasibility of a 6 GW offshore and 100 MW near-shore wind farm are discussed as case studies, using integrated storage and STATCOM options. Year (MW)
*Keywords:*Statcom model
*Published:*PCIM Conference and exhibition Nürnberg Germany 2003

Tap changer modeling and Simulation		Read here!
*Published:*PCIM Nurnberg 2002

Modeling of the Vienna Rectifier		Read here!
*Published:*PCIM Nurnberg 2002

Modeling and Simulation of Railway Traction Systems		Read here!
*Published:*PCIM Nurnberg 2002

Simulation of Power Trains for Hybrids and Electrical Cars		Read here!
*Published:*PEMC Cavtat 2002

Analysis of the Effects of Non-Idealities of the Unity Power Factor PWM Rectifier		Read here!
*Published:*Pesc 2002

Modeling of the Vienna Rectifier		Read here!
*Published:*Pesc 2001

Modeling of the Vienna Rectifier, Part I		Read here!
*Published:*APEC 2002

Modeling of the Vienna Rectifier, Part II		Read here!
*Published:*APEC 2002

Modeling of the Vienna Rectifier		Read here!
*Published:*INTELEC 2002

Modeling of the Vienna Rectifier		Read here!
*Published:*PCC 2002

Modeling of the Vienna Rectifier		Read here!
*Published:*PESC 2002

Modeling of the Vienna Rectifier		Read here!
*Published:*PCIM-PQC 2002

New Quadratic PWM DC-DC Converters		Read here!
*Published:*PCIM Nurnberg 2001

Animated and Interactive E-Learning, Concept and Realization		Read here!
*Abstract:*Today’s multimedia opportunities offer new approaches to attractive, high quality and very efficient education. In the framework of a European Union Leonardo da Vinci II program, a well designed concept, a clear methodology, the application of carefully selected software programs and a European-wide co-operation shall produce a set of courses on general and some special topics of electrical engineering. These courses are intended for live presentations (lectures) and for web-based distant learning as well, including in-detail explanations for repetition and self study. The modules contain animations and simulations and allow for the change of parameters while giving direct response on the results.
*Keywords:*E-Learning and E-training, Advanced Electrical Engineering Education, Animations, On-line Simulations, International Project
*Published:*The IASTED International Conference on WEB-BASED EDUCATION, WBE 2004, February 16-18, 2004, Innsbruck, Austria

Interactive E-Learning in Electrical Engineering		Read here!
*Abstract:*The contribution deals with concept and methodology of interactive multimedia courses design in various fields of electrical engineering. It is based on an international educational project solved within Leonardo da Vinci II programme. The principles of preparing the multimedia modules in the unified environment are presented. Although there are different requirements for e-learning modules aimed at lecturing and at self study, the presented solution is suitable for both cases.
*Keywords:*E-Learning Education Interactive Screens
*Published:*EDPE 2003 International Conference on Electrical Drives and Power Electronics, The High Tatras, Slovak Republic 2003

E-learning for Power Electronics and Electrical Drives		Read here!
*Abstract:*Software tool for teaching Power Electronics and Electrical Drives is analyzed from different points f view. Possibilities how to show current and voltage for Power Electronics as well as power are discussed. Effectiveness of e-learning is demonstrated on example of an electronic tap changer commutation method which is explained first with traditional method and for comparison with interactive animation (e-learning). The chosen SW contains mathematical support which enables to develop algorithms for interactive e-learning modules with multimedia features what is presented on examples form field of electrical drives. In case when mathematical description of the system is too complicated, the interactivity is substituted by simple animation.
*Keywords:*E-Learning Education Interactive Screens
*Published:*EDPE 2003 International Conference on Electrical Drives and Power Electronics, The High Tatras, Slovak Republic 2003

Debugging Modeling Language with Borland-Delphi.		Read here!
*Abstract:*Application note on using the Borland-Delphi debugger for the Modeling Language

Presentation Caspoc 2003, A Simulation Experience		Read here!
*Abstract:*Learn about the features of Caspoc and why CASPOC 2003 is the simulation tool for you!
*Keywords:*Caspoc 2003 features
*Published:*2004

Presentation Choosing Simulation Tools		Read here!
*Abstract:*Learn more about modeling and simulation. What tools to choose when you want to start with simulation.
*Keywords:*modeling simulation
*Published:*2003

Presentation Caspoc for Education		Read here!
*Abstract:*Especially for education Caspoc has special features like the animation and the viewer. Learn more why Caspoc 2003 is your tool for teaching power electronics and electrical drives!
*Keywords:*Caspoc 2003 education viewer tutorial samples workbook
*Published:*2004

Presentation Embeddedd C-Code Control generation		Read here!
*Abstract:*Export Embedded C Code from the block diagram in Caspoc or couple to HIL
*Keywords:*Embedded C Code HIL
*Published:*PCIM 2002

Presentation Small Signal Analysis		Read here!
*Abstract:*In this presentation the calculation of the small signal trnasfer function or the impedance calculation for any type of power electronics or electrical drive is discussed.
*Keywords:*Small signal SMPS impedance transfer function non-linear
*Published:*PCIM 2002

Caspoc and Spice Tips and Tricks		Read here!
*Abstract:*Learn about the differences between Caspoc and Spice and master some tips and tricks for Spice
*Keywords:*Caspoc spice
*Published:*2004

Thermal modeling in Ansys-Workbench and Caspoc		Read here!
*Abstract:*Create thermal models from packaging in Ansys-Workbench for co-simulation with your semiconductor models in Caspoc.
*Keywords:*Caspoc Thermal Ansys Workbench
*Published:*2004

Modeling of a Switched Reluctance Machine in Ansys and Caspoc		Read here!
*Abstract:*Model the Switched Reluctance Machine in Ansys, calculate the rotor position dependent parameters of the SRM and perform the simulation of the entire drive in Caspoc.
*Keywords:*Caspoc Switched Reluctance Machine SRM Drive Ansys Workbench
*Published:*2004

Presentation Modeling and Simulation		Read here!
*Abstract:*This presentation focusses on multilevel modeling. The difference between the block diagram and the circuit models are explined as well as what method to choose for.
*Keywords:*Caspoc 2003 modeling simulation semiconductor models MNA block diagram state space
*Published:*2003

Presentation Coupling between Ansys and Caspoc		Read here!
*Abstract:*Extract data from you field solver and use the parameters or data files in your Caspoc simulation!
*Keywords:*Caspoc 2003 fieldsolver FEM SRM
*Published:*2002

Presentation Coupling between Ansys and Caspoc		Read here!
*Abstract:*Extract data from you field solver and use the parameters or data files in your Caspoc simulation!
*Keywords:*Caspoc 2003 fieldsolver FEM SRM
*Published:*2002

Presentation Animation		Read here!
*Abstract:*This presentation discusses the animation of power electronic circuits and electrical drives. Examples are given where animation for education is shown as well as the application of animation for detecting faults in complex power electronics circuits.
*Keywords:*Animation simulation education fault detection
*Published:*Various Seminars 2003

Presentation Embeddedd C-Code Control generation		Read here!
*Abstract:*Export Embedded C Code from the block diagram in Caspoc or couple to HIL
*Keywords:*Embedded C Code HIL
*Published:*PCIM 2002

Presentation Small Signal Analysis		Read here!
*Abstract:*In this presentation the calculation of the small signal trnasfer function or the impedance calculation for any type of power electronics or electrical drive is discussed.
*Keywords:*Small signal SMPS impedance transfer function non-linear
*Published:*PCIM 2002

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