Pub Date : 1996-08-11DOI: 10.1109/CIPE.1996.612347
B. Pejcinovic, H. Brech, M. Persun
Use of device simulation programs in teaching power semiconductor devices courses is illustrated. A design procedure for DMOSFET is outlined and use of simulation to analyze device behavior is illustrated. It is shown that the parasitic BJT plays a very important role and the device design should try to minimize it from the very beginning. Usefulness of the device simulation in the analysis of the device operation is demonstrated. Some of the common problems in using simulation are given and remedies provided.
{"title":"Role of parasitic BJT in the design of DMOSFET","authors":"B. Pejcinovic, H. Brech, M. Persun","doi":"10.1109/CIPE.1996.612347","DOIUrl":"https://doi.org/10.1109/CIPE.1996.612347","url":null,"abstract":"Use of device simulation programs in teaching power semiconductor devices courses is illustrated. A design procedure for DMOSFET is outlined and use of simulation to analyze device behavior is illustrated. It is shown that the parasitic BJT plays a very important role and the device design should try to minimize it from the very beginning. Usefulness of the device simulation in the analysis of the device operation is demonstrated. Some of the common problems in using simulation are given and remedies provided.","PeriodicalId":126938,"journal":{"name":"5th IEEE Workshop on Computers in Power Electronics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1996-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120994861","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1996-08-11DOI: 10.1109/CIPE.1996.612355
D. Handran, R. Bass, F. Lambert, J. Kennedy
This paper discusses a simulation study of the effects of operating large quantities of battery chargers on an electric utility distribution system. Harmonic effects are modeled with Electrotek's SuperHarm program, part of the HarmFlo+ workstation package. During the operational period of the tram battery charging facility, measurements at different points along the distribution system were taken and compared to results predicted by SuperHarm. Once the accuracy of the simulation model was confirmed, specific scenarios involving capacitor arrangement, IEEE 519 compliance and charger comparisons were investigated.
{"title":"Simulation of distribution feeders and charger installation for the Olympic electric tram system","authors":"D. Handran, R. Bass, F. Lambert, J. Kennedy","doi":"10.1109/CIPE.1996.612355","DOIUrl":"https://doi.org/10.1109/CIPE.1996.612355","url":null,"abstract":"This paper discusses a simulation study of the effects of operating large quantities of battery chargers on an electric utility distribution system. Harmonic effects are modeled with Electrotek's SuperHarm program, part of the HarmFlo+ workstation package. During the operational period of the tram battery charging facility, measurements at different points along the distribution system were taken and compared to results predicted by SuperHarm. Once the accuracy of the simulation model was confirmed, specific scenarios involving capacitor arrangement, IEEE 519 compliance and charger comparisons were investigated.","PeriodicalId":126938,"journal":{"name":"5th IEEE Workshop on Computers in Power Electronics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1996-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113977066","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1996-08-11DOI: 10.1109/CIPE.1996.612348
B. Fatemizadeh, P. Lauritzen
This paper presents a new bipolar junction transistor (BJT) modeling approach using an analytical method which provides sufficient accuracy for most power electronics applications with fast simulation times. This new analytical model includes all important physical effects: recombination in base and emitter; high injection; collector conductivity modulation; quasi-saturation; carrier velocity saturation; and displacement current.
{"title":"An analytical model of power bipolar transistor for circuit simulation","authors":"B. Fatemizadeh, P. Lauritzen","doi":"10.1109/CIPE.1996.612348","DOIUrl":"https://doi.org/10.1109/CIPE.1996.612348","url":null,"abstract":"This paper presents a new bipolar junction transistor (BJT) modeling approach using an analytical method which provides sufficient accuracy for most power electronics applications with fast simulation times. This new analytical model includes all important physical effects: recombination in base and emitter; high injection; collector conductivity modulation; quasi-saturation; carrier velocity saturation; and displacement current.","PeriodicalId":126938,"journal":{"name":"5th IEEE Workshop on Computers in Power Electronics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1996-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133110954","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1996-08-11DOI: 10.1109/CIPE.1996.612356
A. Balakrishnan, R. Cloutier, M. E. Strysko, G. Uhlendorff
Over the past few years, disk drive capacities and performance have changed for the better in a dramatic fashion. While disk drives in personal computers only a few years ago had capacities of a few hundred megabytes, storage capacities of an order of magnitude greater are increasingly commonplace. The disk drive essentially consists of one or more disks which store the data, spinning at a high rotational speed, usually of the order of a few thousand revolutions minute (RPM). An actuator which supports suspension for the data accessing heads moves over the data surfaces of the disk(s) and transfers data to and from the other parts of a computer. Since, based on capacity, the number of data disks can vary from one to ten (or even higher), and the rotational speed can vary over a wide range, the spindle motors used in these disk drives can be of very different designs.
{"title":"A general-purpose driver for spindle motors in rigid disk drive applications","authors":"A. Balakrishnan, R. Cloutier, M. E. Strysko, G. Uhlendorff","doi":"10.1109/CIPE.1996.612356","DOIUrl":"https://doi.org/10.1109/CIPE.1996.612356","url":null,"abstract":"Over the past few years, disk drive capacities and performance have changed for the better in a dramatic fashion. While disk drives in personal computers only a few years ago had capacities of a few hundred megabytes, storage capacities of an order of magnitude greater are increasingly commonplace. The disk drive essentially consists of one or more disks which store the data, spinning at a high rotational speed, usually of the order of a few thousand revolutions minute (RPM). An actuator which supports suspension for the data accessing heads moves over the data surfaces of the disk(s) and transfers data to and from the other parts of a computer. Since, based on capacity, the number of data disks can vary from one to ten (or even higher), and the rotational speed can vary over a wide range, the spindle motors used in these disk drives can be of very different designs.","PeriodicalId":126938,"journal":{"name":"5th IEEE Workshop on Computers in Power Electronics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1996-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114530291","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1996-08-11DOI: 10.1109/CIPE.1996.612338
Y. Kuroe, T. Kato
In designing a power electronic circuit, it is often required to find the regions of the circuit parameters such that the circuit takes an operating mode. This paper describes a general computer method for determining the operating-mode boundaries in power electronics circuits. In general, the conditions of operating-mode boundaries in power electronic circuits are expressed by nonlinear algebraic equations, the solutions of which are curves in parameters space. The operating-mode boundaries are obtained by tracing the solution curves by using the concept of the homotopy continuation method.
{"title":"A computer method for finding operating mode boundaries in power electronic circuits by curve tracing","authors":"Y. Kuroe, T. Kato","doi":"10.1109/CIPE.1996.612338","DOIUrl":"https://doi.org/10.1109/CIPE.1996.612338","url":null,"abstract":"In designing a power electronic circuit, it is often required to find the regions of the circuit parameters such that the circuit takes an operating mode. This paper describes a general computer method for determining the operating-mode boundaries in power electronics circuits. In general, the conditions of operating-mode boundaries in power electronic circuits are expressed by nonlinear algebraic equations, the solutions of which are curves in parameters space. The operating-mode boundaries are obtained by tracing the solution curves by using the concept of the homotopy continuation method.","PeriodicalId":126938,"journal":{"name":"5th IEEE Workshop on Computers in Power Electronics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1996-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114984424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1996-08-11DOI: 10.1109/CIPE.1996.612328
P. Pejovic, D. Maksimović
This paper describes PETS (Power Electronics Transient Simulator), a computer program for the time-domain analysis of power electronic circuits. Methods implemented in PETS include standard techniques such as the modified nodal approach to forming system equations and numerical integration with automatic time-step control, together with new techniques including a state determination algorithm and representation of elements to maintain a constant system matrix. The simulator supports arbitrarily complex piecewise-linear models and smooth nonlinear models using a delay approximation. The methods implemented in PETS are illustrated using two examples: a quadratic buck power converter, and a closed-loop power factor corrector.
{"title":"PETS-a simulation tool for power electronics","authors":"P. Pejovic, D. Maksimović","doi":"10.1109/CIPE.1996.612328","DOIUrl":"https://doi.org/10.1109/CIPE.1996.612328","url":null,"abstract":"This paper describes PETS (Power Electronics Transient Simulator), a computer program for the time-domain analysis of power electronic circuits. Methods implemented in PETS include standard techniques such as the modified nodal approach to forming system equations and numerical integration with automatic time-step control, together with new techniques including a state determination algorithm and representation of elements to maintain a constant system matrix. The simulator supports arbitrarily complex piecewise-linear models and smooth nonlinear models using a delay approximation. The methods implemented in PETS are illustrated using two examples: a quadratic buck power converter, and a closed-loop power factor corrector.","PeriodicalId":126938,"journal":{"name":"5th IEEE Workshop on Computers in Power Electronics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1996-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132873861","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1996-08-11DOI: 10.1109/CIPE.1996.612341
M. Lindgren
A technique to evaluate the dynamic performance of control principles for PWM-converter systems is presented. In the modelling of vector-controlled, grid-flux-oriented control systems, nonlinear switches and time-varying elements due to coordinate transformation occur in the feedback loop. By using space-vector averaging, coordinate transformations and nonlinear switches are avoided. A linear time-invariant analytical model in the grid-flux-oriented dq-frame is derived. Simulations with a switched PWM-model and an analytical model show accurate transient response and frequency response.
{"title":"Analysis and simulation of digitally-controlled grid-connected PWM-converters using the space-vector average approximation","authors":"M. Lindgren","doi":"10.1109/CIPE.1996.612341","DOIUrl":"https://doi.org/10.1109/CIPE.1996.612341","url":null,"abstract":"A technique to evaluate the dynamic performance of control principles for PWM-converter systems is presented. In the modelling of vector-controlled, grid-flux-oriented control systems, nonlinear switches and time-varying elements due to coordinate transformation occur in the feedback loop. By using space-vector averaging, coordinate transformations and nonlinear switches are avoided. A linear time-invariant analytical model in the grid-flux-oriented dq-frame is derived. Simulations with a switched PWM-model and an analytical model show accurate transient response and frequency response.","PeriodicalId":126938,"journal":{"name":"5th IEEE Workshop on Computers in Power Electronics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1996-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122238510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1996-08-11DOI: 10.1109/CIPE.1996.612333
K. Sridhar
Monte-Carlo synthesis techniques can be used to design new and complex systems that best meet a certain objective function with relative ease. Monte-Carlo synthesis is inefficient and does not provide obvious convergence measures. Accelerators based on probability distribution function shading and discriminant vector analysis are proposed. Convergence measures based on cluster identification and a statistical criterion are proposed. These enhancements are shown to significantly improve the performance of Monte-Carlo synthesis techniques. The implementation of these enhancements is shown through an example.
{"title":"Accelerators and convergence measures for Monte-Carlo synthesis techniques","authors":"K. Sridhar","doi":"10.1109/CIPE.1996.612333","DOIUrl":"https://doi.org/10.1109/CIPE.1996.612333","url":null,"abstract":"Monte-Carlo synthesis techniques can be used to design new and complex systems that best meet a certain objective function with relative ease. Monte-Carlo synthesis is inefficient and does not provide obvious convergence measures. Accelerators based on probability distribution function shading and discriminant vector analysis are proposed. Convergence measures based on cluster identification and a statistical criterion are proposed. These enhancements are shown to significantly improve the performance of Monte-Carlo synthesis techniques. The implementation of these enhancements is shown through an example.","PeriodicalId":126938,"journal":{"name":"5th IEEE Workshop on Computers in Power Electronics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1996-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116215565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1996-08-11DOI: 10.1109/CIPE.1996.612353
J. Svensson
The design, analysis and simulation of a power angle controlled voltage source inverter in a wind energy application are addressed. By controlling both the phase displacement angle and voltage amplitude, the performance of the conversion system is improved compared with the traditional power angle control. The system becomes a multiple-input and multiple-output system preferably controlled by the linear quadratic method. To reduce harmonics and noise, a Kalman estimator is applied to the input signals of the controller. When state equations are used, the inverter system as well as the feedback and feedforward parameters are easy to handle by using the Matlab/Simulink program. The simulation results show that the proposed control method and its implementation function adequately.
{"title":"Simulation of power angle controlled voltage source converter using a linear quadratic method in a wind energy application","authors":"J. Svensson","doi":"10.1109/CIPE.1996.612353","DOIUrl":"https://doi.org/10.1109/CIPE.1996.612353","url":null,"abstract":"The design, analysis and simulation of a power angle controlled voltage source inverter in a wind energy application are addressed. By controlling both the phase displacement angle and voltage amplitude, the performance of the conversion system is improved compared with the traditional power angle control. The system becomes a multiple-input and multiple-output system preferably controlled by the linear quadratic method. To reduce harmonics and noise, a Kalman estimator is applied to the input signals of the controller. When state equations are used, the inverter system as well as the feedback and feedforward parameters are easy to handle by using the Matlab/Simulink program. The simulation results show that the proposed control method and its implementation function adequately.","PeriodicalId":126938,"journal":{"name":"5th IEEE Workshop on Computers in Power Electronics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1996-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127834788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1996-08-11DOI: 10.1109/CIPE.1996.612331
R. Kaglawala, S. Venkata, P. Lauritzen, A. Sundaram, R. Adapa
This paper describes a new technique to model power converters. The resulting power converter model is referred to as a transient behavioral model (TBM). First, a simple buck power converter is used to demonstrate the TBM. A power converter called the dynamic voltage restorer is used to demonstrate a practical application of the TBM. It is shown that the TBM yields simulation results almost as accurate as the ideal switch model (ISM). At the same time, the TBM is computationally more efficient than the ISM. These features, coupled with the simplicity and the ease of implementation in a standard circuit simulator, make the TBM an attractive alternative to the ISM.
{"title":"A transient behavioral model (TBM) for power converters","authors":"R. Kaglawala, S. Venkata, P. Lauritzen, A. Sundaram, R. Adapa","doi":"10.1109/CIPE.1996.612331","DOIUrl":"https://doi.org/10.1109/CIPE.1996.612331","url":null,"abstract":"This paper describes a new technique to model power converters. The resulting power converter model is referred to as a transient behavioral model (TBM). First, a simple buck power converter is used to demonstrate the TBM. A power converter called the dynamic voltage restorer is used to demonstrate a practical application of the TBM. It is shown that the TBM yields simulation results almost as accurate as the ideal switch model (ISM). At the same time, the TBM is computationally more efficient than the ISM. These features, coupled with the simplicity and the ease of implementation in a standard circuit simulator, make the TBM an attractive alternative to the ISM.","PeriodicalId":126938,"journal":{"name":"5th IEEE Workshop on Computers in Power Electronics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1996-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124054962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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