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5th IEEE Workshop on Computers in Power Electronics

14-14 Aug. 1996

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  • 5th IEEE Workshop on Computers in Power Electronics

    Publication Year: 1996
    Request permission for commercial reuse | PDF file iconPDF (168 KB)
    Freely Available from IEEE
  • Simulation studies of a resonant link converter

    Publication Year: 1996, Page(s):90 - 96
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (516 KB)

    Simulation studies of a new scheme of a resonant link converter suitable in a wide variety of applications is presented. Features of the simulation model of the converter are described. Capabilities of a single 'C' program developed to carry out extensive simulation studies of the converter while supplying different types of loads are highlighted. Results of simulation of the converter modeled as ... View full abstract»

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  • Role of parasitic BJT in the design of DMOSFET

    Publication Year: 1996, Page(s):128 - 131
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (308 KB)

    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... View full abstract»

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  • Simulation of power angle controlled voltage source converter using a linear quadratic method in a wind energy application

    Publication Year: 1996, Page(s):157 - 162
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (440 KB)

    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 ... View full abstract»

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  • Analysis and simulation of digitally-controlled grid-connected PWM-converters using the space-vector average approximation

    Publication Year: 1996, Page(s):85 - 89
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    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... View full abstract»

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  • Integrated design of power stage and controller for switching power supplies

    Publication Year: 1996, Page(s):36 - 44
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (616 KB)

    This paper develops a method for simultaneously designing the power stage and controller for a switching power supply. The method utilizes a numerical optimization procedure which facilitates computer-aided design. It is found that better performance can be achieved than with a traditional two-step design process where the power stage and controller are designed sequentially. Optimization and simu... View full abstract»

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  • A transient behavioral model (TBM) for power converters

    Publication Year: 1996, Page(s):18 - 24
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (428 KB)

    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 acc... View full abstract»

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  • Modeling of power semiconductor devices, problems, limitations and future trends

    Publication Year: 1996, Page(s):120 - 127
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (580 KB)

    The problems and future trends of the modeling of power devices are reviewed and the different modeling methods compared as to their compromise between convenience, accuracy, numerical efficiency and accuracy in implementing physical effects. Many of the existing power device models are listed, and their main features are identified and compared View full abstract»

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  • PETS-a simulation tool for power electronics

    Publication Year: 1996, Page(s):1 - 8
    Cited by:  Papers (22)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (560 KB)

    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 ... View full abstract»

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  • On-Line computation of TJ for EV battery chargers

    Publication Year: 1996, Page(s):152 - 156
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (252 KB)

    Since electric vehicle (EV) batteries need frequent recharging, it is usually desirable to do this as rapidly as possible. In general, the charging process can be divided into two periods referred to as the “bulk“ charge and the “trickle” charge. Since the trickle charge is restricted to relatively low battery currents, the ability to reduce the charging time depends on del... View full abstract»

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  • Automatability of consistent switches state search in computer aided analysis of switched RLC networks

    Publication Year: 1996, Page(s):71 - 79
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (644 KB)

    In this paper a method for the formulation of switched RLC (SRLC) circuit equations is discussed. The method is aimed at providing a suitable data structure for time-domain simulations, supporting the automatic determination of the topology entered by SRLC nets after forced commutations of any switching device. The data structure consists in a Master-Slave Connection Matrix, defined using the comp... View full abstract»

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  • Identification of DC-DC switching converters characteristics for control systems design using interval mathematics

    Publication Year: 1996, Page(s):97 - 104
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (572 KB)

    In this paper the problem of identifying DC-DC switching converters characteristics in the presence of parameters uncertainties is dealt with. An interval mathematics (IM) approach is adopted to evaluate the interval extensions of DC conversion ratio and AC frequency response of switching converters, to be used in control systems design, accounting for the joint action of all the uncertainty sourc... View full abstract»

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  • An analytical model of power bipolar transistor for circuit simulation

    Publication Year: 1996, Page(s):132 - 135
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (200 KB)

    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 satu... View full abstract»

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  • Modeling and simulation of saturated induction motors

    Publication Year: 1996, Page(s):163 - 167
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB)

    Induction motors play an important role in constant and adjustable speed drives. This paper contributes to the development of a realistic model for an induction machine taking into account the saturation and nonlinearity to compute the energy efficiency of the machine. The authors concentrate on the steady-state analysis of a saturated induction machine and present a methodology for the evaluation... View full abstract»

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  • Power electronic circuit reliability analysis incorporating parallel simulations

    Publication Year: 1996, Page(s):45 - 51
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (452 KB)

    This paper presents and applies reliability analysis methods to power electronic circuit simulation. The focus is on the first-order reliability method (FORM). Two circuits are analyzed: an open-loop updown power converter; and a similar closed-loop circuit that is currently in mass production. The open-loop circuit provides an example from which rich quantitative data can be obtained for various ... View full abstract»

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  • Computer analysis of a power electronic system with analog-digital mixed elements

    Publication Year: 1996, Page(s):25 - 29
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (332 KB)

    This paper proposes a new efficient method which solves mixed circuit equations of a power electronic system by utilizing characteristics of not only the main and control circuits but also digital and analog elements. It consists of division of a system into groups, and scheduling of the groups. A simple power converter simulation example is analyzed and validated View full abstract»

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  • Analysis of networks with ideal switches

    Publication Year: 1996, Page(s):9 - 13
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    The paper describes SWANN, a computer program for the fast simulation of nonlinear switched analog networks. Switching elements, like diodes or transistors, can be modeled as open and short circuits. The program accepts all linear elements; nonlinear elements are modeled by cubic splines. Using a new theory, the program overcomes switching transients of ideal switches with only four integration st... View full abstract»

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  • Periodic steady-state analysis of an autonomous power electronic system by a modified shooting method

    Publication Year: 1996, Page(s):80 - 84
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB)

    This paper proposes a new periodic steady-state analysis method for an autonomous power electronic system by solving a periodic steady-state condition and a switch condition simultaneously for finding initial values. The method utilizes switching operations, which are a characteristic feature of a power electronic circuit, to express a variation of a period. There is no need to include a period T ... View full abstract»

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  • Worst case stability analysis of switching regulators using the structured singular value

    Publication Year: 1996, Page(s):105 - 112
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (688 KB)

    A method to assess the effect of component tolerances on the stability of closed loop switching regulators is given. Use of μ, the structured singular value, is made which obviates the need for time intensive Monte-Carlo simulation runs and also guarantees the assessment of the worst case condition of the system. Furthermore, through the use of newly developed software routines for μ, the ef... View full abstract»

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  • Analyzing power MOSFET breakdown voltage using simulators

    Publication Year: 1996, Page(s):136 - 141
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    A comprehensive analysis of the performance of the power MOSFET using process and device simulators is described. The power MOSFET process is simulated using TSUPREM and the simulated profile is used as an input to MEDICI to simulate the device performance. The dependence of the breakdown voltage on the device parameters, epi-layer thickness and doping concentration, and the parameter variations a... View full abstract»

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  • Simulation of distribution feeders and charger installation for the Olympic electric tram system

    Publication Year: 1996, Page(s):168 - 175
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (608 KB)

    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 ... View full abstract»

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  • A design methodology for power electronics

    Publication Year: 1996, Page(s):52 - 57
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (412 KB)

    Currently there are no computer-aided-design (CAD) tools dedicated to the design and synthesis of power electronic circuits. The design process has not been formalized, and most of the efforts in computer tools have been oriented towards simulation, neglecting other stages of the design process that can also benefit from their use. This paper presents an outline of the structure of an automated po... View full abstract»

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  • Accelerators and convergence measures for Monte-Carlo synthesis techniques

    Publication Year: 1996, Page(s):30 - 35
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (464 KB)

    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... View full abstract»

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  • On the efficacy of sampled-data modelling of switched networks

    Publication Year: 1996, Page(s):14 - 17
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB)

    The limitations of sampled-data modelling in determining the frequency response of switched networks such as switching power converters are highlighted. A general scheme for constructing small-signal difference equations used in sampled-data models is given. This scheme overcomes the limitations of current approaches used in obtaining input-to-output responses. However, in common with all other sa... View full abstract»

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  • Multi-frequency averaging of DC/DC converters

    Publication Year: 1996, Page(s):113 - 119
    Cited by:  Papers (15)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (508 KB)

    This paper presents some of the issues involved in applying frequency-selective averaging to modeling the dynamic behavior of PWM DC-DC converters. We use the boost converter as an example to show the details involved in deriving some novel averaged models and use simplifications to highlight the accuracy of the models even when traditional small-ripple conditions are not satisfied View full abstract»

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