Levent U. Gökdere

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A passivity-based controller, which takes into account saturation of the magnetic material in the main flux path of the induction motor, is developed to provide close tracking of time-varying speed and flux trajectories in the high magnetic saturation regions. The proposed passivity-based controller is experimentally verified. Also, a comparison between the(More)
 Applications of the Virtual Test Bed (VTB) to a power electronic circuit and an electric drive system are described. The VTB is a software environment that has been developed for design, analysis, and virtual prototyping of large-scale multi-technical systems. It has the capability of integrating models, which have been created in a variety of languages(More)
A virtual prototype of a hybrid electric vehicle (HEV) is created within the Virtual Test Bed (VTB) environment, which has been developed for modeling, simulation, analysis and virtual prototyping of large-scale multi-technical dynamic systems. Attention is focused on the electric system, which is composed of (i) a fuel cell system as a prime power source,(More)
A new modeling and simulation tool, the Virtual Test Bed (VTB), is introduced. The VTB is a software environment that has been developed for design, analysis, and virtual prototyping of large-scale multi-technical systems. It has the capability of integrating models, which have been created in a variety of languages such as SPICE, ACSL ®, and SABER ®, into(More)
 Hybrid Electric Vehicles (HEVs) are the subject of many designs and simulations. The uniqueness of the proposed hybrid electric vehicle is its combination of an energy source (fuel cell system) with two storage devices (a battery bank and a super capacitor). This research focuses on optimization of the electrical system by use of a simulation model. As a(More)
A simulation model for a hybrid electric vehicle is developed. Permanent magnet synchronous motor is considered for the drive part of the hybrid electric vehicle which comprises three energy sources: (i) a fuel cell, (ii) a battery bank, and (iii) a super capacitor. Rotor-oriented speed controller is designed, and also verified by simulation results, to(More)
We describe here the use of power converter models, created originally in the simulation languages of ACSL® and SABER®, within the Virtual Test Bed (VTB). The VTB is a modeling and simulation software which is be ing developed for design and performance analysis of large-scale electric power systems. One of the most important features of the VTB is its(More)