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This paper presents a sliding mode controller for a wound rotor synchronous machine, acting as a generator for an isolated load. The standard dq-model of the machine is connected to a resistive load. A sliding surface is defined in order to fulfill control objectives, and the Ideal Sliding Dynamics is proved to be stable. From the desired surface, the standard sliding methodology is applied, and a...
We review the classical single particle theory for the Gyratron and CARM (Cyclotron Autoresonance Maser) devices. We formulate the theory in order to map the relevant equations on those of Free Electron Laser magnetic Undulator devices. The article comments on the validity of such an approach and on the possibility of exploiting the wealth of scaling rules, currently adopted in the design of FEL devices,...
In the current context of increasing global energy needs and the depletion of traditional energy sources are particularly relevant management processes and the energy use improving. To contribute to the dissemination of these processes our institution has developed a project that aims to development a set of virtual laboratories to introduce these processes to engineering students. This paper presents...
This paper presents the desired current references in order to minimize the torque ripple for a Switched Reluctance Motor. From the torque equation, and using switch on and switch off angles, the desired current waveforms are obtained. Simulations validates the study and are compared with the constant current references case.
This paper presents an energy-based model of a series hybrid electric vehicle. The proposed propulsion system has a new configuration using a wound-rotor synchronous generator (WRSM) and a doubly-fed induction machine (DFIM). From the classic dq dynamical equations of the WRSM and DFIM the port-controlled Hamiltonian models of each machine is described. One of the abilities of the port-based models...
This paper presents a new nonlinear passivity-based controller for a wound rotor synchronous machine, acting as a motor drive. From the standard dq-model the control objectives are stated, and the Port-controlled Hamiltonian model is also obtained. A simple power flow study allows to state the control goals in terms of reactive power compensation and ohmic losses reduction. Starting from the Hamiltonian...
A systematic exposition of modeling of electromechanical systems in the bond graph formalism is presented. After reviewing electromechanical energy conversion and torque generation, the core element present in any electromechanical system is introduced, and the corresponding electrical and mechanical ports are attached to it. No modulated elements are necessary, since the energy representation of...
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