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Modern Pulse Width Modulation (PWM) inverter output voltage produces electrical stresses on the windings of induction machines due to fast rise times. The feeder cable of this type of arrangement produces additional stresses on the windings. This paper proposes an optimized filtering technique to mitigate the transient overvoltages and reduce the associated stresses. Multi-objective optimization algorithms...
Network equivalents are used to reduce the size of electrical systems that can be difficult to solve due to computational constraints. They are also useful for cases in which it is sufficient to model in detail only a portion of the system that is relevant for the study to be performed. The purpose of this work is to apply Kron's reduction method in combination with frequency domain modeling techniques...
AC induction machines are exposed to fast-front pulses when fed from frequency converters. This type of excitation produces additional dielectric stress in the machine's insulation system which can result in premature deterioration or even failure. In this work, a non-uniform transmission line modeling approach is used in combination with FEM-based parameter computation to predict the transient voltage...
Winding models based on transmission line theory are commonly used to predict the transient voltage distribution along machine coils. During a fast transient, the highest overvoltages and dielectric stresses usually appear on the first coil. Therefore, most computer models available consider only one coil and approximate the remaining of the winding by means of a constant lumped element. In this paper,...
AC rotating machines are exposed to fast-front pulses when fed from frequency converters. This type of excitation produces dielectric stress in the machine's insulation system that can result in premature deterioration or even failure. A nonuniform transmission line model is described and applied in this paper to predict the transient voltage distribution in a machine coil under steep-fronted surge...
We propose a hybrid fuzzy PID control system to prevent overshoot and oscillations in DC-DC buck-boost converter for solar-battery system. We designed and simulated a PID, a Fuzzy logic controller, and a hybrid fuzzy PID control system to stabilize the output voltage of the buck-boost converter. The performance results using dynamic response parameters of these controllers such as rise time, overshoot,...
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