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- W2895971926 abstract "Modern power systems include a considerable amount of power electronic converters related to the introduction of renewable energy sources, high-voltage direct current (HVDC) systems, adjustable speed drives, and so on. These components introduce repetitive pulses generated by the commutation of semiconductor switches, resulting in overvoltages with very steep fronts and high dielectric stresses. This phenomenon is one of the main causes of accelerated insulation aging of motors in power electronic-based systems. This chapter presents state-of-the-art computational tools for the analysis of motor windings excited by fast-front pulses related to the use of frequency converters based on pulse-width modulation (PWM). These tools can be applied for the accurate prediction of overvoltages and dielectric stresses required to propose insulation design improvements. In the case of the stress-grading system used in medium-voltage (MV) motors, transient finite-element method (FEM) is used to study the effect of fast pulses. It is shown how, by controlling the material properties and the design of the stress-grading systems, solutions to reduce the adverse effects of fast pulses from PWM-type inverters can be proposed." @default.
- W2895971926 created "2018-10-26" @default.
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- W2895971926 date "2018-10-17" @default.
- W2895971926 modified "2023-10-01" @default.
- W2895971926 title "Modeling and Simulation of Rotating Machine Windings Fed by High-Power Frequency Converters for Insulation Design" @default.
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- W2895971926 doi "https://doi.org/10.5772/intechopen.78064" @default.
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