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In this paper the aim is to minimize the total harmonic distortion (THD) in PWM inverters while suppressing chosen harmonics concurrently and maintaining the fundamental component of the output voltage at a required level. This is reformed as an optimization task and the optimal pulse patterns are accomplished using genetic algorithm (GA) optimization(More)
In synchronous motors, in the range of several mega watts, operated at low switching frequencies, it is advantageous to use off-line optimal PWM, to reduce the switching losses and undesired frequency harmonic components. But low transient performance of the system restricts the use of such commands. Considering the feed-forward structure of PWM modulators,(More)
In this study, a genetic algorithm optimization technique is applied, to minimize the total harmonic current distortion (THCD) in induction motors fed by high power inverters, based on an approximate model. That is, having defined a desired fundamental output voltage, optimal pulse patterns (switching angles) are determined to produce the fundamental output(More)
Interleaver plays a key role in the structure of turbo codes. The appropriate design of that, leads to achieve the good performance in a turbo code. Base on this fact, many researches have been done in order to design of best interleaver. Up to now, there are a variety of algorithms for design of interleaver such as Wang's algorithm. This algorithm is based(More)
The proposed current harmonic model for high-power synchronous machines is dependent on the inductances of quadrature and direct axes. Variation of these parameters, as a consequence of modification in operating point, aging and temperature rise, in-progress pulse patterns, are no longer optimal solutions for minimization of harmonic losses. On the other(More)
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