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- W2890719889 abstract "Abstract An AC voltage regulator of the chopper-type presents an attractive alternative for AC voltage control. This is attributed to its extended range of control coupled with independence of the switching angles with respect to load phase angle. Moreover, using microprocessors to determine firing instances makes it possible to change regulator’s ON and OFF periods at will with appreciable ease. This adds a new merit for this type of controllers since it would be possible to alter the magnitudes of harmonics present in load voltage or even eliminating selected orders. In this paper the values of switching angles yielding minimum harmonic content in load current are determined. Profiles of these angles at different values of load phase angle are presented for cases of output load voltage with three, five and seven pulses per haf cycle. Optimal values of switching angles are evaluated using an algorithm based on optimization technique of the direct search method. Validity of the results obtained is confirmed by comparing it with relevant values obtained by direct manipulation for the possible combinations of switching angles. Experimental results obtained from a microprocessor-controlled AC chopper confirming the theoretical analysis are presented. The approach presented is general and can be well extended for harmonic minimization with any number of pulses per half cycle and specific values of load phase angle." @default.
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- W2890719889 date "1994-01-01" @default.
- W2890719889 modified "2023-09-27" @default.
- W2890719889 title "Harmonic Minimization in a Chopper-type AC Voltage Controller" @default.
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- W2890719889 doi "https://doi.org/10.1016/s1018-3639(18)30608-1" @default.
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