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Harmonic Phase Shifter for Discrete Amplitude Modulation Technique | ||
| ALNAHRAIN JOURNAL FOR ENGINEERING SCIENCES | ||
| Article 1, Volume 13, Issue 1, 2010, Pages 1-12 | ||
| Authors | ||
| Dr. Mohammed Tofik Lazim; Dr. Anas Lateef Mahmood | ||
| Abstract | ||
| In discrete amplitude modulation or integral-cycle control, subharmonic and higher order harmonic components are generated in the three phases of a three phase system. These harmonic components are found to be unbalanced in phase displacement. The correction of the unbalanced phase displacement angles of a particular subharmonic or higher order harmonic for this type of triggering is investigated to solve the limitation of use of this important type of control as a drive and many other industrial applications. The multiple of 2 phase shifting technique is used to correct unbalanced phase displacement angles produced in a three-phase system. A computer-based harmonic phase corrector is designed and tested with threephase resistive and induction motor loads. It is found that there is a well agreement between the theoretical and experimental results and it is believed that the major problems associated with the integral-cycle triggering mode with three-phase circuits have been solved in the present work. | ||
| Keywords | ||
| harmonics; integral cycle control; power electronics; phase angle correction; phase shifter | ||
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