Low-Input-Harmonics Power Supplies

摘要

This final report covers Phase I of the project. All three objectives have been successfully accomplished. They are (a) construction of a low-input-harmonics converter, (b) characterization of the input current harmonics, and (c) theoretical analysis of the input harmonics and other performances of the novel converter. Specifically, it has been shown that the 3% harmonics requirement can be met without the use of low frequency filters or phase-shifting transformers. This circuit can not perform ac to dc conversion. Pending continued funding of Phase II of this project, a 3-phase ac to dc power converter will be demonstrated. A new circuit having even lower input harmonics and much lower switching frequency noises than the circuit reported here will be constructed and characterized. Harmonics contents and stability of the power supply will be thoroughly studied. (Author)