Symmetrical power system

Details Symmetrical power system Symmetrical power system

1997-04-28

2000-05-09

Nguyen, Matthew

Electricity: power supply or regulation systems

Including a transformer or an inductor

H01F 1700

Patent

active

060608765

ABSTRACT:
A symmetrical ac power system provides a balanced ac output, whose maximum voltage with respect to a reference ground potential is one-half the ac output voltage, and which is derived from a single phase ac source through the use of an isolation transformer having a center-tapped secondary winding. The center tap is connected to the output power load circuit as a ground reference potential with respect to the symmetrical ac output so as to constitute the reference ground potential for the power supply and load. Since symmetrical ac power is applied to the load by the system, reactive load currents, other power artifacts, EMI and RFI emissions and other interference and noise components ordinarily resulting from the application of conventional ac power to the load are reduced or eliminated by appearing as equal inversely phased signal elements which cancel one another. In order to maximize the performance of the symmetrical power system, the isolation transformer has a bifilar-wound secondary winding.

REFERENCES:
patent: 4437147 (1984-03-01), Takamura et al.
patent: 4584637 (1986-04-01), Takamura et al.
patent: 4675801 (1987-06-01), Terada
patent: 5140705 (1992-08-01), Kosuga
patent: 5386473 (1995-01-01), Harrison
patent: 5615091 (1997-03-01), Palatnik

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