| 摘要 |
A transformer based voltage optimization apparatus 201 is used in an electrical circuit comprising a load 202 and comprises a first transformer 203, to transform received electrical current at a first alternating voltage 204 into second voltage 205, and a second transformer arrangement 207 configured to reduce a frequency component of the received electrical current that constitutes electrical noise. Transformer 203 can be a buck-boost transformer, increase or decrease voltage and include insulated primary and secondary windings. Transformer arrangement 207 can be a third winding either wound on the same core or on a separate core, separately housed, and be a zero sequence harmonic or zig-zag winding. Plural frequency components can be reduced, including harmonics of the received current, and their frequency selected or adjusted. The received current can be split into current phases, by phase shifting, and shifted by 180 degrees to cancel each other out. Harmonics emanating from noise sources such as information technology equipment, high frequency lighting and variable speed drives can be reduced, increasing the life and efficiency of voltage optimizing equipment.
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