APPARATUS AND METHOD FOR REDUCING HARMONICS
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United States of America Patent
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Issued Date -
Feb 9, 2017
app pub date -
Feb 10, 2015
filing date -
Feb 24, 2014
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Abstract
The present invention provides systems and methods for reducing harmonics, for example when using an AC to AC converter to drive a load such as a motor drive. In a first embodiment, a plurality of AC/DC converter stages are connected in parallel between a 3-phase AC supply and a DC link, each of said AC/DC stages including a 3-phase rectifier, with the rectifiers of the load driving circuits being configured such that the rectification of the AC supply by the load driving circuits is staggered. Blocking diodes are used to prevent current circulation from one rectifier to another.
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