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EDI module with stabilizing DC current

  • US 7,261,802 B2
  • Filed: 07/07/2003
  • Issued: 08/28/2007
  • Est. Priority Date: 08/07/2002
  • Status: Active Grant
First Claim
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1. An electrodeionization (EDI) module purifying a fluid flow which EDI module is energized by DC power between an anode and a cathode, which converts an AC source into a stable DC current comprises:

  • a transformer coupled to the AC source which can be adjusted for providing varying AC power at an output of the transformer;

    a phase-controller for controlling operation of a rectifier base on the AC power and on a feedback signal from the DC power;

    an autotransformer for adjusting said transformer to further adjust DC voltage/current output according to fluid temperature, fluid flow rate, fluid quality, or variances in the AC source or in the construction of the EDI module.

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