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Energy storage and hold-up method and apparatus for high density power conversion

  • US 20050254272A1
  • Filed: 04/19/2005
  • Published: 11/17/2005
  • Est. Priority Date: 02/24/2004
  • Status: Active Grant
First Claim
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114. A method of converting power from a source at a source voltage for delivery to a load at a load voltage, where the source voltage may vary between a high line voltage and a low line voltage in a normal operating range, comprising:

  • providing DC-DC voltage transformation and isolation in a first power conversion stage, the first stage having a CA input for receiving power from the source and a CA output;

    providing power regulation in a second power conversion stage having a PR input for receiving power from the CA output of the first stage, regulation circuitry, and a PR output for delivering power to the load;

    the regulation circuitry being adapted to maintain the load voltage within a regulation range while the PR input voltage remains within a normal operating range;

    providing a hold-up circuit having a charge path and a discharge path for connection to a hold-up capacitance, the discharge path providing a low impedance connection between the hold-up capacitance and the PR input for supplying power to the power regulator, the charge path providing a charge current to charge the hold-up capacitance;

    configuring the hold-up circuit to charge the hold-up capacitance when a first predetermined condition is satisfied and to provide power to the PR input when a second predetermined condition is satisfied.

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