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Systems and methods for extension of power supply hold-up time

  • US 10,148,185 B2
  • Filed: 11/24/2014
  • Issued: 12/04/2018
  • Est. Priority Date: 11/24/2014
  • Status: Active Grant
First Claim
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1. A voltage rectifier comprising:

  • an alternating-current-to-direct-current (AC/DC) converter configured to convert an alternating current (AC) source voltage to a first direct current (DC) voltage;

    a direct-current-to-direct-current (DC/DC) converter configured to convert the first DC voltage to a second DC voltage for delivery to a load of the voltage rectifier, wherein the DC/DC converter includes a variable inductor and is configured to, in response to a single failure of the AC source voltage, operate in a plurality of operating modes by;

    operating in a first hold-up mode in which a gain of the DC/DC converter is a first gain, and in which an inductance of the variable inductor is approximately equal to the inductance of the variable inductor in the absence of a failure of the AC source voltage; and

    in response to the load throttling its power consumption to reduce an amount of current drawn by the load, transitioning to a second hold-up mode by decreasing the inductance of the variable inductor to increase the gain of the DC/DC converter to a second gain.

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