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Hybrid system of fuel cell and superconducting magnetic energy storage device

  • US 5,519,312 A
  • Filed: 11/29/1993
  • Issued: 05/21/1996
  • Est. Priority Date: 11/29/1993
  • Status: Expired due to Fees
First Claim
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1. An apparatus for producing, storing, and delivering direct current electrical energy to a load comprised of a fuel cell with a direct current, constant voltage output, a superconducting magnetic energy storage device with a variable voltage, a first switch electrically connected between said fuel cell and said superconducting magnetic storage device, a second switch electrically connected between said fuel cell and a converter, and said converter for modifying at least one of the electrical characteristics of said direct current electrical energy, wherein:

  • (a) said converter changes the voltage of said direct current electrical energy,(b) said converter is comprised of a capacitive voltage smoothing circuit and an inductive current smoothing circuit,(c) said apparatus is comprised of means for matching said direct current, constant voltage output of said fuel cell and said variable voltage of said superconducting magnetic storage device in accordance with the formula Vs=Vf/(1-k), wherein Vs is the said voltage output of said superconducting magnetic storage device, Vf is said constant voltage output of said fuel cell, and k is a duty cycle.

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