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Direct cooled switching module for electric vehicle propulsion system

  • US 5,504,378 A
  • Filed: 06/10/1994
  • Issued: 04/02/1996
  • Est. Priority Date: 06/10/1994
  • Status: Expired due to Term
First Claim
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1. Apparatus for cooling a switching circuit for an electric vehicle, wherein the switching circuit has at least two switching elements connected in series, the apparatus comprising:

  • a first heat sink having two thermally-conductive planar members forming a passage therebetween for channeling cooling fluid, an inlet port in communication with the passage, and an outlet port in communication with the passage;

    a second heat sink having two thermally-conductive planar members forming a passage therebetween for channeling cooling fluid, an inlet port in communication with the passage, and an outlet port in communication with the passage;

    means for mounting at least one switching element to the first heat sink and means for mounting at least one switching element to the second heat sink;

    means for connecting the switching element attached to the first heat sink in series with the switching element attached to the second heat sink; and

    means, coupled to the inlet and outlet ports of the first and second heat sinks, for circulating cooling fluid through the passages of the first and second heat sinks to cool the switching elements.

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