Electrical power conversion system

{
  "publication_number": "US11031874B2",
  "country": "US",
  "kind": "B2",
  "title": "Electrical power conversion system",
  "abstract": "An improved electrical power conversion system converts a high voltage (HV) from a HV electrical power supply to a low voltage. The electrical power conversion system includes at least one power converter and at least one RC network connected in series. The RC network includes a plurality of resistive components and a plurality of capacitive components electrically connected in series. The at least one RC network and at least one power converter are arranged to be connected across a line potential of the HV electrical power supply.",
  "claims": [
    "1. An electrical power conversion system for converting a high voltage (HV) from an HV electrical power supply to a low voltage, the electrical power conversion system comprising: a power converter; and an RC network connected in series said power converter; said RC network including a plurality of resistive components and a plurality of capacitive components electrically connected in series; and said RC network further including high resistance drop off elements connected in parallel with said capacitive components; wherein said RC network and said power converter are connected across a line potential of the HV electrical power supply; and wherein the line potential of the HV electrical power supply is between 1 kV and 52.5 kV.",
    "2. The electrical power conversion system according to claim 1, wherein said high resistance drop off elements are high value resistors.",
    "3. The electrical power conversion system according to claim 2, wherein said high value resistors are configured to allow a trapped charge in said capacitive components to drop off said capacitive components.",
    "4. The electrical power conversion system according to claim 1, wherein said high resistance drop off elements are formed by a conductive coating on a printed circuit board holding said capacitive components.",
    "5. The electrical power conversion system according to claim 1, wherein said power converter comprises a switched mode power supply.",
    "6. The electrical power conversion system according to claim 1, wherein: said resistive components are surface mounted resistive components and said capacitive components are surface mounted capacitive components, and said surface mounted resistive components and said surface mounted capacitive components are mounted on one or more electronic circuit boards forming said RC network on said one or more electronic circuit boards.",
    "7. The electrical power conversion system according to claim 6, wherein: said surface mounted resistive components and said surface mounted capacitive components are mounted on a plurality of electronic circuit boards forming a plurality of said RC networks, wherein each one of said plurality of electronic circuit boards includes one of said plurality of said RC networks; and said plurality of electronic circuit boards are stacked and electrically interconnected forming a stacked RC network.",
    "8. The electrical power conversion system according to claim 7, wherein said power converter is mounted on a further electronic circuit board, and said further electronic circuit board forms part of said plurality of stacked electronic circuit boards.",
    "9. The electrical power conversion system according to claim 6, further comprising one or more insulated circuit board receptacles arranged to support said one or more electronic circuit boards.",
    "10. The electrical power conversion system according to claim 6, further comprising a plurality of insulated circuit board receptacles, each arranged to support one of a plurality of said electrically interconnected electronic circuit boards in a stacked configuration.",
    "11. The electrical power conversion system according to claim 1, further comprising a voltage sense module configured to measure a current flowing through said RC network and to convert the current to a sensor voltage value.",
    "12. The electrical power conversion system according to claim 11, further comprising a voltage loss correction module configured to correct the sensor voltage value based on voltage losses caused by said power converter.",
    "13. The electrical power conversion system according to claim 1, wherein said RC network and said power converter are arranged to be connected between a line connection of the HV electrical power supply and a ground connection of the HV electrical supply.",
    "14. The electrical power conversion system according to claim 1, wherein said RC network and said power converter are arranged to be connected between a first line connection of the HV electrical power supply and a second line connection of the HV electrical supply."
  ],
  "description_excerpt": "The present invention relates generally to an electrical power conversion system.\n\nIn various electrical networks there are increasing opportunities to use load electronic systems to provide improved protection, automation and communication products for use with those electrical networks. It therefore becomes necessary to provide a suitable power supply for use by the load electronic systems.\n\nIn locations where a low voltage (LV) power supply is not available, or in applications where the electronic systems are preferably floated at high voltage (HV) line potential, there may be prohibitive cost or space barriers in providing a power supply drawing its power from the HV line itself.\n\nIt will be understood that the term high voltage (HV) relates to AC voltages between 1 kV and 38 kV or between 1 kV and 52.5 kV. As an alternative, HV may relate to AC voltages between 5 kV and 38 kV. As a further alternative, HV may relate to AC voltages between 5 kV and 35 kV. As a further alternative, HV may relate to AC voltages between 1 kV and 35 kV. As yet a further alternative, it will be understood that the term HV may relate to AC voltages above 35 kV. As yet a further alternative, HV may relate to AC voltages above 38 kV or above 52.5 kV.\n\nThe problem of providing power to load electronic systems is becoming more acute as the applications for load electronic systems expand.",
  "cpc": [
    "H02M 5/06",
    "F16B 11/002",
    "F16B 2/02",
    "H02G 7/02",
    "H02M 1/00",
    "H02M 1/0009",
    "H02M 1/007",
    "H02M 2001/0009",
    "H02M 3/33546",
    "H02M 3/33553",
    "H02M 7/05",
    "H02M 7/062",
    "H05K 1/144",
    "H05K 1/167",
    "H05K 1/181",
    "H05K 2201/10015",
    "H05K 2201/10022",
    "H05K 2201/10522"
  ],
  "ipc": [
    "H02M 1/00",
    "H02M 3/335",
    "H05K 1/14",
    "H05K 1/16",
    "H05K 1/18"
  ],
  "assignees": [
    "Siemens AG"
  ],
  "inventors": [
    "Matthew HARBER",
    "David Russell Murray"
  ],
  "filing_date": "2019-09-26",
  "publication_date": "2021-06-08",
  "grant_date": "2021-06-08",
  "priority_date": "2018-09-26",
  "application_number": "US-201916583547-A",
  "family_id": "63685642",
  "cited_by_count": 0,
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}