{
  "$type": "site.standard.document",
  "description": "The apparatus for charging an energy storage system (ESS) (235) from an AC line voltage (205) includes a boost stage (220) for converting the AC line voltage to a first ESS charging voltage; an isolation stage (225,230), coupled to the boost stage, for converting the first ESS charging voltage to a…",
  "path": "/patents/998334",
  "publishedAt": "2012-09-12T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H02J7/00",
    "TESLA MOTORS INC [US]"
  ],
  "textContent": "The apparatus for charging an energy storage system (ESS) (235) from an AC line voltage (205) includes a boost stage (220) for converting the AC line voltage to a first ESS charging voltage; an isolation stage (225,230), coupled to the boost stage, for converting the first ESS charging voltage to a second ESS charging voltage with the second ESS charging voltage less than the first ESS charging voltage, the isolation stage removing a common mode current between the ESS and the boost stage; a configurator (250), responsive to a control signal, to set a direct communication of the first ESS charging voltage to the ESS in a bypass mode and to open the direct communication of the first ESS charging voltage to the ESS in an isolation mode; and a controller, coupled to the configurator, for setting the modes responsive to a battery voltage, a peak of the AC line voltage, and a total leakage current at an input of the AC line voltage, the controller asserting the control signal to the configurator.",
  "title": "Charging efficiency using selectable isolation"
}