{
  "$type": "site.standard.document",
  "description": "In order to provide an electric power transmission system capable of curbing a reduction in power transmission efficiency, an electric power transmission system of the present invention, which transmits electric energy via an electromagnetic field from a power transmission antenna (140) to a power…",
  "path": "/patents/964076",
  "publishedAt": "2015-01-14T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60L53/126",
    "EQUOS RES CO LTD [JP]"
  ],
  "textContent": "In order to provide an electric power transmission system capable of curbing a reduction in power transmission efficiency, an electric power transmission system of the present invention, which transmits electric energy via an electromagnetic field from a power transmission antenna (140) to a power receiving antenna (210), is characterized by including: an inverter unit (130) that converts DC voltage to AC voltage of a predetermined frequency to output; a power transmission-side control unit (150) that controls a drive frequency of the inverter unit (130) and a voltage value of DC voltage input to the inverter unit (130), and controls in such a way that a power value output from the inverter unit (130) is kept at a constant level; the power transmission antenna (140) to which AC voltage is input from the inverter unit (130); a rectifying unit (220) that rectifies an output of the power receiving antenna (210) to obtain DC voltage, and outputs the DC voltage; a step-up and step-down unit (230) that steps up or down DC voltage output from the rectifying unit (220) to output; a battery that is charged with an output of the step-up and step-down unit (230) ; and a power receiving-side control unit (250) that controls the step-up and step-down unit (230) in such a way as to charge the battery with a maximum power value.",
  "title": "POWER TRANSMISSION SYSTEM"
}