{
  "$type": "site.standard.document",
  "description": "This invention enables a power conditioner of a photovoltaic system to operate at higher accuracy. A chopper circuit (5), a capacitor (18) connected in parallel to the chopper circuit, and a control circuit (9) for controlling ON/OFF of switch elements (10, 11) in the chopper circuit to control…",
  "path": "/patents/1009501",
  "publishedAt": "2011-09-14T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G05F1/67",
    "OMRON CO LTD [JP]"
  ],
  "textContent": "This invention enables a power conditioner of a photovoltaic system to operate at higher accuracy. A chopper circuit (5), a capacitor (18) connected in parallel to the chopper circuit, and a control circuit (9) for controlling ON/OFF of switch elements (10, 11) in the chopper circuit to control charging and discharging of the capacitor are arranged, where the control circuit (9) includes a measurement control section (9a) for measuring an inter-end voltage of the capacitor (18) and a control circuit section (9b) for performing a predetermined control operation from a measurement output of the measurement circuit section (9a); the measurement circuit section (9a) including a differential amplifier circuit (9a2) for differentially amplifying the inter-end voltage of the capacitor (18), and the circuit control section (9b) calibrating an in-phase component in the output of the differential amplifier circuit (9a2) as an in-phase error and performing the control from the calibrated output from the differential amplifier circuit (9a2).",
  "title": "Control circuit, power conditioner including the control circuit, and photovoltaic system"
}