{
  "$type": "site.standard.document",
  "description": "The present invention relates to a rubber-tyred gantry container crane utilizing a supercapacitor, which comprises hoisting mechanism, trolley traverse and gantry travel. The three-phase AC current generated by the diesel generating set is converted to a DC electric power through a rectifying…",
  "path": "/patents/1073314",
  "publishedAt": "2005-10-19T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B66C13/12",
    "SHANGHAI ZHENHUA PORT MACH CO [CN]"
  ],
  "textContent": "The present invention relates to a rubber-tyred gantry container crane utilizing a supercapacitor, which comprises hoisting mechanism, trolley traverse and gantry travel. The three-phase AC current generated by the diesel generating set is converted to a DC electric power through a rectifying device of an AC transducer. The DC power is converted to a AC electric power, the frequent and voltage of which are controllable, through a frequency conversion device of a AC transducer, for driving the hoisting mechanism, gantry travel or trolley traverse. The supercapacitor is connected in parallel on a DC power bus, which monitors the scope of voltage change, and charges when voltage rises and discharges when voltage drops. With continuously discharging of the supercapacitor, its end voltage drops and the voltage of DC power bus follows to drop. When it is detected that this voltage is lower than the rectifying voltage of power of the diesel generating set, the diesel generating set starts participating in supplying electricity. When operating mechanism is at the state of regeneration-feedback, the mechanism feeds back the energy on DC bus, making the supercapacitor continuously absorb electric energy. The present invention utilizes the supercapacitor having great capacity, so as to charge and discharge in great current within a short period: quickly discharging in great current when starting and quickly charging in great current when dropping for absorbing energy and acting as function of saving energy and safeguarding environment.",
  "title": "A RUBBER TYRED GANTRY CONTAINER CRANE WITH A SUPERCAPACITOR"
}