Title:
ELEVATOR CONTROL DEVICE AND CONTROL DEVICE FOR POWER CONVERTER
Document Type and Number:
WIPO Patent Application WO/1998/025849
Kind Code:
A1
Abstract:
In an elevator adapted to be driven by a converter connected to a system power source, a smoothing capacitor for smoothing an output of the converter, a PWN inverter for converting voltage of the smoothing capacitor into an alternating current of variable frequency and variable voltage, and a motor supplied by the inverter with power, an elevator control device comprises a solar battery, a capacitor of large capacity power of at least several Farads capable of accumulating an instantaneous output power generated by the solar battery, and output voltage regulating means for regulating an output voltage of the capacitor, and the elevator control device acts to feed generated power of the solar battery into the smoothing capacitor and enables a voltage control system of the converter to use energy generated by the solar battery as energy for operation of the elevator and automatically return surplus energy to a commercial power source.
More Like This:
| WO/1997/003913 | CORROSION INHIBITOR FOR ALKANOLAMINE UNITS |
Inventors:
MUTOH NOBUYOSHI (JP)
HOKARI SADAO (JP)
HOKARI SADAO (JP)
Application Number:
PCT/JP1996/003613
Publication Date:
June 18, 1998
Filing Date:
December 11, 1996
Export Citation:
Assignee:
HITACHI LTD (JP)
MUTOH NOBUYOSHI (JP)
HOKARI SADAO (JP)
MUTOH NOBUYOSHI (JP)
HOKARI SADAO (JP)
International Classes:
B66B1/00; B66B1/30; (IPC1-7): B66B1/30; B66B1/34
Foreign References:
| JPH04272073A | 1992-09-28 | |||
| JPH0349268U | 1991-05-14 | |||
| JPH08208140A | 1996-08-13 |
Attorney, Agent or Firm:
Ogawa, Katsuo (5-1, Marunouchi 1-chom, Chiyoda-ku Tokyo 100, JP)
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