The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 05, 2002
Filed:
Dec. 21, 2000
Shinobu Tajima, Tokyo, JP;
Hiroshi Araki, Tokyo, JP;
Ikuro Suga, Tokyo, JP;
Kazuyuki Kobayashi, Tokyo, JP;
Other;
Abstract
To reduce a total power amount required to drive an elevator by a commercial power supply during a peak power-consumption time period, for instance, afternoon in summer time, a control apparatus for this elevator is arranged by employing: a converter for rectifying AC electric power to be converted into DC electric power; and inverter for inverting the DC electric power into AC electric power having a variable voltage and a variable frequency; a motor driven by said AC electric power having the variable voltage and the variable frequency so as to operate an elevator; a power storage apparatus for charging thereinto electric power; and a power controller for using both the power storage apparatus and the commercial power supply so as to supply the electric power to the inverter, and for controlling at least any one of the power storage apparatus and the commercial power supply in order to supply electric power which is required for the inverter.