Elevator control apparatus using power controller for power storage apparatus

• US 20010008195A1
• Filed: 12/21/2000
• Published: 07/19/2001
• Est. Priority Date: 12/28/1999
• Status: Active Grant

• Current Assignee: Korea Electric Power Corporation (Government of South Korea), Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Original Assignee: Korea Electric Power Corporation (Government of South Korea), Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Inventors: Kobayashi, Kazuyuki, Araki, Hiroshi, Suga, Ikuro, Tajima, Shinobu
• Granted Patent: US 6,474,447 B2
• Time in Patent Office: Days
• US Class Current: 187/290
• CPC Class Codes: B66B 1/30 effective on driving gear , e.g. acting on power electronics, on inverter or rectifier controlled motor

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.

Claims

1. A control apparatus of an elevator, comprising:

a converter for rectifying AC electric power to be converted into DC electric power;

an inverter for inverting said 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 said power storage apparatus and a commercial power supply so as to supply the electric power to said inverter, and for controlling at least any one of said power storage apparatus and said commercial power supply in order to supply electric power which is required for said inverter.

2. An elevator control apparatus as claimed in

claim 1

wherein:

a difference power amount between a power supply amount to said inverter and a maximum power supply amount from one power supply is supplied from the other power supply.

3. An elevator control apparatus as claimed in

claim 1

wherein:

said power controller controls both a power supply amount from said power storage apparatus and a power supply amount from said commercial power supply.

4. An elevator control apparatus as claimed in

claim 1

wherein:

said power controller controls a supply ratio of a power supply amount from said power storage apparatus to a power supply amount from said commercial power supply.

5. An elevator control apparatus as claimed in

claim 1

wherein:

said power controller detects a voltage appearing on a bus line connected between the converter and the inverter so as to control a power supply amount from said power storage apparatus.

6. An elevator control apparatus as claimed in

claim 1

wherein:

said power controller limits a current value of electric power supplied from said power storage apparatus.

7. An elevator control apparatus as claimed in

claim 1

wherein:

said power controller controls a maximum value of a power supply amount from said power storage apparatus.

8. An elevator control apparatus as claimed in

claim 1

wherein:

said power controller controls a maximum value of a power supply amount from said commercial power supply.