Controller of elevator

• US 20010017240A1
• Filed: 02/21/2001
• Published: 08/30/2001
• Est. Priority Date: 02/28/2000
• 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 6,415,892 B2
• Time in Patent Office: Days
• US Class Current: 187/290
• CPC Class Codes: B66B 1/302 for energy saving
• CPC Class Codes: Y02B 50/00 Energy efficient technologies in elevators, escalators and moving walkways, e.g. energy saving or recuperation technologies

Abstract

This invention provides a controller of an elevator in which a space for mounting a power accumulating device can be saved and the controller can be applied to the elevator having no machine room. Therefore, the controller has power accumulating means arranged between DC buses between a converter and an inverter, and accumulating DC power from the DC buses at a regenerative operation time of the elevator and supplying the DC power accumulated on the DC buses at a power running operation time; and charging-discharging control means for controlling charging and discharging operations of the power accumulating means with respect to the DC buses. The power accumulating means is constructed by a secondary battery and a DC-DC converter for controlling charging and discharging operations of the secondary battery, and the secondary battery is constructed by connecting plural cells in series to each other. The secondary battery is arranged at any one of four corners within an ascending/descending path, a portion near a rail, or a portion near a cable within the ascending/descending path.

Claims

1. A controller of an elevator comprising:

a converter for rectifying AC power from an AC power source and converting the AC power to DC power;

an inverter for converting the DC power to AC power of a variable voltage and a variable frequency and driving an electric motor and operating the elevator;

power accumulating means arranged between DC buses between said converter and said inverter, and accumulating DC power from the DC buses at a regenerative operation time of the elevator and supplying the DC power accumulated on the DC buses at a power running operation time; and

charging-discharging control means for controlling charging and discharging operations of said power accumulating means with respect to said DC buses;

the controller being characterized in that said power accumulating means is constructed by a secondary battery and a DC-DC converter for controlling charging and discharging operations of the secondary battery, and said secondary battery is constructed by connecting plural cells in series to each other.

2. A controller of an elevator according to

claim 1

, wherein

the secondary battery of said power accumulating device is constructed by connecting plural cells in series to each other in a bar shape and arranging the cells in a vertical direction within an ascending/descending path.

3. A controller of an elevator according to

claim 1

, wherein

the secondary battery of said power accumulating device is constructed by plural set batteries such that terminal portions of the plural cells are fixedly connected to each other and female screw terminals are attached to both ends of each set battery as one set, and the plural set batteries are connected to each other in one bar shape by using a double-end stud and are stored into a cylindrical case.

4. A controller of an elevator according to

claim 1

, wherein

each of the cells of said power accumulating device is arranged with the side of a pressure safety valve facing upward.

5. A controller of an elevator according to

claim 1

, wherein

said power accumulating device is arranged in a clearance of an ascending/descending path and a car.

6. A controller of an elevator according to

claim 1

, wherein

said power accumulating device is arranged at any one of four corners within an ascending/descending path, a portion near a rail, or a portion near a cable within the ascending/descending paths

7. A controller of an elevator according to

claim 1

, wherein

a cooler for forced air cooling is arranged at any one of above, below, or both above and below of said power accumulating device.

8. A controller of an elevator according to

claim 1

, wherein

an air cooling fan for flowing a wind in a vertical direction is attached to said power accumulating device.

9. A controller of an elevator according to

claim 7

, wherein

the controller further comprises:

a temperature measuring device for measuring a temperature of said power accumulating device; and

a control device for operating said cooler when a detecting temperature of said temperature measuring device is equal to or greater than a predetermined value.

10. A controller of an elevator according to

claim 9

, wherein

said temperature measuring device measures the temperature of a side face of a cell near a terminal end on an unarranging side of said cooler, or the temperature of a side face of a cell near a center when said cooler is arranged on each of both sides.