Power control system for a battery driven elevator

• US 11,014,786 B2
• Filed: 02/21/2018
• Issued: 05/25/2021
• Est. Priority Date: 02/22/2017
• Status: Active Grant

• Current Assignee: Otis Elevator Company (Otis Worldwide Corp.)
• Original Assignee: Otis Elevator Company (Otis Worldwide Corp.)
• Inventors: Agirman, Ismail, Dehmlow, Marvin, Fischer, Bernd, Mezzadri, Carlo
• Primary Examiner(s): Fletcher, Marlon T
• Application Number:
  US15/900,979
• Publication Number:
  US 20180237268A1
• Time in Patent Office: 1,189 Days
• CPC Class Codes: B66B 1/302 for energy saving
• CPC Class Codes: B66B 11/043 actuated by rotating motor; Details, e.g. ventilation roping on drum, sheave, winch or pulley B66B11/0065; power supply or control B66B1/28, H02P; motor construction H02K
• CPC Class Codes: H02J 2207/20 Charging or discharging characterised by the power electronics converter
• CPC Class Codes: H02J 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: H02J 7/0068 Battery or charger load switching, e.g. concurrent charging and load supply H02J7/0013 takes precedence
• CPC Class Codes: H02P 27/06 using dc to ac converters or inverters H02P27/05 takes precedence
• CPC Class Codes: H02P 3/22 by short-circuit or resistive braking
• CPC Class Codes: Y02B 50/00 Energy efficient technologies in elevators, escalators and moving walkways, e.g. energy saving or recuperation technologies
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

The subject-matter disclosed relates to a power control system (10) for a battery driven elevator; the power control system (10) comprising a DC battery (16) for providing electrical power to an electric motor (24) of the elevator system; and a power controller (22) including a power converter (26), an power inverter (28), and a DC intermediate circuit (30) connected in between the power converter (26) and the power inverter (28); wherein an output of the DC battery (16) is connected to the DC intermediate circuit (30).

Claims

1. A power control system for a battery driven elevator;

the power control system comprising;

a battery charger having an input configured to be connected to a source of main power;

a DC battery connected to an output of the battery charger, the DC battery for providing electrical power to an electric motor of the elevator system; and

a power controller including a power converter, a power inverter, and a DC intermediate circuit connected in between the power converter and the power inverter;

wherein an output of the DC battery is connected to the DC intermediate circuit;

at least one additional power storage device connected to an input of the power converter.

2. The power control system according to claim 1, wherein the power controller is a regenerative power controller the power converter of which is made up with active power switching elements.

3. The power control system according to claim 1, wherein the additional power storage device comprises a supercapacitor.

4. The power control system according to claim 1, further comprising a braking resistor connected to an input of the power converter.

5. The power control system according to claim 4, wherein the braking resistor is connected in parallel to the additional power storage device.

6. The power control system according to claim 1, wherein the power converter is configured as a DC/DC converter.

7. The power control system according to claim 1, wherein the DC battery is connected to an electric power supply via a charger circuit;

and/or wherein the DC battery is connected to the DC intermediate circuit via a DC/DC converter.

8. A battery driven elevator comprising an electric motor for driving an elevator car between landings;

and the power control system according to claim 1.

9. A method of assembling a power control system for a battery driven elevator comprising:

providing a DC battery,

providing a power controller comprising a power converter, a power inverter at least one additional power storage device connected to an input of the power converter, and a DC intermediate circuit connected in between the power converter and the power inverter;

providing a battery charger having an input configured to be connected to a source of main power;

connecting an output of the battery charger to the DC battery; and

connecting the DC battery to the DC intermediate circuit of the power controller.

10. The method according to claim 9, wherein providing a power controller comprises providing a regenerative power controller the power converter of which is made up with active power switching elements;

and the method further comprising configuring the power converter as a DC/DC converter.

11. The method according to claim 9, further comprising connecting a braking resistor to an input of the power converter.