Power control system for a battery driven elevator

Patent metadata

Field	Value
Publication number	US-11014786-B2
Application number	US-201815900979-A
Country	US
Kind code	B2
Filing date	Feb 21, 2018
Priority date	Feb 22, 2017
Publication date	May 25, 2021
Grant date	May 25, 2021

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).

First claim

What is claimed is:

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.

Assignees

• Otis Elevator Co

Inventors

• Agirman Ismail
• Dehmlow Marvin
• Fischer Bernd
• Mezzadri Carlo

Classifications

• H02J7/865

  Battery or charger load switching, e.g. concurrent charging and load supply (H02J7/50 takes precedence) · CPC title

• H02P3/14

  by regenerative braking · CPC title

• H02J7/345

  using capacitors as storage or buffering devices · CPC title

• B66B1/3423 Primary

  Control system configuration, i.e. lay-out · CPC title

• Y02B50/00

  Energy efficient technologies in elevators, escalators and moving walkways, e.g. energy saving or recuperation technologies · CPC title