Door operating arrangement in an elevator

Patent metadata

Field	Value
Publication number	US-11279595-B2
Application number	US-201815971415-A
Country	US
Kind code	B2
Filing date	May 4, 2018
Priority date	May 29, 2017
Publication date	Mar 22, 2022
Grant date	Mar 22, 2022

Abstract

A door operating arrangement in an elevator, including a door operating unit located in the elevator car including a door controller and a door drive as well as a door motor configured to open and close elevator car doors, optionally together with elevator landing doors, a DC bus connecting the door operating unit via a travelling cable of the elevator car with a DC power source of the elevator. The voltage level of the DC bus is between 40 V and 120 V, the DC bus is connected to a capacitor bank located in the elevator car having a parallel connection of at least two capacitors and a total capacity value of at least 75.000 μF, preferably at least 100.000 μF.

First claim

The invention claimed is:

1. A door operating arrangement in an elevator, comprising:
a door operating unit located in an elevator car of the elevator, the door operating unit including:
a door controller;
a door motor configured to open and close car doors of the elevator car, the door motor being an AC motor with an operating range of 18V to 60V; and
a door drive, wherein the door drive comprises an inverter bridge connected with phases of the door motor, the inverter bridge being controlled by the door controller;

a DC bus directly electrically connected to the door drive to connect the door operating unit with a DC power source of the elevator, the DC bus running in a travelling cable of the elevator car;
a DC module; and
a capacitor bank connected directly between the DC module and the door operating unit and provided in the elevator car, the capacitor bank having a parallel connection of at least two capacitors and a total capacity value of at least 75,000 μF,
wherein the voltage level of the DC bus is more than 40 V, and
wherein the DC bus is connected to the capacitor bank.

2. The door operating arrangement according to claim 1 , wherein the voltage level of the DC bus is between 40V and 120 V.

3. The door operating arrangement according to claim 1 , wherein the distance from the capacitor bank to the door operating unit is no longer than 1 m.

4. The door operating arrangement according to claim 1 , wherein the capacitor bank is located on a same circuit board as the door drive.

5. The door operating arrangement according to claim 1 , wherein the voltage level of the DC bus is between 40 V and 60 V.

6. The door operating arrangement according to claim 1 , wherein the capacity value of the capacitor bank is between 100.000 μF and 300,000 μF.

7. The door operating arrangement according to claim 1 , wherein the DC power source is a DC link of a frequency converter of a motor drive of the elevator.

8. The door operating arrangement according to claim 1 , wherein the DC module is fixed in a building and comprises a DC converter converting the voltage of the DC power source on a primary side thereof to a DC voltage on a secondary side thereof between 40V and 120 V.

9. The door operating arrangement according to claim 8 , wherein the DC converter is at the secondary side connected to a smoothing circuit.

10. The door operating arrangement according to claim 1 , wherein the door controller comprises a rescue circuit for operating the elevator car door and optionally the landing doors in abnormal operating situations via a switch located in connection with the elevator car and/or the elevator control panel.

11. An elevator comprising the door arrangement according to claim 1 .

12. The door operating arrangement according to claim 1 , wherein the voltage level of the DC bus is between 50V and 120 V.

13. The door operating arrangement according to claim 1 , wherein the voltage level of the DC bus is between 55V and 120 V.

14. The door operating arrangement according to claim 1 , wherein the distance from the capacitor bank to the door operating unit is no longer than 50 cm.

15. The door operating arrangement according to claim 1 , wherein the voltage level of the DC bus is between 50 V and 60 V.

16. The door operating arrangement according to claim 1 , wherein the voltage level of the DC bus is between 55 V and 60 V.

17. The door operating arrangement according to claim 1 , wherein the capacity value of the capacitor bank is between 120,000 and 200,000 μF.

18. The door operating arrangement according to claim 1 , wherein the DC module is fixed in a building and comprises a DC converter converting the voltage of the DC power source on a primary side thereof to a DC voltage on a secondary side thereof between 40V and 60 V.

Assignees

• Kone Corp

Inventors

• Raassina Pasi
• Lahtinen Ari-Pekka

Classifications

• B66B13/143 Primary

  electrical · CPC title

• B66B5/027

  to permit passengers to leave an elevator car in case of failure, e.g. moving the car to a reference floor or unlocking the door · CPC title

• B66B13/24

  Safety devices in passenger lifts, not otherwise provided for, for preventing trapping of passengers · CPC title

• B66B13/14 Primary

  Control systems or devices · CPC title

• B66B13/02 Primary

  Door or gate operation (of general application E05F) · CPC title