Elevator drive

• US 9,051,157 B2
• Filed: 01/03/2013
• Issued: 06/09/2015
• Est. Priority Date: 03/16/2006
• Status: Expired due to Fees

• Current Assignee: Thyssenkrupp Elevator AG (TK Elevator Corporation)
• Original Assignee: Thyssenkrupp Elevator AG (TK Elevator Corporation)
• Inventors: Schulze, Jochen, Vogler, Eberhard, Wilhelm, Andreas, Gessner, Torsten, Hermann, Gunther, Jetter, Markus, Mollgaard, Nils-Anton, Resag, Uwe, Breidenstein, Olaf
• Primary Examiner(s): Chan, Kawing
• Application Number:
  US13/733,794
• Publication Number:
  US 20140020985A1
• Time in Patent Office: 887 Days
• Field of Search: 187/250, 187/276, 187/277, 187/288
• US Class Current: 1/1
• CPC Class Codes: B66B 1/308 with AC powered elevator drive
• CPC Class Codes: B66B 11/0438 with a gearless driving, e.g. integrated sheave, drum or winch in the stator or rotor of the cage motor
• CPC Class Codes: B66B 5/16 Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
• CPC Class Codes: H02K 11/33 Drive circuits, e.g. power electronics H02K11/38 takes precedence
• CPC Class Codes: H02K 16/04 Machines with one rotor and two stators
• CPC Class Codes: H02K 2201/15 Sectional machines
• CPC Class Codes: H02K 3/28 Layout of windings or of connections between windings windings for pole-changing H02K17/06, H02K17/14, H02K19/12, H02K19/32
• CPC Class Codes: H02K 5/225 Terminal boxes or connection arrangements specially adapted for submersible motors H02K5/132
• CPC Class Codes: H02P 25/22 Multiple windings; Windings for more than three phases
• CPC Class Codes: H02P 27/06 using dc to ac converters or inverters H02P27/05 takes precedence

Abstract

A method for monitoring a brake which is operated by a spring force and a device for monitoring the force, comprising the steps of taking into account a force which is required to load or bias at least one spring by means of the device for monitoring the force.

Claims

1. A method for monitoring a brake which is operated by a spring force, comprising the steps of:

taking into account a value which is required to load or bias at least one spring to a biased state, the biased state corresponding to a limit position;

indicating when the at least one spring reaches the limit position; and

comparing the value required to reach the limit position with a predetermined value.

2. The method as claimed in claim 1, wherein the taking into account a value includes taking into account a force which is required for the at least one spring to reach the limit position.

3. The method as claimed in claim 2, wherein the brake is a hydraulically ventilated brake having an oil-pressure/time profile and further comprising the step of detecting or checking the profile in the limit position whether the force required to reach the limit position corresponds to a predetermined value.

4. The method as claimed in claim 3, and further comprising the step of checking an oil pressure in the hydraulically ventilated brake directly or indirectly.

5. The method as claimed in claim 1, and further comprising the step of checking the limit position by means of a device.

6. The method as claimed in claim 1, wherein loading or biasing the at least one spring is implemented electromechanically, electrically, mechanically, pneumatically or hydraulically.

7. The method as claimed in claim 1, and further comprising the step of using the method on an elevator drive or an electric motor.

8. The method as claimed in claim 1, wherein the step of indicating is implemented with a limit switch.

9. A braking device for an elevator installation, comprising:

at least one spring for providing spring force for operating the braking device;

a device for monitoring a value which is required to load or bias the at least one spring to a biased state, the biased state corresponding to a limit position;

an indicator coupled to the device to indicate when the at least one spring reaches the limit position; and

the device is configured to compare the value at the limit position with a predetermined value.

10. The braking device as claimed in claim 9, wherein the value is a force which is required to load the at least one spring to the biased state.

11. The braking device as claimed in claim 9, wherein:

the brake is hydraulically ventilated; and

the value is oil pressure required to load the at least one spring to the biased state.

12. The braking device as claimed in claim 11, wherein

the brake includes an oil-pressure/time profile;

and

the device is configured to check the profile at the limit position for oil pressure required to load the at least one spring to the biased state.

13. The braking device as claimed in claim 12, wherein the device is configured to check the profile for time required for the at least one spring to reach the limit position.

14. The braking device as claimed in claim 9, wherein the indicator includes a limit switch.

15. An elevator drive, comprising:

a braking device comprising at least one spring for providing spring force for operating the braking device;

a device for monitoring a value which is required to load or bias the at least one spring to a biased state, the biased state corresponding to a limit position;

an indicator coupled to the device to indicate when the at least one spring reaches the limit position; and

the device is configured to compare the value at the limit position with a predetermined value.