METHOD FOR OPERATING AN ELEVATOR IN AN EMERGENCY MODE
1 Assignment
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Accused Products
Abstract
Method for operating an elevator (2) in an emergency mode wherein the elevator (2) comprises a car (4), a drive motor (10), a motor drive unit (26) which supplies power to the drive motor (10) and controls the same and an emergency power supply (42), wherein the motor drive unit (10) has a predetermined normal operation switching frequency, comprising the following steps (a) supplying power from the emergency power supply (42); (b) bringing the motor drive unit ( ) in an emergency mode; (c) determining an actual emergency operation condition characteristic; and (d) setting the switching frequency of the motor drive unit (46) dependent on the actual emergency operation condition characteristic.
31 Citations
52 Claims
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1-26. -26. (canceled)
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27. Method for operating an elevator in an emergency mode wherein the elevator comprises a car, a drive motor, a motor drive unit which supplies power to the drive motor and controls the same and an emergency power supply, wherein the motor drive unit has a predetermined normal operation switching frequency, comprising the following steps:
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(a) supplying power from the emergency power supply; (b) bringing the motor drive unit in an emergency mode; (c) determining an actual emergency operation condition characteristic; and (d) setting the switching frequency of the motor drive unit dependent on the actual emergency operation condition characteristic. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
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41. Elevator comprising a ear, a drive motor, a motor drive unit, which is connected to the drive motor and which is adapted to supply power to the drive motor and to control the same, and an emergency power supply, wherein the motor drive unit has a predetermined normal operation switching frequency, and wherein the elevator is, in case of an emergency situation, adapted to
(a) receive power from the emergency power supply; -
(b) bring the motor drive unit in an emergency mode; (c) determine an actual emergency operation condition characteristic; and (d) setting the switching frequency of the motor drive unit dependent on the actual emergency operation condition characteristic. - View Dependent Claims (42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52)
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Specification