Elevator Including Elevator Rescue System
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Accused Products
Abstract
Elevator comprising a car, a drive motor driving the car, a motor drive unit for controlling the drive motor and supplying power thereto, an encoder for sensing movement of the car, and an elevator rescue system for rescue operation in case of an emergency situation, wherein the elevator comprises one single encoder only for normal and rescue operation.
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Citations
21 Claims
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1-11. -11. (canceled)
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12. An elevator comprising:
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a car; a drive motor for driving the car; a motor drive unit for controlling the drive motor and supplying power thereto; an encoder for sensing movement of the car; an elevator rescue system for rescue operation in case of an emergency situation, wherein the motor drive unit receives generator power from the drive motor when the drive motor operates in generator mode; and wherein the motor drive unit is adapted to derive information on the movement of the car based on the power as supplied to or received from the drive motor in the powered mode and the generator mode, respectively, of the drive motor and wherein the elevator rescue system is adapted to continue travel of the car in the case an encoder failure occurs by using the information on the movement of the car as derived by the motor drive unit for controlling such travel. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A method for performing an elevator rescue run in case of occurrence of an encoder failure, while the elevator car is traveling, wherein the elevator comprises a car, a drive motor, a motor drive unit for controlling the drive motor and supplying power thereto, an encoder for sensing movement of the car, wherein the motor drive unit receives generator power from the drive motor when the drive motor operates in generator mode, and wherein the motor drive unit is adapted to derive information on the movement of the car based on the power as supplied to or received from the drive motor in the powered mode and the generator mode respectively, of the drive motor, comprising the following steps:
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(a) identifying an encoder failure; and (b) continuing travel of the car and using the information on the movement of the car as derived by the motor drive unit for controlling such travel. - View Dependent Claims (20, 21)
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Specification