Electrical elevator rescue system
First Claim
1. Elevator (2) comprising a car (4), a counterweight (6), a hoisting rope (8) for suspending the car (4) and the counterweight (6), a drive motor (10), a motor drive unit (26) for supplying the power to the drive motor (10), and a brake (18) for stopping the movement of the car (4) in an emergency situation, the elevator (2) further comprising an elevator rescue system (40), comprising an emergency power supply (42), an emergency brake switch (44) for connecting and disconnecting the emergency power supply (42) to the brake (18), and an emergency drive switch (46) for connecting and disconnecting the power of the emergency power supply (42) to the drive motor (10) and to the brake (18) wherein the elevator rescue system (40) further comprises the motor drive unit (26) and a power line (74) connecting the emergency power supply (42) with the motor drive unit (26) and including the emergency drive switch (46) and wherein the brake (18) and the motor drive unit (26) are coupled with each other in a way which allows energizing of the drive motor (10) only if the brake (18) is energized.
1 Assignment
0 Petitions
Accused Products
Abstract
Elevator (2) comprising a car (4), a counterweight (6), a hoisting rope (8) for suspending the car (4) and the counterweight (6), a drive motor (10), a motor drive unit (26) for supplying the power to the drive motor (10), and a brake (18) for stopping the movement of the car (4) in an emergency situation, the elevator (2) further comprising an elevator rescue system (40), comprising an emergency power supply (42), an emergency brake switch (44) for connecting and disconnecting the power of the emergency power supply (42) to the brake (18), and an emergency drive switch (46) for connecting and disconnecting the power of the emergency power supply (42) to the drive motor (10), characterised in that the elevator rescue system (40) further comprises the motor drive unit (26) and a power line (74) connecting the emergency power supply (42) with the motor drive unit (26) and including the emergency drive switch (46).
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Citations
12 Claims
- 1. Elevator (2) comprising a car (4), a counterweight (6), a hoisting rope (8) for suspending the car (4) and the counterweight (6), a drive motor (10), a motor drive unit (26) for supplying the power to the drive motor (10), and a brake (18) for stopping the movement of the car (4) in an emergency situation, the elevator (2) further comprising an elevator rescue system (40), comprising an emergency power supply (42), an emergency brake switch (44) for connecting and disconnecting the emergency power supply (42) to the brake (18), and an emergency drive switch (46) for connecting and disconnecting the power of the emergency power supply (42) to the drive motor (10) and to the brake (18) wherein the elevator rescue system (40) further comprises the motor drive unit (26) and a power line (74) connecting the emergency power supply (42) with the motor drive unit (26) and including the emergency drive switch (46) and wherein the brake (18) and the motor drive unit (26) are coupled with each other in a way which allows energizing of the drive motor (10) only if the brake (18) is energized.
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9. Method for performing an elevator rescue operation if a safety brake (18) of the elevator (2) has stopped the movement of an elevator car (4) due to an emergency situation, wherein the elevator (2) comprises the car (4), a counterweight (6), a hoisting rope (8) for suspending the car (4) and the counterweight (6), a drive motor (10), a motor drive unit (26) for supplying the power to the drive motor (10), and the brake (18) for stopping the movement of the car (4) in an emergency situation, the elevator (2) further comprising an elevator rescue system (49) having an emergency power supply (42), the method comprising the following steps:
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(a) switching an emergency brake switch (44) thereby connecting the power of the emergency power supply (42) to the brake (18) and lifting the brake (18), (b) monitoring the speed of the car (4), (c) sensing whether the car (4) reaches a landing (72), and (d) switching the emergency brake switch (44) to disconnect the power to the brake (18), if the car (4) is not moving within a fixed period of time, and (e) if the car (4) does not reach a landing (42) during steps (a) to (d), switching an emergency drive switch (46) thereby connecting the power of the emergency power supply (42) to the motor drive unit (26), (f) supplying power from the motor drive unit (26) to the brake (18) and lifting the brake (18), (g) supplying power from the motor drive unit (26) to the motor (10) and moving the car (4), (h) sensing whether the car (4) has reached a landing (72), and (i) stopping the car (4) when it has reached a landing (72). - View Dependent Claims (11, 12)
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10. Method for performing an elevator rescue operation if a safety brake (18) of the elevator (2) has stopped the movement of an elevator car (4) due to an emergency situation, wherein the elevator (2) comprises the car (4), a counterweight (6), a hoisting rope (8) for suspending the car (4) and the counterweight (6), a drive motor (10), a motor drive unit (26) for supplying the power to the drive motor (10), and the brake (18) for stopping the movement of the car (4) in an emergency situation, the elevator (2) further comprising an elevator rescue system (49) having an emergency power supply (42), the method comprising the following steps:
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(A) switching an emergency drive switch (46) thereby connecting the power of the emergency power supply (42) to the motor drive unit (26), (B) determining by means of the motor drive unit (26) based on stored data whether the car (4) and the counterweight (6) are in a balanced load situation or not. (C) if car (4) and counterweight (6) are not in a balanced load situation, (C1) supplying power from the motor drive unit (26) to the brake (18), lifting the brake (18) and allowing the car (4) to move due to gravity, (C2) monitoring and controlling the speed of the car (4), or (D) if car (4) and counterweight (6) are in a balanced load situation, (D1) supplying power from the motor drive unit (26) to the motor (10) and moving the car (4), and (E) sensing whether the car (4) has reached a landing (72), and (F) stopping the car (4) when it has reached a landing (72).
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Specification