CN214780026U - Traction elevator system - Google Patents

Abstract

The utility model provides a tow elevator system, when the accident has a power failure, its group control system drives one of them elevator with only stand-by power supply, and the synchronous machine of the empty load elevator that rises works with generator mode to for other elevator confession electricity, in order to rescue other elevators. The traction elevator system includes: a standby power supply; the power management system is electrically connected with the standby power supply and the driving system of each elevator; the group control system is in communication connection with the control system of each elevator; the communication control system is in communication connection with the standby power supply, the group control system and the power supply management system and controls the standby power supply, the group control system and the power supply management system; the communication control system is configured to, during an empty-load ascent phase of one of the elevators, put the motor of the elevator in generator mode by the group control system, and to control the power management system such that the power management system supplies power to the drive control system of another of the elevators with power from said motor in generator mode.

Description

Traction elevator system

Technical Field

The utility model relates to a tow elevator system.

Background

The mainstream elevator product at present is a traction elevator, three parts of an elevator car, a motor and a counterweight are connected through a steel wire rope, and the weight of the counterweight is designed to be 40-50% larger than that of the car. Compared with a motor-car direct driving mode, the traction driving mode reduces the power consumption of the required motor and achieves the aim of energy conservation.

The motor currently used for the traction elevator is a permanent magnet synchronous motor, and the characteristic of the motor belongs to a generator. When the elevator car is in no-load, the counterweight side is 40% -50% of rated load than the car side, the counterweight will go down in the upward stage of the car, and the gravitational potential energy can be converted into electric energy, so that the motor of the elevator can work in a generator mode.

When the elevator runs normally, the elevator does not move upwards in a load mode, and the generated energy of the motor in the generator mode is fed back to the power grid through resistance heating consumption or through rectification inversion of a driving system (energy feedback function). When power is accidentally cut off, the motor runs in the power generation direction (the weight of the car side is smaller than that of the counterweight side, the car side is upward, and the car side is reverse to the counterweight side, the motor runs downwards) through brake release and sliding rescue or the UPS driving motor, and the power generation amount of the motor is automatically consumed in the driving system due to very low speed and short time.

In addition, in the prior art, each elevator is provided with a UPS (as shown in fig. 1) to drive the motion of the elevator when the elevator is rescued in case of power failure. In the rescue stage, the power generation characteristic of an elevator motor can not be utilized completely, the UPS is short in service life and not environment-friendly, and the later maintenance cost is high.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention provides a traction elevator system, in case of unexpected power failure, the group control system of which drives one of the elevators with a unique standby power supply to rescue the trapped passengers, and then the synchronous motor of the ascending empty elevator operates in a generator mode to supply power to other elevators to rescue the other elevators.

The utility model provides a traction elevator system, include: a plurality of elevators each having a respective control system, drive system and motor, wherein the control system of each elevator is communicatively coupled to and controls the drive system to drive the motor of each elevator via the drive system of each elevator; a standby power supply; the power management system is electrically connected with the standby power supply and the driving system of each elevator; the group control system is in communication connection with the control system of each elevator; the communication control system is in communication connection with the standby power supply, the group control system and the power supply management system and controls the standby power supply, the group control system and the power supply management system; wherein the communication control system is configured to enable the motor of one of the elevators to be in generator mode by the group control system during an empty-load ascent phase of the elevator, and the communication control system controls the power management system such that the power management system supplies power to the drive control system of another of the elevators with power from said motor in generator mode.

Further, the communication control system acquires the state of each elevator through the group control system, and accordingly identifies the one of the elevators as a rescue elevator and the other of the elevators as a rescued elevator, and controls the rescue elevator through the group control system to ascend the rescue elevator, and the motor of the rescue elevator is in a generator mode during an empty-load ascending phase of the rescue elevator, and the communication control system controls the power management system so that the power management system can receive power from the motor in the generator mode and supply the power to the drive control system of the rescued elevator.

Further, the communication control system is configured to: and controlling a power management system to enable a standby power supply to supply power to the motor of the rescue elevator only when the rescue elevator ascends and the motor of the rescue elevator needs to be started or maintained to run.

Further, the communication control system is configured to be able to obtain the location of each elevator by means of the group control system.

Further, the communication control system is configured to identify the elevator with the lowest position as the rescue elevator.

Furthermore, each elevator also comprises a biological recognition system connected with the communication control system, and the communication control system judges whether the elevator is unloaded according to the recognition result of the biological recognition system.

Further, the communication control system is configured to identify an empty elevator as the rescue elevator.

Further, the communication control system is configured to identify the elevator that is lowest in position and empty as the rescue elevator.

Further, the communication control system is configured to identify the elevator with the lowest position and/or no load among the other elevators as a new rescue elevator after the rescue elevator has risen to a threshold position.

Further, the communication control system is configured to identify as a rescued elevator an elevator of the plurality of elevators other than the rescued elevator that is lowest in position and not empty.

Further, the communication control system is configured to control the rising speed of the rescue elevator by the group control system according to the position, load and/or position to be reached of the rescued elevator obtained from the group control system.

Further, the control system of the rescue elevator is configured to detect and control the speed and position of the rescue elevator and feed back to the communication control system when the motor of the rescue elevator is in the generator mode.

Further, the power management system comprises a switching circuit, so that the standby power supply can supply power for the rescue elevator or the rescue elevator can supply power for the rescued elevator according to the control signal of the communication control system.

Further, the power management system monitors the power supply voltage state of the standby power supply or the power supply voltage state of the motor of the rescue elevator in the generator mode in real time and feeds the power supply voltage state back to the communication control system.

Drawings

Fig. 1 is a prior art traction elevator system;

fig. 2 is a block diagram of a traction elevator system according to a preferred embodiment of the present invention;

fig. 3 is a schematic diagram of a rescue elevator supplying power to a rescued elevator in a traction elevator system according to a preferred embodiment of the present invention;

fig. 4 is a schematic diagram of supplying power to an elevator using a backup power source in a traction elevator system according to a preferred embodiment of the present invention;

fig. 5 is a schematic view of a rescue method implemented by a traction elevator system according to a preferred embodiment of the present invention.

Detailed Description

Referring to fig. 2, according to a preferred embodiment, the traction elevator system 1 of the present invention comprises a plurality of elevators, such as a-D shown in the figure (it should be understood that the number of elevators may be two, three, or other numbers depending on the needs), each elevator a-D having its own control system, drive system, and motor, wherein the control system of each elevator is in communication with and controls the drive system to drive the motor of each elevator by the drive system of each elevator a-D, i.e. to control the lifting of the elevator in accordance with the control signals of the control system. The drive system of each elevator may also include the necessary rectifiers and inverters to receive power from the mains or backup power supply and provide it to its motor.

The traction elevator system 1 further includes a backup power supply 2, a group control system 3, a power supply management system 4, a communication control system 5, and the like.

The backup power supply 2 may be, for example, an Uninterruptible Power Supply (UPS) or any other suitable form of backup power supply to supply power to the elevator via the power management system 4 under the control of the communication control system 5 as required in the event of an unexpected power outage. In general, when a power failure occurs unexpectedly and rescue is required, an elevator is in a stationary state, and at this time, a large starting current is required to restart the elevator in the stationary state, so that a backup power supply is required to start the elevator. After the elevator is started to rise, the elevator is allowed to be near the leveling floor, thereby releasing passengers. As will be understood by those skilled in the art, by "near landing" is meant that the elevator is raised to the nearest floor to free passengers, thereby minimizing power consumption.

According to the preferred embodiment of the present invention, only one backup power source 2 is provided, and in case of unexpected power failure, one of the elevators can be powered under the control of the communication control system 5, so that it starts and rises and levels nearby. Preferably, the specification of the backup power source 2 (e.g. a UPS power source) may be selected as follows: the battery capacity of the standby power supply is 2 times of the electric quantity required by single rescue of the elevator requiring the maximum power in a plurality of elevators or the elevator with the farthest rescue journey under the worst condition. The backup power source 2 may also comprise a corresponding rectifying and inverting system.

The group control system 3 is electrically connected to the respective control system of each elevator a-D so that it can be sent elevator control signals to control the operation of the elevators. It will be understood by those skilled in the art that a group control system for elevators is a control system that uses group control technology for unified scheduling and management of multiple elevators. In addition to performing the task of uniformly allocating multiple elevators, the group control system can monitor and obtain the status of each elevator, such as but not limited to various information such as elevator position, speed, load, location to be reached, and/or whether there is a fault.

The power management system 4 is electrically connected to the backup power supply 2 and the drive system of each elevator a-D. Preferably, the power management system 4 also enables the mains electricity to be electrically connected to the drive system of each elevator a-D. Therefore, the power management system 4 can select commercial power or a standby power supply to supply power for the elevator or select a rescue elevator to supply power for the elevator to be rescued according to the control signal of the communication control system 5. It will of course be understood that the connection of the mains to each elevator can also be controlled by another system.

The communication control system 5 is communicatively connected to and controls the backup power supply 2, the group control system 3, and the power management system 4. The communication control system 5 is arranged to enable the motor of one of the elevators a-D, e.g. elevator a described later, to be in generator mode by the group control system 3 during the idle-load-up phase of this elevator, and the communication control system 5 controls the power management system 4 such that the power management system 4 powers the drive control system of another of the elevators with power from said motor in generator mode, thereby starting or maintaining the operation of this other elevator.

Therefore, the power management system 4 preferably comprises a switching circuit (not shown) to let the backup power supply power the rescue elevator, or let the rescue elevator power the rescued elevator, or power all elevators with mains supply, depending on the control signal of the communication control system 5. Preferably, the switching circuit mainly includes any suitable electrical element such as a control signal receiver, a contactor, etc., as long as it can perform the above switching. Preferably, the power management system 4 may also include any other necessary electronic circuits and devices, etc. For example, the power management system 4 may monitor the power supply voltage state of the backup power supply 2 or the power supply voltage state of the generator-mode motor of the rescue elevator in real time, and feed back the power supply voltage state to the communication control system 5, so as to perform power supply management, for example, after the rescue is completed, the power supply of the backup power supply or the power supply from the rescue elevator is cut off, and the power supply is automatically switched to the commercial power supply after the commercial power is available. Preferably, the power management system 4 can also be integrated with an existing backup power source (e.g., UPS) into a single system.

Further, the communication control system 5 preferably includes, but is not limited to, a signal input device, a signal output device, a signal processing device (e.g., cpu, logic circuit, single chip, etc.), and the like, so that it can perform processing of signals from the group control system 3, the power management system 4, and the like, perform analysis and judgment (as described below), and transmit control signals to the backup power supply 2, the group control system 3, the good power management system 4, and the like. Thus, although a specific configuration and composition of the communication control system 5 is not given herein, those skilled in the art may implement the communication control system in accordance with the teachings of the present invention without departing from the scope of the present invention.

Preferably, the communication control system 5 can acquire the status of each elevator through the group control system 3, for example when an unexpected power outage requires rescue, and on the basis thereof identify one of the elevators a-D as a rescue elevator and the other elevator of the elevators as a rescued elevator. The "rescue elevator" here means that the motor of the elevator is in generator mode and its power generation is used to power the rescued elevator. It will be understood that when the motor is in generator mode, the rescue elevator will rise due to the weight of the elevator counterweight and its motor will rotate and generate electric energy. In addition, the motor (and the elevator) can be subjected to speed reduction control, and further, regenerative braking energy can be generated. Thereby, the gravitational potential energy of the counterweight is converted into the upward kinetic energy of the elevator and the electric energy of the generator.

The communication control system 5 can also control the rescue elevator through the group control system 3 to make the rescue elevator ascend. During the no-load ascent phase of the rescue elevator, the motor of the rescue elevator is in generator mode, and the communication control system 5 controls the power management system 4 so that the power management system 4 can receive power from the motor in generator mode and supply the power to the drive control system of the rescued elevator.

As shown in fig. 3, for example, when elevator a is recognized as a rescue elevator, the motor of elevator a is in generator mode, and its power generation is fed to the power management system 4, and the power management system 4 has a drive control system that feeds the power to the rescued elevator B to operate elevator B. The arrows in the figure show the direction of supply current flow. For the sake of simplicity, only the case of elevator a as a rescue elevator and supplying elevator B with power is depicted, but it should be understood that each elevator B-D, after being identified as a rescue elevator, can supply power to other rescued elevators in the manner shown in fig. 3 and described for elevator a.

Preferably, the communication control system 5 is able to control the power management system 4 so that the backup power supply 2 supplies power to the motor of the rescue elevator only when the rescue elevator is rising and it is necessary to start or maintain its motor running. When the rescue elevator continuously rises under the action of the counterweight, the power supply management system 4 cuts off the power supply of the standby power supply 2 to the rescue elevator. This minimizes the use of the backup power supply 2, reduces its losses and extends the life of the backup power supply.

Preferably the communication control system 5 is also arranged to be able to obtain the position of each elevator a-D via the group control system 3, e.g. for determining which elevator is in the lowest position, which can be used as a rescue elevator.

Preferably, each elevator a-D may also include a biometric identification system (not shown) in communicative connection with the communication control system 5. The biometric identification system can be, for example, an infrared identification system or other suitable identification means or system, which can identify whether a passenger or other living being is present in the elevator, so that the communication control system 5 can determine whether the elevator is empty on the basis of the identification result of the biometric identification system. It is understood that the determination that the elevator is empty can also be implemented in any other way, e.g. by sensing the weight of the elevator to obtain an empty determination, or by a staff observing the situation in the elevator via a camera in the elevator and manually inputting the empty determination to the communication control system.

Preferably, the communication control system 5 can use the empty load judgment result alone or can combine the detection result of the elevator position with the empty load judgment result as described above to identify an elevator suitable as a rescue elevator among a plurality of elevators to rescue and/or supply power to the rescued elevator.

For example, in the event of an unexpected power outage, for one or more elevators judged to be empty, rescue may not be performed, but one of the empty elevators may be used as a rescue elevator (preferably an empty and lowest elevator) to power the rescued elevator (as described below).

Or, the elevator which is judged not to be empty (namely, has passengers) and has the lowest position is identified as a rescue elevator, the power management system 4 is instructed by the communication control system 5 to supply power to the rescue elevator by using the standby power supply 2 so as to enable the rescue elevator to ascend and be leveled nearby, so that the passengers in the elevator are preferentially arranged to be rescued, and after the passengers are released and the elevator is empty, the motor of the elevator is operated in a generator mode to supply power to the rescued elevator.

Alternatively, the communication control system 5 can directly identify the elevator with the lowest position as a rescue elevator, whether it is empty or not. Specifically, if one of the elevators is lowest and is not empty (i.e., a passenger to be rescued), it is powered by the backup power supply 2 to rise and level nearby to release the passenger. Subsequently, the elevator becomes empty (if the elevator rises and levels nearby to release passengers, the elevator may still be the elevator with the lowest position), and the communication control system 5 controls the elevator again to supply power to the rescued elevator through the power management system 4; alternatively, if one of the elevators is lowest and empty, the communication control system 5 may identify it directly as a rescue elevator to power the rescued elevator as described above.

Preferably, after the communication control system 5 identifies the rescue elevator, according to the position and the no-load judgment result of each elevator, the communication control system 5 may identify an elevator which is the lowest in position and does not have a no-load among the plurality of elevators except the rescue elevator as a rescued elevator, and then a motor of the rescue elevator generates electricity and supplies electricity to the rescued elevator. Therefore, the elevator with the lowest position and no empty load in all elevators waiting for rescue can be rescued preferentially to release passengers quickly. The elevator converted into empty can then also be used as a rescue elevator to power the rescued elevator, i.e. the communication control system 5 can update the rescue elevator used to power the rescued elevator in real time according to the position of the elevator and the empty situation.

Preferably, the control system of the rescue elevator is configured to detect and control the speed and position of the rescue elevator and feed back to the communication control system 5 when the motor of the rescue elevator is in the generator mode, so as to adjust the power supply condition of the rescue elevator according to the actual conditions, such as adjusting the speed, output power and the like of the rescue elevator.

Preferably, the communication control system 5 is configured to identify the elevator with the lowest position and/or empty among the other elevators as a new rescue elevator after said rescue elevator has risen to a threshold position. The threshold position here may be the highest position to which the rescue elevator can rise, for example the top position of the building. Alternatively, the threshold position may be a position: according to the judgment of the communication control system 5, after the rescue elevator ascends to the position, the further ascending distance is limited, and the power is not supplied to the rescued elevator. The threshold position can thus also be understood as a position at which the rescue elevator is no longer suitable for supplying the rescued elevator with power. The rescue elevator reaching the threshold position can be directly deactivated. The communication control system 5 can determine a new rescue elevator and then, as described above, activate the new rescue elevator via the backup power supply to cause it to rise, thereby powering the other elevators to be rescued with the new rescue elevator.

Next, a rescue method implemented by the traction elevator system according to the present invention in the case of some unexpected power outage will be described with reference to fig. 5.

As shown, based on the location detection and detection by the biometric identification system, it is determined that there are passengers in each of elevators a-D, with elevator a being the lowest location relative to the other elevators B-C (stage 1). Elevator a is recognized by the communication control system 5 as a rescue elevator and is preferably arranged to release its passengers, i.e. to supply the drive system of elevator a with power via the backup power supply, so that it rises and levels nearby (as indicated by the arrow in phase 2), so that the passengers are released (phase 2).

Subsequently, the communication control system 5 controls the operation of the elevator a via the group control system 3 so that the elevator a performs a lifting movement under the influence of the counterweight, with its motor in generator mode, at which time the communication control system 5 cuts off the power supply of the elevator a from the backup power supply 2 via the power management system 4. The motor of elevator a in generator mode generates electric energy and supplies the elevator C, which is the lowest situated and not empty among the elevators B-D, i.e. the motor of elevator a acts as a backup power supply for elevator C, so that elevator C also rises and levels nearby, releasing passengers (phase 3).

After releasing the passenger, the communication control system 5 can also update the identification of the rescue elevator according to the positions of elevators a and C. For example, depending on the position of elevator a, if it is still sufficient to supply power to elevators B and/or D to be rescued, elevator a continues to function as a rescue elevator (stage 4). As another example, if the group control system 3 recognizes that elevator a has reached or is about to approach a threshold position as described above, the group control system 3 recognizes the elevator C, which has been unloaded at this time, as a new rescue elevator for powering elevator B or D.

From the above description, those skilled in the art will understand that the communication control system 5 can identify and update the rescue elevator in real time according to the position and empty judgment results of a plurality of elevators in the traction elevator system, and according to the power demand required for implementing rescue, etc., thereby fully utilizing the generator characteristics of the elevator motor to provide power for the rescue task.

Adopt and according to the utility model discloses a tow elevator system can reduce the quantity of stand-by power supply, needn't set up more batteries for retrieving regeneration braking energy to the equipment and the device quantity that are equipped with in the elevator machine room reduce, and reduce the cost that is used for emergency rescue.

Exemplary embodiments of the proposed solution of the present disclosure have been described in detail above with reference to preferred embodiments, however, it will be understood by those skilled in the art that many variations and modifications may be made to the specific embodiments described above, and that many combinations of the various technical features and structures presented in the present disclosure may be made without departing from the concept of the present disclosure, without departing from the scope of the present disclosure, which is defined by the appended claims.

Claims (14)

1. A traction elevator system, comprising:

a plurality of elevators each having a respective control system, drive system and motor, wherein the control system of each elevator is communicatively coupled to and controls the drive system to drive the motor of each elevator via the drive system of each elevator;

a standby power supply;

the power management system is electrically connected with the standby power supply and the driving system of each elevator;

the group control system is in communication connection with the control system of each elevator;

the communication control system is in communication connection with the standby power supply, the group control system and the power supply management system and controls the standby power supply, the group control system and the power supply management system;

wherein the communication control system is configured to enable the motor of one of the elevators to be in generator mode by the group control system during an empty-load ascent phase of the elevator, and the communication control system controls the power management system such that the power management system supplies power to the drive control system of another of the elevators with power from said motor in generator mode.

2. The traction elevator system as claimed in claim 1, wherein the communication control system acquires the state of each elevator through the group control system and recognizes the one of the plurality of elevators as a rescue elevator and the other one of the plurality of elevators as a rescued elevator according thereto, and

the communication control system controls the rescue elevator through the group control system to enable the rescue elevator to ascend, a motor of the rescue elevator is in a generator mode in an idle-load ascending stage of the rescue elevator, and the communication control system controls the power management system to enable the power management system to receive power from the motor in the generator mode and supply the power to a drive control system of the rescued elevator.

3. The traction elevator system of claim 2, wherein the communication control system is configured to:

and controlling a power management system to enable a standby power supply to supply power to the motor of the rescue elevator only when the rescue elevator ascends and the motor of the rescue elevator needs to be started or maintained to run.

4. The traction elevator system as recited in claim 2, wherein the communication control system is configured to obtain the location of each elevator via the group control system.

5. The traction elevator system as recited in claim 4, wherein the communication control system is configured to identify the elevator with the lowest position as the rescue elevator.

6. The traction elevator system according to claim 4, wherein each elevator further comprises a biometric recognition system connected to the communication control system, and the communication control system judges whether the elevator is empty according to the recognition result of the biometric recognition system.

7. The traction elevator system as recited in claim 6, wherein the communication control system is configured to identify an empty elevator as the rescue elevator.

8. The traction elevator system as recited in claim 6, wherein the communication control system is configured to identify the lowest positioned and empty elevator as the rescue elevator.

9. The traction elevator system as recited in claim 6, wherein the communication control system is configured to identify the lowest and/or empty elevator of the other elevators as a new rescue elevator after the rescue elevator has risen to a threshold position.

10. The traction elevator system as recited in any one of claims 2-9, wherein the communication control system is configured to identify as a rescued elevator the elevator of the plurality of elevators other than the rescued elevator that is lowest in position and not empty.

11. The traction elevator system according to any of claims 2-9, characterized in that the communication control system is configured to control the ascent speed of the rescue elevator by the group control system according to the position of the rescued elevator, the load, and/or the position to be reached, obtained from the group control system.

12. The traction elevator system as recited in claim 2, wherein the rescue elevator control system is configured to detect and control the speed and position of the rescue elevator and feed back to the communication control system when the motor of the rescue elevator is in generator mode.

13. The traction elevator system as claimed in claim 1, wherein the power management system comprises a switching circuit to allow the backup power supply to supply power to the rescue elevator or allow the rescue elevator to supply power to the rescued elevator according to the control signal of the communication control system.

14. The traction elevator system as claimed in claim 3, wherein the power management system monitors the state of the supply voltage of the backup power or the state of the supply voltage of the motor of the rescue elevator in the generator mode in real time and feeds back to the communication control system.

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