JP2018030701A - Elevator system and power supply method during elevator power failure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable appropriate landing operation on the nearest floor during a power failure even though a battery for an elevator power failure deteriorates.SOLUTION: In a system including a plurality of elevator cars and a battery for a power failure in each of the elevator cars, a battery capacity to be required for landing operation on the nearest floor during a power failure of an elevator car is calculated from a car position and load information when the power failure is detected. Then, the battery of each elevator car is switched to a driving power supply of the elevator car with a battery connected thereto, wherein deterioration or charging capacity shortage is detected by a command generated on the basis of the calculated result.SELECTED DRAWING: Figure 7

Description

  The present invention relates to an elevator system and a power supply method during an elevator power failure.

In recent years, elevators have a function to perform landing operation to the nearest floor using the power supply of the battery in the event of a power failure (closest floor landing operation function at the time of power failure) so as not to confine passengers when a power failure occurs doing. In this case, the maintenance staff needs to periodically replace the battery for the nearest floor landing operation function at the time of a power failure. Specifically, maintenance personnel replace batteries regularly (every few years).
The battery replacement period (years) is usually determined by the battery life recommended by the battery manufacturer.

JP 2009-62152 A JP 2013-203513 A

  However, in actual elevator operation, the battery life may be exhausted before replacement. In other words, if the battery is used in a situation where deterioration is severe due to environmental deterioration such as high temperature and humidity, or if the power failure occurs more frequently than usual and the charge and discharge are repeated frequently, the battery life will be exhausted before replacement. End up. In such a case, even if a power outage occurs, it becomes impossible to land on the nearest floor using a battery power source.

In order to solve such a problem, for example, Patent Document 1 proposes a technique for automatically diagnosing battery deterioration in a time zone in which an elevator is not frequently used.
Patent Document 2 proposes a technique for supplying power from a battery of a passenger conveyor having a large amount of stored electricity to an elevator that cannot be operated in a building having an elevator and a passenger conveyor (so-called escalator) during a power failure. Yes.

  However, as described in Patent Document 1, even if the battery deterioration is automatically diagnosed and diagnosed as being deteriorated, a certain amount of days are required until the deteriorated battery is replaced. This is because the battery replacement operation itself must be performed by dispatching workers to the site. Therefore, even if the technique described in Patent Document 1 is applied, there is a possibility that the landing operation function to the nearest floor may be executed in a state where the battery has deteriorated even during a power failure.

  Moreover, the technique described in patent document 2 is applicable only to the building provided with the passenger conveyor other than the elevator. In addition, depending on the situation of the battery on the passenger conveyor side of the supply source, there may be a case where there is not enough remaining charge necessary for landing operation on the nearest floor. Therefore, there is a problem that not only the building to be applied is limited, but even if the application is possible, sufficient power is not always supplied from the battery on the passenger conveyor side.

  An object of the present invention is to provide an elevator system and a power supply method for an elevator power failure that can appropriately perform the landing operation function up to the nearest floor during a power failure.

In order to solve the above problems, for example, the configuration described in the claims is adopted.
The present application includes a plurality of means for solving the above problems. To give an example, an elevator in which a plurality of elevator cars are arranged and a battery for supplying power during a power failure is prepared for each elevator car. Applies to the system. A power failure detection unit, a battery diagnosis unit, a control unit, and a power switching unit are provided.
The control unit detects the position of the elevator car and load information.
The power supply switching unit is based on the result of calculating the battery capacity required for the nearest floor landing operation at the time of power failure of the elevator car from the car position and load information detected by the control unit when the power failure detection unit detects a power failure. In accordance with the generated command, the battery for each elevator car is switched to the power source for driving the elevator car to which the battery whose diagnosis unit detects deterioration or insufficient charge capacity is connected.

According to the present invention, when one of the batteries is deteriorated or the charging capacity is insufficient, a battery having a surplus capacity is automatically selected from the batteries arranged for other elevator cars and the power source is switched. Thus, it will be possible to operate the nearest floor landing during an appropriate power outage.
Therefore, according to the present invention, even when a deteriorated battery is present, all elevator cars can be landed on the nearest floor at the time of a power failure.
Problems, configurations, and effects other than those described above will be clarified by the following description of embodiments.

It is a lineblock diagram showing the example of the elevator system by the example of one embodiment of the present invention. It is a block diagram which shows the structural example of the control apparatus by one embodiment of this invention, and a battery switching device. It is a block diagram which shows the hardware structural example of each apparatus of one embodiment of this invention. It is a block diagram which shows the example of a connection of the switching part by one embodiment of this invention. It is a flowchart which shows the example of operation control of each elevator car in the control apparatus by one embodiment of this invention. It is a flowchart which shows the example of a diagnostic process of the battery by one embodiment of this invention. It is a flowchart which shows the battery switching process example at the time of the power failure by one embodiment of this invention.

  Hereinafter, an embodiment of the present invention (hereinafter referred to as “this example”) will be described with reference to the accompanying drawings.

[1. Overall elevator system configuration]
FIG. 1 is a diagram showing an example of the overall configuration of the elevator system of this example.
In the example of FIG. 1, three elevator cars 104 a, 104 b, and 104 c are installed in a building 101. The three elevator cars 104a, 104b, and 104c are referred to as No. 1, No. 2, No. 3, and No. 3, respectively. Each elevator car 104a, 104b, 104c moves up and down by driving of the electric motors 103a, 103b, 103c. The electric motors 103a, 103b, and 103c are controlled by the control units 102a, 102b, and 102c prepared for the three elevator cars 104a, 104b, and 104c, respectively.

For example, a counterweight 106a is connected to the elevator car 104a of No. 1 machine via a wire rope, and the elevator car 104a moves up and down by driving an electric motor 103a arranged in the path of the wire rope. A pulley 105a is disposed in the path of the wire rope. In addition, an encoder 112a is provided, and the encoder 112a detects the rotational drive amount of the electric motor 103a, and detects the lift position of the elevator car 104a. Further, a load sensor 107a is attached to the elevator car 104a, and the load on the elevator car 104a is detected. As the load sensor 107a, for example, a non-contact sensor that detects a sinking amount when a passenger enters the car is used.
The lift position detected by the encoder 112a and the load detected by the load sensor 107a are supplied to the control unit 102a.

  The other elevator cars 104b and 104c also move up and down by driving the electric motors 103b and 103c under the control of the control units 102b and 102c. The encoders 112b and 112c detect the lift positions of the elevator cars 104b and 104, and the load sensors 107b and 107c detect the loads. The pulleys 105b and 105c and the counterweights 106b and 106c have the same configuration as that of the first unit.

A commercial power supply 108 is supplied to the motors 103a, 103b, 103c and the control units 102a, 102b, 102c of each of the first to third units. The motors 103a, 103b, and 103c are supplied with a relatively high-voltage power source such as a three-phase AC 200V. The control units 102a, 102b, and 102c are supplied with AC power or DC power converted from AC.
Here, the power failure detection units 110a, 110b, and 110c are connected to the control units 102a, 102b, and 102c of each of the first to third units. When the supply of the commercial power supply 108 is stopped (at the time of power failure), the power failure is detected by each power failure detection unit 110a, 110b, 110c. In addition, although it was set as the structure provided with the power failure detection part 110a, 110b, 110c for every unit in the example of FIG. 1, it is good also as a structure provided with one power failure detection part common to each unit. Further, when the power failure detection units 110a, 110b, and 110c detect a power failure, the power switching unit 111 described later is notified of the power failure.

Furthermore, the system of this example includes batteries 109a, 109b, and 109c used at the time of a power failure for each unit. At the time of a power failure, DC power charged in the batteries 109a, 109b, and 109c is converted into AC power by an inverter (not shown) and then supplied to the motors 103a, 103b, and 103c. As the batteries 109a, 109b, and 109c, for example, secondary batteries such as lead storage batteries are used. As the secondary battery, a battery having a voltage and a capacity necessary for performing a landing operation up to the nearest floor at the time of a power failure is used, and details thereof will be described later.
The control units 102a, 102b, and 102c are also supplied with power from the batteries 109a, 109b, and 109c during a power failure. However, the control units 102a, 102b, and 102c may be configured such that power is supplied from a control system battery (not shown) different from the batteries 109a, 109b, and 109c in the event of a power failure.

Furthermore, the elevator system of this example includes a power supply switching unit 111. That is, the elevator system of this example is based on the fact that the electric motors 103a, 103b, 103c of each unit are operated by the power from the corresponding batteries 109a, 109b, 109c at the time of a power failure.
However, depending on the usage status of each battery 109a, 109b, 109c, there is a possibility that landing operation to the nearest floor may not be possible at the time of a power failure. In such a case, the power supply switching unit 111 switches the power supply path from each battery 109a, 109b, 109c.

The power supply switching unit 111 is also operated by a power source from any of the batteries 109a, 109b, and 109c in the same manner as the control units 102a, 102b, and 102c at the time of a power failure. Alternatively, the power source switching unit 111 may be operated at the time of a power failure by a power source from a battery for a control system different from the batteries 109a, 109b, and 109c.
Note that the batteries 109a, 109b, 109c of each unit are always charged by a DC power source converted from the commercial power source 8 during normal operation and are in a fully charged state.

[2. Configuration of control unit and power supply switching unit]
FIG. 2 is a block diagram illustrating a configuration example of the control units 102a and 102b and the power supply switching unit 111 corresponding to the first and second units. 2 shows the configuration of the control units 102a and 102b of the first unit and the second unit, the control unit 102c of the third unit has the same configuration, and a description of the third unit will be omitted.

  The control units 102a and 102b include elevator car control units 201a and 201b, and drive the elevator cars 104a and 104b by the electric motors 103a and 103b (FIG. 1) based on operations such as buttons in the cars and call buttons on the landings. Control. Further, the elevator car control units 201a and 201b acquire the elevator position information detected by the encoders 112a and 112b and the load information detected by the load sensors 107b and 107c. And the acquired raising / lowering position information and load information are transmitted to the power supply switching part 111 side from the communication parts 202a and 202b.

  In addition, the control units 102a and 102b include battery diagnosis units 203a and 203b, and diagnose the battery state from the voltage of the batteries 109a and 109b of each unit. Diagnosis by the battery diagnosis units 203a and 203b is periodically performed, for example, once a month in accordance with commands from the elevator car control units 201a and 201b. A specific example of the diagnosis of the battery state will be described later.

  The power switching unit 111 includes a communication unit 204 connected to the control units 102a and 102b, a recording unit 205 that records the operation status of the elevator car received by the communication unit 204, and causes the car to travel to the nearest floor during a power failure. And a capacity calculation unit 206 for calculating a power capacity necessary for the above. The recording unit 205 records the diagnosis results of the batteries 109a and 109b of each car, in addition to the operation status of the elevator car of each car. The capacity calculation unit 206 calculates the power capacity from the latest car position and load of each car recorded in the recording unit 205.

  Furthermore, the power supply switching unit 111 includes a supply determination unit 207 that determines the connection destination of the battery, and a switching unit 208 that switches the connection destination of the battery according to a command from the supply determination unit 207. The supply determination unit 207 issues a command to switch the battery supply path to the switching unit 208 based on the information obtained by the calculation in the capacity calculation unit 206 and the diagnosis results of the batteries 109a and 109b of each unit. Do.

[3. Example of hardware configuration of control unit and power supply switching unit]
FIG. 3 shows an example of the hardware configuration of a computer device that constitutes the control units 102a, 102b, and 102c and the power supply switching unit 111. The control units 102a, 102b, and 102c and the power supply switching unit 111 are configured by a computer device C, for example.
That is, the computer device C includes a CPU (Central Processing Unit) C1, a ROM (Read Only Memory) C2, a RAM (Random Access Memory) C3, a display unit C5, an operation unit C6, a nonvolatile storage C7, and an interface. Part C8 is provided. These units C1, C2, C3, C5, C6, C7, and C8 are connected to each other by a bus line C4 so that data can be transferred.

  The CPU C1 reads out the program code of software that realizes the functions of the respective units constituting the control units 102a, 102b, and 102c or the power supply switching unit 111 from the ROM C2 and executes it. In the RAM C3, variables, parameters and the like generated during the arithmetic processing are temporarily written.

  As the non-volatile storage C7, for example, a hard disk drive (HDD), a solid state drive (SSD), and other various storage media are used. In addition to the OS (Operating System) and various parameters, a program for causing the computer apparatus C to function as the control units 102a, 102b, and 102c and the power supply switching unit 111 is recorded in the nonvolatile storage C7.

  The interface unit C8 transmits and receives various data to and from other devices (processing units) via a LAN (Local Area Network), a dedicated line, and the like. The computer device C includes the display unit C5 and the operation unit C6 as an example, and the display unit C5 and the operation unit C6 may be omitted if necessary.

[4. Configuration example of switching unit]
FIG. 4 shows an example of a switching configuration of a power supply path from the batteries 109a, 109b, and 109c by the switching unit 208.
The power from the batteries 109a, 109b, 109c of each unit is supplied to the control units 102a, 102b, 102c of each unit. The power from the batteries 109a, 109b, 109c of each unit is also supplied to the motors 103a, 103b, 103c of each unit. However, AC power converted by an inverter (not shown) is supplied to the motors 103a, 103b, and 103c.

  As shown in FIG. 4, the negative side of each battery 109a, 109b, 109c is connected in common, and the open / close switches 208a, 208b, 208b in the switching unit 208 are connected to the positive side of each battery 109a, 109b, 109c. One end of 208c is connected. The other ends of the open / close switches 208a, 208b, 208c are connected in common. These open / close switches 208a, 208b, 208c are opened / closed by a command from the supply determination unit 207 (FIG. 2).

With this configuration, for example, when the on / off switches 208a and 208b are turned on, power is supplied from the battery 109a of the first unit to the control unit 102b and the motor 103b of the second unit. In addition, power is supplied from the second battery 109b to the first controller 102a and the motor 103a.
In this way, power is supplied from the batteries 109a, 109b, 109c of each unit to the control units and motors of other units by a combination of turning on / off the three open / close switches 208a, 208b, 208c. Each open / close switch 208a, 208b, 208c is turned on only when the power is switched, and is kept off when the power is not switched.

[5. Processing at the control unit of each unit]
FIG. 5 is a flowchart showing an example of elevator control processing in the control units 102a, 102b, and 102c of each unit. Here, the control unit 102a of the first unit will be described as an example, but the same control processing is performed for the control units 102b and 102c of the other units.

  First, when the elevator is turned on, the control unit 102a executes an initial process (step S301), and after the initial process is completed, shifts to a normal operation process (step S302). During the normal operation process, the control unit 102a periodically performs a diagnosis process for the battery 109a (step S303). The battery diagnosis process is performed at a preset cycle such as once a month. The battery 109a diagnosis process is a process for diagnosing the presence or absence of deterioration of the battery 109a, and details thereof will be described later.

  After completing the diagnosis process of the battery 109a, the process returns to the normal operation process. Here, the control unit 102a transmits the operation status data of the elevator car to the power supply switching unit 111 (step S304). This operation status data includes at least the current elevator car position and current load information. And the control part 102a judges whether the power failure detection part 110a detected the power failure during normal driving | operation (step S305). Here, when a power failure is not detected (NO in step S305), the control unit 102a continues the normal operation process in step S302.

When a power failure is detected in step S305 (YES in step S305), the control unit 102a determines whether or not there is permission to switch to the battery of the own machine (step S306). The permission to switch to the battery of the own machine is set in the battery diagnosis process in step S303.
If there is permission to switch to the battery of the own machine (YES in step S306), the control unit 102a switches to the power source from the battery 109a of the own machine as a power source for driving the electric motor 103a (step S307). Then, in a state where the power from the battery 109a of the own machine is supplied, the control unit 102a performs the landing operation of the elevator car 104a to the nearest floor by the electric motor 103a (step S308).

  There are two possible ways of landing to the nearest floor: landing on the uppermost floor and landing on the lower nearest floor. Whether to land on the upper nearest floor or the lower nearest floor is based on the position of the elevator car 104a detected by the encoder 112a and the load detected by the load sensor 107a. It is determined. However, in any case, at the time of landing operation to the nearest floor, the operation is performed at a lower speed than the normal time to suppress the power consumption. When the elevator car 104a arrives at the nearest floor, the control unit 102a stops the operation.

  In step S306, when switching to the battery of the own machine is prohibited (NO in step S306), the control unit 102a determines whether power is supplied from the battery 109b or 109c of the other machine. (Step S309). Here, when power is supplied from the battery 109b or 109c of the other machine (YES in step S309), the process proceeds to step S308, and the control unit 102a uses the supplied power to move the elevator car 104a to the maximum with the electric motor 103a. Control to perform landing operation up to the floor.

  When there is no power supply from the battery 109b or 109c of the other car (NO in step S309), the apparatus stands by without performing the landing operation up to the nearest floor. That is, even if the landing operation up to the nearest floor is executed in a state where the battery is deteriorated, a sufficient capacity of power is not supplied, so that there is a possibility of stopping again during traveling. Therefore, in order to avoid giving anxiety to the passengers, the landing operation up to the nearest floor is not performed. In addition, when not performing the landing operation to this nearest floor, the control part 102a confirms that the landing operation to the nearest floor is not performed with respect to the monitoring center (not shown) of an elevator. You may make it notify automatically.

[6. Battery diagnostic process]
FIG. 6 is a flowchart showing an example of diagnosis processing of the battery 109a performed by the control unit 102a. This diagnosis process is executed in step S303 of the flowchart of FIG.
First, the control unit 102a determines whether or not the current date and time is a date and time for diagnosing the battery (step S401). Here, for example, a diagnosis date and time once a month is set in advance, and it is determined whether or not the diagnosis date and time has been reached.

  If the current date and time do not coincide with the diagnosis date and time in step S401 (NO in step S401), the diagnosis process is terminated and normal operation is continued. If the current date / time matches the diagnosis date / time (YES in step S401), the control unit 102a checks whether the charging of the battery 109a is completed (step S402). The battery diagnosis unit 203a determines whether or not the charging of the battery 109a is completed. Here, the state of charge may be accurately measured from the battery voltage or the like. For example, when the battery 109a is mounted (replaced) and the time from the start of charging (empty state) to full charge has elapsed, It may be determined that charging is complete.

  If it is determined in step S402 that charging has not been completed (NO in step S402), an accurate diagnosis result cannot be obtained, and the control unit 102a ends the diagnosis process and returns to the normal operation process. However, in this case, the diagnostic process may be started again after the time assumed to be fully charged has elapsed.

  If it is determined in step S402 that charging has been completed (YES in step S402), the control unit 102a performs a diagnosis process for the battery 109a (step S403). Here, for example, when the voltage of the battery 109a is measured and exceeds a preset threshold value, the control unit 102a determines that the diagnosis result is OK, that is, there is no deterioration. The threshold value here is set to the minimum value required for the elevator car 104a to perform landing operation up to the nearest floor with the electric motor 103a. Further, instead of measuring the voltage, the battery 109a may be discharged to determine that the diagnosis result is OK when a predetermined discharge capacity is satisfied.

Next, the control unit 102a determines whether or not the diagnosis result is OK in step S403 (step S404). Here, when the battery 109a is not deteriorated and the diagnosis result is OK (YES in step S404), the switching of the own machine to the battery 109a is permitted at the time of a power failure, and the control unit 102a registers permission information (step S405). ).
If the battery 109a is deteriorated and the diagnosis result is not OK (NO in step S404), the switching of the own machine to the battery 109a is prohibited at the time of a power failure, and the control unit 102a registers prohibition information (diagnosis result NG). (Step S406). Information of these diagnosis results is held by the control unit 102 and also transmitted to the power supply switching unit 111 and stored in the recording unit 205 of the power supply switching unit 111.

[7. Battery supply switching process at power failure]
FIG. 7 is a flowchart illustrating an example of battery supply switching processing executed by the control of the power supply switching unit 111 during a power failure.
First, the power supply switching unit 111 acquires the operation status data including the car position and load of each car transmitted in step S304 (FIG. 5), and obtains the diagnosis results of the batteries 109a to 109c of each car ( Step S501).

  The operation status data of each unit is recorded in the recording unit 205 and updated to the latest data every time it is transmitted from each of the control units 102a to 102c (step S502). Then, the power supply switching unit 111 performs power failure detection processing of the power source, and determines whether or not a power failure has been detected by the power failure detection units 110a to 110c (step S503). Here, when the occurrence of a power failure is not detected (NO in step S503), the power supply switching unit 111 returns to the operation status data acquisition process in step S501. Therefore, the operation status data recorded in the recording unit 205 is updated to the latest data until immediately before a power failure occurs.

  If a power outage is detected in step S503 (YES in step S503), the power supply switching unit 111 determines whether there is a machine with the diagnosis result NG based on the diagnosis result recorded in the recording unit 205. (Step S504). Here, when there is no diagnosis result NG in all the units (that is, the diagnosis result is OK) (NO in step S504), there is no problem even if switching to the battery of the own unit, the power switching unit 111 switches the power source. Not executed. That is, in each unit, the power supply to the batteries 109a to 109c of the own unit in step S307 in the flowchart of FIG. 3 is switched, and the landing operation to the nearest floor is executed using the batteries 109a to 109c of each unit. Is done.

  In addition, when there is a unit with a diagnosis result NG in step S504 (YES in step S504), the capacity calculation unit 206 calculates the battery consumption necessary for landing operation up to the nearest floor in each unit. (Step S505). Here, the amount of power (battery consumption) required for operation until landing on the nearest floor is calculated from the position and load of the elevator car of each unit acquired immediately before the power failure.

  As the movement of the elevator car in the automatic landing operation at the time of a power failure by battery drive, for example, when the elevator car stops in the middle of traveling, the motor is started and the elevator car is caused to travel to the nearest floor. And when it arrives at the nearest floor, the door is opened and the operation of putting the elevator in a rest state is performed. At this time, the required battery capacity is determined by the driving current during travel, the door motor driving current when the door is opened, and the power source current for operating the control unit for moving the elevator car.

  The driving current during battery-powered driving must be calculated from information such as the load value in the elevator car, resistance during driving, motor efficiency, inverter efficiency, battery-driven speed, and distance traveled. Can do. Of these, the parameters that change are the distance traveled and the load in the elevator car. The other parameters are constant regardless of the state at the time of power failure, and are determined uniformly by the size of the car and the type of motor.

  For example, when stopping between floors, since there is a distance to the nearest floor, the elevator car must be driven by battery drive. Therefore, compared with the case where it stops in the state where it exists on a floor, since an electric motor must be operated for a long time, the consumption of a battery increases. Moreover, normally, the landing operation to the nearest floor at the time of a power failure moves in the direction in which the regenerative operation is performed.

  Therefore, when the load in the elevator car is small, the car is pulled by the counterweight, and the up direction becomes the direction of the regenerative operation. On the other hand, when the elevator car is full, the counterweight is pulled by the car, so the down direction is the direction of regenerative operation. By performing such regenerative operation, less power is required for traveling. On the other hand, when there is a load in the car to the extent that the car is balanced with the weight, the pulling force is small, so the power consumption during running increases.

When calculating the battery consumption in step S505, the accurate battery consumption can be calculated based on the position of the car and the load information in the car.
And if the calculation in the capacity | capacitance calculating part 206 is performed, the supply determination part 207 will judge whether the calculation of all the units in a building was completed (step S506), and there exists a unit in which calculation is not completed. In the case (NO in step S506), the process returns to step S505 to perform the calculation of the uncalculated number machine.

When it is determined in step S506 that the calculations for all the units have been completed (YES in S506), the units in the battery diagnosis result OK are arranged in the order of the units with the smallest battery consumption calculated in step S505 (step S507). Then, the supply determination unit 207 determines a battery to supply power to the unit of the battery diagnosis result NG from the arranged results (step S508), and supplies a command to set the determined state to the switching unit 208 (step S508). S509).
Specifically, in step S508, a command is sent to connect the battery of the car that consumes the least amount of battery to the car that has not been landed to the nearest floor due to the battery diagnosis result NG. In step S509, Execute the landing operation up to the nearest floor at the NG unit of the battery diagnosis result NG.

  When there is a deteriorated battery for power failure in this way, the battery with the most capacity is determined and power is supplied to other units. Accordingly, it is possible to prevent the occurrence of a state in which the user cannot land on the nearest floor by executing the landing operation up to the nearest floor with the battery for power failure. In this case, the battery consumption calculation in step S505 can be performed immediately after the occurrence of a power failure, and the arrival to the nearest floor of each unit can be performed without waiting for the completion of the landing operation to the nearest floor in another unit. The floor operation can be executed immediately.

  If it is determined in step S508 that only one battery is sufficient as the battery for supplying power, for example, the battery diagnosis result NG may be simultaneously supplied with power from a plurality of batteries. Good.

[8. Modified example]
In the embodiment described above, the position and load of the elevator car are recorded in the recording unit 205 provided in the power supply switching unit 111 disposed in the building 101, and the switching unit is calculated from the battery capacity calculated from the recorded position and load. A command to be sent to 208 is generated. On the other hand, the position and load of the elevator car are recorded in an external device (for example, an elevator monitoring center) and the switching unit 208 in the power source switching unit 111 uses a command obtained from the external device. The battery may be switched.

Further, the present invention is not limited to the above-described embodiments, and includes various modifications. For example, the above-described embodiments have been described in detail in order to easily understand the present invention, and are not necessarily limited to those having all the configurations described.
For example, in the example of FIG. 1, the system includes three elevator cars. However, the system may be applied to a system including two or four or more elevator cars.

Each of the above-described configurations, functions, processing units, processing means, and the like may be realized by hardware by designing a part or all of them with, for example, an integrated circuit. Each of the above-described configurations, functions, and the like may be realized by software by interpreting and executing a program that realizes each function by the processor. Information such as programs, tables, and files for realizing each function can be stored in a recording device such as a memory, a hard disk, an SSD (Solid State Drive), or a recording medium such as an IC card, an SD card, or a DVD.
Further, the control lines and information lines indicate what is considered necessary for the explanation, and not all the control lines and information lines on the product are necessarily shown. Actually, it may be considered that almost all the components are connected to each other.

  DESCRIPTION OF SYMBOLS 101 ... Building, 102a, 102b, 102c ... Control part, 103a, 103b, 103c ... Electric motor, 104a, 104b, 104c ... Elevator car, 105a, 105b, 105c ... Pulley, 106a, 106b, 106c ... Counterweight, 107a, 107b , 107c ... load sensor, 108 ... commercial power supply, 109a, 109b, 109c ... battery, 110a, 110b, 110c ... power failure detection unit, 111 ... power supply switching unit, 112a, 112b, 112c ... encoder, 201a, 201b ... elevator car control 202a, 202b ... communication unit, 203a, 203b ... battery diagnostic unit, 204 ... communication unit, 205 ... recording unit, 206 ... capacity calculation unit, 207 ... supply determination unit, 208 ... switching unit, 208a, 208b, 208c ... Open and close Switch

Claims (4)

It is an elevator system in which multiple elevator cars are arranged, and each elevator car has a battery for power supply at the time of power failure.
A power failure detection section of the power supply,
A diagnostic unit for the battery;
A control unit for detecting the position and load information of the elevator car;
Generated based on the result of calculating the battery capacity required for landing operation at the nearest floor during a power outage of the elevator car from the car position and load information detected by the control unit when the power outage detection unit detects a power outage And a power source switching unit that switches the battery for each elevator car to a power source for driving the elevator car to which the battery whose diagnosis unit has detected deterioration or insufficient charge capacity is connected in accordance with the issued command. A recording unit for recording the position and load information of the elevator car detected by the control unit;
Based on the position and load information of the elevator car recorded by the recording unit when the power failure detection unit detects a power failure, the battery capacity required for the nearest floor landing operation at the time of power failure of the elevator car is calculated. A capacity calculation unit
The elevator system according to claim 1, wherein the command is generated based on a battery capacity calculated by the capacity calculation unit. The capacity calculation unit is necessary for the nearest floor landing operation at the time of power failure from the position and load information of the elevator car at the time of power failure among the batteries diagnosed by the diagnosis unit as possible at the time of power failure 3. The elevator system according to claim 2, wherein the order in which the battery capacity is low is determined, and the command to switch from a battery with a low battery capacity to a power source for driving another elevator car is preferentially generated. It is a power supply method at the time of an elevator power failure applied to an elevator system in which multiple elevator cars are arranged and each elevator car is equipped with a battery for power supply at the time of power failure.
Power failure detection processing,
A diagnostic process of the battery;
An elevator car control process for detecting the position and load information of the elevator car;
Based on the result of calculating the battery capacity required for the nearest floor landing operation at the time of power failure of the elevator car from the car position and load information detected by the elevator car control process when a power failure is detected in the power failure detection process. Power supply switching processing to switch the battery for each elevator car to the power source for driving the elevator car equipped with the battery whose deterioration or insufficient charge capacity is detected by the diagnostic processing in accordance with the generated command. Supply method.

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