JP2007217112A - Elevator control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a user from receiving uneasiness by maintaining operation without changing operating conditions irrespective of whether a commercial power supply is failed or not. <P>SOLUTION: This control device for operating an elevator by receiving a power from the commercial power supply 1 and operating an elevator by driving a motor 5 by a motor drive part formed of a converter 2, a smoothing capacitor 3, and an inverter 4. The control device comprises a storage device 13 connected between the output lines of the converter 2, a power failure detection means 21 for detecting the power failure of the commercial power supply, a charging and discharging control means 22 for discharging the energy of the storage device to the inverter side during a power failure and continuing the operation of the elevator to a target story, a capacity reduction detection means 23 in which a capacity reference value with a sufficient allowance for the operation to a nearest story is set and detecting that the remaining capacity is lowered to a remaining capacity reference value or below due to the backup discharge of the storage device during the power failure of the commercial power supply, and a charging and discharging control part 22 and an operation control part 25 for operating the elevator to the nearest story in the forward movement direction without changing the operating conditions of the elevator through the operation control means 25 when the lowering of the remaining capacity is detected. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an elevator control device that backs up the operation of an elevator using stored energy of a power storage device when a commercial power supply fails.

  FIG. 11 is a configuration diagram of an elevator control device using a conventional power storage device. In the figure, 1 is a commercial power source, 2 is a converter that converts AC power of the commercial power source 1 into DC power, 3 is a smoothing capacitor that smoothes the DC voltage converted by the converter 2, and 4 is smoothed by the smoothing capacitor 3. It is an inverter that converts the DC power that has been converted into AC power having a variable voltage and variable frequency and supplies the AC power to the electric motor 5. The converter 2, the smoothing capacitor 3, and the inverter 4 constitute an elevator driving unit.

  A main sheave 6 is connected to the rotating shaft of the electric motor 5, and a main rope 7 is wound around the main sheave 6. A car 8 is suspended from one end of the main rope 7, and a counterweight 9 is suspended from the other end of the main rope 7. 10 is a deflecting sheave.

  By the way, in such an elevator control device, when the car 8 rises with a heavy load load or descends with a light load load, electric power generated in the order of commercial power source 1 → converter 2 → smoothing capacitor 3 → inverter 4 When the car 8 descends with a heavy load or rises with a light load, power is generated in the order of the motor 5 → the inverter 4 → the smoothing capacitor 3. Regenerative operation is performed. During this regenerative operation, the regenerative power returning from the motor 5 to the input side of the inverter 4 is blocked by the converter 2, so that the voltage at the input end side of the inverter 4 increases and the elements constituting the converter 2 and the inverter 4 are changed. There is a problem to break.

  Therefore, several overvoltage reduction methods have been used as a countermeasure against overvoltage associated with voltage increase during regenerative operation.

  As one overvoltage reduction method, as shown in FIG. 11, when a discharge circuit 11 including a discharge resistor 11a and a switching element 11b is provided, and the DC voltage appearing between the DC lines P and N reaches a predetermined overvoltage level, In this method, the switching element 11b is turned on, the surplus power energy is converted into heat energy by the discharge resistor 11a and consumed, and the overvoltage is reduced.

  As another overvoltage reduction method, a converter 2 capable of bidirectional conversion (AC → DC, DC → AC) is used, and the regenerative power energy from the motor 5 side is regenerated to the commercial power source 1 side to reduce the overvoltage. It is.

  Further, as a method of effectively using the regenerative power energy, as shown in FIG. 11, a power storage device 13 is connected between the DC lines P and N via the charge / discharge circuit 12, and the charge / discharge control unit 14 detects the voltage. When it is determined that the electric motor 5 is in a regenerative operation from the DC voltage detected by the battery 15, the regenerative power energy generated by the electric motor 5 is stored in the power storage device 13 through the charge / discharge circuit 12.

  When the charging / discharging control unit 14 determines that the electric motor 5 is in the power running operation from the voltage detected by the voltage detector 13, the charging / discharging circuit 12 transfers the stored energy stored in the power storage device 13 between the DC lines P and N. This is a method for reducing the power consumption of the commercial power supply 1 by using it as an energy for driving an electric motor by releasing it. In addition, 12aa and 12ab are switching elements, 12ba and 12bb are diodes, and 12c is a DC reactor.

  Furthermore, there is a method in which the stored energy of the power storage device 13 is discharged between the DC lines P and N through the charge / discharge circuit 12 during a power failure of the commercial power source 1 to be used as a backup power source and used for the rescue operation of the user. However, when used as a backup power source, it is effective when sufficient power storage energy is stored in the power storage device 13, but when the power storage energy of the power storage device 13 decreases, the remaining capacity of the power storage device 13 is estimated. Is difficult. Thus, when a power failure occurs in the commercial power supply 1, it is common to use the stored energy of the power storage device 13 as a backup power source and immediately operate to the nearest floor and stop.

  Conventionally, as a countermeasure against a power failure of the commercial power source 1, a method has been proposed in which an emergency DC power source (battery) is prepared and a user is rescued using the emergency DC power source when the commercial power source 1 is powered off. ing.

In addition to the commercial power source 1, the converter 2, the smoothing capacitor 3, and the inverter (main inverter) 4, the elevator control device includes a charger that converts single-phase AC power of the commercial power source 1 into DC power, and conversion by this charger. An emergency DC power supply for charging the DC power generated, an auxiliary inverter for converting the output of the emergency DC power supply into a rectangular wave single-phase AC, an output line of the auxiliary inverter, and each phase output line of the commercial power supply 1 And a contact provided between the power supply 1, the power supply 1 is energized at the time of a power failure, and the auxiliary inverter is activated. Then, the DC power output from the emergency DC power supply is converted into AC power by an auxiliary inverter, supplied to the output line of the commercial power supply 1 through a contact, and automatic landing operation at the time of power failure is performed (Patent Document 1). ).
Japanese Patent Laid-Open No. 6-32553 (see FIG. 1)

  However, the technique of Patent Document 1 performs automatic landing operation using an emergency DC power supply at the time of a power failure of the commercial power supply 1, and the regenerative power energy generated by the motor 5 during the regenerative operation is stored in the power storage device 13. This is not a technique for storing electricity and effectively using the energy stored in the power storage device 13 during powering operation or during a power failure of the commercial power source 1.

  Moreover, the technique of patent document 1 needs to be equipped with a charger, an emergency DC power supply, an auxiliary inverter, etc. in addition to the commercial power source 1, the converter 2, the capacitor 3 and the inverter 4 as a power failure countermeasure for the commercial power source 1. Yes, the entire apparatus becomes a large-scale configuration.

  In addition, since the input side voltage of the inverter 4 is controlled to be substantially equal to that at the time of commercial power supply when the commercial power supply 1 is interrupted, and the automatic landing speed at the time of the power failure is continuously variably controlled up to the rated speed, the user There is a problem that causes extra anxiety.

  The present invention has been made in view of the above circumstances, and detects a decrease in the capacity of the power storage device regardless of the power capacity that operates to the nearest floor or the evacuation floor, and does not change the operation state when the capacity decreases. An object of the present invention is to provide an elevator control device that can be operated until the vehicle is operated and the user is not disturbed.

(1) In order to solve the above-described problems, the present invention provides a converter that converts AC power of a commercial power source into DC power, and an inverter that converts the DC power converted by the converter into a variable voltage variable frequency and outputs it. The motor is driven by the AC power output from the inverter to drive the elevator, and the inverter is controlled to output the AC power of the desired variable voltage and variable frequency based on a speed command of a predetermined operation pattern. And an elevator control device provided with an operation control means for operating the electric motor at a variable speed, a power storage device connected between output lines of the converter via a charge / discharge circuit, and a state in which the output voltage of the commercial power supply is reduced A power failure detection means for detecting a power failure from the power source, and the regenerative power energy generated by the motor during the regenerative operation of the motor. The power storage device stores power via a discharge circuit, and the power storage energy of the power storage device is released to the inverter side via the charge / discharge circuit during powering operation of the motor, and the power failure of the commercial power supply by the power failure detection means Charge / discharge control means for continuing operation to the destination floor of the elevator by discharging the storage energy of the power storage device as a backup power source to the inverter side via the charge / discharge circuit at the time of detection, and up to the nearest floor A capacity reference value having a sufficient margin than the power capacity required for the operation of the power supply is set, and the remaining capacity due to backup discharge of the power storage device is less than or equal to the capacity reference value when the power failure is detected by the power failure detection means A capacity drop detecting means for detecting whether the capacity has dropped, and when the capacity drop detecting means detects a drop in the remaining capacity, An elevator control device provided with means for operating to the nearest floor in the traveling direction without changing the operation state of the elevator through the steps.

  With the above configuration, the present invention uses the stored energy of the power storage device as a backup power source at the time of a power failure of the commercial power supply, and drives the electric motor via an inverter without changing the operating state of the elevator. Continue to drive to the destination floor. At this time, the capacity drop detecting means compares the remaining capacity due to the backup discharge of the power storage device at the time of a power failure of the commercial power supply with a capacity reference value having a sufficient margin for operation up to the nearest floor in advance. When it falls below the reference value, the operation state of the elevator is not changed and the operation is stopped up to the nearest floor in the traveling direction, so it can be operated in a state unrelated to the power capacity operating up to the nearest floor, It is possible to lower the user to the destination floor and the nearest floor in the traveling direction without giving the user anxiety.

  In addition, by adopting the same configuration as described above, using the stored energy of the power storage device as a backup power source in the event of a power failure of the commercial power supply, and driving the motor via an inverter, the target floor is maintained without changing the operating state of the elevator. The capacity reduction detecting means is a capacity having a sufficient margin than the remaining capacity due to the backup discharge of the power storage device and the power capacity required for the operation up to the evacuation floor at the time of a power failure of the commercial power source. When the remaining capacity is reduced below the capacity reference value by comparing with the reference value, it is also possible to drive and stop to the evacuation floor in the traveling direction of the elevator.

(2) Further, according to the present invention, the component described in (1) is newly provided in the charge / discharge control unit or the operation control unit, and travels to the nearest floor or the evacuation floor in the traveling direction of the elevator. Message data storage means for storing message data for transmitting information, notification means provided in the car, and when the remaining capacity reduction is detected by the capacity reduction detection means, the message data storage means When the message data is read and the means for outputting the message data from the notification means is provided, when the remaining capacity is reduced below the capacity reference value even when the commercial power supply is continuously operated at the time of power failure, the traveling direction Since the message data to drive the elevator to the nearest floor or evacuation floor is transmitted to the user, the destination floor and To the nearest floor or the evacuation floor in the traveling direction it is possible to unload the user.

(3) The elevator control device according to the present invention includes, as the capacity decrease detection unit described above, a current value integration unit that integrates the current flowing into and out of the power storage device, and the current value when the power failure is detected by the power failure detection unit. The remaining capacity of the power storage device is obtained from the integrated current value of the integrating means, and the remaining capacity is compared with a capacity reference value set for operation up to the nearest floor or evacuation floor to reduce the remaining capacity of the power storage device. By providing the means for determining, it is possible to accurately determine the decrease in the remaining capacity of the power storage device.

  Further, as another capacity decrease detecting means, a means for detecting the storage voltage of the power storage device and determining the remaining capacity, and the remaining capacity of the power storage device determined by the determining means and driving to the nearest floor or the evacuation floor are operated. Therefore, it is possible to accurately determine the decrease in the remaining capacity of the power storage device by providing a means for comparing the capacity reference value set for this purpose and determining a decrease in the remaining capacity of the power storage device.

  Furthermore, if the reference value of the remaining capacity is changed according to the ambient temperature of the power storage device or the number of times of charge / discharge, the remaining capacity of the power storage device is reduced without being affected by the ambient temperature or the number of times of charge / discharge. Thus, the time from when the elevator becomes inoperable can be made constant, and even when the preset capacity reference value is small, the elevator can be reliably operated and stopped at the nearest floor or evacuation floor.

  According to the present invention, the capacity reduction of the power storage device is detected regardless of the power capacity that operates to the nearest floor or the evacuation floor, and when it is determined that the capacity is reduced, the operation state is not changed and it is ensured to the nearest floor or evacuation floor Therefore, it is possible to provide an elevator control device that can be lowered to the nearest floor or the evacuation floor without giving anxiety to the user.

Embodiments of the present invention will be described below with reference to the drawings.
(First embodiment)
FIG. 1 is a block diagram showing a first embodiment of an elevator control apparatus according to the present invention. In the figure, components common to those in FIG. 11 are denoted by the same reference numerals, and detailed description thereof is omitted.
In the figure, 1 is a commercial power source, 2 is a converter, 3 is a smoothing capacitor, 4 is an inverter that converts DC power smoothed by the smoothing capacitor 3 into AC power of variable voltage and variable frequency and supplies it to the motor 5. . The converter 2, the smoothing capacitor 3, and the inverter 4 constitute an elevator driving unit. Further, 6 is a main sheave, 7 is a main rope, 8 is a passenger car, 9 is a counterweight, and 10 is a deflecting sheave.

  A discharge circuit 11 in which a discharge resistor 11a and a switching element 11b are connected in series is provided between the DC lines P and N corresponding to both ends of the smoothing capacitor 3 constituting the elevator driving unit. The discharge circuit 11 has a function of turning on the switching element 11b as necessary, and converting surplus power energy into heat energy by the discharge resistor 11a and consuming it.

  In addition, a power storage device 13 is connected between the DC lines P and N via the charge / discharge circuit 12. In the charging / discharging circuit 12, switching elements 12aa and 12ab such as self-extinguishing elements are connected in series between the DC lines P and N, and diodes 12ba and 12bb are individually connected in parallel to the switching elements 12aa and 12ab, respectively. ing. One end of a DC reactor 12c that smoothes DC power is connected to a common connection point of the switching elements 12aa and 12ab. A power storage device 13 is provided between the other end of the DC reactor 12c and the DC line N described above.

  Furthermore, in the elevator control device according to the present invention, the power failure detection means 21 is connected to the output line of the commercial power source 1. The power failure detection means 21 detects a power failure of the commercial power source 1 from the lowered output voltage of the commercial power source 1 and sends a power failure detection signal to the charge / discharge control unit 22.

  The charge / discharge control unit 22 is provided with an original charge / discharge control function 22a, a backup power supply control function 22b, and a capacity drop detection means 23.

  The charge / discharge control unit 22 determines the regenerative operation or power running operation of the electric motor 5 from the DC voltage between the DC lines P and N detected by the voltage detector 24, and performs charge control on the charge / discharge circuit 12 based on the determination result. Or it has the function to perform discharge control. This corresponds to the original charge / discharge control function 22a described above.

  Further, when the charge / discharge control unit 22 receives a power failure detection signal from the power failure detection means 21, the charge / discharge control unit 22 sends the power failure detection signal to the operation control unit (also referred to as a main controller) 25 and controls the charge / discharge circuit 12 to discharge. In addition, the storage energy stored in the power storage device 13 is discharged between the DC lines P and N and used as a backup power source. This corresponds to the backup power supply control function 22b described above.

  The capacity drop detection means 23 is set with a capacity reference value (threshold value) that is regarded as a drop in the remaining capacity (storage capacity) of the power storage device 13, and for example, a storage capacity detector comprising a voltage detector 26a and a current detector 26b. The remaining capacity of the power storage device 13 detected by the above is compared with the capacity reference value, a decrease state of the remaining capacity is detected, and a remaining capacity decrease signal is sent to the operation control unit 25. As the capacity reference value regarded as a decrease in the remaining capacity, one or both of the first capacity reference value and the second capacity reference value are set as shown in FIG. The first capacity reference value is a power capacity that has a sufficient margin than the power capacity required for operation up to the nearest floor, and is usually a standard equivalent to operating one floor above and below the current floor. The value is set, but here it is assumed that the distance between the floors varies depending on the building even if it is one floor above and below, and for example, a capacity reference value required for driving a distance of at least two floors is set. It will be. The second capacity reference value is a power capacity sufficiently larger than the power capacity required for operation up to the evacuation floor. For example, the elevator operates the floor (current floor) farthest from the evacuation floor. For example, this corresponds to a power capacity that allows sufficient operation from the current floor to the evacuation floor even in powering operation.

  As the storage capacity detector, the remaining capacity of the storage device 13 is calculated using the voltage detector 26a and the current detector 26b. However, for example, a power detector may be used, or a current detector or a voltage detector. The remaining capacity may be calculated indirectly from the current value or the voltage value detected in step (b).

  The operation control unit 25 registers the call floor for the hall call and the car call, and generates a torque command corresponding to the speed deviation between the detected speed of the electric motor 5 detected by the speed detector 27 and the speed pattern related to the required destination floor. And an operation control function for performing other processes necessary for the operation of the elevator, and an electric motor drive control function for controlling the inverter 4 based on a torque command obtained by the operation control function.

  The operation of the elevator control apparatus as described above will be described.

(1) About the process when the commercial power supply is energized.

  When AC power is supplied from the commercial power source 1, the converter 2 converts the AC power of the commercial power source 1 into DC power and outputs it between the DC lines P and N. Here, the smoothing capacitor 3 smoothes the pulsation contained in the DC power converted by the converter 2 and applies it between the input side terminals of the inverter 4.

  At this time, the operation control unit 25 controls the switching element of the inverter 4 based on the detected speed of the electric motor 5 obtained from the speed detector 27 and a predetermined operation pattern, and the variable voltage corresponding to the operation pattern speed from the inverter 4. The elevator is operated at a predetermined traveling speed by outputting variable frequency AC power and driving the electric motor 5.

  The charging / discharging control unit 22 takes in the DC voltage between the DC lines P and N detected by the voltage detector 24 during traveling of the elevator, and determines the regeneration / power running operation of the electric motor 5. During the regenerative operation of the electric motor 5, the switching element 12 aa of the charge / discharge circuit 12 is turned on, and the regenerative power energy generated by the electric motor 5 is stored in the power storage device 13 through the charge / discharge circuit 12. On the other hand, during the power running operation of the electric motor 5, the switching element 12ab is turned on, and the stored energy stored in the power storage device 13 is discharged between the DC lines P and N through the charge / discharge circuit 12, thereby reducing the power consumption of the commercial power source 1. And energy saving is realized. Here, the charge / discharge control unit 22 executes the above-described charge / discharge control function 22a.

  In the regenerative operation of the electric motor 5, the regenerative power energy generated by the electric motor 5 is stored in the power storage device 13. When the stored energy (power storage capacity) exceeds the specified power storage capacity of the power storage device 13, the switching element 11b. Is turned on, and surplus power energy is converted into heat energy by the discharge resistor 11a and consumed.

(2-1) About the nearest floor operation process at the time of a power failure of the commercial power source 1.

  As a process at the time of a power failure of the commercial power supply 1, a predetermined process shown in FIG. 3 is executed while the charge / discharge control unit 22 and the operation control unit 25 are linked.

  The power failure detection means 21 detects a power failure of the commercial power source 1 from the reduced state of the AC voltage output from the commercial power source 1 when the elevator is traveling, and sends a power failure detection signal to the charge / discharge control unit 22. Here, the charge / discharge control unit 22 executes the backup power supply control function 22b described above.

  That is, the backup power supply control function of the charge / discharge control unit 22 determines whether or not a power failure has occurred (S1), determines that a power failure has occurred in the commercial power source 1 when receiving a power failure detection signal from the power failure detection means 21, and operates. In addition to notifying the control unit 25 of the occurrence of a power failure, the backup power supply control function 22b is executed. That is, the charge / discharge control unit 22 performs discharge control of the charge / discharge circuit 12, uses the stored energy stored in the power storage device 13 as a backup power source, discharges it between the DC lines P and N, drives the motor 5, and thus the elevator. Continue driving.

  When receiving the notification of the occurrence of a power failure, the operation control unit 25 sets the predetermined power failure operation speed (S2). At this time, if the car 8 is moving from the first floor to the fifth floor (the destination floor), for example, the operation is continued toward the destination floor at the power outage speed despite the occurrence of a power outage. (S3).

  On the other hand, the storage capacity decrease detection means 23 is a storage capacity detector that is set with a capacity reference value with sufficient margin for driving the elevator to the nearest floor, and is composed of, for example, a voltage detector 26a and a current detector 26b. The detected remaining capacity of the power storage device 13 is compared with the capacity reference value, and when the remaining capacity becomes equal to or less than the capacity reference value, it is determined that the remaining capacity of the power storage device 13 is decreased (S4), It is sent to the operation control unit 25.

  Here, the operation control unit 25 conventionally uses the stored energy of the power storage device 13 as a backup power source at the time of a power failure of the commercial power supply 1 and immediately drives to the nearest floor and stops, or the power storage device 13 falls below the reference value. It is common to stop immediately. However, in the present invention, when the remaining capacity decrease signal is received from the storage capacity decrease detection means 23 via the charge / discharge control unit 22, the operation is continued to the nearest floor in the traveling direction of the elevator while maintaining the power failure speed ( S5). Then, when the elevator approaches the nearest floor, it is landed while decelerating (S6), and after the door is opened, the door is closed and stopped.

  Therefore, according to the embodiment as described above, the backup power supply control function 22b of the charge / discharge control unit 22 operates when a power failure occurs in the commercial power supply 1, and discharges the stored energy of the power storage device 13 through the charge / discharge circuit 12. 5 is back-up driven, the energy stored in the power storage device 13 can be used effectively.

  Further, when the commercial power supply 1 is blacked out, the conventional operation immediately stops and stops at the nearest floor. However, in the present invention, since the operation is continued to the destination floor as it is, the user can be made to the destination floor without giving anxiety. Can carry up to. Then, when the remaining capacity of the power storage device 13 decreases to the first capacity reference value for the operation at the nearest floor, it is determined that the remaining capacity of the power storage device 13 is decreased, and the direction of travel is the same as the previous traveling direction. Driving to the nearest floor, the users remaining in the car 8 can reliably get off at the nearest floor in the shortest time.

(2-2) About evacuation floor operation processing at the time of a power failure of commercial power.

  As a process at the time of a power failure of the commercial power supply 1, a predetermined process shown in FIG. 4 is executed while the charge / discharge control unit 22 and the operation control unit 25 are linked.

  The power failure detection means 21 detects a power failure of the commercial power source 1 from the reduced state of the AC voltage output from the commercial power source 1 when the elevator is traveling, and sends a power failure detection signal to the charge / discharge control unit 22. Here, the charge / discharge control unit 22 executes the backup power supply control function 22b described above.

  That is, the charge / discharge control unit 22 determines whether or not a power failure has occurred (S11). When the power failure detection signal is received from the power failure detection means 21, the charge / discharge control unit 22 determines that the commercial power source 1 has failed. Notifying the occurrence, the backup power supply control function 22b is executed. That is, the charge / discharge control unit 22 performs the discharge control of the charge / discharge circuit 12, uses the stored energy stored in the power storage device 13 as a backup power source, and discharges it between the DC lines P and N, thereby driving the motor 5. Continue to operate the elevator.

  When receiving the notification of the occurrence of a power failure, the operation control unit 25 sets a predetermined power failure operation speed (S12). At this time, when the car 8 is moving from the first floor to the fifth floor, for example, the operation is continued toward the destination floor at the power outage speed despite the occurrence of a power outage (S13).

  At this time, the capacity drop detecting means 23 is set with a capacity reference value having a sufficient margin for operation up to the evacuation floor, and is detected by a storage capacity detector comprising a voltage detector 26a and a current detector 26b. 13 is compared with the capacity reference value, and when the remaining capacity falls below the capacity reference value, it is determined that the remaining capacity of the power storage device 13 has decreased (S14), and a remaining capacity decrease signal is sent to the operation control unit 25. To do.

  Here, the operation control unit 25 conventionally uses the stored energy of the power storage device 13 as a backup power source at the time of a power failure of the commercial power supply 1 and immediately drives to the nearest floor and stops, or the power storage device 13 falls below the reference value. It is common to stop immediately. However, in the present invention, when the remaining capacity lowering signal is received, the operation is continued to the refuge floor in the traveling direction of the elevator while maintaining the power failure operation speed (S15). Then, when the elevator approaches the evacuation floor, the elevator landes while decelerating (S16), and after the door is opened, the door is closed and stopped.

  Therefore, according to the above embodiment, in addition to the same effect as described in the item (2-1), the remaining capacity of the power storage device 13 is reduced to the capacity required for the operation of the evacuation floor. In this case, it is determined that the remaining capacity is reduced and the vehicle is driven to the evacuation floor, so that the users remaining in the car 8 can be reliably lowered to the evacuation floor in the shortest time.

(Second Embodiment)
FIG. 5 is a block diagram showing a second embodiment of the elevator control apparatus according to the present invention.
Since this elevator control device has substantially the same configuration as that of FIG. 1, the same reference numerals are given to the same components as those in FIG. 1, the detailed description thereof will be omitted, and the following will be different from FIG. The part will be described.
In this embodiment, the message data storage unit 30 is provided in any one of the charge / discharge control unit 22 and the operation control unit 25. The message data storage unit 30 determines that the remaining capacity of the power storage device 13 is low, and when driving to the nearest floor or evacuation floor, for example, due to a power failure, the elevator is operated to the nearest floor or evacuation floor and interrupted. Stores image or audio message data as contents. The car 8 is usually provided with a display means 31 and at least broadcasting means 32 such as a speaker.

  Therefore, in the elevator control device according to the present invention, when a decrease in the remaining capacity of the power storage device 13 is detected in step S4 or S14 in the series of processes shown in FIG. 3 or FIG. The unit 25 reads image or audio message data from the message data storage unit 30 and transmits the image or audio message data to the car 8 by wireless or wired means. Then, message data indicating that the elevator is operated and interrupted from the display unit 31 of the car 8 or the broadcasting means 32 such as a speaker to the nearest floor or the evacuation floor is displayed or voice output, and the user who is on board To tell.

  Furthermore, after transmitting the message data from the charge / discharge control unit 22 or the operation control unit 25, the operation control unit 25 executes the operation process of steps S5 and S6 shown in FIG. 3 or steps S15 and S16 shown in FIG. Continue driving to the nearest or condemned floor. Then, when the elevator approaches the nearest floor or evacuation floor, the elevator lands on the nearest floor or evacuation floor while decelerating, and the elevator is stopped.

  Therefore, according to this embodiment, when it is determined that the remaining capacity of the power storage device 13 is reduced, message data for driving to the nearest floor or evacuation floor and interrupting is displayed or output by voice, thus eliminating the user's anxiety. be able to. In other words, because the elevator has been driven to the destination floor when the commercial power supply 1 is cut off, it is expected that the user will continue to operate after arrival at the destination floor or stop at any floor. By outputting message data for driving to the nearest floor or evacuation floor, the user can recognize the operation of the elevator after arrival at the destination floor and can be relieved.

(Third embodiment)
FIG. 6 is a block diagram showing a specific example of the capacity drop detecting means 23 which is a part of the elevator control apparatus according to the present invention.
The capacity decrease detecting means 23 detects a decrease in the remaining capacity of the power storage device 13 from the integrated value of the current input / output from the power storage device 13 detected by the current detector 26b installed between the power storage device 13 and the DC reactor 12c. To do. The capacity drop detecting means 23 is composed of, for example, a current value integrating means 41, a capacity initial value setting means 42, a remaining capacity calculating means 43, and a comparing means 44.

  The current value integrating means 41 integrates the current values detected continuously or intermittently by the current detector 26 b and outputs the accumulated current values as the current remaining capacity of the power storage device 13. The capacity initial value setting means 42 takes in the current integrated value integrated by the current value integration means 41 when receiving the power failure detection signal from the power failure detection means 21 or current value integration means when receiving the power failure detection signal. The integrated current value at the time of occurrence of power failure is set from 41, and the set integrated current value is used as the initial capacity value.

  The remaining capacity calculating means 43 subtracts the remaining capacity, which is the current integrated value of the current value integrating means 41 after the occurrence of the power failure, from the initial capacity value set in the initial capacity setting means 42, and the remaining capacity of the power storage device 13 at each time point. Calculate capacity. The comparison means 44 is set with a current reference value (threshold value) corresponding to determining that the preset remaining capacity is reduced, and compares the remaining capacity output from the remaining capacity calculation means 43 with the reference value. When the remaining capacity becomes equal to or less than the reference value, it is determined that the remaining capacity has decreased, and a remaining capacity decrease detection signal is sent to the operation control unit 25.

The operation of the storage capacity decrease detection means 23 as described above will be described with reference to FIG.
The charge / discharge control unit 22 determines whether the regenerative operation or the power running operation is performed based on the DC voltage between the lines P and N detected by the voltage detector 24 during normal operation of the elevator, and performs charge control on the charge / discharge circuit 12 during the regenerative operation. To do. At this time, the current value integrating means 41 of the capacity decrease detecting means 23 adds and integrates the current values flowing into the power storage device 13. On the other hand, since the charge / discharge circuit 12 is controlled to be discharged during the power running operation, the current value integration unit 41 of the capacity decrease detection unit 23 subtracts and integrates the current value flowing out from the power storage device 13. Therefore, the current value integration means 41 calculates the current storage capacity of the power storage device 13 at the current time, and hence the integrated current value corresponding to the remaining capacity.

  By the way, when the commercial power source 1 has a power failure, the power failure detection means 21 determines that a power failure has occurred due to a decrease in AC voltage, and sends a power failure detection signal to the charge / discharge control unit 22. The charge / discharge control unit 22 activates the backup power supply control function 22b simultaneously with receiving the power failure detection signal, and thereafter controls the charge / discharge circuit 12 to discharge. As a result, after the occurrence of a power failure, the current detector 26b continues to detect the discharge current flowing out from the power storage device 13.

  Further, when receiving the power failure detection signal, the current value integrating means 41 of the capacity drop detecting means 23 determines that a power failure has occurred as shown in FIG. 2, and determines the current integrated value corresponding to the remaining capacity of the power storage device 13 as the initial capacity value. Is set in the capacity initial value setting means 42, and then the current integrated value of the current value integrating means 41 is cleared.

  Thereafter, the current value integration means 41 integrates the discharge current detected by the current detector 26 b and continues to send it to the remaining capacity calculation means 43.

  Here, the remaining capacity calculation means 43 subtracts the integrated value of the discharge current from the capacity initial value set in the capacity initial value setting means 42 to calculate the remaining capacity of the power storage device 13 at each time point. Therefore, the remaining capacity of the power storage device 13 gradually decreases with the passage of time t as shown by the arrow (A). Then, when the remaining capacity output from the remaining capacity calculating means 43 falls to the level of the first capacity reference value (capacity reference value for the nearest floor), for example, the comparison means 44 is inverted from 0 level to 1 level, for example. Then, the remaining capacity reduction signal is sent to the operation control unit 25. Note that the elevator drivability level shown in FIG. 2 means the remaining capacity at which the power storage device 13 can not be drivable.

  Here, the operation control unit 25 determines that the remaining capacity has decreased in step S4 or step S14 shown in FIG. 3 or FIG. 4 described above, and performs the operation toward the nearest floor or the evacuation floor.

  Therefore, according to the embodiment as described above, the current integrated value of the current value integrating means 41 at the time of the power failure of the commercial power supply 1 is set as the initial capacity value, and thereafter the discharge current flowing out from the power storage device 13 is sequentially integrated. By sequentially subtracting from the initial capacity value, the remaining capacity at each time point of the power storage device 13 can be accurately obtained. Then, if this remaining capacity is compared with a predetermined capacity reference value, it is possible to accurately determine a decrease in the remaining capacity.

  In this embodiment, the remaining capacity is obtained from the discharge current flowing out from the power storage device 13. However, for example, as shown in FIG. 7, the relationship between the voltage of the power storage device 13 and the remaining capacity as the power storage capacity is defined. A remaining capacity determining unit 47 that determines the remaining capacity of the power storage device 13 by referring to the related data stored in the related data storage unit 46 based on the voltage V of the power storage device 13 after the occurrence of a power failure; If the comparison means 48 for comparing the remaining capacity determined by the remaining capacity determination means 47 with the voltage reference value corresponding to the determination that the remaining capacity has decreased is provided, the remaining capacity decrease can be reduced from the voltage V of the power storage device 13. It can be judged accurately.

(Fifth embodiment)
FIG. 8 is a diagram for explaining an example of changing the reference value used for the comparison means 44 and 48 of the capacity drop detection means 23 which is a part of the elevator control apparatus according to the present invention.
The power storage device 13 is one component of the elevator system, and is fixedly installed at an appropriate location in the building. Accordingly, there is a certain relationship between, for example, the ambient temperature that is one of the installation environments of the power storage device 13 and the discharge characteristics of the power storage device 13. When the ambient temperature is high, the discharge capacity of the power storage device 13 increases as shown in FIG. 9, and as a result, the time until the remaining capacity of the power storage device 13 is reached from the reference value where the elevator cannot be driven is shortened. On the other hand, when the ambient temperature is low, the discharge capacity of power storage device 13 decreases, and the time from the reference value to the remaining capacity of power storage device 13 at which the elevator cannot be driven increases.

  Therefore, in this embodiment, first, after determining the operation time T necessary for the elevator to reach the nearest floor or the evacuation floor from the destination floor with a certain margin under the power outage operation speed, The arrival time from the capacity reference value with respect to the average temperature around the device 13 until reaching the remaining capacity of the power storage device 13 where the elevator cannot be driven is determined, and the center reference value is determined such that the arrival time becomes equal to the operation time T. To do.

  Then, for a plurality of temperatures higher than the average temperature and a plurality of temperatures lower than the average temperature, a reference value that is similarly equal to the operation time T is found, and the relationship between each ambient temperature and the reference value is tabled. Turn into. Alternatively, a means for selecting a relatively high temperature and a relatively low temperature from the average temperature, finding a reference value equal to the operation time T for each temperature, and continuously changing the reference value in a proportional distribution is provided. In the present embodiment, a temperature detector that detects the ambient temperature of power storage device 13 is provided.

  Then, when the power failure occurs, the ambient temperature of the power storage device 13 is taken from the temperature detector, and the reference value is changed according to the ambient temperature as shown in FIG. 8, so that the elevator cannot be driven from the reference value. The arrival time until the remaining capacity of 13 is reached is always constant. As a result, after the remaining capacity of the power storage device 13 reaches the reference value and it is determined that the capacity is reduced, the elevator can surely arrive at the nearest floor or the evacuation floor regardless of the increase or decrease in the ambient temperature of the power storage device 13. it can.

  Thereby, in this Embodiment, the remaining capacity according to the installation environment of the electrical storage apparatus 13 can be determined, and an elevator can be made to arrive at the nearest floor or an evacuation floor stably at the time of the occurrence of a power failure.

(Sixth embodiment)
FIG. 10 is a diagram for explaining another modification example of the reference value used for the comparison means 44 and 48 of the storage capacity decrease detection means 23 as in the fifth embodiment. That is, the fifth embodiment is an example in which the reference value is changed according to the ambient temperature of the power storage device 13, but in the present embodiment, the reference value is changed according to the number of times of charging / discharging.

  In general, there is a large causal relationship between the decreasing tendency of the remaining capacity during the discharging of the power storage device 13 and the number of times of charging / discharging. FIG. 10 conceptually shows the number of charge / discharge cycles and the size of the remaining capacity. The same applies to various electronic devices that repeatedly charge and discharge.

  Therefore, in the present embodiment, the relationship between the number of charge / discharge cycles of the power storage device 13 and the decrease in the remaining capacity during the discharge of the power storage device 13 is grasped, and the elevator cannot be driven from the reference value, as in the fifth embodiment. A reference value with a constant arrival time until reaching the remaining capacity of the power storage device 13 is found and is tabulated, for example. Further, coefficient means for counting the number of times of charging / discharging the power storage device 13 is provided.

  Then, by changing the reference value according to the number of times of charging / discharging of the power storage device 13, the arrival time from the reference value until reaching the remaining capacity of the power storage device 13 where the elevator cannot be driven is always constant. . As a result, after the remaining capacity of the power storage device 13 reaches the reference value and it is determined that the capacity is reduced, the elevator can surely arrive at the nearest floor or the evacuation floor even if the number of charge / discharge cycles of the power storage device 13 increases. it can.

  Thereby, in this Embodiment, determination of the remaining capacity fall can be performed in consideration of the repeated use frequency of the electrical storage apparatus 13, and an elevator can always arrive at the nearest floor or an evacuation floor stably at the time of a power failure occurrence. .

  In addition, this invention is not limited to the said embodiment, In the range which does not deviate from the summary, various deformation | transformation can be implemented. Moreover, each embodiment can be implemented in combination, and in that case, the effect of the combination can be obtained.

1 is a configuration diagram showing a first embodiment of an elevator control device according to the present invention. FIG. The figure explaining the relationship between the change of the remaining capacity of the electrical storage apparatus after the power failure generation | occurrence | production, and the reference value explaining operation | movement of an electrical storage capacity fall detection means. The processing flow figure to the nearest floor landing of the elevator at the time of a power failure of commercial power. The processing flow figure to the evacuation floor landing of the elevator at the time of the power failure of a commercial power source. The block diagram which shows 2nd Embodiment of the elevator control apparatus which concerns on this invention. The block diagram which shows one specific example of the electrical storage capacity fall detection means used as a part of the elevator control apparatus which concerns on this invention. The block diagram which shows the other specific example of the electrical storage capacity fall detection means used as a part of elevator control apparatus which concerns on this invention. The figure explaining the example of a change of the reference value used for the comparison means of the electrical storage capacity fall detection means used as a part of the elevator control apparatus which concerns on this invention. The figure explaining the relationship between the ambient temperature of an electrical storage apparatus and the discharge capacity of an electrical storage apparatus in an image. The figure explaining the other example of a change of the reference value used for the comparison means of the electrical storage capacity fall detection means which becomes a part of the elevator control apparatus which concerns on this invention. The block diagram of the elevator control apparatus using the conventional electrical storage apparatus.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Commercial power supply, 2 ... Converter, 3 ... Smoothing capacitor, 4 ... Inverter, 5 ... Electric motor, 12 ... Charge / discharge circuit, 13 ... Power storage device, 21 ... Power failure detection means, 22 ... Charge / discharge control part, 22a ... Charge / discharge Control function, 22b ... backup power supply control function, 23 ... storage capacity drop detection means, 24 ... voltage detector, 25 ... operation control unit, 26a ... voltage detector, 26b ... current detector, 27 ... speed detector, 30 ... Message data storage unit 31 ... Display unit 32 ... Broadcast means 41 ... Current value integration means 42 ... Capacity initial value setting means 43 ... Remaining capacity calculation means 44 ... Comparison means 46 ... Relational data storage section 47: remaining capacity determining means, 48 ... comparing means.

Claims (7)

A converter that converts AC power from commercial power into DC power, an inverter that converts DC power converted by this converter into variable voltage and variable frequency, and an elevator that is driven by AC power output from this inverter An electric motor that travels, and an operation control means that controls the inverter so as to output AC power having a desired variable voltage and variable frequency based on a speed command of a predetermined operation pattern, and operates the motor at a variable speed. In the elevator control system,
A power storage device connected via a charge / discharge circuit between output lines of the converter;
A power failure detection means for detecting a power failure from a drop in the output voltage of the commercial power supply;
Regenerative power energy generated by the motor during the regenerative operation of the motor is stored in the power storage device via the charge / discharge circuit, and the storage energy of the power storage device is stored via the charge / discharge circuit during powering operation of the motor. By discharging to the inverter side and using the power storage energy of the power storage device as a backup power source when a power failure is detected by the power failure detection means by the power failure detection means, the energy is released to the inverter side through the charge / discharge circuit. Charge / discharge control means for continuing operation to the destination floor;
A capacity reference value that is sufficiently larger than the power capacity required for operation up to the nearest floor is set, and the remaining capacity due to backup discharge of the power storage device when the power failure is detected by the power failure detection means is the capacity. A capacity drop detecting means for detecting that the drop has fallen below a reference value;
Elevator control comprising: means for operating up to the nearest floor in the traveling direction without changing the operation state of the elevator through the operation control means when the capacity reduction detecting means detects a decrease in the remaining capacity. apparatus. A converter that converts AC power from commercial power into DC power, an inverter that converts DC power converted by this converter into a variable voltage and variable frequency, and a car that is driven by AC power output from this inverter. An electric motor for driving and driving control means for controlling the inverter so as to output AC power of a desired variable voltage and variable frequency based on a speed command of a predetermined driving pattern, and driving the motor at a variable speed; In the provided elevator control device,
A power storage device connected via a charge / discharge circuit between output lines of the converter;
A power failure detection means for detecting a power failure from a drop in the output voltage of the commercial power supply;
Regenerative power energy generated by the motor during the regenerative operation of the motor is stored in the power storage device via the charge / discharge circuit, and the storage energy of the power storage device is stored via the charge / discharge circuit during powering operation of the motor. By discharging to the inverter side and using the power storage energy of the power storage device as a backup power source when a power failure is detected by the power failure detection means by the power failure detection means, the energy is released to the inverter side through the charge / discharge circuit. Charge / discharge control means for continuing operation to the destination floor;
A capacity reference value that is sufficiently larger than the power capacity required for operation up to the evacuation floor is set, and the remaining capacity due to backup discharge of the power storage device when the power failure is detected by the power failure detection means is the capacity reference A capacity drop detecting means for detecting whether or not the value has fallen below the value;
An elevator control apparatus comprising: a means for driving to the evacuation floor in the traveling direction of the elevator through the charge / discharge control means and the operation control means when the capacity drop detection means detects a decrease in the remaining capacity. . In the elevator control device according to claim 1 or 2,
Message data storage means for storing message data provided in the charge / discharge control means or the operation control means, for storing message data for transmitting traveling to the nearest floor or evacuation floor in the traveling direction of the elevator,
An informing means provided in the car;
An elevator control apparatus, further comprising means for reading message data from the message data storage means and outputting message data from the notification means when the remaining capacity reduction is detected by the capacity drop detection means. In the elevator control device according to any one of claims 1 to 3,
The capacity reduction detecting means includes a current value integrating means for integrating the current flowing in and out of the power storage device, and a remaining power of the power storage device from a current integrated value of the current value integrating means when a power failure is detected by the power failure detecting means. Means for obtaining a capacity, comparing the remaining capacity with a capacity reference value set for driving to the nearest floor or the evacuation floor, and determining a decrease in the remaining capacity of the power storage device; Elevator control device characterized. In the elevator control device according to any one of claims 1 to 3,
The capacity decrease detecting means detects the storage voltage of the power storage device and determines the remaining capacity, and operates the remaining capacity of the power storage device determined by the determining means and the nearest floor or the evacuation floor. An elevator control device comprising: means for comparing with a capacity reference value set to 1 and determining a decrease in the remaining capacity of the power storage device. In the elevator control device according to claim 4 or 5,
The remaining capacity reference value is changed according to an ambient temperature of the power storage device. In the elevator control device according to claim 4 or 5,
The remaining capacity reference value is changed according to the number of times of charging / discharging of the power storage device.

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