JP2005324884A - Elevator control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make uniform the power consumption by using the regenerated power effectively. <P>SOLUTION: An elevator control device is equipped with a rectifier 2, an inverter 4 to convert DC into AC and supply to a motor when the motor 8 of an elevator is in power running and feed the regenerated power of the motor to the rectifier upon inverting into DC when the motor is in the regenerative operation, an accumulating device 18, and a charge/discharge circuit 19, wherein the arrangement further includes an operating past performance learning means 32 to prepare the power running regeneration learning information to exhibit the power running frequency and the regenerative operation frequency for each time zone in a certain period on the basis of the operating information given from an operation control part 7a to perform the operation control of the motor through the inverter and an operating mode changeover means 32 which puts the operating mode of the accumulating device into the charge priority mode in the time zone where the regenerative operation frequency in a certain period is high and puts the operating mode into the discharge priority mode in the time zone where the regenerative operation has a higher frequency. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an elevator control device that converts alternating current into direct current with a rectifier, further converts this direct current into alternating current with an inverter, and supplies the elevator car to a motor that moves up and down.

  Generally, in an elevator control device, a three-phase alternating current supplied from an external commercial alternating current power source is once converted into direct current with a rectifier, and further converted into alternating current with an inverter to convert the direct current into an elevator car. I am trying to supply. In order to reduce the burden on the motor, a counterweight is provided to the car via a sheave. Furthermore, a power storage device that stores regenerative power generated by providing a counterweight is provided, and the power stored in this power storage device is supplied to the motor during powering operation of the motor, and the peak value of power supplied from the outside is obtained. The power consumption is reduced and the required power capacity of the elevator control device is reduced (see Patent Document 1).

FIG. 9 is a schematic configuration diagram of an elevator control device in which the above-described power storage device is incorporated.
The three-phase AC supplied from the external power source 1 which is a three-phase commercial AC power source is full-wave rectified by the rectifier 2 formed of a diode bridge circuit, and the ripple is absorbed by the smoothing capacitor 3 and supplied to the inverter 4. This inverter 4 has a configuration in which a parallel circuit of a switching element 5 and a diode 6 is bridge-connected, and is smoothed by a smoothing capacitor 3 based on a gate signal for each switching element 5 from the operation control unit 7. The direct current is converted into a three-phase alternating current and supplied to the motor 8. The motor 8 controls the rotation of the main sheave 9. A rope 13 having a car 10 and a counterweight 12 attached to both ends is hung on the main sheave 9 and the sub sheave 11.

  Therefore, the operation control unit 7 controls the operation of the motor 8 via the inverter 4 in accordance with the car call operation of the elevator passenger, and moves the car 10 up and down to the destination floor.

  In the relationship between the weight of the car 10 in the state where the passenger is on and the weight of the counterweight 12, the period in which the motor 8 is in the power running state and the heavy side is descending while the heavy side is rising. The motor 8 operates as a generator and enters a regenerative operation state. The weight of the counterweight 12 is, for example, a weight corresponding to the weight of the car 10 in a state where about half of the passengers are on board.

  During the power running period of the motor 8, the inverter 4 converts the direct current rectified by the rectifier 2 into alternating current and supplies the alternating current to the motor 8. On the other hand, during the regenerative operation period of the motor 8, the regenerative power of the motor 8 is converted to direct current by the bridge circuit of the diode 6 of the inverter 4, output to the rectifier 2 side, and stored in the smoothing capacitor 3. A series circuit of a resistor 14 and a switching element 15 is connected to the end of the inverter 4 on the rectifier 2 side. A voltmeter 16 is connected to both ends of the smoothing capacitor 3.

In regenerative operation period of the motor 8, due to the regenerative power supplied from the inverter 4, since the terminal voltage Vc of the smoothing capacitor 3 is increased, considerably higher values for this capacitor voltage Vc and the reference voltage V _R When the set energy release voltage V _HS is exceeded, the energy release control unit 17 is activated to close each switching element 15 for the purpose of protecting each circuit element from a high voltage, and the regenerative power stored in the smoothing capacitor 3 is closed. (Energy) is consumed by the resistor 14. The reference voltage V _R is a voltage when the motor 8 is stopped.

  Furthermore, a charge / discharge circuit 19 is connected to the rectifier 2 side end of the inverter 4 to store the regenerative power supplied from the inverter 4 in the battery 18 and supply the stored power to the motor 8 via the inverter 4. Yes. In addition, a charge / discharge control unit 20 that controls the operation of the charge / discharge circuit 19 is provided.

Next, operations of the charge / discharge circuit 19 and the charge / discharge control unit 20 will be described.
During the regenerative operation period of the motor 8, the terminal voltage (capacitor voltage) Vc of the smoothing capacitor 3 rises due to the regenerative power supplied from the inverter 4, and the capacitor voltage Vc is higher than the reference voltage V _{R and} has energy. When the upper voltage value V _H set to a value lower than the discharge voltage V _HS is exceeded, the charge / discharge control unit 20 turns on the switching element 21 of the charge / discharge circuit 19. Then, the regenerative power supplied from the inverter 4 is accumulated in the battery 18 via the charging reactor 22. A backflow preventing diode 23 is connected to both ends of the charging reactor 22.

During the power running period of the motor 8, DC power output from the rectifier 2 is supplied to the inverter 4, but due to the load of the inverter 4, the rectifier 2 side voltage of the inverter 4, that is, the terminal voltage of the smoothing capacitor 3. (Capacitor voltage) Vc temporarily falls below the reference voltage V _R. When the capacitor voltage Vc falls below the lower voltage value V _L set to a value lower than the reference voltage V _R , the charge / discharge control unit 20 turns on the switching element 24 of the charge / discharge circuit 19. Then, a closed circuit of the battery 18, the discharge reactor 25, and the switching element 24 is formed, and a discharge current flows through this closed circuit. Therefore, when the switching element 24 is turned off, the electric power (energy) stored in the discharge reactor 25 is supplied to the rectifier 2 side terminal of the inverter 4 via the diode 26. Thus, by repeatedly turning on and off the switching element 24, the electric power stored in the battery 18 can be supplied to the motor 8 via the inverter 4.

Thus, by providing the battery 18, the charging / discharging circuit 19, and the charging / discharging control unit 20 in the elevator control device, the peak value of the power supplied from the outside is reduced, and the power consumption is reduced. The required power capacity of the elevator control device can be reduced.
Japanese Patent Laid-Open No. 10-236743

However, the elevator controller shown in FIG. 9 still has the following problems that should be improved.
That is, the conditions for starting the accumulation of regenerative power in the battery 18 in the charge / discharge circuit 19 and the conditions for starting the discharge of the power accumulated in the battery 18 to the motor 8 via the inverter 4 are fixed values. However, the operation status of the elevator differs depending on, for example, each time zone of 24 hours per day. For example, in an office building, the power running frequency is extremely high in the morning working hours, and the regenerative driving frequency is sufficient in other times.

  Since the power running frequency is extremely high in the morning work hours, if the power storage 18 does not store enough power, the power stored in the power storage 18 is consumed in a short time, and most of the remaining power is consumed. Electric power is supplied from the external power source 1.

  On the other hand, in a time zone where the frequency of regenerative operation is relatively high, such as at night, the power stored in the battery 18 is satisfied if the certain discharge condition described above is satisfied, even though the battery 18 has sufficient power storage capacity. Was discharged to the motor 9 via the inverter 4.

  As a result, in the elevator control device, a large amount of power consumption is generated only in a specific time zone such as a morning attendance time zone, so the required power capacity of the elevator control device cannot be sufficiently reduced. As a result, the elevator control apparatus is increased in size and the manufacturing cost is increased.

  The present invention has been made in view of such circumstances, and by learning the operation status of the elevator, the regenerative power can be used effectively when necessary, and the power consumption supplied from the outside is made uniform. An object of the present invention is to provide an elevator control apparatus that can sufficiently reduce the required power capacity of the apparatus, reduce the size of the apparatus, and reduce manufacturing costs.

In order to solve the above problems, in the present invention, a rectifier that converts alternating current from an external power source into direct current, and a power running operation of a motor that moves up and down the elevator car, direct current is converted into alternating current and supplied to the motor. An inverter that converts the motor's regenerative power to direct current during motor regenerative operation and outputs it to the rectifier side, regenerative power output from the inverter during motor regenerative operation, and inverter that stores the accumulated power during power running operation of the motor An elevator control device comprising a power storage device that supplies the motor via a motor and an operation control unit that performs operation control of the motor,
Driving performance learning means for creating power running regenerative learning information indicating power running frequency and regenerative driving frequency in each time period within a certain period based on driving information from the operation control unit via an inverter, and regenerative driving within a certain period Operation mode switching means is provided that sets the operation mode of the power storage device to the charge priority mode during a high-frequency time zone, and sets the operation mode to a discharge priority mode during a high-power operation frequency zone.

  In the elevator control device configured as described above, the power running regeneration learning information indicating the power running frequency and the regenerative driving frequency in each time zone within a certain period is learned. And in the time zone with high regenerative operation frequency, since the power storage device is operated in the charge priority mode, the amount of storage of the power storage device increases. A large amount of accumulated electric power stored in the power storage device operated in the charge priority mode is effectively discharged in the discharge priority mode in a time zone where the power running frequency is high and supplied to the motor via the inverter.

  Thus, by dividing the operation mode of the power storage device into the charge priority mode and the discharge priority mode, the regenerative power can be used effectively when necessary, and the power consumption supplied from the outside can be made uniform. .

  According to another invention, in the above-described elevator control device, power running regeneration learning information indicating the power running frequency and the regenerative driving frequency in each time zone within a certain period is created based on the driving information from the driving control unit via the inverter. Driving performance learning means for generating, accumulated amount learning learning means for creating accumulated amount learning information indicating the accumulated amount of power of the power storage device in each time zone within a certain period, and the regenerative operation frequency within a certain period being high and preceding An operation in which the operation mode of the power storage device is set to the charge priority mode in the time zone when the accumulation amount in the time zone is low, and the operation mode is set to the discharge priority mode in the time zone where the power accumulation operation frequency is high and the accumulation amount in the preceding time zone is high. Mode switching means.

  In the elevator control device configured as described above, the power running regeneration learning information indicating the power running frequency and the regenerative driving frequency in each time zone is created, and the storage amount indicating the power storage amount of the power storage device in each time zone Learning information is created. And since it is in the charge priority mode in the time zone where the regenerative operation frequency is high and the accumulated amount of the preceding time zone is low, and the discharge priority mode is in the time zone where the power running frequency is high and the accumulated amount of the preceding time zone is high, The regenerative power is efficiently stored by the power storage device, and the power stored in the power storage device is discharged more efficiently and supplied to the motor via the inverter.

  In another aspect of the present invention, the operation result learning means in the elevator control device described above is based on the weight of the counterweight, the operation direction of the motor supplied from the operation control unit, and the load weight of the car. Determine the operating state.

  As described above, in the relationship between the weight of the car on which the passenger is on board and the weight of the counterweight, the motor is in a power running state during the period when the heavy side is rising and the heavy side is lowered. During this period, the motor operates as a generator and enters a regenerative operation state. Therefore, it is possible to determine the power running operation state and the regenerative operation state of the motor based on the weight of the counterweight, the operation direction of the motor supplied from the operation control unit, and the load weight of the car.

  Further, according to another invention, the power storage device in the elevator control device described above accumulates regenerative power when the voltage on the rectifier side of the inverter exceeds the upper voltage value, and when the voltage on the rectifier side of the inverter falls below the lower voltage value. The accumulated electric power is supplied to the motor through the inverter. The operation mode switching means sets the upper voltage value and the lower voltage value when the charge priority mode is set lower than the upper voltage value and the lower voltage value when the discharge priority mode is set.

  In the elevator control device configured as described above, the power running regenerative learning information indicating the power running frequency and the regenerative driving frequency in each time zone is created, and the time zone where the power running frequency is high, the time zone where the regenerative driving frequency is high, Thus, the operation mode is switched between the discharge priority mode and the charge priority mode.

  Therefore, regenerative power can be used effectively when necessary, the power consumption supplied from the outside can be made uniform, the required power capacity of the device can be sufficiently reduced, and the life of the battery can be extended. Can be planned.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic configuration diagram of an elevator control apparatus according to an embodiment of the present invention. The same parts as those of the conventional elevator control apparatus shown in FIG. 9 are denoted by the same reference numerals, and detailed description of the overlapping parts is omitted.

  In the elevator control device of this embodiment, the three-phase alternating current supplied from the external power source 1 is full-wave rectified by the rectifier 2, the ripple is absorbed by the smoothing capacitor 3, and supplied to the inverter 4. The inverter 4 converts the direct current smoothed by the smoothing capacitor 3 into a three-phase alternating current based on a gate signal for each switching element 5 from the operation control unit 7 a and supplies the three-phase alternating current to the motor 8. The motor 8 controls the rotation of the main sheave 9. A rope 13 having a car 10 and a counterweight 12 attached to both ends is hung on the main sheave 9 and the sub sheave 11. The car 10 is provided with a weigh scale 30 that measures the weight of the car in which a passenger is on board, and the measured car weight is transmitted to the operation control unit 7a.

  The operation control unit 7a controls the operation of the motor 8 via the inverter 4 in accordance with the car call operation of the elevator passenger, and moves the car 10 up and down to the destination floor. Further, the operation control unit 7a uses the operation direction of the motor 8 (the vertical movement direction of the car) generated in response to the car call operation, the car weight at that time, and the time read from the clock circuit 31 as the operation state to perform a learning calculation. It transmits to the part 32.

  Connected to the rectifier 2 side end of the inverter 4 is a charge / discharge circuit 19 a that stores the regenerative power supplied from the inverter 4 in the battery 18 and supplies the stored power to the inverter 4. The charging / discharging circuit 19a is a circuit for switching charging / discharging with respect to the battery 18. The charging / discharging circuit 19a is connected to a charging switching element 51 and a discharging switching element 52 which are connected in parallel between power supply lines to the inverter 4, and a common connection portion between the switching elements 51 and 52, and is connected to a DC power. It is comprised from the direct current | flow reactor 53 etc. which have the function which smoothes.

  Further, a charge / discharge control unit 20a for controlling the operation of the charge / discharge circuit 19a is provided. The charging current and discharging current for the battery 18 are detected by the current detection circuit 33 and transmitted to the learning calculation unit 32. The terminal voltage of the battery 18 is detected by the voltage detection circuit 34 and transmitted to the learning calculation unit 32.

  As shown in FIG. 2, the learning calculation unit 32 formed of a computer includes a driving state input unit 35, a power running regeneration determination unit 36, a power running regeneration learning table update unit 37, a power running regeneration learning table 38, and an operation mode table creation update unit. 39, a voltage / current input unit 40, a current accumulation amount calculation unit 41, an accumulation amount learning table update unit 42, an accumulation amount learning table 43, an operation mode table 44, an operation mode designation unit 45, and a clock circuit 46 are provided.

  In the power regeneration regeneration learning table 38, as shown in FIG. 3, learning results of the number of power running operations 38a and the number of regeneration operations 38b of the motor 8 in each time zone for 24 hours a day are stored. . In FIG. 3, the power running number 38a and the regenerative number 38b are displayed in a bar graph for easy understanding, but are actually stored in a table format.

  In the accumulated amount learning table 43, as shown in FIG. 4, a learning result of the accumulated amount of electric power (regenerative electric power) accumulated in the battery 18 in each time zone every hour for 24 hours a day is stored. ing. In FIG. 4, the accumulated amount is displayed in a graph for easy understanding, but is actually stored in a table format.

  In the operation mode table 44, as shown in FIG. 5, the operation mode in each time slot | zone for every hour in 24 hours a day is set. In this embodiment, the “discharge priority mode” is set in the time zone including the morning work hours from 6:00 am to 10:00 am, and the “charge priority mode” is set in the other time zones. In FIG. 5, the operation mode is displayed in a graph for easy understanding, but is actually stored in a table format.

  Next, the operation of each unit shown in FIG. 2 of the learning calculation unit 32 will be described in order. The operation state input unit 35 takes in the operation state consisting of the operation direction of the motor 8 (the vertical movement direction of the car 10), the car weight, and the time sequentially input from the operation control unit 7a, and sends them to the power running regeneration determination unit 36. To do. The power running regeneration determination unit 36 uses the result of comparing the car weight and the stored weight of the counterweight 12 and the vertical movement direction of the car 10 to determine whether the motor 8 is in the power running operation state or regenerate based on the algorithm described above. It determines whether it is a driving | running state, and sends a determination result to the power regeneration learning table update part 37 with time.

  The power running regeneration learning table updating unit 37 corrects the values of the power running number of times 38a and the number of regenerative operations 38b in the time zone to which the corresponding time belongs in the power running regeneration learning table 38 using the determination result. Specifically, the values of the power running number 38a and the regenerative operation number 38b in each time zone stored in the power running regeneration learning table 38 are average values for a plurality of days. Change to the average of many days.

  The voltage / current input unit 40 takes in the charging current and discharging current of the battery 18 detected by the current detection circuit 33 and the terminal voltage of the battery 18 detected by the voltage detection circuit 34, and sends them to the current accumulation amount calculation unit 41. To do. The current accumulation amount calculation unit 41 sets the power obtained by multiplying the terminal voltage by the charge / discharge current as the power charged / discharged in the battery 18 at this time, and the accumulated value from the reference time at which this power can be regarded as the past accumulation amount = 0. Is the accumulated amount at the present time. The accumulated amount is added when charging current, and the accumulated amount is subtracted when discharging current. The current accumulation amount calculation unit 41 sends the accumulation amount at the current time of the battery 18 to the accumulation amount learning table update unit 42 with the current time.

  The accumulated amount learning table updating unit 42 corrects the accumulated amount in the accumulated amount learning table 43 using the accumulated amount that is input in the time period to which the corresponding time belongs. Specifically, since the value of the accumulated amount in each time zone stored in the accumulated amount learning table 43 is an average value for a plurality of days, the average value is finely adjusted to an average value for a larger number of days. change.

  The operation mode table creation update unit 39 creates the operation mode table 44 using the power running number of times 38a and the number of regenerative operations 38b of the power running regeneration learning table 38 and the accumulated amount of the accumulated amount learning table 43, and as necessary. In response, the contents of the created operation mode table 44 are updated. When the operation mode table 44 is first created, as shown in FIGS. 3, 4, and 5, the time during which the number of regenerative operations (frequency) 38b within 24 hours per day is high and the accumulated amount in the preceding time zone is low. In the time zone, the operation mode is set to the charge priority mode, and the operation mode is set to the discharge priority mode in the time zone in which the number of times of power running (frequency) 38a is high and the accumulated amount in the preceding time zone is high.

  About the update of the contents, the power running regeneration number 38a and the regenerative operation number 38b of the power running regeneration learning table 38 and the accumulated amount are used in substantially the same manner as in the case of updating the power running regeneration learning table 38 and the accumulated amount learning table 43. The content of the operation mode table 44 is updated based on the accumulated amount of the learning table 43.

  The operation mode designating unit 45 reads the operation mode at the current time of the clock circuit 46 from the operation mode table 44 and sends it to the charge / discharge control unit 20a. The capacitor voltage Vc is input from the voltmeter 16 to the charge / discharge control unit 20a.

FIG. 6 is a diagram showing the relationship between the upper voltage value and the lower voltage value of the capacitor voltage Vc in each operation mode preset in the charge / discharge control unit 20a. Upper voltage V _H1 of the charging priority mode above the reference voltage V _R is set, the upper voltage V _H2 of the upper discharge priority mode of the upper voltage V _H1 of the charging priority mode is set, further, the discharge priority mode The energy discharge voltage V _HS described above is set above the upper voltage V _H2 . Further, the lower voltage V _L2 of the discharge priority mode is set below the reference voltage V _{R, and} the lower voltage V _L1 of the charge priority mode is set below the lower voltage V _L2 of the discharge priority mode. Yes.

  Next, the overall operation of the charge / discharge control unit 20a will be described with reference to the flowchart of FIG. Each time the minute time Δt elapses (step S1), the current operation mode is read (S2), and then the capacitor voltage Vc is read (S3). Depending on the range of the capacitor voltage Vc, the switching elements 51 and 52 of the charging / discharging circuit 19a are controlled to be turned on and off to store the regenerative power in the battery 18 or the inverter 4 of the power stored in the battery 18. Then, supply to the motor 8 is performed (S4).

  FIG. 8 is a diagram showing the relationship between the time change characteristic of the required power consumption during the power running operation of the motor 8 and the portion of the power supplied from the battery 18 in the required power consumption. In the figure, the shaded portion is the power portion supplied from the battery 18. Thus, the power supplied from the external power source 1 during the power running operation of the motor 8 can be saved.

Further, a specific control operation for the charge / discharge circuit 19a of the charge / discharge control unit 20a will be described. First, in the state where the operation mode is set to the charge priority mode, the terminal voltage (capacitor voltage) Vc of the smoothing capacitor 3 rises during the regenerative operation period of the motor 8 due to the regenerative power supplied from the inverter 4. When the capacitor voltage Vc exceeds the upper voltage value V _H1 set to a value lower than the energy release voltage V _HS , the charging switching element 51 of the charge / discharge circuit 19a is turned on. Then, the regenerative power supplied from the inverter 4 is accumulated in the battery 18 via the DC reactor 53.

During the power running period of the motor 8, DC power output from the rectifier 2 is supplied to the inverter 4, but due to the load of the inverter 4, the rectifier 2 side voltage of the inverter 4, that is, the terminal voltage of the smoothing capacitor 3 ( capacitor voltage) Vc is temporarily lower than the reference voltage V _R. When the capacitor voltage Vc falls below the lower voltage value V _L1 lower than the reference voltage V _{R, when} the discharging switching element 52 of the charging / discharging circuit 19a is turned on, the electric power accumulated in the capacitor 18 is passed through the inverter 4 to the motor. 8 is supplied.

Next, in a state where the operation mode is set to the discharge priority mode, the capacitor voltage Vc of the smoothing capacitor 3 increases, and the capacitor voltage Vc is set to a value lower than the energy discharge voltage _{VHS. When H2} is exceeded, the charging switching element 51 of the charge / discharge circuit 19a is turned on. Then, the regenerative power supplied from the inverter 4 is accumulated in the battery 18 via the DC reactor 53. On the contrary, when the capacitor voltage Vc falls below the lower voltage value V _L2 lower than the reference voltage V _{R, when} the discharge switching element 52 of the charge / discharge circuit 19a is turned on, the electric power accumulated in the capacitor 18 is passed through the inverter 4. , Supplied to the motor 8.

  Here, when the charge priority mode is compared with the discharge priority mode, the charge (priority) mode starts accumulation (charge) at a lower upper voltage and the supply (discharge) starts at a lower lower voltage than in the discharge priority mode. Therefore, the regenerative power is sufficiently accumulated in the battery 18 during the charge priority mode period.

  On the other hand, in the discharge priority mode, since accumulation (charging) starts at a higher upper voltage and supply (discharge) starts at a higher lower voltage than in the charging priority mode, accumulation in the capacitor 18 is performed in the discharge priority mode period. Electric power is effectively supplied to the motor 8 via the inverter 4.

  In the elevator control device configured as described above, for example, a power running regeneration learning table 38 indicating the number of times of power running (frequency) 38a and the number of times of regenerative operation (frequency) 38b in each time zone such as one hour of 24 hours a day is created. Is done. Further, an accumulated amount learning table 43 indicating the accumulated amount of electric power of the battery 18 in each time zone is created.

  Then, for example, in a time zone where the regenerative operation frequency is high and the accumulated amount of the preceding time zone is low, such as a time zone other than the morning work time zone of an office building or the like, the charging priority mode is set, and the next attendance to the battery 18 is made. Sufficient power is stored in preparation for the time zone. Furthermore, in the time zone where the power running frequency is high and the accumulated amount of the preceding time zone is high, such as in the morning work hours of office buildings, etc., the discharge priority mode is set, and the battery 18 is sufficiently accumulated in the previous charge priority mode. Electric power is efficiently supplied to the motor 8.

  In this way, the regenerative power is efficiently stored by the battery 18, and when the regenerative power is required, the power stored in the battery 18 is discharged more efficiently and supplied to the motor 8 via the inverter 4. . As a result, the power consumption supplied from the external power source 1 can be made uniform, the required power capacity of the elevator control device can be sufficiently reduced, the elevator control device can be downsized, and the manufacturing cost can be reduced.

  In the above-described embodiment, an elevator control apparatus for an elevator installed in a normal office building has been described as an example. Therefore, the elevator driving information on Saturdays and Sundays was excluded from learning.

  In addition, this invention is not limited to embodiment mentioned above. The operation mode may be created only by the contents of the power running regeneration learning table 38. That is, the operation mode is set to the charge priority mode in the time zone where the regenerative operation frequency is high within 24 hours a day, and the operation mode is set to the discharge priority mode in the time zone where the power running frequency is high.

The figure which shows schematic structure of the elevator control apparatus concerning one Embodiment of this invention. The block block diagram of the learning calculating part incorporated in the elevator control apparatus of the embodiment The figure which shows the memory content of the power running regeneration learning table formed in the learning calculating part of the elevator control apparatus The figure which shows the memory content of the accumulation amount learning table formed in the learning calculating part of the elevator control apparatus The figure which shows the memory content of the operation mode table formed in the learning calculating part of the elevator control apparatus The figure which shows the relationship between the upper side voltage value and lower side voltage value in the capacitor voltage at the time of each operation mode set to the discharge control part of the same elevator control apparatus Flow chart showing the overall operation of the discharge control unit of the elevator control device The figure which shows the time change characteristic of the required power consumption at the time of the power running operation of the motor of the elevator control apparatus The figure which shows schematic structure of the conventional elevator control apparatus.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... External power supply, 2 ... Rectifier, 3 ... Smoothing capacitor, 4 ... Inverter, 7, 7a ... Operation control part, 8 ... Motor, 9 ... Main sheave, 10 ... Car, 11 ... Sub sheave, 12 ... Counterweight, 14 DESCRIPTION OF REFERENCE SYMBOLS 15, 22, 24 ... SWITCHING ELEMENT, 16 ... VOLTAGE, 17 ... ENERGY RELEASE CONTROL UNIT, 18 ... CAPACITOR, 19, 19A ... CHARGE / DISCHARGE CIRCUIT, 20, 20a ... Reference numerals 31, 46: clock circuit, 32: learning calculation unit, 33: current detection unit, 34: voltage detection unit, 35: operation state input unit, 36: power running regeneration determination unit, 37 ... power running regeneration learning table update unit, 38 ... Power regeneration regeneration learning table, 39... Operation mode table creation update unit, 40... Voltage / current input unit, 41... Current accumulation amount calculation unit, 42... Accumulation amount learning table update unit, 43. Buru, 45 ... operation mode designating unit, 51 ... charge switching element, 52 ... discharge switching element

Claims (4)

A rectifier that converts alternating current from an external power source into direct current, and a power running operation of a motor that moves an elevator car up and down converts the direct current to alternating current and supplies it to the motor. During regenerative operation of the motor, the regenerative power of the motor An inverter that converts DC to DC and outputs it to the rectifier side, regenerative power output from the inverter during regenerative operation of the motor, and accumulated power during power running operation of the motor via the inverter An elevator control device comprising: a power storage device that supplies power to the motor; and an operation control unit that performs operation control of the motor,
Driving performance learning means for creating power running regeneration learning information indicating the power running frequency and the regenerative operation frequency of each time period within a certain period based on the operation information from the operation control unit via the inverter;
An operation mode switching means for setting the operation mode of the power storage device to the charge priority mode in a time zone where the regenerative operation frequency is high within the predetermined period and setting the operation mode to the discharge priority mode in a time zone where the power running frequency is high. An elevator control device comprising: A rectifier that converts alternating current from an external power source into direct current and a power running operation of a motor that moves up and down an elevator car converts the direct current to alternating current and supplies it to the motor. During regenerative operation of the motor, the regenerative power of the motor An inverter that converts DC to DC and outputs it to the rectifier side, regenerative power output from the inverter during regenerative operation of the motor, and accumulated power during power running operation of the motor via the inverter An elevator control device comprising: a power storage device that supplies power to the motor; and an operation control unit that performs operation control of the motor,
Driving performance learning means for creating power running regeneration learning information indicating the power running frequency and the regenerative operation frequency of each time period within a certain period based on the operation information from the operation control unit via the inverter;
Accumulated amount result learning means for creating accumulated amount learning information indicating the accumulated amount of electric power of the power storage device in each time period within a fixed period;
In a time zone in which the regenerative operation frequency is high and the accumulated amount in the preceding time zone is low within the predetermined period, the operation mode of the power storage device is set to the charge priority mode, and the accumulated amount in the preceding time zone is high in power running frequency. An elevator control device comprising: an operation mode switching means for setting the operation mode to a discharge priority mode in a high time zone.   The operation performance learning means determines a power running operation state and a regenerative operation state of the motor based on a weight of a counterweight, an operation direction of the motor supplied from the operation control unit, and a loaded weight of the car. The elevator control device according to claim 1 or 2, characterized by the above. The power storage device stores the regenerative power when the voltage on the rectifier side of the inverter exceeds the upper voltage value, and stores the stored power via the inverter when the voltage on the rectifier side of the inverter falls below the lower voltage value. To the motor,
The operation mode switching means sets the upper voltage value and lower voltage value when the charge priority mode is set lower than the upper voltage value and lower voltage value when the discharge priority mode is set. Item 4. The elevator control device according to any one of Items 1 to 3.

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