JP2005145687A - Elevator controller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an elevator controller which can detect occurrence of a power failure and shift an elevator from normal operation mode to operation mode at a power failure time, regardless of transmission time of a power failure signal from a power failure detecting device, in occurrence of the power failure, when a charging/discharging means is installed in a control panel different from a control panel of an elevator. <P>SOLUTION: The elevator controller comprises a converter, an inverter, a car travelling up and down in an elevator shaft, direct current buses disposed between the converter and inverter, and the charging/discharging means installed in the control panel different from the control panel having the direct current buses. The charging/discharging means comprises an electric power accumulator which is disposed between the direct current buses, accumulates electric power in a regeneration operation of the elevator, and supplies the electric power to the direct current buses in a powering operation, and a charging/discharging controller that controls the charging/discharging of the electric power accumulator to the direct current buses and has a bus voltage detector for detecting voltage of the direct current buses and a power failure determining means for determining presence or absence of the power failure based on the voltage of the direct current buses. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an elevator control device related to automatic operation during a power failure.

  A conventional elevator control device includes a converter that rectifies AC power from an AC power source and converts it into DC power, and an inverter that drives the motor by converting DC power from the converter into AC power having a variable voltage and variable frequency. A power storage device provided between the DC buses that stores DC power from the DC bus during regenerative operation of the elevator and supplies the DC power stored during powering operation to the DC bus, and charging and discharging of the power storage device A charge / discharge control device for controlling, a power failure detection means for detecting a power failure, a current detection means and a voltage detection means for detecting an output current and an output voltage of the inverter, respectively, a car load measurement means for measuring an elevator car load, The elevator has speed detection means for detecting the operation speed of the elevator, and a table in which necessary power corresponding to the speed and the car load is set. Speed control means for controlling the inverter to control the speed based on the speed command and the detection value by the speed detection means, and when the power failure is detected by the power failure detection means, the detected current value of the current detection means and the detected voltage value of the voltage detection means The required power calculated from the table based on the output power of the inverter calculated based on the car load, the car load measurement value measured by the car load measuring means and the detection speed by the speed detecting means, and the dischargeable power of the power storage device There is a technique for obtaining a speed command for speed control within the range of dischargeable power based on the comparison with (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 2001-240336

  In the elevator control device described in Patent Document 1, even when a power failure occurs during elevator operation, the power failure is detected by the power failure detection means in the elevator control panel, and the speed is controlled within the range of the dischargeable power from the power storage device. Thus, it becomes possible to operate the elevator stably by changing the speed and acceleration. However, when the power storage device is installed later in an elevator device that is not equipped with a power storage device for energy saving measures or power failure measures, the power storage device and the control panel may be installed in different places. For this reason, when a power failure occurs, the power failure information transmission time from the power failure detection device to the power storage device may be required more than the time when the DC bus voltage rapidly decreases. For this reason, when the capacity | capacitance of the smoothing capacitor inserted between direct-current buses is not enough, the fall of the torque which generate | occur | produces with a winding machine generate | occur | produced, and the operation | movement of the elevator may become unstable. In particular, when the control panel and the power storage device are installed at relatively remote locations, and inexpensive serial transmission is used as a means of transmitting power outage information, the power outage information from the power outage detection device is used when a power outage occurs. As a result, there is a problem that the transmission time is delayed and the DC bus voltage is suddenly lowered, resulting in unstable operation of the elevator or the need to temporarily stop the elevator.

  The present invention has been made to solve the above-described problems. The purpose of the present invention is to detect a power outage when a power outage occurs when the charging / discharging means is installed in a control panel different from the control panel of the elevator. It is an object of the present invention to provide an elevator control device capable of detecting the occurrence of a power failure and shifting the elevator from a normal operation mode to a power failure operation mode regardless of the transmission time of the power failure signal from the device.

  The elevator control device according to the present invention rectifies AC power from an AC power source and converts it into DC power, and converts the DC power from this converter into AC power of variable voltage and variable frequency to drive the drive device. A DC bus provided between the converter and the inverter, and charging / discharging means provided on a control panel different from the control panel provided with the DC bus A power storage device that is provided between the DC buses, stores DC power from the DC buses during the regenerative operation of the elevator, and supplies the DC power stored during powering operation to the DC buses; By controlling the charging / discharging of the power storage device with respect to the DC bus, the bus voltage detecting device for detecting the voltage of the DC bus and the bus voltage detecting device It is obtained by a charge and discharge control device having a power failure detection means for determining the presence or absence of a power failure on the basis of the detected voltage of the DC bus.

  The present invention relates to a converter that rectifies AC power from an AC power supply and converts it into DC power, an inverter that converts DC power from the converter into AC power of variable voltage and variable frequency, and drives a drive device, and a drive device A DC bus provided between the converter and the inverter, and charging / discharging means provided on a control panel different from the control panel provided with the DC bus. The discharging means is provided between the DC buses, stores a DC power from the DC buses during the regenerative operation of the elevator, and supplies a DC power stored in the power running operation to the DC bus, and stores power for the DC buses. A bus voltage detecting device for controlling charging / discharging of the device and detecting a voltage of the DC bus, and an electric power of the DC bus detected by the bus voltage detecting device. Power outage occurs when the control panel of the elevator and the charging / discharging means are installed in different control panels. Sometimes, regardless of the power failure signal transmission time from the power failure detection device, it is possible to detect the occurrence of a power failure and shift the elevator from the normal operation mode to the power failure operation mode.

  FIG. 1 is a block diagram showing a configuration of an elevator control apparatus according to the present invention. In the figure, AC power output from a commercial power source 1 for driving such as a three-phase AC power source is rectified by a converter 2 and converted into DC power, and is provided between the converter 2 and an inverter 4 described later. Supplied to the DC bus 3. The DC power supplied from the DC bus 3 is converted into AC power having a desired variable voltage and variable frequency by the inverter 4 and supplied to the drive device 5 installed in the elevator machine room or the like above the hoistway. The driving sheave of the driving device 5 is connected with a car 8 provided with a car load measuring device for detecting a load on the car room at one end and a counterweight 9 at the other end. The main rope 22 is wound around, and the car 8 and the counterweight 9 are suspended in a fishing bottle type by the main rope 22. When AC power from the inverter 4 is supplied to the drive device 5, the car sheave and the counterweight 9 are reversely moved in the elevator hoistway by rotating the drive sheave on which the main rope 22 is wound. The car 8 is landed at a desired position under the control of the control device 21 that controls the speed and position of the elevator. The power failure / recovery detector 18 detects the power failure and power recovery of the commercial power source 1 and has both functions of the power failure detection device and the power recovery detection device. The above configuration excluding the commercial power source 1 is provided in the control panel 23 installed in the elevator machine room and the elevator hoistway. The car control power supply device 14 and the hall control power supply device 15 are connected to the control panel 23 and are supplied with electric power from the commercial power supply 1. The elevator electric device 17 is connected to the commercial power supply 16 for illumination via the control panel 23. Power is being supplied from. Moreover, the charging / discharging means 24 installed in a place different from the control panel 23 (for example, a control panel different from the control panel 23) is provided between the DC buses 3, and is a lead storage battery such as a secondary battery or nickel hydride. From a power storage device 10 composed of a storage battery, a charge / discharge device 11 provided in the power storage device 10 and a charge / discharge control device 12 that performs charge / discharge control of the power storage device 10 and detects the voltage of the DC bus 3 It is configured. In addition, serial transmission is used as the transmission means 25 from the power failure / recovery detector 18 provided in the control panel 23 to the charge / discharge control device 12 of the charge / discharge means 24.

  Secondary batteries such as lead storage batteries and nickel metal hydride storage batteries used in the power storage device 10 of the charge / discharge means 24 have been increased in output, but in order to make the charge / discharge means 24 compact and inexpensive, The number of secondary batteries is held down. For this reason, the output voltage of the power storage device 10 is lower than the voltage of the DC bus 3. Since the voltage of the DC bus 3 is basically controlled in the vicinity of the voltage obtained by rectifying the commercial power supply 1 by the converter 2, the DC bus 3 side output of the charge / discharge device 11 is used as the DC bus when the power storage device 10 is discharged. It is necessary to increase the voltage to 3. In addition, when the power storage device 10 is charged, the DC bus 3 side input of the charging / discharging device 11 needs to drop below the output voltage of the converter 2. Since such control is required, a DC-DC converter is mainly employed for the charge / discharge device 11, and the discharge gate and the charge gate of the DC-DC converter are controlled by the charge / discharge control device 12.

  Further, the counterweight 9 suspended by the main rope 22 wound around the driving sheave of the driving device 5 is set so that its weight is substantially equal in a state where half the passengers get on the car 8. Has been. Therefore, the driving state of the driving device 5 varies depending on the passenger ratio of the passengers in the car 8 and the driving direction of the car 8. That is, when the weight of the car 8 including the passenger is lighter than the weight of the counterweight 9 (for example, in a no-load state where no passenger is in the car 8), the speed energy is converted into electric power when the car 8 is raised. Regenerative operation to convert to, and power running operation that consumes power when descending. On the other hand, when the weight of the car 8 including passengers is heavier than the weight of the counterweight 9 (for example, in a rated load state in which a rated load is applied when passengers get in the car 8), Power running operation is performed during the ascending operation of 8, and regenerative operation is performed during the descending operation.

  In the elevator apparatus configured as described above, the voltage of the DC bus 3 is increased by the regenerative power from the drive device 5 during the regenerative operation in which the speed energy is converted into electric power. When the voltage of the DC bus 3 becomes higher than the output voltage from the converter 2, the reverse voltage acts on the rectifying element in the converter 2, and the power supply from the commercial power supply 1 is stopped. Thereafter, when the voltage of the DC bus 3 further increases and reaches a predetermined specified voltage, this power is stored in the power storage device 10 under the control of the charge / discharge control device 12. Further, when the power storage device 10 is not installed or when all of the regenerative power from the drive device 5 cannot be stored in the power storage device 10, the regenerative power from the drive device 5 causes the DC bus 3 to When the voltage rises and reaches a predetermined value, power is supplied to the regenerative resistor 6 by the regenerative resistor control circuit 7 provided between the DC buses 3, and the regenerative power is converted into heat energy and consumed in the regenerative resistor 6. The

  On the other hand, at the time of powering operation in which electric power is consumed during the operation of the elevator, the drive device 5 is started and discharge is started from the power storage device 10 so that the voltage of the DC bus 3 is controlled to a predetermined specified voltage. . At this time, when the electric power necessary for the drive device 5 to raise and lower the car 8 is insufficient only by the electric power discharged from the electric power storage device 10, the electric power of the commercial power source 1 output from the converter 2 is also used. Thus, the voltage of the DC bus 3 is controlled to be a predetermined specified voltage. Thus, by using the power stored in the power storage device 10 during the regenerative operation during the power running operation, by reducing the proportion of the power supplied from the commercial power source 1 among the power consumed during the operation of the elevator, Energy conservation measures are being taken.

  When charging / discharging means 24 is used as an energy saving measure, energy is most efficiently reused when the amount of power that can be charged by power storage device 10 is greater than the amount of regenerative power generated during regenerative operation. However, if the capacity of the power storage device 10 is too large, the device becomes large, so that the amount of regenerative power generated during the regenerative operation is equal to the amount of power that can be charged by the power storage device 10. By bringing them closer, the device can be made smaller and less expensive. Further, by making the amount of power charged in the power storage device 10 during regenerative operation and the amount of power discharged from the power storage device 10 during power running operation approximately the same, wasteful charging / discharging of the power storage device 10 is performed. It becomes possible to prevent. However, in the operation of the elevator, energy loss such as heat and friction occurs. Therefore, when the operation is performed under the same conditions, the electric power larger than the regenerative electric power during the regenerative operation is necessary during the power running operation. That is, when the car 8 is in a no-load state, the car 8 that is in the power running operation at the same operation speed and the same operation distance is lowered with the amount of power charged by the power storage device 10 when the car 8 is in the regenerative operation. I can't do it. Therefore, in order to prevent unnecessary charging / discharging of the power storage device 10, when the charge amount during the regenerative operation and the discharge amount during the power running operation are set equal, together with the power supplied from the power storage device 10 It is necessary to use the power of the commercial power source 1 output from the converter 2 to supply the power necessary for the elevator. In particular, when a power running operation that requires the maximum power is performed, such as when the car 8 is raised in the rated load state or when the car 8 is lowered in the no-load state, only the electric power discharged from the power storage device 10 is used. Then, since the electric power required for normal operation cannot be supplied, the electric power supplied from the commercial power source 1 is essential.

Next, a case where a power failure occurs during powering operation will be described. Since the maximum discharge amount (maximum current value) of the power storage device 10 is limited by the charge / discharge control device 12 during normal operation of the commercial power source 1, power of a predetermined value or more is supplied from the power storage device 10 during normal operation. It is never supplied. Therefore, when a power failure occurs, the power supply from the commercial power supply 1 is stopped, and the voltage of the DC bus 3 is rapidly reduced. FIG. 2 is a block diagram showing a control configuration of the charge / discharge control apparatus at the time of power failure in the present invention. In the figure, when the voltage drop of the DC bus 3 is detected by the charge / discharge control device 12 installed at a location different from the control panel 23, the maximum current value at the time of discharge is changed by the charge / discharge control device 12. For this reason, the power supply from the power storage device 10 is increased, and the power storage device 10 shifts to a power failure operation mode that enables only the power storage device 10 to supply power necessary for the operation of the elevator. FIG. 3 is a block diagram showing the configuration of another elevator control device according to the present invention, and shows a case where all the electric power is supplied from the power storage device 10 to the car control power supply device 14 and the elevator electric equipment 17 at the time of a power failure. ing. In the figure, a power conversion device 19 and a switching device 20 are provided. In the event of a power failure, power is supplied from the power storage device 10 to the drive device 5, and power is supplied via the power conversion device 19 and the switching device 20. Power is supplied to the other required parts.
Hereinafter, specific control of the charge / discharge control device 12 during a power failure will be described in detail in each embodiment.

Embodiment 1 FIG.
FIG. 4 is a block diagram showing the configuration of the charge / discharge control apparatus according to Embodiment 1 of the present invention, and FIG. 5 is a flowchart showing the control of the charge / discharge control apparatus during a power failure according to Embodiment 1 of the present invention. The charge / discharge control device 12 includes a bus voltage detection device 12a that detects the voltage of the DC bus 3, and a voltage change amount per unit time (hereinafter referred to as “voltage drop”) when the voltage of the DC bus 3 is detected by the bus voltage detection device 12a. And a power failure determination means 12b for determining the presence or absence of a power failure based on “voltage change amount”). Next, the control of the charge / discharge control device 12 during a power failure will be described with reference to FIG. The voltage of the DC bus 3 provided between the converter 2 and the inverter 4 is the bus voltage detection device of the charge / discharge control device 12 installed at a location away from the control panel 23 provided with the DC bus 3 and the like. 12a (step S401). Here, when a power failure occurs during powering operation that requires the most power in the operation of the elevator (for example, when the car 8 rises when the rated load is applied), the power supply from the commercial power supply 1 suddenly stops. The voltage of the DC bus 3 drops rapidly. At this time, when the voltage change amount of the DC bus 3 is equal to or larger than a predetermined value of the voltage change amount, the power failure determination means 12b of the charge / discharge control device 12 determines that a power failure has occurred (steps S401 → S402). For example, when the voltage change amount of the DC bus 3 due to a power failure is 30 V / 10 msec during powering operation that requires the most power as described above, the set value of the voltage change amount determined to be a power failure is 20 V / 10 msec. By determining, it is possible to detect a power outage. After the power failure is detected, the maximum discharge current value set during the normal operation is changed by the charge / discharge control device 12 so that the power necessary for the elevator operation can be supplied only from the power storage device 10 from the normal operation mode. The mode is changed (step S403).

  According to Embodiment 1 of the present invention, the charging / discharging means 24 is installed at a location away from the control panel 23 by retrofitting the charging / discharging means 24 for energy saving measures, power failure measures, etc., and the charging / discharging means 24 Is provided in a control panel different from the control panel 23, the voltage of the DC bus 3 provided between the converter 2 and the inverter 4 is charged and discharged by a charge / discharge control device installed at a location away from the control panel 23. Since it is detected by the 12 bus voltage detectors 12a, the stop of the commercial power supply 1 due to a power failure can be immediately detected from the voltage change amount. Therefore, even when serial transmission is used as the transmission means 25 between the power failure recovery detector 18 and the charge / discharge means 24, a power failure is detected regardless of the presence or absence of the power failure detection signal from the power failure recovery detector 18. Therefore, it is possible to immediately supply power from the power storage device 10 based on the determination result of the power failure determination means 12b. For this reason, when the power failure occurs, the elevator does not stop temporarily due to the voltage drop of the DC bus 3 or the unstable operation state occurs, and the normal operation mode can be smoothly shifted to the power failure operation mode. In addition, when erroneous detection of the charge / discharge control device 12 occurs due to the influence of noise or the like, the maximum discharge current value during normal operation is changed based on the detection result of power failure, and power supply from the power storage device 10 is performed. However, only the ratio of the electric power supplied from the commercial power source 1 to the electric power supplied from the power storage device 10 among the electric power consumed by the elevator is changed. There is no adverse effect on it.

Embodiment 2. FIG.
FIG. 6 is a block diagram showing the configuration of the charge / discharge control apparatus according to Embodiment 2 of the present invention, and FIG. 7 is a flowchart showing the control of the charge / discharge control apparatus during a power failure according to Embodiment 2 of the present invention. The charge / discharge control device 12 includes a bus voltage detection device 12a that detects the voltage of the DC bus 3 and a set value of the amount of change in power that is determined to be a power failure. Power failure determination value determining means 12c determined on the basis of the power change amount detected by the bus voltage detector 12a and a power failure determination means for determining whether there is a power failure based on the set value determined by the power failure determination value determining means 12c 12b. Next, the control of the charge / discharge control device 12 during a power failure will be described with reference to FIG. First, while the elevator car 8 is stopped, a load acting on the car 8 is detected by the scale 13 installed below the car room of the car 8 (step S501). Next, based on the load of the car 8 detected by the scale 13, a set value of the voltage change amount of the DC bus 3 for determining a power failure is determined by the power failure determination value determining means 12c (step S502). When a power failure occurs, the voltage of the DC bus 3 detected by the charge / discharge control device 12 rapidly decreases. However, the voltage change amount set based on the load of the car 8 in step S502 is lower than the set value. When the voltage change amount of the DC bus 3 detected by the charge / discharge control device 12 is larger, the power failure determination means 12b determines that a power failure has occurred (step S503 → S504), and switches to the power failure operation mode (step S505).

  According to the second embodiment of the present invention, the load of the car 8 is detected by the scale 13 provided below the car 8, and the power failure judgment value determining means 12c generates a power failure based on the detected load of the car 8. Since the amount of voltage change of the DC bus 3 which is a criterion for determination is determined, it is possible to detect a power failure more precisely. Since the electric power required for the driving device 5 varies depending on the load of the elevator car 8, the voltage change amount of the DC bus 3 at the time of the power failure also varies depending on the load of the elevator car 8. That is, the voltage change amount of the DC bus 3 at the time of the power failure is 30 V / 10 msec when the car 8 is lowered in the no-load state and 15 V / 10 msec when the car 8 is lowered in the 25% load state. The greater the difference in weight from the counterweight 9, the greater the amount of voltage change in the DC bus 3 during powering operation. Therefore, the set value of the voltage change amount for determining the power outage by the power outage determining means 12b of the charge / discharge control device 12 is 20V / 10 msec for the above-mentioned no load, and 12.5V / 10 msec for the 25% load. In addition, the power failure can be accurately determined by changing the value according to the detection value of the balance 13. The rest is the same as in the first embodiment.

Embodiment 3 FIG.
FIG. 8 is a flowchart showing the control of the charge / discharge control apparatus at the time of a power failure according to Embodiment 3 of the present invention. The configuration of the charge / discharge control device is the same as that shown in FIG. Based on FIG. 8, control of the charge / discharge control apparatus 12 at the time of a power failure is demonstrated. As in the first and second embodiments, the voltage of the DC bus 3 is detected by the bus voltage detection device 12a of the charge / discharge detection device 12 installed at a location away from the control panel 23, so that a power failure occurs. When the power supply from the commercial power source 1 is stopped, the voltage drop of the DC bus 3 is detected. When the detected voltage change amount becomes larger than the set value determined by the power failure determination value determination means 12c based on the load of the car 8, the power failure determination means 12b determines that a power failure has occurred (steps S601 → S603). Even when the voltage drops due to a power failure, if the amount of voltage change is smaller than the set value, it is not determined that a power failure occurs. For this reason, the maximum current value is not changed by the charge / discharge control device 12, and the power supply state from the power storage device 10 does not change. In such a case, when the voltage of the DC bus 3 detected by the bus voltage detection device 12a is smaller than a predetermined value, the power failure determination means 12b determines that a power failure has occurred (steps S602 → S603). As described above, when it is determined that there is a power failure based on the voltage change amount or voltage value of the DC bus 3, a transition is made to a power failure operation mode in which power necessary for the operation of the elevator can be supplied only from the power storage device 10 (step S 604). ).

  According to the third embodiment of the present invention, the determination of the power failure is made based on the voltage change amount or the voltage value of the DC bus 3, so that it is possible to determine the power failure more precisely. For example, when the load of the car 8 is substantially equal to the weight of the counterweight 9, the power consumption in the drive device 5 during powering operation is small. When a power failure occurs in such a situation, the voltage change amount of the DC bus 3 is small, and it is difficult to determine a power failure based on the voltage change amount of the DC bus 3. However, for example, a power failure occurs when the voltage value of the DC bus 3 drops below a certain reference value, such as when the voltage value of the DC bus 3 of 280 V is reduced to 200 V during a normal operation, as judged as a power failure. By determining that there is a power failure, it is possible to accurately determine a power failure even when the car 8 and the counterweight 9 are balanced. Similarly to the second embodiment, if the power failure determination value determining means 12c is provided and the set value of the voltage change amount determined to be a power failure is determined based on the car load, the power failure is determined more accurately. It becomes possible.

Embodiment 4 FIG.
FIG. 9 is a block diagram showing the configuration of the charge / discharge control apparatus according to Embodiment 4 of the present invention, and FIG. 10 is a flowchart showing the control of the charge / discharge control apparatus at the time of power failure according to Embodiment 4 of the present invention. In the charge / discharge control device 12, the power failure determination determination device 12d is a device that determines a power failure by a power failure signal from the power failure recovery detector 18 when there is a power failure determination signal from the power failure determination means 12b. The configuration is the same as that of the third embodiment. Next, control of the charge / discharge control device 12 during a power failure will be described with reference to FIG. First, as in the third embodiment, a power failure is determined based on the voltage change amount of the DC bus 3 detected by the bus voltage detection device 12a of the charge / discharge control device 12 (step S701). Further, a power outage is determined based on the voltage value of DC bus 3 (step S702). Here, it is determined that there is a possibility of a power failure by the power failure determination means 12b as the voltage change amount is not less than the set value of the voltage change amount for determining the power failure or the voltage value is not more than the voltage value set value for determining the power failure. Then (step S703), the maximum discharge current limit value is changed in order to supply electric power necessary for the operation of the elevator only from the power storage device 10, and the normal operation mode is shifted to the power failure operation mode (step S704). . Thereafter, when a power failure signal from the power failure / recovery detector 18 provided in the control panel 23 is detected within a predetermined time, a power failure is determined by the power failure confirmation determining device 12d (step S705 → S706), and the power failure operation is performed. Persist mode. On the other hand, when the power failure signal from the power failure recovery detector 18 is not detected by the power failure confirmation determination device 12d within a predetermined time, the power failure detected by the voltage change amount or voltage value of the DC bus 3 is false detection. Determination is made (step S707), and the operation returns to the normal operation mode (step S708).

  According to the fourth embodiment of the present invention, as in the third embodiment, since a power failure is detected based on the voltage change amount or voltage value of the DC bus 3, the charging / discharging means 24 is separated from the control panel 23. Even when it is installed in a place, it is possible to detect a power failure without causing the operation of the elevator to become unstable, and smoothly shift from the normal operation mode to the power failure operation mode. Furthermore, after the possibility of the occurrence of a power failure is detected by the voltage of the DC bus 3, the power failure is determined by the presence or absence of the power failure signal of the power failure recovery detector 18 provided in the control panel 23. Even when a delay occurs, it is possible to reliably detect a power failure and shift to a power failure operation mode. Further, even if it is determined that a power failure has occurred based on erroneous detection of the voltage of the DC bus 3 due to noise or the like, the power failure signal from the power failure recovery detector 18 is not received, so that the normal operation mode can be recovered. In addition, waste of power charged in the power storage device 10 can be prevented, and the influence on the life due to excessive discharge from the power storage device 10 can be minimized. It should be noted that the problem of excessive discharge from the power storage device 10 can be avoided by adjusting the voltage change amount of the DC bus 3 determined to be a power failure or the set value of the voltage value. Similarly to the second embodiment, if the power failure determination value determining means 12c is provided and the set value of the voltage change amount determined to be a power failure is determined based on the car load, the power failure is determined more accurately. It becomes possible.

It is a block diagram which shows the structure of the elevator control apparatus in this invention. It is a block diagram which shows the control structure of the charging / discharging control apparatus at the time of the power failure in this invention. It is a block diagram which shows the structure of another elevator control apparatus in this invention. It is a block diagram which shows the structure of the charging / discharging control apparatus in Embodiment 1 of this invention. It is a flowchart which shows control of the charging / discharging control apparatus at the time of the power failure in Embodiment 1 of this invention. It is a block diagram which shows the structure of the charging / discharging control apparatus in Embodiment 2 of this invention. It is a flowchart which shows control of the charging / discharging control apparatus at the time of the power failure in Embodiment 2 of this invention. It is a flowchart which shows control of the charging / discharging control apparatus at the time of the power failure in Embodiment 3 of this invention. It is a block diagram which shows the structure of the charging / discharging control apparatus in Embodiment 4 of this invention. It is a flowchart which shows control of the charging / discharging control apparatus at the time of the power failure in Embodiment 4 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,16 Commercial power supply 2 Converter 3 DC bus 4 Inverter 5 Drive device 6 Regenerative resistor 7 Regenerative resistor control circuit 8 Car 9 Balance weight 10 Power storage device 11 Charging / discharging device 12 Charging / discharging control device 12a Bus voltage detection device 12b Power failure determination means 12c Power failure determination value determination means 12d Power failure determination determination device 13 Scale 14 Car control power supply device 15 Landing control power supply device 17 Elevator electrical equipment 18 Power failure recovery detector 19 Power conversion device 20 Switching device 21 Control device 22 Main rope 23 Control panel 24 Charging / discharging means 25 Transmission means

Claims (5)

  A converter that rectifies AC power from an AC power source and converts it to DC power, an inverter that converts DC power from this converter into AC power of variable voltage and variable frequency, and drives a drive device, and elevator lift by the drive device A DC bus provided between the converter and the inverter, and charging / discharging means provided on a control panel different from the control panel provided with the DC bus. The discharging means is provided between the DC buses, stores the DC power from the DC buses during the regenerative operation of the elevator, and supplies the DC power stored during the power running operation to the DC bus, and the DC A bus voltage detecting device for controlling charging / discharging of the power storage device with respect to a bus and detecting the voltage of the DC bus, and the bus voltage detecting device Elevator control apparatus characterized by comprising a charge-discharge control device having a power failure detection means for determining the presence or absence of a power failure on the basis of the detected voltage of the DC bus I.   A converter that rectifies AC power from an AC power source and converts it to DC power, an inverter that converts DC power from this converter into AC power of variable voltage and variable frequency, and drives a drive device, and elevator lift by the drive device Whether to go up and down in the road, DC bus provided between the converter and the inverter, a power failure detection device for detecting a power failure, and a control panel different from the control panel provided with the DC bus Charging / discharging means, wherein the charging / discharging means is provided between the DC buses, accumulates DC power from the DC buses during regenerative operation of the elevator, and stores DC power accumulated during powering operation to the DC buses. The power storage device to be supplied and the bus voltage detection for controlling charging / discharging of the power storage device with respect to the DC bus and detecting the voltage of the DC bus And a power failure determination means for determining the presence or absence of a power failure based on the voltage of the DC bus detected by the bus voltage detection device and a power failure determination device for determining a power failure by a power failure signal from the power failure detection device An elevator control device comprising: a control device.   The car includes a car load measuring device for measuring the load of the car, and the charging / discharging means sets a set value for determining the presence or absence of a power failure based on the car load measured by the car load measuring device. A power failure determination value determining unit is provided, and the power failure determination unit determines whether or not a power failure has occurred based on the set value and the voltage of the DC bus detected by the bus voltage detection device. The elevator control device according to claim 1 or 2.   4. The power failure determination means determines whether or not a power failure has occurred based on a change amount per unit time of the voltage of the DC bus detected by the bus voltage detector. An elevator control device according to claim 1.   The power failure determination means, after determining the presence or absence of a power failure based on the amount of change per unit time of the voltage of the DC bus detected by the bus voltage detector, if the determination of a power failure is not made, The elevator control device according to any one of claims 1 to 4, wherein the presence or absence of a power failure is determined based on a voltage value of a DC bus.

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