JP2007145495A - Automatic elevator landing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an automatic landing device post-installable by constituting the device independently of a main power circuit, eliminating uselessness of design/the setting of an electric power facility while restraining a cost increase, and capable of restraining stain of various waveforms by reducing capacity of a power source system. <P>SOLUTION: This automatic elevator landing device has a transformer 21 connected in parallel to the power source system 1 between an elevator control device 5 controlling an elevator driving part 8 and an AC power source 2 operating these, a switching device 4 interposed rather in the power source 2 side than a connecting point of the transformer 21 in the power source system 1, a current converter 22 connected in series to the transformer 21, and a capacitor 23 connected in series to the transformer 21 via the current converter 22 and lifting to move an elevator car up to a predetermined story floor, by supplying stored electric power to the elevator control device 5 and the elevator driving part 8 in emergency operation for opening the switching device 4, by charging supply electric power supplied from the AC power source 2 in steady operation for closing the switching device 4. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an elevator automatic landing device, and in particular, in the event of an emergency such as a power outage due to an earthquake or the like, even if power supply from an AC power supply is stopped, the operation is stopped after raising and lowering to the nearest floor The present invention relates to an elevator automatic landing apparatus that operates as described above.

  Generally, in elevators installed in buildings, automatic landing devices have been proposed in order to allow users who are in the elevator car to evacuate safely in the event of an emergency such as a power outage. (See Patent Document 1).

  14 and 15 show first and second conventional examples, respectively. In the first conventional example shown in FIG. 14, an automatic landing device 10A at the time of power failure is connected in parallel to a power supply system 1 including an AC power source 2, a breaker 3, an elevator control device 5, and a hoisting machine 9, Two connection points are provided between the breaker 3 and the elevator control device 5 and between the elevator control device 5 and the hoisting machine 9. The automatic landing device 10A is configured by connecting a charging circuit 11, a power storage device 12, a step-up / step-down circuit 13 and a DC-AC conversion circuit 14 in series from the breaker 3 side, and the DC-AC conversion circuit 14 is controlled by an elevator. It is connected to a connection point between the device 5 and the hoisting machine 9. The elevator control device 5 includes a control circuit 6 and an inverter 7.

  Therefore, the automatic landing apparatus 10A of the first conventional example is configured as a separate system from the power supply system 1 and charges the power storage device 12 by the charging circuit 11 when there is no power failure. In addition, since the elevator control device 5 stops at the time of a power failure, the hoisting machine 9 is driven from the power storage device 12 through the step-up / down circuit 13 and the DC-AC conversion circuit 14 to move the user to the nearest floor. The power storage device 12 and the step-up / step-down circuit 13 function as an emergency power source during a power failure and control the hoisting machine 9.

Further, in the second conventional example shown in FIG. 15, the automatic landing device 10 </ b> B directly supplies power to the elevator control device 5 connected between the AC power source 2, the breaker 3 and the hoisting machine 9. Yes, a charging circuit 11 is connected in parallel to a connection point between the breaker 3 and the elevator control device 5, and a power storage device 12 is connected in series to the charging circuit 11. The power storage device 12 directly supplies direct current power to the direct current portion of the inverter 7 of the elevator control device 5, and a step-up / step-down circuit 13 is provided in parallel to the connection line between the power storage device 12 and the direct current portion of the inverter 7. The step-up / down circuit 13 is also connected to the control circuit 6 of the elevator control device 5 to supply electric power. In the case of the second conventional example, even when the breaker 3 is shut off and backed up by the power storage device 12, the control circuit 6 of the elevator control device 5 is used as it is and wound by the DC power supplied to the DC portion of the inverter 7. The upper machine 9 is controlled to be driven.
JP 2003-34947 A

  However, both the first and second conventional examples described above have some problems. First, according to the first conventional example shown in FIG. 14, during steady operation, the control function performed by the elevator control device 5 is used to operate the power storage device 12 and the step-up / down circuit 13 during a power failure during emergency operation. Since the control circuit performs, each control circuit for steady operation and emergency operation is required, and the same components are duplicated, resulting in an increase in cost.

  Further, according to the second conventional example shown in FIG. 15, a circuit that cuts off the high-voltage direct current is required, the circuit becomes complicated for switching the internal circuit of the control device, and a power supply source is provided on the power storage device side in the event of a power failure. When switching, an unexpected problem was likely to occur due to a complicated circuit configuration. In addition, when switching between power outages and non-power outages is strictly performed, it must be designed with a sufficient margin for the capacity of power facilities during non-power outages. Therefore, there is a problem in that there is a waste in the way of designing or setting the power equipment.

  Furthermore, according to the conventional elevator automatic landing apparatus, it takes a great deal of cost and time to attach any of the apparatuses to the existing elevator control apparatus, which is also described in Patent Document 1. As for the second conventional example close to the configuration of the elevator, if the configuration of the control circuit side of the elevator control device or the DC part of the inverter is not a configuration that can be retrofitted with the elevator automatic landing device, the installation itself There was a problem that was impossible.

  The present invention can be configured independently from the main power supply circuit, can be retrofitted, suppresses an increase in cost, has no waste of power facility design or setting, and has recently been required to reduce the capacity of the power supply system. It is another object of the present invention to provide an elevator automatic landing apparatus that satisfies the above requirements and can suppress distortion of various waveforms in a power supply system.

  In order to solve the above problems, an elevator automatic landing apparatus according to a first configuration, which is a basic concept of the present invention, includes an elevator control device that controls an elevator driving unit including at least a hoisting machine, the elevator driving unit, and the elevator control. A transformer connected in parallel to a power supply system between the power supply that operates the device and an AC supplied from the power supply that is inserted on the power supply side from the connection point of the transformer in the power supply system is opened and closed A possible switch, a current converter connected in series to the transformer to convert alternating current flowing from the transformer side to direct current and converting direct current flowing to the transformer side to alternating current, and the current converter, The power supply power supplied from the AC power source is charged during steady operation when the switch is closed and connected in series via the transformer, and the emergency operation when the switch is opened. Characterized in that it comprises a power storage device for vertically moving the elevator car by supplying electric power accumulated in the elevator control device and the elevator drive unit to a predetermined floor in the.

  Further, the elevator automatic landing apparatus according to the second configuration of the present invention is the one described in the first configuration, even when the amount of power of the power storage device varies between the current converter and the power storage device. A step-up / step-down circuit for supplying stable electric power to the elevator control device and the elevator driving unit is further provided.

  Further, the elevator automatic landing apparatus according to the third configuration of the present invention is the one described in the first configuration, wherein the power amount of the power storage device is monitored during the emergency operation, and the power amount is sufficient when the power amount is sufficient. An electric energy monitoring device that supplies electric power so as to provide the elevator control device and the elevator drive unit with the same ascending / lowering operation during steady operation, and moves the elevator car to the nearest floor when the electric energy is low It is further provided with the feature.

  Moreover, the elevator automatic landing apparatus which concerns on the 4th structure of this invention WHEREIN: The load power consumption detection which detects the electric power which the said elevator control apparatus and the said elevator drive part consumes at the time of the said steady operation in the thing as described in a 1st structure And a steady-state power replenishment unit that supplies power from the power storage device while the switch is closed even during the steady operation when the detection value of the load power detection unit exceeds a predetermined value, Is further provided.

  Moreover, the elevator automatic landing apparatus which concerns on the 5th structure of this invention is a thing as described in a 1st structure, The electric current detector which detects a power supply current at the time of the said steady operation, The electric current which detects a power supply voltage at the said steady operation Reactive power compensation that compensates reactive power of a power source and improves power factor from the power storage device based on a current value and a voltage value detected by the detector and the current detector and the power supply voltage device, respectively And a controller.

  Moreover, the elevator automatic landing apparatus which concerns on the 6th structure of this invention is a thing as described in a 1st structure, The leakage current detection part which detects the leakage current from alternating current power supply to a load at the time of the said steady operation, The said leakage current A leakage current compensation controller for supplying power for compensating the leakage current from the power storage device when leakage of current supplied from the AC power source to the elevator control device and the elevator driving unit is detected by a detection unit; Is further provided.

  Moreover, the elevator automatic landing apparatus which concerns on the 7th structure of this invention is the thing of the 1st structure, The voltage monitoring part which monitors the power supply voltage of the said alternating current power supply at the time of the said steady operation, and the said voltage monitoring part monitor And a voltage distortion compensation controller for supplying electric power for compensating for the distortion of the power supply voltage from the power storage device.

  Moreover, the elevator automatic landing apparatus which concerns on the 8th structure of this invention is a thing as described in a 1st structure, The current detector which detects the power supply current of the said alternating current power supply at the time of the said steady operation, and a detection by the said current detector And a current harmonic compensation controller for supplying electric power for compensating harmonic components included in the power supply current from the power storage device.

  The present invention can be configured independently from the main power supply circuit, can be retrofitted, suppresses an increase in cost, has no waste of power facility design or setting, and has recently been required to reduce the capacity of the power supply system. And distortion of various waveforms in the power supply system can be suppressed.

  Hereinafter, embodiments of an elevator automatic landing apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

[First Embodiment]
First, an elevator automatic landing apparatus according to a first embodiment corresponding to the basic concept of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 shows a conceptually superior configuration close to the basic concept, and FIG. 2 shows a more specific configuration, but the basic configuration shown by a solid line is the same.

  First, in FIG. 1, a power supply system 1 includes an AC power supply 2, a breaker 3, an elevator control device 5, and an elevator driving unit 8. The elevator drive unit 8 includes a hoisting machine 9 that winds up at least a main rope (not shown) that holds an elevator car (not shown). The elevator automatic landing apparatus 20 according to the first embodiment includes an elevator control device 5 that controls an elevator drive unit 8 including at least a hoisting machine 9, and an AC power source 2 that operates the drive unit 8 and the control device 5. The transformer 21 connected in parallel to the power supply system 1 between the power supply 2 and the power supply 2 from the connection point of the transformer 21 in the power supply system 1 from the AC power supply 2 to the drive unit 8 is supplied from the power supply 2 side. A switch 4 that can open and close the alternating current, a current converter 22 that is connected in series to the transformer 21 to convert alternating current from the power source 2 into direct current, and converts direct current flowing in the reverse direction into alternating current, It is connected in series to the transformer 21 via the converter 22 and is charged with the power supplied from the AC power source 2 during steady operation when the switch 4 is closed, and accumulated during emergency operation when the switch 4 is opened. Electric power And a power storage device 23 vertically moving the elevator car to a predetermined floor is supplied to the motor controller 5 and the elevator drive unit 8.

  A more specific configuration in which the power supply system 1 is configured by a three-phase AC power supply will be described with reference to FIG. First, the power supply system 1 is configured to supply electric power to the elevator control device 5 from the AC power supply 2 through the breaker 3 and drive the hoisting machine 9. The elevator automatic landing device 20 is provided with a switch 4 between the breaker 3 and the control device 5 in the elevator control device 5, and a transformer, that is, a transformer 21, between the switch 4 and the control device 5. Are connected in parallel, and the power storage device 23 is connected in series via a current converter, that is, an AC-DC converter 22. In such a configuration, at the time of a non-power failure, the switch 4 is closed, and the elevator control device 5 performs an elevator lifting service. In addition, the power storage device 23 is charged via the transformer 21 and the AC-DC converter 22. At the time of a power failure, the switch 4 is opened, and power is supplied from the power storage device 23 to the elevator control device 5 via the AC-DC converter 22 and the transformer 21.

  Note that the current converter 22 that performs current conversion between the power storage device 23 and the transformer 21 at the time of a power failure converts DC power stored in the power storage device 23 into AC power and supplies the AC power to the transformer 21. The transformer 21 converts only the voltage into an optimum voltage for the elevator control device 5 while maintaining the frequency of the AC power supplied from the current converter 22 and supplies the voltage to the control device 5. In addition, the elevator control device 5 whose detailed configuration is omitted in FIG. 1 includes a control circuit 6 and an inverter 7 in the same manner as the conventional one, and receives an alternating current supplied from the power system 1 or the automatic landing device 20 side, respectively. Once it is rectified and converted to DC, it is converted back to AC with adjusted frequency and voltage, and power is supplied to the drive unit 8 such as the hoisting machine 9.

  The operation of the first embodiment corresponding to the basic concept will be described. As shown in FIGS. 1 and 2, the elevator automatic landing apparatus 20 according to the first embodiment forms a power supply system that is separate from the power supply system 1. At the time of steady operation, based on the power supply from the power supply system 1, the elevator control device 5 supplies power to the hoisting machine 9 and other driving devices, for example, the elevator driving unit 8 including a power load such as a car fan, lighting, and an indicator. The elevator control device 5 itself is also operated by AC power supplied from the power source 2.

  The breaker 3 is cut when a power failure occurs such that the desired power is not supplied to the AC power source due to natural disasters such as earthquakes, typhoons, lightning strikes, or excessive human power demand, or man-made malfunctions such as power transmission line failures. Or the switch 4 is opened, and the elevator enters the emergency operation mode. Thereby, the power supply system 1 is interrupted and the power supply from the AC power supply 2 is stopped.

  At this time, if an elevator car that is moving up and down on any floor stops immediately at the operating point, a confinement accident occurs when a user is in the car. The situation that the elevator manager is most worried about during a power outage is the occurrence of this confinement accident, and more alarming is the case where a supervisor such as a management center cannot detect the occurrence of the confinement accident.

  In recent years, a new type of elevator has been proposed in which an elevator is automatically controlled by a seismic control operation when an earthquake occurs. This seismic control system, for example, controls an elevator immediately when an earthquake sensor provided in the vicinity of the elevator control device detects an earthquake, but before the seismic control operation is executed by the operation of the seismic sensor. In addition, when the elevator stops due to a power failure or the like, there is no time for shifting control to control operation, and a confinement accident or the like occurs.

  According to the automatic landing device 20 of the first embodiment, even when such a power failure occurs before the operation of the earthquake control system, as soon as the switch 4 is opened due to interruption of the power supply path of the breaker 3, etc., the power storage device The DC power stored in 23 is supplied to the current converter 22, and the current converter 22 supplies the power converted from DC to AC to the transformer 23, and the transformer 23 does not change the frequency but only the voltage. AC power adjusted to a desired value is supplied to the elevator control device 5.

  In this way, by switching the AC power supply from the AC power supply 2 to the DC power supply from the power storage device 23, the automatic landing device 20 immediately functions when it is detected that an emergency operation such as a power failure is occurring. Since automatic landing operation is provided, it is possible to prevent the occurrence of confinement accidents and the like that cannot be sufficiently supplemented by the seismic control system.

  According to the first embodiment, it is possible to prevent a type of confinement accident that could not be prevented even if a seismic control system is installed, and to store power even in an emergency operation mode during a power failure caused by an earthquake or the like. Automatic landing control operation can be performed with electric power equivalent to that of the power supply system 1 by converting the direct current power stored in the apparatus into alternating current and adjusting the voltage. As a result, the reliability of the elevator during a power failure can be significantly improved, and the occurrence of a confinement accident during a power failure, which is the worst case, can be avoided as much as possible.

[Second Embodiment]
Next, the elevator automatic landing apparatus which concerns on 2nd Embodiment of this invention is demonstrated, referring FIG. In FIG. 3, an elevator automatic landing apparatus 20 is provided with a step-up / down circuit 24 in addition to the configuration of the first embodiment. The step-up / step-down circuit 24 is provided between the AC-DC converter 22 that is a current converter and the power storage device 23, and even when the electric energy of the power storage device 23 fluctuates, the elevator control device 5 and the elevator driving unit. In order to supply stable electric power to 8, the voltage is stepped up or stepped down.

  In the second embodiment, the power storage device 23 is charged / discharged as in the first embodiment. In addition, by inserting the step-up / step-down circuit 24 between the AC-DC converter 22 and the power storage device 23, the stored power of the power storage device 23 is reduced during discharge and stable even if the terminal voltage decreases. Power can be supplied, and at the time of charging, the most efficient charging voltage can be controlled. In addition, the transformer 21 can be replaced with a filter circuit by increasing or decreasing the voltage by the step-up / step-down circuit 24.

[Third Embodiment]
Next, an elevator automatic landing apparatus according to a third embodiment of the present invention will be described with reference to FIG. As shown in FIG. 4, the elevator automatic landing apparatus 20 further includes an electric energy monitoring device 25 in addition to the configuration of the second embodiment. The power amount monitoring device 25 monitors the power amount of the power storage device 23 during an emergency operation, and provides the elevator controller 5 and the drive unit 8 with a lift operation equivalent to that during steady operation when the power amount is sufficient. When the electric power is low, the elevator car is moved to the nearest floor.

  In the third embodiment, charging / discharging of the power storage device 23 is performed as in the first and second embodiments. In addition to this, the third embodiment monitors the amount of power stored in the power storage device 23 and outputs a signal to the elevator control device 5. When the amount of stored power is large, normal operation is performed. Stop at the floor.

  According to the third embodiment, the amount of power stored in the power storage device 23 is constantly monitored by the power amount monitoring device 25, the switch 4 is opened, and the power supply from the AC power supply 2 is cut off. The elevator controller 5 calculates the possible drive time of the drive unit 8 including the hoisting machine 9 based on the monitored accumulated electric energy of the power storage device 23 when the supply of the power source is started. Operation can be secured.

[Fourth Embodiment]
Next, an elevator automatic landing apparatus according to a fourth embodiment of the present invention will be described with reference to FIG. As shown in FIG. 5, the elevator automatic landing device 20 is provided between the connection point of the transformer 21 of the power supply system 1 and the switch 4 in addition to the configuration described in the second embodiment. A current detector 26 for detecting the current of the current, and a power supplement command (power supply command) 27 for instructing the power supply command to the AC-DC converter 22 based on the detected value of the current detector 26 to replenish the power. And. The current detection unit 26 is a load power consumption detection unit that detects the power consumed by the elevator controller 5 and the elevator drive unit 8 during steady operation, and the power supplement unit 27 is a detection value of the current detection unit 26 as a load power detection unit. When the value exceeds a predetermined value, it functions as a steady-state power supplementing unit that supplies power from the power storage device 23 with the switch 4 being closed even during steady operation.

  Next, the relationship between the operation time and the electric energy in an elevator to which the fourth embodiment is applied will be described with reference to the characteristic diagram of FIG. In order to raise and lower the elevator, there are three operation periods in which the elevator is accelerated after starting to move, reaches a steady state, and decelerates to stop the car on the stop floor. FIG. 6 shows the change characteristics of the electric energy during the three operation periods. In the acceleration period, it is directly proportional to the moment of transition to the steady period, consumes a constant amount of power in the steady period, and in the deceleration period, the amount of power jumps momentarily at the moment of transition and then decreases in proportion to the deceleration state.

  Therefore, there is a time exceeding the set value indicated by the broken line in FIG. 6 only in a predetermined period immediately before the transition from the acceleration period to the steady period (hatched portion). By applying the fourth embodiment to the time of the hatched portion, if the amount of current is detected and the portion exceeding the set value of power is supplemented with the power supplied from the power storage device 23, The capacity of the building's power equipment, including power consumption, can be limited to a set value.

  According to the fourth embodiment shown in FIG. 5, not only is the power storage device 23 charged during steady operation without a power failure, but also the current detector 26 detects the current flowing from the power source 2 of the power system 1. Monitoring is performed to supply power from the power storage device 23 when a current of a certain level or more is about to flow, and power supply on the power source 2 side is reduced. Thereby, the capacity | capacitance of power supply equipment can be made small. In recent years, since the power load of buildings has increased, there is a tendency to increase the capacity of power supply facilities. According to the fourth embodiment, even when the demand for power loads in buildings increases, the power of elevators Instead of relying solely on the AC power supply 2, the demand is supplied from the amount of stored power in the power storage device 23, which contributes to a reduction in the capacity of the power supply equipment in the building including the elevator.

[Fifth Embodiment]
Next, an elevator automatic landing apparatus according to a fifth embodiment of the present invention will be described with reference to FIG. 7, in addition to the configuration of the second embodiment, the elevator automatic landing apparatus 20 includes a current detector 26 as a power supply monitoring unit that monitors a power supply state including a power supply voltage and a power supply current during steady operation, A reactive power compensation controller 28 as a power supply state improvement unit that adjusts reactive power based on the state of the power supply monitored by the current detector 26 as a power supply monitoring unit and supplies power with improved power factor from the power storage device 23. And further comprising. The reactive power compensation controller 28 is also supplied with a detection output of a voltage detector 29 that detects a voltage of a supply line that supplies stored power from the transformer 21 to the power supply system 1.

  In the fifth embodiment having the above-described configuration, not only the storage device 23 is charged during a power outage, but also the current flowing from the AC power source 2 is detected by the current detector 26, and the transformer 21 is connected to the elevator control device 5 by the voltage detector 29. And the reactive power compensation controller 28 controls the reactive power compensation controller 28 to reduce the reactive power based on the detected current value and voltage value, and supplies power from the power storage device 23 to the power source side. The power factor is controlled to be close to “1”.

  FIG. 8 shows the detected voltage value of the voltage detector 29, the detected current value of the current detector 26, the compensated power waveform from the power storage device 23, and the output waveform appearing in the power system 1 in order from the top. Yes. The phase of the AC voltage waveform output from the transformer 21 and the current waveform on the downstream side of the switch 4 are shifted from each other by a quarter period. Due to this phase difference, the power factor on the power source side becomes a desired value. Not. In order to compensate for a state where the power factor is not a desired value due to this phase difference, the power storage device 23 outputs a compensation waveform as shown as the output of the power storage device 23, and Shows the waveform shown at the bottom. In this way, the reactive power compensation controller 28 performs compensation control so that the power factor on the power supply side is set to “1”.

  According to the fifth embodiment having the above-described configuration and operation, the basic function is to accumulate electric power at the time of non-power outage and to automatically land the elevator car at the time of power outage as in the first embodiment. Although the elevator control device 5 is controlled, in addition to this, during steady operation during a power outage, the current value of the power supply system 1 and the output voltage value of the power storage device 23 are detected and the respective phase differences are compensated and controlled. As a result, reactive power compensation is also performed, so that the operation efficiency of the elevator during steady operation can be greatly improved.

[Sixth Embodiment]
Next, an elevator automatic landing apparatus according to a sixth embodiment of the present invention will be described with reference to FIG. In FIG. 9, the elevator automatic landing apparatus 20 includes a leakage current compensation controller 30 and a zero-phase current detector (ZCT) 31 in addition to the configuration of the second embodiment. In FIG. 9, a zero-phase current detector 31 is provided as a leakage current detector that detects a leakage current from the AC power supply 2 to the load during steady operation. When the leakage of the alternating current supplied from the AC power source 2 to the elevator control device 5 and the drive unit 8 is detected by the zero-phase current detector 31 as the leakage current detection unit, the leakage as the leakage current compensation unit is detected. The current compensation controller 30 is configured to supply power for compensating for the leakage current from the power storage device 23.

  That is, according to the sixth embodiment, not only the power storage device 23 is charged during a power outage, but also the zero phase current of the AC power supply 2 is detected by the zero phase current detector (ZCT) 31 and the leakage current compensation controller 30 is detected. Thus, electric power is supplied from the power storage device 23 so that the leakage current is reduced.

[Seventh Embodiment]
Next, the elevator automatic landing apparatus which concerns on 7th Embodiment of this invention is demonstrated, referring FIG. 10 and FIG. First, in FIG. 10, in addition to the configuration of the second embodiment, the elevator automatic landing apparatus 20 includes a voltage detector 29 as a voltage monitoring unit that monitors the power supply voltage of the AC power supply 2 during steady operation, and a voltage monitoring unit. And a voltage distortion compensation controller 32 as a distortion compensator for supplying power for compensating for distortion of the power supply voltage monitored by the voltage detector 29 from the power storage device 23.

  According to the seventh embodiment, not only the power storage device 23 is charged during a power outage, but also the voltage distortion of the power source 2 is detected by the voltage detector 29 and the voltage distortion is reduced by the voltage distortion compensation controller 32. Compensation control is performed so that power is supplied from the power storage device 23. FIG. 11 is a characteristic diagram showing the power supply voltage, current, and compensation value for which this compensation control is being performed. Since the current waveform appears strongly corresponding to the period corresponding to the peak portion of the voltage waveform, this is canceled out. By outputting a compensation value of a gentle curve in the same period, voltage distortion is compensated.

[Eighth Embodiment]
Next, an elevator automatic landing apparatus according to an eighth embodiment of the present invention will be described with reference to FIGS. 12, in addition to the configuration of the second embodiment, the elevator automatic landing apparatus 20 includes a current detector 26 that monitors the power source current of the AC power source 2 during steady operation, and a power source current detected by the current detector 26. And a harmonic current compensator 33 for supplying power compensated for the harmonic component contained in the power storage device 23 from the power storage device 23.

  According to the eighth embodiment, not only the power storage device 23 is charged during a non-power failure, but also all phase currents of the power supply 2 are detected by the current detector 26, and current harmonics are detected by the current harmonic compensation controller 33. Electric power is supplied from the power storage device 23 so as to be reduced. The upper part of FIG. 13 shows a waveform of a detection current of one phase as an example, and the lower part of FIG. 13 shows a harmonic component corresponding to this waveform indicated by a broken line. By supplying electric power that compensates for this harmonic component, the elevator controller 5 and the hoisting machine 9 can be driven by the electric power whose harmonic component is compensated.

  In addition, although the 1st thru | or 8th embodiment mentioned above can each be implemented independently, it is also possible to implement combining some of described embodiment. In any embodiment, it is possible to add only the elevator automatic landing device 20 to the power supply system 1 without changing the configuration of the elevator control device 5 and the subsequent components. Moreover, it is used to compensate for various components of the power supplied to the power supply system 1 without having to limit the use and operation of the automatic landing device at the time of non-power failure to only charging, and has a compensating effect. By doing so, it is possible to negate the meaning of adding unnecessary facilities, and in addition to a backup function in the event of a power failure, accurate control during steady operation is possible and a comfortable boarding feeling can be provided to the user.

The block block diagram which shows the elevator automatic landing apparatus of 1st Embodiment of a basic concept. The block diagram which shows the detailed structure of 1st Embodiment. The block diagram which shows the structure of the elevator automatic landing apparatus by 2nd Embodiment. The block diagram which shows the structure of the elevator automatic landing apparatus by 3rd Embodiment. The block diagram which shows the structure of the elevator automatic landing apparatus by 4th Embodiment. The characteristic view which shows the waveform of the electric power supplied to the elevator control apparatus of FIG. The block diagram which shows the structure of the elevator automatic landing apparatus by 5th Embodiment. The characteristic view which shows the voltage, electric current, and electric power waveform of each part of FIG. The block diagram which shows the structure of the elevator automatic landing apparatus by 6th Embodiment. The block diagram which shows the structure of the elevator automatic landing apparatus by 7th Embodiment. Voltage and current of each part in FIG. The characteristic view which shows the waveform of a compensation value. The block diagram which shows the structure of the elevator automatic landing apparatus by 8th Embodiment. The characteristic view which shows the waveform of the electric current and a harmonic component of each part of FIG. The block diagram which shows the structure of the elevator automatic landing apparatus by a 1st prior art example. The block diagram which shows the structure of the elevator automatic landing apparatus by a 2nd prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Power supply system 4 Switch 5 Elevator control apparatus 8 Elevator drive part 9 Hoisting machine 20 Elevator automatic landing apparatus 21 Transformer (transformer)
22 Current converter (AC-DC converter)
23 power storage device 24 step-up / down circuit 25 power monitoring device 26 current detector 27 power supplement unit (power supply command)
28 Reactive power compensation controller 29 Voltage detector 30 Leakage current compensation controller 31 Zero current detector 32 Voltage distortion compensation controller 33 Current harmonic compensation controller

Claims (8)

A transformer connected in parallel to a power system between an elevator control device that controls an elevator drive unit including at least a hoisting machine and a power source that operates the elevator drive unit and the elevator control device;
A switch capable of opening and closing the alternating current supplied from the power supply, which is inserted on the power supply side from the connection point of the transformer in the power supply system;
A current converter connected in series to the transformer to convert alternating current flowing from the transformer side into direct current and converting direct current flowing to the transformer side to alternating current;
It is connected in series to the transformer via the current converter, and charges the power supply supplied from the AC power source during steady operation when the switch is closed, and accumulates during emergency operation when the switch is opened. A power storage device that moves the elevator car up and down to a predetermined floor by supplying the generated electric power to the elevator controller and the elevator drive unit;
An elevator automatic landing apparatus comprising:   A step-up / step-down circuit for supplying stable power to the elevator control device and the elevator driving unit even when the amount of power of the power storage device fluctuates between the current converter and the power storage device. 2. The elevator automatic landing apparatus according to claim 1, wherein   The power amount of the power storage device is monitored during the emergency operation, and when the power amount is sufficient, power is supplied so as to provide the elevator control device and the elevator drive unit with the same lift operation as during the steady operation. The elevator automatic landing apparatus according to claim 1, further comprising a power amount monitoring device that moves the elevator car to a nearest floor when the power amount is low.   Even during the steady operation when the detected value of the load power detection unit exceeds a predetermined value, a load power consumption detection unit that detects power consumed by the elevator control device and the elevator drive unit during the steady operation The elevator automatic landing apparatus according to claim 1, further comprising a steady-state power replenishment unit that supplies power from the power storage device with the switch closed.   Based on a current detector that detects a power supply current during the steady operation, a voltage detector that detects a power supply voltage during the steady operation, and a current value and a voltage value detected by the current detector and the voltage detector, respectively. The elevator automatic landing apparatus according to claim 1, further comprising: a reactive power compensation controller that compensates reactive power of a power source to supply power that improves power factor from the power storage device.   A leakage current detection unit that detects a leakage current from the AC power supply to the load during the steady operation, and a leakage of current supplied from the AC power supply to the elevator controller and the elevator driving unit is detected by the leakage current detection unit The elevator automatic landing apparatus according to claim 1, further comprising: a leakage current compensation controller configured to supply electric power for compensating the leakage current from the power storage device when the operation is performed.   A voltage monitoring unit that monitors the power supply voltage of the AC power supply during the steady operation, and a voltage distortion compensation controller that supplies power from the power storage device to compensate for distortion of the power supply voltage monitored by the voltage monitoring unit. The elevator automatic landing apparatus according to claim 1, further comprising:   A current detector that detects a power source current of the AC power source during the steady operation, and a current harmonic compensation that supplies power from the power storage device to compensate for a harmonic component included in the power source current detected by the current detector The elevator automatic landing apparatus according to claim 1, further comprising a controller.

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