JP5240685B2 - elevator - Google Patents

Description

  The present invention relates to an elevator having an operation function during a power failure.

  FIG. 12 is a diagram showing a schematic configuration of a conventional elevator. This elevator has, as a drive system, a customer power source 101, a converter device 102 that converts an AC voltage of the customer power source 101 into a DC voltage, a smoothing capacitor 103 that smoothes a ripple of the DC voltage, and this DC voltage. The inverter apparatus 104 which converts into the alternating voltage of a variable voltage variable frequency, and the electric motor 105 which receives the electric power from this inverter apparatus 104, and operate | moves are provided.

  The customer power supply 101 is a three-phase power supply. The AC voltage from the three-phase power source is full-wave rectified by the converter device 102, and the ripple is absorbed by the smoothing capacitor 103 and smoothed to direct current. The smoothed direct current is supplied to the inverter device 104, converted into an alternating voltage having a predetermined frequency, and supplied to the electric motor 105 as drive power.

  The electric motor 105 is rotationally driven by such power supply, and the sheave 107 is rotated accordingly, and the car 108 and the counterweight 109 are lifted and lowered in the hoistway through the rope wound around the sheave 107. Operate.

  The elevator also includes a current detection device 111 that detects the current on the AC input side of the converter device 102 via the current detector 106, a DC voltage command device 113 that outputs a command value of the terminal voltage of the smoothing capacitor 103, And a DC voltage detection device 115 that detects a terminal voltage of the smoothing capacitor 103.

  This elevator also outputs a command value of the current on the AC input side of converter device 102 based on the deviation between the voltage detected by DC voltage detection device 115 and the command value from DC voltage command device 113. 114, and a current control device 112 that controls the current on the AC input side of the converter device 102 based on the deviation between the current value detected by the current detection device 111 and the command value from the voltage control device 114.

  This elevator includes a storage voltage conversion device 100 that converts the voltage from the customer power supply 101 during powering operation in normal operation and stores it in the power storage device 121, a power failure detection device 122 that detects a power failure of the customer power supply 101, and this When the power failure detection device 122 detects a power failure, the power stored in the power storage device 121 is discharged for operation at the time of the power failure and supplied to the power supply line, that is, the DC bus between the converter device 102 and the inverter device 104. And a storage voltage control device 123 that performs.

  In this elevator, power is supplied from the customer power source 101 during power running, and the inverter device is controlled from the converter device 102 to rotate the electric motor 105 to run the car 108. And energy is returned from the electric motor 105 at the time of regenerative operation. This energy is returned from the inverter device 104 to the customer power supply 101 via the converter device 102.

Moreover, as a method of charging / discharging the power storage device in an elevator, for example, as disclosed in Patent Document 1, there is one that controls charging / discharging of the power storage device by a voltage value of a smoothing capacitor.
JP 2005-343574 A

  As described above, the power storage device is charged from the customer power source, and this charged power is used for operation during a power failure, while it is used when there is no power failure, that is, during powering operation. Not. Therefore, the energy in the elevator cannot be used effectively.

  Accordingly, an object of the present invention is to provide an elevator capable of effectively utilizing the power stored in the power storage device while supplying power for operation during a power failure from the power storage device.

  That is, an elevator according to the present invention includes a converter device that converts an AC voltage from an external AC power source into a DC voltage, a smoothing capacitor that smoothes the pulsation of the DC voltage converted by the converter device, and a smoothed DC voltage. Device that converts and outputs AC to AC voltage of variable voltage and variable frequency, an electric motor driven by the AC voltage output from the inverter device to raise and lower the car, a power storage device that stores electric power, and an AC input of the converter device A current detection device that detects the direction of the current on the side and a power failure detection device that detects a power failure of the external AC power supply. Based on the current direction detected by the current detection device, whether or not the car is in powering operation is regenerated. The power stored in the power storage device is detected when the car is in powering operation or when the power failure detection device detects a power failure. Is supplied to the converter unit, characterized in that charging the regenerative power to the power storage device when in the regenerative operation of the car.

ADVANTAGE OF THE INVENTION According to this invention , the electric power stored in the said electrical storage apparatus can be utilized effectively, supplying the electric power for the driving | operation at the time of a power failure from the electrical storage apparatus of an elevator.

Embodiments of the present invention will be described below with reference to the drawings.
(First embodiment)
First, a first embodiment of the present invention will be described.
FIG. 1 is a diagram schematically showing the configuration of an elevator according to the first embodiment of the present invention.
In the elevator shown in FIG. 1, a customer power source 1 that is an external AC power source, a converter device 2 that converts an AC voltage of the customer power source 1 into a DC voltage, and a DC voltage ripple or pulsation are smoothed as a drive system. A smoothing capacitor 3 to be converted, an inverter device 4 that converts this DC voltage into an AC voltage having a variable voltage and a variable frequency, and an electric motor 5 that operates by receiving electric power from the inverter device 4. Further, a current detector 6 is provided between the customer power source 1 and the converter device 2.

  The customer power source 1 is a three-phase power source. The AC voltage from the three-phase power source is full-wave rectified by the converter device 2, and the ripple is absorbed by the smoothing capacitor 3 and smoothed to direct current. The smoothed direct current is supplied to the inverter device 4, converted into an alternating voltage having a predetermined frequency, and supplied to the electric motor 5 as drive power.

  The electric motor 5 is rotationally driven by such power supply, and the sheave 7 is rotated accordingly, and the car 8 and the counterweight 9 are lifted and lowered in the hoistway through a rope wound around the sheave 7. Operate.

  The elevator also includes a current detection device 11, a current control device 12 as current control means, a DC voltage command device 13 as voltage command means, a voltage control device 14 as voltage control means, and a DC voltage detection device 15. With.

  The current detection device 11 detects the current value on the AC input side of the converter device 2 and the direction of the current via the current detector 6. The direction of current described here is one of a power running direction that is a direction from the customer power source 1 to the converter device 2 and a regeneration direction that is a direction from the converter device 2 to the customer power source 1.

  The DC voltage command device 13 outputs the command value of the terminal voltage of the smoothing capacitor 3 as a main circuit voltage command for maintaining the supply voltage to the electric motor 5. The DC voltage detection device 15 detects the terminal voltage of the smoothing capacitor 3.

  The voltage control device 14 obtains a deviation between the voltage detected by the DC voltage detection device 15 and the command value from the DC voltage command device 13, and the command value of the current on the AC input side of the converter device 2 to eliminate this deviation and A signal indicating the direction of the current is output.

  Current control device 12 obtains a deviation between the current value detected by current detection device 11 and the command value from voltage control device 14, and controls the current of converter device 2 so as to eliminate this deviation.

  In addition, a charging / discharging circuit 24 that is a series circuit of a charging switching element 22a and a discharging switching element 22b that are self-extinguishing elements is provided between the DC buses that are power supply lines. Specifically, one end of the charging switching element 22a is connected to the high potential side between the DC buses, and one end of the discharging switching element 22b is connected to the other end of the charging switching element 22a. The other end of the discharge switching element 22b is connected to the low potential side between the DC buses.

  One end of a DC reactor 23 that smoothes DC power is connected to a common connection portion of the switching elements 22a and 22b. A power storage device 21 is provided between the other end of the DC reactor 23 and the low potential side of the DC bus.

  The power storage device 21 is composed of, for example, a secondary battery such as a nickel metal hydride battery, a lithium ion battery, or a lithium polymer battery, or a large capacity capacitor such as an electric double layer capacitor, and supplies power to the inverter device 4 during regenerative operation of the electric motor 5. Regenerative energy (electric power) generated between DC buses that are lines is stored.

  The power storage device 21 can store power necessary for landing operation at the time of a power failure and power for powering operation. The landing operation at the time of a power failure is an operation in which the car 8 is moved up and down at a lower speed than that at the time of operation according to call registration by landing at the nearest floor of the lift destination during a power failure. This stored electric power is used as a drive power source for raising and lowering the car 8 during a power failure or powering operation or as a power source for a control circuit (not shown).

  The elevator also includes a storage voltage control device 25 and a power failure detection device 26 that function as storage voltage control means. The power failure detection device 26 detects a power failure of the customer power supply 1 and outputs a signal indicating that this power failure has been detected to the storage voltage control device 25.

  When the signal from the power failure detection device 26 is input, the storage voltage control device 25 discharges the power charged in the storage device 21 and supplies it between the DC buses by turning on the discharge switching element 22b. .

  Further, the storage voltage control device 25 also functions as a discriminating means for discriminating whether the electric motor 5 is in a power running operation or a regenerative operation based on the direction of the current detected by the current detection device 11 when it is not during a power failure. Then, charging / discharging of the power storage device 21 is controlled according to the determination result.

Next, the operation by the storage voltage control device 25 will be described. FIG. 2 is a diagram showing, in tabular form, the types of operation of the elevator according to the first embodiment of the present invention.
As shown in FIG. 2, the storage voltage control device 25 is in a powering operation when the direction of the current detected by the current detection device 11 is the direction from the customer power supply 1 to the converter device 2, that is, the powering direction. By discriminating and turning on the discharge switching element 22b, the power charged in the power storage device 21 is discharged and supplied between the DC buses.

  On the other hand, when the direction of the current detected by the current detection device 11 is the direction from the converter device 2 to the customer power source 1, that is, the regeneration direction, the storage voltage control device 25 determines that the regeneration operation is being performed, The regenerative power is charged in the power storage device 21 by turning on the switching element 22a.

As described above, in the elevator according to a first embodiment of the present invention, the storage voltage controller 25, not only to discharge the power charged in the power storage device 21 at the time of power failure, customers supply 1 Contact and converter Based on the current between the devices 2, it is determined whether it is in powering operation or regenerative operation, and charging / discharging of the power storage device 21 is controlled according to this determination result. Therefore, not only can the power supply during a power failure be performed, but also the power charged in the power storage device 21 can be effectively utilized even when the power failure is not occurring.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. In addition, description of the part same as what was shown in FIG. 1 among the structures of the elevator which concerns on this embodiment is abbreviate | omitted.
FIG. 3 is a diagram showing an outline of the configuration of the elevator according to the second embodiment of the present invention.
Unlike the first embodiment, the storage voltage control device 25 for an elevator according to the second embodiment of the present invention is powered by the direction of the current commanded from the voltage control device 14 when it is not during a power failure. It is determined whether the operation is being performed or the regenerative operation is being performed, and charging / discharging of the power storage device 21 is controlled according to the determination result.

Next, the operation by the storage voltage control device 25 will be described. FIG. 4 is a diagram showing, in a tabular form, the types of operation of the elevator according to the second embodiment of the present invention.
As shown in FIG. 4, when the direction of the current command from the voltage control device 14 is the direction from the customer power supply 1 to the converter device 2, the storage voltage control device 25 determines that the power running operation is in progress, and discharges By turning on the switching element 22b for power, the power charged in the power storage device 21 is discharged and supplied between the DC buses.

  On the other hand, when the direction of the current command from the voltage control device 14 is the direction from the converter device 2 to the customer power source 1, the storage voltage control device 25 determines that the regenerative operation is being performed, and sets the charging switching element 22 a The power storage device 21 is charged with regenerative power by turning it on.

  As described above, in the elevator according to the second embodiment of the present invention, the power storage voltage control device 25 not only discharges the power charged in the power storage device 21 in the event of a power failure, but also the current from the voltage control device 14. Based on the direction of the command, it is determined whether the power running operation or the regenerative operation is being performed, and charging / discharging of the power storage device 21 is controlled according to the determination result. Therefore, similarly to the first embodiment, not only can power supply be performed during a power failure, but also the power charged in the power storage device 21 can be effectively utilized even when the power failure is not occurring.

(Third embodiment)
Next, a third embodiment of the present invention will be described. In addition, description of the part same as what was shown in FIG. 1 among the structures of the elevator which concerns on this embodiment is abbreviate | omitted.
FIG. 5 is a diagram showing an outline of the configuration of the elevator according to the third embodiment of the present invention.
As shown in FIG. 5, the elevator according to the third embodiment of the present invention is provided with a motor current detector 41 between the inverter device 4 and the motor 5, unlike the first embodiment.

  Further, the elevator according to the present embodiment includes a motor current control device 42 that is a motor current control means, a motor current detection device 43, a speed detection device 44, a speed control device 45 that is a speed control means, and a speed that is a speed command means. A command device 46 is provided.

  The motor current detection device 43 detects the current value between the inverter device 4 and the motor 5 and the direction of the current via the motor current detector 41. The direction of the current between the inverter device 4 and the electric motor 5 is either a power running direction that is a direction from the inverter device 4 to the electric motor 5 or a regeneration direction that is a direction from the electric motor 5 to the inverter device 4.

  The speed command device 46 receives a start command for the electric motor 5 from an elevator control panel (not shown) and outputs a speed command value for the electric motor 5. The speed detection device 44 detects the current rotation speed of the electric motor 5.

  The speed control device 45 obtains a deviation between the speed command value from the speed command device 46 and the speed detection value by the speed detection device 44, and outputs a current command that eliminates this deviation. This current command consists of a current command value and the direction of the current. The direction indicated by the command from the speed control device 45 is either a power running direction that is a direction from the inverter device 4 to the electric motor 5 or a regeneration direction that is a direction from the electric motor 5 to the inverter device 4.

  The motor current control device 42 matches the current between the inverter device 4 and the motor 5 to the current command value based on the current value detected by the motor current detection device 43 and the current command value from the speed control device 45. Control.

  Unlike the first embodiment, the storage voltage control device 25 for an elevator according to the third embodiment of the present invention is powered by the direction of the current detected by the motor current detection device 43 when it is not during a power failure. It is determined whether the operation is being performed or the regenerative operation is being performed, and charging / discharging of the power storage device 21 is controlled according to the determination result.

Next, the operation by the storage voltage control device 25 will be described. FIG. 6 is a diagram showing, in tabular form, the types of operation of the elevator according to the third embodiment of the present invention.
As shown in FIG. 6, the storage voltage control device 25 determines that the current is detected during the power running operation when the direction of the current detected by the motor current detection device 43 is the direction from the inverter device 4 to the motor 5, that is, the power running direction. Then, by turning on the discharge switching element 22b, the power charged in the power storage device 21 is discharged and supplied between the DC buses.

  On the other hand, when the direction of the current detected by the motor current detection device 43 is the direction from the motor 5 to the inverter device 4, that is, the regeneration direction, the storage voltage control device 25 determines that the regeneration operation is being performed, and charging switching is performed. The regenerative power is charged in the power storage device 21 by turning on the element 22a.

  As described above, in the elevator according to the third embodiment of the present invention, the storage voltage control device 25 not only discharges the electric power charged in the storage device 21 at the time of a power failure, but also the inverter device 4 and the electric motor 5. Based on the direction of the current between them, it is determined whether it is in powering operation or regenerative operation, and charging / discharging of the power storage device 21 is controlled according to this determination result. Therefore, similarly to the first embodiment, not only can power supply be performed during a power failure, but also the power charged in the power storage device 21 can be effectively utilized even when the power failure is not occurring.

(Fourth embodiment)
Next, a fourth embodiment of the present invention will be described. In addition, description of the part same as what was shown in FIG. 5 among the structures of the elevator which concerns on this embodiment is abbreviate | omitted.
FIG. 7 is a diagram showing an outline of the configuration of the elevator according to the fourth embodiment of the present invention.
As shown in FIG. 7, the storage voltage control device 25 for an elevator according to the fourth embodiment of the present invention differs from the third embodiment in that it is a current command from the speed control device 45 when it is not during a power failure. Based on the indicated direction, it is determined whether the power running operation or the regenerative operation is being performed, and charging / discharging of the power storage device 21 is controlled according to the determination result.

Next, the operation by the storage voltage control device 25 will be described. FIG. 8 is a diagram showing, in tabular form, the types of operation of the elevator according to the fourth embodiment of the present invention.
As shown in FIG. 8, when the direction indicated by the current command from the speed control device 45 is the direction from the inverter device 4 to the electric motor 5, that is, the power running direction, the stored voltage control device 25 is in the power running operation. By discriminating and turning on the discharge switching element 22b, the power charged in the power storage device 21 is discharged and supplied between the DC buses.

  On the other hand, when the direction of the current command from the voltage control device 14 is the direction from the electric motor 5 to the inverter device 4, that is, the regenerative direction, the storage voltage control device 25 determines that the regenerative operation is being performed, and the charging switching element The regenerative power is charged in the power storage device 21 by turning on 22a.

  As described above, in the elevator according to the fourth embodiment of the present invention, the power storage voltage control device 25 not only discharges the power charged in the power storage device 21 in the event of a power failure, but also the current from the speed control device 45. Based on the direction indicated by the command, it is determined whether the power running operation or the regenerative operation is being performed, and charging / discharging of the power storage device 21 is controlled according to the determination result. Therefore, not only can the power supply during a power failure be performed, but also the power charged in the power storage device 21 can be effectively utilized even when the power failure is not occurring.

(Fifth embodiment)
Next, a fifth embodiment of the present invention will be described. In addition, description of the part same as what was shown in FIG. 5 among the structures of the elevator which concerns on this embodiment is abbreviate | omitted.
FIG. 9 is a diagram schematically showing the configuration of the elevator according to the fifth embodiment of the present invention.
As shown in FIG. 9, the elevator according to the fifth embodiment of the present invention further includes a power running / regeneration determination device 51. Whether the power running / regeneration discriminating device 51 is in a power running operation or a regenerative operation based on the direction of the current detected by the current detection device 11 or the direction of the current detected by the motor current detection device 43 when it is not during a power failure. And a signal indicating the result of the determination is output to the storage voltage control device 25.

  Further, unlike the third embodiment, the storage voltage control device 25 controls charging / discharging of the storage device 21 according to a control signal from the power running / regeneration determination device 51 when it is not during a power failure.

Next, the operation by the storage voltage control device 25 will be described. FIG. 10 is a diagram showing, in a tabular form, types of elevator operation according to the fifth embodiment of the present invention.
As shown in FIG. 10, the power running / regeneration discriminating device 51 is configured such that the direction of the current detected by the current detecting device 11 is the direction from the customer power source 1 to the converter device 2 and the current detected by the motor current detecting device 43. When the direction is the direction from the inverter device 4 to the electric motor 5, it is determined that the power running operation is being performed. In this case, the storage voltage control device 25 discharges the power charged in the storage device 21 and supplies it between the DC buses by turning on the discharge switching element 22b.

  On the other hand, in the power running / regeneration discriminating device 51, the direction of the current detected by the current detecting device 11 is the direction from the converter device 2 to the customer power source 1, and the direction of the current detected by the motor current detecting device 43 is the electric motor 5. Is in the direction from the inverter device 4 to the inverter device 4, it is determined that the regenerative operation is being performed. In this case, the storage voltage control device 25 charges the storage device 21 with regenerative power by turning on the charging switching element 22a.

  As described above, in the elevator according to the fifth embodiment of the present invention, the storage voltage control device 25 not only discharges the power charged in the storage device 21 during a power failure, but also by the power running / regeneration determination device 51. Charging / discharging of power storage device 21 is controlled according to the determination result of whether it is during power running operation or regenerative operation. Therefore, not only can the power supply during a power failure be performed, but also the power charged in the power storage device 21 can be effectively utilized even when the power failure is not occurring.

(Sixth embodiment)
Next, a sixth embodiment of the present invention will be described. In addition, description of the part same as what was shown in FIG. 1 among the structures of the elevator which concerns on this embodiment is abbreviate | omitted.
FIG. 11 is a diagram showing a schematic configuration of an elevator according to the sixth embodiment of the present invention.
As shown in FIG. 11, the elevator according to the sixth embodiment of the present invention further includes a storage voltage limit device 61.
The storage voltage limit device 61 sets the charge limit value and the discharge limit value of the voltage of the electric power stored in the power storage device 21. This charging limit value is a value that can prevent damage to the power storage device 21 due to overcharging, and the discharge limit value is a value at which the power charged in the power storage device 21 becomes the power required for landing operation during a power failure.

  In this embodiment, when the signal from the power failure detection device 26 is input, the storage voltage control device 25 discharges the electric power stored in the storage device 21 by turning on the discharge switching element 22b and the DC bus. Supply in between.

  Further, the storage voltage control device 25 determines whether it is in powering operation or regenerative operation based on the current detected by the current detection device 11 when it is not during a power failure, and in response to this determination result, Control charge and discharge. However, the storage voltage control device 25 makes the voltage of the electric power charged in the electric storage device 21 to be equal to or less than the above-described charging limit value during the charge control, and the electric voltage charged in the electric storage device 21 during the discharge control. It is made to become more than the discharge limit value mentioned above.

  As described above, in the elevator according to the sixth embodiment of the present invention, in addition to the features described in the first embodiment, charging / discharging of the power storage device 21 is performed by using the voltage of the power charged in the power storage device 21. It is made to become below a charge limit value, and it is made for the voltage of the electric power charged to the electrical storage apparatus 21 to become more than the discharge limit value mentioned above at the time of discharge control. Therefore, since the overcharge to the power storage device 21 can be prevented, the power storage device 21 can be protected, and even when the power storage device 21 is discharged, the electric power necessary for the landing operation during a power failure can be maintained.

  In this embodiment, it has been described that the storage voltage control device 25 determines whether it is in a power running operation or a regenerative operation based on the current detected by the current detection device 11 when it is not during a power failure. Instead, as described in the above-described embodiments, it may be determined whether the power running operation or the regenerative operation is performed based on the direction of the current commanded from the voltage control device 14, or the motor current detection device. Whether the power running operation or the regenerative operation is being performed may be determined based on the direction of the current detected by 43, or the power running operation may be performed based on the direction indicated by the current command from the speed control device 45. It may be determined whether the vehicle is in regenerative operation.

  The present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be omitted from all the components shown in the embodiment. Furthermore, you may combine suitably the component covering different embodiment.

The figure which shows the outline of a structure of the elevator according to the 1st Embodiment of this invention. The figure which shows the classification of the operation | movement of the elevator according to the 1st Embodiment of this invention in a table form. The figure which shows the outline of a structure of the elevator according to the 2nd Embodiment of this invention. The figure which shows the classification of the operation | movement of the elevator according to the 2nd Embodiment of this invention with a table form. The figure which shows the outline of a structure of the elevator according to the 3rd Embodiment of this invention. The figure which shows the classification | category of the operation | movement of the elevator according to the 3rd Embodiment of this invention in a table format. The figure which shows the outline of a structure of the elevator according to the 4th Embodiment of this invention. The figure which shows the classification of the operation | movement of the elevator according to the 4th Embodiment of this invention in a table format. The figure which shows the outline of a structure of the elevator according to the 5th Embodiment of this invention. The figure which shows the classification of the operation | movement of the elevator according to the 5th Embodiment of this invention in a table format. The figure which shows the outline of a structure of the elevator according to the 6th Embodiment of this invention. The figure which shows the outline of a structure of the conventional elevator.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1,101 ... Customer power supply, 2,102 ... Converter device, 3,103 ... DC capacitor, 4,104 ... Inverter device, 5,105 ... Electric motor, 6,106 ... Current detector, 7, 107 ... Sheave, 8 , 108 ... Car, 9, 109 ... Counterweight, 11, 111 ... Current detection device, 12, 112 ... Current control device, 13, 113 ... DC voltage command device, 14, 114 ... Voltage control device, 15, 115 ... DC voltage detection device, 21, 121 ... power storage device, 22a ... charging switching element, 22b ... discharging switching element, 23 ... DC reactor, 24 ... charge / discharge circuit, 25, 123 ... storage voltage control device, 26, 111 ... Power failure detection circuit, 41 ... motor current detector, 42 ... motor current control device, 43 ... motor current detection device, 44 ... speed detection device, 45 ... speed control Device, 46 ... speed command device, 51 ... power / regeneration determination device, 61 ... storage voltage limit setting device, 100 ... storage voltage converter.

Claims (1)

A converter device that converts an AC voltage from an external AC power source into a DC voltage;
A smoothing capacitor for smoothing the pulsation of the DC voltage converted by the converter device;
An inverter that converts the smoothed DC voltage into an AC voltage of variable voltage and variable frequency and outputs the AC voltage;
An electric motor driven by the alternating voltage output from the inverter device to raise and lower the car;
A power storage device for storing electric power;
A current detection device for detecting the direction of current on the AC input side of the converter device;
Discriminating means for discriminating whether the electric motor is in a power running operation or a regenerative operation based on the direction of the current detected by the current detection device;
A power failure detection device for detecting a power failure of the external AC power source;
When the determination means determines that the motor is in power running operation or when the power failure detection device detects a power failure, the power stored in the power storage device is supplied to the inverter device, and during the regenerative operation of the motor An elevator comprising: a storage voltage control unit that charges regenerative power to the power storage device when the determination unit determines that there is one.

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