Elevator device and method for controlling same

An elevator device and a method for controlling the same

This invention relates to an elevator device with which an accumulating electricity device stores electricity regeneration electric power at the time of regeneration operation of a loop wheel machine, and electric power which it stored electricity is supplied to a loop wheel machine at the time of power running operation, and a method for controlling the same.

In the conventional elevator device, direct-current electric power which exchange electric power outputted from commercial power of a three phase alternating current was transformed into direct-current electric power by converter, and was changed by a converter is transformed into exchange electric power of a variable voltage variable frequency by inverter, and exchange electric power from an inverter is supplied to a loop wheel machine.

Generally, when basket load raises [that basket load drops a basket in the no-load state, and] a basket in the state of rated load, operational status of a loop wheel machine serves as power running operation operated while consuming electric power. On the contrary, when basket load drops [that basket load raises a basket in the no-load state, and] a basket in the state of rated load, operational status of a loop wheel machine serves as regeneration operation which returns speed energy to electric power.

In order to use such regeneration electric power effectively, in a control device of the conventional elevator, an accumulating electricity device stores electricity direct-current electric power from the smoothing circuit unit between a converter and an inverter at the time of regeneration operation. And accumulated direct-current electric power is supplied to the smoothing circuit unit at the time of power running operation. As an accumulating electricity device, a nickel hydride storage battery is used, for example (for example, refer to patent documents 1).

A control device of an elevator using an electrical double layer capacitor (EDLC) as an accumulating electricity device is proposed. As compared with rechargeable batteries, such as a lithium ion battery, EDLC is long-life and rapid charge and discharge are possible for it.

Usually, EDLC is used as an in-series object which connected two or more capacitor cells in series. And in order to equalize voltage of each capacitor cell at the time of charge and discharge, balance resistance is connected to each capacitor cell in parallel. For this reason, power consumption in balance resistance becomes large, and self-electric discharge electric power on appearance becomes large.

It depends for a life of an electrical double layer capacitor on both-ends voltage, and a life will become short if both-ends voltage goes up. On the other hand, in a control device of other conventional elevators, electric power of an electrical double layer capacitor is discharged by regeneration resistance in an operation inactive time zone (for example, refer to patent documents 2).

<p><patcit num="1"><text>JP, 2002-145543, A</text></patcit><patcit num="2"><text>JP, 2011-213422, A</text></patcit></p>

<p num="0009">In a control device of the conventional elevator using the above EDLC (s), if it stores electricity many electric power for regeneration operation continuously since accumulation-of-electricity electric power and EDLC voltage serve as proportionality relation mostly, high voltage will be maintained, a capacity fall by degradation will advance, and an exchange cycle will become early. If electric power which it stored electricity is discharged to regeneration resistance in an operation inactive time zone, a part of regeneration electric power will become useless, and an energy saving effect will fade.</p><p num="0010">This invention is made in order to solve the above subjects, and an object of an invention is to acquire an elevator device which can raise energy-saving nature, and a method for controlling the same, using regeneration electric power more effectively, attaining reinforcement of a capacitor type accumulating electricity device.</p>

<p num="0011">While an elevator device concerning this invention stores electricity regeneration electric power at the time of regeneration operation of a loop wheel machine and a loop wheel machine which makes it go up and down a basket and a basket, A capacitor type accumulating electricity device which supplies electric power which it stored electricity to a loop wheel machine at the time of power running operation of a loop wheel machine, It is apparatus other than a loop wheel machine, and has an accumulation-of-electricity power supply control part which controls supply to power consumption apparatus of electric power of an accumulating electricity device according to at least one power consumption apparatus which consumes electric power, and operational status of a loop wheel machine and residual accumulation-of-electricity electric power of an accumulating electricity device. An elevator device concerning this invention is while storing electricity regeneration electric power at the time of regeneration operation of a loop wheel machine and a loop wheel machine which makes it go up and down a basket and a basket, A capacitor type accumulating electricity device which supplies electric power which it stored electricity to a loop wheel machine at the time of power running operation of a loop wheel machine, At least one power consumption apparatus which is apparatus other than a loop wheel machine, and consumes electric power, It is provided between the 1st voltage conversion parts and an accumulating electricity device which are formed between an accumulating electricity device and a loop wheel machine, and power consumption apparatus, It responds to the 2nd voltage conversion parts with conversion efficiency equivalent to the 1st voltage conversion parts, and residual accumulation-of-electricity electric power of an accumulating electricity device, It has an accumulation-of-electricity power supply control part which controls supply to power consumption apparatus of electric power of an accumulating electricity device, and a threshold of voltage of an accumulating electricity device is set to an accumulation-of-electricity power supply control part, and an accumulation-of-electricity power supply control part will permit supply to power consumption apparatus of electric power of an accumulating electricity device, if voltage of an accumulating electricity device becomes more than a threshold. A control method of an elevator device concerning this invention, While a capacitor type accumulating electricity device stores electricity regeneration electric power at the time of regeneration operation, Electric power which it stored electricity is the control method of an elevator device supplied to a loop wheel machine at the time of power running operation, and it supplies electric power which an accumulating electricity device stored electricity according to operational status of a loop wheel machine, and residual accumulation-of-electricity electric power of an accumulating electricity device also to at least one power consumption apparatus which consumes electric power except a loop wheel machine.</p>

<p num="0012">An elevator device and a method for controlling the same of this invention, It can raise energy-saving nature, using regeneration electric power more effectively, attaining reinforcement of a capacitor type accumulating electricity device, since electric power which an accumulating electricity device stored electricity is supplied also to power consumption apparatus other than a loop wheel machine according to residual accumulation-of-electricity electric power of not only a loop wheel machine but an accumulating electricity device.</p>

<figref num="1">It is a lineblock diagram showing an elevator device by this embodiment of the invention 1.</figref><figref num="2">It is an explanatory view showing conditions of supply to an elevator control device of accumulation-of-electricity electric power set as an electric discharge deciding part of Drawing 1.</figref><figref num="3">It is a graph which shows time change of electric power of a loop wheel machine at the time of a loop wheel machine of Drawing 1 shifting to hibernation from a stop state, voltage of an accumulating electricity device, and a driving state of the 2nd voltage conversion parts.</figref><figref num="4">It is a graph which shows time change of electric power of a loop wheel machine in case operational status of a loop wheel machine of Drawing 1 shifts in order of a stop, regeneration operation, a stop, power running operation, and a stop, voltage of an accumulating electricity device, and a driving state of the 2nd voltage conversion parts.</figref>

Hereinafter, a form for carrying out this invention is explained with reference to drawings. Embodiment 1. Drawing 1 is a lineblock diagram showing an elevator device by this embodiment of the invention 1. In a figure, basket 1 and balance weight 2 are hung in a hoistway with suspension object 3, and go up and down inside of a hoistway with loop wheel machine 4. As suspension object 3, two or more ropes or two or more belts are used. Weight of balance weight 2 is set up to balance with basket 1 for example, when basket load is a half (Half*Load) of rated load (Full*Load).

Loop wheel machine 4 has drive sheave 5 around which suspension object 3 was wound almost, loop wheel machine motor 6 made to rotate drive sheave 5, and a loop wheel machine brake (not shown) which brakes rotation of drive sheave 5.

Loop wheel machine motor 6 is connected to commercial power 10 for power via converter part 7, smoothing circuit unit 8, and inverter part 9. Converter part 7 transforms into direct-current electric power exchange electric power outputted from commercial power 10. Smoothing circuit unit 8 has smoothing capacitor 8a, and smooths direct-current electric power changed by converter part 7. Inverter part 9 transforms into three phase alternating current electric power for a drive of loop wheel machine motor 6 direct-current electric power obtained by smoothing circuit unit 8.

Inverter part 9 is controlled by elevator control device 11. Elevator control device 11 controls operation of loop wheel machine 4. Electric power from commercial power 12 for control is supplied to elevator control device 11. That is, elevator control devices 11 are apparatus other than loop wheel machine 4, and are power consumption apparatus which consumes electric power.

In this example, converter part 7, smoothing circuit unit 8, inverter part 9, and elevator control device 11 are formed in common operator control panel 13.

Regeneration electric power processing unit 14 is connected to smoothing circuit unit 8. Accumulating electricity device 15, the 1st voltage conversion parts 16, the 2nd voltage conversion parts 17, accumulation-of-electricity power supply control part 18, and bus line capacitor 19 are formed in regeneration electric power processing unit 14.

Accumulating electricity device 15 supplies electric power which it stored electricity to loop wheel machine 4 at the time of power running operation of loop wheel machine 4 while storing electricity regeneration electric power at the time of regeneration operation of loop wheel machine 4. A capacitor type thing is used as accumulating electricity device 15. In this example, an electrical double layer capacitor (EDLC) is used as an accumulation-of-electricity element of accumulating electricity device 15.

The 1st voltage conversion parts 16 are provided between accumulating electricity device 15 and smoothing circuit unit 8. That is, accumulating electricity device 15 is connected to smoothing circuit unit 8 via the 1st voltage conversion parts 16. As the 1st voltage conversion parts 16, a bidirectional DC-DC converter is used, for example.

Bus line capacitor 19 is formed between the 1st voltage conversion parts 16 and smoothing circuit unit 8. Voltage of accumulating electricity device 15 is lower than voltage of bus line capacitor 19. When the 1st voltage conversion parts 16 supply electric power from accumulating electricity device 15 to loop wheel machine 4, they carry out 昇 pressure of the voltage to voltage suitable for a motor power supply.

Electric power which accumulating electricity device 15 stored electricity is supplied also to elevator control device 11 via the 2nd voltage conversion parts 17. When the 2nd voltage conversion parts 17 supply electric power which accumulating electricity device 15 stored electricity to elevator control device 11, they transform the voltage into voltage somewhat higher than voltage of commercial power 12. Thereby, electric power from accumulating electricity device 15 has priority over electric power from commercial power 12, and is supplied to elevator control device 11. In this example, conversion efficiency of the 1st voltage conversion parts 16 is higher than efficiency of the 2nd voltage conversion parts 17.

Electric power from commercial power 12 for control is supplied to accumulation-of-electricity power supply control part 18. That is, accumulation-of-electricity power supply control parts 18 are apparatus other than loop wheel machine 4, and are power consumption apparatus which consumes electric power. When supplying electric power which accumulating electricity device 15 stored electricity to elevator control device 11, a part of the electric power is supplied to accumulation-of-electricity power supply control part 18.

Accumulation-of-electricity power supply control part 18 has the 1st voltage detector 20, 2nd voltage detector 21, and electric discharge deciding part 22. The 1st voltage detector 20 detects voltage of accumulating electricity device 15. The 2nd voltage detector 21 detects voltage of smoothing circuit unit 8.

A detection signal from the 1st and 2nd voltage detectors 20 and 21 is inputted into electric discharge deciding part 22. An elevator starting signal is inputted into electric discharge deciding part 22 from elevator control device 11 information about operational status (operational status of an elevator device) of loop wheel machine 4, and here.

Electric discharge deciding part 22 judges under operation of loop wheel machine 4 and a pause by receiving an elevator starting signal from elevator control device 11. Electric discharge deciding part 22 judges it as in power running operation, when voltage of smoothing circuit unit 8 measured by the 2nd voltage conversion parts 17 judges it as in regeneration operation when going up rather than voltage at the time of a stop of basket 1, and it is falling rather than voltage at the time of a stop of basket 1 during operation of loop wheel machine 4.

Electric discharge deciding part 22 controls the 1st voltage conversion parts 16 to discharge electric power which accumulating electricity device 15 stored electricity in smoothing circuit unit 8 at the time of power running operation while charging electric power which flows into smoothing circuit unit 8 from loop wheel machine 4 at the time of regeneration operation at accumulating electricity device 15.

Electric discharge deciding part 22 determines whether supply electric power which accumulating electricity device 15 stored electricity according to operational status of loop wheel machine 4, and residual accumulation-of-electricity electric power of accumulating electricity device 15 to elevator control device 11 and accumulation-of-electricity power supply control part 18 self, and controls a drive and a stop of the 2nd voltage conversion parts 17. That is, electric discharge deciding part 22 controls supply to elevator control device 11 of electric power and accumulation-of-electricity power supply control part 18 self which accumulating electricity device 15 stored electricity according to operational status of loop wheel machine 4, and residual accumulation-of-electricity electric power of accumulating electricity device 15. A computer which has CPU and a memory can constitute electric discharge deciding part 22.

Drawing 2 is an explanatory view showing conditions of supply to elevator control device 11 of accumulation-of-electricity electric power set as electric discharge deciding part 22 of Drawing 1. Electric power stored in accumulating electricity device 15 is supplied to elevator control device 11 and regeneration electric power processing unit 14 self by driving the 2nd voltage conversion parts 17 by the control instructions from electric discharge deciding part 22.

Electric discharge deciding part 22 judges any of a pause, a stop, regeneration operation, and power running operation operational status of loop wheel machine 4 is. Electric discharge deciding part 22 judges residual accumulation-of-electricity electric power of accumulating electricity device 15 based on voltage of accumulating electricity device 15. Electric power which EDLC stored electricity is proportional to the square of voltage as a lower type, and it is because capacitor voltage V becomes high, so that this has much electric power E which it stored electricity. C is electric capacity. E=CV²/2

A threshold of voltage of accumulating electricity device 15 is set to electric discharge deciding part 22 every four above-mentioned operational status. That is, the 1st thru/or the 4th threshold are set up respectively corresponding to a pause, a stop, regeneration operation, and power running operation. And electric discharge deciding part 22 will drive permission, i. e., the 2nd voltage conversion parts 17, for electric discharge to elevator control device 11 and accumulation-of-electricity power supply control part 18 from accumulating electricity device 15, if voltage of accumulating electricity device 15 becomes more than a threshold corresponding to operational status of loop wheel machine 4 at that time.

At the time of a pause of loop wheel machine 4 (at the time of a plant shutdown of an elevator device), electric discharge deciding part 22 drives the 2nd voltage conversion parts 17, when voltage of accumulating electricity device 15 is more than the 1st threshold, and specifically, it stops the 2nd voltage conversion parts 17 to a case of less than the 1st threshold. It is preferred for the 1st threshold to make into the fully acceptable minimum voltage regeneration electric power which occurs at the time of power running operation in consideration of current upper limit of accumulating electricity device 15.

At the times of a stop of loop wheel machine 4, such as at for example, the time of door opening closed, etc., electric discharge deciding part 22 drives the 2nd voltage conversion parts 17, when voltage of accumulating electricity device 15 is more than the 2nd threshold, and it stops the 2nd voltage conversion parts 17 to a case of less than the 2nd threshold. It is preferred for it that below voltage that fulfills a designed value of a life of accumulating electricity device 15 carries out while making the 2nd threshold more than the 1st threshold.

At the time of regeneration operation, electric discharge deciding part 22 drives the 2nd voltage conversion parts 17, when voltage of accumulating electricity device 15 is more than the 3rd threshold, and it stops the 2nd voltage conversion parts 17 to a case of less than the 3rd threshold. In order to accept as much regeneration electric power as possible, it is preferred for it to set up low, while making the 3rd threshold more than the 1st threshold.

At the time of power running operation, electric discharge deciding part 22 drives the 2nd voltage conversion parts 17, when voltage of accumulating electricity device 15 is more than the 4th threshold, and it stops the 2nd voltage conversion parts 17 to a case of less than the 4th threshold again. It is preferred for the 4th threshold to use more than the 1st threshold. Since the 4th threshold makes it discharge positively by the 1st voltage conversion parts 16 with high conversion efficiency, it is preferred for it to set up highly. However, it is desirable that below voltage that fulfills a designed value of a life of accumulating electricity device 15 carries out.

In the 2nd threshold and 4th threshold, it is preferred to consider it as voltage below voltage which fulfills a designed value of a life of accumulating electricity device 15 to aim at an electric-power-demand-load-peak cut at the time of power running operation.

Drawing 3 shows a graph which shows time change of electric power (upper row) of loop wheel machine 4 at the time of loop wheel machine 4 of Drawing 1 shifting to hibernation from a stop state, voltage (middle) of accumulating electricity device 15, and a driving state (lower berth) of the 2nd voltage conversion parts 17. In Drawing 3, since basket 1 has stopped, electric power of loop wheel machine 4 is still 0 with a full time belt.

Basket 1 is stopping a time zone by time t1, and voltage (EDLC voltage) of accumulating electricity device 15 is more than the 2nd threshold. For this reason, the 2nd voltage conversion parts 17 drive and electric power of accumulating electricity device 15 is discharged by elevator control device 11 and regeneration electric power processing unit 14. Thereby, voltage of accumulating electricity device 15 falls with time.

If time t2 comes, while loop wheel machine 4 has been under stop, in less than the 2nd threshold, voltage of accumulating electricity device 15 will become. For this reason, the 2nd voltage conversion parts 17 are stopped and electric discharge to elevator control device 11 and regeneration electric power processing unit 14 of electric power of accumulating electricity device 15 is stopped.

However, although voltage of accumulating electricity device 15 after time t2 is visible to a steady value by a diagram for a short time, it is falling gradually by self-electric discharge of accumulating electricity device 15. Electric power from commercial power 12 is supplied to elevator control device 11 and regeneration electric power processing unit 14.

Then, in time t2, loop wheel machine 4 will be in hibernation. And since voltage of accumulating electricity device 15 is more than the 1st threshold, the 2nd voltage conversion parts 17 drive again, and electric power of accumulating electricity device 15 is discharged by elevator control device 11 and regeneration electric power processing unit 14. Thereby, voltage of accumulating electricity device 15 falls with time.

If time t3 comes, while loop wheel machine 4 has been under pause, in less than the 1st threshold, voltage of accumulating electricity device 15 will become. For this reason, the 2nd voltage conversion parts 17 are stopped, electric discharge to elevator control device 11 and regeneration electric power processing unit 14 of electric power of accumulating electricity device 15 is stopped, and a fall of voltage of accumulating electricity device 15 is controlled.

Drawing 4 shows a graph which shows time change of electric power (upper row) of loop wheel machine 4 in case operational status of loop wheel machine 4 of Drawing 1 shifts in order of a stop, regeneration operation, a stop, power running operation, and a stop, voltage (middle) of accumulating electricity device 15, and a driving state (lower berth) of the 2nd voltage conversion parts 17. A value with negative electric power of loop wheel machine 4 shows regeneration electric power, and a positive value shows power running electric power.

Basket 1 is stopping a time zone by time t4, and voltage of accumulating electricity device 15 is less than the 2nd threshold. For this reason, the 2nd voltage conversion parts 17 are stopped and electric discharge to elevator control device 11 and regeneration electric power processing unit 14 of electric power of accumulating electricity device 15 is stopped.

If time t4 comes, loop wheel machine 4 will start regeneration operation, but since voltage of accumulating electricity device 15 is less than the 3rd threshold, it is stopped by the 2nd voltage conversion parts 17. For this reason, accumulating electricity device 15 stores electricity regeneration electric power by the 1st voltage conversion parts 16, and voltage of accumulating electricity device 15 rises.

Since voltage of accumulating electricity device 15 will become more than the 3rd threshold if time t5 comes, the 2nd voltage conversion parts 17 drive. Thereby, electric power of accumulating electricity device 15 is discharged by elevator control device 11 and regeneration electric power processing unit 14, accumulating electricity device 15 storing electricity regeneration electric power. For this reason, an increasing rate of voltage of accumulating electricity device 15 becomes smaller than a time zone in front of time t5.

Since voltage of accumulating electricity device 15 is more than the 2nd threshold when loop wheel machine 4 stops at time t6, a drive of the 2nd voltage conversion parts 17 is continued, and voltage of accumulating electricity device 15 falls.

In time t7, loop wheel machine 4 starts power running operation. Since voltage of accumulating electricity device 15 is more than the 4th threshold at this time, a drive of the 2nd voltage conversion parts 17 is continued. In this state, since electric power of accumulating electricity device 15 is discharged by both 1st and 2nd voltage conversion parts 16 and 17, voltage of accumulating electricity device 15 falls rapidly.

However, since the 2nd voltage conversion parts 17 will be stopped and only the 1st voltage conversion parts 16 will serve as electric discharge operation if voltage of accumulating electricity device 15 becomes at time t8 in less than the 4th threshold, a decreasing rate of voltage of accumulating electricity device 15 becomes smaller than time t8 before.

Then, since voltage of accumulating electricity device 15 is less than the 2nd threshold when loop wheel machine 4 stops at time t9, the 2nd voltage conversion parts 17 are having stopped with as.

Here, as for EDLC, according to the Arrhenius rule, electric capacity falls like an electrolytic condenser. That is, a decreasing rate of electric capacity C increases, so that voltage V is high. A fall of electric capacity will reduce a capacity factor of regeneration electric power at the time of power running operation. In order to prevent a fall of such electric capacity, it is effective to maintain voltage of EDLC low.

Upper limit voltage which considered that a life of EDLC fulfilled a set-up product life using the Arrhenius rule can be counted backward. Generally, as for upper limit voltage in consideration of a life, below rated voltage becomes.

To EDLC, it is possible to send current of infinite size theoretically. However, in a cable which connects EDLC, and apparatus which controls EDLC, maximum current which can be sent is determined in fact. That is, EDLC can charge energy determined by a product of maximum current and EDLC voltage.

Minimum voltage of EDLC is determined so that the maximum regeneration electric power of an elevator device can be charged. And charge and discharge are carried out between rated voltage from minimum voltage. When minimum voltage of EDLC is not enough, all electric power at the time of regeneration operation of an elevator cannot be charged, but a capacity factor of regeneration electric power falls at the time of power running operation.

In an elevator device of Embodiment 1, at the time of regeneration operation, regeneration electric power is charged by accumulating electricity device 15 via the 1st voltage conversion parts 16, and electric power of accumulating electricity device 15 is discharged via the 1st voltage conversion parts 16 to inverter part 9 at the time of power running operation. Chargeable and dischargeable voltage (it is a chargeable and dischargeable voltage range by the 1st voltage conversion parts 16) of EDLC is more than minimum voltage, and, as for less than rated voltage, is carried out.

In addition, when voltage of accumulating electricity device 15 is more than a threshold, the 2nd voltage conversion parts 17 drive and electric power which accumulating electricity device 15 stored electricity is discharged as a control source. A threshold is more than the above-mentioned minimum voltage, and is set below to upper limit voltage in consideration of a life.

As mentioned above, when conversion efficiency of the 2nd voltage conversion parts 17 is lower than conversion efficiency of the 1st voltage conversion parts 16, a different threshold according to operational status of loop wheel machine 4 is set up. namely, a case of efficiency of the efficiency &lt; 1st voltage conversion parts 16 of the 2nd voltage conversion parts 17 -- the [minimum voltage &lt;=] -- the [of one / threshold &lt;] -- the [of three / threshold &lt;] -- the [of two / threshold &lt;] -- it becomes the upper limit voltage in consideration of a threshold &lt;= life of four.

By using such an accumulation-of-electricity power supply control part 18, electric power which accumulating electricity device 15 stored electricity is positively discharged by the 2nd voltage conversion parts 17 at the time of a pause of loop wheel machine 4.

At the time of regeneration operation, regeneration electric power from loop wheel machine 4 is charged by accumulating electricity device 15 via the 1st voltage conversion parts 17. At this time, an increasing rate of EDLC voltage at the time of regeneration operation is controlled by discharging positively by the 2nd voltage conversion parts 17. Since quantity of the regeneration electric power which occurs to one run of basket 1 by discharging by the 2nd voltage conversion parts 17 which can be charged increases, a capacity factor of regeneration electric power can be made to increase.

At the time of a stop, electric discharge power running operation may be started immediately after and according to the 1st voltage conversion parts 16 in that case is more efficient than electric discharge by the 2nd voltage conversion parts 17 (when efficiency of the 1st voltage conversion parts 16 is higher than efficiency of the 2nd voltage conversion parts 17). For this reason, electric discharge by the 2nd voltage conversion parts 17 at the time of a stop is carried out to to voltage higher than minimum voltage, and thereby, when power running operation is started, it can leave electric power for discharging by the 1st voltage conversion parts 16.

At the time of power running operation, electric discharge by the 1st voltage conversion parts 16 is more efficient than electric discharge by the 2nd voltage conversion parts 17 again (when efficiency of the 1st voltage conversion parts 16 is higher than efficiency of the 2nd voltage conversion parts 17). For this reason, electric discharge by the 2nd voltage conversion parts 17 is considered as a case more than upper limit voltage in consideration of a life. Thereby, regeneration electric power can be used more efficiently, attaining reinforcement of accumulating electricity device 15.

Since electric power of accumulating electricity device 15 is supplied to elevator control device 11 and accumulation-of-electricity power supply control part 18 in such an elevator device according to operational status of loop wheel machine 4, and residual accumulation-of-electricity electric power of accumulating electricity device 15, Energy-saving nature can be raised using regeneration electric power more effectively attaining reinforcement of capacitor type accumulating electricity device 15.

Since accumulation-of-electricity electric power of accumulating electricity device 15 is positively discharged as a control source at the time of a pause of loop wheel machine 4, before being lost in self-electric discharge, specifically, accumulation-of-electricity electric power can be used effectively. It is since accumulation-of-electricity electric power of accumulating electricity device 15 is positively discharged as a control source also at the time of regeneration operation, Since charge possible capacity increases by electric discharge also when capacity of accumulating electricity device 15 has a maximum while being able to use accumulation-of-electricity electric power effectively as a control source, it becomes possible to charge more regeneration electric power, and total energy-saving nature improves.

According to residual accumulation-of-electricity electric power of accumulating electricity device 15, in consideration of the degradation characteristic over accumulation-of-electricity electric power of EDLC, residual accumulation-of-electricity electric power of EDLC can be controlled by determining a drive of the 2nd voltage conversion parts 17, and a stop, and reinforcement of EDLC can be attained.

The characteristic of a life or rapid charge and discharge can be raised by using EDLC as an accumulation-of-electricity element of accumulating electricity device 15.

It determines that a threshold (the 1st threshold) of hibernation of loop wheel machine 4 will use for a control source positively electric power lost in self-electric discharge, and it is determined again that thresholds other than hibernation of loop wheel machine 4 will control accumulation-of-electricity electric power for reinforcement of EDLC. Thereby, improvement in an energy saving effect by a measure against self-electric discharge of EDLC and reinforcement of EDLC can be attained.

A threshold at the time of regeneration operation (the 3rd threshold) is determined so that more regeneration electric power can be stored electricity, and when a threshold at the time of power running operation (the 4th threshold) has efficiency of the 2nd voltage conversion parts 17 lower than efficiency of the 1st voltage conversion parts 16, it determines to give priority to electric discharge by the 1st voltage conversion parts 16. Thereby, an increase in the amount of accumulation of electricity of regeneration electric power and further improvement in an energy saving effect by efficient electric discharge can be aimed at with reinforcement of EDLC.

Since it is not based on operational status of loop wheel machine 4 but electric power is stably consumed, although elevator control device 11 of power consumption is small compared with loop wheel machine 4, It is stabilized and electric discharge from accumulating electricity device 15 can be permitted to discharge accumulation-of-electricity electric power of accumulating electricity device 15 by choosing elevator control device 11 as power consumption apparatus.

Since electric power from accumulating electricity device 15 was supplied also to accumulation-of-electricity power supply control part 18 self, energy-saving nature can further be raised again.

It is although conversion efficiency of the 1st voltage conversion parts 16 is set up in the above-mentioned example more highly than conversion efficiency of the 2nd voltage conversion parts 17, Conversion efficiency of the 2nd voltage conversion parts 17 is made higher than conversion efficiency of the 1st voltage conversion parts 16, and it may be made to consume positively regeneration electric power which it stored electricity except loop wheel machine 4. the [in this case, / minimum voltage &lt;=] -- the [of four / threshold &lt;] -- the [of two / threshold &lt;] -- the [of three / threshold &lt;] -- it can set to upper limit voltage in consideration of a threshold &lt;= life of one.

When conversion efficiency of the 2nd voltage conversion parts 17 and conversion efficiency of the 1st voltage conversion parts 16 are equivalent (it is the same or near), it may not be based on operational status of loop wheel machine 4, but one threshold may be set up. namely, a case of efficiency of the efficiency = 1st voltage conversion parts 16 of the 2nd voltage conversion parts 17 -- the [minimum voltage =] -- the [of one / threshold =] -- the [of two / threshold =] -- the [of three / threshold =] -- it becomes the upper limit voltage in consideration of a threshold &lt; life of four.

Thus, since a loss by conversion is equivalent whichever it discharges [of loop wheel machine 4 and elevator control device 11] accumulation-of-electricity electric power if conversion efficiency is equivalent, Energy-saving nature can be raised being able to perform electric discharge to elevator control device 11, and attaining reinforcement of accumulating electricity device 15, if it is not based on operational status but voltage of accumulating electricity device 15 reaches a threshold.

An accumulation-of-electricity element of accumulating electricity device 15 may not be limited to EDLC, and may be an other capacitor type element. In the above-mentioned example, although voltage of accumulating electricity device 15 was detected as residual accumulation-of-electricity electric power, residual accumulation-of-electricity electric power may be detected from time integration of current.

Power consumption apparatus other than loop wheel machine 4 which discharges accumulation-of-electricity electric power of accumulating electricity device 15 again, It may be not a thing limited to elevator control device 11 and accumulation-of-electricity power supply control part 18 but a guidance display for example, in a distribution power board in a lighting installation in a basket, an air-conditioner in a basket, a car stop, and basket 1 or a car stop, and basket 1, etc. Although accumulation-of-electricity electric power was distributed to two lines by the side of loop wheel machine 4 and elevator control device 11 and was discharged in the above-mentioned example, it may divide into three or more lines, and may discharge. In this case, it may be made to control three or more voltage conversion parts provided for every system by an accumulation-of-electricity power supply control part. In the above-mentioned example, although accumulation-of-electricity power supply control part 18 has been independent of elevator control device 11, an accumulation-of-electricity power supply control part may be provided in an inside of elevator control device 11.

A setup of weight of balance weight 2 is not limited to the above-mentioned example, and may be set up again to balance with basket 1, for example when basket load is smaller than a half of rated load. A type of an elevator device with which this invention is applied is not limited to a type of Drawing 1. For example, this invention is applicable to an elevator device of a machinery room レスエレ beta and 2:1 loping methods, an elevator device of a one shaft multi-car method, or a doubledeck elevator.