JP2002338151A - Elevator device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elevator device capable of effectively utilizing the regenerative power without increasing a capacity of a capacitor. SOLUTION: This elevator device is provided with a hoisting machine, a rope hung on the hoisting machine, a car 9 suspended from one side of the rope, a balance weight 10 suspended from the other side of the rope, and having a weight lighter than a weight of the car without passengers, a motor for driving the hoisting machine to vertically move the car 9, a rectifying means 3 for rectifying the AC power from a commercial power source 1 and outputting the DC power, a smoothening capacitor 4 for smoothening the DC power, an inverter 5 for inverting the smoothened DC power into the AC power of variable frequency and variable voltage, and supplying the same to the motor 6, an elevator controller 11 outputting a rotation control signal to the inverter 5, and the capacitor 14 connected to both end parts of the smoothening capacitor 4 for accumulating the regenerative power of the motor 6 and discharging the accumulated power in powering the car 9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention stores in a power storage device regenerative electric power generated when an elevator car moves up and down, and supplies necessary power in a control device during power running operation and during a power failure and in the car from the power storage device. The present invention relates to an elevator device.

[0002]

2. Description of the Related Art In general, a mainstream power supply main circuit of an elevator uses a voltage-type inverter for converting commercial AC power into AC power having a variable frequency and a variable voltage.

In this type of power supply main circuit, regenerative power generated from an elevator car motor for elevators raises the output (DC power) of rectification means of the main circuit via a diode included in an inverter. Are known.

Therefore, in a rectifier of a power supply main circuit in a conventional elevator apparatus, various configurations for preventing circuit destruction due to overvoltage of regenerative power have been proposed.
For example, a configuration is known in which power is consumed by a resistor when an output voltage of a rectifier in a power supply main circuit becomes equal to or higher than a set voltage.

There is also known a configuration in which a storage battery is connected to a rectifier of a power supply main circuit directly or via a converter, and power for driving an elevator car for elevators is supplied from the storage battery. Furthermore, as another conventional system, a configuration has been proposed in which a converter for converting DC power from rectifying means of a power supply main circuit into commercial power is added.

However, in a conventional elevator system,
The weight of the counterweight for offsetting the weight of the riding basket is set to a value equal to the total weight of the riding basket when the number of passengers reaches half of the capacity. It is heavier than the weight, and lighter than the car weight when the number of passengers is full.

Therefore, for example, when the full load down and no load up are repeated when the office building leaves the office, the weight of the riding car becomes heavier than the counterweight at full load down, and the counterweight rides at no load up. Since the weight of the car is heavier, the regenerative operation state is established in any case.

In the above-described regenerative operation repetition situation, according to the conventional elevator apparatus, it is necessary to increase the power storage capacity in order to store the regenerative electric power for the repetitive operation without waste. This leads to higher costs.

If the storage capacity of the elevator device is small, it will be fully charged immediately, so the regenerative power must be consumed as heat through a protection circuit such as a resistor, and the regenerative power is used without waste. It is not possible.

[0010]

As described above, in the conventional elevator apparatus, it is necessary to increase the power storage capacity in order to store the regenerative electric power without waste in the repetitive operation state of the regenerative operation. And lead to an increase in cost.

When the storage capacity is small, regenerative power that cannot be charged is consumed as heat in the protection circuit, and there is a problem that the regenerative power cannot be used without waste.

Further, in the case of a conventional apparatus for converting regenerative electric power into a commercial power supply via a converter, the power running electric power of the motor for raising and lowering the car cannot be supplied by the power storage device. , On a power contract,
There is a problem that it is often not possible to regenerate regenerative power to commercial power.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to provide an elevator apparatus that can effectively use regenerative power without increasing the capacity of a power storage device.

[0014]

An elevator apparatus according to the present invention comprises a hoist, a rope wound around the hoist, a riding basket suspended on one side of the rope, and a rope suspended on the other end of the rope. The number of passengers is zero, the counterweight is set to a lighter weight than the weight of the riding basket, the motor that drives the hoist to raise and lower the riding basket, and rectifies the AC power from the commercial power supply. Rectifying means for outputting DC power, a smoothing capacitor for smoothing DC power, an inverter for converting DC power smoothed by the smoothing capacitor into AC power of a variable frequency variable voltage and supplying the AC power to a motor, and a motor for the inverter. An elevator controller that outputs a rotation control signal of the motor, and a power storage device that is connected to both ends of the smoothing capacitor and stores the regenerative power of the motor and discharges the stored power during power running of the riding car. Those were example.

[0015] Further, the elevator apparatus according to the present invention comprises:
A winder-type hoist, a rope having one end connected to the winding drum of the winder-type hoist, a riding cage connected to the other end of the rope, and a riding cage driven by the winder-type hoist. A motor for raising and lowering the
Rectifying means for rectifying AC power from a commercial power supply and outputting DC power, a smoothing capacitor for smoothing DC power, and converting DC power smoothed by the smoothing capacitor into AC power of a variable frequency variable voltage to a motor. An inverter to be supplied, an elevator controller that outputs a rotation control signal of the motor to the inverter, and a power storage device that is connected to both ends of the smoothing capacitor to store the regenerative power of the motor and discharge the stored power when the riding basket is running. It is provided with.

Further, the rotation control signal of the elevator apparatus according to the present invention includes a speed signal, a forward rotation signal or a reverse rotation signal.

The power storage device of the elevator apparatus according to the present invention includes an electric double layer capacitor as the power storage means.

Further, the elevator controller of the elevator apparatus according to the present invention includes floor stop detecting means for detecting that the car has stopped between floors when a commercial power supply has failed, and has detected floor stop of the car. In this case, the ride car is driven down to stop at a predetermined floor.

[0019] Further, a power storage device of an elevator apparatus according to the present invention includes: a charge / discharge device connected to a smoothing capacitor;
Including a capacitor connected to the charging and discharging device, a transformer connected to the capacitor, and a semiconductor switch inserted in the primary winding of the transformer, the secondary winding of the transformer is a power source of the elevator controller, the inside of the charging and discharging device The semiconductor switch is connected to the power supply of the charge / discharge controller, and the power supply in the riding cage. The switching operation is performed so that the voltage required for the power supply in the car is obtained, and the storage power of the storage battery is discharged through the secondary winding.

Further, the power storage device of the elevator apparatus according to the present invention stores the regenerative power and discharges the stored power according to the rotation control signal.

Further, the power storage device of the power storage device of the elevator apparatus according to the present invention is connected to a current protection circuit connected to one end of a smoothing capacitor, and connected between one end of the current protection circuit and the other end of the smoothing capacitor. It includes a capacitor.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Hereinafter, Embodiment 1 of the present invention will be described in detail with reference to the drawings. FIG. 1 is a circuit diagram showing a first embodiment of the present invention. In FIG.
Is a main circuit for driving an elevator connected to the power supply.

The power supply main circuit 2 includes a rectifier 3 for rectifying AC power from the commercial power supply 1 and outputting DC power, a smoothing capacitor 4 for smoothing DC power from the rectifier 3, and a smoothing capacitor 4. And an inverter 5 for converting the converted DC power into AC power having a variable frequency and a variable voltage. As is well known, the inverter 5 includes a semiconductor switch, a diode, and the like.

Reference numeral 6 denotes an elevator driving motor connected to the inverter 5 in the power supply main circuit 2, reference numeral 7 denotes a reduction gear connected to the motor 6, and reference numeral 8 denotes a pulley connected to the motor 6 via the reduction gear 7. Hereinafter, it is referred to as “sheave”).

The speed reducer 7 and the sheave 8 constitute a hoisting machine driven by the motor 6. 9 is a riding basket suspended on one side of a rope wound around the sheave 8, and 10 is a counterweight suspended on the other side of the rope.

The counterweight 10 is set to have a lighter weight than its own weight (weight when the number of passengers is zero) of the riding basket 9. An elevator controller 11 controls the inverter 5 and a charge / discharge circuit (described later) while detecting the rotation state of the motor 6.

Reference numeral 12 denotes a charging / discharging circuit connected to both ends of the smoothing capacitor 4, and both terminals P0 of the smoothing capacitor 4
And N0, and connection terminals PB and NB for both terminals of a battery (to be described later).
And

Reference numeral 13 denotes a capacitor connected to the charging / discharging circuit 12, in which an electric double layer capacitor is used. Reference numeral 14 denotes a power storage device including a charging / discharging device 12 and a power storage device 13. The power storage device 14 stores the regenerative power of the motor 6 through both ends of the smoothing capacitor 4, and also stores the stored power during the powering of the riding basket 9. 4 discharges at both ends.

The elevator controller 11 has a motor 6
Output to the inverter 5 (including a speed signal, a forward rotation signal or a reverse rotation signal), and the inverter 5 converts the DC power through the smoothing capacitor 4 into AC power according to the rotation control signal, and 6

Thus, the motor 6 drives the sheave 8 via the speed reducer 7 to raise and lower the riding basket 9. The rotation control signal from the elevator controller 11 is also input to the charging / discharging device 12 in the power storage device 14, and the power storage device 14 stores the regenerative power and discharges the stored power according to the rotation control signal.

The elevator controller 11 also includes inter-story stop detecting means for detecting that the car 9 has stopped between floors when the commercial power supply 1 has lost power. , And has a function of driving the car 9 down to stop at a predetermined floor.

FIG. 2 is a circuit diagram specifically showing the charging / discharging device 12 in FIG. In FIG. 2, reference numeral 20 denotes a charge / discharge controller in the charge / discharge device 12, which is a DSP (CP
U), and performs charge / discharge control according to a rotation control signal from the elevator controller 11.

The charge / discharge controller 20 includes a rotation control signal, that is, a speed signal VEL and a start signal ST (including a reverse rotation signal), and both terminals P0-N0 of the smoothing capacitor 4.
A control signal is output based on the line voltage VC (see FIG. 1) and the charged amount VB of the battery 13 (represented by the voltage between the terminals PB and NB).

Reference numeral 21 denotes a first drive circuit (hereinafter simply referred to as “drive circuit”) controlled by the charge / discharge controller 20, and reference numeral 22 denotes a first semiconductor switch (hereinafter simply referred to as “semiconductor switch”) driven by the drive circuit 21. ")
Reference numeral 23 denotes a diode connected in antiparallel to the semiconductor switch 22.

Reference numeral 24 denotes a second drive circuit (hereinafter simply referred to as “drive circuit”) controlled by the charge / discharge controller 20, and 25 denotes a second semiconductor switch (hereinafter simply referred to as “semiconductor switch”) driven by the drive circuit 24. ")
Reference numeral 26 denotes a diode connected in antiparallel to the semiconductor switch 25.

Reference numeral 27 denotes a line voltage VC of the smoothing capacitor 4.
Is a voltage detecting means for detecting the power storage amount V of the power storage device 13.
It is a charged amount detecting means for detecting B.

FIG. 3 is a speed pattern waveform diagram showing an operation state according to the first embodiment of the present invention. The speed signal VEL and the start signal ST output from the elevator controller 11 and the amount of stored power accompanying the charging and discharging of the battery 13 are shown. VB
Are shown in association with each other.

Next, the operation according to the first embodiment of the present invention will be described with reference to FIGS. First,
The rectifier 3 in the power supply main circuit 2 rectifies the voltage of the commercial power supply 1 to a DC voltage, and the inverter 5 converts the DC voltage smoothed by the smoothing capacitor 4 into a drive voltage of a variable frequency variable voltage, Drive.

The motor 6 drives the sheave 8 at a required speed by the speed reduced through the speed reducer 7, and drives the riding basket 9 and the counterweight 10 connected to both ends of the rope wound around the sheave 8. Go up and down.

At this time, since the counterweight 10 is set to be lighter than the weight of the riding basket 9, the motor 6 is always in a power running operation state in which power is supplied from the power supply main circuit 2 when the riding basket 9 rises. When the riding basket 9 descends, the vehicle is always in a regenerative operation state in which power is regenerated to the power supply main circuit 2.

Here, the operation of the power storage device 14 when the riding basket 9 descends will be described. First, the regenerative electric power generated by the motor 6 when the riding basket 9 descends
Is rectified via a diode or the like, and charges the smoothing capacitor 4 so that both terminals P of the smoothing capacitor 4
The line voltage VC between 0 and N0 is increased.

Charge / discharge controller 2 in charge / discharge device 12
0 is the line voltage V detected by the voltage detecting means 27
When C reaches the predetermined value VC1 or more, a control signal is sent to the drive circuit 21 to drive the semiconductor switch 22 for switching, and the voltage between the terminals PC and NC is reduced while controlling so that VC = VC1. (The smoothing capacitor 4 is discharged) to charge the capacitor 13.

Next, when the line voltage VC falls below the predetermined value VC2, the charge / discharge controller 20 causes the drive circuit 21 to stop the switching of the semiconductor switch 22.

In this case, the charge / discharge controller 20 starts the charging of the battery 13 (discharging of the smoothing capacitor 4) when the line voltage VC has reached the predetermined value VC1 or more, as shown in FIG. Predetermined descending speed VEL3, VEL
4 may be controlled in response to the charge.

That is, the charging is started when the speed signal VEL from the elevator controller 11 becomes equal to or lower than the predetermined lowering speed VEL3 of the car 9 from zero (stop state), and the speed signal VEL is set to the maximum ( Negative direction)
The charging may be stopped when the falling speed becomes equal to or higher than the predetermined falling speed VEL4.

The start and stop of charging may be executed in response to a reverse signal of start signal ST shown in FIG.

On the other hand, during the power running operation when the riding basket 9 is lifted, the charge / discharge controller 20 controls the discharge of the battery 13. That is, the speed signal VEL of the motor 6 included in the rotation control signal from the elevator controller 11
Is a predetermined rising speed V of the car 9 from zero (stopped state).
If EL1 or more, the charge / discharge controller 20 outputs a control signal to the drive circuit 24 to switch the semiconductor switch 25.

As a result, the voltage between the terminals PB and NB is increased, and the line voltage V detected by the voltage detecting means 27 is increased.
The battery 13 is discharged through the diode 23 while controlling so that C (voltage between the terminals PC and NC) becomes a constant value.

Thereafter, if the charged amount VB detected by the charged amount detecting means 28 falls below the predetermined value VB1, or if the speed signal VEL falls from the maximum rising speed of the riding car 9 to below the predetermined rising speed VEL2. The charge / discharge controller 20 stops the switching of the drive circuit 24 and ends the discharge control of the battery 13.

Here, the predetermined value VB1, which is the lower limit of the charged amount VB, is set to a value corresponding to the minimum required charged amount as an emergency power supply at the time of a power failure. Here, the speed signal VEL is used as a condition for starting and stopping the discharge of the storage battery 13. However, instead of the speed signal VEL, a normal rotation signal included in the start signal ST from the elevator controller 11 may be used.

Further, the line voltage VC between the PC and the NC detected by the voltage detecting means 27 at the time of discharging is controlled to be constant, but the current between the PC and the NC is controlled to be constant (or variable according to the command value). Alternatively, the discharge power may be calculated from the voltage and the current between the PC and the NC, and the discharge power may be controlled to be constant (or variable according to the command value).

As described above, by setting the weight of the counterweight 10 to be lighter than the own weight of the riding basket 9,
When ascending, power running operation, when descending, regenerative operation,
Since charging and discharging are alternately repeated,
Requires a small capacity.

More specifically, the reduction ratio WC of the counterweight 10 when the loading capacity of the riding basket 9 is "1", and the mechanical efficiency, motor efficiency, inverter efficiency, charge / discharge circuit efficiency, power storage efficiency, etc. of the elevator. The relationship between the total charging (discharging) efficiency η in consideration of the above and the open energy Q when descending the full stroke of the up-and-down stroke at full load is expressed by the following equation (1).

(1 + WC) · Q · η ² = WC · Q (1)

In the equation (1), the left side represents the active power amount when all the regenerative power stored at the time of full load down at which the maximum regenerative power is generated is used for discharging, and the right side shows no load over the same distance as the down time. Represents the amount of power required when rising.

If the left side and the right side satisfy the same condition as in the equation (1), the storage capacity of the battery 13 can store the regenerative electric power when the entire stroke of the ascending and descending strokes is lowered at full load down. Only a small capacity is required.

In this case, the counterweight 10 is set to be lighter than the weight of the car 9 (the weight when the number of passengers is zero). Since the capacity is not exceeded, the capacity of the battery 13 can be reduced, and a protection circuit for consuming the excess power with a resistor or the like is not required, and the counterweight 10 can be reduced.

Further, by performing the discharge and power storage control of power storage device 14 in accordance with speed signal VEL (rotation control signal) output from elevator controller 11, power storage device 14 can be properly charged and discharged. .

When the car 9 stops between floors when the commercial power source 1 fails, the power of the emergency car at the time of power failure is reduced by lowering the car 9 to a predetermined floor to stop. Therefore, the installed capacity of the battery 13 can be reduced.

Further, by using an electric double layer capacitor as the battery 13 in the power storage device 14, the battery 13 can have a long life and can withstand a large current.

Although an electric double layer capacitor is used here as the battery 13, a similar effect can be obtained by using a secondary battery such as Ni-MH (nickel hydride). However, in this case, it is necessary to change the charged amount detecting means 28 for grasping the charged amount VB according to the type of the secondary battery in the battery 13.

Embodiment 2 In Embodiment 1, the discharge control is performed only from power storage device 14 to power supply main circuit 2, but the discharge control may be performed to another power supply circuit. Hereinafter, a second embodiment of the present invention in which discharge control can be performed from the power storage device 14 to another power supply circuit will be described in detail with reference to FIG.

FIG. 4 is a circuit diagram showing a second embodiment of the present invention. The same components as those described above (see FIG. 1) are denoted by the same reference numerals, or "A" is added after the reference numerals. The details will be omitted. The configuration of the charging / discharging device 12 in FIG. 4 is the same as that described above (see FIG. 2).

In FIG. 4, reference numeral 29 denotes a third drive circuit (hereinafter simply referred to as "drive circuit"), which is controlled by the elevator controller 11A. 30 is a drive circuit 29
(Hereinafter, simply referred to as “semiconductor switch”), and includes a diode connected in anti-parallel. One end of the semiconductor switch 30 is connected to the terminal N1 of the battery 13A.

Reference numeral 31 denotes a transformer. The primary winding of the transformer 31 is connected between the other end of the semiconductor switch 30 and the terminal N1 of the battery 13A. 32 and 33 are diodes inserted in the secondary winding of the transformer 31;
The cathodes of the diodes 32 and 33 are connected to a power supply in the car.

Next, the operation according to the second embodiment of the present invention shown in FIG. 4 will be described. In this case, the battery 13
The electric power stored in A is used not only in the power running operation of the elevator apparatus, but also as a controller power supply (power supply of the elevator controller 11A and the charge / discharge controller 20) during normal operation, and also as a power supply in the car.

First, the driving device 29 switches the semiconductor switch 30 so that the secondary side voltage of the transformer 31 becomes a voltage necessary for the controller power supply and the power supply in the car.

As a result, the switching operation of the semiconductor switch 30 induces a voltage required as a controller power supply and a power supply in the riding cage on the secondary side of the transformer 31.

The induced voltage on the secondary side of the transformer 31 is rectified by the diodes 32 and 33 to be a DC voltage, which is supplied to the controller power supply and the power supply in the car. At this time, if different voltages are required, a plurality of windings may be prepared on the secondary side of the transformer 31, as shown in FIG.

The weight setting conditions of the counterweight 10 include the efficiency η ₁ from the storage battery 13A to the controller power supply and the power supply in the riding car, and the power Q required for the controller power supply and the power supply in the riding car. ₁ and is represented by the following equation (2).

｛(1 + WC) · η · Q−Q ₁ / η ₁ ｝ · η = WC · Q + Q ₁ / η ₁ (2)

In the equation (2), the reduction ratio WC of the counterweight 10, the overall charging (discharging) efficiency η, and the opening energy Q
Is the same as in the above equation (1). By satisfying the above expression (2), the same operation and effect as those of the above (Embodiment 1) can be obtained, and the weight of the counterweight 10 can be made closer to the own weight of the riding basket 9. Can be further reduced as compared with the above (see FIG. 1).

As described above, since the electric power required for the controller power supply and the power supply in the riding car can be supplemented, further energy saving can be realized.

At the time of a power failure of the commercial power supply 1, upon receiving a power failure signal from the elevator controller 11A,
When the drive circuit 29 switches the semiconductor switch 30, the electric power of the battery 13 is used as a controller power supply and a power supply in the car via the transformer 31.

Therefore, the lighting in the car 9, the elevator controller 11 A and the charge / discharge controller 2
0 can also be driven.

Further, when the riding basket 9 stops between floors, it is operated to stop the riding basket 9 on the nearest floor while charging the battery 13 by the descending operation (regenerative operation). Even when used as a power source, the capacity of the battery 13 can be small.

As described above, the electric power stored in the electric storage device 13 is used not only for the power during the power running operation of the motor 6 but also for the riding basket 9.
Further, energy saving can be realized by utilizing the lighting in the interior and driving of the elevator controller 11A and the charge / discharge controller 20.

Further, when the commercial power source 1 fails, the car 9 moves in the regenerative operation (down) direction and stops at a predetermined floor, so that less power is required for emergency operation during a power failure. Equipment capacity can be reduced.

Embodiment 3 In the first embodiment,
In 2, the riding cage 9 is driven up and down using the sheave 8 around which the rope having the counterweight 10 is wound, but the riding basket 9 may be driven up and down using a winding drum type hoist. Hereinafter, a third embodiment of the present invention using a winding drum type hoist will be described in detail with reference to FIGS. 5 and 6.

FIG. 5 is a circuit diagram showing a winding drum type elevator apparatus according to Embodiment 3 of the present invention.
The same components as those described above (see FIG. 1) are denoted by the same reference numerals or are denoted by “B” after the reference numerals, and detailed descriptions thereof are omitted.

In FIG. 5, reference numeral 7B denotes a speed reducer of a winding type hoist, 8B denotes a winding drum corresponding to the sheave 8 described above (see FIGS. 1 and 4), 11B denotes an elevator controller, and a counterweight 10 ( (See FIG. 1) is the main difference from the above. One end of a rope is connected to the winding drum 8B, and a riding basket 9 is connected to the other end of the rope.

In this case, the rotation speed of the motor 6 is
B is transmitted to the winding drum 8B. The riding basket 9 rises when the rope is wound up by the rotation of the winding drum 8B, and falls when the rope is unwound.

At this time, since the counterweight 10 is not provided, the motor 6 is always in power running operation when the car 9 is raised, and is always in regenerative operation when it is lowered. Therefore, the powering operation and the regenerative operation (discharge and power storage of the power storage device 14) are repeated with the raising and lowering of the riding basket 9, so that the power storage capacity of the power storage device 13 is not reduced and the capacity of the power storage device 13 is reduced. Can be.

FIG. 6 is a circuit diagram showing another example of the third embodiment of the present invention, in which discharge control can be performed also for the controller power supply and the power supply in the riding car. In FIG. 6, the same components as those described above (see FIGS. 4 and 5) are denoted by the same reference numerals or are denoted by “C” after the reference numerals, and detailed descriptions thereof are omitted.

In this case, the electric power stored in the battery 13A can be used not only for the power running operation of the elevator apparatus but also for the controller power supply during normal operation and the power supply in the car. Switch 30
And a transformer 31.

It is needless to say that the configuration shown in FIG. 6 has the same operation and effect as the above (Embodiment 2).

Embodiment 4 In the third embodiment, the power storage devices 14 and 14A controlled by the elevator controller 11C are used. However, the charge / discharge device 12 is omitted, and the power storage device using the electric double layer capacitor is replaced with both terminals of the smoothing capacitor. It may be directly connected to P0 and N0.

Hereinafter, a fourth embodiment of the present invention will be described in detail with reference to FIG. FIG. 7 is a circuit diagram showing a winding drum type elevator apparatus according to a fourth embodiment of the present invention provided with a current protection circuit. Components similar to those described above (see FIG. 5) are denoted by the same reference numerals. Or “D” after the reference numeral, and the detailed description is omitted.

In FIG. 7, the elevator controller 1
1D controls only the inverter 5 in the power supply main circuit 2 according to the rotation state of the motor 6. 13D is an electric double layer capacitor functioning as a storage battery.
The regenerative electric power of the motor 6 is stored.

Reference numeral 36 denotes a current protection circuit for limiting the current, which is inserted between one end N0 of the smoothing capacitor 4 and one end N1 of the electric double layer capacitor 13D. The current protection circuit 36 acts to prevent an inrush current when there is a large potential difference between the voltage between the terminals of the electric double layer capacitor 13D and the voltage between the terminals of the smoothing capacitor 4 and the commercial power supply voltage.

In this case, first, when the car 9 descends, the motor 6 always generates regenerative power to increase the voltage between the terminals P0 and N0 of the smoothing capacitor 4. Thus, the terminals P1-N1 of the electric double layer capacitor 13D
A potential difference occurs between the voltage between the terminals and the voltage between the terminals P0 and N0 of the smoothing capacitor 4, and the regenerative power is charged in the electric double layer capacitor 13D. At this time, the current protection circuit 3
6 acts on the charging current to the electric double layer capacitor 13D so as not to be overcharged.

On the other hand, when the riding basket 9 is lifted, the motor 6 always consumes powering power and the smoothing capacitor 4
The voltage between the terminals PO and NO is decreased. This allows
A potential difference occurs between the voltage between the terminals P1 and N1 of the electric double layer capacitor 13D and the voltage between the terminals P0 and N0 of the smoothing capacitor 4, and the power running power is reduced by the electric double layer capacitor 1D.
Discharged from 3D. At this time, the current protection circuit 36
It acts to prevent overcurrent with respect to the discharge current from electric double layer capacitor 13D.

When the discharge proceeds and the voltage between the terminals P1 and N1 of the electric double layer capacitor 13D becomes lower than the commercial power supply voltage, the powering power is switched to the commercial power supply.

Thus, the electric double layer capacitor 13D
, The life of the battery becomes semi-permanent. In addition, since it has a configuration that can withstand a large current, there is no need to charge or discharge by raising or lowering the voltage between the smoothing capacitor 4 and the electric double layer capacitor 13D, as described above (FIGS. 1, 4 to 6). ) Can be omitted.

[0095] Here, the case of the winding drum type elevator apparatus has been described as an example, but as described above (see FIGS. 1 and 4), the counterweight 1 which is lighter than the weight of the riding car 9 is used.
It is needless to say that the present invention may be applied to a wrapping rope type elevator apparatus having zero and has the same operation and effect.

Further, as shown in FIG. 6, a DC power supply may be supplied as an emergency power supply using a transformer 31.

[0097]

As described above, according to the present invention, the hoist, the rope wound on the hoist, the riding basket suspended on one side of the rope, and the rope suspended on the other end of the rope are provided. A counterweight set to a weight lighter than the weight of the riding car when the number of passengers is zero, a motor that drives the hoist to move the car up and down, and a DC that rectifies AC power from commercial power Rectifying means for outputting power, a smoothing capacitor for smoothing DC power, an inverter for converting DC power smoothed by the smoothing capacitor to AC power of a variable frequency variable voltage and supplying the AC power to the motor, An elevator controller that outputs a rotation control signal, and a power storage device that is connected to both ends of the smoothing capacitor to store the regenerative power of the motor and discharge the stored power when the riding car is running power are provided. Without increasing the capacity of the device,
There is an effect that an elevator apparatus that can effectively use regenerative power can be obtained.

Further, according to the present invention, a winding drum type hoist, a rope having one end connected to the winding drum of the winding drum type hoist,
A riding basket connected to the other end of the rope, a motor that drives the winding drum type hoist to raise and lower the riding cage, a rectifying unit that rectifies AC power from a commercial power supply and outputs DC power,
A smoothing capacitor for smoothing the DC power, an inverter for converting the DC power smoothed by the smoothing capacitor into AC power of a variable frequency variable voltage and supplying the AC power to the motor, and an elevator controller for outputting a motor rotation control signal to the inverter And a power storage device connected to both ends of the smoothing capacitor for storing the regenerative power of the motor and discharging the stored power during power running of the riding basket, so that the regenerative power can be effectively used without increasing the capacity of the power storage device. This has the effect of obtaining an elevator device that can be used for a vehicle.

Further, according to the present invention, since the rotation control signal includes a speed signal, a forward rotation signal or a reverse rotation signal, charging and discharging of the power storage device can be controlled using the rotation control signal, and There is an effect that an elevator apparatus that can effectively use regenerative power without increasing the capacity is obtained.

Further, according to the present invention, since the power storage device includes the electric double layer capacitor as the power storage means, there is an effect that an elevator device having an extended service life of the power storage device can be obtained.

Further, according to the present invention, the elevator controller includes floor-to-floor stop detecting means for detecting that the riding car has stopped between floors when the commercial power supply has failed, and the elevator controller detects a floor stop of the riding car. In order to make the riding car descend and stop at the predetermined floor, even during an emergency operation such as a power outage, without increasing the capacity of the power storage device,
There is an effect that an elevator apparatus that can effectively use regenerative power can be obtained.

Further, according to the present invention, the power storage device includes a charging / discharging device connected to the smoothing capacitor, a power storage device connected to the charging / discharging device, and a transformer connected to the power storage device.
A semiconductor switch inserted in a primary winding of a transformer, a secondary winding of the transformer is connected to a power supply of an elevator controller, a power supply of a charge / discharge controller in a charge / discharge device, and a power supply in a riding car, Semiconductor switches
The switching operation is performed so that the voltage of the secondary winding of the transformer becomes the voltage required for the power supply of the elevator controller, the power supply of the charge / discharge controller in the charging / discharging device, and the power supply in the riding cage, and the secondary winding is operated. Since the power stored in the power storage device is discharged via the power storage device, there is an effect that an elevator device that can effectively use the power stored in the power storage device can be obtained.

Further, according to the present invention, since the power storage device performs the storage of the regenerative power and the discharge of the stored power in accordance with the rotation control signal, the charge / discharge of the power storage device is controlled using the rotation control signal. There is an effect that an elevator apparatus that can perform the operation is obtained.

According to the present invention, the power storage device includes the current protection circuit connected to one end of the smoothing capacitor and the power storage device connected between one end of the current protection circuit and the other end of the smoothing capacitor. In addition, there is an effect that an elevator apparatus capable of controlling charging and discharging of the power storage device in accordance with the potential difference between the voltage between the terminals of the smoothing capacitor and the voltage between the terminals of the battery is obtained.

[Brief description of the drawings]

FIG. 1 is a circuit configuration diagram showing Embodiment 1 of the present invention.

FIG. 2 is a circuit configuration diagram specifically showing the charge / discharge device in FIG.

FIG. 3 is a waveform diagram for explaining an operation state according to the first embodiment of the present invention.

FIG. 4 is a circuit configuration diagram showing Embodiment 2 of the present invention.

FIG. 5 is a circuit configuration diagram showing a third embodiment of the present invention.

FIG. 6 is a circuit configuration diagram showing another embodiment according to the third embodiment of the present invention.

FIG. 7 is a circuit configuration diagram showing a fourth embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Commercial power supply, 2 power supply main circuits, 3 rectifiers, 4 smoothing capacitors, 5 inverters, 6 motors, 8 sheaves, 8B winding drums, 9 riding baskets, 10 counterweights, 1
1, 11A, 11B elevator controller, 12
Charge / discharge device, 13, 13A power storage device, 13D electric double layer capacitor, 14, 14A power storage device, 36 current protection circuit.

 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Takashi Yumura 2-3-2 Marunouchi, Chiyoda-ku, Tokyo F-term in Mitsubishi Electric Corporation (reference) 3F002 AA04 EA08 GA03 GA07 GB02 3F304 AA03 CA05 CA12 EC05 3F306 BA24 DA27

Claims (8)

[Claims] 1. A hoisting machine, a rope wound around the hoisting machine, a riding basket hung on one side of the rope, and a case where the number of passengers is hung on the other of the ropes is zero. A counterweight set to a lighter weight than the weight of the riding cage; a motor that drives the hoist to raise and lower the riding cage; and a rectifier that rectifies AC power from a commercial power supply and outputs DC power. Means, a smoothing capacitor for smoothing the DC power, an inverter that converts the DC power smoothed by the smoothing capacitor into AC power of a variable frequency variable voltage and supplies the AC power to the motor, An elevator controller that outputs a rotation control signal, and is connected to both ends of the smoothing capacitor to store regenerative power of the motor and discharge the stored power during powering of the riding car. An elevator device comprising a power storage device. 2. A winding drum type hoist, a rope having one end connected to a winding drum of the winding drum type hoist, a riding basket connected to the other end of the rope, and the winding drum type winding device. A motor that drives the upper machine to raise and lower the riding basket; a rectifier that rectifies AC power from a commercial power supply and outputs DC power; a smoothing capacitor that smoothes the DC power; and a smoothing capacitor that smoothes the DC power. An inverter that converts the DC power into AC power of a variable frequency variable voltage and supplies the AC power to the motor, an elevator controller that outputs a rotation control signal of the motor to the inverter, and both ends of the smoothing capacitor. And a power storage device for storing the regenerative power of the motor and discharging the stored power when the riding cage is powered. 3. The elevator apparatus according to claim 1, wherein the rotation control signal includes a speed signal, a forward rotation signal, or a reverse rotation signal. 4. The elevator apparatus according to claim 1, wherein the power storage device includes an electric double layer capacitor as power storage means. 5. The elevator controller includes inter-floor stop detecting means for detecting that the riding car has stopped between floors when the commercial power supply fails, and when the inter-floor stop of the riding car is detected, The elevator apparatus according to any one of claims 1 to 4, wherein the car is driven to descend to stop at a predetermined floor. 6. The power storage device, a charge / discharge device connected to the smoothing capacitor, a power storage device connected to the charge / discharge device, a transformer connected to the power storage device, and inserted into a primary winding of the transformer. A secondary switch of the transformer is connected to a power supply of the elevator controller, a power supply of a charge / discharge controller in the charge / discharge device, and a power supply in the riding car, and the semiconductor switch The switching operation is performed so that the voltage of the secondary winding of the transformer becomes a voltage required for the power supply of the elevator controller, the power supply of the charge / discharge controller in the charge / discharge device, and the power supply in the riding car. The electric device according to any one of claims 1 to 5, wherein the electric power stored in the electric storage device is discharged through the secondary winding. Beta equipment. 7. The method according to claim 1, wherein the storage of the regenerative power and the discharge of the stored power by the power storage device are performed according to the rotation control signal. Elevator equipment. 8. The power storage device includes a current protection circuit connected to one end of the smoothing capacitor, and a power storage device connected between one end of the current protection circuit and the other end of the smoothing capacitor. The elevator apparatus according to any one of claims 1 to 6, wherein