JP2002145539A - Elevator device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elevator device comprising a control devices such as a controller and a power accumulator and a drive device mounted on an elevator body in which a means for feeding electricity to the elevator body is simplified by a means for saving the kinetic energy by accumulating and using regenerated electric power of the drive device. SOLUTION: An elevator engaging body 7 is mounted in an elevator passage 16, and the drive device 17 is mounted in the elevator body 8 to be engaged with the elevator engaging body 7 for driving the elevator body 8 to move upward/downward. In addition, the power accumulator 11 for accumulating the electric power regenerated by the drive device 17 and the control means 20 for controlling the drive device 17 with commercial electric power and for controlling the drive device 17 with the electric power of the power accumulator 11 at least at the time of acceleration during the power running are mounted on the elevator body 8. The drive device 17 is energized with both the commercial power and the power of the power accumulator 11 during the power running to save the kinetic energy and to simplify the power feeder means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is provided with a drive device which is provided on an elevator such as a car and engages with an elevator engaging member arranged on a hoistway to operate the elevator to operate the elevator. It relates to an elevator device.

[0002]

2. Description of the Related Art FIGS. 5 to 7 are views showing a conventional elevator apparatus, FIG. 5 is a structural view showing the arrangement of equipment, and FIG. 6 explains the control of the charge / discharge control apparatus of FIG. FIG. 7 is a flowchart for explaining the control at the time of charging of the charge / discharge control device of FIG. In the figure, 1 is a general commercial power such as a three-phase AC power supply, and 2 is a converter for converting the AC power of the commercial power 1 into a DC power supply, and is constituted by a diode or the like. 3 is converter 2
Is a DC bus to which the DC power converted by the DC bus is supplied.

Reference numeral 4 denotes an inverter which is controlled by a speed control device 5 for controlling the speed and position of the elevator, converts a direct current into an alternating current of a required variable voltage and variable frequency, and converts the converted direct current into a drive device 6 comprising an elevator hoist. The lifting / lowering operation is controlled by controlling the provided AC motor. Reference numeral 7 denotes a main rope wound around the driving device 6, and a car 8 is connected to one end of the main rope, and a counterweight 9 is connected to the other end. Among the above-mentioned equipment, three of the main rope 7, the car 8, and the counterweight 9 are provided on the hoistway (not shown) of the elevator, and the equipment other than the above three parties and the equipment described later are located above the hoistway. It is installed in a machine room (not shown) of the provided elevator.

[0004] Reference numeral 10 denotes an elevator control device, which is composed of a microcomputer or the like and controls the operation of the entire elevator. During power running operation of the elevator, the inverter 4 receives power from both the commercial power 1 and the power storage device 11.
Is supplied with power. The power storage device 11 generally includes a secondary battery, a DC / DC converter, and the like, and includes a charge / discharge control circuit controlled by the charge / discharge control device 12.

[0005] 13 is a regenerative control device, 14 is a regenerative control circuit, and 15 is a regenerative resistor. The number of the secondary batteries described above is kept small to make the power storage device 11 compact and inexpensive, and the output voltage of the secondary battery is
Voltage. Further, the voltage of the DC bus 3 is basically controlled in the vicinity of the voltage obtained by rectifying the commercial power.

Therefore, when charging the secondary battery, the DC bus 3
Is required to be lowered, and to increase to the voltage of the DC bus 3 at the time of discharging, the above-described DC / DC converter is employed. And a charging gate of the DC / DC converter,
The control of the discharge gate is performed by the charge / discharge control device 12.

[0007] The conventional elevator apparatus is configured as described above, and the control at the time of discharging of the charge / discharge control device 12 will be described with reference to the flowchart shown in FIG. In other words, a more stable control can be performed by using a current control minor loop or the like for voltage control as a control system. However, for the sake of simplicity, a description will be given of a system controlled by a DC bus voltage. That is, the discharge control is instructed in step 101, and the process proceeds to step 102 to measure the DC bus voltage.

Next, the process proceeds to step 103, and if it is less than the predetermined voltage, the process proceeds to step 104; And step 104
If it is within the predetermined discharge current value, the process proceeds to step 105, and if it exceeds the predetermined discharge current value, the process proceeds to step 106. Then, in step 105, the gate ON time =
The current time is set to + DT, and the routine proceeds to step 107. In step 106, the gate ON time is set to the current time−DT, and the process proceeds to step 107. Then, gate ON control is performed in step 107.

That is, first, the DC bus voltage is measured, and if the DC bus voltage is higher than the required DC bus voltage, it is turned ON.
The pulse width is shortened, and if it is low, the ON pulse width is lengthened.
By increasing the ON pulse width, more current is allowed to flow from the secondary battery, thereby increasing the supply power and increasing the DC bus voltage by supplying power. In addition, since the elevator needs power supply during power running operation of the elevator, the required power is dealt with by discharging from the secondary battery and supplying from commercial power.

When the DC bus voltage is controlled to be higher than the output voltage of the converter 2 from commercial power, all power is supplied from the secondary battery. However, in order to configure the inexpensive power storage device 11, it is designed such that not all power is supplied from the secondary battery but is supplied from the secondary battery and commercial power at an appropriate ratio. That is, step 10 in FIG.
In FIG. 4, the distribution current corresponding to the distribution of the discharge current is compared. If the current is within a predetermined value, the ON pulse width is lengthened to further increase the supply amount. Clip.

According to such control, the portion of the power required by the inverter 4 which is supplied from the secondary battery is clipped, so that the DC bus voltage is reduced, and consequently the power supply from the converter 2 is started. You. And since these controls are performed in a very short time, actually settle down to an appropriate DC bus voltage to supply the required power of the elevator, and supply power at a required ratio from the secondary battery and commercial power It becomes possible.

The control during charging of the charge / discharge control device 12 will be described with reference to a flowchart shown in FIG. That is, from the charging control entrance of step 201 to step 202
Then, the DC bus voltage is measured, and the routine proceeds to step 203. If it is less than the predetermined voltage in step 203, the process proceeds to step 204, where the ON pulse width is reduced. If the voltage is equal to or higher than the predetermined voltage in step 203, the process proceeds to step 205, where the ON pulse width is increased.

That is, when there is power regeneration from the AC motor of the driving device 6, the DC bus voltage rises due to the power regeneration from the AC motor. This voltage is the converter 2
When the output voltage becomes higher than the output voltage, the power supply from the commercial power is stopped. In such a device configuration, if there is no power storage device 11 and the power supply from the commercial power continues to be stopped, the DC bus voltage increases.

For this reason, when the voltage reaches a certain specified voltage, the regenerative control device 13 is operated, the regenerative control circuit 14 is closed, electric power is supplied to the regenerative resistor 15, and the regenerative electric power is consumed. The elevator is decelerated. On the other hand, when the power storage device 11 is provided, the power flowing through the regenerative resistor 15 is controlled by the charge / discharge control device 12 with the following voltage at which power flows through the regenerative resistor 15. Is charged.

Then, when the DC bus voltage is measured and becomes equal to or higher than a predetermined voltage, the regenerative state is detected, and the charging current is increased by increasing the charging ON pulse width. When the regenerative power from the elevator decreases with the passage of time, the voltage of the DC bus also decreases accordingly, the ON pulse width of charging is controlled to be short, and the charging power is also controlled to be small. As described above, by monitoring the DC bus voltage and controlling the charging power, the DC bus voltage value is controlled to an appropriate range and charging is performed. Therefore, the operation energy can be saved by storing and reusing the electric power conventionally consumed by the regenerative electric power.

[0016]

In the conventional elevator apparatus as described above, the apparatus configuration for storing and using the regenerative electric power of the drive unit 6 to save energy is provided by an elevator control unit 10, a power storage unit 11, and the like. The control device and the driving device 6 are applied to an elevator provided on an elevator such as a car 8. Further useful effects can be obtained in such an elevator apparatus.

The present invention saves operating energy by storing and using regenerative power of a driving device in a device configuration in which a control device such as an elevator control device, a power storage device, and a driving device are provided on a lifting body. It is an object of the present invention to provide an elevator apparatus which simplifies a power supply means from a hoistway to a hoist.

[0018]

In an elevator apparatus according to the present invention, a lift engaging member provided between an upper end and a lower end of a hoistway, and a hoist provided on a hoist which moves up and down the hoistway are provided. A driving device that engages with the engagement body for raising and lowering the lifting body through the engagement body for raising and lowering, a power storage device that stores regenerative power by the driving device and discharges during power running, A control means is provided to control the drive device with commercial power and to control the drive device via the electric power of the power storage device at least at the time of acceleration or deceleration of the elevating body on which the lifting load acts.

Further, in the elevator apparatus according to the present invention, the electric power is stored so that the commercial power supplied via the moving cable provided between the hoistway and the hoisting body is equal to or less than the current carrying capacity of the moving cable. Control means for controlling the discharge power from the device is provided.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 1 to 3 show an embodiment of the present invention. FIG. 1 is a cross-sectional plan view of a hoistway, FIG. 2 is an elevation view conceptually showing the hoistway in FIG. 1, and FIG. 2 is a power pattern at the time of a power running operation of the elevating body in FIG. 1. In the drawing, reference numeral 16 denotes a hoistway of an elevator, and 8 denotes a hoisting body composed of a car that moves up and down a predetermined path of the hoistway 16, and a drive device 17 having a drive sheave is provided on both sides of the lower surface.

Numeral 9 denotes a lifting weight which moves up and down another predetermined path of the hoistway 16, and a suspension wheel 18 is pivotally mounted on the upper part thereof.
Reference numeral 19 denotes a pulley pivotally mounted on the top of the hoistway 16, and reference numeral 7 denotes a lifting engagement body composed of a main rope. One end of the pulley is connected to the top of the hoistway 16 and descends to drive the driving device 17 on one side of the hoisting body 8. , And then wound around the other drive unit 17, again wound around the one drive unit 17 and the other drive unit 17, raised around the pulley 19, and lowered. The weight 9 is wound around the lifting wheel 18 and rises, and the other end is connected to the top of the hoistway 16.

Reference numeral 11 denotes a power storage device, which is mounted at the center of the lower surface of the elevating body 8 and includes a secondary battery, a DC / DC converter, and the like. A circuit is provided. Numeral 20 denotes a control means of the elevator, and the power storage device 11
The converter 2, the DC bus 3, the inverter 4, the elevator control device 10, the speed control device 5, the charge / discharge control device 12, the regenerative control device 13,
A regenerative control circuit 14 and a regenerative resistor 15 are provided.
A moving cable 21 has one end connected to a connection box provided on the wall of the hoistway 16 and the other end connected to the control means 20.

In the elevator apparatus configured as described above, the driving device 17 and the power storage device 11
And control means 20 are provided. And the above-mentioned FIGS.
As with the elevator apparatus shown in FIG.
Is energized. As a result, the drive sheave of the drive device 17 rotates, and the elevating body 8 moves up and down via the elevating and engaging body 7, and the counterweight 9 moves up and down in the opposite direction to the elevating body 8.

The regenerative electric power is supplied from the drive unit 17 during the lowering operation when the weight of the lifting body 8 is heavier than the counterweight 9 and the ascent operation when the weight of the lifting body 8 is lighter than the counterweight 9. Occurs. At this time, the regenerative electric power is stored in the power storage device 11 similarly to the elevator device shown in FIGS. In addition, when the lifting operation is performed when the weight of the lifting body 8 is heavier than the counterweight 9, and when the lifting operation is performed when the weight of the lifting body 8 is lighter than the counterweight 9, the powering operation is performed. The elevating operation of the body 8 is performed.

At this time, as shown in FIG. 3, the driving device 17 is attached by the electric power from both the commercial power 1 and the power storage device 11 by the moving cable 21 in the same manner as the elevator device shown in FIGS. Be inspired. In this way, the operating energy can be saved by storing and using the regenerative power in the power storage device 11.

Further, since the supply amount of the commercial power 1 in the elevating operation of the elevating body 8 to which the elevating load acts is reduced, the electric wire size of the moving cable 21 and the number of electric wires can be reduced. Therefore, the installation cost of the moving cable 21 can be reduced. In addition, at the time of the elevating operation of the elevating body 8 to which the elevating load acts, it is possible to obtain the operation energy saving effect and the moving cable 21 reducing effect by using the power of the power storage device 11 at least when the elevating body 8 is accelerated. it can.

The speed control device 5 of the control means 20 is provided with a means (not shown) for calculating the power supplied to the inverter 4, and is provided with the above-described step 10 in FIG.
3, Step 104, Step 105, Step 106
The following control is performed in the processing by. That is, the amount of discharge current from the power storage device 11 is controlled such that the power supplied from the commercial power becomes equal to or less than the current carrying capacity of the moving cable 21. This also allows moving cable 2
1 can be optimized and the installation cost of the moving cable 21 can be reduced.

Embodiment 2 FIG. 4 is a diagram showing an example of another embodiment of the present invention, and is a diagram corresponding to FIG. 2 described above.
Except for FIG. 4, an elevator apparatus is configured in the same manner as in the above-described embodiment of FIGS. In the drawings, the same reference numerals as those in FIGS. 1 to 3 denote corresponding parts, 8 is an elevator car, 22 is a pulley pivotally mounted on both sides of the lower surface of the car 8, and 9 is an elevator elevating body composed of a counterweight. A driving device 23 having a drive sheave also serving as a hanging wheel,
The power storage device 11 and the control means 20 are provided.

In the elevator apparatus configured as described above, the driving device 17 and the power storage device 1
1 and control means 20 are provided. Then, FIG.
3, the regenerative power by the driving device 17 is stored in the power storage device 11, and the commercial power 1 and the power stored in the power storage device 11 are used by the driving device 17.
Is energized. Therefore, although detailed description is omitted, the same operation as the embodiment of FIGS. 1 to 3 can be obtained also in the embodiment of FIG.

[0030]

As described above, the present invention relates to a lifting / lowering engaging member provided between an upper end and a lower end of a hoistway, and a lifting / lowering engaging member provided on a lifting / lowering body which moves up and down the hoistway. A driving device that engages and is urged to raise and lower the elevating body via the elevating engagement body, and stores regenerative power by the driving device,
A power storage device that discharges during power running and a drive device that is provided in the elevating body and controls the driving device with commercial power, and controls the driving device via the power of the power storage device at least at the time of acceleration or deceleration of the elevating body on which the lifting load acts. And control means for performing the control.

As a result, the regenerative electric power generated by the driving device is accumulated in the power storage device when the elevating body to which the elevating load does not act is moved up and down. In addition, when the elevating body is moved up and down by the elevating load, the driving device is energized by the electric power from both the commercial power and the power storage device. In this way, since the regenerative power is stored in the power storage device and used, there is an effect of reducing the operation energy. In addition, since the supply of commercial power is reduced when the elevating body is acted on by the elevating load,
The size of the wire of the moving cable can be reduced, and the number of wires can be reduced. For this reason, there is an effect of reducing the installation cost of the moving cable.

Further, as described above, according to the present invention, the electric power is stored so that the commercial power supplied via the moving cable provided between the hoistway and the hoisting body is equal to or less than the current carrying capacity of the moving cable. It is provided with control means for controlling the discharge power from the device.

As a result, the regenerative electric power generated by the driving device is accumulated in the power storage device when the elevating body to which the elevating load does not act is moved up and down. In addition, when the elevating body is moved up and down by the elevating load, the driving device is energized by the electric power from both the commercial power and the power storage device. In this way, since the regenerative power is stored in the power storage device and used, there is an effect of reducing the operation energy. In addition, since the supply of commercial power is reduced when the elevating body is acted on by the elevating load,
The size of the wire of the moving cable can be reduced, and the number of wires can be reduced. Further, the discharge power from the power storage device is controlled such that the commercial power supplied via the moving cable is equal to or less than the current carrying capacity of the moving cable. Therefore, there is an effect that the capacity of the moving cable can be optimized and the installation cost of the moving cable can be reduced.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of the present invention, and is a cross-sectional plan view of a hoistway.

FIG. 2 is an elevation view conceptually showing a hoistway in FIG. 1;

FIG. 3 is a power pattern of the lifting body in FIG. 1 during power running operation.

FIG. 4 is a view showing a second embodiment of the present invention, and is a view corresponding to FIG. 2 described above.

FIG. 5 is a diagram illustrating a conventional elevator apparatus, and is a configuration diagram illustrating an arrangement of devices.

FIG. 6 is a flowchart for explaining control at the time of discharging of the charge / discharge control device of FIG. 5;

FIG. 7 is a flowchart illustrating control during charging of the charge / discharge control device of FIG. 5;

[Explanation of symbols]

7 lifting body, 8 lifting body, 9 lifting body, 11 power storage device, 16 hoistway, 17 driving device, 20 control means, 21 moving cable, 23 driving device.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Nobuo Anzai F-term (reference) 3F002 GA03 GA07 in 2-6-1 Otemachi, Chiyoda-ku, Tokyo, Mitsubishi Electric Building Techno Service Co., Ltd.

Claims (2)

[Claims] 1. A hoisting and lowering member provided between an upper end and a lower end of a hoistway, and a hoisting and lowering member provided on a hoisting member for elevating and lowering the hoistway. A driving device for raising and lowering the elevating body via the elevating engagement body, a power storage device for storing regenerative power by the driving device and discharging during power running, and An elevator apparatus comprising: control means for controlling a driving device and controlling the driving device via electric power of the power storage device at least at the time of acceleration or deceleration of the elevating body to which an elevating load acts. 2. A control device according to claim 1, wherein said control means controls a discharge power from said power storage device so that a commercial power supplied through a moving cable provided between said hoistway and said hoisting body is equal to or less than a current carrying capacity of said moving cable. 2. The elevator apparatus according to claim 1, wherein the elevator is controlled.