JP5741686B2 - Elevator control device - Google Patents

Description

The present invention relates to an elevator control device.

As a conventional elevator control device, a control device using a regenerative converter is known as shown in Patent Document 1 below.
This control device is an elevator control device equipped with a variable voltage variable frequency inverter having a power running converter and a regenerative converter, and an emergency generator, and is provided with a regenerative power consuming circuit on the DC side of the inverter. When the elevator is operated by the machine, the regenerative converter is blocked to activate the regenerative power consumption circuit so that the regenerative power is consumed.

According to the above control device, when the elevator is operated by a normal power source, the regenerative power is returned to the power source side, so the power consumption is reduced. When operating an elevator with an emergency power supply, the regenerative power is consumed on the DC side, so that the regenerative power that is troublesome for the emergency generator does not flow in, and no voltage notch occurs. The generator capacity can be reduced.

JP 59-149781 A

However, in the elevator control device, the regenerative power generated from the motor is only returned to the power source using the regenerative converter. On the other hand, the inventor made the elevator function temporarily as a power generation facility in the event of a power failure, considering that the regenerative power generated from the elevator did not function as a power supply source in the event of a power failure. Thus, the present inventors have found that the regenerative power is used as a power supply source to drive electric equipment outside the elevator.

The present invention has been made to solve the above-described problems, and an object thereof is to provide an elevator control device that functions as a power supply source using the regenerative power in the event of a power failure. .

An elevator control apparatus according to a first aspect of the present invention includes a motor that lifts and lowers the car while the car and the counterweight are formed in a sliding manner, and rectifies an AC power source by a rectifier and the motor by an inverter. In the elevator control device that converts the regenerative power generated from the motor into the AC power source via the inverter and regenerative means,
During a power outage, the regeneration means, after electrically opened by opening means the rectifying means from the AC power supply, is electrically connected by the regenerative electric power generated by the travel of the cage in the regeneration unit and the AC power supply side Drive electrical equipment.
According to such an elevator control device, in the event of a power failure, the switching means is electrically connected to the regenerative means by regenerative power generated by the traveling of the car after the regenerative means and the rectifying means are electrically opened from the AC power source. Drive electrical equipment. Therefore, in the event of a power failure, the elevator functions as a power supply source and can drive the electrical equipment.

The elevator control apparatus according to the second invention includes a load detection means for detecting a load in the car, a power consumption setting means for setting a power consumption value of the electric device, a detected load and a power consumption value of the electric device. And a speed adjusting means for adjusting a speed command of the inverter that drives the motor.
Thereby, a speed adjustment means adjusts the speed command of the inverter which drives a motor based on the detected load and the power consumption value of an electric equipment. Therefore, the generated power that can be generated from the elevator can be adjusted by adjusting the speed of the car according to the power consumption of the electric equipment and the load in the car. Since power consumption and generated power of the electric device can be adjusted, voltage fluctuations of the power source supplied to the electric device can be suppressed.

According to a third aspect of the present invention, there is provided an elevator control device comprising: a power detection unit that detects regenerative power supplied to an electrical device; a power consumption setting unit that sets a power consumption value of the electrical device; and the detected regenerative power. It is preferable to include a speed adjustment unit that adjusts a speed command of the inverter that drives the motor based on a power consumption value of the electric device.
Thereby, the speed adjustment means can adjust the generated power that can be generated from the elevator by adjusting the speed command of the inverter that drives the motor based on the detected regenerative power and the power consumption value of the electric device. Since power consumption and generated power of the electric device can be adjusted, voltage fluctuations of the power source supplied to the electric device can be suppressed.

According to a fourth aspect of the present invention, there is provided an elevator control apparatus comprising a power storage means provided on the direct current side of the rectifying means so as to be able to store electric power, and the control means stores regenerative power generated by traveling of the car in the power storage means. Preferably, the electric device is driven through the regenerative unit based on the electric power from the power storage unit.
Thus, the control means stores the regenerative power generated by the traveling of the car in the power storage means, and then drives the electric device via the regenerative means based on the power from the power storage means. Electric power can be supplied without depending on it.

The elevator control apparatus according to the fifth aspect of the invention preferably includes display means for displaying the regenerative power value and the duration of the regenerative power.
Thereby, since the power supply capability at the time of using an elevator as an emergency power supply device at the time of a power failure is displayed, the usability of the emergency power supply device can be improved.

The elevator control apparatus according to the sixth invention preferably includes a plurality of elevators, and includes control means for supplying regenerative power for each of the elevators to an electric device.
Thereby, since an electric equipment can be driven based on regenerative electric power which arises from a plurality of elevators, the capacity of the electric equipment which can be driven can be expanded.

ADVANTAGE OF THE INVENTION According to this invention, the control apparatus of the elevator which can drive an electric equipment using the regenerative electric power which generate | occur | produced from the elevator by functioning an elevator as an electric power supply source at the time of a power failure can be obtained.

1 is an overall view of an elevator control device according to an embodiment of the present invention. It is a flowchart which shows operation | movement of the control apparatus of the elevator of FIG. It is a time chart which shows operation | movement of the control apparatus of the elevator of FIG. It is a flowchart which shows operation | movement of the control apparatus of the elevator by other embodiment of this invention. It is a time chart which shows operation | movement of the control apparatus of the elevator by other embodiment of this invention.

2 cages, 5 counterweights, 11 motors, 13 load detectors, 20 three-phase AC power supplies, 22 switches, converters with 32 regenerative functions, 36 inverters, 50 control units, 60 power supply monitoring units, 80 indicators, 200 pumps.

Embodiment 1 FIG.
An embodiment of the present invention will be described with reference to FIG. FIG. 1 is an overall view of an elevator control apparatus showing an embodiment of the present invention.
In FIG. 1, a first elevator 1 is connected to a three-phase AC power source 20 via a switch 22 as an opening / closing means that can be electrically opened and closed. Similarly, an AC power source is connected via a switch 22 to a pumping pump 200 as an electrical device that pumps tap water to store on the roof of the building, and a second elevator 100 that is formed in the same manner as the first elevator 1. 20 is connected.

The elevator 1 has a counterweight 5 formed in a cage shape on a car 2 via a rope 3, and has a hoisting machine 7 that winds the rope 3 and moves the car 2 up and down. The hoisting machine 7 is equipped with a brake 9 and a motor 11.
The elevator control device has a load detector 13 as load detection means for detecting a boarding load in the car 2, and rectifies the AC power source 20 to obtain DC power, and this DC power is converted into AC power. The motor 11 is driven at a variable speed by a voltage having a variable voltage and a variable frequency by a power converter 30 that converts the voltage into a voltage. The DC bus 34 of the power converter 30 has a power accumulator 40 as power storage means for storing and discharging power.

Further, the control device includes a control unit 50 that generates a command signal for controlling the power converter 30 and receives a load detection signal from the load detector 13. The control unit 50 receives a power failure detection signal from a power supply monitor 60 as a power detection means for detecting a power failure, and sets a power to be generated when the elevator 1 functions as a generator at the time of a power failure. The power command signal from 70 is received. The control unit 50 is configured to send a signal for displaying a power value or the like to the display device 80, and has a function as a control unit and a speed adjustment unit.

The power converter 30 rectifies the AC power source 20, converts DC power into AC power, and supplies power to the pumping pump 200. A converter 32 with a regeneration function as a regeneration unit, And a capacitor 33 for smoothing the pulsated output voltage.
Further, the power converter 30 is connected to an inverter 36 that drives the motor 11 at a variable speed via a DC bus 34 that is an output of the converter 32, and regenerative power generated from the motor 11 is controlled by a transistor and consumed by a resistor. And a regenerative resistor circuit 38.

The power accumulator 40 includes a power storage unit 41 that stores power including a lead storage battery or a nickel metal hydride battery, and a DC-DC that controls charge / discharge of the power storage unit 41 and can boost the voltage of the power storage unit 41. And a charging / discharging unit 43 including a converter or the like.
In addition, as for the apparatus etc. which should be operated at the time of a power failure, such as the control part 50, the power supply monitoring part 60, and the load detector 13, the power supply at the time of a power failure is ensured with the storage battery which is not shown in figure.

Next, the operation in the normal operation of the elevator control apparatus configured as described above will be described.
<During normal operation>
In FIG. 1, when the switch 22 is in a closed state and a passenger rides on the car 2 in a state that is almost close to the rated value and starts the ascending operation, the motor 11 becomes a power running that consumes power. At this time, the control unit 50 controls the charging / discharging unit 43 by starting the elevator 1 to start discharging from the power storage unit 41, and controls the voltage of the DC bus 34 to a specified voltage.
On the other hand, when the power of the elevator 1 is insufficient due to the discharge power from the power storage unit 41, both the power from the power storage unit 41 and the power supplied from the commercial power source output from the converter 32 are covered. In this way, energy is saved by accumulating regenerative power in the power accumulator 40 and reusing the power.

Next, in the closed state of the switch 22, when the car 2 starts the ascending operation with no load, the regenerative operation returns the speed energy of the car 2 to electric power, and the voltage of the DC bus 34 is increased by this regenerative power. For example, when the voltage of the DC bus 34 reaches a specified voltage, the control unit 50 controls the charging / discharging unit 43 to charge the power storage unit 41 with regenerative power. As another control means, the charge / discharge unit 43 may be controlled while monitoring the regenerative power to charge the power storage unit 41 with the regenerative power.

Next, the operation operation at the time of a power failure of the elevator control apparatus configured as described above will be described.
<During power failure>
As illustrated in FIG. 1, when power cannot be supplied from the AC power supply 20 due to a power failure or the like, there are cases where it is desired to temporarily move the pumping pump 200 and the elevator 100. For example, there is a case where it is necessary to use tap water on the upper floor of the housing complex during a power failure, and the pumping pump 200 is moved only for a short time.
In addition, when a wheelchair user is waiting for evacuation on the upper floor, it is necessary to temporarily drive the elevator 1 to evacuate the wheelchair user. In such a case, there is a means to carry the emergency generator temporarily from another place and use it, but it is difficult to respond when it is desired to supply power immediately. Therefore, electric power is supplied to the pumping pump 200 using the power generation function of the elevator 1 as follows.
In addition, it is preferable that the electric device driven using the power generation function of the elevator 1 can withstand a certain amount of voltage fluctuation like the pumping pump 200.

First, as shown in FIG. 2, the user opens the switch 22 to disconnect the elevator 1 and the like from the AC power source 20 (step S101), and sets the power consumption value for operating the pumping pump 200 to the power consumption setting unit 70. Set (step S103). The controller 50 sets the traveling speed of the car 2 based on the set power consumption value.
At this time, the traveling speed is generally obtained by dividing the power consumption value by the mass difference between the car 2 and the counterweight 3. As this power consumption, a value obtained by adding the mechanical loss for raising and lowering and the electrical loss of the motor 11 and the power converter 30 to the set power consumption is used. Normally, a car-free state is assumed in which no people are present in the car 2. However, when a load or the like is placed in the car 2, the load in the car 2 detected by the load detector 13 is corrected. It is necessary to obtain the mass difference between the car 2 side and the counterweight 5 side.

Next, the control part 50 starts the motor 11 as a generator (step S105). When the car 2 travels in the regenerative operation direction based on the set speed, the speed of the car 2 gradually increases as shown in FIG. 3A, and the motor 11 acts as a generator, as shown in FIG. The regenerative power PR is generated as follows. The control unit 50 displays the power detected by the power supply monitoring unit 60 on the display device 80 (step S107). The user checks whether or not the power detected by the power supply monitoring unit 60 has reached a set value (step S109). As shown in FIG. 3 (d), since the pumping pump 200 cannot be used for the dotted line portion that does not reach the set power, it is confirmed that the set power is reached. When the regenerative power reaches the set power value, the control unit 50 operates the converter 32 of the power converter 30 to supply power to the pumping pump 200 (step S111), and the car 2 eventually becomes the terminal floor. When approaching, the car 2 is decelerated. Accordingly, the power supply monitoring unit 60 detects that the generated power from the motor 11 has decreased (step S113). The control unit 50 receives this detection and ends the operation of the pumping pump 200.
In step S109, the power of the dotted line shown in FIG. 3D where the power detected by the power supply monitoring unit 60 does not reach the set value is consumed by the resistance of the regenerative resistor circuit 38.
In addition, an electric device that can be driven even when the voltage gradually increases can be driven with the power of the dotted line shown in FIG.

The elevator control apparatus according to the above embodiment has a car 11 and a counterweight 5 that are formed in a slidable manner, and has a motor 11 that raises and lowers the car 2, and has a three-phase AC power supply 20 with a regeneration function. In an elevator control device that rectifies by a converter 32 and drives the motor 11 by an inverter 36 and converts the regenerative power generated from the motor 11 to the AC power supply 20 through the inverter 36 and the converter 32 with a regeneration function, In this case, after the converter 32 is electrically opened from the AC power source 20 by the switch 22, the controller 50 includes a control unit 50 that drives the pump 80 that is electrically connected to the converter 32 by regenerative power generated by the traveling of the car 2. It is.

According to the elevator control device, in the event of a power failure, after the switch 22 electrically opens the converter 32 from the AC power supply 20, the pump is electrically connected to the converter 32 by regenerative power generated by the traveling of the car 2. 200 is driven. Therefore, the elevator 1 can function as an electric power supply source and can drive the pumping pump 200 at the time of a power failure.

Like the elevator control device of the above embodiment, the load detector 13 that detects the load in the car 2, and the inverter that drives the motor 11 based on the detected load and the power consumption value of the pumping pump 200 It is preferable to include a control unit 50 as speed adjusting means for adjusting 36 speed commands.
Thereby, the control part 50 adjusts the speed command of the inverter 36 which drives the motor 11 based on the load detected by the load detector 13 and the power consumption value of the pumping pump 200. Therefore, the generated power that can be generated from the elevator 1 can be adjusted by adjusting the speed of the car 2 according to the power consumption of the water pump 200 and the load in the car 2. Therefore, since the electric power generated from the elevator 1 can be adjusted according to the power consumption of the pumping pump 200, the voltage fluctuation of the power supply supplied to the pumping pump 200 can be suppressed.

As in the elevator control device of the above-described embodiment, the power monitoring unit 60 that detects the regenerative power supplied to the pumping pump 200, and the motor based on the detected regenerative power and the power consumption value of the pumping pump 200. And a control unit 50 that adjusts the speed command of the inverter 36 that drives the inverter 11.
Thereby, the control part 50 can adjust the electric power which can be generated from the elevator 1 by adjusting the speed command of the inverter 36 which drives the motor 11 based on the detected regenerative electric power and the power consumption value of the pumping pump 200. . Therefore, the generated power from the elevator 1 can be adjusted according to the power consumption of the pumping pump 200.

Embodiment 2. FIG.
In the first embodiment, the pumping pump 200 is directly driven using the regenerative power generated from the motor 11 in the event of a power failure. However, in the present embodiment, the regenerative power generated from the motor 11 is temporarily used as the power accumulator 40. Then, the pumping pump 200 is driven by the electric power stored in the electric power accumulator 40.

The control apparatus for an elevator according to another embodiment of the present invention is the same as that of the first embodiment, and its operation will be described with reference to FIGS. 4, the same reference numerals as those in FIG. 2 denote the same operations, and the description thereof is omitted.
The elevator control apparatus executes steps S101 to S105 in the same manner as in the first embodiment. And after starting an elevator in step S105, as shown to Fig.5 (a)-(c), the regenerative electric power generate | occur | produced from the motor 11 is accumulate | stored in the electric power storage device 40 via the inverter 36 (step S209). The control unit 50 determines whether or not the traveling of the car 2 has been stopped by the speed detector 12 (step S211). When the control unit 50 determines that the car 2 has stopped, the control unit 50, as shown in FIG. Then, the pumping pump 200 is operated from the electric power accumulator 40 through the converter 32 with regeneration (step S213), and the operation of the pumping pump 200 is eventually ended.

Further, the control unit 50 controls the charging and discharging unit 43 and the converter 32 of the power storage device 40 as while monitoring the power consumption by the activation of water pumps 200 power monitoring section 60, an appropriate generated power P _O You can also. Thereby, even if a user does not set power consumption to the power consumption setting device 70 or confirms the generated power from the elevator 1 with the display device 80, the power can be stably supplied to the pumping pump 200. it can.

Further, when the car 2 travels on the indicator 80, for example, the car 2 travels from the lowermost floor to the uppermost floor with no load, or the regenerative electric energy that can be generated or the electric power generated when the car 2 travels. The duration can also be displayed.
Further, the power and duration can be calculated from the amount of power stored in the power storage 40 and displayed. In this case, since the power supply capability at the time of using the elevator 1 as an emergency power supply device is known, usability is improved.

Moreover, the regenerative operation can be performed in cooperation with a plurality of elevators 1 and 100, and the pumping pump 200 can be operated using the total of these as generated power. In this case, it becomes possible to supply larger electric power than one elevator, and the pumping pump 200 and the like that require large electric power can be temporarily operated even during a power failure.

The elevator control device of the above embodiment includes a power storage 40 provided on the DC side of the converter 32 with regeneration so that power can be stored, and the control unit 50 stores the regenerative power generated by the traveling of the car 2 as power. It is preferable to drive the pumping pump 200 via the converter 32 with regeneration based on the electric power from the electric power accumulator 40 after storing in the accumulator 40.
As a result, the control unit 50 stores the regenerative power generated by the traveling of the car 2 in the power accumulator 40, and then drives the lift pump 200 via the regenerative converter 32 based on the power from the power accumulator 40. The electric power can be stably supplied to the pumping pump 200 without depending on the load of the car 2 and the traveling state.

  The present invention can be applied to an elevator control device.

Claims (6)

The car and the counterweight are formed in a slat type and have a motor for raising and lowering the car.
In an elevator control device that rectifies an AC power source by a rectifying unit and drives the motor by an inverter, and converts regenerative power generated from the motor to the AC power source through the inverter and regenerative unit,
During a power outage, the regeneration means, after electrically opened by opening means the rectifying means from the AC power supply, is electrically connected by the regenerative electric power generated by the travel of the cage in the regeneration unit and the AC power supply side Control means for driving the electrical equipment,
An elevator control device comprising: Load detecting means for detecting the load in the car;
Power consumption setting means for setting a power consumption value of the electrical device;
Speed adjusting means for adjusting a speed command of the inverter that drives the motor based on the detected load and the power consumption value;
The elevator control device according to claim 1, further comprising: Power detection means for detecting regenerative power supplied to the electrical equipment;
Power consumption setting means for setting a power consumption value of the electrical device;
Speed adjusting means for adjusting a speed command of the inverter that drives the motor based on the detected regenerative power and the power consumption value;
The elevator control device according to claim 1, further comprising: Power storage means provided on the DC side of the rectifying means so as to be able to store electric power,
The control means stores the regenerative power generated by the traveling of the car in the power storage means, and then drives the electric device via the regeneration means based on the power from the power storage means.
The elevator control device according to claim 1 or 2. Display means for displaying the regenerative power value and the duration of the regenerative power;
The elevator control device according to any one of claims 1 to 4, further comprising: A plurality of the elevators,
Control means for supplying regenerative power for each elevator to the electrical equipment,
The elevator control device according to claim 1, further comprising an elevator control device.

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