JPS59227668A - Elevator device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] This invention supplies power from a battery when traveling, and stores regenerated energy in a battery when regenerating, so that the elevator can be operated both during normal power supply and during a power outage. Voltage variable frequency control method (hereinafter referred to as VVVF)
L1 relates to elevator equipment (referred to as a control method), and particularly relates to an operation control method during a power outage.

2. Description of the Related Art Conventionally, an elevator apparatus using a vvvr control system that also uses a battery has a configuration as shown in FIG. In FIG. 1, there are 1 single-phase elevator power sources, 3
is a battery that is charged by a charger connected to a power source via a no-fuse sprayer, and a battery charger 3.
Electrical energy during movement is supplied from the Patstelida. 3
is an inverter connected to the battery, and this inverter 3 converts direct current into three-phase alternating current of arbitrary voltage and frequency, and a three-phase induction motor is connected to the AC output end of the inverter through a driving taffeta 6. has been done. A sheave 9 is connected to the three-phase induction motor via a speed reducer g, and a rope 10 is wound around the sheave 9. A car/l is attached to one end of the four-prong lo, and a car/l is attached to the other end. is the counterweight l
Each one is connected.

In the VVVF control type elevator system configured as described above, when moving (during acceleration, when lifting a load at a constant speed, etc.)
Electrical energy is supplied from the battery, and when a travel command turns on the contactor 6 and a speed command is given to the inverter 3, the inverter S outputs a three-phase alternating current with variable voltage and frequency according to the speed command. The generated electricity is supplied to a three-phase induction motor to operate the elevator. Also, during regeneration (during deceleration, constant lowering speed, etc.), the three-phase induction motor functions as a generator, and the AC power generated from 1 is converted to DC by passing through inverter 3, and is converted into regenerative energy. Electricity is stored in the

Such operations are performed in substantially the same way both during normal power supply and during power outage. Furthermore, this type of elevator system has the following features.

(11 Since the regenerated energy is stored in the battery, the charger capacity only needs to be prepared to match the amount of charge during regeneration from the amount of discharge during traveling, and the capacity of the power source can also be small. .

(2) Therefore, if the battery capacity is selected to an appropriate value, the elevator can be operated continuously for a relatively long time even during a power outage.

However, when operating an elevator during a power outage, the energy that is equal to the difference between (back energy) - (regenerative energy) is cut off from the power source, so the battery capacity is equal to the energy difference above. will definitely decrease by the amount equivalent to . However, in the conventional system, in the event of a power outage, the system is basically able to operate in the same way as a normal power supply, so if it is enabled to operate for a predetermined period of time (for example, 2 hours), it will require a corresponding amount of capacity. Requires battery.

Further, since the size and cost of the battery are approximately proportional to the capacity, the size of the battery storage box, the battery, and the charger become large, and the cost also becomes high.

This invention solves the above problem, and is an elevator that reduces the battery capacity and increases the operating time by reducing the startup frequency during power outage compared to normal power supply. The purpose is to provide equipment.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A concrete implementation side of the present invention will be explained below based on the drawings.

FIG. 2 shows an example of the elevator system of the present invention, where the same reference numerals as in FIG. ,? a and a normally closed contact/3b. /da is a startup command generation device during normal power supply, 13 is a startup command generation device during power outage, and the startup command generation device /,! - is an elevator, and when /l stops in the area where the door can be opened and closed,
The time from when the door opens to when the door closes (hereinafter referred to as non-interference time) is made longer than when using normal power supply, and the interval until the start command is sent is extended. The above startup command generation device/da and/or during normal power supply and power outage
. The speed command signal from now on is input to the inverter control device 7g that controls the inverter S.

Next, the operation of this embodiment configured as described above will be explained.

During normal power supply, the power failure detection relay /, 7 is placed in the pickup state, so the normally open contact /Ja is closed.

The normally closed contact /3b is open, so only the start command generating device /1I during normal power supply is connected to the running command device /6.

In such a state, when a start command is sent from the start command generation device LD upon completion of door closing, the travel command generation device/6 operates, and at the same time, the contactor 6 is turned on and the travel command signal is changed to the speed. By adding it to the command generation device I, the speed command generation device/I sends out a speed pattern signal and applies it to the inverter control device IT. The inverter control device IS controls the inverter 3 according to the speed pattern signal, thereby controlling the inverter! The three-phase AC output converted from a low voltage, low frequency state to a predetermined voltage
The speed of the three-phase induction motor 7 is gradually increased from 0 to the rated speed. Accordingly, the elevator car 1/ will be run according to the speed pattern. At this time, the frequency of starting the elevator according to the command from the starting command generating device IIl is, for example, 150 times/hour.

Further, even if the elevator is operated with battery power at such a startup frequency, the difference between (power running energy) - (regenerative energy) is replenished from the charger 3, so the capacity of the battery lidar does not decrease.

On the other hand, during a power outage, the power source I is cut off, so
The power failure detection relay 13 goes out, and the normally closed contact /Ja opens, and the normally closed contact /? Since b closes,
The start command generating device/3 on the power outage side is connected to the travel command device 16. At this time, since the non-interference time by the start command generation device 13 is longer than that during normal power supply, the interval between elevator start commands sent from the start command generation device 13 becomes longer. For example, start command generator/j
The activation frequency is 50 times/hour. Furthermore, when a start command from the start command generator 13 is applied to the flight command generator/6, the inverter 3 is controlled by the speed command in the same way as in the case of normal power supply, and the elevator operates at a longer operation interval than in the case of normal power supply. It will be operated.

In this way, by lengthening the operation interval of the elevator (reducing the startup frequency), the amount of discharge of the battery per hour is reduced by a commensurate amount. In particular, reducing the number of activations in which a large current flows will reduce the total energy consumption of the battery, thereby increasing the operating time of the elevator during a power outage.

Furthermore, if the operating time of the elevator during a power outage is limited, the capacity of the battery can be reduced.

As described above, according to the present invention, the startup frequency during a power outage is lower than that during a normal power supply, so when the operating time is limited, the battery capacity can be reduced, and the size of the battery storage box is accordingly reduced. .

The capacity of the charger is also reduced, which is advantageous in terms of cost. Furthermore, if the battery capacity is fixed, the time during which the vehicle can be operated during a power outage can be increased.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of a conventional elevator system, and FIG. 2 is a configuration diagram showing an example of the elevator system of the present invention. l...power source, 3...charger, da...battery,! ... Inverter, 7... Three-phase induction motor, g.
...reducer, t... sheave, 10... four-p, //
...Cage, l...Counterweight, /3...Power failure detection relay, /lI...Start-up command generator during normal conditions, l
S...Start command generation device during power outage, /6...Travel command generation device, Iri...Speed command generation device, it...
Inverter control device. Note that the same reference numerals in the figures indicate the same or equivalent parts. Agent Masuo Oiwa (and 2 others) Spear 1 Figure I, Display of the case Patent Application No. 58-100434 28 Name of the invention Elevator device 3, Person making the amendment Relationship to the case Part 4 to Hitoshi Katayama, representative of the patent applicant , agent (:J':?, 'j, ゛, OF, ku213) 3121i
! 77f part) 5, Subject of amendment (1) Detailed description of the invention column in the specification (2) Drawing 6, Contents of amendment (1) On page 5, line 17 of the specification path, it says "output side", Correct as "input side". (2) On page 5, line 18, it says "command generation circuit".
Correct it to "command generation device." (3) Amend drawing #1 as shown in the attached sheet. 7. Attached documents (1) One amended drawing (2)

Claims (1)

[Claims] There is a charger that converts the elevator power source into a DC power source L1 A battery and an inverter capable of regeneration are connected to this charger, and a three-phase induction motor is connected to the above inverter, and power is supplied from the above battery when the elevator is in motion. In an elevator system that stores regenerated energy in the battery during regeneration so that the elevator can be operated both during normal power supply and during power outage, the elevator system includes means for setting the activation frequency during power outage to be lower than that during normal power supply. An elevator device characterized by: