JPH02138084A - Elevator emergency operation method during power outage - Google Patents

Abstract

PURPOSE:To improve the comfortableness to ride by storing the cage load signal detected at the time of an elevator start in a nonvolatile memory when the commercial power is normal and using the memory value for activation compensation during the emergency operation at the time of power outage. CONSTITUTION:When the emergency operation is to be performed at the time of power outage, the voltage wave-form of an inverter INV2 generating the three-phase AC power source from an emergency battery BAT is a distorted wave-form with fixed 50Hz, thus a ferroresonance type power unit ES for a load detector LD can not be excited. The output from the load detector LD is stored in the nonvolatile memory of a control device CONT when the commercial power 1 is alive, and the stored value of the load detector LD is used to perform the activation compensation during the emergency operation at the time of power outage. Since the load detected value before the power outage is stored, the light load direction at the time of the emergency operation can be judged. The comfortableness to ride of an elevator at the time of the emergency operation can be improved.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an emergency rescue operation method for an elevator during a power outage, and is particularly suitable for use in order to improve ride comfort when starting an emergency rescue operation. Elevators during power outages - related to emergency operation methods.

[Prior Art] As a conventional technology regarding an emergency rescue operation method for an elevator during a power outage, for example, the technology described in Japanese Patent Application Laid-Open No. 54-3749, Japanese Patent Application Laid-Open No. 59-198275, etc. is known. .

The prior art described in the former publication uses a mechanical load detection device to detect the light load direction during a power outage, and performs emergency rescue operation in the detected light load direction during a power outage. , the conventional technology described in the latter publication converts DC power from an emergency power source such as a battery into AC power at a predetermined frequency using an inverter, and converts this AC power into a normal power source equipped with an emergency rescue operation means. It is designed to be supplied to an operation control device. In addition, as another conventional technology, the elevator load and operating direction during a power outage.

A method is also known in which driving speeds are stored in a non-volatile memory and used to determine the driving direction during emergency driving.

[Problems to be Solved by the Invention] The above-mentioned conventional technology has the following problems when performing an emergency rescue operation during a power outage:
No consideration was given to starting compensation, and if the elevator system has low inertia or the hoisting machine is highly efficient, the problem is that the shock when starting the elevator is large. have. Moreover, the above-mentioned conventional technology is used during emergency operation.

In order to reduce the power capacity during operation, the car is operated in the light load direction, but in order to determine the direction, a mechanical load detection switch must be installed under the car to detect the light load direction. There was a problem that it had to be done.

An object of the present invention is to solve the problems of the prior art, to easily determine the direction of light load operation and to perform start-up compensation during emergency rescue operation during a power outage, and to improve the efficiency of elevator operation during emergency rescue operation. An object of the present invention is to provide an emergency operation system for an elevator during a power outage, which can improve the riding comfort of an elevator.

[Means for Solving the Problems] According to the present invention, the object is to store a starting compensation value used at starting or a car self-load detection value in a non-volatile memory during operation during normal power supply. When operating with emergency power during a power outage, the output of the car self-load detection device is disabled, and instead, the car self-load detection value stored in the non-volatile memory before the power outage or startup compensation is used. This value is used to perform start-up compensation during emergency operation, and the car self-load detection value before the power outage stored in the non-volatile memory and the difference between the elevator and counterweight are used to determine the direction of light load. This is achieved by detecting.

[Operation] The power supply device that supplies voltage to the load detector provided under the car is generally a stabilized power supply device of the ferroresonant type. When performing emergency operation during a power outage, the voltage waveform of the inverter that generates three-phase AC power from the emergency battery is a distorted waveform and a constant 50Hz, so a fero-resonant type power supply device for the load detector is required. cannot be supplied with three-phase AC power during emergency operation. Therefore,
During emergency operation of the elevator during a power outage, power cannot be supplied to the load detector and load detection cannot be performed. Therefore, the present invention stores the output from the load detector in a non-volatile memory when the commercial power supply is live, and when a power outage occurs, the load detector stored in the non-volatile memory at the time of startup before the power outage is detected. Startup compensation during emergency operation is performed using the value of the device. Furthermore, by storing the load detection value before the power outage, it is possible to determine the light load direction during emergency operation. This results in
The present invention can improve the ride comfort of an elevator during emergency operation.

[Example] Hereinafter, an example of an elevator emergency operation system during a power outage according to the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, and FIG. 2 is a time chart explaining the operation. In Figure 1, 1 is a commercial power supply, 11□~11, llA3~l
lA3, 12□, 12□, 12A~12A3 are normally closed contacts of the contactor, 12A4 is the normally closed contact of the contactor, INVl is the first inverter, INV is the second inverter, IM
is the electric motor, MC is the hoisting machine, C is the car, W is the counterweight, TR is the power transformer, ES is the AC stabilized power supply, L
D is a load detector, C0NT is a control device, and BAT is a battery.

In the structure of an embodiment of the present invention shown in FIG. 1, an elevator car C is arranged in a spiral manner via a counterweight W and a hoist MC.

The electric motor IM for opening the hoisting machine MC is a well-known first motor that supplies a predetermined electric power to the electric motor M to control the elevator.
Inverter INV, normally open contacts 111-11 of the contactor
．． It is connected to the commercial power line WX1 via. Normally open contacts 11□~11. is the contact point of the contactor that turns on when commercial power is supplied, and during normal operation, commercial power supply 1 is turned on.
is supplied to the first inverter INV. Normally open contacts 11A1 to 11A3 of the contactor, which are turned on when similar commercial power is supplied, are also provided between the power transformer TR and supply the commercial power 1 to the power transformer TR. The control device C0NT controls the entire elevator system, and receives power from the power transformer TR.

Battery BAT, which serves as an emergency power source during a power outage, is
It is connected to the AC input side of the first inverter INV, which controls the inverter M, via contacts 121 and 122 of the contactor, and supplies AC power to the power transformer TR, which supplies power to the control device C0NT during a power outage. The second inverter INV2 is connected to the second inverter INV2. contactor contacts 120
, 12□ and 12A ~ 12A are the normal state of the contactor that turns on when the output of the second inverter INV, which generates emergency AC power during a power outage of the commercial power supply 1, exceeds a predetermined value. It is an open contact and is turned on during emergency operation of the elevator during a power outage of the commercial power supply 1.

A load detector LD for detecting the load in the car is provided under the floor of the elevator car C, and the output of this load detector LD is used for startup compensation during normal operation. Since this load detector LD uses a well-known differential transformer and requires a stable supply of AC power, it requires a special AC stabilized power supply ES as its power source. Since this AC stabilized power supply ES uses a fero-resonant type, it is impossible to use 50Hz and 60Hz, and even if the input AC is a square wave or has large distortion, its characteristics will be distorted. occurs, so during emergency operation during a power outage of the commercial power supply 1, the output of the second inverter Nv2 will be 50H.
z only, and the voltage waveform is a rectangular wave, so the second
Inverter INV.

It is meaningless even if power is supplied from the Therefore, the supply of power to the AC stabilized power supply ES is cut off by the normally closed contact 12A4 of the contactor, which is turned on during emergency operation. Therefore, during an emergency operation, the power supply to the load detector LD is stopped, and if this continues, it is impossible to compensate for the start of the elevator during an emergency operation. In addition, battery B for emergency operation
In order to reduce the capacity of the AT, it is necessary to set the emergency operation direction to the light load direction of the unbalance between the elevator car C and the counterweight W, but this light load direction must be determined by some means. There is a need to.

In one embodiment of the invention configured as described above, while the commercial power supply 1 is live, the contactors 111-11.
, 11A1 to 11A2 are turned on, and the first inverter INV applies the commercial power 1 to the power transformer TR, and the control device C0NT is also supplied with power via the power transformer TR. Also.

AC voltage is also applied to the AC stabilized power supply ES, and the load detector LD under the car is also activated. The control device C0NT uses the detection value from the load detector LD to compensate for the start of the elevator using a well-known method, and starts the first inverter I.
NV, supplies AC power to the electric motor IM, and controls the operation of the elevator car C. Control device C
During normal operation control, the 0NT rewrites and holds the detected value of the car load detected by the load detector LD in its internal nonvolatile memory each time the elevator is started.

When the commercial power supply 1 is cut off while the elevator is in operation, the elevator first makes an emergency stop using a well-known method. At that time, the normally open contacts 11□ to 11. .

11A1 to 11A3 are turned off, and the second inverter INV connected to the battery BAT, which is an emergency power source, is turned off.
, starts working. The second inverter ■Nv2 converts the DC power from the battery BAT into 50 Hz three-phase AC power. When this AC output rises to a predetermined level, the normally open contacts 121, 12□, 12 At-
12A□ is turned on, and normally closed contact 12A4 is turned off.

In this state, the control device C0NT can receive emergency power from the second inverter INV2 via the power transformer TR and control the elevator, and the first inverter INV1 can battery bat
The control device C0NT receives DC power from the
According to the instructions, it is possible to convert the AC power into variable voltage, variable frequency AC power and feed it to the electric motor IM for driving one of the cars C. In addition, in this case, the AC stabilized power supply E
When the contact 12A4 is turned off, the power supply to the car S is cut off, and therefore the load detector LD provided under the floor of the car C is in an inoperable state.

In this state, the control device C0NT starts an emergency rescue operation of the elevator, which had stopped in an emergency after the commercial power supply 1 was cut off. The detected value of the load detector LD at the time of the last startup is used. Control device C0
As described above, when the commercial power supply 1 is normally applied and normal elevator control is performed, the NT performs startup compensation using the detected value of the load detector LD each time the elevator is started. However, the detected value of the load inside the car by this load detector LD is stored in a RAM backed up by a battery.
<random access memory), etc.). The load inside the elevator car during emergency rescue operation during a power outage of commercial power supply 1 is equal to the load inside the car at the last startup when the commercial power supply was alive (
(This is because the passengers who were in the elevator at the time of the last startup when the commercial power supply was live will be subject to emergency rescue). Start-up compensation can be performed using the detected value of the load detector LD at the last start-up when the engine was running, and thereby it is possible to perform optimal start-up compensation even during emergency operation. In addition, the driving direction during emergency operation can be determined based on the stored car load.
The light load direction can be easily determined and found.

In the embodiment of the present invention described above, the detected value of the car load at startup when the commercial power supply is normal is stored in a non-volatile memory, and the startup compensation for emergency rescue operation in the event of a power outage of the commercial power supply is performed. Although this is carried out using this stored car load, the present invention uses data stored in a non-volatile memory as a starting compensation value such as starting compensation torque at the last starting when the commercial power supply is normal. Good too.

FIG. 2 is a time chart showing the operation of the embodiment of the present invention described above.

In FIG. 2, when the elevator is started with the commercial power supply 1 active, the contactors 11□~
11. , 11A1 to 11A2 are turned on, and the AC stabilized power supply ES is also in an operating state. When the elevator door closes, the door signal is turned on, and based on the detection signal LDM of the load detector LD at that time, the elevator start compensation torque 5TTRQ is applied, and the elevator starts operating and is accelerated. . The value of the load detector LD at this time,
Alternatively, the startup compensation signal is stored in a battery-backed RAM or the like as a memory signal LDMH.

When a power outage occurs in commercial power supply 1, contactor contacts 11□~
11. , 11A1-11A are turned off, the elevator comes to an emergency stop, and the AC stabilized power supply ES becomes inoperable.

Thereafter, when the second inverter INv2 becomes operational, the contacts 12□ to 12□ of the contactor.

12A□ to 12A3 are turned on, and 12A4 is turned off. The control device C0NT uses the memory signal L DMH of the detected value of the load detector detected at the previous startup,
An elevator that has performed start compensation by determining the light load direction for emergency operation and applying start compensation torque 5TTRQ.
Perform emergency operations.

In addition, in the embodiment of the present invention described above, it is also possible to store and use the detection value of the load detector LD at the moment of a power outage in the commercial power supply 1 in a non-volatile memory. This is not a good idea because the LD is affected by the acceleration/deceleration of the running elevator, making it difficult to accurately detect the load inside the car.

The embodiment of the present invention described above is particularly effective when the hoisting machine MC is not configured with a worm gear or the like, but is configured with a helical gear or the like with good reverse drive efficiency, and is particularly effective when the hoisting machine MC is configured using a helical gear or the like with good reverse drive efficiency. It is possible to perform an emergency operation of an elevator without causing a feeling of anxiety to a user by eliminating a starting shock when the elevator is started. Further, a mechanical switch for direction determination for determining the emergency driving direction can also be eliminated.

[Effects of the Invention] As described above, according to the present invention, it is possible to compensate for starting the elevator even during emergency operation during a commercial power outage, and to improve ride comfort.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention, and FIG. 2 is a diagram illustrating the operation. 1...Commercial power supply, 11□~11. , IIA□~
lIA,, 121.122.12A, ~12A,...
... Normally closed contact of contactor, 12A, ... Normally closed contact of contactor, INVl ... First inverter, INV, ... Second inverter ,IM...
...Electric motor, MC...Hoisting machine. C: Car, W: Balance weight, TR: Song/power transformer, ES: AC stabilized power supply, LD: Load detector , C0NT...
...Control device, BAT...Battery. m1 figure figure 2 direction middle 1 餠

Claims (1)

[Scope of Claims] 1. In an elevator system equipped with an inverter that controls the drive of an elevator drive motor and a battery for emergency operation used in the event of a power outage of commercial power, an elevator is detected when the commercial power is normal and the elevator is started. A car load signal is stored in a non-volatile memory, and during an emergency operation during a commercial power outage, the car load signal stored in the non-volatile memory is used to perform startup compensation. Elevator emergency operation method. 2. The elevator emergency during a power outage according to claim 1, characterized in that, instead of the car load signal, a startup compensation signal used when starting the elevator when the commercial power supply is normal is stored in a nonvolatile memory. Driving method. 3. The light load direction during emergency operation is determined based on the car load signal or start-up compensation signal stored in the non-volatile memory.
Elevator emergency operation method in case of power outage as described in section. 4. During an emergency operation during a power outage, power supply to the load detector that detects the car load signal is stopped during a power outage according to claim 1, 2, or 3. Elevator emergency operation method.