JP2005015067A - Emergency operation device of elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an emergency operation device of an elevator capable of coping with a change in specifications after completing installation at minimum cost. <P>SOLUTION: This emergency operation device of the elevator comprises an inverter 5 powered from a commercial power supply 1, a control device 9 controlling the inverter 5, a motor 6 driven by the inverter 5 to operate an elevator car, and battery devices 10 and 30 for supplying power to the inverter 5 and the control device 9 in an emergency. In an emergency, to perform the rescue operation of the elevator car by the motor 6 by separating the commercial power supply 1 from the operation device and driving the control device 9 and the inverter 5 by power supply from the battery devices, the control device 9 comprises a determination means for switching the battery devices by determining the time of the excessive load operation of the motor. The battery devices raise the supplied power to the inverter 5 in excessive load operation. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an emergency operation device for an elevator that enables operation of an elevator car in an emergency, and particularly relates to an emergency operation device for an elevator that can cope with a change in operation specifications without causing an increase in cost. .
[0002]
[Prior art]
Conventional elevator emergency operation devices include a converter that converts a three-phase AC voltage from a commercial power source into a DC voltage, an inverter that converts a DC voltage from the converter into a three-phase AC voltage of variable voltage and variable frequency, and an inverter. Motor for driving an elevator driven by a three-phase AC voltage, a control circuit for controlling a transistor in the inverter and a switching element for regenerative power consumption, an AC / DC converter for supplying power to the control circuit, and a commercial power source A battery for operating at the time of a power failure, a charging device for charging the battery, a power source for the charging device, and a DC / DC converter for converting a DC voltage from the battery into an applied voltage to the control device ( For example, see Patent Document 1).
[0003]
In the above configuration, when the commercial power supply is normal, the inverter outputs the frequency and voltage according to the output of the control device to control the rotation speed and torque of the motor.
In addition, when electric power is regenerated from the motor, the control device detects a power regenerative state and conducts the switching element for regenerative power consumption through a resistor connected in series to the switching element. Use regenerative power.
[0004]
On the other hand, when a power failure occurs in the commercial power supply, a battery voltage for power failure operation is applied to the DC side of the inverter, and a battery voltage via a converter is applied to the DC side of the AC / DC converter. The As a result, a DC voltage is applied to the DC / DC converter, a DC voltage from the DC / DC converter is applied to the secondary side of the AC / DC converter, and power is supplied to the control device.
Therefore, the control device can control the inverter and the switching element for regenerative power consumption, and can control the torque and the number of rotations of the motor in the same way as when the commercial power supply is normal.
[0005]
By the way, in the event of a power failure, depending on the load condition of the elevator car, passengers may be rescued to the nearest floor in a driving state with less motor driving force (uploading with no load or downing when full) It has become. Therefore, since the power supplied to the motor during the rescue operation is small, the battery for driving the motor during a power failure is generally set to a small capacity.
[0006]
However, after completing the installation of the elevator system, for example, due to customer circumstances, when carrying out rescue transmission to the designated floor instead of the nearest floor in the event of a power failure, or in the direction of leaving the counter weight position during emergency operation in the event of an earthquake For example, when a driving request is generated, the required motor driving capacity increases.
In this case, the rescue operation time may be longer, and it is necessary to set a large battery capacity. In addition, it is necessary to replace the floor with a flooring device that can cope with a power outage or to make a major modification. .
[0007]
[Patent Document 1]
Japanese Patent Laid-Open No. 2-198994
[Problems to be solved by the invention]
As described above, the conventional emergency operation device for elevators basically considers operation in the light load direction as emergency operation such as a power failure, and the capacity and number of batteries are set to be small. Therefore, for example, when it is necessary to land on the designated floor due to specification changes after installation, it is necessary to increase the capacity and number of batteries by replacing the device, which is a great deal of modification to cope with specification changes. There was a problem that it required a large expense.
[0009]
The present invention has been made to solve the above-described problems, and is capable of responding to specification changes after installation is complete (for example, a customer request for returning to a specified floor, etc.) at a minimum necessary cost. The purpose is to obtain an emergency operation device for an elevator.
[0010]
[Means for Solving the Problems]
An emergency operation device for an elevator according to the present invention includes an inverter fed from a commercial power source, a control device that controls the inverter, a motor that is driven by the inverter to drive an elevator car, and feeds the inverter and the control device in an emergency. In an emergency operation device for an elevator, the control device and the inverter are driven by power supply from the battery device and the control device and the inverter are driven by power supply from the battery device. Includes determination means for determining when the motor is overloaded and switching the battery device, and the battery device increases the power supplied to the inverter during the overload operation.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment 1 FIG.
Hereinafter, the first embodiment of the present invention will be described in detail with reference to the drawings.
1 is a circuit block diagram schematically showing a first embodiment of the present invention.
In FIG. 1, an emergency operation device for an elevator includes a three-phase AC commercial power supply 1, a normally-open contact 2 of a contactor that is excited when the elevator travels, and a three-phase AC voltage from the commercial power supply 1 as a DC voltage. Converter 3 for converting to DC, capacitor 4 for smoothing the DC voltage output from converter 3, inverter 5 for converting DC voltage to three-phase AC voltage of variable voltage and variable frequency, motor 6 for driving the elevator, In order to consume regenerative power from the motor 6, a series circuit composed of a resistor 7 and a switching element 8 inserted on the DC terminal side of the inverter 5, a transistor in the inverter 5 and a switching element 8 for regenerative power consumption are controlled. Control device 9, battery 10 for power failure operation connected to the input terminal of converter 3, battery 10 and converter 3 And a normally open contact 11 of the contactor to be energized when the power is interposed between the next side.
[0012]
In addition, the emergency operation device for the elevator shown in FIG. 1 includes an AC / DC converter 17 that converts a three-phase AC voltage from a commercial power source 1 into a DC voltage and supplies power to the control circuit 9, and the commercial power source 1 and the AC / DC. A normally closed contact 18 interposed between the converter 17, a DC / DC converter 19 that converts a DC voltage from the battery 10 into a power supply voltage to the control device 9, a DC / DC converter 19, and a control device. 9, a normally open contact 20 interposed between the battery 9, a charging device 21 for charging the battery 10, a power supply 22 of the charging device 21, a battery 30 constituting an additional device, the battery 30 and the converter 3. A contactor normally-open contact 31 interposed between them and excited when the motor 6 is driven, and a charging device 32 for charging the battery 30 are provided.
[0013]
The normally closed contact 18 and the normally open contact 20 related to the relay excited at the time of a power failure are inserted and connected to the front stage of the AC / DC converter 17 and the rear stage of the DC / DC converter 19, respectively.
A battery 30 for driving the motor 6 at the time of a power failure, a normally open contact 31 of the contactor excited when the motor 6 is driven, and a charging device 32 for charging the battery 30 constitute an additional device according to the present invention.
[0014]
In addition, the control apparatus 9 takes in various sensor information including the load information from the load sensor of an elevator car, etc., and determines the load state of the motor 6 (during overload operation).
Further, the switching means (contacts of each contactor) of the battery device that operates at the time of a power failure (emergency) of the commercial power supply 1 is switched by a control signal from the control device 9.
[0015]
Next, the operation according to the first embodiment of the present invention shown in FIG. 1 will be described.
First, when the elevator car travels when the commercial power source 1 is normal, the normally open contact 2 is turned on by the contactor excitation.
At this time, as shown in the figure, the normally open contacts 11 and 20 are opened, and the normally closed contact 18 is closed.
Therefore, the inverter 5 outputs a three-phase AC voltage having a frequency and voltage corresponding to the control output from the control device 9 and controls the rotation speed and torque of the motor 6.
Further, when detecting the regenerative power from the motor 6, the control device 9 causes the switching element 8 to conduct and causes the resistor 7 to consume the regenerative power.
[0016]
On the other hand, when a power failure occurs in the commercial power source 1, the normally open contact 2 of the contactor cannot be turned on and is opened as shown.
At this time, the normally closed contact 18 is opened and the normally open contact 20 is closed by the relay excited during a power failure.
Further, the normally open contact 11 is closed by, for example, the electric power of the battery 10, whereby the output voltage of the battery 10 is applied to the primary (DC) side of the inverter 5 via the converter 3. The output voltage of the battery 10 is applied to the secondary (direct current) side of the AC / DC converter 17 via the converter 19.
[0017]
That is, with the occurrence of a power failure, the normally closed contact 18 is OFF and the normally open contact 20 is ON, so the controller 9 is supplied with a DC voltage from the DC / DC converter 19.
Therefore, even when the commercial power source 1 is out of power, the control device 9 controls the inverter 5 and the switching element 8 for regenerative power consumption to control the torque and the rotational speed of the motor 6 as in the case where the commercial power source 1 is normal. Can be controlled.
[0018]
In the event of an emergency such as a power failure of the commercial power supply 1, overload operation such as down operation with no load (no passengers), up operation in a full state, or rescue operation is long rather than the nearest floor When a large drive capacity of the motor 6 is required, such as when continuous operation is required, the normally open contact 31 is turned on without connecting the normally open contact 11, and the motor 6 is connected with the battery 30 of the additional device. Drive.
At this time, the DC / DC converter 19 serving as the power source of the control device 9 controls the constant voltage output by the power supply from the battery 10.
[0019]
When the input voltage of the converter 3 is set high during an overload operation, the output voltage of the converter 3, that is, the voltage of the smoothing capacitor 4 increases, and as a result, the output voltage of the inverter 5 can be increased, and the motor 6 rotates. The speed can be increased.
On the other hand, when operating at a low speed on the nearest floor, the normally open contact 11 is closed, the normally closed contact 31 is opened, and the voltage of the battery 10 lower than the normal output voltage of the converter 3 is applied. .
[0020]
In this way, by adding the additional devices 30 to 32, during overload operation (down operation with no load or up operation in a full state), the normally open contact 11 is prevented from closing, and the normally open contact Since 31 is closed, the control device 9 controls the inverter 5 and the switching element 8 for regenerative power consumption to control the torque and the rotational speed of the motor 6 as in the case where the commercial power source 1 is normal. be able to.
At this time, since the battery 30 of the additional device can supply a voltage value higher than that of the battery 10 to the motor, the passenger can be surely rescued to the designated floor even during overload operation.
Therefore, by changing the specifications after installing the elevator, it is possible to easily cope with the specified floor return operation only by incorporating and adding the battery 30 and the charging device 32 of the additional device to the use of the specified floor return. .
In addition, additional motor-driven devices can be added without changing the existing power failure operation device, so customers who are operating during a power failure such as returning to a specified floor can be easily done in a short time without major modifications. It can correspond to the specification.
[0021]
Embodiment 2. FIG.
In the first embodiment (see FIG. 1), during overload operation at the time of power failure, the power source of the converter 3 is switched from the battery 10 for normal power failure operation to the large capacity and high voltage battery 30. However, the battery 10 and the battery 30 of the additional device may be connected in series to supply power.
FIG. 2 is a circuit block diagram showing a second embodiment of the present invention in which the batteries 10 and 30 are connected in series during an overload operation, and is different from FIG. 1 in the additional device portion (the battery 30 in the additional device and the existing power failure). Only the main part configuration with the battery 10 for hourly operation) is shown.
[0022]
In FIG. 2, the same components as those described above (see FIG. 1) are given the same reference numerals as those described above, or “a” is added after the reference symbols, and detailed description thereof is omitted.
In this case, the ground terminal of the battery 30 of the additional device is connected to the common ground line and the normally open contact 11 via the switching contact 31a, and the anode terminal of the battery 30 of the additional device is connected to the battery 10 via the switching contact 31a. Connected to the ground terminal.
[0023]
The switching contact 31a selects the battery 10 and connects it to the normally open contact 11 as shown in the figure when the commercial power supply 1 is not in an overload operation during a power failure.
On the other hand, at the time of an overload operation at the time of a power failure, the switching contact 31a is excited to switch from the state shown in the figure, so that the batteries 10 and 30 are connected in series via the switching contact 31a and the boosted series voltage is converted to the converter. 3 is fed.
At this time, although the input voltage of the DC / DC converter 19 serving as the power source of the control device 9 also rises, there is no need to boost the power source voltage of the control device 9, so that the constant voltage control only by the battery 10 is performed. May be.
[0024]
In this way, separately from the standard battery 10, the additional battery 30 and the charging device 32, and the switching contact 31 a for applying a series voltage to the primary side of the converter 3 that is excited during overload operation are provided. By connecting in series the normal battery 10 serving as an emergency DC power supply and the battery 30 in the additional device during the rescue operation, a rescue operation corresponding to the customer specifications during the power failure operation (down operation without load, Or an up operation in a full state) can be easily realized.
That is, by applying the series voltage of the batteries 10 and 30 to the primary side of the converter 3 via the switching contact 31a and the normally open contact 11, a voltage higher than that of the battery 10 can be supplied to the motor. Passengers can be rescued to the designated floor.
[0025]
Embodiment 3 FIG.
In the first embodiment (see FIG. 1), the charging device 32 different from the existing charging device 21 is provided to charge the battery 30 having a large capacity and a high voltage. You may share with.
FIG. 3 is a circuit block diagram schematically showing Embodiment 3 of the present invention using a single charging device 32b, and the same components as those described above (see FIG. 1) are denoted by the same reference numerals. Or, “b” or “c” is added after the reference numerals, and the detailed description is omitted.
[0026]
In this case, the charging device 32b is powered by the power source 22b and charges both the two systems of batteries 10 and 30.
The normally open contact 11b is closed at the time of a power failure of the commercial power source 1 as described above.
Between the charging device 32b and the battery 30, a normally closed contact 18b of a relay that is excited at the time of a power failure of the commercial power source 1 is inserted.
A switching contact 31c is inserted between the normally open contact 31b and between the battery 10 and the normally open contact 11b. The switching contact 31c is normally connected to the battery 10 side as shown, and is connected to the normally open contact 31b (battery 30) side during overload operation.
[0027]
In FIG. 3, when a power failure occurs in the commercial power source 1, the normally closed contacts 18 and 18 b are opened (OFF) together with the normally open contact 2, and the normally open contacts 11 b and 20 are closed (ON).
At this time, the DC voltage from the battery 10 for normal power failure driving is input to the converter 3 via the switching contact 31c and the normally open contact 11b.
[0028]
On the other hand, during an overload operation, the normally open contact 31b is closed and the switching contact 31c is switched from the illustrated state.
Therefore, a DC voltage from the battery 30 (which is higher than the DC voltage of the battery 10) is input to the converter 3 via the normally open contact 31b, the switching contact 31c, and the normally open contact 11.
In this way, the same effect as described above can be achieved using the single charging device 32b.
[0029]
Embodiment 4 FIG.
In the third embodiment, the high-capacity and high-voltage battery 30 is switched as the power source of the converter 3 during the overload operation. However, as in the second embodiment, the series voltage of the batteries 10 and 30 is changed. May be supplied.
That is, during a power failure, the normally closed contact 18b (see FIG. 3) is opened (OFF), and the battery 30 of the additional device is disconnected from the charging device 32b, so that the battery 30 is connected in series with the battery 10. be able to.
Further, in this case, the voltage value of the battery 30 can be set to the same value (low voltage value) as that of the battery 10, so that the charging device 32b shared with the batteries 10 and 30 is further reduced in size and cost. Can do.
Further, in each of the above embodiments, the rescue operation at the time of a power failure has been described. However, it can be applied to the operation of detaching from the counterweight when an earthquake occurs, and it is needless to say that the same operational effects can be obtained.
[0030]
【The invention's effect】
As described above, according to the present invention, an inverter fed from a commercial power source, a control device that controls the inverter, a motor that is driven by the inverter to drive an elevator car, and feeds power to the inverter and the control device in an emergency. In an emergency operation device for an elevator, the control device and the inverter are driven by power supply from the battery device and the control device and the inverter are driven by power supply from the battery device in an emergency. Includes a determination means for determining when the motor is overloaded and switching the battery device. The battery device increases the power supplied to the inverter during overload operation. The emergency luck of an elevator that can be handled at the minimum necessary cost The effect of device is obtained.
[Brief description of the drawings]
FIG. 1 is a circuit block configuration diagram schematically showing a first embodiment of the present invention;
FIG. 2 is a circuit block diagram showing a main part according to a second embodiment of the present invention.
FIG. 3 is a circuit block diagram schematically showing a third embodiment of the present invention.
[Explanation of symbols]
1 commercial power source, 3 converter, 5 inverter, 6 motor, 9 control device, 10, 30 battery, 11, 11b, 20, 31, 31b normally open contact, 17 AC / DC converter, 18, 18b normally closed contact, 21, 32, 32b Charging device, 31a, 31c Switching contact.

Claims (9)

An inverter powered from a commercial power source;
A control device for controlling the inverter;
A motor driven by the inverter to drive an elevator car;
A battery device for supplying power to the inverter and the control device in an emergency,
In the emergency operation device for an elevator that disconnects the commercial power supply, drives the control device and the inverter by power feeding from the battery device, and performs the rescue operation of the elevator car by the motor,
The control device includes a determination unit for determining the overload operation of the motor and switching the battery device,
The emergency operation device for an elevator characterized in that the battery device increases power supplied to the inverter during the overload operation. The battery device is
A first battery serving as a power source in the emergency;
A second battery having a voltage value higher than that of the first battery;
The elevator according to claim 1, further comprising battery switching means for switching from the first battery to the second battery as a power source for the inverter during an overload operation in the emergency. Emergency driving device. The battery device is
First and second batteries serving as power sources in the emergency;
Battery switching means for switching the connection relationship of the first and second batteries to the inverter;
The battery switching means is
As a power source for the inverter in the emergency, supply a DC voltage from the first battery,
The emergency operation apparatus for an elevator according to claim 1, wherein a series voltage from the first and second batteries is supplied as a power source for the inverter during the overload operation. The emergency operation device for an elevator according to claim 3, wherein the voltage values of the first and second batteries are set to be the same. The emergency of the elevator according to any one of claims 2 to 4, further comprising first and second charging devices for individually charging the first and second batteries. Driving device. The emergency operation device for an elevator according to any one of claims 2 to 4, further comprising a single charging device for charging the first and second batteries. The emergency is a power failure of the commercial power supply,
7. The overload operation according to claim 1, wherein the overload operation is a down operation with no load of the elevator car or an up operation with the elevator car being full. The emergency operation device for an elevator according to item. The emergency is a power failure of the commercial power supply,
The emergency operation device for an elevator according to any one of claims 1 to 6, wherein the overload operation is a return operation of the elevator car to a designated floor. The emergency is when an earthquake occurs,
The emergency operation of the elevator according to any one of claims 1 to 6, wherein the overload operation is an operation in a direction away from a position of a counter weight of the elevator car. apparatus.

Images