JP3406361B2 - Elevator blackout operation device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator power failure operation device.

[0002]

2. Description of the Related Art In recent years, an inverter has been used to control an electric motor for driving an elevator for the purpose of reducing power consumption and the like. Even when a power failure occurs, a battery is connected to the DC side of this inverter to cause a power failure. It is proposed to drive at times.

The configuration of a conventional elevator power failure operating device will be described with reference to FIG. FIG. 10 is a diagram showing a configuration of a conventional elevator power failure operating device disclosed in, for example, Japanese Patent Publication No. 1-44631.

In FIG. 10, reference numeral 1 is, for example, a three-phase alternating current 20.
0V or 400V commercial power source, 2 is a no-fuse breaker for supplying the commercial power source 1 to the elevator control device, 3
Is a normally open contact of a contactor that is excited during traveling of the elevator, 4 is a converter that converts the commercial power supply 1 into direct current, 5 is an electrolytic capacitor that smoothes the output voltage of the converter 4,
Reference numeral 6 is an inverter for converting a DC voltage into a three-phase AC voltage having a variable voltage and a variable frequency of 0 to 200 V and 0 to 60 Hz, 7 is an induction motor for driving an elevator, and 8 and 9 consume regenerative electric power from the induction motor 7. Resistors and transistors for doing so.

Further, 10 is an elevator control circuit for controlling the transistors of the inverter 6 and the transistor 9 for regenerative power consumption, 11 is a transformer for supplying power to the control circuit 10, and 12 is a battery of 48 V, for example, for operation during a power failure. , 13 are normally open contacts of the contactor that are excited during a power failure,
Reference numeral 14 denotes a diode for preventing reverse voltage from being applied to the battery 12, 15 denotes an inverter including a step-up transformer, which converts a DC voltage from the battery 12 into an AC voltage of three-phase AC 200V or 400V, for example. Reference numeral 17 denotes a normally open contact and a normally closed contact of a relay which are inserted and connected to the front stage of the transformer 11 and are excited in the event of a power failure.

The elevator control circuit 10 is supplied with a plurality of AC power supplies from a transformer 11. For example,
AC 37V is supplied and rectified to generate DC 48V. Also, from another supplied AC power supply, DC of 5V for CPU and DC of + 12V, -12 for analog circuit
V is generated inside the elevator control circuit 10.

Next, the operation of the above-described conventional elevator power failure operating apparatus will be described with reference to FIG. First, when the commercial power supply 1 is normal, the normally open contact 13 and the normally open contact 16 are open, and the normally closed contact 17 is closed, so that the inverter 6 operates at a frequency corresponding to the output of the elevator control circuit 10. A voltage is generated to control the rotation speed and torque of the induction motor 7. Further, when electric power is regenerated from the induction motor 7, the elevator control circuit 10 detects it and causes the transistor 9 to be conductive so that the resistor 8 consumes the regenerated electric power.

On the other hand, when the commercial power source 1 is out of power, the contactor is excited by the power from the emergency standby power source and the normally open contact 13 of the contactor is closed to connect the battery 12 of the battery 12 to the DC side of the inverter 6 via the diode 14. For example, the output voltage of 48V is applied, and the output voltage of the battery 12 is also applied to the DC side of the inverter 15. As a result, the inverter 15 generates an AC voltage of, for example, three-phase AC 200V or 400V.

Further, the relay is excited and its normally-closed contact 17
Is open and the normally open contact 16 is closed, the transformer 11
The AC voltage, which is the output of the inverter 15, is applied to the primary side of the inverter 15 to supply power to the elevator control circuit 10. Therefore, the elevator control circuit 10 controls the inverter 6 and the regenerative power consumption transistor 9 in the same manner as when the commercial power supply 1 is normal to control the torque and the rotation speed of the induction motor 7.

[0010]

SUMMARY OF THE INVENTION In the conventional elevator power failure operating apparatus as described above, the inverter 15 is required exclusively for the power failure operation, and at the same time, a contactor that is detected when the power failure occurs or is excited when the power failure occurs. There is a problem that a circuit and a power supply for controlling the relay and the like are required.

The power source of the elevator control circuit 10 is
Since the power is supplied through the normally open contact 16 after the power is cut off after the power failure, the elevator control circuit 10
Has been reset, and for that reason, a circuit for giving power failure information to the elevator control circuit 10 is also required, and there is a drawback that it takes time before the rescue operation is started after a power failure and promotes anxiety of passengers.

The present invention has been made in order to solve the above problems, and an object thereof is to reduce the number of devices specifically required for operation during a power failure and to provide the operation function during a power failure with an inexpensive structure. (EN) An elevator power failure operation device that can be realized and can immediately shift to rescue operation after a power failure.

[0013]

[0014]

In an elevator power failure operating apparatus according to claim 1 of the present invention, an elevator control circuit for controlling an inverter circuit by operating with a single DC power source obtained by converting an AC power source. A power supply circuit that converts the commercial power supply to supply the single DC power supply to the elevator control circuit, and a battery that is used for rescue operation during a power failure and that outputs a voltage substantially the same as the single DC power supply. A first battery connection circuit connecting to the inverter circuit via a first power failure contact point, and a second battery connection connecting the battery to the power circuit element via a second power failure contact point. A circuit, the power supply circuit converts the alternating current power supply in which no abnormality occurs in the operation of the elevator control circuit from the occurrence of a power failure until the direct current power supply of the battery is supplied. A single DC power source, and when the elevator control circuit detects a power failure, the second power failure contact is closed and the DC power source for the battery is supplied through the second battery connection circuit. When the power is supplied to the power circuit and a stop between floors is detected, the first
The power supply contact at the time of power failure is closed, and the DC power of the battery is supplied to the inverter circuit through the first battery connection circuit.

In the elevator power failure operating device according to claim 2 of the present invention, when the second power failure power supply contact is closed, an inter-floor stop is detected and the commercial power supply is restored from the power failure. When it is detected that the commercial power supply has recovered from the power failure by closing the first power supply contact at the time of power failure and supplying the DC power of the battery to the inverter circuit through the first battery connection circuit. It is equipped with an elevator control circuit that closes the power supply contact when detecting.

In the elevator power failure operating device according to claim 3 of the present invention, when the second power failure power supply contact is closed, an inter-floor stop is detected and the output voltage of the converter circuit is changed. An elevator control circuit is provided which closes the first power supply contact during a power failure and supplies the DC power of the battery to the inverter circuit through the first battery connection circuit when it is detected that the voltage has dropped to a predetermined value.

In the elevator power failure operating device according to claim 4 of the present invention, the electrolytic capacitor for smoothing the output of the converter circuit and the smoothed DC voltage are converted into a variable voltage and a variable frequency AC voltage. An inverter circuit configured of an inverter for controlling an induction motor for driving an elevator and a resistor and a transistor which are connected in parallel to the electrolytic capacitor and consume regenerative power from the induction motor; and a second power supply contact at the time of power failure are closed. After a lapse of a predetermined time, it is provided with an elevator control circuit which conducts the transistor and forcibly discharges the electrolytic capacitor through the resistor when it is detected that the commercial power supply is not restored.

In the elevator power failure operating device according to claim 5 of the present invention, when it is detected that the commercial power supply is restored after the second power failure power supply contact is closed, or the commercial power supply is used. It is provided with an elevator control circuit for opening the second power supply contact at the time of power failure after a predetermined time has elapsed even when the power is not restored.

[0019]

[0020]

In the elevator power failure operating apparatus according to the first aspect of the present invention, the inverter circuit is controlled by the elevator control circuit that operates with a single DC power source obtained by converting the AC power source, and the power source circuit is used. The commercial power source is converted and the single DC power source is supplied to the elevator control circuit. Further, the first battery connection circuit connects a battery, which is used for rescue operation at the time of power failure and outputs substantially the same voltage as the DC single power source, to the inverter circuit via the first power failure contact point. The second battery connection circuit connects the battery to the power supply circuit via the second power failure contact. Further, a single DC power source obtained by converting an AC power source in which no abnormality occurs in the operation of the elevator control circuit from the occurrence of a power failure to the supply of the DC power source of the battery by the power source circuit. Is supplied. When a power failure is detected by the elevator control circuit, the second power failure power supply contact is closed to supply the DC power of the battery to the power supply circuit through the second battery connection circuit, and When the inter-floor stop is detected, the first power failure power supply contact is closed, and the DC power of the battery is supplied to the inverter circuit through the first battery connection circuit.

[0021] In a power failure during operation device for an elevator according to claim 2 of the present invention, the elevator control circuit, when the second power failure power supply contacts are closed,
When an inter-floor stop is detected and it is detected that the commercial power supply has not recovered from a power failure, the first power failure power supply contact is closed and the DC power source of the battery is converted to the inverter circuit through the first battery connection circuit. When the supply of the commercial power is detected to be restored from the power failure, the power supply contact is closed.

In the elevator power failure operating device according to claim 3 of the present invention, when the second power failure power supply contact is closed by the elevator control circuit,
When the inter-floor stop is detected and it is detected that the output voltage of the converter circuit has dropped to a predetermined value, the first power supply contact at the time of power failure is closed and the DC power source of the battery is converted into the inverter circuit through the first battery connection circuit. Is supplied to.

In the elevator power failure operating device according to claim 4 of the present invention, the commercial power supply is restored after a predetermined time has elapsed since the second power failure contact was closed by the elevator control circuit. When the absence is detected, the regenerative resistance energizing transistor is turned on, and the electrolytic capacitor that smoothes the output of the converter circuit is forcibly discharged through the resistor that consumes the regenerative power from the induction motor.

In the elevator power failure operation device according to claim 5 of the present invention, it is detected by the elevator control circuit that the commercial power supply has been restored after the second power failure power supply contact is closed. When the power is off or when the commercial power is not restored, the second power failure power supply contact is opened after a lapse of a predetermined time.

[0025]

【Example】

Example 1. The configuration of an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a diagram showing the overall configuration of an embodiment of the present invention, which includes a commercial power source 1 to a regenerative power consumption transistor 9, a transformer 11 to a diode 14.
Is similar to that of the conventional device described above. Also, FIG.
FIG. 3 is a diagram showing the configuration of part of an elevator control circuit according to an embodiment of the present invention. In each figure, the same reference numerals indicate the same or corresponding parts.

In FIG. 1, 10A is an elevator control circuit, 20 is an output of the transformer 11, for example, a rectifier for rectifying 37V alternating current to output, for example, 48V direct current, and 21 smooths the output of the rectifier 20. For smoothing (electrolytic capacitor), 22 is a normally open contact of a relay for connecting the battery 12 to the output side of the rectifier 20, and 23 is a reverse voltage application block for blocking reverse voltage from being applied to the battery 12. It is a diode for.

The elevator control circuit 10A is supplied from the rectifier 20 with a single power source having substantially the same voltage as the voltage of the battery 12. For example, 48 V DC is supplied from the rectifier 20, and is internally converted to a 5 V DC power supply for CPU and +12 V, -12 V DC power supply for analog circuits.

In FIG. 2, 30 is a CPU that controls the entire elevator, 31 is a ROM storing a program,
Reference numeral 32 is a RAM for temporarily storing data, and 33 is a bus for transmitting signals. Reference numeral 34 is a commercial power source presence / absence detection circuit that detects the presence / absence of the commercial power source 1 depending on whether the output voltage of the rectifier 20 is 0V, for example. Furthermore, 36, 38
And 39 are interfaces (I / F), 13a is a contactor coil of the normally open contact 13, and 22a is a normally open contact 22.
It is a relay coil.

[0029]

The converter circuit according to claim 1 of the present invention this is, in the first embodiment is composed of the molded case circuit breaker 2 converter 4, an inverter circuit according to claim 1 of the present invention, in the first embodiment the electrolyte The elevator control circuit according to claim 1 of the present invention, which includes the capacitor 5, the inverter 6, the resistor 8 and the transistor 9, corresponds to the elevator control circuit 10A in the first embodiment, and the power supply according to claim 1 of the present invention. circuit, in example 1 transformer 11, is composed of a rectifier 20 and a smoothing capacitor 21, a battery according to claim 1 of the present invention corresponds to the embodiment 1, a battery 12, a first aspect of the present invention
The first power supply contact during power failure according to the first embodiment corresponds to the normally open contact 13 in the first embodiment, and the first contact according to claim 1 of the present invention.
The battery connection circuit of No. 1 has a normally open contact 13 in the first embodiment.
And it is composed of a diode 14, a first aspect of the present invention
The second power supply contact at the time of power failure according to the second embodiment corresponds to the normally open contact 22 in the first embodiment, and the second contact according to claim 1 of the present invention.
In the first embodiment, the battery connection circuit of is a normally open contact 22.
And a diode 23.

Next, the operation of the above-described embodiment will be described with reference to FIG. FIG. 3 is a flow chart showing the operation of the embodiment of the present invention.

When the commercial power source presence / absence detecting circuit 34 detects a power failure in step 50, the CPU 30 energizes the relay coil 22a in step 51 to close the normally open contact 22 and close the battery 12 to the diode 23. Is connected to the output side of the rectifier 20 via.

If it is determined in step 52 that the elevator is stopped between floors by the signal from the position switch in the zone where the door does not open, in step 53 a command for the power-saving rescue operation is issued to the inverter 6. rear,
By exciting the coil 13a of the contactor, the normally open contact 13 is closed and the battery 12 is connected to the diode 14a.
To the output side of the converter 4 via. Then, in step 54, the elevator is driven to the nearest floor by the power-saving rescue operation, the door is opened, and the passenger is rescued.

In FIG. 1, when a power failure occurs, the output voltage of the rectifier 20 is the same as the electrostatic capacitance (C1) of the smoothing capacitor 21 connected to the output side of the rectifier 20 and the load resistance of the elevator control circuit 10A. (Current consumption) (R
It decreases with the relationship (time constant T1 = C1 · R1) determined by 1). Therefore, in the electrostatic capacity of the smoothing capacitor 21, the relay coil 22a is excited after the power failure occurs, the normally open contact 22 is closed, and the battery 12 is connected to the diode 23.
Until it is connected to the output side of the rectifier 20 via
A value is selected so that the output voltage of the rectifier 20 does not drop to a value at which no abnormality occurs in the operation of the elevator control circuit 10A.

Since the first embodiment has the structure as described above, conventionally, in order to realize the operation at the time of power failure, the inverter for making the power source of the elevator control circuit is required exclusively and at the time of the power failure. A circuit and power supply were needed to control the contactors and relays that were excited,
These can be eliminated.

Further, since the power supply of the elevator control circuit 10A is not constructed so as to be supplied again after being temporarily lost after a power failure as in the conventional case, the elevator control circuit 10A is not provided.
A does not need to be reset, and therefore there is no need to provide a dedicated circuit for giving the elevator control circuit 10A that there is a power outage, and the time before starting rescue operation after a power outage can be shortened, and passengers' anxiety Can be relieved.

That is, in the first embodiment, as described above, the no-fuse breaker 2 for supplying the commercial power source 1 which is an alternating current to the elevator, the converter 4 for converting the commercial power source 1 into the direct current, the converter 4 and the no-fuse. Breaker 2
A normally open contact 3 of the contactor inserted between the two, an electrolytic capacitor 5 connected between the DC buses that are the output side of the converter 4, and an inverter 6 that is also connected to the DC bus and reconverts DC into AC. An elevator driving induction motor 7 driven by a variable voltage / variable frequency AC voltage output from the inverter 6, a regeneration resistor 8 for consuming regenerative electric power from the induction motor 7, and a current-carrying transistor 9 thereof. An elevator equipped with an elevator control circuit 10A for controlling the entire elevator, a battery 12 used for rescue operation during a power failure, and a contactor normally open contact 13 for connecting the battery 12 to the DC bus of the converter 4. Of the elevator control circuit 10A, the inverter 6, the brake, the door, etc. The power of the circuit needed to rescue operation of,
A power supply circuit (transformer 11, rectifier 20, and smoothing capacitor 21) supplied by a single power supply having a voltage substantially the same as the voltage of the battery 12, a commercial power supply presence / absence detection circuit 34 for detecting the presence / absence of the commercial power supply 1, When the commercial power source presence / absence detection circuit 34 detects a power failure, the battery 12
Is further provided with a connection circuit (reverse voltage application blocking diode 23, normally open contact 22 thereof) for connecting to the power supply circuit.

Example 2. The configuration of another embodiment of the present invention will be described. The configuration of another embodiment of the present invention is similar to that of the above-described first embodiment.

Next, the operation of the other embodiment will be described with reference to FIG. FIG. 4 is a flow chart showing the operation of another embodiment of the present invention.

In step 60, it is judged whether or not the relay coil 22a is excited by the detection of the power failure by the commercial power source presence / absence detection circuit 34, and in step 61, the elevator is instructed by the signal from the position switch in the zone where the door does not open. Determine if it is stopped for a while.

If the commercial power source presence / absence detection circuit 34 detects in step 62 that the commercial power source 1 is not recovered at that time, in step 63 and step 64, the inverter 6 outputs a command for rescue operation during a power failure.
After that, the coil 13a of the contactor is excited to carry out a rescue operation during a power failure.

On the other hand, if the commercial power source presence / absence detection circuit 34 detects in step 62 that the commercial power source 1 is recovered at that time, in step 65, the relay coil 22a is demagnetized and the rescue operation at the time of power failure is performed. After issuing a command to the inverter 6, the normally-open contact 3 is closed to perform a normal rescue operation using the commercial power supply 1.

In the second embodiment, by doing so, it is possible to prevent unnecessary discharge of the battery 12 by the rescue operation using the battery 12 even when the commercial power supply 1 is restored. it can. In addition, the battery 12
Since the speed of rescue operation using the battery 12 is set lower than the speed of rescue operation using the commercial power source 1 due to the limitation of the capacity of, the rescue time of the rescue operation using the commercial power source 1 is reduced. It can be shortened.

That is, in the second embodiment, as described above, the commercial power source 1 is not restored by the commercial power source presence / absence detection circuit 34 while the connection circuit is operating and the elevator is stopped between floors. When it is detected that the coil 13a is excited and the normally open contact 13 is closed to perform rescue operation during a power failure, and when it is detected that the commercial power source 1 is restored, the normally open contact 3 is closed, The normal rescue operation using the commercial power source 1 is performed.

Example 3. The structure of another embodiment of the present invention will be described with reference to FIGS. FIG. 5 is a diagram showing the configuration of another embodiment of the present invention, which is the same as that of the first embodiment described above except the elevator control circuit 10B. Further, FIG. 6 is a diagram showing a partial configuration of an elevator control circuit 10B according to another embodiment of the present invention.
U30 to commercial power source presence / absence detection circuit 34, interfaces (I / F) 36, 38, 39, contactor coil 13
The relay coil 22a and the relay coil 22a are the same as those in the first embodiment.

In FIG. 6, 35 is a DC bus voltage detection circuit for detecting a voltage drop between the DC buses on the output side of the converter 4, and 37 is an interface (I / F).

Next, the operation of the other embodiment described above will be described with reference to FIG.
Will be described with reference to. FIG. 7 is a flow chart showing the operation of another embodiment of the present invention.

In step 70, it is judged whether or not the relay coil 22a is excited by the detection of the power failure by the commercial power source presence / absence detection circuit 34, and in step 71, the elevator is instructed by the signal from the position switch of the zone where the door is not opened. Determine if it is stopped for a while.

Even if it is determined in step 72 that the elevator power failure rescue operation command has not been issued to the inverter 6, in step 73 the DC bus voltage detection circuit 35 causes the DC bus on the output side of the converter 4 to be output. When it is determined that the voltage between them is less than the predetermined value of 48 V, for example, the coil 13a of the contactor is excited in step 74, the normally open contact 13 is closed, and the battery 12 is connected to the DC side of the output side of the converter 4. Connect to the busbar,
Carry out rescue operation during a power failure of the elevator.

In the third embodiment, by doing so, even if the time until the command for the rescue operation during the power failure of the elevator is issued for some reason after the floor stop due to the power failure, the DC bus The voltage has a predetermined value (for example, 48
V) Since the normally open contact 13 of the contactor is turned on in advance when the voltage becomes V or less, the inrush current to the electrolytic capacitor 5 can be prevented, and it is not necessary to install a reactor for preventing the inrush current. If the predetermined value is set to be equal to or higher than the voltage of the battery 12, no rush current flows into the electrolytic capacitor 5.

That is, in the third embodiment, as described above, the DC bus voltage detection circuit 35 is provided, and when the voltage of the DC bus drops to a predetermined value in a state where the floor is stopped due to a power failure, the elevator Even if there is no command for rescue operation during a power failure, the coil 13a of the contactor is excited and its normally open contact 13 is closed to connect the battery 12 to the DC bus which is the output side of the converter 4.

Example 4. The configuration of another embodiment of the present invention will be described. The configuration of another embodiment of the present invention is similar to that of the above-described first embodiment.

Next, the operation of the other embodiment will be described with reference to FIG. FIG. 8 is a flow chart showing the operation of another embodiment of the present invention.

After the operation of the above-described first embodiment is completed, that is, after the conditions are met and the rescue operation at the time of power failure is performed, the following operation is performed.

In step 80, the relay coil 22
a is excited for a predetermined time (for example, 1 to 1 of rescue operation).
If it is determined that the commercial power source presence / absence detection circuit 34 is out of power in step 81, it is determined in step 82 that the transistor 9 is turned on for a predetermined period of time, whereby the electrolytic capacitor (C2) The electric charge remaining in 5 is discharged by the regenerative resistor (R2) 8. The conduction time T2 of the transistor 9 is
The time is set such that the voltage of the electrolytic capacitor 5 becomes sufficiently low. That is, it is the time represented by T2 = C2 · R2.

By doing so, in Embodiment 4, the voltage of the electrolytic capacitor 5 can be completely discharged, so that the risk of electric shock to the maintenance worker during maintenance can be reduced.

That is, in the fourth embodiment, as described above, after a predetermined time elapses after the connection circuit is operated,
When the commercial power source presence / absence detection circuit 34 detects that the commercial power source 1 is not restored, the energizing transistor 9 of the regeneration resistor 8 is forcibly operated to forcibly discharge the electrolytic capacitor 5.

Example 5. The configuration of another embodiment of the present invention will be described. The configuration of another embodiment of the present invention is similar to that of the above-described first embodiment.

Next, the operation of the other embodiment will be described with reference to FIG. FIG. 9 is a flow chart showing the operation of another embodiment of the present invention.

After the operation of the above-described first embodiment is completed, that is, after the conditions are met and the rescue operation during a power failure is performed, the following operation is performed.

In step 90, the relay coil 22
It is determined that a is excited, and in step 91,
When the commercial power supply presence / absence detection circuit 34 detects that the commercial power supply 1 is restored, in step 93, the relay coil 22a is cut off.

Even if the commercial power source presence / absence detection circuit 34 detects that the commercial power source 1 is not restored in step 91, in step 92, the relay coil 22a is excited for a predetermined time (for example, in the rescue operation 1). If it is determined that about 2 minutes have passed, the relay coil 22a is cut off in step 92.

By doing so, the fifth embodiment can prevent the battery 12 from being unnecessarily discharged when the power failure continues.

That is, in the fifth embodiment, as described above, when the commercial power source presence / absence detection circuit 34 detects that the commercial power source 1 is restored after the connection circuit is operated, or Even when 1 is not restored, the battery connection circuit is forcibly shielded and the battery 12 is disconnected after a lapse of a predetermined time.

[0065]

[0066]

EFFECT OF THE INVENTION The elevator power failure operation device according to claim 1 of the present invention is configured as described above, that is, the power supply circuit is supplied with the DC power supply of the battery after a power failure occurs. Until this occurs, a single DC power source obtained by converting an AC power source that does not cause an abnormality in the operation of the elevator control circuit is supplied, and the elevator control circuit supplies a second power source during a power failure when a power failure is detected. The supply contact is closed, the DC power of the battery is supplied to the power supply circuit through the second battery connection circuit, and the first power failure time power supply contact is closed when the stop between floors is detected and the first battery Since the DC power of the battery is supplied to the inverter circuit through the connection circuit, it is not necessary to use an inverter or a contactor or relay that is excited during a power failure, which has been conventionally required for operation during a power failure. There is an effect that it is possible to dispense with circuit and a power supply for controlling. Further, since the elevator control circuit is not reset, there is no need to provide a dedicated circuit for giving the above-mentioned elevator control circuit that there is a power outage, and the time until starting rescue operation after a power outage can be shortened. It is possible to reduce the anxiety of passengers.

The elevator power failure operating device according to claim 2 of the present invention is configured as described above, that is, the power supply circuit is operated from the occurrence of the power failure until the DC power supply of the battery is supplied. During this period, a single DC power source obtained by converting from an AC power source in which no abnormality occurs in the operation of the elevator control circuit is supplied, and the elevator control circuit is closed at the second power failure power supply contact. In this case, when the inter-floor stop is detected and it is detected that the commercial power supply has not recovered from the power failure, the first power failure time power supply contact is closed and the DC power source of the battery is supplied through the first battery connection circuit. When the commercial power supply is supplied to the inverter circuit and it is detected that the commercial power supply has recovered from the power failure, the power supply contact is closed. An effect that it is possible to prevent the by unnecessary discharge of the battery by resulting in a rescue operation using. In addition, the speed of rescue operation using a battery is set lower than the speed of rescue operation using a commercial power source due to the capacity of the battery, so rescue time using a commercial power source should shorten the rescue time. There is an effect that can be.

Since the elevator power failure operation device according to claim 3 of the present invention is configured as described above, that is, from the occurrence of a power failure in the power supply circuit until the DC power supply of the battery is supplied. During this period, a single DC power source obtained by converting from an AC power source in which no abnormality occurs in the operation of the elevator control circuit is supplied, and the elevator control circuit is closed at the second power failure power supply contact. In this case, when the inter-level stop is detected and it is detected that the output voltage of the converter circuit has dropped to a predetermined value, the first power supply contact at the time of power failure is closed and the DC power source of the battery is supplied through the first battery connection circuit. In addition to the effects described above, the time until the operation command during elevator power failure is input to the inverter for some reason after the floor stop due to a power failure When the DC bus voltage drops below a predetermined value, the contactor is turned on in advance, so the current flowing into the electrolytic capacitor can be prevented, and it is not necessary to install a reactor for preventing inrush current. Has the effect.

Since the elevator power failure operating device according to claim 4 of the present invention is configured as described above, that is, from the occurrence of a power failure in the power supply circuit until the DC power supply of the battery is supplied. During this period, a single DC power source obtained by converting from an AC power source in which no abnormality occurs in the operation of the elevator control circuit is supplied, and the elevator control circuit closes the second power supply contact at the time of power failure. When it is detected that the commercial power supply has not been restored after a lapse of a predetermined time, the transistor is turned on and the electrolytic capacitor is forcibly discharged through the resistor. Therefore, in addition to the effects described above, the voltage of the electrolytic capacitor can be completely discharged. Therefore, there is an effect that it is possible to reduce a risk that a maintenance worker receives an electric shock during maintenance.

Since the elevator power failure operating device according to claim 5 of the present invention is configured as described above, that is, from the occurrence of a power failure in the power supply circuit until the DC power supply of the battery is supplied. During this period, a single DC power source obtained by converting from an AC power source in which no abnormality occurs in the operation of the elevator control circuit is supplied, and the elevator control circuit closes the second power supply contact at the time of power failure. When it is detected that the commercial power source is restored, or even when the commercial power source is not restored, the second power outage power supply contact is opened after a lapse of a predetermined time. Even if it continues, there is an effect that the battery is not discharged unnecessarily.

[Brief description of drawings]

FIG. 1 is a diagram showing an overall configuration of a first embodiment of the present invention.

FIG. 2 is a diagram showing a partial configuration of an elevator control circuit according to the first embodiment of the present invention.

FIG. 3 is a flowchart showing the operation of the first embodiment of the present invention.

FIG. 4 is a flowchart showing the operation of the second embodiment of the present invention.

FIG. 5 is a diagram showing an overall configuration of a third embodiment of the present invention.

FIG. 6 is a diagram showing a partial configuration of an elevator control circuit according to a third embodiment of the present invention.

FIG. 7 is a flowchart showing the operation of the third embodiment of the present invention.

FIG. 8 is a flowchart showing the operation of the fourth embodiment of the present invention.

FIG. 9 is a flowchart showing the operation of the fifth embodiment of the present invention.

FIG. 10 is a diagram showing an overall configuration of a conventional elevator power failure operation device.

[Explanation of symbols]

1 Commercial power supply 3 Normally open contact 4 converter 6 inverter 10A, 10B elevator control circuit 11 transformers 12 batteries 13 Normally open contact 20 rectifier 21 Smoothing capacitor 34 Commercial power source presence / absence detection circuit 35 DC bus voltage detection circuit

Claims (5)

(57) [Claims] 1. A converter circuit for converting commercial power to direct current.
The output of this converter circuit to a variable voltage and variable frequency
Number of AC voltage to convert the induction motor for elevator drive
Inverter circuit to control, direct current obtained by converting AC power supply
, Which operates with a single power source for controlling the inverter circuit.
Beta control circuit, converting the commercial power source to convert the DC
A power supply circuit for supplying one power supply to the elevator control circuit,
It is used for rescue operation during power outage and is almost the same as the above DC single power source.
A battery that outputs one voltage,
Connect to the inverter circuit via the power supply contact
A first battery connection circuit, and a second battery
In case of power failure, connect to the power circuit through the power supply contact
A second battery connection circuit is provided, and the power supply circuit has a power failure.
From generation to DC power supply of the battery
During this period, no abnormality occurs in the operation of the elevator control circuit.
It supplies a single DC power source obtained by converting
And when the elevator control circuit detects a power failure.
The second battery is closed by closing the power supply contact at the time of the second power failure.
DC power source of the battery through the reconnection circuit
When the circuit is supplied and an inter-floor stop is detected, the
1 the power supply contact at the time of power failure is closed to connect the first battery.
The DC power source of the battery is supplied to the inverter through a connecting circuit.
Elevator power failure characterized by supplying
Driving device. 2. A commercial power source is turned into direct current through a power supply contact.
Converter circuit to convert, output of this converter circuit
Convert to AC voltage with variable voltage and variable frequency
Inverter circuit that controls the induction motor for driving
The inverter operated by a single DC power source obtained by converting the source
Elevator control circuit for controlling the
Converting the single DC power source to the elevator control circuit
The power supply circuit to be supplied to the
A battery that outputs almost the same voltage as a single
Of the battery via the first power supply contact at the time of power failure.
First battery connection circuit to connect to the inverter circuit, line
To the battery via the second power supply contact at the time of power failure
A second battery connection circuit connected to the power supply circuit is provided,
The power circuit is a direct current of the battery after a power failure
Until the power is supplied, the elevator control circuit
The DC power obtained by converting the AC power supply that does not cause abnormal operation
Supply a single power source, as well as the elevator control circuit
When the power supply contact at the time of the second power failure is closed,
Is detected for a short time and the commercial power supply has not recovered from a power failure.
When it is detected that the
And closing the battery through the first battery connection circuit.
The territory DC power is supplied to the inverter circuit,
When it is detected that the power supply for use has recovered from a power failure
An elevator characterized in that the power supply contact is closed.
Power failure operation device. 3. A converter circuit for converting commercial power to direct current.
The output of this converter circuit to a variable voltage and variable frequency
Number of AC voltage to convert the induction motor for elevator drive
Inverter circuit to control, direct current obtained by converting AC power supply
, Which operates with a single power source for controlling the inverter circuit.
Beta control circuit, converting the commercial power source to convert the DC
A power supply circuit for supplying one power supply to the elevator control circuit,
It is used for rescue operation during power outage and is almost the same as the above DC single power source.
A battery that outputs one voltage,
Connect to the inverter circuit via the power supply contact
A first battery connection circuit, and a second battery
In case of power failure, connect to the power circuit through the power supply contact
A second battery connection circuit is provided, and the power supply circuit has a power failure.
From generation to DC power supply of the battery
During this period, no abnormality occurs in the operation of the elevator control circuit.
It supplies a single DC power source obtained by converting
And the elevator control circuit supplies power to the second power failure.
If the feed contact is closed, an inter-floor stop is detected and
Check that the output voltage of the converter circuit has dropped to a specified value.
When detected, the first power supply contact at the time of power failure is closed
Of the battery through the first battery connection circuit
DC power is supplied to the inverter circuit,
Elevator power failure operation device. 4. A converter circuit for converting commercial power to direct current.
, An electrolytic capacitor that smoothes the output of this converter circuit.
Variable voltage and variable frequency
Control the induction motor for elevator drive
Connected in parallel to the control inverter and the electrolytic capacitor
A resistor and a transformer that consume regenerative electric power from the induction motor.
Inverter circuit composed of
Operated with a single DC power source obtained by conversion
Elevator control circuit for controlling the road, converting the commercial power supply
The single DC power supply to the elevator control circuit.
The power circuit to be supplied, which is used for rescue operation in case of power failure
A battery that outputs almost the same voltage as a single power supply, this battery
The battery via the first power supply contact at the time of power failure.
A first battery connection circuit connected to the battery circuit, and
The battery is charged via the second power supply contact at the time of power failure.
A second battery connection circuit for connecting to a source circuit;
DC power supply of the battery after power failure
Operation of the elevator control circuit until
DC single obtained by converting AC power
Power supply, as well as the elevator control circuit
After a predetermined time has passed since the power supply contact was closed at the time of power failure in 2.
When it is detected that the commercial power is not restored,
The transistor is turned on and the resistor is used to
Elevator characterized by forcibly discharging the electrolytic capacitor
Data operation device for power failure. 5. A converter circuit for converting a commercial power source into a direct current.
The output of this converter circuit to a variable voltage and variable frequency
Number of AC voltage to convert the induction motor for elevator drive
Inverter circuit to control, direct current obtained by converting AC power supply
, Which operates with a single power source for controlling the inverter circuit.
Beta control circuit, converting the commercial power source to convert the DC
A power supply circuit for supplying one power supply to the elevator control circuit,
It is used for rescue operation during power outage and is almost the same as the above DC single power source.
A battery that outputs one voltage,
Connect to the inverter circuit via the power supply contact
A first battery connection circuit, and a second battery
In case of power failure, connect to the power circuit through the power supply contact
A second battery connection circuit is provided, and the power supply circuit has a power failure.
From generation to DC power supply of the battery
During this period, no abnormality occurs in the operation of the elevator control circuit.
It supplies a single DC power source obtained by converting
And the elevator control circuit supplies power to the second power failure.
The commercial power supply has been restored since the feed contact was closed.
Is detected, or the commercial power supply is not restored
Even after a predetermined time has elapsed, the second power supply contact at the time of power failure
Elevator operation equipment during blackouts characterized by opening
Place