JPH07315711A - Power supply device for elevator - Google Patents

Abstract

PURPOSE:To provide a power supply device for an elevator, which can prolong the lifetime of a battery for a backup lamp to be lighted up in case of power interruption. CONSTITUTION:The arrangement includes a battery 1 to supply power to an elevator backup lamp or emergency lamp to be lighted up in case of power interruption from the AC mains, a charging circuit to charge the battery 1 upon DC conversion of the AC power, a discharge circuit to discharge the battery 1, and a control circuit which starts the discharge by the discharging circuit when the charging time of the battery 1 by the charging circuit has elapsed a certain time and which resumes after discharging the charging by the charging circuit. The control circuit is equipped with an IC timer 11 which starts the discharge when the charging time of the battery 1 has elasped a certain time and a standby signal is sent off from an elevator control panel, a discharge duration relay 8 which stops the discharge by deenergizing on the basis of decrease in the discharge current associate with voltage drop of the battery 1 and starts charging, and a quick charging device 12 to charge the battery quickly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator power supply device for extending the life of a storage battery for a power failure lamp such as an elevator by repeating charging and discharging.

[0002]

2. Description of the Related Art FIG. 2 is a circuit diagram showing a power supply device for a power failure lamp or an emergency light currently used in an elevator. In FIG. 2, 1 is a nickel-cadmium storage battery (hereinafter,
2 is a transformer, 3 is a rectifier, 4 is a power failure detection relay for connecting the storage battery 1 to the lamp 6 and controlling the lighting of the lamp 6 by deactivating when a power failure of 100 V AC is detected, Reference numeral 5 is an inspection switch, and 6 is a lamp such as a power failure lamp or an emergency light used in an elevator.

In FIG. 2, in the storage battery 1, unless the lamp 6 is turned on by deactivating the power failure detection relay 4 at the time of power failure or opening of the inspection switch 5, 100 volt of AC is stepped down by the transformer 2 and DC of the rectifier 3 is set. It is always charged with the converted power.

[0004]

Therefore, in the above-mentioned power supply device, the storage battery 1 is always charged unless there is a power failure or an opening operation of the inspection switch 5, so that the storage battery 1 is overcharged. There was a problem that the deterioration was accelerated and the life was shortened.

The present invention has been made in order to solve the above-mentioned problems associated with the conventional example, and an object thereof is to obtain an elevator power supply device capable of extending the life of the storage battery for the power failure lamp of the elevator.

[0006]

According to a first aspect of the present invention, there is provided an elevator power supply device, a storage battery for supplying power to a power failure lamp or an emergency light that lights up during a power failure of an AC drive power source of the elevator, and the AC power supply. In an elevator power supply device including a charging circuit for converting a driving power source into a direct current to charge the storage battery, a discharge circuit for discharging the storage battery, and the discharge when the charging time of the storage battery by the charging circuit has passed a predetermined time And a control circuit for starting the discharge by the circuit and for starting the charge by the charging circuit again after the discharge.

The elevator power supply device according to a second aspect of the present invention is the power source device for an elevator according to the first aspect, wherein the control circuit sends a standby signal from the elevator control panel after the charging time of the storage battery by the charging circuit has passed a predetermined time. It is characterized by including an IC timer for controlling the start of discharge by the discharge circuit when the discharge is performed.

The elevator power supply device according to a third aspect of the present invention is the elevator power source device according to the first or second aspect, wherein the control circuit is deenergized based on a decrease in the discharge current due to the voltage drop of the storage battery to control the discharge stop. It is characterized by being provided with a discharge continuous relay for controlling start of charging.

Furthermore, an elevator power supply device according to a fourth aspect of the present invention is the elevator power supply device according to any one of the first to third aspects, wherein the control circuit includes a quick charging device for rapidly charging the storage battery. The charging is controlled by the charging circuit after the charging time set in the built-in timer has elapsed.

[0010]

In the power supply device for an elevator according to claim 1 of the present invention, the control circuit causes the discharge circuit to start discharging when the charging time of the storage battery by the charging circuit has passed a predetermined time, and the charging is performed again after the discharging. By starting the charging by the circuit, it is possible to periodically and automatically repeat the charge and discharge of the storage battery to extend the life of the storage battery.

According to a second aspect of the present invention, there is provided the elevator power supply device according to the first aspect, wherein the control circuit causes the storage circuit to charge the storage battery for a predetermined time.
Moreover, by providing the IC timer for controlling the start of discharge by the discharge circuit when the standby signal is sent from the elevator control panel, the discharge is surely performed after the storage battery is charged, and overcharge is prevented. .

Further, in an elevator power supply device according to a third aspect of the present invention, in the first or second aspect, the control circuit is deenergized to stop the discharge based on the decrease of the discharge current accompanying the voltage drop of the storage battery. The provision of the discharge sustaining relay that controls and starts the charging ensures that the storage battery is recharged after discharging and extends the life of the storage battery.

Further, in an elevator power supply device according to a fourth aspect of the present invention, in the control circuit according to any one of the first to third aspects, the control circuit includes a rapid charging device for rapidly charging the storage battery, and the rapid charging device is also provided. After the charging time set in the built-in timer has elapsed, the charging circuit controls the charging so that charging after discharging the storage battery is completed rapidly, and then the storage battery is reset to the initial state. To be able to do.

[0014]

【Example】

Example 1. Hereinafter, embodiments will be described based on illustrated embodiments. 1 is a circuit diagram showing an elevator power supply device according to a first embodiment. 1, the same reference numerals as those in the conventional example shown in FIG. 2 indicate the same parts, 1 is a nickel-cadmium storage battery (hereinafter, simply referred to as a storage battery), 2 is a transformer, 3 is a rectifier, and 4 is an AC 100V power failure detection. A power failure detection relay for controlling the lighting of the lamp 6 by connecting the storage battery 1 to the lamp 6 by deactivating at times, 5 is an inspection switch, and 6 is a lamp such as a power failure lamp or an emergency light used in an elevator. is there.

Further, as new symbols, 7 is a discharge operation transistor that operates at the time of discharge, 8 is a discharge sustaining relay for monitoring the end time of discharge, 8A and 8B are the first contact and the second contact of the discharge sustaining relay 8. At the contact point, the discharge sustaining relay 8 is deenergized based on the decrease in the discharge current due to the voltage drop of the storage battery 1 to stop the discharge and control the start of charging. Reference numeral 9 is a discharge start relay that is energized at the start of discharge of the storage battery, 10 is a discharge start transistor that operates the discharge start relay 9, 11 is a charge continuation period, and after waiting a certain period of time, waiting from an elevator control panel (not shown) An IC timer for controlling the start of discharging when the signal 11A is sent out, and a rapid charging device 12 for charging in a short time after the completion of discharging, which has a built-in timer for controlling the charging time.

Further, 13 is a discharge resistor, 14 is a holding resistor of the continuous discharge relay 8, 15 is a diode for blocking a current flowing into the quick charging device at the time of discharging, and 16 is a charging resistor for charging the storage battery 1 with a constant current. Reference numeral 17 denotes a protection resistor for using a discharge sustaining relay 8 having a rated voltage lower than the voltage of the storage battery 1, and 18 denotes a bias resistor for operating the discharge operation transistor 7, and these configurations shown in FIG. Storage battery 1 for supplying power to a blackout lamp or an emergency light that lights up when the AC drive power of the elevator is cut off
A charging circuit for converting the alternating current drive power source into a direct current to charge the storage battery 1, a discharging circuit for discharging the storage battery 1, and the discharging circuit when the charging circuit charges the storage battery 1 for a predetermined time. And a control circuit for starting the discharge by the charging circuit again after the discharge.

Next, the operation of the above configuration will be described. In FIG. 1, a contact 8 of a discharge continuous relay 8 described later.
The state in which B is connected to the OFF side and the DC conversion current from the rectifier 3 is input, that is, the state in which the storage battery 1 is charged has passed for a certain period of time, and the state in which the elevator is not used and stands by continues. Check that there is no elevator user (for example, no landing call or car call)
When the standby signal 11A from the elevator control panel (not shown) is input to the input line of the IC timer 11, the IC timer 11
Is activated and the discharge starting transistor 10 becomes conductive.

A rectifier 3 is connected to the discharge starting transistor 10.
When the electric current from flows through, the discharge starting relay 9 is energized, its contact 9A is connected to the ON side, and the protective resistor 17
At the same time as the discharge sustaining relay 8 is energized via the, the discharge operation transistor 7 becomes conductive and the electric power stored in the storage battery 1 is consumed while being discharged by the discharge resistor 13. Further, when the discharge sustaining relay 8 is energized, the contact 8A is connected to the ON side, the discharge sustaining relay 8 continues to be energized by the holding resistor 14, and the discharge operation transistor 7 remains conductive. Then, it continues until the electric power stored in the storage battery 1 is discharged by 80% or more, for example.

When the discharge sustaining relay 8 is energized, the contact 8A is connected to the ON side and at the same time the contact 8B is also switched to the ON side, so that the IC timer 11 and the quick charging device 12 are disconnected from the charging rectifier 3. The discharge start transistor 10 is released, the discharge start transistor 10 cannot be conducted, the discharge start relay 9 is deenergized, and the contact 9A is opened to the OFF side. Therefore, the discharge continuous relay 8 passes through the holding resistor 14. The energized state continues due to the flowing current.

When the storage battery 1 is discharged, the voltage of the storage battery 1 drops and the current decreases, so that the continuous discharge relay 8 is deenergized and the contact 8A is opened.
Does not conduct, the storage battery 1 stops discharging, the contact 8B is turned off, and the NiCd storage battery 1 is charged through the quick charging device 12. Here, the quick charging device 12 sets a current so that the NiCd storage battery 1 does not have an excessive charging current, and that charging is completed in 2 to 4 hours, and a charging time is set by a built-in timer. When the charging time elapses and the charging is completed, the rapid charging device 12 shuts off the charging of the storage battery 1 by the built-in timer, charges the battery 1 with a small current through the charging resistor 16, and resets the initial state.

Therefore, according to the above-described embodiment, the discharge is started when the charging time of the storage battery 1 elapses a predetermined time, and the charging is started again after the discharge, so that the charge and discharge of the storage battery 1 is periodically performed. And, it can be automatically repeated to extend the life of the storage battery 1.

[0022]

As described above, according to the elevator power supply device according to the first aspect of the present invention, the control circuit causes the discharge circuit to start discharging when the charging time of the storage battery by the charging circuit has passed a predetermined time. At the same time, after the discharge, the charging by the charging circuit is started again.
There is an effect that the charge and discharge of the storage battery can be periodically and automatically repeated to extend the life of the storage battery.

According to a second aspect of the present invention, there is provided the elevator power supply device according to the first aspect, wherein the control circuit causes the storage circuit to charge the storage battery for a predetermined period of time, and the elevator control panel outputs a standby signal. By providing an IC timer for controlling the start of discharge by the discharge circuit when is sent, there is an effect that discharge can be reliably performed after charging the storage battery and overcharging can be prevented.

According to a third aspect of the present invention, there is provided the elevator power supply device according to the first or second aspect, in which the control circuit is deenergized to discharge on the basis of a decrease in discharge current due to a voltage drop of the storage battery. The provision of the discharge sustaining relay that controls the stop and the start of charging has the effect of reliably recharging the storage battery after discharging and extending the life of the storage battery.

Further, according to the elevator power supply device of claim 4, in any one of claims 1 to 3,
By providing the control circuit with a quick charging device for rapidly charging the storage battery, and controlling the charging circuit to perform charging after the charging time set in the timer built in the rapid charging device has elapsed. There is an effect that the charge of the storage battery after discharging can be rapidly completed, and then the storage battery can be reset to the initial state.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing a power supply device for an elevator according to an embodiment of the present invention.

FIG. 2 is a circuit diagram showing an elevator power supply device according to a conventional example.

[Explanation of symbols]

1 nickel-cadmium storage battery, 3 rectifier, 4 power failure detection relay, 7 discharge operation transistor, 8 discharge continuous relay, 9 discharge start relay, 10 discharge start transistor, 11 IC timer, 12 quick charging device, 13
Discharge resistor, 14 holding resistor, 15 blocking the rapid charging current, 16 charging resistor for constant current charging, 17 protection resistor for discharge sustaining relay 8, 18 bias resistor for discharging operation transistor 7.

Claims (4)

[Claims] 1. A storage battery for supplying power to a power failure lamp or an emergency light that lights up when a power failure occurs in an AC drive power supply for an elevator, and a charging circuit for converting the AC drive power supply into a DC power to charge the storage battery. In an elevator power supply device, a discharge circuit that discharges the storage battery, and the discharge circuit starts discharging when the charging time of the storage battery by the charging circuit has passed a predetermined time, and after the discharge, charging by the charging circuit is started again. A power supply device for an elevator, comprising: 2. An IC timer for controlling the start of discharge by the discharge circuit when the charge time of the storage battery by the charge circuit has passed a predetermined time and a standby signal is sent from the elevator control panel. The elevator power supply device according to claim 1, further comprising: 3. The control circuit includes a continuous discharge relay that deenergizes based on a decrease in discharge current due to a voltage drop of the storage battery to control discharge to be stopped and start to charge. The power supply device for an elevator according to claim 1 or 2. 4. The control circuit includes a quick charging device for rapidly charging the storage battery, and charging is performed by the charging circuit after a charging time set in a timer incorporated in the rapid charging device has elapsed. The power supply device for an elevator according to any one of claims 1 to 3, wherein: