CN116995795A - Elevator emergency power supply device and emergency power supply method - Google Patents
Elevator emergency power supply device and emergency power supply method Download PDFInfo
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- CN116995795A CN116995795A CN202310969518.5A CN202310969518A CN116995795A CN 116995795 A CN116995795 A CN 116995795A CN 202310969518 A CN202310969518 A CN 202310969518A CN 116995795 A CN116995795 A CN 116995795A
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000002159 abnormal effect Effects 0.000 claims abstract description 34
- 238000001514 detection method Methods 0.000 claims description 53
- 230000005059 dormancy Effects 0.000 claims description 20
- 230000005856 abnormality Effects 0.000 claims description 14
- 230000007958 sleep Effects 0.000 claims description 9
- 238000005259 measurement Methods 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract 2
- 238000012423 maintenance Methods 0.000 abstract 2
- 230000007547 defect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 9
- 238000004804 winding Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 239000003381 stabilizer Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/062—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for AC powered loads
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- Elevator Control (AREA)
Abstract
The invention discloses an elevator emergency power supply device and an emergency power supply method, and aims to solve the problems of complex equipment, high cost and difficult installation and maintenance of the traditional elevator emergency power supply device. The elevator emergency power supply circuit comprises an elevator emergency power supply circuit, a storage battery, a control cabinet power supply, a frequency converter and an elevator main control board, wherein the storage battery, the control cabinet power supply, the frequency converter and the elevator main control board are respectively connected with the elevator emergency power supply circuit; the elevator emergency power supply circuit is connected with the mains supply circuit; the elevator emergency power supply circuit is used for detecting an abnormal state of the mains supply, and when the mains supply is abnormal, the elevator emergency power supply circuit switches the storage battery to supply power, and the storage battery supplies power for the control cabinet power supply and the frequency converter; the elevator emergency power supply circuit boosts a power supply of the storage battery and supplies power to the control cabinet power supply and the frequency converter; the control cabinet power supply supports both ac and dc inputs. The invention has the advantages of simplifying the design of the emergency power supply device and reducing the cost. Compared with the prior art, the invention gets rid of the technical defects of complex equipment, high cost and difficult installation and maintenance.
Description
Technical Field
The invention belongs to the technical field of elevator equipment, and particularly relates to an elevator emergency power supply device and an emergency power supply method.
Background
Elevators are indispensable vertical vehicles in buildings, and their normal operation is critical for the normal use of the building. However, in the existing elevator system, when the main power supply fails or fails, the elevator stops running, and passengers may be trapped in the elevator, which affects the safety and normal life of the passengers.
To solve this problem, elevator systems are often equipped with emergency power supply devices. When the main power supply fails, the emergency power supply device can be started immediately to supply power to the elevator, so that the elevator can continue to run or at least can safely send passengers to the nearest floor. The traditional elevator emergency power supply device in the current market is mainly a three-phase emergency power supply device, and outputs three-phase power supply during emergency rescue.
For this reason, a new emergency power supply device for an elevator needs to be provided to solve the problem of the conventional three-phase emergency power supply device.
Disclosure of Invention
The invention aims to solve the technical problems and provides an elevator emergency power supply device and an emergency power supply method.
In order to solve the problems, the invention is realized according to the following technical scheme:
according to one aspect of the invention, an elevator emergency power supply device is provided, which is characterized by comprising an elevator emergency power supply circuit, a storage battery, a control cabinet power supply, a frequency converter and an elevator main control, wherein the storage battery, the control cabinet power supply, the frequency converter and the elevator main control are respectively connected with the elevator emergency power supply circuit; the elevator emergency power supply circuit is connected with a mains supply circuit; the elevator emergency power supply circuit is used for detecting an abnormal state of the mains supply, and when the mains supply is abnormal, the elevator emergency power supply circuit switches the storage battery to supply power, and the storage battery supplies power for the control cabinet power supply and the frequency converter; the elevator emergency power supply circuit boosts a power supply of the storage battery to supply power for the control cabinet power supply and the frequency converter; the control cabinet power supply supports alternating current and direct current input.
In one embodiment, the elevator emergency power supply circuit comprises an AC220 input detection module, a charging module, a direct current 310 boosting module, a bus voltage detection module, a single-phase switching module, a bus switching module, a dormancy module, an auxiliary source module and a main control module for driving each module of the elevator emergency power supply circuit;
the AC220 input detection module is respectively connected with the mains supply, the charging module and the main control module, and the AC220 input detection module is used for detecting and determining the input state of the mains supply;
the charging module is connected with the storage battery and is used for charging the storage battery;
the direct current 310 boosting module is respectively connected with the storage battery, the single-phase switching module and the bus switching module, and the direct current 310 boosting module is used for boosting direct current output by the storage battery to direct current 310V to supply power to the power supply of the control cabinet and the bus of the frequency converter;
the bus voltage detection module is connected with the frequency converter bus and is used for positive and negative detection of the frequency converter bus voltage and abnormal judgment of the mains supply;
the single-phase switching module is respectively connected with the mains supply and the control cabinet power supply, and is used for switching the elevator emergency power supply device to supply power to the control cabinet power supply when the mains supply is abnormal;
the bus switching module is connected with the frequency converter bus and is used for switching the elevator emergency power supply device to supply power to the frequency converter bus when the commercial power is abnormal;
the dormancy module is respectively connected with the storage battery and the direct current 310 boosting module and is used for disconnecting the storage battery from the elevator emergency power supply device;
the auxiliary source module is respectively connected with the AC220 input detection module, the charging module, the direct current 310 boosting module, the bus voltage detection module, the single-phase switching module, the bus switching module and the dormancy module, and is used for supplying power to each functional module;
according to the elevator emergency power supply device, when the commercial power is normal, the single-phase switching module outputs 220V alternating current commercial power, and the 220V alternating current commercial power is directly output from the interfaces J20-1 and J20-3 to supply power to the power supply of the control cabinet; the charging module charges the storage battery; the bus switching module, the sleep module, and the direct current 310 boost module are silent.
When the commercial power is abnormal, the elevator emergency power supply device is characterized in that the direct-current 310 boosting module boosts the voltage of the storage battery to direct-current 310V in a push-pull manner, then the single-phase switching module and the bus switching module act, the direct-current 310V voltage is output to supply power to the power supply of the control cabinet and the bus of the frequency converter, and finally the elevator master control is informed of emergency rescue through RS485 communication.
In one of the embodiments, an emergency power supply method of an elevator emergency power supply device is provided, characterized in that the elevator emergency power supply device is configured to perform the emergency power supply method, the emergency power supply method comprising:
detecting abnormal conditions of the mains supply;
when the commercial power is determined to be normal, the elevator emergency power supply device, the control cabinet power supply and the frequency converter supply power to be supplied by the commercial power, and the storage battery is charged through a charging module of the elevator emergency power supply device;
the bus voltage detection module is connected with a frequency converter bus for voltage measurement;
the storage battery is connected with the direct current 310 boosting module and the auxiliary element module;
the auxiliary source module and the main control module work normally;
when the commercial power is determined to be abnormal, the single-phase switching module switches a control cabinet power supply to be connected with the direct current 310 boosting module, so that an output interface of the direct current 310 boosting module is connected to the control cabinet power supply;
the bus switching module switches the connection of a frequency converter bus and the direct current 310 boosting module, so that an output interface of the direct current 310 boosting module is connected to the frequency converter bus;
the voltage of the storage battery is boosted into direct-current 310V voltage through the direct-current 310 boosting module in a push-pull way so as to supply power for the control cabinet power supply and the frequency converter bus;
the main control module sends a starting rescue signal to the elevator main control;
the elevator main control is used for outputting a rescue stopping signal;
the elevator emergency power supply device stops power supply output after the main control module receives a rescue stopping signal;
resetting the single-phase switching module and resetting the bus switching module;
the main control module starts dormancy timing when the AC220 input detection module detects that no commercial power is input;
when the dormancy timing reaches an expected value, the elevator emergency power supply device enters a dormancy state.
In one embodiment, the frequency converter is used for detecting single-phase abnormality of the mains supply;
the elevator emergency power supply device only takes T, N wires at a three-phase power wire inlet end, and the AC220 input detection module detects the mains supply input state of T, N wires; the bus voltage detection module in the elevator emergency power supply device is used for detecting the abnormality of the frequency converter and the elevator main control voltage; and when the AC220 input detection module, the bus voltage detection module and the single-phase abnormality detection of the frequency converter do not detect abnormality, the commercial power is considered to be normal.
In one embodiment, the commercial power is converted into a direct-current voltage 310V through a rectifier bridge in the charging module, and then is converted into a flyback topology to be 41V to charge the storage battery;
the charging module output voltage positive end is equipped with fuse and diode with the battery positive end, the input of diode is connected with the charging module, the output of diode is connected with the fuse, the input of fuse with the diode is connected the output of fuse is connected with the battery, the fuse is used for preventing when charging module output short circuit and overload damages the battery, when the diode prevents the commercial power disconnection, battery voltage flows backward and gets into the charging module.
In one embodiment, a diode is arranged between the single-phase switching module and the control cabinet power supply and used for preventing the control cabinet power supply voltage from flowing backwards; and a diode is arranged between the bus switching module and the frequency converter bus and used for preventing the voltage of the frequency converter bus from flowing backwards.
In one embodiment, the control mode of the dc310 boost module adopts a digital control mode, and the main control module controls the output voltage through PWM.
In one embodiment, the AC220 input detection module disconnects the battery from powering the elevator emergency power supply when no input of the mains is detected within 30 minutes;
the AC220 input detection module detects a normal input of the mains supply and the elevator emergency power supply is activated.
In one embodiment, the elevator emergency power supply device further comprises a key display panel and a throw-in switch; the key display board is connected with the main control module and comprises four keys and a four-bit nixie tube for displaying and setting parameter information; the input switch is a ship-shaped switch and is used for outputting the enabling of the elevator emergency power supply device.
Compared with the prior art, the invention has the beneficial effects that: the elevator emergency power supply device comprises an elevator emergency power supply circuit, a storage battery, a control cabinet power supply, a frequency converter and an elevator main control, wherein the storage battery, the control cabinet power supply, the frequency converter and the elevator main control are respectively connected with the elevator emergency power supply circuit; the elevator emergency power supply circuit is connected with a mains supply circuit; the elevator emergency power supply circuit is used for detecting an abnormal state of the mains supply, and when the mains supply is abnormal, the elevator emergency power supply circuit switches the storage battery to supply power, and the storage battery supplies power for the control cabinet power supply and the frequency converter; the elevator emergency power supply circuit boosts a power supply of the storage battery to supply power for the control cabinet power supply and the frequency converter; the control cabinet power supply supports alternating current and direct current input. Firstly, the design can fully utilize the electric energy of the storage battery, simplify the design of the emergency power supply device and reduce the cost. Compared with the traditional three-phase emergency power supply device, the invention is simpler. The emergency power supply circuit detects the abnormal state of the mains supply and switches to the storage battery for supplying power when the mains supply fails, so that the safety of the elevator under the condition of power failure or power failure is obviously improved.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the invention or to delineate the scope of the invention. Other features of the present invention will become apparent from the description that follows.
Drawings
The invention is described in further detail below with reference to the attached drawing figures, wherein:
fig. 1 is a configuration structural view of an emergency power supply device for an elevator according to the present invention;
fig. 2 is a detailed configuration diagram of an emergency power supply device for an elevator according to the present invention;
fig. 3 is a logic block diagram of a mains anomaly detection method of an emergency power supply of an elevator emergency power supply device of the present invention;
fig. 4 is a system logic block diagram of an emergency power supply method of an elevator emergency power supply device of the present invention;
fig. 5 is a sleep logic block diagram of an emergency power supply method of an elevator emergency power supply device of the present invention;
fig. 6 is a schematic diagram of a charging module of an elevator emergency power supply device of the present invention;
fig. 7 is a schematic diagram of a sleep module of an elevator emergency power supply device of the present invention;
fig. 8 is a schematic view of an auxiliary source module of an elevator emergency power supply of the present invention;
fig. 9 is a schematic diagram of a single-phase switching and bus switching module of an elevator emergency power supply device of the present invention;
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present invention only, and are not intended to limit the present invention.
In the prior art, the traditional elevator emergency power supply device is mainly a three-phase emergency power supply device, three-phase power supply is output during emergency rescue, and the three-phase emergency power supply device is caused to have the problems of complex structure, large size and high cost by the power supply output mode.
Therefore, the technical scheme of the invention aims to provide the elevator emergency power supply device and the emergency power supply method, which adopt a three-phase power T, N line single-phase input mode to output one path of direct current 310V to supply power to an elevator control cabinet power supply and a frequency converter bus, cancel the inverter of the traditional elevator emergency power supply device and adopt a direct current output mode to supply power to an elevator, thereby greatly reducing the cost and the volume. The relay is used for automatically controlling the inlet wire end of the storage battery to replace a traditional breaker, so that the risk of false opening and false closing is prevented while the cost is reduced.
The elevator emergency power supply device only takes T, N lines of three-phase power, the single-phase abnormal condition of the commercial power is detected by the frequency converter and then transmitted to the elevator emergency power supply device through the RS485 bus by the elevator main control transfer, and other abnormal conditions of the commercial power are detected by the elevator emergency power supply circuit. When the commercial power is abnormal, the elevator emergency power supply device boosts the voltage of the storage battery to 310V in a push-pull way to supply power to the control cabinet power supply and the frequency converter bus, if no commercial power AC220 is input after rescue is finished, the elevator emergency power supply device thoroughly cuts off the storage battery power supply to sleep after 30 minutes, and the elevator emergency power supply device can be activated again after the commercial power AC220 is input to resume.
As shown in fig. 2, the elevator emergency power supply circuit comprises an AC220 input detection module, a charging module, a direct current 310 boosting module, a bus voltage detection module, a single-phase switching module, a bus switching module, a sleep module, an auxiliary source module and a main control module for driving each module of the elevator emergency power supply circuit;
the AC220 input detection module is respectively connected with the mains supply, the charging module and the main control module, and the AC220 input detection module is used for detecting and determining the input state of the mains supply;
the charging module is connected with the storage battery and is used for charging the storage battery;
the direct current 310 boosting module is respectively connected with the storage battery, the single-phase switching module and the bus switching module, and the direct current 310 boosting module is used for boosting direct current output by the storage battery to direct current 310V to supply power to the power supply of the control cabinet and the bus of the frequency converter;
the bus voltage detection module is connected with the frequency converter bus and is used for positive and negative detection of the frequency converter bus voltage and abnormal judgment of the mains supply;
the single-phase switching module is respectively connected with the mains supply and the control cabinet power supply, and is used for switching the elevator emergency power supply device to supply power to the control cabinet power supply when the mains supply is abnormal;
the bus switching module is connected with the frequency converter bus and is used for switching the elevator emergency power supply device to supply power to the frequency converter bus when the commercial power is abnormal;
the dormancy module is respectively connected with the storage battery and the direct current 310 boosting module and is used for disconnecting the storage battery from the elevator emergency power supply device;
the auxiliary source module is respectively connected with the AC220 input detection module, the charging module, the direct current 310 boosting module, the bus voltage detection module, the single-phase switching module, the bus switching module and the dormancy module, and is used for supplying power to each functional module;
firstly, only T, N wires at the three-phase power inlet end enter an elevator emergency power supply device, and then a storage battery is charged, and if the commercial power is normal, 220V alternating current on T, N wires is directly output from interfaces J20-1 and J20-3 of the elevator emergency power supply device to supply power to a control cabinet power supply.
The elevator emergency power supply device is externally connected with a key display board through an interface J13, and the key display board is provided with four keys and four-bit nixie tubes and is used for displaying information such as voltage and current and setting parameters such as a voltage ring proportion value.
The RS485 communication interface J15 is externally connected with an elevator main control and is used for uploading information such as battery voltage, charging state and the like to the elevator main control at ordinary times. When the commercial power is abnormal, the elevator emergency power supply device outputs power supply, a starting rescue signal is sent to the elevator main control through the RS485 interface, then the elevator operates to the nearest flat-bed door to open the door, after rescue is finished, the elevator main control sends a stopping rescue signal through the RS485 interface, and the elevator emergency power supply device stops outputting power supply after receiving the stopping rescue signal. Meanwhile, a single-phase abnormality sign of the mains supply is issued by the elevator master control through an RS485 interface.
When the mains supply is normal, the single-phase switching module outputs 220V alternating-current mains supply, and the 220V alternating-current mains supply is directly output from the interfaces J20-1 and J20-3 to supply power to the power supply of the control cabinet; the relay contact of the bus voltage switching module is disconnected, and the direct current 310 boosting module is isolated from the frequency converter bus; and the bus voltage detection module is connected into a bus of the frequency converter to carry out voltage measurement. When the commercial power is abnormal, the elevator emergency power supply device is characterized in that the direct current 310 boosting module boosts the voltage of the storage battery to direct current 310V in a push-pull manner, then the single-phase switching module and the bus switching module act, and the direct current 310V voltage is output to supply power to the power supply of the control cabinet and the bus of the frequency converter.
The input switch interface J3 is externally connected with a ship-shaped switch, when the switch is turned on, the output of the elevator emergency power supply device can be normally started, and when the switch is turned off, the output power supply of the elevator emergency power supply device is stopped immediately.
Fig. 3 is a logical block diagram of a mains anomaly detection for an emergency power supply method of an elevator emergency power supply according to the invention, which detection method can be performed by an elevator emergency power supply, which can be implemented in hardware and/or software, which can be deployed in an electronic device. As shown in fig. 3, the method includes:
step 301, detecting the voltage of a busbar of the frequency converter.
When the three-phase input lacks two phases/three phases, the power cannot be supplied to the frequency converter and the elevator main control, and the single-phase abnormality detection of the frequency converter cannot work normally; but the voltage abnormality can be detected by the elevator emergency power supply bus voltage module.
Step 302, detecting an input state of the input detection module of the AC 220.
The elevator emergency power supply device only takes T, N wires at a three-phase power wire inlet end, and the AC220 input detection module detects the mains supply input state of T, N wires.
And 303, detecting an elevator main control abnormality mark.
When the three-phase input lacks a single phase, the frequency converter can detect the single phase abnormality of the commercial power, and then the elevator master control transit transmits a single phase abnormality mark of the commercial power through the RS485 bus.
The utility is considered normal only if no anomaly is detected for AC220 input detection, bus voltage detection, inverter single phase anomaly detection. If the steps are abnormal, the elevator emergency power supply device starts emergency power supply output.
Fig. 4 is a system logic block diagram of an emergency power supply method of an elevator emergency power supply device of the present invention, which may be implemented by an elevator emergency power supply device, which may be implemented in hardware and/or software, which may be configured in an electronic apparatus. As shown in fig. 4, the method includes:
step 401, determining that the commercial power is abnormal;
step 402, the single-phase switching module performs a switching action, so that an output interface of the direct current 310 boosting module is connected to the power supply of the control cabinet;
the bus switching module performs switching action, so that an output interface of the direct current 310 boosting module is connected to a bus of the frequency converter;
step 403, the direct-current low voltage output by the storage battery is boosted into direct-current 310V voltage through the direct-current 310 boosting module in a push-pull way, and the direct-current 310V voltage supplies power for the control cabinet power supply and the frequency converter bus;
step 404, the main control module sends a starting rescue signal to the elevator main control;
step 405, the elevator master control controls the elevator to finish rescue and sends a rescue stopping signal; the elevator emergency power supply device stops emergency power supply output after the main control module receives a rescue stopping signal; resetting the single-phase switching module and resetting the bus switching module; the main control module starts dormancy timing when the AC220 input detection module detects that no commercial power is input; when the dormancy timing reaches an expected value, the elevator emergency power supply device enters a dormancy state;
the elevator emergency power supply device uploads a starting rescue signal to the elevator main control through the RS485 interface, after the elevator starts to move to the nearest flat layer position in the light load direction, an elevator door is opened to enable passengers to leave a car, then the elevator is closed again, rescue is completed at the moment, the elevator main control issues a stopping rescue signal through the RS485 interface, the elevator emergency power supply device stops emergency power supply output, meanwhile, the single-phase switching module and the bus switching module are reset, the input of the direct current 310 boosting module is disconnected with a control cabinet power supply and a frequency converter bus, and the input of the commercial power AC220 is connected to the control cabinet power supply.
As shown in fig. 5, the elevator emergency power supply device enters a sleep timer when no mains AC220 is input and is not in a rescue state. Generally, the emergency power supply device is divided into two cases, one is in a place such as a warehouse where the emergency power supply device does not need to work, and the other is in a case that the emergency power supply device waits for the input of the commercial power AC220 to restore to normal after normal rescue is completed. In the two cases, dormancy timing is started, if no commercial power AC220 is detected within 30 minutes, the direct dormancy module acts to disconnect the power supply of the storage battery to the elevator emergency power supply device, so that the electric energy of the storage battery is saved, and the storage battery is prevented from being damaged by over-discharge of the electric energy. The utility AC220 input will again activate the elevator emergency power supply after restoration.
As shown in fig. 6, the charging circuit firstly obtains the input 220V ac mains supply from the J1 interface, converts the ac mains supply into 310 dc voltage through the B1 rectifier bridge and the C3 filter capacitor, and then builds a flyback topology circuit with the power management chip U1 as a core to convert the 310 dc voltage into 41V dc voltage.
One end of the resistor R2 is connected with the positive end of 310 direct current, the other end of the resistor R2 is connected to the 5 pin of the U1 chip, and when the resistor R2 is electrified for the first time, 310 direct current is reduced in voltage, and then a starting voltage is supplied to the U1 chip. After the U1 chip starts to work, the auxiliary windings corresponding to the pin 3 and the pin 4 of the T1 transformer step down to supply power to the U1 chip through the D4 and the R5.
The pin 6 of the U1 chip is connected with the grid electrode of the switching tube Q3 to control the on-off of the switching tube, and energy corresponding to primary windings corresponding to the pin 1 and the pin 2 of the T1 transformer is transferred to secondary windings corresponding to the pin 5 and the pin 6 of the T1 transformer.
A voltage feedback circuit is built by the voltage stabilizing source D7, the optocoupler U2, the resistors R7, R8, R9, R12 and R14, the capacitors C5 and C6, and an error between the output voltage and the target voltage 41V is fed back to the 2 pin of the U1 chip. Then the U1 chip adjusts the output voltage by changing the PWM duty ratio output by the 6 pins, so that the output voltage is stabilized at 41V.
The output voltage of the charging module is connected to the storage battery interfaces J9 and J6 to charge the storage battery, a fuse F1 and a diode D2 are arranged between the positive end of the output voltage of the charging module and the positive end of the storage battery to protect the storage battery, the fuse F1 is used for preventing the storage battery from being damaged when the output of the charging module is short-circuited and overloaded, and the diode D2 is used for preventing the voltage of the storage battery from flowing backwards into the charging module when the commercial power is disconnected.
As shown in fig. 7, the contact of pin 1 of the sleep module K1 relay is connected to the positive end of the storage battery, and the contact of pin 2 is connected to the positive ends of the input ends of the boost module and the auxiliary source module of the direct current 310. When the mains supply is normal, the charging module outputs 41V, at the moment, the triodes Q1, Q2 and Q5 are conducted, the contact of the relay K1 is closed, the storage battery is connected to the direct current 310 boosting module and the auxiliary source module, then the auxiliary source module and the main control module work normally, at the moment, the voltage of the 3 feet of the K1 relay is higher than 12V, the diode D5 is cut off, the auxiliary source 12V is isolated from the K1 relay, the main control module outputs low level to the 2 feet of the Q4 triode, but the Q4 triode cannot be conducted because the voltage of the 1 feet of the Q4 triode is higher than 3 feet 5V. When the mains supply is disconnected, the charging module does not have 41V voltage output, at the moment, the triodes Q1 and Q2 are cut off, the foot of the Q4 triode 1 does not have voltage, so the triodes Q4 and Q5 are conducted, the diode D5 is conducted, the auxiliary source 12V supplies power to the K1 relay, the contact of the relay K1 is still kept closed, and the storage battery is still connected to the direct current 310 boosting module and the auxiliary source module. During dormancy, the main control module outputs high level to the triode Q4, then the triodes Q4 and Q5 are cut off, the contact of the relay K1 is disconnected, the storage battery is connected with the direct current 310 boosting module and the auxiliary source module, and the elevator emergency power supply device cuts off the power supply of the storage battery and enters dormancy.
As shown in fig. 8, the auxiliary source module converts the voltage of the storage battery into 12V by using a flyback topology circuit like the charging module, then uses a linear voltage stabilizer to stabilize the 12V voltage into 5V, and uses the linear voltage stabilizer to stabilize the 5V voltage to obtain 3.3V.
As shown in FIG. 9, the single-phase switching module is controlled by a K2 relay, when the commercial power is normal, the main control module outputs a low level to the pin 2 of the Q8 triode, at the moment, the Q8 triode is cut off, the normally closed contact of the K2 relay coil is closed, the normally open contact is opened, TI is connected with T-OUT, NI is connected with N-OUT, and the commercial power AC220 input supplies power to the power supply of the control cabinet through interfaces J20-1 and J20-3. When the commercial power is abnormal, the main control module outputs a high level to the pin 2 of the Q8 triode, at the moment, the Q8 triode is conducted, the normally closed contact of the coil of the K2 relay is opened, the normally open contact of the coil of the K2 relay is closed, the output positive electrode DC310+ of the direct current 310 boosting module is connected with the T-OUT after passing through the diode, the output negative electrode DC 310-of the direct current 310 boosting module is connected with the N-OUT, and the direct current output of the elevator emergency power supply device 310 supplies power to a power supply of the control cabinet through the interfaces J20-1 and J20-3.
The bus switching module is controlled by adopting a K3 relay. When the mains supply is normal, the main control module outputs low level to the pin 2 of the Q7 triode, at the moment, the Q7 triode is cut off, the coil of the K3 relay is not electrified and the contact is disconnected, and the direct current 310 boosting module is connected and disconnected with the variable-frequency bus; when the commercial power is abnormal, the main control module outputs a high level to the pin 2 of the Q7 triode, at the moment, the Q7 triode is conducted, the coil of the K3 relay is electrified and the contact is closed, the DC310 boosting module outputs a positive pole DC310+ which is connected with the VFD+ after passing through the diode, the DC310 boosting module outputs a negative pole DC 310-which is connected with the VFD-, and the elevator emergency power supply device 310 supplies power to the frequency converter through the interfaces J20-5 and J20-7.
It should be appreciated that various forms of the flows shown above may be used to reorder, add, or delete steps. For example, the steps described in the present invention may be performed in parallel, sequentially, or in a different order, so long as the desired results of the technical solution of the present invention are achieved, and the present invention is not limited herein.
The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives are possible, depending on design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (9)
1. An emergency power supply device for an elevator is characterized in that:
the elevator emergency power supply device comprises an elevator emergency power supply circuit, a storage battery, a control cabinet power supply, a frequency converter and an elevator main control, wherein the storage battery, the control cabinet power supply, the frequency converter and the elevator main control are respectively connected with the elevator emergency power supply circuit; the elevator emergency power supply circuit is connected with a mains supply circuit;
the elevator emergency power supply circuit is used for detecting an abnormal state of the mains supply, and when the mains supply is abnormal, the elevator emergency power supply circuit switches the storage battery to supply power, and the storage battery supplies power for the control cabinet power supply and the frequency converter;
the elevator emergency power supply circuit boosts a power supply of the storage battery to supply power for the control cabinet power supply and the frequency converter; the control cabinet power supply supports alternating current and direct current input.
2. The elevator emergency power supply device of claim 1, wherein the elevator emergency power supply circuit comprises an AC220 input detection module, a charging module, a dc310 boost module, a bus voltage detection module, a single-phase switching module, a bus switching module, a sleep module, an auxiliary source module, and a main control module driving the modules of the elevator emergency power supply circuit;
the AC220 input detection module is respectively connected with the mains supply, the charging module and the main control module, and the AC220 input detection module is used for detecting and determining the input state of the mains supply;
the charging module is connected with the storage battery and is used for charging the storage battery;
the direct current 310 boosting module is respectively connected with the storage battery, the single-phase switching module and the bus switching module; the direct current 310 boosting module is used for boosting the direct current low voltage output by the storage battery to direct current 310V to supply power to the control cabinet power supply and the frequency converter bus;
the bus voltage detection module is connected with the frequency converter bus and is used for detecting positive and negative detection of the frequency converter bus voltage and judging the abnormal condition of the mains supply;
the single-phase switching module is respectively connected with the mains supply and the control cabinet power supply, and is used for switching the elevator emergency power supply device to supply power to the control cabinet power supply when the mains supply is abnormal;
the bus switching module is connected with the frequency converter bus and is used for switching the elevator emergency power supply device to supply power to the frequency converter bus when the commercial power is abnormal;
the dormancy module is respectively connected with the storage battery and the direct current 310 boosting module and is used for disconnecting the storage battery from the elevator emergency power supply device;
the auxiliary source module is respectively connected with the AC220 input detection module, the charging module, the direct current 310 boosting module, the bus voltage detection module, the single-phase switching module, the bus switching module and the dormancy module, and is used for supplying power to all the functional modules.
3. The emergency power supply method of an elevator emergency power supply device of claim 2, wherein the elevator emergency power supply device is configured to perform the emergency power supply method, the emergency power supply method comprising:
detecting abnormal conditions of the mains supply;
when the commercial power is determined to be normal, the elevator emergency power supply device, the control cabinet power supply and the frequency converter supply power to be supplied by the commercial power, and the storage battery is charged through a charging module of the elevator emergency power supply device;
the bus voltage detection module is connected with a frequency converter bus for voltage measurement;
the storage battery is connected with the direct current 310 boosting module and the auxiliary element module;
the auxiliary source module and the main control module work normally;
when the commercial power is determined to be abnormal, the single-phase switching module switches a control cabinet power supply to be connected with the direct current 310 boosting module, so that an output interface of the direct current 310 boosting module is connected to the control cabinet power supply;
the bus switching module switches the connection of a frequency converter bus and the direct current 310 boosting module, so that an output interface of the direct current 310 boosting module is connected to the frequency converter bus;
the voltage of the storage battery is boosted into direct-current 310V voltage through the direct-current 310 boosting module in a push-pull way so as to supply power for the control cabinet power supply and the frequency converter bus;
the main control module sends a starting rescue signal to the elevator main control;
the elevator main control is used for outputting a rescue stopping signal;
the elevator emergency power supply device stops power supply output after the main control module receives a rescue stopping signal;
resetting the single-phase switching module and resetting the bus switching module;
the main control module starts dormancy timing when the AC220 input detection module detects that no commercial power is input;
when the dormancy timing reaches an expected value, the elevator emergency power supply device enters a dormancy state.
4. The emergency power supply method of the emergency power supply device for the elevator according to claim 3, wherein the detecting of the abnormal condition of the utility power specifically comprises:
the frequency converter is used for detecting single-phase abnormality of the commercial power;
the elevator emergency power supply device only takes T, N wires at a three-phase power wire inlet end, and the AC220 input detection module detects the mains supply input state of T, N wires;
the bus voltage detection module in the elevator emergency power supply device is used for detecting the abnormality of the frequency converter and the elevator main control voltage;
and when the AC220 input detection module, the bus voltage detection module and the single-phase abnormality detection of the frequency converter do not detect abnormality, the commercial power is considered to be normal.
5. An emergency power supply method for an elevator emergency power supply device according to claim 3, wherein when the commercial power is determined to be normal, the commercial power enters the elevator emergency power supply device, and the battery is charged by the charging module, specifically comprising:
the commercial power is converted into direct-current voltage 310V through a rectifier bridge in the charging module, and then is converted into direct-current voltage 41V through flyback topology conversion to charge the storage battery;
the charging module output voltage positive end is equipped with fuse and diode with the battery positive end, the input of diode is connected with the charging module, the output of diode is connected with the fuse, the input of fuse with the diode is connected the output of fuse is connected with the battery, the fuse is used for preventing when charging module output short circuit and overload damages the battery, when the diode prevents the commercial power disconnection, battery voltage flows backward and gets into the charging module.
6. The emergency power supply method of an elevator emergency power supply device according to claim 3, wherein when it is determined that the mains supply is abnormal, the single-phase switching module makes a switching action, so that the output interface of the direct-current 310 boosting module is connected to the power supply of the control cabinet, and the bus switching module makes a switching action, so that the output interface of the direct-current 310 boosting module is connected to a bus of a frequency converter, specifically comprising:
a diode is arranged between the single-phase switching module and the control cabinet power supply and used for preventing the control cabinet power supply voltage from flowing backwards;
and a diode is arranged between the bus switching module and the frequency converter bus and used for preventing the voltage of the frequency converter bus from flowing backwards.
7. The emergency power supply method of the elevator emergency power supply device according to claim 3, wherein the direct-current low voltage output by the storage battery is boosted to direct-current 310V voltage through the direct-current 310 boost module in a push-pull manner, and the direct-current 310V voltage supplies power to the control cabinet power supply and the frequency converter bus, and specifically comprises the following steps:
the control mode of the direct current 310 boosting module adopts a digital control mode, and the main control module controls the output voltage through PWM.
8. The emergency power supply method of an elevator emergency power supply device according to claim 3, wherein the sleep module acts to disconnect the battery from the dc310 boost module and the auxiliary module, and specifically comprises:
the AC220 input detection module cuts off the power supply of the storage battery to the elevator emergency power supply device when the input of the commercial power is not detected within 30 minutes;
the AC220 input detection module detects a normal input of the mains supply and the elevator emergency power supply is activated.
9. An elevator emergency power supply according to claim 1, characterized by comprising:
the elevator emergency power supply device also comprises a key display panel and an input switch;
the key display board is connected with the main control module and comprises four keys and a four-bit nixie tube for displaying and setting parameter information;
the input switch is a ship-shaped switch and is used for outputting the enabling of the elevator emergency power supply device.
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|---|---|---|---|
| CN202310969518.5A CN116995795A (en) | 2023-08-02 | 2023-08-02 | Elevator emergency power supply device and emergency power supply method |
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| CN202310969518.5A CN116995795A (en) | 2023-08-02 | 2023-08-02 | Elevator emergency power supply device and emergency power supply method |
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