CN108462249A - A kind of UPS and machine controls power supply - Google Patents
A kind of UPS and machine controls power supply Download PDFInfo
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- CN108462249A CN108462249A CN201810082677.2A CN201810082677A CN108462249A CN 108462249 A CN108462249 A CN 108462249A CN 201810082677 A CN201810082677 A CN 201810082677A CN 108462249 A CN108462249 A CN 108462249A
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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
- H02J9/02—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which an auxiliary distribution system and its associated lamps are brought into service
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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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- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses a kind of UPS and machine control power supplys, including at least 2 UPS in parallel, UPS include input power, rectifier, inverter, control circuit, be coupled to communication bus and machine information processing feedback circuit, control circuit includes the output voltage detecting circuit for being coupled to UPS output ends, is coupled to the controller of output voltage detecting circuit, is coupled to controller to receive the logic switch control circuit of processing signal, connects remaining UPS and the working condition of all UPS is sent to the combining system communication interface circuit on communication bus；And the setting of machine information processing feedback circuit can be by analyzing processing in each UPS output voltage Set, then in the corresponding processing signal to the controller of each UPS of output, when the property of each UPS output voltage is inconsistent, the corresponding processing signal of output keeps the property of each UPS output voltage consistent, reduce circulation between each UPS, extends UPS service lifes.
Description
Technical field
The present invention relates to power-supply device technical fields, more specifically, it relates to a kind of UPS and machine control power supply.
Background technology
UPS (Uninterruptible Power Supply), is that accumulator is connected with host, passes through host inversion
Direct current is converted into the system equipment of alternating current by the modular circuits such as device.UPS is widely used in telecommunications, finance, government, manufacture etc.
Multiple industries can provide continual power supply for equipment, and so that user is unlikely to influences work because of having a power failure or lose data.
It primarily serves two effects in the application of power supply system：First, Emergency use, prevents from powering off suddenly and influencing normal work,
It is damaged to equipment and data；Second is that eliminating surge, instant high-voltage, moment low-voltage, electric wire noise and the frequency on alternating current
" power pollutions " such as rate offsets, improves power quality, the power supply of high quality is provided for system.
As shown in Figure 1, for the simplified basic schematic diagram of UPS, mains signal is for conversion into direct current energy by rectifier
Amount remaps as the AC signal output of high quality using inverter, is load supplying；Alternating current passes through charger simultaneously
It charges to battery.When alternating current occurs abnormal, the direct current signal of battery is for conversion into the AC signal of high quality by inverter
Output, continues as load supplying incessantly.When inverter stops exporting, mains signal passes through static by-pass line and quiet
State switchs, and is directly load supplying；Meanwhile alternating current still can charge to accumulator by charger.
For important load, double conversion on line type UPSs with static by-pass still cannot meet the need of power supply reliability
It asks, industry would generally ensure higher reliability using the technology of " redundant parallel ".As shown in Fig. 2, it is superfluous for a kind of parallel connection
Remaining and machine schematic diagram, i.e. two UPS are directly in parallel using output, provide the scheme that electric power exports to load jointly.Two UPS
When parallel redundancy and machine operation, firewire, the zero curve of output are connected in parallel and export jointly completely, the original of redundancy running
Reason is：When the normal inversion of two-shipper works, the load of each band 50% stream output is common to provide the output of inversion electric power to load.When
When any one UPS fault of converter, its output is automatically closed in failure UPS, and load is supplied by another UPS independence inversions output
Electricity.After two UPS inverters equal failure, load turns without interruption automatically by static switch by alternating current bypass power supply.When and
Only when two equal failures of UPS inverters, while when alternating current is abnormal, the normal work of load can be just influenced.
But above-mentioned parallel redundancy and machine mode be by and machine UPS outputs it is directly in parallel, which at runtime,
When the voltage magnitude of Ruo Getai UPS, frequency, phase are not quite identical, they cannot accomplish the completely the same of output current（I.e.
Load sharing）If difference is larger to may also result in circulation short circuit, equipment is damaged.
Invention content
In view of the deficiencies of the prior art, the present invention intends to provide a kind of UPS and machine controls power supply, by right
The real-time collection analysis of each UPS output voltage amplitude, frequency, phase so that each UPS can be in communication with each other and export more one
The AC signal of cause reduces the circulation between each UPS, to extend the service life of UPS to loading.
To achieve the above object, the present invention provides following technical solutions：
A kind of UPS and machine control power supply, including at least 2 UPS in parallel, UPS include input power, rectifier, inverter,
Static switch and control circuit, the control circuit include：
Output voltage detecting circuit is coupled to UPS output ends, the property for detecting UPS output voltages, and exports corresponding anti-
Feedback signal；The property of the voltage includes voltage magnitude, frequency and phase；
Controller is coupled to the output voltage detecting circuit to receive corresponding signal, corresponding place is exported after analyzing processing
Manage signal；
Logic switch control circuit is coupled to the controller to receive the processing signal, and output control signal is quiet to control
The keying of state switch；
Combining system communication interface circuit connects remaining UPS and the working condition of all UPS is sent on communication bus；Institute
It states UPS and machine control power supply further includes：
And machine information handles feedback circuit, is coupled to communication bus to receive the working condition of all UPS, will locate after analyzing processing
Reason signal is sent to controller.
By using above-mentioned technical proposal, the setting of output voltage detecting circuit can detect every UPS by controller
Whether the property of output voltage is in the parameter area respectively set, to ensure the normal operation of each UPS first；Controller root
It is opened and closed according to the testing result control logic control switching circuit of UPS output voltages with achieving the purpose that control static switch so that
UPS being capable of normal operation；More UPS output voltages are sent to by combining system communication interface circuit and machine information processing feedback
In circuit, the property of each UPS output voltage is analyzed and determined, if the amplitude of each UPS output voltage, frequency and phase
Position correspondent equal respectively, then each UPS normal transmission, otherwise, and machine information processing feedback circuit output signal to controller with
Adjusting inconsistent voltage characteristic so that the output voltage of each UPS can be consistent, and reduce the circulation between each UPS,
To extend the service life of UPS.
Further, described and machine information processing feedback circuit includes the processor being electrically connected with the UPS output ends,
The processor receives UPS output voltages and correspondence analysis compares respectively to voltage characteristic, when having arbitrariness in UPS output voltages
When matter is inconsistent, the corresponding processing signal of processor output to the controller of corresponding UPS, the controller output calibration signal
With the property of the corresponding UPS output voltages of correction.
By using above-mentioned technical proposal, the property of each UPS output voltage is analyzed respectively using processor, when
When the property of each UPS output voltage is consistent, UPS normal transmissions；When there is arbitrary property inconsistent in UPS output voltages,
The corresponding processing signal of processor output achievees the purpose that the corresponding UPS output voltage properties of correction to corresponding UPS controller.
Further, the processor includes voltage comparator, frequency comparator and phase comparator, and the voltage compares
The input terminal of device, frequency comparator and phase comparator is respectively coupled to UPS output voltages, to be respectively compared UPS output voltages
Amplitude, frequency and phase；When the multiple voltage magnitudes, frequency and the phase that compare have difference, corresponding processing signal is exported
To controller to adjust corresponding parameter.
By using above-mentioned technical proposal, processor includes voltage comparator, frequency comparator and phase comparator can
Processing, and the amplitude of UPS output voltages, frequency and phase are compared to the amplitude, frequency and phase of UPS output voltages respectively
It can be carried out at the same time analyzing processing, improve the analysis efficiency of processor.
Further, the reference point of the correspondence parameter of the controller adjustment is that multiple UPS output voltages correspond to parameter
Average value.
Further, described and machine information processing feedback circuit further includes the waveform control interface for being coupled to the controller
It is defeated that circuit and phase controlling interface circuit, the waveform control interface and phase controlling interface circuit receive controller respectively
The corresponding correction signal that goes out and amplitude, frequency and the phase for correcting signal in input inverter.
By using above-mentioned technical proposal, waveform control interface and the adjustable input inversion of phase controlling interface circuit
The amplitude, frequency and phase of voltage in device finally make more UPS output voltages to achieve the purpose that adjust UPS output voltages
Property can be consistent.
Further, the output voltage detecting circuit includes the voltage transformer being connected with the controller in a signal way., institute
State voltage transformer and export corresponding feedback signal to controller, judge UPS output voltages whether the output voltage set in UPS
In range.
Further, the input power uses ATS switchgears, and the ATS switchgears include main power source, accumulator and side
Road power supply；Wherein, the main power source and the bypass supply are all made of alternating current.
By using above-mentioned technical proposal, ATS switchgears can auto switching electric source, handoff response speed is fast.
Further, the UPS further includes direct current bus voltage detecting circuit, the rectifier is coupled to, for detecting
The property of rectifier output voltage, and corresponding detection signal is exported to controller, with control logic control switching circuit.
By using above-mentioned technical proposal, the property of rectifier output voltage is detected, whether just can therefrom reflect rectifier
Often work, can monitor the component in UPS in real time.
Further, the UPS further includes city's power detection circuit, the alternating current incoming end is coupled to, to have detected whether
Alternating current by and export corresponding detection signal to controller, with control logic control switching circuit.
By using above-mentioned technical proposal, whether detectable alternating current works normally, to control logic switch control circuit
To start corresponding input power.
Further, the UPS further includes the indicating circuit being connected with the controller in a signal way..
By using above-mentioned technical proposal, the operation conditions of each UPS is known in real time for operating personnel.
Compared with prior art, it is an advantage of the invention that：
1, the setting that feedback circuit is handled by simultaneously machine information can be by analyzing processing in each UPS output voltage Set, then
In the corresponding processing signal to the controller of each UPS of output, when the property of each UPS output voltage is consistent, UPS is normally supplied
Electricity；When the property of each UPS output voltage is inconsistent, and the corresponding processing signal of machine information processing feedback circuit output makes each
The property of UPS output voltages is consistent, reduces the circulation between each UPS, to extend the service life of UPS；
2, the component of UPS can be carried out by the setting of direct current bus voltage detecting circuit, city's power detection circuit and indicating circuit
Monitoring, personnel easy to operation know which component of UPS goes wrong in real time.
Description of the drawings
Fig. 1 is the UPS functional block diagrams in the background technology of the present invention；
Fig. 2 be the present invention background technology in parallel redundancy and machine schematic diagram；
Fig. 3 be the present invention and machine frame figure；
Fig. 4 is the block diagram of the control circuit of the present invention.
Reference numeral：100、UPS；110, ATS switchgears；120, rectifier；130, inverter；140, static switch；
150, control circuit；151, output voltage detecting circuit；152, controller；153, logic switch control circuit；154 and machine system
System communication interface circuit；155, waveform control interface；156, phase controlling interface circuit；157, DC bus-bar voltage detects
Circuit；158, city's power detection circuit；159, indicating circuit；200 and machine information handle feedback circuit；310, voltage comparator；
320, frequency comparator；330, phase comparator.
Specific implementation mode
With reference to the accompanying drawings and examples, the present invention will be described in detail.
A kind of UPS and machine controls power supply, with reference to Fig. 3, including at least 2 UPS100 in parallel, the present embodiment is with 3
For UPS100.Every UPS100 includes input power, rectifier 120, inverter 130, static switch 140 and control circuit
150, wherein it includes main power source, accumulator and bypass supply, master that input power, which uses ATS switchgears 110, ATS switchgears 110,
Power supply and bypass supply are all made of alternating current, and 3 in the present embodiment UPS100 shares an ATS switchgear 110, to improve
The consistency of UPS100 output voltages.The access load in parallel of static switch 140 of three UPS100.The controller of every UPS100
152 connect with data bus communication, and machine information processing feedback circuit 200 is coupled to communication bus to receive all UPS100
Working condition, processing signal is sent to controller 152 after analyzing processing so that the inconsistent UPS100 of output voltage can be into
Row adjust automatically, to reduce the circulation between each UPS100, to extend the service life of UPS100.
With reference to Fig. 4, control circuit 150 includes output voltage detecting circuit 151, controller 152, logic switch control circuit
153, combining system communication interface circuit 154, direct current bus voltage detecting circuit 157, city's power detection circuit 158 and indicating circuit
159, wherein controller 152 uses the digital signal processor of model TMS320C6000.Output voltage detecting circuit 151 wraps
Include the voltage transformer for detecting UPS100 output voltage properties being connect with 152 signal of controller, voltage transformer coupling
In UPS100 output ends, corresponding feedback signal is exported to controller 152, judges whether UPS100 output voltages set in UPS100
In fixed output voltage range.It should be noted that the property of voltage includes voltage magnitude, frequency and phase.Voltage transformer
After detecting corresponding UPS100 output voltages, the A D interface for being sent to controller 152 carries out level conversion, is exported as to UPS100
The Real-time Feedback signal of voltage.The setting range of UPS100 output voltages is provided in controller 152, in the setting range,
UPS100 output voltages are normal output；If UPS100 output voltages are not in the range of setting, then the output of controller 152 control
The signal of 110 Switching power of ATS switchgears processed, to ensure that UPS100 is in normal operating conditions.
Logic switch control circuit 153 is coupled to controller 152 to receive processing signal, and output control signal is to control
Corresponding logical relation control is completed in the keying of static switch 140.PLD can be used in logic switch control circuit 153, when
When UPS100 output voltages break down, the output phase is answered after controller 152 receives the feedback signal of output voltage detecting circuit 151
Processing signal to logic switch control circuit 153, the static switch 140 of closing fault UPS100 main circuits is supplied by accumulator
Electricity；After output voltage detecting circuit 151 detects storage battery power supply failure again, controller 152 exports corresponding place again
Signal is managed to logic switch control circuit 153 to open bypass supply.
Combining system communication interface circuit 154 can be wireless communication module, can send the working condition of each UPS100
Onto communication bus, and machine information processing feedback circuit 200 obtains each UPS100 output voltage signal by communication bus, and
Analyzing processing is carried out to each UPS100 output voltage signal.
Direct current bus voltage detecting circuit 157 is coupled to rectifier 120, the property for detecting 120 output voltage of rectifier
Matter, and corresponding detection signal is exported to controller 152, with control logic control switching circuit 153.Likewise, DC bus
Voltage transformer can be used in voltage detecting circuit 157, the ends AD of the detection signal input controller 152, can be to rectifier 120
Output voltage is monitored in real time, to judge whether rectifier 120 works normally, is supervised in real time to the component in UPS100
Control so that operating personnel can more be apparent from the position of damage after device fails.It should be noted that herein
The output end of rectifier 120 be also associated with DC bus current detection circuit, the electric current for detecting the output of rectifier 120 is big
Small, Hall sensor can be used in DC bus current detection circuit, which converts through Hall sensor, then through electricity
It is sent to the A D interface of controller 152 after flat match circuit, 120 output voltage of rectifier and electric current are monitored in real time, improves
The accuracy of detection.
City's power detection circuit 158 is coupled to alternating current incoming end, with detected whether alternating current by and export corresponding detection
Signal is to controller 152, with control logic control switching circuit 153.Current transformer can be used in city's power detection circuit 158, will
Electric main is sent to after current transformer converts in controller 152, to detect whether alternating current works normally, to control logic
Control switching circuit 153 is to start corresponding input power.
Several LED light can be used in indicating circuit 159, are connect with 152 signal of controller.3 can be used in the present embodiment
LED respectively represents three kinds of states of UPS100 operations, i.e. main circuit, bypass and storage battery power supply.
With reference to Fig. 3, and machine information processing feedback circuit 200 includes the processor being connect with communication bus, and processor can connect
UPS100 output voltages and correspondence analysis compares respectively to voltage characteristic are received, when thering is arbitrary property to differ in UPS100 output voltages
When cause, the corresponding processing signal of processor output to the controller 152 of corresponding UPS100,152 output calibration signal of controller
With the property of the corresponding UPS100 output voltages of correction.
Processor includes voltage comparator 310, frequency comparator 320 and phase comparator 330, voltage comparator 310, frequency
The input terminal of rate comparator 320 and phase comparator 330 is respectively coupled to UPS100 output voltages, defeated to be respectively compared UPS100
Go out the amplitude, frequency and phase of voltage.It should be noted that simultaneously machine information processing feedback circuit 200 further includes for analyzing
Microcontroller can be used in the analyzer of UPS100 output voltage properties, analyzer, by the amplitude of each UPS100 output voltage, frequency
It is analyzed respectively with phase, and the comparison of voltage magnitude will be carried out in the voltage magnitude input voltage comparator 310 after analysis, will divided
The comparison that electric voltage frequency is carried out in electric voltage frequency input frequency comparator 320 after analysis, electricity is inputted by the voltage-phase after analysis
Press the comparison that voltage-phase is carried out in comparator 310.When multiple voltage magnitudes, frequency and the phase compared, any one has difference
When, it exports corresponding processing signal and adjusts corresponding parameter to controller 152.The ginseng for the correspondence parameter that controller 152 adjusts
It is the average value that multiple UPS100 output voltages correspond to parameter according to value.For example, when there is the inconsistent situation of voltage magnitude, then
Several voltage magnitudes analyzed in input voltage comparator 310 are averaged, and the average value and adjustment signal are input to
In the controller 152 of corresponding UPS100 so that the output voltage amplitude of corresponding UPS100 can arrive the average value of setting so that more
The output voltage amplitude of platform UPS100 can be consistent.
With reference to Fig. 4, and machine information processing feedback circuit 200 further includes the waveform control interface electricity for being coupled to controller 152
Road 155 and phase controlling interface circuit 156, waveform control interface 155 and phase controlling interface circuit 156 receive control respectively
The corresponding correction signal of the output of device 152 processed and amplitude, frequency and the phase for correcting signal in input inverter 130.Waveform control
Amplitude, frequency and the phase of voltage in the adjustable input inverter 130 of interface circuit 155 and phase controlling interface circuit 156 processed,
To achieve the purpose that adjust UPS100 output voltages, finally enable the property of more UPS100 output voltages consistent.
It should be noted that above-mentioned all detection limits are sent to controller 152, the completion pair of controller 152 through A D interface
The analog/digital conversion of each analog parameter and number optimization filtering, filter out noise jamming, isolate useful signal, ensure inspection
Survey the authenticity and validity of signal.
The operation principle of the present embodiment：
By and machine information handle feedback circuit 200 setting can by analyzing processing in each UPS100 output voltage Set,
Then in the corresponding processing signal to the controller 152 of each UPS100 of output, when the property one of each UPS100 output voltage
When cause, UPS100 normal power supplies；When the property of each UPS100 output voltage is inconsistent, and machine information handles feedback circuit 200
The corresponding processing signal of output keeps the property of each UPS100 output voltage consistent, reduces the circulation between each UPS100, from
And extend the service life of UPS100.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of UPS and machine control power supply, including at least 2 UPS (100) in parallel, UPS (100) include input power, it is whole
Flow device (120), inverter (130), static switch (140) and control circuit (150), which is characterized in that the control circuit
(150) include：
Output voltage detecting circuit (151) is coupled to UPS (100) output end, the property for detecting UPS (100) output voltage
Matter, and export corresponding feedback signal；The property of the voltage includes voltage magnitude, frequency and phase；
Controller (152), is coupled to the output voltage detecting circuit (151) to receive corresponding signal, defeated after analyzing processing
Go out corresponding processing signal；
Logic switch control circuit (153) is coupled to the controller (152) to receive the processing signal, output control letter
Number to control the keying of static switch (140)；
Combining system communication interface circuit (154) connects remaining UPS (100) and send the working condition of all UPS (100)
Onto communication bus；The UPS and machine control power supply：
And machine information processing feedback circuit (200), communication bus is coupled to receive the working condition of (100) all UPS, is analyzed
Processing signal is sent to controller (152) after processing.
2. UPS according to claim 1 and machine control power supply, which is characterized in that described and machine information handles feedback circuit
(200) include the processor being electrically connected with the UPS (100) output end, the processor receives UPS (100) output voltage
And correspondence analysis compares respectively to voltage characteristic, when there is arbitrary property inconsistent in UPS (100) output voltage, processor is defeated
Go out corresponding processing signal to the controller (152) of (100) corresponding UPS, controller (152) the output calibration signal is with school
The property of positive corresponding UPS (100) output voltage.
3. UPS according to claim 2 and machine control power supply, which is characterized in that the processor includes voltage comparator
(310), frequency comparator (320) and phase comparator (330), the voltage comparator (310), frequency comparator (320) and
The input terminal of phase comparator (330) is respectively coupled to UPS (100) output voltage, to be respectively compared UPS (100) output voltage
Amplitude, frequency and phase；
When the multiple voltage magnitudes, frequency and the phase that compare have difference, export corresponding processing signal to controller (152) with
Adjust corresponding parameter.
4. UPS according to claim 3 and machine control power supply, which is characterized in that the correspondence of controller (152) adjustment
The reference point of parameter is the average value that multiple UPS (100) output voltage corresponds to parameter.
5. UPS according to claim 2 and machine control power supply, which is characterized in that described and machine information handles feedback circuit
(200) further include the waveform control interface (155) and phase controlling interface circuit for being coupled to the controller (152)
(156), the waveform control interface (155) and phase controlling interface circuit (156) receive controller (152) output respectively
Corresponding correction signal and correct amplitude, frequency and the phase of signal in input inverter (130).
6. the UPS and machine according to any one of claim 1-5 control power supply, which is characterized in that the output voltage
Detection circuit (151) includes the voltage transformer being connect with the controller (152) signal, and the voltage transformer the output phase is answered
Feedback signal to controller (152), judge UPS (100) output voltage whether the output voltage range set in UPS (100)
It is interior.
7. the UPS and machine according to any one of claim 1-5 control power supply, which is characterized in that the input power
Using ATS switchgears (110), the ATS switchgears (110) include main power source, accumulator and bypass supply；Wherein, the master
Power supply and the bypass supply are all made of alternating current.
8. the UPS and machine according to any one of claim 1-5 control power supply, which is characterized in that the UPS (100)
Further include direct current bus voltage detecting circuit (157), be coupled to the rectifier (120), for detecting rectifier (120) output
The property of voltage, and corresponding detection signal is exported to controller (152), with control logic control switching circuit (153).
9. UPS according to claim 8 and machine control power supply, which is characterized in that the UPS (100) further includes city's electric-examination
Slowdown monitoring circuit (158) is coupled to the alternating current incoming end, with detected whether alternating current by and export corresponding detection signal to controlling
Device (152) processed, with control logic control switching circuit (153).
10. UPS according to claim 1 and machine control power supply, which is characterized in that the UPS (100) further include with it is described
The indicating circuit (159) of controller (152) signal connection.
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| CN109450074A (en) * | 2018-12-11 | 2019-03-08 | 北京东道科技发展有限公司 | A kind of UPS and machine segmentation power supply energy conservation configures system |
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| CN112510644B (en) * | 2020-11-16 | 2023-08-22 | 科华恒盛股份有限公司 | Short circuit protection method and device for UPS parallel operation system and UPS |
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Application publication date: 20180828 |