CN103683955A - Direct current converter and power supply system - Google Patents
Direct current converter and power supply system Download PDFInfo
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- CN103683955A CN103683955A CN201310719535.XA CN201310719535A CN103683955A CN 103683955 A CN103683955 A CN 103683955A CN 201310719535 A CN201310719535 A CN 201310719535A CN 103683955 A CN103683955 A CN 103683955A
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- direct current
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The embodiment of the invention provides a direct current converter and a power supply system. According to the direct current converter provided by the embodiment of the invention, the direct current converter is compatible with the working modes of LLC full-bridge and LLC half-bridge by controlling the conducting states of a first switching tube, a second switching tube, a third switching tube and a fourth switching tube of a switch bridge through a control circuit and changing the conducting mode of the switch bridge so as to switch the working mode of the direct current converter, thus compatible output of a plurality of voltages can be realized, the requirement that primary power supply is output in a wide range is realized, the development and maintenance cost is reduced, and the output efficiency is improved.
Description
Technical field
The embodiment of the present invention relates to circuit engineering, relates in particular to a kind of direct current transducer and electric power system.
Background technology
In video monitoring scene, the main flow power supply voltage level of video monitoring equipment is 12V/24V, power supply unit such as small-sized solar power supply unit, civil power input etc.
For the application demand that adopts civil power input, in order to adapt to main flow power supply grade, be convenient to battery type selecting, require charging device need to meet the requirement of wide range output primary power source, as 12V/24V is compatible, export.
Traditional technology is to adopt Active PFC (Power Factor Correction is called for short PFC) busbar voltage, and forward conversion is realized wide range output.Yet normal shock is a kind of hard switching technology, circuit cost is high, and switching loss is larger, causes efficiency lower.
Summary of the invention
The embodiment of the present invention provides a kind of direct current transducer and electric power system, to solve the problem that efficiency is low, cost is high of the wide range output primary power source of prior art.
First aspect, the embodiment of the present invention provides a kind of direct current transducer, comprising: switch bridge, LLC resonant circuit, main transformer, control circuit, circuit of synchronous rectification, filter circuit and sample circuit; Wherein,
Described switch bridge, comprises the first switching tube, second switch pipe, the 3rd switching tube and the 4th switching tube that full-bridge type connects;
Described LLC resonant circuit, comprises the resonant capacitance, resonant inductance and the magnetizing inductance that are connected in series; The former limit winding parallel of described magnetizing inductance and described main transformer; The two ends of described LLC resonant circuit respectively with described the first switching tube and second switch pipe between shared tie point and the shared tie point between described the 3rd switching tube and the 4th switching tube be connected;
The secondary winding of described main transformer comprises the first winding and the second winding;
Described circuit of synchronous rectification comprises at least two rectifying tubes; The positive pole of described at least two rectifying tubes is connected with the non-common port of described the first winding and the second winding respectively, and the negative pole of described at least two rectifying tubes connects and ground connection;
Described filter circuit, is connected with the common port of described the first winding and the second winding and ground connection;
Described sample circuit, is connected with the common port of the second winding with described the first winding, for obtaining the output voltage of described direct current transducer;
Described control circuit, be connected with described sample circuit, in order to by controlling the conducting state of described the first switching tube, second switch pipe, the 3rd switching tube and the 4th switching tube, change the conduction mode of described switch bridge, to switch the mode of operation of described direct current transducer; Wherein, the conduction mode of described switch bridge comprises full-bridge type conducting and semibridge system conducting; Accordingly, the mode of operation of described direct current transducer comprises LLC full-bridge and LLC half-bridge.
According to first aspect, in the possible implementation of the first of first aspect, described control circuit, also for the output voltage of the described direct current transducer that obtains according to control signal and described sample circuit, determines whether to switch the mode of operation of described direct current transducer.
The implementation possible according to the first of first aspect, in the possible implementation of the second of first aspect, described filter circuit comprises filter capacitor.
The implementation possible according to the second of first aspect, in the third possible implementation of first aspect, it is inner that described magnetizing inductance is integrated in described main transformer.
According to the first of first aspect, first aspect, to any one in the third possible implementation, in the 4th kind of possible implementation of first aspect, described control signal is manually input, or system generates.
According to the 4th of first aspect the kind of possible implementation, in the 5th kind of possible implementation of first aspect, described switching tube, afterflow device are metal-oxide-semiconductor.
Second aspect, the embodiment of the present invention provides a kind of electric power system, described electric power system: comprising: power supply, load, and the direct current transducer that provides of any embodiment of the present invention.
The direct current transducer that the embodiment of the present invention provides and electric power system, the conducting state of the first switching tube, second switch pipe, the 3rd switching tube and the 4th switching tube by control circuit control switch bridge, change the conduction mode of switch bridge, to switch the mode of operation of direct current transducer, make the mode of operation of the compatible LLC full-bridge of direct current transducer and LLC half-bridge, can realize the compatibility output of a plurality of voltages, realized the demand of wide range output primary power source, reduce development and maintenance cost, improved delivery efficiency.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The structural representation of the direct current transducer that Fig. 1 provides for the embodiment of the present invention;
The structural representation of the electric power system that Fig. 2 provides for the embodiment of the present invention.
Embodiment
For making object, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
The structural representation of the direct current transducer that Fig. 1 provides for the embodiment of the present invention.As shown in Figure 1, the direct current transducer 1 that the embodiment of the present invention provides can comprise: switch bridge 11, by resonant capacitance 12, resonant inductance 13 and magnetizing inductance 14 by being connected in series LLC resonant circuit, main transformer 15, control circuit 16, the circuit of synchronous rectification being formed by rectifying tube 17 and rectifying tube 18, filter circuit 19 and the sample circuit 20 forming; Wherein,
Described switch bridge 11, can comprise the first switching tube 111, second switch pipe 112, the 3rd switching tube 113 and the 4th switching tube 114 that adopt full-bridge type to connect; Shared tie point between described the first switching tube 111 and second switch pipe 112 is tie point B; Shared tie point between described the 3rd switching tube 113 and the 4th switching tube 114 is tie point B; Described resonant capacitance 12 is connected with described tie point B; Described magnetizing inductance 14 be connected with described tie point A;
The former limit winding parallel of described magnetizing inductance 14 and described main transformer 15;
The secondary winding of described main transformer 15 comprises the first winding 151 and the second winding 152;
The positive pole of described rectifying tube 17 is connected with the port a of described the first winding 151; The positive pole of described rectifying tube 18 is connected with the port b of described the second winding 152; The negative pole of described rectifying tube 17 is connected with the negative pole of described rectifying tube 18 and ground connection;
Described filter circuit 19, is connected with the common port c of described the first winding 151 and described the second winding 152 and ground connection;
Described sample circuit 20, is connected with the common port c of described the second winding 152 with described the first winding 151, for obtaining the output voltage V out of described direct current transducer 1;
Described control circuit 16, be connected with described sample circuit 20, in order to pass through to control the conducting state of described the first switching tube 111, second switch pipe 112, the 3rd switching tube 113 and the 4th switching tube 114, change the conduction mode of described switch bridge 11, to switch the mode of operation of described direct current transducer 1; Wherein, the conduction mode of described switch bridge 11 comprises full-bridge type conducting and semibridge system conducting; Accordingly, the mode of operation of described direct current transducer 1 comprises LLC full-bridge and LLC half-bridge.
The direct current transducer that the embodiment of the present invention provides, the conducting state of the first switching tube, second switch pipe, the 3rd switching tube and the 4th switching tube by control circuit control switch bridge, change the conduction mode of switch bridge, to switch the mode of operation of direct current transducer, make the mode of operation of the compatible LLC full-bridge of direct current transducer and LLC half-bridge, can realize the compatibility output of a plurality of voltages, realized the demand of wide range output primary power source, reduce development and maintenance cost, improved delivery efficiency.
On the basis of above-described embodiment, described control circuit 16, also for the output voltage of the described direct current transducer 1 that obtains according to control signal and described sample circuit 20, determines whether to switch the mode of operation of described direct current transducer.Particularly, if the output voltage of the described direct current transducer 1 that described sample circuit 20 obtains is consistent with the output voltage of control signal indication, described control circuit 16 judges that the current output voltage of described direct current transducer 1 meets the requirement of control signal, thereby determines the mode of operation of not switching described direct current transducer 1; If the output voltage of the output voltage of the described direct current transducer 1 that described sample circuit 20 obtains and control signal indication is inconsistent, described control circuit 16 judges that the current output voltage of described direct current transducer 1 does not meet the requirement of control signal, thereby determines the mode of operation that need to switch described direct current transducer 1.
On the basis of above-described embodiment, the conduction mode of supposing current described switch bridge 11 is full-bridge type conducting, the current mode of operation of described direct current transducer 1 is LLC full-bridge, its output voltage is V0, for example, output voltage is 24V, and now, the former limit winding voltage of described main transformer 15 is similar to +/-400V, when described control signal requires the output voltage of described direct current transducer 1, be 0.5V0, for example, requirement output voltage is 12V, while requiring the mode of operation of described direct current transducer 1 to be switched to LLC half-bridge, control circuit 16 disconnects by controlling described the 3rd switching tube 113 according to the parameter of configuration, and control described the 4th switching tube 114 closures, thereby the conduction mode of described switch bridge 11 is switched to semibridge system conducting from full-bridge type conducting, now, the approximate +/-200V of former limit winding voltage of described main transformer 15, thereby realized for example 12V/24V of V0/0.5V0() compatibility output, and realized the switching of output voltage.In reality, each self-corresponding configuration parameter of full-bridge type conducting and semibridge system conducting can configure according to the actual requirements, it is example that the present embodiment be take the parameter that described the 3rd switching tube 113 disconnects and described the 4th switching tube 114 closures are semibridge system conducting, and the present invention is not as limit.
Optionally, described control circuit is DSP digital circuit.The loop of described V0/0.5V0 is controlled, protection is controlled all and realized with same DSP, does not need to revise peripheral parameter, and only need to configure two cover parameters can realize.Described direct current transducer 1 works in variable mode, and duty ratio approaches 50%, but will leave enough dead bands, prevents from leading directly to; Operating frequency is placed on resonance frequency (jointly being determined by described resonant capacitance 12, resonant inductance 13 and magnetizing inductance 14) the right.In work duty ratio, resonant capacitance 12, resonant inductance 13 participates in resonance, and making primary current is sinusoidal waveform, and on each switching tube, surface current can two-way flow; In Dead Time, described resonant capacitance 12, resonant inductance 13 and magnetizing inductance 14 participate in resonance.Before former limit switching tube is opened, electric current flows to the D utmost point by the S utmost point, moves the voltage above it to 0V rapidly, thereby makes former limit switch tube zero voltage open-minded; Before rectifying tube turn-offs, because resonance changes current reduction above it to 0A, thereby make rectifying tube zero-current switching.When the current mode of operation of described direct current transducer 1 is LLC half-bridge.
Optionally, described filter circuit 19 can comprise filter capacitor.Further, described magnetizing inductance 14 can be integrated in described main transformer 15 inside.
On the basis of above-described embodiment, described control signal can be for manually input or system generate; In reality, described control signal is that a kind of possible implementation of manually input is: by toggle switch is set in system, when operating personnel determine while will switch the mode of operation of described direct current transducer 1, manually control described toggle switch to transmit control signal to described control circuit 16.Described control signal is that a kind of possible implementation that system generates is: system increases an output signal newly, the output voltage information that described output signal carrying system requires.Further, described switching tube, afterflow device can be metal-oxide-semiconductor.Described control circuit 16 drives former limit switching tube by isolating transformer, and carries out parameter designing according to the output demand of V0/I0, thereby can meet the output demand of 0.5V0/I0.
The structural representation of the electric power system that Fig. 2 provides for the embodiment of the present invention.As shown in Figure 2, the electric power system 2 that the embodiment of the present invention provides comprises: power supply 21, load 22, and the direct current transducer 1 that provides of any embodiment of the present invention.
The electric power system that the embodiment of the present invention provides, the conducting state of the first switching tube, second switch pipe, the 3rd switching tube and the 4th switching tube by direct current transducer 1 control circuit control switch bridge, change the conduction mode of switch bridge, to switch the mode of operation of direct current transducer, make the mode of operation of the compatible LLC full-bridge of direct current transducer and LLC half-bridge, can realize the compatibility output of a plurality of voltages, realized the demand of wide range output primary power source, reduce development and maintenance cost, improved delivery efficiency.
In several embodiment provided by the present invention, should be understood that disclosed apparatus and method can realize by another way.For example, device embodiment described above is only schematic, for example, the division of described unit, be only that a kind of logic function is divided, during actual realization, can have other dividing mode, for example a plurality of unit or assembly can in conjunction with or can be integrated into another system, or some features can ignore, or do not carry out.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, indirect coupling or the communication connection of device or unit can be electrically, machinery or other form.
The described unit as separating component explanation can or can not be also physically to separate, and the parts that show as unit can be or can not be also physical locations, can be positioned at a place, or also can be distributed in a plurality of network element.Can select according to the actual needs some or all of unit wherein to realize the object of the present embodiment scheme.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, can be also that the independent physics of unit exists, and also can be integrated in a unit two or more unit.Above-mentioned integrated unit both can adopt the form of hardware to realize, and the form that also can adopt hardware to add SFU software functional unit realizes.
The integrated unit that the above-mentioned form with SFU software functional unit realizes, can be stored in a computer read/write memory medium.Above-mentioned SFU software functional unit is stored in a storage medium, comprise that some instructions are with so that a computer equipment (can be personal computer, server, or the network equipment etc.) or processor (processor) carry out the part steps of method described in each embodiment of the present invention.And aforesaid storage medium comprises: various media that can be program code stored such as USB flash disk, portable hard drive, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disc or CDs.
Those skilled in the art can be well understood to, for convenience and simplicity of description, only the division with above-mentioned each functional module is illustrated, in practical application, can above-mentioned functions be distributed and by different functional modules, completed as required, the internal structure that is about to device is divided into different functional modules, to complete all or part of function described above.The specific works process of the device of foregoing description, can, with reference to the corresponding process in preceding method embodiment, not repeat them here.
Finally it should be noted that: each embodiment, only in order to technical scheme of the present invention to be described, is not intended to limit above; Although the present invention is had been described in detail with reference to aforementioned each embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or some or all of technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (7)
1. a direct current transducer, is characterized in that, comprising:
Switch bridge, LLC resonant circuit, main transformer, control circuit, circuit of synchronous rectification, filter circuit and sample circuit; Wherein,
Described switch bridge, comprises the first switching tube, second switch pipe, the 3rd switching tube and the 4th switching tube that full-bridge type connects;
Described LLC resonant circuit, comprises the resonant capacitance, resonant inductance and the magnetizing inductance that are connected in series; The former limit winding parallel of described magnetizing inductance and described main transformer; The two ends of described LLC resonant circuit respectively with described the first switching tube and second switch pipe between shared tie point and the shared tie point between described the 3rd switching tube and the 4th switching tube be connected;
The secondary winding of described main transformer comprises the first winding and the second winding;
Described circuit of synchronous rectification comprises at least two rectifying tubes; The positive pole of described at least two rectifying tubes is connected with the non-common port of described the first winding and the second winding respectively, and the negative pole of described at least two rectifying tubes connects and ground connection;
Described filter circuit, is connected with the common port of described the first winding and the second winding and ground connection;
Described sample circuit, is connected with the common port of the second winding with described the first winding, for obtaining the output voltage of described direct current transducer;
Described control circuit, be connected with described sample circuit, in order to by controlling the conducting state of described the first switching tube, second switch pipe, the 3rd switching tube and the 4th switching tube, change the conduction mode of described switch bridge, to switch the mode of operation of described direct current transducer; Wherein, the conduction mode of described switch bridge comprises full-bridge type conducting and semibridge system conducting; Accordingly, the mode of operation of described direct current transducer comprises LLC full-bridge and LLC half-bridge.
2. direct current transducer according to claim 1, is characterized in that:
Described control circuit, also for the output voltage of the described direct current transducer that obtains according to control signal and described sample circuit, determines whether to switch the mode of operation of described direct current transducer.
3. direct current transducer according to claim 2, is characterized in that:
Described filter circuit comprises filter capacitor.
4. direct current transducer according to claim 3, is characterized in that:
It is inner that described magnetizing inductance is integrated in described main transformer.
5. according to the direct current transducer described in claim 1-4 any one, it is characterized in that:
Described control signal is manually input, or system generates.
6. direct current transducer according to claim 5, is characterized in that:
Described switching tube, afterflow device are metal-oxide-semiconductor.
7. an electric power system, is characterized in that: comprising: power supply, load, and the direct current transducer as described in claim 1-6 any one.
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| CN201310719535.XA CN103683955A (en) | 2013-12-20 | 2013-12-20 | Direct current converter and power supply system |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103944396A (en) * | 2014-04-11 | 2014-07-23 | 燕山大学 | LLC resonance type three-port DC-DC converter and control method thereof |
| CN105141135A (en) * | 2015-08-31 | 2015-12-09 | 天津电气科学研究院有限公司 | Control method for multi-way parallel full-bridge LLC converter in cascading power supply system |
| CN105207484A (en) * | 2015-08-31 | 2015-12-30 | 天津电气科学研究院有限公司 | Novel full-bridge LLC no-load and loaded voltage control method |
| CN105515398A (en) * | 2015-12-02 | 2016-04-20 | 中国电子科技集团公司第四十一研究所 | High-efficiency power circuit applied to programmable DC power |
| CN106160063A (en) * | 2015-05-13 | 2016-11-23 | 意法半导体(鲁塞)公司 | The method changing for the mode of operation controlling electromechanical component and relevant device |
| CN106411139A (en) * | 2016-10-20 | 2017-02-15 | 华北电力大学 | Control method for LLC current converter with wide output range |
| WO2018019100A1 (en) * | 2016-07-25 | 2018-02-01 | 中兴通讯股份有限公司 | Control method and device of three-phase half-bridge llc resonant converter |
| CN108258910A (en) * | 2017-12-25 | 2018-07-06 | 浙江大学 | A kind of full-bridge LLC resonant transform circuits and its wide range output control method |
| CN108988637A (en) * | 2018-07-06 | 2018-12-11 | 华为技术有限公司 | Three phase full bridge LLC circuit direct gain control method, device and charging pile |
| CN112019058A (en) * | 2020-08-14 | 2020-12-01 | 苏州浪潮智能科技有限公司 | Output self-adaptive server power supply control system and method |
| US11315723B2 (en) | 2017-10-20 | 2022-04-26 | Delta Electronics (Thailand) Public Company Limited | Power module and power circuit |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103944396A (en) * | 2014-04-11 | 2014-07-23 | 燕山大学 | LLC resonance type three-port DC-DC converter and control method thereof |
| CN106160063A (en) * | 2015-05-13 | 2016-11-23 | 意法半导体(鲁塞)公司 | The method changing for the mode of operation controlling electromechanical component and relevant device |
| US10170258B2 (en) | 2015-05-13 | 2019-01-01 | Stmicroelectronics (Rousset) Sas | Method for controlling a change of operating state of an electromechanical component and corresponding device |
| CN105141135A (en) * | 2015-08-31 | 2015-12-09 | 天津电气科学研究院有限公司 | Control method for multi-way parallel full-bridge LLC converter in cascading power supply system |
| CN105207484A (en) * | 2015-08-31 | 2015-12-30 | 天津电气科学研究院有限公司 | Novel full-bridge LLC no-load and loaded voltage control method |
| CN105141135B (en) * | 2015-08-31 | 2017-12-29 | 天津电气科学研究院有限公司 | The control method of multi-channel parallel full-bridge LLC converters in a kind of cascading power source system |
| CN105207484B (en) * | 2015-08-31 | 2018-01-16 | 天津电气科学研究院有限公司 | A kind of new full-bridge LLC is unloaded and with voltage control method when carrying |
| CN105515398B (en) * | 2015-12-02 | 2018-03-13 | 中国电子科技集团公司第四十一研究所 | A kind of high efficiency power circuit applied to programme-controlled dc power |
| CN105515398A (en) * | 2015-12-02 | 2016-04-20 | 中国电子科技集团公司第四十一研究所 | High-efficiency power circuit applied to programmable DC power |
| WO2018019100A1 (en) * | 2016-07-25 | 2018-02-01 | 中兴通讯股份有限公司 | Control method and device of three-phase half-bridge llc resonant converter |
| CN107659161A (en) * | 2016-07-25 | 2018-02-02 | 中兴通讯股份有限公司 | A kind of control method and device of three-phase half-bridge LLC controlled resonant converters |
| CN106411139A (en) * | 2016-10-20 | 2017-02-15 | 华北电力大学 | Control method for LLC current converter with wide output range |
| CN106411139B (en) * | 2016-10-20 | 2019-08-30 | 华北电力大学 | A kind of control method of width output area LLC current transformer |
| US11315723B2 (en) | 2017-10-20 | 2022-04-26 | Delta Electronics (Thailand) Public Company Limited | Power module and power circuit |
| CN108258910A (en) * | 2017-12-25 | 2018-07-06 | 浙江大学 | A kind of full-bridge LLC resonant transform circuits and its wide range output control method |
| CN108988637A (en) * | 2018-07-06 | 2018-12-11 | 华为技术有限公司 | Three phase full bridge LLC circuit direct gain control method, device and charging pile |
| CN112019058A (en) * | 2020-08-14 | 2020-12-01 | 苏州浪潮智能科技有限公司 | Output self-adaptive server power supply control system and method |
| CN112019058B (en) * | 2020-08-14 | 2022-03-04 | 苏州浪潮智能科技有限公司 | Output self-adaptive server power supply control system and method |
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Application publication date: 20140326 |