CN204794705U - Multiplexed output flyback converter of uninterrupted power supply - Google Patents
Multiplexed output flyback converter of uninterrupted power supply Download PDFInfo
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- CN204794705U CN204794705U CN201520518534.3U CN201520518534U CN204794705U CN 204794705 U CN204794705 U CN 204794705U CN 201520518534 U CN201520518534 U CN 201520518534U CN 204794705 U CN204794705 U CN 204794705U
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- power supply
- lithium battery
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Abstract
The utility model discloses a multiplexed output flyback converter of uninterrupted power supply, including EMI filter circuit, rectification filter circuit, RCD absorption circuit, high -frequency transformer, UC3845 drive control chip, the charging circuit of lithium cell group, optical coupling isolation sampling circuit, sampling buffer circuit, TL431 sampling feedback circuit and ARM drive control ware. The utility model discloses in to other loads power supply, set up lithium batteries circuit of the same kind, give lithium batteries through the converter by the commercial power, when mains power supply break off, control switch switches over the circuit realized through the coupling between transformer winding that flyback converter gives other circuit outputs and supplies power by lithium cell group to reach the incessant function of multiplexed output. The utility model discloses circuit structure is simple, with low costs, easy to be realized, is suitable for very much miniwatt multiunit DC voltage output's occasion.
Description
Technical field
The utility model belongs to field of switch power, is specifically related to Multiple Output Flyback Converter.
Background technology
Along with Switching Power Supply develops rapidly, the occasion of its application is also more and more wider.In the different occasions of Switching Power Supply application, require also to be improved to the applicability of power supply.Be could continue there is output voltage in the uninterrupted situation of civil power for the Switching Power Supply in some occasion, when mains system power-off, have self-power generation system and power.But for low power occasion, Switching Power Supply can adopt lithium battery stand-by power supply to power, to meet the power demands of small-power occasion.
Anti exciting converter is actually One Buck-Boost converter body and adds that isolation high frequency transformer obtains, isolating transformer is the coupling inductance of a Multiple coil, there is the effect of energy storage, transformation and isolation, so the power output of converter is subject to the restriction of transformer energy storage, therefore, anti exciting converter can only be applicable to low power occasion.
In the design of direct-current switch power supply, anti exciting converter has the features such as circuit structure is simple, efficiency is high, cost is low, device is few; Therefore, the occasion of small-power many groups direct voltage output is often applied to.But when mains-supplied power-off, the power supply unit of multiple-channel output is with regard to cisco unity malfunction.Just need self-powered switched system to this, this system is very practical in small-power occasion.Therefore, self-powered system and the control of its power-off commutation circuit are the keys of this anti exciting converter.
Utility model content
The purpose of this utility model is to provide a kind of Multiple Output Flyback Converter of uninterrupted power supply, and circuit structure is simple, cost is low, easily realize, and is suitable for very much the occasion of small-power many groups direct voltage output.
The technical solution of the utility model is: a kind of Multiple Output Flyback Converter of uninterrupted power supply, comprise EMI filter circuit, current rectifying and wave filtering circuit, RCD absorption circuit, high frequency transformer, UC3845 drived control chip, lithium battery group charging circuit, light-coupled isolation sample circuit, sampling isolation circuit, TL431 sampling feedback circuit and ARM driving governor, it is characterized in that:
1 pin of UC3845 drived control chip is connected with the feedback signal terminal of light-coupled isolation sample circuit, 3 pin with detect resistance R
4connection, the power access end that 6 pin are connected with the PWM wave output terminal of MOS1 switching tube, 7 pin are chip, complete startup by divider resistance R during startup, afterwards by auxiliary induction L
0through diode D
5, electrochemical capacitor C
4and C
5power after rectifying and wave-filtering;
High frequency transformer is by former limit inductance L, and auxiliary winding inductance is L
0with four secondary inductance L
1, L
2, L
3and L
4composition, the inductance L of auxiliary winding
0different name terminating diode D
5, then receive filter capacitor C in parallel
4with electrochemical capacitor C
5on, then receive on Same Name of Ends, Same Name of Ends ground connection;
The former limit inductance L of high frequency transformer is through a MOS1 switching tube and a sampling resistor R
4ground connection, the drive circuit that the grid of MOS1 switching tube is made up of UC3845 drived control chip and its peripheral circuit is opened and shutoff to control it, sampling resistor R
4for current signal is converted into voltage signal, and then reach the effect detecting electric current;
In parallel by electric capacity C in the inductance L of former limit
0, resistance R
0with diode D
0the RCD absorption circuit of composition, in order to absorb peak voltage;
Output is secondary inductance L
1, L
2, L
3and L
4the multiple-channel output of composition, secondary inductance L
1and L
2the load-carrying two-way of composition anti exciting converter exports, a route diode D
1, electric capacity C
1with resistance R
1composition, another route diode D
2, electric capacity C
2with resistance R
2composition;
TL431 sampling feedback circuit is connected with light-coupled isolation sample circuit, sampled signal is fed back to UC3845 chip.
Wherein at secondary inductance L
3different name end accesses controllable switch S, for the switching of control circuit with protect over-charge of lithium battery.
Wherein secondary inductance L
3composition lithium battery group charging circuit, during charging, switch S closes; Secondary inductance L
4composition lithium battery group discharge circuit, at L
4different name end on accessed MOS2 switching tube, receive on lithium battery group positive pole, lithium battery group negative pole receives L
4same Name of Ends on.
Wherein TL431 sampling feedback circuit is by three-terminal voltage-stabilizing diode TL431, sampling resistor R
5and R
6, current-limiting resistance R
7, filter resistance R
8with filter capacitor C
7composition, obtains the sampled voltage of output V2.
Wherein ARM driving governor is connected with lithium battery group positive pole by overcharging testing circuit, commercial power rectification filtering voltage is connected with ARM controller by the output of sampling isolation circuit, for detecting civil power whether power-off, ARM by detection signal export pulsed drive control controllable switch S closed with turn off; By resistance R
5and R
6the voltage signal that dividing potential drop obtains compares with the benchmark in ARM controller, changes conducting and shutoff that ARM controller exports the Duty ratio control switching tube MOS2 of PWM ripple, reaches the object exporting voltage stabilizing.
Advantage applies of the present utility model is in the following aspects: (1) anti exciting converter has that circuit structure is simple, cost is low, easily realizes, and is suitable for very much the occasion of small-power many groups direct voltage output.(2) on the multiple-channel output of anti exciting converter, add lithium battery group charging circuit, effectively can solve powerup issue during civil power power-off in small-power occasion.(3) many groups winding of anti exciting converter is separate, more easily realizes anti exciting converter when lithium battery group is oppositely powered, and therefore also can realize the object exporting buck.(4) employ ARM and carry out Based Intelligent Control, intelligence can be realized and switch power supply circuits, export the continual function of power supply to reach.
Accompanying drawing explanation
Fig. 1 is whole Circuits System schematic diagram of the present utility model.
Fig. 2 carries out the simulation experiment result figure to control switching circuit.
Embodiment
Below with reference to accompanying drawing, content of the present utility model is described further.
The utility model is while other load supplying, set up a road lithium battery charging circuit, lithium cell charging is given by converter by civil power, when mains-supplied disconnects, control switch circuit switched realizes anti exciting converter by lithium battery group by the coupling between Transformer Winding and gives other circuit output power supply, to reach the continual function of multiple-channel output.
As shown in Figure 1, whole Circuits System comprises EMI filter circuit, current rectifying and wave filtering circuit, RCD absorption circuit, high frequency transformer, UC3845 drived control chip, lithium battery group charging circuit, light-coupled isolation sample circuit, sampling isolation circuit, TL431 sampling feedback circuit and ARM driving governor.
After input termination 220V electric main, after EMI filter circuit filtering High-frequency Interference, again through bridge rectifier and filtering, the direct voltage producing about 310V joins in the former limit inductance L of high frequency transformer, and former limit inductance is through a MOS1 switching tube and a sampling resistor R
4ground connection, the drive circuit that the grid of MOS1 switching tube is made up of drived control chip UC3845 and its peripheral circuit is opened and shutoff to control it, sampling resistor R
4for current signal is converted into voltage signal, and then reach the effect detecting electric current.At former limit inductance in parallel by electric capacity C
0, resistance R
0with diode D
0the RCD absorbing circuit of composition, in order to absorb peak voltage.The 310V direct voltage of rectification provides to drived control chip UC3845 the starting resistor being about 12V after resistance R step-down in addition.
1,3,6 of UC3845 drived control chip is connected with main circuit with 7 four pins, and other four pin are that the peripheral circuit of chip does not draw, and wherein 1 is the feedback signal terminal of light-coupled isolation, and 3 is that the test side access of circuital current detects resistance R
4on, 6 is the PWM wave output terminals controlling driven MOS 1 switching tube, and 7 is power access ends of chip, completes startup, afterwards by auxiliary induction L during startup by divider resistance R
0through D
5, C
4and C
5power after rectifying and wave-filtering.
The output winding of high frequency transformer has: secondary inductance L
1output voltage values is 3.5V-5V, and what this road adopted is opened loop control, reaches its magnitude of voltage exported by means of only the coupling between Transformer Winding.Secondary inductance L
2what export be burning voltage is 12V, and this road takes FEEDBACK CONTROL, and what adopt in mains-supplied situation is that light-coupled isolation controls, and sampling divider resistance is R
5and R
6, voltage dividing potential drop obtained is undertaken feeding back on drived control chip UC3845 by a reference source TL431 and optocoupler, and when civil power disconnects, its feedback divider resistance is R
5and R
6, the signal of feedback is supplied to ARM controller by light-coupled isolation.
Secondary inductance L
3exporting is then the charging circuit giving lithium battery group, during charging, switch S is closed, the situation that its life-span caused because overcharging to prevent lithium battery reduces or damages, the voltage of lithium battery is also fed back, the current voltage state of moment feedback lithium battery, once lithium battery is full of electricity, then ARM controller will cut-off switch S.Secondary inductance L
4composition lithium battery discharge circuit, only when civil power disconnects, lithium battery power supply forms anti exciting converter by the coupling controlling to open the light between pipe MOS2 and winding.
The overall work process of this Circuits System is: during mains-supplied, after EMI filter circuit and current rectifying and wave filtering circuit, direct voltage 310V is the input voltage of anti exciting converter, multiple-channel output is respectively V1:3.5V-5V, V2:12V and V3 tri-tunnel, by sampling V2 voltage, feed back to three-terminal voltage-stabilizing diode TL431 to be delivered on drived control chip UC3845 by light-coupled isolation, control its PWM ripple duty ratio exported and reach the object exporting voltage stabilizing.
ARM controller also can carry out control switch S by lithium battery group charged state, prevents from overcharging.When civil power disconnects, the signal that ARM controls to be returned by sampling judges that civil power disconnects, control switch S disconnects, and so exports by ARM controller the anti exciting converter that PWM ripple control switch pipe MOS2 realizes being powered by lithium battery group, is held by V2 output voltage by sampling resistor R
5and R
6feed back in ARM controller, by pid control algorithm, output voltage V2 is stablized, V1 also obtains output voltage.
Power-off switching controls is sampled by the line voltage of rectification by divider resistance, is supplied to ARM controller carries out civil power outage detection by the triggering signal of power-off decision circuitry generation isolation.
Whole Circuits System not only solves the problem of continuously power supply, achieves Based Intelligent Control, and in the circuit of oppositely power supply, be by the winding of high frequency transformer between coupling and reach anti exciting converter can the object that exports of buck.
In simulation software MMATLAB/Simulink, Circuits System is emulated, obtain simulation result as shown in Figure 2.Three curves are from top to bottom that V1, V2 and power switching control square wave respectively, and square wave high level is mains-supplied, and low level then switches to lithium battery group and powers.During emulation, what adopt is two 4.2V lithium battery series-feds, and that is supply power voltage is that 8.4V carries out oppositely power supply, as shown in the figure, in simulation process, carry out twice switching controls, can be found out by simulation result and substantially remain unchanged after output V1 and V2 before the handover.In addition, the ripple value recording 4.2V output is about 2.4%; The ripple value that 12V exports is about 0.4%.
Claims (5)
1. the Multiple Output Flyback Converter of a uninterrupted power supply, comprise EMI filter circuit, current rectifying and wave filtering circuit, RCD absorption circuit, high frequency transformer, UC3845 drived control chip, lithium battery group charging circuit, light-coupled isolation sample circuit, sampling isolation circuit, TL431 sampling feedback circuit and ARM driving governor, it is characterized in that:
1 pin of UC3845 drived control chip is connected with the feedback signal terminal of light-coupled isolation sample circuit, 3 pin with detect resistance R
4connection, the power access end that 6 pin are connected with the PWM wave output terminal of MOS1 switching tube, 7 pin are chip, complete startup by divider resistance R during startup, afterwards by auxiliary induction L
0through diode D
5, electrochemical capacitor C
4and C
5power after rectifying and wave-filtering;
High frequency transformer is by former limit inductance L, and auxiliary winding inductance is L
0with four secondary inductance L
1, L
2, L
3and L
4composition, the inductance L of auxiliary winding
0different name terminating diode D
5, then receive filter capacitor C in parallel
4with electrochemical capacitor C
5on, then receive on Same Name of Ends, Same Name of Ends ground connection;
The former limit inductance L of high frequency transformer is through a MOS1 switching tube and a sampling resistor R
4ground connection, the drive circuit that the grid of MOS1 switching tube is made up of UC3845 drived control chip and its peripheral circuit is opened and shutoff to control it, sampling resistor R
4for current signal is converted into voltage signal, and then reach the effect detecting electric current;
In parallel by electric capacity C in the inductance L of former limit
0, resistance R
0with diode D
0the RCD absorption circuit of composition, in order to absorb peak voltage;
Output is secondary inductance L
1, L
2, L
3and L
4the multiple-channel output of composition, secondary inductance L
1and L
2the load-carrying two-way of composition anti exciting converter exports, a route diode D
1, electric capacity C
1with resistance R
1composition, another route diode D
2, electric capacity C
2with resistance R
2composition;
TL431 sampling feedback circuit is connected with light-coupled isolation sample circuit, sampled signal is fed back to UC3845 chip.
2. the Multiple Output Flyback Converter of uninterrupted power supply as claimed in claim 1, is characterized in that: at secondary inductance L
3different name end accesses controllable switch S, for the switching of control circuit with protect over-charge of lithium battery.
3. the Multiple Output Flyback Converter of uninterrupted power supply as claimed in claim 1, is characterized in that: secondary inductance L
3composition lithium battery group charging circuit, during charging, switch S closes; Secondary inductance L
4composition lithium battery group discharge circuit, at L
4different name end on accessed MOS2 switching tube, receive on lithium battery group positive pole, lithium battery group negative pole receives L
4same Name of Ends on.
4. the Multiple Output Flyback Converter of uninterrupted power supply as claimed in claim 1, is characterized in that: TL431 sampling feedback circuit is by three-terminal voltage-stabilizing diode TL431, sampling resistor R
5and R
6, current-limiting resistance R
7, filter resistance R
8with filter capacitor C
7composition, obtains the sampled voltage of output V2.
5. the Multiple Output Flyback Converter of uninterrupted power supply as claimed in claim 1, it is characterized in that: ARM driving governor is connected with lithium battery group positive pole by overcharging testing circuit, commercial power rectification filtering voltage is connected with ARM controller by the output of sampling isolation circuit, for detecting civil power whether power-off, ARM by detection signal export pulsed drive control controllable switch S closed with turn off; By resistance R
5and R
6the voltage signal that dividing potential drop obtains compares with the benchmark in ARM controller, changes conducting and shutoff that ARM controller exports the Duty ratio control switching tube MOS2 of PWM ripple, reaches the object exporting voltage stabilizing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520518534.3U CN204794705U (en) | 2015-07-17 | 2015-07-17 | Multiplexed output flyback converter of uninterrupted power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520518534.3U CN204794705U (en) | 2015-07-17 | 2015-07-17 | Multiplexed output flyback converter of uninterrupted power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204794705U true CN204794705U (en) | 2015-11-18 |
Family
ID=54534678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520518534.3U Expired - Fee Related CN204794705U (en) | 2015-07-17 | 2015-07-17 | Multiplexed output flyback converter of uninterrupted power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204794705U (en) |
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| CN105871040A (en) * | 2016-05-18 | 2016-08-17 | 深圳宝砾微电子有限公司 | AC (alternating current)-DC (direct current) flyback charging circuit and charger |
| CN106253678A (en) * | 2016-08-26 | 2016-12-21 | 宁波三星医疗电气股份有限公司 | A kind of wide dynamic range switching power circuit of Multiple isolated outputs |
| CN106451750A (en) * | 2016-11-25 | 2017-02-22 | 上海电机学院 | Direct-current uninterruptible power supply |
| CN106532909A (en) * | 2016-10-19 | 2017-03-22 | 深圳市英威腾电源有限公司 | UPS (Uninterruptible Power Supply) cold-start circuit |
| CN106961212A (en) * | 2017-03-29 | 2017-07-18 | 华为技术有限公司 | A kind of voltage conversion device and its control method |
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| CN108631602A (en) * | 2018-05-23 | 2018-10-09 | 广东伊莱斯电机有限公司 | A kind of accessory power supply being used in three level NPC AC synchronous samplings |
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| CN112366952A (en) * | 2020-11-13 | 2021-02-12 | 深圳市必易微电子股份有限公司 | Isolated voltage conversion circuit, control circuit thereof and power supply method |
| CN112620842A (en) * | 2020-12-15 | 2021-04-09 | 南京理工大学 | Flyback pulse power supply for wire cut electrical discharge machining |
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| CN113783280A (en) * | 2021-07-21 | 2021-12-10 | 上海汉想新能源科技有限公司 | Lithium battery charging power supply suitable for 1500V photovoltaic system |
| CN113992021A (en) * | 2021-10-20 | 2022-01-28 | 广东电网有限责任公司 | Multi-voltage grade output device |
| TWI763527B (en) * | 2021-01-18 | 2022-05-01 | 大陸商昂寶電子（上海）有限公司 | Flyback converter power supply and control method thereof |
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| CN112366952B (en) * | 2020-11-13 | 2024-05-31 | 深圳市必易微电子股份有限公司 | Isolated voltage conversion circuit, control circuit thereof and power supply method |
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- 2015-07-17 CN CN201520518534.3U patent/CN204794705U/en not_active Expired - Fee Related
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| CN105871040A (en) * | 2016-05-18 | 2016-08-17 | 深圳宝砾微电子有限公司 | AC (alternating current)-DC (direct current) flyback charging circuit and charger |
| CN106253678A (en) * | 2016-08-26 | 2016-12-21 | 宁波三星医疗电气股份有限公司 | A kind of wide dynamic range switching power circuit of Multiple isolated outputs |
| CN106532909A (en) * | 2016-10-19 | 2017-03-22 | 深圳市英威腾电源有限公司 | UPS (Uninterruptible Power Supply) cold-start circuit |
| CN106451750A (en) * | 2016-11-25 | 2017-02-22 | 上海电机学院 | Direct-current uninterruptible power supply |
| CN106451750B (en) * | 2016-11-25 | 2019-03-08 | 上海电机学院 | A kind of DC UPS |
| CN106961212A (en) * | 2017-03-29 | 2017-07-18 | 华为技术有限公司 | A kind of voltage conversion device and its control method |
| CN107658941B (en) * | 2017-10-26 | 2024-06-11 | 国网江苏省电力公司南京供电公司 | Charging device of direct-current operation power supply of vehicle-mounted generator set |
| CN107658941A (en) * | 2017-10-26 | 2018-02-02 | 国网江苏省电力公司南京供电公司 | A kind of charging device of vehicle-based generator set direct current operative power source |
| CN108631602A (en) * | 2018-05-23 | 2018-10-09 | 广东伊莱斯电机有限公司 | A kind of accessory power supply being used in three level NPC AC synchronous samplings |
| CN108667308A (en) * | 2018-06-13 | 2018-10-16 | 广州金升阳科技有限公司 | A kind of micro-power isolated power supply and its control method for M-BUS power supplies |
| CN109066940A (en) * | 2018-09-18 | 2018-12-21 | 深圳和而泰智能控制股份有限公司 | A kind of charge control method, circuit, charger and electric tool |
| CN109756123A (en) * | 2019-03-26 | 2019-05-14 | 西安霍威电源有限公司 | A kind of multiple-channel output AC-battery power source module |
| CN112751488A (en) * | 2019-10-31 | 2021-05-04 | 安徽威灵汽车部件有限公司 | Power supply circuit, compressor assembly and electric vehicle |
| CN111194127A (en) * | 2019-12-31 | 2020-05-22 | 浙江大邦科技有限公司 | Wisdom street lamp monitored control system |
| CN112366952A (en) * | 2020-11-13 | 2021-02-12 | 深圳市必易微电子股份有限公司 | Isolated voltage conversion circuit, control circuit thereof and power supply method |
| CN112366952B (en) * | 2020-11-13 | 2024-05-31 | 深圳市必易微电子股份有限公司 | Isolated voltage conversion circuit, control circuit thereof and power supply method |
| CN112620842A (en) * | 2020-12-15 | 2021-04-09 | 南京理工大学 | Flyback pulse power supply for wire cut electrical discharge machining |
| CN112620842B (en) * | 2020-12-15 | 2022-06-28 | 南京理工大学 | Flyback pulse power supply for wire cut electrical discharge machining |
| TWI763527B (en) * | 2021-01-18 | 2022-05-01 | 大陸商昂寶電子（上海）有限公司 | Flyback converter power supply and control method thereof |
| CN113783280A (en) * | 2021-07-21 | 2021-12-10 | 上海汉想新能源科技有限公司 | Lithium battery charging power supply suitable for 1500V photovoltaic system |
| CN113992021A (en) * | 2021-10-20 | 2022-01-28 | 广东电网有限责任公司 | Multi-voltage grade output device |
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|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151118 Termination date: 20160717 |
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| CF01 | Termination of patent right due to non-payment of annual fee |