CN104467161B - A kind of power supply alternating current-direct current input-switching circuit and method - Google Patents
A kind of power supply alternating current-direct current input-switching circuit and method Download PDFInfo
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- CN104467161B CN104467161B CN201410517526.7A CN201410517526A CN104467161B CN 104467161 B CN104467161 B CN 104467161B CN 201410517526 A CN201410517526 A CN 201410517526A CN 104467161 B CN104467161 B CN 104467161B
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Abstract
The present invention relates to a kind of field of switch power technology, discloses a kind of power supply alternating current-direct current input-switching circuit and method.The circuit that this method uses includes：Voltage after the rectified bridge V1 of 220VAC is connected to 1,2 pin of optocoupler 3 by resistance R1, R2；4 pin of optocoupler meet peripheral circuit+12V, and 3 pin of optocoupler are extremely connected by resistance R4, R8 with triode G5, G9 B respectively, and triode G5 C poles are connected with 2 pin of resistance R6, metal-oxide-semiconductor driving chip 10, PWM1 drive signals outside resistance R6 another termination；Triode G9 C poles are connected with 4 pin of resistance R7, metal-oxide-semiconductor driving chip 10, and PWM2 signals outside resistance R7 another termination, two triode G5, G9 E is extremely connected to+12VG.The present invention has few using device, and simple and convenient, handoff response speed is fast, and reliability is high, is had a wide range of applications in alternating current-direct current input-switching circuit.
Description
Technical field
The present invention relates to a kind of field of switch power technology, more particularly to a kind of power supply alternating current-direct current input-switching circuit
And method.
Background technology
For most of Switching Power Supply, input voltage is mains 220VAC.But work as alternating current 220VAC
When there is exception or power system power failure, when some special electricity consumption occasions will also ensure that power supply has output, power supply just needs
Direct current supply.It is general to be realized using output redundancy, i.e., the mode of two sets circuits for such power supply.A set of normal civil power is defeated
Enter, another set of standby direct current input.But when how to make civil power without input, allow it to be switched to direct current input all the way automatically, or
When person's electric main is normal, direct current input is masked all the way.Such switching, it is necessary to take corresponding circuit to realize.
For it is above-mentioned the problem of, it is proposed that a kind of alternating current-direct current input-switching circuit.The circuit can be realized to work in civil power
When, power supply prioritizing selection civil power 220VAC.When city's electrical anomaly or mains failure, power supply automatically switches to DC power supply.
So that it is guaranteed that power supply has output always.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of power supply alternating current-direct current input-switching circuit and method, solve
The exchange input of power supply and direct current input switching problem.Circuit design is convenient, and reliability is high.
In order to realize the purpose for solving above-mentioned technical problem, present invention employs following technical scheme：
A kind of power supply alternating current-direct current input-switching circuit, peripheral main circuit are two-tube DC/DC change-over circuits, including：Periphery
Positive voltage terminal after circuit input 220VAC rectified bridge V1 is connected to one end of resistance 1, another resistance 2 that is terminated at of resistance 1
One end, another 1 pin for being terminated at optocoupler 3 of resistance 2,2 pin of optocoupler 3 connect the negative of the voltage after rectifier bridge V1.4 pin of optocoupler connect
Just, 3 pin of optocoupler 3 are connected to one end of resistance 4, one end of resistance 8, the other end of resistance 4 to peripheral circuit+12V accessory power supplys
The B poles of triode 5 are connected to, the C poles of triode 5 are connected to one end of resistance 6,2 pin of metal-oxide-semiconductor driving chip 10, resistance 6
PWM1 drive signals outside another termination, another B poles for being terminated at triode 9 of resistance 8, the C poles of triode 9 are connected to resistance 7
One end, 10 4 pin of metal-oxide-semiconductor driving chip, PWM2 signals outside another termination of resistance 7, the E of two triodes is extremely connected to
+12VG。
By using above-mentioned technical proposal, the present invention has following beneficial effect：
The present invention a kind of power supply alternating current-direct current input-switching circuit and method, solve power supply in AC dump or exception
When, the problem of being switched to direct current supply, circuit is simple, fast response time.
Brief description of the drawings
It is a kind of alternating current-direct current input-switching circuit connection diagram of the present invention in Fig. 1 dotted line frames, outer frame is major peripheral
Circuit.
Embodiment
This patent is further explained below in conjunction with the accompanying drawings.But the protection domain of this patent is not limited to specifically implement
Mode.
Embodiment 1
In Fig. 1, a kind of power supply alternating current-direct current input-switching circuit, peripheral main circuit is two-tube DC/DC change-over circuits, bag
Include：Positive voltage terminal after the rectified bridge V1 of peripheral circuit input 220VAC is connected to one end of resistance 1, and the another of resistance 1 is terminated at
One end of resistance 2, another 1 pin for being terminated at optocoupler 3 of resistance 2,2 pin of optocoupler 3 connect the negative of the voltage after rectifier bridge V1.Optocoupler
4 pin connecing peripheral circuit+12V accessory power supplys just, 3 pin of optocoupler 3 are connected to one end of resistance 4, one end of resistance 8, resistance 4
Another B poles for being terminated at triode 5, the C poles of triode 5 are connected to one end of resistance 6,2 pin of metal-oxide-semiconductor driving chip 10,
PWM1 drive signals outside another termination of resistance 6, another B poles for being terminated at triode 9 of resistance 8, the C poles of triode 9 connect
The PWM2 signals outside one end of resistance 7,10 4 pin of metal-oxide-semiconductor driving chip, another termination of resistance 7, the E of two triodes
Extremely it is connected to+12VG.
When civil power input is normal, the DC voltage after rectifier bridge V1, the 1 of optocoupler 3 is connected to by the partial pressure of resistance 1, resistance 2
Pin, the primary conducting of such optocoupler so that optocoupler normal work, and then cause triode 5, the B of triode 9 extremely to have voltage, this
Sample triode 5, triode 9 are at turning on SBR.Because outside PWM1, PWM2 signal is deposited always, two triodes are once
Conducting, PWM1, PWM2 are just dragged down by two triodes.Metal-oxide-semiconductor driving chip 10 is so allowed for not input, so it is not defeated
Go out, such DC/DC change-over circuits 2 do not have driving control signal, therefore DC/DC change-over circuits 2 do not work, DC/DC change-over circuits 1
Normal work.At this moment it is civil power as power input.
When civil power power down, because the defeated V1 rear ends of rectifier bridge are without output DC voltage, 1 pin of such optocoupler 3 enters without input
And make it that optocoupler is stopped, so, triode 5, the B poles no-voltage of triode 9, triode 5, triode 9 do not work, so as to
Outside PWM1, PWM2 signal can not be dragged down, so cause metal-oxide-semiconductor driving chip 10 have input, so just have accordingly
The control signal of PWM11, PWM21 two, such normal work of DC/DC change-over circuits 2, at this moment it is input of the DC inputs as power supply.
It was found from above-mentioned analysis, as long as civil power is present, optocoupler 3 just has input, and then optocoupler normal work.Such triode
5th, triode 9 turns on so that drive signal PWM1, PWM2 for not amplifying of DC/DC change-over circuits 2 are by low without working.And then
Realize the switching of alternating current-direct current input.
The circuit is few using device, and simple and convenient, handoff response speed is fast, and reliability is high, and switching electricity is inputted in alternating current-direct current
Had a wide range of applications in road.
Claims (1)
1. a kind of power supply switching method of AC DC input-switching circuit, a kind of power supply of use is inputted with alternating current-direct current to be switched
Circuit, it is connected with for the peripheral circuit of two-tube DC/DC change-over circuits, including：After the rectified bridge V1 of peripheral circuit input 220VAC
Positive voltage terminal be connected to resistance R1 one end, resistance R1 another one end for being terminated at resistance R2, the another of resistance R2 is terminated at
1 pin of optocoupler 3,2 pin of optocoupler 3 connect the negative terminal of the voltage after rectifier bridge V1；4 pin of optocoupler connect peripheral circuit+12V accessory power supplys
Anode, 3 pin of optocoupler 3 are connected to resistance R4 one end, resistance R8 one end, resistance R4 another B for being terminated at triode G5
Pole, triode G5 C poles are connected to resistance R6 one end, 2 pin of metal-oxide-semiconductor driving chip 10, outside resistance R6 another termination
PWM1 drive signals, resistance R8 another B poles for being terminated at triode G9, triode G9 C poles be connected to resistance R7 one end,
4 pin of metal-oxide-semiconductor driving chip 10, PWM2 signals outside resistance R7 another termination, two triode G5, G9 E is extremely connected to+
12VG；It is characterized in that：
1）When civil power input is normal, the DC voltage after rectifier bridge V1, the 1 of optocoupler 3 is connected to by resistance R1, resistance R2 partial pressure
Pin, the primary conducting of such optocoupler so that optocoupler normal work, and then cause triode G5, triode G9 B extremely to have voltage,
So triode G5, triode G9 are at turning on SBR；
When outside PWM1, PWM2 signal is deposited always, two triodes are once turn on, and PWM1, PWM2 are just dragged down by two triodes, so
Metal-oxide-semiconductor driving chip 10 is allowed for not input, so without exporting, such DC/DC change-over circuits 2 are believed without drive control
Number, therefore DC/DC change-over circuits 2 do not work, the normal work of DC/DC change-over circuits 1, are at this moment civil powers as power input；
2）When civil power power down, due to the defeated V1 rear ends of rectifier bridge without output DC voltage, 1 pin of such optocoupler 3 without input, and then
So that optocoupler 3 is stopped, so, triode G5, triode G9 B poles no-voltage, triode G5, triode G9 do not work,
So as to which outside PWM1, PWM2 signal can not be dragged down, and then cause metal-oxide-semiconductor driving chip 10 to have input, so just have accordingly
The control signal of PWM11, PWM21 two, such normal work of DC/DC change-over circuits 2, at this moment it is input of the DC inputs as power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410517526.7A CN104467161B (en) | 2014-09-30 | 2014-09-30 | A kind of power supply alternating current-direct current input-switching circuit and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410517526.7A CN104467161B (en) | 2014-09-30 | 2014-09-30 | A kind of power supply alternating current-direct current input-switching circuit and method |
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| Publication Number | Publication Date |
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| CN104467161A CN104467161A (en) | 2015-03-25 |
| CN104467161B true CN104467161B (en) | 2017-12-01 |
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| CN110260499B (en) * | 2019-06-13 | 2020-12-25 | 珠海格力电器股份有限公司 | Alternating current signal acquisition device, air conditioner and alternating current signal acquisition method of air conditioner |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202634259U (en) * | 2012-05-17 | 2012-12-26 | 佛山市顺德区瑞德电子实业有限公司 | Alternating current and direct current dual-purposed power supply control circuit |
| CN203761250U (en) * | 2013-11-26 | 2014-08-06 | 洛阳隆盛科技有限责任公司 | Power square wave generation circuit with adjustable pulse width |
| CN204167996U (en) * | 2014-09-30 | 2015-02-18 | 洛阳隆盛科技有限责任公司 | A kind of power supply alternating current-direct current input-switching circuit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100627704B1 (en) * | 2004-09-22 | 2006-09-25 | 삼성전자주식회사 | Discharge lamp driving circuit having detection function of lamp current and voltage on a secondary side of a transformer, and method of driving the discharge lamp |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202634259U (en) * | 2012-05-17 | 2012-12-26 | 佛山市顺德区瑞德电子实业有限公司 | Alternating current and direct current dual-purposed power supply control circuit |
| CN203761250U (en) * | 2013-11-26 | 2014-08-06 | 洛阳隆盛科技有限责任公司 | Power square wave generation circuit with adjustable pulse width |
| CN204167996U (en) * | 2014-09-30 | 2015-02-18 | 洛阳隆盛科技有限责任公司 | A kind of power supply alternating current-direct current input-switching circuit |
Non-Patent Citations (1)
| Title |
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| 智能交直流电压数据采集系统的设计;胡仕兵等;《测控技术与仪器仪表》;20140831;第40卷(第8期);第83-86页 * |
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