CN205847076U - AC D/C power - Google Patents
AC D/C power Download PDFInfo
- Publication number
- CN205847076U CN205847076U CN201620672457.1U CN201620672457U CN205847076U CN 205847076 U CN205847076 U CN 205847076U CN 201620672457 U CN201620672457 U CN 201620672457U CN 205847076 U CN205847076 U CN 205847076U
- Authority
- CN
- China
- Prior art keywords
- coupled
- outfan
- resistance
- input
- power supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The utility model discloses a kind of AC D/C power, including: a switching switch, there is two groups of inputs and one group of outfan；One AC/DC transducer, has input and outfan, the input input AC voltage of main AC/DC transducer, is coupled to the one of which input of switching switch；One DC source, has charging end and outfan, and the charging end of DC source is coupled to the outfan of AC/DC transducer, and the outfan of DC source is coupled to another group input of switching switch；One output detection circuit, is coupled to the outfan of switching switch, is used for detection the most abnormal to the electric current of load output, and output detects signal accordingly；One control circuit, in response to detection signal to control switching switch motion；And a hand switch, there is one group of input and one group of outfan, the input of hand switch is coupled to the outfan of AC/DC transducer, and the outfan of hand switch is coupled to the outfan of switching switch.
Description
Technical field
This utility model relates to a kind of power supply, more specifically, it relates to a kind of AC-DC power supply.
Background technology
AC-DC power supply is to be exclusively used in alternating voltage is converted to DC voltage, the power-supply device used for load.In reality
During border uses, if the load received on AC-DC power supply itself exists fault, or the both positive and negative polarity of load connects instead, and this can be directly
Cause, when load switches on power, not only loading and self there will be bigger accident, as cross flow problem to AC-DC power supply
Damage, make AC-DC power supply to be continuing with.
Utility model content
The deficiency existed for prior art, the purpose of this utility model is to provide one to have and can bear once
After the damage being subject to because of load faulty, the AC-DC power supply being continuing with.
For achieving the above object, this utility model provides following technical scheme:
A kind of AC-DC power supply, including:
One switching switch, has two groups of inputs and one group of outfan；
One AC/DC transducer, has input and outfan, the input input AC voltage of described main AC/DC transducer,
It is coupled to the one of which input of switching switch；
One DC source, has charging end and outfan, and the charging end of described DC source is coupled to AC/DC transducer
Outfan, the outfan of described DC source is coupled to another group input of switching switch；
One output detection circuit, is coupled to the outfan of switching switch, the most different to the electric current of load output for detection
Often, and export detect signal accordingly；
One control circuit, in response to described detection signal to control described switching switch motion；
And a hand switch, there is one group of input and one group of outfan, the input of described hand switch is coupled to
The outfan of AC/DC transducer, the outfan of described hand switch is coupled to the outfan of switching switch.
By above technical scheme, when original state, switching switch is switched to connect with DC source, and then by direct current
Power supply is to load supplying, if there is fault so that output current anomaly, and control circuit does not the most control to switch switch motion, continues
Continue and powered by secondary DC source, even if DC source is destroyed, also AC/DC transducer will not be impacted, and by control
Hand switch processed so that AC/DC transducer can continue to use.If there is no fault, i.e. DC source output electric current without
Abnormal, control circuit can control to switch switch motion, and then is switched to be powered by AC/DC transducer.Therefore, DC source can be adopted
Using lower-cost type, even if being destroyed, losing the least.
Preferably, described output detection circuit includes:
Current detecting unit, for the detection size of current to load output, and exports corresponding current detection value；
Comparing unit, for described current detection value and a reference value being compared, and exports phase according to comparative result
The fiducial value answered.
By above technical scheme, when current detection value exceedes reference value, i.e. represent output current anomaly, now compare
Unit output represents the fiducial value of exception, when current detection value is less than reference value, i.e. represents output electric current normal, now compares
Unit output represents normal fiducial value；Then control circuit controls to switch switch motion according to this fiducial value.
Preferably, described output detection circuit also includes the judging unit being coupled between comparing unit and control circuit,
Described judging unit is used for detecting the most described fiducial value changes, and sentences accordingly according to testing result output
Disconnected value.
By above technical scheme, it is contemplated that be supported on when being just switched on, break down the most immediately, therefore, logical
Cross such scheme, it is possible to give its certain buffer time, only after the scheduled time is connected in load, still to occur without fault, sentence
Disconnected unit just can export and represent normal judgment value, then control circuit controls to switch switch motion according to this judgment value.
Preferably, described judging unit includes:
One Time-delayed trigger electrical equipment, has triggering end and an outfan；
One NPN audion, one emitter stage is coupled to the triggering end of time-delay trigger, and colelctor electrode is coupled to VCC voltage, base
Pole is coupled to the outfan of comparing unit.
By above technical scheme, when fiducial value is high level, when i.e. output electric current is normal, NPN triode ON so that
The triggering end of time-delay trigger obtains electric triggering, at the delay stage of time-delay trigger, if fiducial value does not change low level, the most defeated
Go out electric current and remain normally, then time-delay trigger, after time delay terminates, exports the judgment value of high level；If fiducial value becomes
Low level, then time-delay trigger dead electricity resets, it is judged that value then remains low level.
Preferably, described judging unit includes:
One chronotron, its input is coupled to the outfan of comparing unit；
One AND circuit, has two inputs and an outfan, one of them input coupling of described AND circuit
Being connected to the outfan of comparing unit, another input is coupled to the outfan of chronotron.
By above technical scheme, when fiducial value is high level, when i.e. output electric current is normal, on the one hand it is input to and door electricity
One input on road, is on the other hand input to another input of AND circuit after chronotron time delay a period of time again,
In the delay stage of chronotron, if fiducial value is not changed to low level, then after time delay, two of AND circuit defeated
Enter end and all receive high level, and then the judgment value of output high level；Otherwise, if in delay stage, fiducial value becomes low
Level, the then judgment value of AND circuit output low level.
Preferably, described current detecting unit includes:
One first resistance, its one end is coupled to the outfan of switching switch, its other end ground connection；
One second resistance, its one end is coupled to this one end of the first resistance；
One first electric capacity, its one end is coupled to the other end of the second resistance, its other end ground connection.
By above technical scheme, the first electric capacity produces current detection value.
Preferably, described comparing unit includes:
One first resistance, its one end is coupled to VCC voltage；
One second resistance, its one end is coupled to the other end of the first resistance, its other end ground connection；
One comparator, its in-phase end is coupled to the first resistance and the junction point of the second resistance, and its end of oppisite phase is coupled to electric current
The outfan of detector unit.
By above technical scheme, produce described reference value from the junction point of the first resistance and the second resistance；When electric current is examined
When measured value is more than reference value, the fiducial value of comparator output low level；Otherwise, the fiducial value of comparator output high level.
Preferably, described switching switch uses relay.
By above technical scheme, control circuit obtains electric/dead electricity by controlling relay coil, controls touching of relay
Point switch motion, reaches the purpose of switching.
Preferably, described control circuit includes:
One first resistance, its one end is coupled to the outfan of described comparing unit；
One first audion, its grounded emitter, base stage is coupled to the other end of the first resistance, colelctor electrode and relay
VCC voltage it is coupled to after coils connected in series；
One second resistance, its one end is coupled to the base stage of the first audion, and the other end is coupled to the transmitting of the first audion
Pole；
One first diode, itself and the coil inverse parallel of relay.
By above technical scheme, when detection signal is high level, and i.e. representative output electric current is normal, the first audion is led
Logical so that the coil of relay obtains electric, its contact switch action, it is achieved switching；When detecting signal and being low level, relay is not
Action.
Preferably, also include that protection circuit, described protection circuit have an outfan being simultaneously coupled to switching switch
Protection switch, described protection circuit controls described protection on/off in response to described detection signal.
By above technical scheme, when detecting signal representative output electric current and being abnormal, protection circuit controls protection switch
Disconnect, DC source is disconnected with load, thus DC source is protected.
Accompanying drawing explanation
Fig. 1 is the integrated circuit structure chart of AC-DC power supply；
Fig. 2 is the circuit diagram of output detection circuit in embodiment 1；
Fig. 3 is the circuit diagram of control circuit in embodiment 1；
Fig. 4 is the circuit diagram of protection circuit in embodiment 1；
Fig. 5 is the circuit diagram of mu balanced circuit in embodiment 1；
Fig. 6 is the circuit diagram of judging unit in embodiment 2.
Reference: 100, AC/DC transducer；200, DC source；300, output detection circuit；310, current detecting list
Unit；320, comparing unit；330, judging unit；400, control circuit；500, protection circuit；600, mu balanced circuit.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but reality of the present utility model
The mode of executing is not limited only to this.
Embodiment 1:
A kind of AC-DC power supply as shown in Figure 1, it includes an AC/DC transducer 100 and a DC source 200；
The input of AC/DC transducer 100 is coupled on AC input interface J1, is used for inputting AC voltage.DC source 200 includes charge and discharge
Electric control circuit 400 and battery, the power input of charge-discharge control circuit 400 is coupled to the outfan of AC/DC transducer 100
(positive pole), charging end couples with battery, and discharge end couples with one group of armature contact of relay K 1.When AC/DC transducer 100 work
When making, it is possible to by charge-discharge control circuit 400, battery is charged.
The outfan of AC/DC transducer 100 couples with another group armature contact of relay K 1, and the fixing of relay K 1 touches
Point is coupled in the fixed contact of relay K 2, and relay K 2 is closed type, and its armature contact couples with DC output interface J2.Continue
Electrical equipment K1 not electric time, its contact switch switches on the armature contact that couples with DC source 200, and then by DC source
200 export DC voltage to DC output interface J2.
Hand switch S1 is in parallel with relay K 1, and its one end is coupled in the fixed contact of relay K 1, and the other end couples
On the outfan of AC/DC transducer 100.When hand switch S1 closes, by AC/DC transducer 100 to DC output interface J2
Output DC voltage.
Output detection circuit 300 has a detection port, and this detection port is coupled to the fixed contact of relay K 1, with
The DC source 200 current value to load output is detected when initial.
With reference to Fig. 2, output detection circuit 300 includes current detecting unit 310, comparing unit 320 and judging unit 330.
Wherein, current detecting unit 310 includes resistance R1, resistance R2 and electric capacity C1, and one end of resistance R1 is coupled to consolidating of relay K 1
Fixed contact, other end ground connection；One end of resistance R2 is coupled to this one end of resistance R1, and the other end is coupled to one end of electric capacity C1,
The other end ground connection of electric capacity C2.Comparing unit 320 includes resistance R3, resistance R4 and comparator U1, and one end of resistance R3 couples
In VCC voltage, the other end connect with resistance R4 after ground connection, and then produce reference value at the junction point of resistance R3 and resistance R4；Ratio
The relatively in-phase end of device U1 is coupled to the junction point of resistance R3 and resistance R4, and to receive reference value, its end of oppisite phase is coupled to electric capacity C1,
To receive current detection value.Judging unit 330 includes Time-delayed trigger electrical equipment U2 and NPN audion Q1, Time-delayed trigger electrical equipment U2 by
555 intervalometers are constituted, and it triggers when powering on, and export high level signal after time delay；The emitter stage coupling of NPN audion Q1
Being connected to the triggering end of time-delay trigger U2, colelctor electrode is coupled to VCC voltage, and base stage is coupled to the outfan of comparator U1.
With reference to Fig. 3, control circuit 400 includes resistance R7, resistance R6, NPN audion Q2 and diode D1；NPN tri-pole
The base stage of pipe Q2 is coupled to the coil of the outfan of comparator U1, grounded emitter, colelctor electrode and relay K 1 by resistance R6
VCC voltage it is coupled to after series connection；One end of resistance R7 is coupled to the base stage of NPN audion Q2, and the other end is coupled to NPN audion
The emitter stage of Q2；Diode D1 and the coil inverse parallel of relay K 1.
With reference to Fig. 4, protection circuit 500 includes phase inverter N1, resistance R8, resistance R9, NPN audion Q3 and diode
D2；The input of phase inverter N1 is coupled to the outfan of comparator U1, and outfan is coupled to NPN audion Q3's by resistance R8
Base stage；One end of resistance R9 is coupled to the base stage of NPN audion Q3, and the other end is coupled to the emitter stage of NPN audion Q3；NPN
The colelctor electrode of audion Q3 is coupled to VCC voltage after the coils connected in series of relay K 2；Diode D2 and the coil of relay K 2
Inverse parallel.
With reference to Fig. 5, the VCC voltage in the present embodiment, mu balanced circuit 600 providing, the input of mu balanced circuit 600 couples
In AC/DC transducer 100 and the outfan of DC source 200.
Embodiment 2:
The present embodiment is identical with embodiment 1 benchmark, and difference is that judging unit 330 have employed different circuit knots
Structure, specifically:
With reference to Fig. 2,6, it is judged that unit 330 includes chronotron and AND circuit N2；Chronotron can be even number by some numbers
Phase inverter be sequentially connected with composition, its input is coupled to the outfan of comparator U1；AND circuit N2 has two inputs
With an outfan, one of them input is coupled to the outfan of comparator U1, and another input is coupled to chronotron
Outfan.
Claims (10)
1. an AC-DC power supply, is characterized in that, including:
One switching switch, has two groups of inputs and one group of outfan；
One AC/DC transducer, has input and outfan, the input input AC voltage of described main AC/DC transducer, couples
One of which input in switching switch；
One DC source, has charging end and outfan, and the charging end of described DC source is coupled to the output of AC/DC transducer
End, the outfan of described DC source is coupled to another group input of switching switch；
One output detection circuit, is coupled to the outfan of switching switch, the most abnormal to the electric current of load output for detection, and
Output detects signal accordingly；
One control circuit, in response to described detection signal to control described switching switch motion；
And a hand switch, there is one group of input and one group of outfan, the input of described hand switch is coupled to AC/DC
The outfan of transducer, the outfan of described hand switch is coupled to the outfan of switching switch.
AC-DC power supply the most according to claim 1, is characterized in that, described output detection circuit includes:
Current detecting unit, for the detection size of current to load output, and exports corresponding current detection value；
Comparing unit is for comparing described current detection value and a reference value and corresponding according to comparative result output
Fiducial value.
AC-DC power supply the most according to claim 2, is characterized in that, described output detection circuit also includes being coupled to compare
Judging unit between unit and control circuit, described judging unit is used for detecting the most described fiducial value becomes
Change, and export corresponding judgment value according to testing result.
AC-DC power supply the most according to claim 3, is characterized in that, described judging unit includes:
One Time-delayed trigger electrical equipment, has triggering end and an outfan；
One NPN audion, one emitter stage is coupled to the triggering end of time-delay trigger, and colelctor electrode is coupled to VCC voltage, base stage coupling
It is connected to the outfan of comparing unit.
AC-DC power supply the most according to claim 3, is characterized in that, described judging unit includes:
One chronotron, its input is coupled to the outfan of comparing unit；
One AND circuit, has two inputs and an outfan, and one of them input of described AND circuit is coupled to
The outfan of comparing unit, another input is coupled to the outfan of chronotron.
AC-DC power supply the most according to claim 2, is characterized in that, described current detecting unit includes:
One first resistance, its one end is coupled to the outfan of switching switch, its other end ground connection；
One second resistance, its one end is coupled to this one end of the first resistance；
One first electric capacity, its one end is coupled to the other end of the second resistance, its other end ground connection.
AC-DC power supply the most according to claim 2, is characterized in that, described comparing unit includes:
One first resistance, its one end is coupled to VCC voltage；
One second resistance, its one end is coupled to the other end of the first resistance, its other end ground connection；
One comparator, its in-phase end is coupled to the first resistance and the junction point of the second resistance, and its end of oppisite phase is coupled to current detecting
The outfan of unit.
AC-DC power supply the most according to claim 1, is characterized in that, described switching switch uses relay.
AC-DC power supply the most according to claim 8, is characterized in that, described control circuit includes:
One first resistance, its one end is coupled to the outfan of described comparing unit；
One first audion, its grounded emitter, base stage is coupled to the coil of the other end of the first resistance, colelctor electrode and relay
VCC voltage it is coupled to after series connection；
One second resistance, its one end is coupled to the base stage of the first audion, and the other end is coupled to the emitter stage of the first audion；
One first diode, itself and the coil inverse parallel of relay.
AC-DC power supply the most according to claim 1, is characterized in that, also includes that protection circuit, described protection circuit have
The protection switch of one outfan being simultaneously coupled to switching switch, described protection circuit controls described in response to described detection signal
Protection on/off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620672457.1U CN205847076U (en) | 2016-06-29 | 2016-06-29 | AC D/C power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620672457.1U CN205847076U (en) | 2016-06-29 | 2016-06-29 | AC D/C power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205847076U true CN205847076U (en) | 2016-12-28 |
Family
ID=57621671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620672457.1U Active CN205847076U (en) | 2016-06-29 | 2016-06-29 | AC D/C power |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205847076U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109950881A (en) * | 2019-03-29 | 2019-06-28 | 成都信息工程大学 | A kind of embeddable type equipment preliminary examination protection circuit |
| CN110890072A (en) * | 2019-12-04 | 2020-03-17 | 中山大学 | Self-powered electronic paper drive circuit and electronic paper display equipment |
| CN116647028A (en) * | 2023-05-23 | 2023-08-25 | 小米汽车科技有限公司 | Switching power supply control circuit, vehicle-mounted system and vehicle |
| CN116647028B (en) * | 2023-05-23 | 2024-04-26 | 小米汽车科技有限公司 | Switching power supply control circuit, vehicle-mounted system and vehicle |
-
2016
- 2016-06-29 CN CN201620672457.1U patent/CN205847076U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109950881A (en) * | 2019-03-29 | 2019-06-28 | 成都信息工程大学 | A kind of embeddable type equipment preliminary examination protection circuit |
| CN109950881B (en) * | 2019-03-29 | 2024-04-09 | 成都信息工程大学 | Embedded equipment pre-detection protection circuit |
| CN110890072A (en) * | 2019-12-04 | 2020-03-17 | 中山大学 | Self-powered electronic paper drive circuit and electronic paper display equipment |
| CN116647028A (en) * | 2023-05-23 | 2023-08-25 | 小米汽车科技有限公司 | Switching power supply control circuit, vehicle-mounted system and vehicle |
| CN116647028B (en) * | 2023-05-23 | 2024-04-26 | 小米汽车科技有限公司 | Switching power supply control circuit, vehicle-mounted system and vehicle |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9906014B2 (en) | Circuit protection device with automatic fault monitoring and detection function | |
| CN108909494B (en) | Charging system and electric automobile | |
| CN103545911B (en) | A kind of uninterruptible power system of dual input intelligent power supply | |
| CN203859558U (en) | Electronic equipment and external charging circuit thereof | |
| CN103490374B (en) | Mass production test device and short-circuit current foldback circuit thereof | |
| JPWO2014027512A1 (en) | Power supply | |
| CN105896469B (en) | A kind of circuit protection device of automatic monitoring operation troubles | |
| CN103178595A (en) | Mobile phone adapter | |
| CN106771997A (en) | A kind of energy-storage system contactor adhesion detection means | |
| CN205847076U (en) | AC D/C power | |
| CN103326635A (en) | Direct current motor braking circuit | |
| CN206460147U (en) | Contacts status on-line real-time measuremen circuit in a kind of high tension loop | |
| CN203406658U (en) | Storage battery detection device of direct current system | |
| CN102608371B (en) | Storage battery detecting device and undervoltage protection method thereof | |
| CN101136547A (en) | Short circuit protection circuit of DC power supply | |
| CN104577968A (en) | Three-phase overvoltage, under-voltage and default phase integrated protection circuit | |
| CN105259516B (en) | A kind of off-line UPS input switch abnormal detector | |
| CN104242252A (en) | Battery over-discharge protecting circuit | |
| CN104600763A (en) | Under-voltage protection circuit and lamp | |
| CN101873032A (en) | Power supply switching device and method thereof, power supply system and medical device | |
| CN207557400U (en) | A kind of low voltage failure circuit investigates instrument | |
| CN206178103U (en) | Energy storage system contactor adhesion detection device | |
| CN103219790B (en) | Double-power supply system and double-power controller | |
| CN205847121U (en) | AC D/C power | |
| CN105322499B (en) | A kind of short-circuit protection circuit abnormal based on power source loads |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |