CN207743742U - A kind of charge protection power supply - Google Patents
A kind of charge protection power supply Download PDFInfo
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- CN207743742U CN207743742U CN201721726449.1U CN201721726449U CN207743742U CN 207743742 U CN207743742 U CN 207743742U CN 201721726449 U CN201721726449 U CN 201721726449U CN 207743742 U CN207743742 U CN 207743742U
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Abstract
The utility model discloses a kind of charge protection power supplys, it is characterised in that：Including transforming circuit, the protection control circuit being connected with transforming circuit, and respectively with transforming circuit and the filter circuit of pressure-stabilizing that is connected of protection control circuit；The protection control circuit controls the conducting and cut-off of filter circuit of pressure-stabilizing according to the size of voltage.The utility model is provided with protection control circuit, the on and off which controls filter circuit of pressure-stabilizing by detecting the voltage swing flowed through, to realize in charging process to the overvoltage protection of electronic product.The utility model is provided with overvoltage crowbar, circuit can be protected not to be damaged when instantaneous high pressure occurs in alternating current by the effect of overvoltage crowbar.
Description
Technical field
The utility model is related to a kind of power supply, in particular to a kind of charge protection power supplys.
Background technology
With the continuous development of electronic technology, portable electronic product increasingly has been favored by people.Portable electric
The maximum feature of sub- product is that external power supply can be detached within certain time, is only relying on its internal independence energy supplying system just
Often work, to realize the function that can move freely job site at any time.Therefore, it is that its internal cell fills using external power supply
Electricity becomes one very crucial sport technique segment of portable electronic system.In the conventional technology, the use of external power supply is just
When taking the charging of formula electronic product, it will usually voltage protection be set, electronic product is damaged to prevent voltage fluctuation.However, traditional
Power supply to carry out overvoltage protection to circuit merely by setting fuse, fuse is then when instantaneous high pressure occurs in circuit
Fusing, but circuit and electronic product can not then be carried out when voltage fluctuates, and does not reach fuse blows voltage
Protection, cannot be satisfied demand.
Utility model content
The purpose of the utility model is to overcome the portable electronic product above problems existing in charging, provide one
Kind charge protection power supply.
The purpose of this utility model is achieved through the following technical solutions：A kind of charge protection power supply, including transforming circuit, with
The protection control circuit that transforming circuit is connected, and respectively with transforming circuit and the voltage regulation filtering that is connected of protection control circuit
Circuit；The protection control circuit controls the conducting and cut-off of filter circuit of pressure-stabilizing according to the size of voltage.
Further, the protection control circuit includes triode Q1, and the poles relay LS1, P are connected with transforming circuit, N
The zener diode pole D2, P that pole is connected after resistance R5 with the emitter of triode Q1 is connected with the collector of triode Q1
It connects, the diode D3 that the poles N are connected with transforming circuit, one end is connected with the poles P of zener diode D2, the other end is sequentially through electricity
The resistance R3 being connected with the poles N of diode D3 after the device R2 and resistance R1 of position, is serially connected in the poles N and the diode of zener diode D2
Resistance R4 between the poles N of D3, one end is connected with the poles N of diode D3, the other end after indicator light D4 with relay LS1's
The resistance R6 of 1 end connection；The base stage of the triode Q1 connect with the control terminal of potentiometer R2, its collector and relay LS1
2 ends be connected；3 ends of the relay LS1 are connect with filter circuit of pressure-stabilizing, its 4 end is then connect with transforming circuit, its 5 end
For empty foot.
The transforming circuit includes transformer T, and the poles P are connected with the Same Name of Ends of the secondary inductance coil L1 of transformer T, N
The diode D1 that pole is connected with the poles N of diode D3, anode is connected with the poles N of diode D1, cathode and zener diode
The polar capacitor C1 that the poles P of D2 are connected；The non-same polarity of the secondary inductance coil L1 of the transformer T and zener diode D2
The connection of the poles P while be grounded, the Same Name of Ends of secondary inductance coil L2 of the transformer T connect with 4 ends of relay LS1,
Its non-same polarity is then connected with filter circuit of pressure-stabilizing, and the primary side inductance coil of the transformer T connects alternating current.
The filter circuit of pressure-stabilizing includes diode rectifier U1, three terminal regulator U2, and anode is with three terminal regulator U2's
The polar capacitor C2 being grounded while VIN pins are connected, cathode is connected with the GND pins of three terminal regulator U2, anode with
The polar capacitor C3, Yi Jiyu that the VOUT pins of three terminal regulator U2 are connected, cathode is connected with the cathode of polar capacitor C2
The capacitance C4 that polar capacitor C3 is in parallel；An input terminal of the diode rectifier U1 connect with 3 ends of relay LS1, is another
One input terminal is connect with the non-same polarity of the secondary inductance coil L2 of transformer T；The VIN pins and two of the three terminal regulator U2
2 feet of pole pipe rectifier U1 connect, and GND pins are then connect with 1 foot of diode rectifier U1；The three terminal regulator U2's
VOUT pins form output end.
The primary side of the transformer T is also associated with overvoltage crowbar；The overvoltage crowbar includes being serially connected in transformation
Varistor RT between the Same Name of Ends and non-same polarity of the primary side inductance coil of device T, the primary side inductor wire of one end and transformer T
The non-same polarity connection of circle, the primary side inductance coil of the other end and transformer T Same Name of Ends the fuse of input terminal is collectively formed
F1。
The utility model compared with the prior art, has the following advantages and advantageous effect：
(1) the utility model is provided with protection control circuit, and the protection control circuit is by detecting the voltage swing flowed through
The on and off of filter circuit of pressure-stabilizing is controlled, to realize in charging process to the overvoltage protection of electronic product.
(2) the utility model is provided with overvoltage crowbar, can occur in alternating current by the effect of overvoltage crowbar
Circuit is protected not to be damaged when instantaneous high pressure.
Description of the drawings
Fig. 1 is the overall structure diagram of the utility model.
Specific implementation mode
The utility model is described in further detail with reference to embodiment, but the embodiment of the utility model is simultaneously
It is without being limited thereto.
Embodiment
As shown in Figure 1, the charge protection power supply of the utility model, including transforming circuit, the guarantor being connected with transforming circuit
Control circuit is protected, and the filter circuit of pressure-stabilizing being connected respectively with transforming circuit and protection control circuit.Protection control electricity
Road can control the conducting and cut-off of filter circuit of pressure-stabilizing according to the size of the voltage flowed through, and when overtension, then cut-off is steady
Press filtration wave circuit, to protect electronic product；Filter circuit of pressure-stabilizing is then connected when voltage is normal, to be carried out to electronic product
Charging.
Specifically, the protection control circuit includes resistance R1, and potentiometer R2, resistance R3, resistance R4, resistance R5, resistance R6,
Triode Q1, relay LS1, zener diode D2, diode D3 and indicator light D4.
Wherein, the poles P of zener diode D2 be connected with transforming circuit, hair of the poles N after resistance R5 with triode Q1
Emitter-base bandgap grading is connected.The poles P of diode D3 are connected with the collector of triode Q1, the poles N are connected with transforming circuit.Resistance R3's
One end is connected with the poles P of zener diode D2, the other end sequentially after potentiometer R2 and resistance R1 with the poles the N phase of diode D3
Connection.Resistance R4 is serially connected between the poles N of zener diode D2 and the poles N of diode D3.One end of resistance R6 and diode D3
The poles N be connected, the other end is connect after indicator light D4 with 1 end of relay LS1.The base stage and potentiometer of the triode Q1
The control terminal connection of R2, its collector are connected with 2 ends of relay LS1.3 ends of the relay LS1 and voltage regulation filtering electricity
Road connection, its 4 end are then connect with transforming circuit, its 5 end is empty foot.
In said structure, a bleeder circuit, partial pressure electricity is collectively formed in resistance R1, potentiometer R2 and resistance R3
Road can be such that the base voltage of triode Q1 rises, and the base voltage of triode Q1 can be adjusted by adjusting potentiometer R2.
In the present embodiment, the resistance value of resistance R1 is 150 Ω, and the resistance value of potentiometer R2 is 270 Ω, and the resistance value of resistance R3 is 1K Ω, electricity
The resistance value for hindering R4 is 2K Ω, and the resistance value of resistance R5 is 5.1 Ω, and the resistance value of resistance R6 is 1K Ω, and the model of diode D3 can adopt
It is 3DG with 1N4001, the model 1N4741 of zener diode D2, triode Q1.
When the voltage of transforming circuit output is normal, 3 ends of relay LS1 are attracted with its 4 end, and filter circuit of pressure-stabilizing is connected simultaneously
12V voltages are exported, electronic product charges normal.When circuit voltage fluctuates, and lead to the base stage and emitter of triode Q1
Between voltage Ube >=0.7V when, Q1 saturation conductions, relay LS1 is powered, and 3 ends are attracted with 5 ends, at this time voltage regulation filtering electricity
Road is ended, and circuit is not lighted without output, indicator light D4, so then achievees the purpose that protect electronic product.When voltage restores normal,
That is Ube<When 0.7V, Q1 cut-offs, relay LS1 is not turned on, and 3 ends are attracted with 4 ends again, and filter circuit of pressure-stabilizing is connected and exports
12V voltages, indicator light D4 are lighted, and electronic product charges normal.
Zener diode D2 and resistance R4 constitutes the reference voltage source of triode Q1, it can be ensured that the emitter potential of Q1
Remain unchanged, thus may be implemented in voltage fluctuation, realized to the conducting of filter circuit of pressure-stabilizing using the Ube voltages of Q1 and
Cut-off is controlled, to protect electronic product not influenced by voltage fluctuation in charging process.
In addition, as shown in Figure 1, the transforming circuit includes transformer T, the poles P are same with the secondary inductance coil L1's of transformer T
Name end is connected, the diode D1 that the poles N are connected with the poles N of diode D3, it is positive be connected with the poles N of diode D1, cathode
The polar capacitor C1 being connected with the poles P of zener diode D2.
Specifically, the non-same polarity of secondary inductance coil L1 of transformer T connect with the poles P of zener diode D2 it is same
When be grounded, the Same Name of Ends of secondary inductance coil L2 of the transformer T connect with 4 ends of relay LS1, its non-same polarity then with
Filter circuit of pressure-stabilizing is connected, and the primary side inductance coil of the transformer T connects alternating current.
Power grid is exported after transformer T transformations by the secondary of transformer T, and voltage carries out halfwave rectifier, pole through diode D1
Property capacitance C1 be filtered after output give protection control circuit.The capacitance of polar capacitor C1 is 470 μ F, the model of diode D1
For 1N4001.
In order to which when transient high voltage occurs in power grid, circuit is not damaged, the primary side of transformer T is also associated with over-pressed guarantor
Protection circuit.Specifically, the overvoltage crowbar includes the Same Name of Ends and non-same polarity for the primary side inductance coil for being serially connected in transformer T
Between varistor RT, one end connect with the non-same polarity of the primary side inductance coil of transformer T, the other end and transformer T
The fuse F1 of input terminal is collectively formed in the Same Name of Ends of primary side inductance coil；The input terminates 220V alternating currents.When network voltage wink
Between it is excessively high when, varistor RT punctures immediately, so that fuse F1 fuse, so can then protect late-class circuit.
The filter circuit of pressure-stabilizing includes diode rectifier U1, three terminal regulator U2, polar capacitor C2, polar capacitor C3 with
And capacitance C4, as shown in Figure 1.
The anode of polar capacitor C2 is connected with the VIN pins of three terminal regulator U2, cathode and three terminal regulator U2
GND pins are grounded while being connected.Polar capacitor C3 anode be connected with the VOUT pins of three terminal regulator U2, cathode and
The cathode of polar capacitor C2 is connected.Capacitance C4 is in parallel with polar capacitor C3.An input terminal of diode rectifier U1 with
The 3 ends connection of relay LS1, another input terminal are connect with the non-same polarity of the secondary inductance coil L2 of transformer T；Three end
The VIN pins of voltage-stablizer U2 are connect with 2 feet of diode rectifier U1, and GND pins then connect with 1 foot of diode rectifier U1
It connects.The VOUT pins of the three terminal regulator U2 form output end.
In the present embodiment, the model LM7812 of three terminal regulator U2, the appearance of polar capacitor C2 and polar capacitor C3
Value is 470 μ F, and the capacitance of capacitance C4 is 0.1 μ F.The voltage of transforming circuit output is through diode rectifier U1 rectifications, polarity electricity
Hold C2 and polar capacitor C3 filtering, three terminal regulator U2 exports stable 12V DC electricity to electronic product progress after carrying out voltage stabilizing
Charging.
As described above, the utility model can be realized well.
Claims (5)
1. a kind of charge protection power supply, it is characterised in that：Including transforming circuit, the protection control being connected with transforming circuit is electric
Road, and respectively with transforming circuit and the filter circuit of pressure-stabilizing that is connected of protection control circuit；The protection control circuit according to
The conducting and cut-off of the size control filter circuit of pressure-stabilizing of voltage.
2. a kind of charge protection power supply according to claim 1, it is characterised in that：The protection control circuit includes three poles
It is steady that the pole pipe Q1, relay LS1, P is connected with transforming circuit, the poles N are connected after resistance R5 with the emitter of triode Q1
The pressure diode pole D2, P is connected with the collector of triode Q1, the diode D3 that the poles N are connected with transforming circuit, one end and surely
The poles P of diode D2 are pressed to be connected, the electricity that the other end is sequentially connected after potentiometer R2 and resistance R1 with the poles N of diode D3
Hinder R3, the resistance R4 being serially connected between the poles N of zener diode D2 and the poles N of diode D3, the poles the N phase of one end and diode D3
The resistance R6 that connection, the other end are connect after indicator light D4 with 1 end of relay LS1；The base stage and current potential of the triode Q1
The control terminal connection of device R2, its collector are connected with 2 ends of relay LS1；3 ends of the relay LS1 and voltage regulation filtering
Circuit connection, its 4 end are then connect with transforming circuit, its 5 end is empty foot.
3. a kind of charge protection power supply according to claim 2, it is characterised in that：The transforming circuit includes transformer T,
The poles P are connected with the Same Name of Ends of the secondary inductance coil L1 of transformer T, the diode that the poles N are connected with the poles N of diode D3
D1, anode be connected with the poles N of diode D1, the polar capacitor C1 that cathode is connected with the poles P of zener diode D2；The change
The non-same polarity of secondary inductance coil L1 of depressor T is grounded while connection with the poles P of zener diode D2, the transformer T
The Same Name of Ends of secondary inductance coil L2 connect with 4 ends of relay LS1, its non-same polarity is then connected with filter circuit of pressure-stabilizing
It connects, the primary side inductance coil of the transformer T connects alternating current.
4. a kind of charge protection power supply according to claim 3, it is characterised in that：The filter circuit of pressure-stabilizing includes two poles
Pipe rectifier U1, three terminal regulator U2, anode is connected with the VIN pins of three terminal regulator U2, cathode and three terminal regulator U2
The polar capacitor C2 that is grounded while be connected of GND pins, anode is connected with the VOUT pins of three terminal regulator U2, cathode
The polar capacitor C3 being connected with the cathode of polar capacitor C2, and the capacitance C4 that is in parallel with polar capacitor C3；Two pole
An input terminal of pipe rectifier U1 connect with 3 ends of relay LS1, the secondary inductance coil L2 of another input terminal and transformer T
Non-same polarity connection；The VIN pins of the three terminal regulator U2 are connect with 2 feet of diode rectifier U1, and GND pins are then
It is connect with 1 foot of diode rectifier U1；The VOUT pins of the three terminal regulator U2 form output end.
5. a kind of charge protection power supply according to claim 4, it is characterised in that：The primary side of the transformer T is also connected with
There is overvoltage crowbar；The overvoltage crowbar includes the Same Name of Ends of the primary side inductance coil for being serially connected in transformer T and non-same
Varistor RT between name end, one end connect with the non-same polarity of the primary side inductance coil of transformer T, the other end and transformer
The fuse F1 of input terminal is collectively formed in the Same Name of Ends of the primary side inductance coil of T.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721726449.1U CN207743742U (en) | 2017-12-12 | 2017-12-12 | A kind of charge protection power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721726449.1U CN207743742U (en) | 2017-12-12 | 2017-12-12 | A kind of charge protection power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207743742U true CN207743742U (en) | 2018-08-17 |
Family
ID=63117801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721726449.1U Expired - Fee Related CN207743742U (en) | 2017-12-12 | 2017-12-12 | A kind of charge protection power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207743742U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109708161A (en) * | 2018-12-07 | 2019-05-03 | 国网浙江海盐县供电有限公司 | A kind of electric stove pot suitable for the transformation of rural area fire stove |
-
2017
- 2017-12-12 CN CN201721726449.1U patent/CN207743742U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109708161A (en) * | 2018-12-07 | 2019-05-03 | 国网浙江海盐县供电有限公司 | A kind of electric stove pot suitable for the transformation of rural area fire stove |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180817 Termination date: 20181212 |