CN101154824A - Charger circuit with output voltage compensation - Google Patents
Charger circuit with output voltage compensation Download PDFInfo
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- CN101154824A CN101154824A CNA2006101525568A CN200610152556A CN101154824A CN 101154824 A CN101154824 A CN 101154824A CN A2006101525568 A CNA2006101525568 A CN A2006101525568A CN 200610152556 A CN200610152556 A CN 200610152556A CN 101154824 A CN101154824 A CN 101154824A
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Abstract
An output voltage compensation charger circuit comprises an AC/DC circuit, an output interface, an charging control circuit and a compensation circuit, wherein, the AC/DC circuit converts DC power into an AC power, and the AC power charges up the battery through the output interface after boosted through the transformer; the charging control circuit is used to increase the voltage of the output interface so as to accelerate charging the battery, and the voltage lost in the circuit compensation circuit is compensated by the compensation circuit; thus, the energy loss caused by the circuit internal resistance can be overcome, maintaining the charging effect of the charger.
Description
Technical field
The present invention relates to a kind of charger circuit of tool output voltage compensation.
Background technology
Present most of charger all has the function of two-part charging, can select to want normal speed also to charge or quick charge for the user; So-called quick charge be meant directly being connected in the bigger power supply of battery input on the charger charging, and the charging of so-called normal speed then is to battery charge with less power supply.
See also shown in Figure 3, general charger mainly is after by an interchange commentaries on classics DC circuit 10 AC power 20 being converted to DC power supply, sending into a transformer 30 boosts to export a booster power, this booster power charges by 40 pairs one batteries of an output interface 50 after rectification again, and in output interface 40 connections one checking circuit 80, detect battery 50 by this checking circuit 80 and whether connect output interface 40, then cooperate a feedback circuit 90 to make a control circuit 91 improve the booster power of transformer 30 outputs if connect, and battery 50 is charged with bigger power supply.
Yet under actual conditions, any circuit all has its internal resistance, when the booster power via line of these transformer 30 outputs is delivered to output interface 40, can be consumed portion of energy by the internal resistance of circuit, cause the output interface 40 actual power supplys of exporting to battery 50 to be less than the booster power of transformer 30 outputs, and then influence the charging effect of charger.Though can keep with the energy of compensated line consumption normally to battery 50 chargings by the control circuit 91 further booster powers that promote transformer 30 outputs, but the energy loss that the circuit internal resistance is caused is relevant with the power supply size of battery 50 chargings, therefore promote the booster power of transformer 30 outputs and the energy of compensated line institute loss suitably regularly, still have aforesaid drawbacks to wait to overcome so have charger now.
Summary of the invention
Technical problem underlying to be solved by this invention is, the shortcoming that causes the decline of charger out-put supply for the circuit internal resistance that overcomes circuit, and provide a kind of charger circuit of tool output voltage compensation, the pressure drop that can provide a bucking voltage to be produced because of the circuit internal resistance with compensation.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of charger circuit of tool output voltage compensation is characterized in that, comprising: one exchanges the commentaries on classics DC circuit, is to connect an AC power, and AC power is converted to a direct current power supply; One transformer has primary coil and secondary coil, and primary coil is to connect aforementioned interchange to change DC circuit to receive aforementioned DC power supply, and secondary coil is then responded to this DC power supply and exported a booster power; One output interface is to connect aforementioned transformer secondary output coil, for being connected to export this booster power to battery charge with a battery; One charging control circuit is that an end connects aforementioned transformer, and end connects this transformer secondary output coil and output interface in addition, can improve this booster power to quicken battery charge when battery connects this output interface; One compensating circuit is that an end connects aforementioned transformer secondary output coil, and end connects aforementioned charging control circuit in addition, cooperates this charging control circuit to improve this booster power again to compensate by the energy of line loss when battery is connected in output interface.
The charger circuit of aforementioned tool output voltage compensation, wherein charging control circuit comprises: a pulse width modulation circuit is aforementioned interchange commentaries on classics DC circuit of connection and transformer are sent into transformer with control a DC power supply size; One sensing circuit is to connect the output voltage size of aforementioned transformer secondary output coil with the detecting output interface; One isolated controller connects aforementioned pulse width modulation circuit with a receiving terminal, and connects this sensing circuit with a transmitting terminal; One switch, it is the transmitting terminal that connects aforementioned sensing circuit and isolated controller, by this switch conduction of output voltage that this sensing circuit detected size control whether, and then cooperate this isolated controller and allow the DC power supply size of this pulse width modulation circuit control input transformer primary coil.
The charger circuit of aforementioned tool output voltage compensation, wherein pulse width modulation circuit mainly comprises a control IC, and this control IC connects aforementioned interchange changes DC circuit, the primary coil of transformer and the receiving terminal of this isolated controller.
The charger circuit of aforementioned tool output voltage compensation, wherein isolated controller is an optical coupler, the light effect LED that waits in this optical coupler connects the transmitting terminal of this sensing circuit, and the equivalent phototransistor in the optical coupler connects the receiving terminal of this pulse width modulation circuit in addition.
The charger circuit of aforementioned tool output voltage compensation, wherein compensating circuit comprises: a diode, its negative terminal are the secondary coils that connects aforementioned transformer; One electric capacity is to be connected between the anode and an earth terminal of aforementioned diodes; One the 5th resistance is to be connected between aforementioned diodes and the electric capacity; One the 6th resistance is to connect this sensing circuit and switch.
The charger circuit of aforementioned tool output voltage compensation, wherein sensing circuit mainly is to comprise the first, second, third and the 4th resistance, this constant resistance is to connect in regular turn, wherein the end in addition of this first resistance is to connect transformer secondary output coil and output interface, the 4th resistance is ground connection, and second is the 6th resistance that is connected this compensating circuit with the series connection node of the 3rd resistance.
The charger circuit of aforementioned tool output voltage compensation, wherein switch is that a model is the IC of TL431, its plus earth and negative electrode are the transmitting terminals that connects aforementioned isolated controller, in addition, then connect the series connection node of this second and the 3rd resistance with reference to the utmost point.
The charger circuit of aforementioned tool output voltage compensation, wherein exchanging the commentaries on classics DC circuit is a full-wave rectifying circuit.
Utilize the aforementioned techniques means, when battery connects this output interface, except that detecting and improve the booster power of transformer secondary output coil output by this charging control circuit, can cooperate this charging control circuit further to improve the booster power of transformer secondary output coil output by this compensating circuit in addition, compensate whereby by the energy of line loss, and can keep the charging effect of charger.
The pressure drop that can provide a bucking voltage to be produced because of the circuit internal resistance with compensation is provided.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the functional block diagram of a preferred embodiment of the present invention.
Fig. 2 is the circuit diagram of a preferred embodiment of the present invention.
Fig. 3 is the functional block diagram of existing charger.
The number in the figure explanation:
10 exchange commentaries on classics DC circuit 20 AC power
30 transformers
31 primary coils, 32 secondary coils
40 output interfaces
50 batteries, 60 charging control circuits
61 pulse width modulation circuits, 62 sensing circuits
63 isolated controllers
631 receiving terminals, 632 transmitting terminals
64 switches, 70 compensating circuits
80 checking circuits, 90 feedback circuits
91 control circuits
Embodiment
At first see also shown in Figure 1ly, a preferred embodiment of the charger circuit of tool output voltage compensation of the present invention is to comprise:
One exchanges commentaries on classics DC circuit 10, is to connect an AC power 20, and AC power is converted to a direct current power supply;
One transformer 30 has primary coil and secondary coil, and wherein primary coil is to connect aforementioned interchange to change DC circuit 10, and secondary coil is responded to this DC power supply and exported a booster power;
One output interface 40 is to connect aforementioned transformer 30 secondary coils, for being connected with battery 50 to export this booster power to battery 50 chargings;
One charging control circuit 60, be that an end connects aforementioned transformer 30 primary coils, end connects this transformer 30 secondary coils and output interface 40 in addition, and when battery 50 was connected in output interface 40, described charging control circuit 60 can improve this booster power to quicken battery 50 chargings;
One compensating circuit 70, be that an end connects aforementioned transformer 30 secondary coils, end connects aforementioned charging control circuit 60 in addition, when battery 50 connects output interface 40, described compensating circuit 70 cooperates this charging control circuit 60 further to improve this booster power again, whereby the energy of compensation because of consumed by the circuit internal resistance.
Below for the detailed circuit of the foregoing description is described further, please cooperate Fig. 1, shown in Figure 2, this interchange is changeed DC circuit 10 and mainly is made up of a full-wave rectifier D1～D4.
This charging control circuit 60 comprises a pulse wave width modulation pwm circuit 61, a sensing circuit 62, one isolated controller 63 and a switch 64, wherein:
This pulse wave width modulation pwm circuit 61 is aforementioned interchange commentaries on classics DC circuit 10 of connection and transformer 30 primary coils 31 are sent into transformer 30 primary coils 31 with control DC power supply sizes, when the DC power supply of sending into big more, then the booster power from 32 outputs of transformer 30 secondary coils is just big more, in the present embodiment, pulse width modulation circuit 61 mainly comprises a control IC U1, and this control IC connects the primary coil 31 that DC circuit 10 and transformer 30 are changeed in aforementioned interchange;
This sensing circuit 62 is to connect the output voltage size of aforementioned transformer 30 secondary coils 32 with detecting output interface 40, this sensing circuit 62 mainly comprises the first, second, third and the 4th resistance R 17, R14, R18, R15 in the present embodiment, these resistance R 17, R14, R18, R15 connect in regular turn, wherein the in addition end of this first resistance R 17 be connect transformer 30 secondary coils 32 and output interface 40, the four resistance R 15 hold then ground connection in addition;
This isolated controller 63 is to connect aforementioned pulse width modulation circuit 61 with a receiving terminal 631, and connect this sensing circuit 62 with a transmitting terminal 632, this isolated controller 63 is optical couplers in the present embodiment, equivalent LED P H1A in this optical coupler promptly is the transmitting terminal 632 that connects this sensing circuit 62, and the equivalent phototransistor PH1B in the optical coupler then is the receiving terminal 631 that connects this pulse width modulation circuit 61 in addition;
This switch 64 is the transmitting terminals 632 that connect aforementioned sensing circuit 62 and isolated controller 63, this switch 64 is IC of a model (TL431) U11 in the present embodiment, its anode A ground connection and negative electrode K connect to wait the light effect LED negative terminal in the aforementioned lights coupler, then connect the series connection node K of the second and the 3rd resistance R 14, R18 in addition with reference to utmost point R.
This compensating circuit 70 comprises a diode D12, a capacitor C 15 and the 5th and the 6th resistance R 21, R20 in the present embodiment, wherein the negative terminal of this diode D12 is the secondary coil 32 that connects aforementioned transformer 30, this capacitor C 15 is to be connected between the anode and ground end of this diode D12, and the 5th resistance R 21 is to be connected between diode D12 and the capacitor C 15, and the 6th resistance R 20 is the series connection node K that connect the reference utmost point R of capacitor C 15, (TL431) U11 and the second and the 3rd resistance R 14, R18.
When battery 50 does not connect this output interface 40 as yet, sensing circuit 62 will obtain the high pressure from 32 outputs of transformer 30 secondary coils, so this second and the 3rd resistance R 14, the voltage of the serially connected nodes K of R18 also is high levle, therefore switch 64 conductings, after switch 64 conductings, then conducting and shinny of equivalent LED P H1A in the optical coupler, and then make equivalent phototransistor PH1B conducting in the optical coupler, the equivalent phototransistor PH1B that detects in this optical coupler when this pulse width modulation circuit 61 is when being conducting state, and this pulse width modulation circuit 61 will not adjusted the DC power supply size of input transformer 30 primary coils 31.
After a battery 50 to be charged is connected in this output interface 40, because the electric energy deficiency of battery 50, the voltage of military order output interface 40 reduces, and the voltage drop that makes this serially connected nodes K is low to moderate low level, thereby make switch 64 end, in a single day switch 64 ends, equivalent LED P H1A in the optical coupler also by and not shinnyly make the equivalent phototransistor PH1B in the optical coupler end, the equivalent phototransistor PH1B that this moment, this pulse width modulation circuit 61 detected in this optical coupler is cut-off state, so improve the DC power supply size of sending into transformer 30 primary coils 31, being increased to the voltage that makes this serially connected nodes K up to the voltage of output interface 40 is enough to allow switch 64 transfer conducting again to, and then make equivalent LED P H1A conducting in the optical coupler shinny and drive equivalent phototransistor PH1B conducting in the optical coupler, the equivalent phototransistor PH1B that this moment, this pulse width modulation circuit 61 detected in this optical coupler is conducting state, so this pulse width modulation circuit 61 just reduces the DC power supply of sending into transformer 30 primary coils 31.
But because actual track all has line impedance, when therefore the output voltage of transformer 30 secondary coils 32 reaches output interface 40, this line impedance can consume the part output voltage, so the charging voltage of battery 50 is a little less than the voltage of being exported from transformer 30 secondary coils 32; And the present invention is by the secondary coil 32 that the diode D12 of compensating circuit 70 is connected transformer 30 with negative terminal, can be equal in the anode of diode D12 to produce a negative voltage source is arranged, this negative voltage source is the output voltage size of corresponding transformer 30 secondary coils 32 and changing, therefore be connected with output interface 40 and when causing the voltage reduction of serially connected nodes K when battery 50 to be charged, the voltage of this negative voltage source military order serially connected nodes K reduces again, control IC U1 must be controlled with higher DC power supply send into transformer 30 primary coils 31, further improve the output voltage of transformer 30 secondary coils again, compensation is because of being subjected to the electric energy of actual track internal resistance loss whereby, and voltage that can be bigger charges to battery 50.
From the above, the present invention not only can improve the voltage to battery charge when battery is installed, and more can cooperate charging control circuit that the electric energy of circuit institute loss is compensated by this compensating circuit, to keep preferable charging effect.
The above, it only is preferred embodiment of the present invention, be not that the present invention is done any pro forma restriction, every foundation technical spirit of the present invention all still belongs in the scope of technical solution of the present invention any simple modification, equivalent variations and modification that above embodiment did.
In sum, the present invention is on structural design, use practicality and cost benefit, it is required to meet industry development fully, and the structure that is disclosed also is to have unprecedented innovation structure, have novelty, creativeness, practicality, the regulation that meets relevant patent of invention important document is so mention application in accordance with the law.
Claims (8)
1. the charger circuit of a tool output voltage compensation is characterized in that, comprising:
One exchanges the commentaries on classics DC circuit, is to connect an AC power, and AC power is converted to a direct current power supply;
One transformer has primary coil and secondary coil, and primary coil is to connect aforementioned interchange to change DC circuit to receive aforementioned DC power supply, and secondary coil is then responded to this DC power supply and exported a booster power;
One output interface is to connect aforementioned transformer secondary output coil, for being connected to export this booster power to battery charge with a battery;
One charging control circuit is that an end connects aforementioned transformer, and end connects this transformer secondary output coil and output interface in addition, can improve this booster power to quicken battery charge when battery connects this output interface;
One compensating circuit is that an end connects aforementioned transformer secondary output coil, and end connects aforementioned charging control circuit in addition, cooperates this charging control circuit to improve this booster power again when battery is connected in output interface.
2. according to the charger circuit of the described tool output voltage compensation of claim 1, it is characterized in that described charging control circuit comprises:
One pulse width modulation circuit is aforementioned interchange commentaries on classics DC circuit of connection and transformer are sent into transformer with control a DC power supply size;
One sensing circuit is to connect the output voltage size of aforementioned transformer secondary output coil with the detecting output interface;
One isolated controller connects aforementioned pulse width modulation circuit with a receiving terminal, and connects this sensing circuit with a transmitting terminal;
One switch, it is the transmitting terminal that connects aforementioned sensing circuit and isolated controller, by this switch conduction of output voltage that this sensing circuit detected size control whether, and then cooperate this isolated controller and allow the DC power supply size of this pulse width modulation circuit control input transformer primary coil.
3. according to the charger circuit of the described tool output voltage compensation of claim 2, it is characterized in that described pulse width modulation circuit mainly comprises a control IC, this control IC connects aforementioned interchange changes DC circuit, the primary coil of transformer and the receiving terminal of this isolated controller.
4. according to the charger circuit of the described tool output voltage compensation of claim 2, it is characterized in that described isolated controller is an optical coupler, the light effect LED that waits in this optical coupler connects the transmitting terminal of this sensing circuit, and the equivalent phototransistor in the optical coupler connects the receiving terminal of this pulse width modulation circuit in addition.
5. according to the charger circuit of each described tool output voltage compensation in the claim 2 to 4, it is characterized in that described compensating circuit comprises:
One diode, its negative terminal are the secondary coils that connects aforementioned transformer;
One electric capacity is to be connected between the anode and an earth terminal of aforementioned diodes;
One the 5th resistance is to be connected between aforementioned diodes and the electric capacity;
One the 6th resistance is to connect this sensing circuit and switch.
6. according to the charger circuit of the described tool output voltage compensation of claim 5, it is characterized in that described sensing circuit mainly is to comprise the first, second, third and the 4th resistance, this constant resistance is to connect in regular turn, wherein the end in addition of this first resistance is to connect transformer secondary output coil and output interface, the 4th resistance is ground connection, and second is the 6th resistance that is connected this compensating circuit with the series connection node of the 3rd resistance.
7. according to the charger circuit of the described tool output voltage compensation of claim 6, it is characterized in that described switch is that a model is the IC of TL431, its plus earth and negative electrode are the transmitting terminals that connects aforementioned isolated controller, in addition, then connect the series connection node of this second and the 3rd resistance with reference to the utmost point.
8. according to the charger circuit of the described tool output voltage compensation of claim 1, it is characterized in that it is a full-wave rectifying circuit that DC circuit is changeed in described interchange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101525568A CN101154824B (en) | 2006-09-29 | 2006-09-29 | Charger circuit with output voltage compensation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101525568A CN101154824B (en) | 2006-09-29 | 2006-09-29 | Charger circuit with output voltage compensation |
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| Publication Number | Publication Date |
|---|---|
| CN101154824A true CN101154824A (en) | 2008-04-02 |
| CN101154824B CN101154824B (en) | 2010-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006101525568A Active CN101154824B (en) | 2006-09-29 | 2006-09-29 | Charger circuit with output voltage compensation |
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| Country | Link |
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| CN (1) | CN101154824B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102088195B (en) * | 2009-12-08 | 2013-01-16 | 扬智科技股份有限公司 | Portable electronic device and related charging control method |
| CN104350649A (en) * | 2013-04-22 | 2015-02-11 | 联发科技股份有限公司 | Method for communicating electronic apparatus with adaptor via specific communication interface to adjust operation behavior of adaptor, electronic apparatus, and corresponding adaptor |
| CN109391007A (en) * | 2018-11-16 | 2019-02-26 | 北汽福田汽车股份有限公司 | Vehicle, charging unit |
| CN112018844A (en) * | 2020-08-24 | 2020-12-01 | 维沃移动通信有限公司 | Charging parameter detection circuit and method and charger |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI575856B (en) * | 2016-02-02 | 2017-03-21 | 亞源科技股份有限公司 | Power supply module |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5925533A (en) * | 1982-07-31 | 1984-02-09 | 松下電工株式会社 | Quick charging circuit |
| KR100265709B1 (en) * | 1996-10-15 | 2000-09-15 | 윤종용 | A secondary charginf apparatus |
| CN2405366Y (en) * | 2000-01-19 | 2000-11-08 | 王双成 | Full automatic charging arrangement |
| CN1445904A (en) * | 2003-04-11 | 2003-10-01 | 海尔集团公司 | Portable type charger mobile phone |
| CN1564421A (en) * | 2004-03-17 | 2005-01-12 | 毛锦铭 | Charger for lithium cell |
-
2006
- 2006-09-29 CN CN2006101525568A patent/CN101154824B/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102088195B (en) * | 2009-12-08 | 2013-01-16 | 扬智科技股份有限公司 | Portable electronic device and related charging control method |
| CN104350649A (en) * | 2013-04-22 | 2015-02-11 | 联发科技股份有限公司 | Method for communicating electronic apparatus with adaptor via specific communication interface to adjust operation behavior of adaptor, electronic apparatus, and corresponding adaptor |
| CN109391007A (en) * | 2018-11-16 | 2019-02-26 | 北汽福田汽车股份有限公司 | Vehicle, charging unit |
| CN112018844A (en) * | 2020-08-24 | 2020-12-01 | 维沃移动通信有限公司 | Charging parameter detection circuit and method and charger |
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| Publication number | Publication date |
|---|---|
| CN101154824B (en) | 2010-09-01 |
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