CN204290455U - The fast charger of a kind of novel constant-temperature - Google Patents
The fast charger of a kind of novel constant-temperature Download PDFInfo
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- CN204290455U CN204290455U CN201420687098.8U CN201420687098U CN204290455U CN 204290455 U CN204290455 U CN 204290455U CN 201420687098 U CN201420687098 U CN 201420687098U CN 204290455 U CN204290455 U CN 204290455U
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Abstract
The utility model discloses the fast charger of a kind of novel constant-temperature, comprise ac input end, DC output end, EMI Filtering loop, the first current rectifying and wave filtering circuit, transformer, the second rectification filtering circuit, temperature feedback circuit, switching circuitry and MCU control unit.The utility model is by adopting temperature feedback value, and charger, when exporting, all can adopt limiting value to export, and the heat that loss causes can slowly increase, and when arriving balance point, adopts the value of feedback of temperature, the power of regulation output; The utility model can reach the object of quick charge, when quick charge, neglects high voltage, and the long-time impact on product reliability of big current, gets limiting value, be conducive to quick charge.
Description
Technical field
The utility model relates to a kind of charger, particularly relates to the fast charger of a kind of novel constant-temperature.
Background technology
At present, the charger of current trend has constant current, constant voltage two kinds, these the two kinds electric currents adopting output respectively, or voltage signal is as feedback signal, and then the electric current of regulation output or voltage.And due to this body structure of circuit in the process regulated, quick charge be reached, design comparison is complicated, and cost is higher.
Utility model content
The purpose of this utility model is just to provide a kind of novel constant-temperature fast charger to solve the problem.
The utility model is achieved through the following technical solutions above-mentioned purpose:
The utility model comprises ac input end, DC output end, EMI Filtering loop, first current rectifying and wave filtering circuit, transformer, second rectification filtering circuit, temperature feedback circuit, switching circuitry and MCU control unit, the output of described ac input end is connected with the input in described EMI Filtering loop, the output in described EMI Filtering loop is connected with the input of described first rectification filtering circuit, the output of described first rectification filtering circuit is connected with the input of described transformer, the output of described transformer is connected with the input of described second rectification filtering circuit, the output of described second rectification filtering circuit is connected with the input of described DC output end and described temperature feedback circuit respectively, the output of described temperature feedback circuit is connected with the input of described MCU control unit, the output of described MCU control unit is connected with the input in described switching circuitry and described EMI Filtering loop respectively.
Further, described temperature feedback circuit comprises voltage feedback loop, output current feedback loop and control loop.
Further, described voltage feedback loop controls ceiling voltage, through the first resistor and the sampling of the second resistor divider, then the RB0 end of described MCU control unit is fed back to through voltage stabilizing didoe and photoelectric coupler isolation, the RB1 end of MCU control unit regulates the control to field effect transistor, thus realizes the control to exporting maximum voltage.
Further, described output current feedback loop controls maximum output current value, through current sampling resistor, the RA2 end sending current signal to arrive described MCU control unit, described MCU control unit through calculating, by RB1 end regulate to field effect transistor control, thus realize maximum current restriction.
Further, described control loop is through the characteristic of thermistor to temperature, and the voltage of series loop the 11 resistor and the 12 resistor can change, the RB2 end of corresponding voltage sample value MCU control unit, through calculating, realize the adjustment to power output.
The beneficial effects of the utility model are:
The utility model is by adopting temperature feedback value, and charger, when exporting, all can adopt limiting value to export, and the heat that loss causes can slowly increase, and when arriving balance point, adopts the value of feedback of temperature, the power of regulation output; The utility model can reach the object of quick charge, when quick charge, neglects high voltage, and the long-time impact on product reliability of big current, gets limiting value, be conducive to quick charge.
Accompanying drawing explanation
Fig. 1 is the structural representation of the fast charger of a kind of novel constant-temperature described in the utility model;
Fig. 2 is the circuit diagram of the fast charger of a kind of novel constant-temperature described in the utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As shown in Figure 1: the utility model comprises ac input end, DC output end, EMI Filtering loop, first current rectifying and wave filtering circuit, transformer, second rectification filtering circuit, temperature feedback circuit, switching circuitry and MCU control unit, the output of ac input end is connected with the input in EMI Filtering loop, the output in EMI Filtering loop is connected with the input of the first rectification filtering circuit, the output of the first rectification filtering circuit is connected with the input of transformer, the output of transformer is connected with the input of the second rectification filtering circuit, the output of the second rectification filtering circuit is connected with the input of DC output end and temperature feedback circuit respectively, the output of temperature feedback circuit is connected with the input of MCU control unit, the output of MCU control unit is connected with the input in switching circuitry and EMI Filtering loop respectively.
As shown in Figure 2, temperature feedback circuit comprises voltage feedback loop, output current feedback loop and control loop, voltage feedback loop controls ceiling voltage, through the first resistor R1 and the sampling of the second resistor R2 dividing potential drop, then the RB0 end of MCU control unit IC5 is fed back to through voltage stabilizing didoe U1 and photoelectrical coupler IC1 isolation, the RB1 end of MCU control unit IC5 regulates the control to field effect transistor Q2, thus the control realized exporting maximum voltage, output current feedback loop controls maximum output current value, through current sampling resistor R3, the RA2 end sending current signal to arrive MCU control unit IC5, passing through of MCU control unit IC5 calculates, regulated by RB1 end and field effect transistor Q2 is controlled, thus realize maximum current restriction, control loop is through the characteristic of thermistor TH2 to temperature, the voltage of series loop the 11 resistor R11 and the 12 resistor R12 can change, the RB2 end of corresponding voltage sample value MCU control unit IC5, through calculating, realize the adjustment to power output.
Operation principle of the present utility model is as follows:
As depicted in figs. 1 and 2: front end AC electricity 220v/50Hz is behind EMI Filtering loop, through rectifying and wave-filtering, obtain 310v direct current, through transformer T1 and switch buck loop, obtain lower direct current square wave, again through exporting commutating circuit, obtaining a DC power supply and exporting to load, the watt level of output directly can cause the generation of heat, by output temperature feedback loop, reference value is sent back to MCU control unit IC5, thus the power of regulation output, reach heat balance; Output limit electric current and the magnitude of voltage MCU control unit IC5 of this circuit can set when starting working, and follow-up is controlled by temperature feedback value.
As shown in Figure 2: CON1 is that electric main enters, through fuse F1, EMI Filtering loop, then rectifying and wave-filtering, obtain 310v direct voltage, through transformer T1, field effect transistor Q2, a low pressure fluctuation direct current is obtained in the primary side of transformer T1, through the first diode D1 of primary side, the tenth diode D10, after the second capacitor C2 rectifying and wave-filtering, obtain stable dc power supply, after export to power consumption equipment through CON2, voltage feedback loop controls ceiling voltage, through the first resistor R1 and the sampling of the second resistor R2 dividing potential drop, then the RB0 end of MCU control unit IC5 is fed back to through voltage stabilizing didoe U1 and photoelectrical coupler IC1 isolation, the RB1 end of MCU control unit IC5 regulates the control to field effect transistor Q2, thus the control realized exporting maximum voltage, output current feedback loop controls maximum output current value, through current sampling resistor R3, the RA2 end sending current signal to arrive MCU control unit IC5, passing through of MCU control unit IC5 calculates, regulated by RB1 end and field effect transistor Q2 is controlled, thus realize maximum current restriction, control loop is through the characteristic of thermistor TH2 to temperature, the voltage of series loop the 11 resistor R11 and the 12 resistor R12 can change, the RB2 end of corresponding voltage sample value MCU control unit IC5, through calculating, realize the adjustment to power output, by loop the 8th resistor R8 and the 9th resistor R9, input voltage is measured, can realize civil power too high or cross under-voltage protection, thus ensure that charger normally works, this circuit also can omit photoelectrical coupler IC1, this road sampling circuit of voltage stabilizing didoe U1, utilize the 13 resistor R13 and the 14 resistor R14 to the sampled value of voltage vcc, realize the control to exporting maximum voltage, effectively can save cost like this.
Those skilled in the art do not depart from essence of the present utility model and spirit, various deformation scheme can be had to realize the utility model, the foregoing is only the better feasible embodiment of the utility model, not thereby interest field of the present utility model is limited to, the equivalent structure change that all utilization the utility model specifications and accompanying drawing content are done, is all contained within interest field of the present utility model.
Claims (5)
1. the fast charger of novel constant-temperature, it is characterized in that: comprise ac input end, DC output end, EMI Filtering loop, first current rectifying and wave filtering circuit, transformer, second rectification filtering circuit, temperature feedback circuit, switching circuitry and MCU control unit, the output of described ac input end is connected with the input in described EMI Filtering loop, the output in described EMI Filtering loop is connected with the input of described first rectification filtering circuit, the output of described first rectification filtering circuit is connected with the input of described transformer, the output of described transformer is connected with the input of described second rectification filtering circuit, the output of described second rectification filtering circuit is connected with the input of described DC output end and described temperature feedback circuit respectively, the output of described temperature feedback circuit is connected with the input of described MCU control unit, the output of described MCU control unit is connected with the input in described switching circuitry and described EMI Filtering loop respectively.
2. the fast charger of a kind of novel constant-temperature according to claim 1, is characterized in that: described temperature feedback circuit comprises voltage feedback loop, output current feedback loop and control loop.
3. the fast charger of a kind of novel constant-temperature according to claim 2, it is characterized in that: described voltage feedback loop controls ceiling voltage, by the first resistor and the sampling of the second resistor divider, after through voltage stabilizing didoe and photoelectric coupler isolation feed back to described MCU control unit RB0 end, the RB1 end of MCU control unit regulates the control to field effect transistor, thus realizes the control to exporting maximum voltage.
4. the fast charger of a kind of novel constant-temperature according to claim 2, it is characterized in that: described output current feedback loop controls maximum output current value, pass through current sampling resistor, the RA2 end sending current signal to arrive described MCU control unit, passing through of described MCU control unit calculates, regulated by RB1 end and field effect transistor is controlled, thus realize maximum current restriction.
5. the fast charger of a kind of novel constant-temperature according to claim 2, it is characterized in that: described control loop is through the characteristic of thermistor to temperature, the voltage of series loop the 11 resistor and the 12 resistor can change, the RB2 end of corresponding voltage sample value MCU control unit, through calculating, realize the adjustment to power output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420687098.8U CN204290455U (en) | 2014-11-18 | 2014-11-18 | The fast charger of a kind of novel constant-temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420687098.8U CN204290455U (en) | 2014-11-18 | 2014-11-18 | The fast charger of a kind of novel constant-temperature |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204290455U true CN204290455U (en) | 2015-04-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420687098.8U Expired - Fee Related CN204290455U (en) | 2014-11-18 | 2014-11-18 | The fast charger of a kind of novel constant-temperature |
Country Status (1)
| Country | Link |
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| CN (1) | CN204290455U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107181306A (en) * | 2017-06-29 | 2017-09-19 | 深圳市泰衡诺科技有限公司上海分公司 | A kind of fast charging system |
-
2014
- 2014-11-18 CN CN201420687098.8U patent/CN204290455U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107181306A (en) * | 2017-06-29 | 2017-09-19 | 深圳市泰衡诺科技有限公司上海分公司 | A kind of fast charging system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150422 Termination date: 20151118 |
|
| EXPY | Termination of patent right or utility model |