CN101567634A - Electric power circuit, power adapter and charger - Google Patents
Electric power circuit, power adapter and charger Download PDFInfo
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- CN101567634A CN101567634A CNA2009101076261A CN200910107626A CN101567634A CN 101567634 A CN101567634 A CN 101567634A CN A2009101076261 A CNA2009101076261 A CN A2009101076261A CN 200910107626 A CN200910107626 A CN 200910107626A CN 101567634 A CN101567634 A CN 101567634A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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Abstract
The invention embodiment relates to an electric power circuit, which includes an input filtering and a rectification circuit for shifting the external AC power supply into the primary pulsating DC supply voltage; and an energy conversion circuit for shifting the primary DC supply voltage into the secondary power supply current, and supplying power to the load; a control chip for executing high power factor control for the energy conversion circuit. In addition, the invention embodiment also provides a corresponding power adapter and a charger. It can raise the electric energy conversion efficiency of AC electric network of electric power circuit to 90% or more by using the invention embodiment, which is more energy efficient and environmentally friendly.
Description
Technical field
The present invention relates to a kind of power circuit, power supply adaptor and charger.
Background technology
The AC network energy conversion efficiency that traditional AC-DC (AC-DC) switching power circuit is general is difficult to reach 90%, and because its artificail commutation has brought a large amount of harmonic currents to AC network, can the severe contamination power grid environment.
Summary of the invention
Embodiment of the invention technical problem to be solved is, a kind of power circuit, power supply adaptor and charger are provided, and the AC network energy conversion efficiency that can significantly improve power circuit meets or exceeds 90%, energy-conserving and environment-protective more.
For solving the problems of the technologies described above, the embodiment of the invention adopts following technical scheme:
A kind of power circuit comprises:
Input filtering and rectification circuit are used for described external AC power supply is transformed into elementary direct current supply voltage;
The energy conversion circuit is used for becoming secondary supply current that described load is powered described elementary direct current supply voltage transformation;
Control chip is used for described energy conversion circuit is carried out High Power Factor control.
A kind of power supply adaptor comprises power circuit, and described power circuit comprises:
Input filtering and rectification circuit are used for described external AC power supply is transformed into elementary direct current supply voltage;
The energy conversion circuit is used for becoming secondary supply current that described load is powered described elementary direct current supply voltage transformation;
Control chip is used for described energy conversion circuit is carried out High Power Factor control.
A kind of charger comprises power circuit, and described power circuit comprises:
Input filtering and rectification circuit are used for described external AC power supply is transformed into elementary direct current supply voltage;
The energy conversion circuit is used for becoming secondary supply current that described load is powered described elementary direct current supply voltage transformation;
Control chip is used for described energy conversion circuit is carried out High Power Factor control.
The beneficial effect of the embodiment of the invention is:
By a kind of power circuit and corresponding power supply adaptor, charger are provided, the AC network energy conversion efficiency that can significantly improve power circuit meets or exceeds 90%, energy-conserving and environment-protective more.
Below in conjunction with accompanying drawing the embodiment of the invention is described in further detail.
Description of drawings
Fig. 1 is the schematic diagram of the power circuit of the embodiment of the invention;
Fig. 2 is the schematic diagram of the power supply adaptor of the embodiment of the invention;
Fig. 3 is the schematic diagram of the charger of the embodiment of the invention.
Embodiment
The embodiment of the invention provides a kind of power circuit as shown in Figure 1, comprising:
Input filtering and rectification circuit 101 are used for described external AC power supply is transformed into elementary direct current supply voltage;
Implement the power circuit of the embodiment of the invention as shown in Figure 1, the AC network energy conversion efficiency that can significantly improve power circuit meets or exceeds 90%, energy-conserving and environment-protective more.
The power circuit of the invention described above embodiment can be applicable in the various electronic, as power supply adaptor, charger etc., describes with two specific embodiments below.
(1) when the power circuit of the invention described above embodiment was applied in the power supply adaptor, power supply adaptor comprised power circuit as shown in Figure 2:
Input filtering and rectification circuit 201 are used for described external AC power supply is transformed into elementary direct current supply voltage;
Energy conversion circuit 202 is used for becoming secondary supply current that described load is powered described elementary direct current supply voltage transformation, particularly, can comprise:
Primary side loop 2021 is used to import described elementary direct current supply voltage;
Primary side loop 2022 is used to export described secondary supply current, and,
The first negative feedback branch road 2023 with described primary side loop of very first time constant;
The second negative feedback branch road 2024 with described primary side loop of second time constant, and described very first time constant is greater than described second time constant;
Control chip 203 is used for described energy conversion circuit 202 is carried out High Power Factor control;
Elementary auxiliary voltage-stabilized power supply circuit 204 is used for a part of electric energy of described energy conversion circuit 202 is supplied with described control chip 203;
Output controlling circuit of voltage regulation 205 is used for described control chip 203 is adjusted, and carries out voltage stabilizing control with the output voltage to power supply;
In addition, can also be provided with an output current control circuit in the power circuit, be used for detecting the voltage of the described load that obtains according to microcomputer chip U4, by described output controlling circuit of voltage regulation described control chip is adjusted, so that the output current of power supply is controlled, like this, use the action cell of the microcomputer chip U4 of monolithic integrated circuit formula as out-put supply management control, the impulse current of control output load current is eliminated;
Implement the power supply adaptor of the embodiment of the invention as shown in Figure 2, the AC network energy conversion efficiency that can significantly improve power circuit meets or exceeds 90%, energy-conserving and environment-protective more; In addition, adopt time constant that the first negative feedback branch road 2023, the second negative feedback branch road 2024 of above-mentioned magnitude relationship are arranged, the power output that can improve power supply adaptor is exported higher power to more than the 120W than prior art under identical volume conditions.
(2) when the power circuit of the invention described above embodiment is applied in the charger, charger removes the power circuit that comprises as shown in Figure 3:
Input filtering and rectification circuit, be used for described external AC power supply is transformed into elementary direct current supply voltage, particularly, conducted noise from the external AC power supply of AC85V～265V/50Hz/60Hz AC network can be cut down, simultaneously, also can be with the energy conversion circuit owing to the conducted noise that conversion work causes is cut down, become the ripple direct voltage behind external AC power supply behind the wave device process rectifier bridge DB1 after filtration, after capacitor C 4 filtering are level and smooth, form the elementary ripple direct current supply of power frequency voltage then;
The energy conversion circuit, be used for described elementary ripple direct current supply voltage transformation become secondary supply current (as direct current or pulse current) to as described in load power, particularly, can comprise:
The primary side loop is used to import described elementary direct current supply voltage;
The primary side loop is used to export described secondary supply current, and,
The first negative feedback branch road with described primary side loop of very first time constant;
The second negative feedback branch road with described primary side loop of second time constant, and described very first time constant is greater than described second time constant, like this, the frequency response characteristic of control loop is by the resistance R 20 on the second negative feedback branch road, capacitor C 17, and first capacitor C 23, resistance R 56, R38 on the negative feedback branch road realize the adjusting of loop stability control characteristic, being provided with of these two branch road parameters, adopt the plan of establishment of constant, the first negative feedback branch road large time constant between the second negative feedback branch road hour;
Described primary side loop is provided with and is used for inductance component L 6 that described secondary DC power-supply circuit is limited, particularly, utilize the 6 pairs of output currents of inductance L on the primary side loop to limit, make output current realize the linear characteristic that increases, thereby the peak value size that realizes output current (pulse current) can be controlled;
Particularly, will be through the elementary direct current supply voltage that forms behind input filtering and the rectification circuit, be transformed into the secondary supply current powering load of isolating with the external AC power supply insulation, wherein, switching tube Q1 in the energy conversion circuit is with the switching frequency work greater than 30KHz, coil and acting that electric current flows through in the time of switching tube Q1 conducting between primary side 4～6 pin of transformer T1 (can be the high frequency transformer of frequency greater than 30KHZ) produce magnetic field energy, with the induction mode in 9～7 of primary side, produce the inductive impulse electric current on the coil between 8 pin, the secondary supply current of output behind the inductive impulse electric current process rectifying tube D2, and at output electrochemical capacitor C7, C22, the last formation of C27 energy storage direct voltage, voltage stabilizing circuit can make the secondary supply current of output, the energy storage direct voltage reaches designing requirement, in addition, in said process, there is less part energy to export the required driving voltage of auxiliary power circuit below forming on capacitor C 13 by rectifying tube D11; Use a MOSFET element as switching tube Q1, be used to produce output current (pulse current);
Control chip U3, be used for described energy conversion circuit is carried out High Power Factor control, control chip U3 can adopt the integrated control chip of APFC of pulse width modulation (PWM), pulse frequency modulated (PFM) mode, come turning on and off of driving switch pipe Q1, thereby make electric current output to the primary side loop through transformer T1, after again to load acting, reach and make the purpose of load operate as normal;
Elementary auxiliary voltage-stabilized power supply circuit, be used for a part of electric energy of described energy conversion circuit is supplied with described control chip U3, particularly, after having sub-fraction energy process rectifying tube D12 and resistance R 49 in the energy conversion circuit equally, on capacitor C 3, C9, form elementary auxiliary stabilized voltage power supply and give control chip U3 power supply;
The output controlling circuit of voltage regulation, be used for described control chip U3 is adjusted, carry out voltage stabilizing control with output voltage to power supply, particularly, after output voltage on the output controlling circuit of voltage regulation sampling capacitance C7 and the reference voltage on the diode D20 voltage stabilizing adjustment fiducial chip compare, control the output impedance size of optocoupler OC1 according to result relatively, thereby adjust the 1 pin level height of control chip U3, to adjust the ON time size of output driving pulse, make output voltage obtain the rated output voltage value, thereby make output voltage maximum within the limits prescribed, it is set at about 60V in this example;
Output current control circuit, be used for detecting the voltage of the described load that obtains according to microcomputer chip U4, by described output controlling circuit of voltage regulation described control device Q3 and inductance component L 6 are adjusted, so that the output current of power supply is controlled, particularly, can be by microcomputer chip U4 according to VBS, VBN, THS, obtain the voltage of load after the level value process software computing of CCS signal, control the high level lasting time of RELAY signal and control the output current size, and when undesired situation occurring, use RESET, the RELAY signal is done output protection, the output of RESET signal time restriction electric current for low level, RELAY signal is close current output for for low level the time; Use the action cell of the microcomputer chip U4 of monolithic integrated circuit formula as out-put supply management control;
The output auxiliary power circuit is used for another part electric energy of described energy conversion circuit is supplied with described output current control circuit;
The state display driver circuit is used for detecting the described power circuit operating state that obtains according to described microcomputer chip and shows, particularly, microcomputer chip U4 is according to the operating state of power circuit, drives the display lamp D3 demonstration that does well;
In addition, thermistor RT1 can also be installed in the temperature of sensing load on the lead-out terminal;
Implement the charger of the embodiment of the invention as shown in Figure 3, the AC network energy conversion efficiency that can significantly improve power circuit meets or exceeds 90%, energy-conserving and environment-protective more, and can realize all exporting specified pulse current in all nominal load battery voltage range; In addition, adopt time constant that the first negative feedback branch road 2023, the second negative feedback branch road 2024 of above-mentioned magnitude relationship are arranged, the power output that can improve power supply adaptor is exported higher power to more than the 120W than prior art under identical volume conditions; Adopt L6, realize the charger of real pure pulse current output.
The above is the specific embodiment of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also are considered as protection scope of the present invention.
Claims (10)
1, a kind of power circuit is characterized in that, comprising:
Input filtering and rectification circuit are used for described external AC power supply is transformed into elementary direct current supply voltage;
The energy conversion circuit is used for becoming secondary supply current that described load is powered described elementary direct current supply voltage transformation;
Control chip is used for described energy conversion circuit is carried out High Power Factor control.
2, power circuit as claimed in claim 1 is characterized in that, described energy conversion circuit comprises:
The primary side loop is used to import described elementary direct current supply voltage;
The primary side loop is used to export described secondary supply current, and,
The first negative feedback branch road with described primary side loop of very first time constant;
The second negative feedback branch road with described primary side loop of second time constant, and described very first time constant is greater than described second time constant.
3, power circuit as claimed in claim 1 or 2 is characterized in that, described power circuit also comprises:
Elementary auxiliary voltage-stabilized power supply circuit is used for a part of electric energy of described energy conversion circuit is supplied with described control chip;
The output controlling circuit of voltage regulation is used for described control chip is adjusted, and carries out voltage stabilizing control with the output voltage to power supply.
4, a kind of power supply adaptor comprises power circuit, it is characterized in that, described power circuit comprises:
Input filtering and rectification circuit are used for described external AC power supply is transformed into elementary direct current supply voltage;
The energy conversion circuit is used for becoming secondary supply current that described load is powered described elementary direct current supply voltage transformation;
Control chip is used for described energy conversion circuit is carried out High Power Factor control.
5, power supply adaptor as claimed in claim 4 is characterized in that, described energy conversion circuit comprises:
The primary side loop is used to import described elementary direct current supply voltage;
The primary side loop is used to export described secondary supply current, and,
The first negative feedback branch road with described primary side loop of very first time constant;
The second negative feedback branch road with described primary side loop of second time constant, and described very first time constant is greater than described second time constant.
6, as claim 4 or 5 described power supply adaptors, it is characterized in that described power circuit also comprises:
Elementary auxiliary voltage-stabilized power supply circuit is used for a part of electric energy of described energy conversion circuit is supplied with described control chip;
The output controlling circuit of voltage regulation is used for described control chip is adjusted, and carries out voltage stabilizing control with the output voltage to power supply.
7, a kind of charger comprises power circuit, it is characterized in that, described power circuit comprises:
Input filtering and rectification circuit are used for described external AC power supply is transformed into elementary direct current supply voltage;
The energy conversion circuit is used for becoming secondary supply current that described load is powered described elementary direct current supply voltage transformation;
Control chip is used for described energy conversion circuit is carried out High Power Factor control.
8, charger as claimed in claim 7 is characterized in that, described energy conversion circuit comprises:
The primary side loop is used to import described elementary direct current supply voltage;
The primary side loop is used to export described secondary supply current, and,
The first negative feedback branch road with described primary side loop of very first time constant;
The second negative feedback branch road with described primary side loop of second time constant, and described very first time constant is greater than described second time constant.
9, charger as claimed in claim 8 is characterized in that, described primary side loop is provided with and is used for inductance element that described secondary DC power-supply circuit is limited.
10, as each described charger in the claim 7 to 9, it is characterized in that described power circuit also comprises:
Elementary auxiliary voltage-stabilized power supply circuit is used for a part of electric energy of described energy conversion circuit is supplied with described control chip;
The output controlling circuit of voltage regulation is used for described control chip is adjusted, and carries out voltage stabilizing control with the output voltage to power supply;
Output current control circuit is used for detecting according to microcomputer chip the voltage of the described load obtain, by described output controlling circuit of voltage regulation the output current of power supply is controlled;
The output auxiliary power circuit is used for another part electric energy of described energy conversion circuit is supplied with described output current control circuit;
The state display driver circuit is used for detecting the described power circuit operating state that obtains according to described microcomputer chip and shows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009101076261A CN101567634A (en) | 2009-05-27 | 2009-05-27 | Electric power circuit, power adapter and charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009101076261A CN101567634A (en) | 2009-05-27 | 2009-05-27 | Electric power circuit, power adapter and charger |
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| Publication Number | Publication Date |
|---|---|
| CN101567634A true CN101567634A (en) | 2009-10-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2009101076261A Pending CN101567634A (en) | 2009-05-27 | 2009-05-27 | Electric power circuit, power adapter and charger |
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| CN (1) | CN101567634A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110308322A (en) * | 2019-06-29 | 2019-10-08 | 杭州涂鸦信息技术有限公司 | A method of calculating power supply adaptor electricity |
| WO2019205548A1 (en) * | 2018-04-26 | 2019-10-31 | 广东美的厨房电器制造有限公司 | Power supply apparatus and microwave cooking electric appliance |
-
2009
- 2009-05-27 CN CNA2009101076261A patent/CN101567634A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019205548A1 (en) * | 2018-04-26 | 2019-10-31 | 广东美的厨房电器制造有限公司 | Power supply apparatus and microwave cooking electric appliance |
| CN110308322A (en) * | 2019-06-29 | 2019-10-08 | 杭州涂鸦信息技术有限公司 | A method of calculating power supply adaptor electricity |
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Open date: 20091028 |