CN101826795A - Power conversion device and method - Google Patents
Power conversion device and method Download PDFInfo
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- CN101826795A CN101826795A CN200910118128A CN200910118128A CN101826795A CN 101826795 A CN101826795 A CN 101826795A CN 200910118128 A CN200910118128 A CN 200910118128A CN 200910118128 A CN200910118128 A CN 200910118128A CN 101826795 A CN101826795 A CN 101826795A
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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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Abstract
The invention relates to a power conversion device and method, wherein the power conversion device is used for supplying output voltage to a load and comprises a detection module and a control module, wherein the detection module detects the connection status of the power conversion device and the load and generates a detection signal according to the connection status; the control module is coupled with the detection module and receives the detection signal; when the detection signal corresponds to a connection status, the output voltage is increased to a rated voltage value; and when the detection signal corresponds to a non-connection status, the output voltage is reduced to a base voltage value.
Description
Technical field
The present invention is about a kind of power supply change-over device and method, particularly a kind of energy-conservation and the power supply change-over device and the method that improve power-efficient.
Background technology
Science and technology is showing improvement or progress day by day, and electronic product is constantly weeded out the old and bring forth the new to the mankind bring life more easily, wherein cooperates modern's use habit, and portable electronic product comes into one's own day by day.Because portable electronic product has portability (portable), mobility characteristics such as (mobile), therefore can satisfy user's demand.That is to say that portable electronic product is not subjected to the restriction in place, can allow the user use whenever and wherever possible.Therefore, portable electronic product provides power source with battery mostly, provides the power supply of required by electronic product by power supply adaptor (adaptor) or the also convertible supply socket of mains charger (charger) in addition, and can charge to battery.
So under the extensive use of portable electronic product, the use of power supply adaptor or mains charger is also extensive day by day.Therefore, the delivery efficiency of power supply adaptor or mains charger also comes into one's own day by day with the unloaded power that is consumed.The particularly unloaded power that is consumed owing to can't be utilized fully, has therefore caused the waste of the energy.
Yet, power supply adaptor traditionally or mains charger, and though output have non-loaded be connected, its output voltage is all fixed value.That is to say, when power supply adaptor or mains charger with after supply socket links to each other, even the power supply out splice going splice does not insert portable electronic product, for example: when mobile phone, PDA(Personal Digital Assistant) or notebook computer, the out-put supply of power supply adaptor or mains charger still is specified output valve.So, will make the inside of power supply adaptor or mains charger produce power consumption, thereby increase the power that is consumed when unloaded.
Summary of the invention
The present invention proposes a kind of power supply change-over device, and in order to provide output voltage to load, this power supply change-over device comprises: detecting module and control module.The connection status of detecting module detecting power supply change-over device and load produces detection signal according to connection status.Control module is coupled to detecting module and receives detection signal, when the connection status of detection signal correspondence when connecting, promote output voltage to load voltage value, when the connection status of detection signal correspondence when not connecting, the reduction output voltage is to the basic voltage value.
The present invention also proposes a kind of power conversion method, provides output voltage to load by power supply change-over device, comprises the following step: the connection status of detecting power supply change-over device and load, and according to connection status generation detection signal; Receive detection signal; When the connection status of detection signal correspondence when connecting, promote output voltage to load voltage value; When the connection status of detection signal correspondence when not connecting, reduce output voltage to the basic voltage value.
The present invention also proposes a kind of power supply change-over device, and in order to provide output voltage to load, this power supply change-over device comprises: switch, impedance, bleeder circuit, signal generating circuit and control circuit.The connection status of switch detecting power supply change-over device and load.Impedance coupling produces detection signal in switch according to connection status.Bleeder circuit is coupled to impedance, produces dividing potential drop according to output voltage and detection signal.Signal generating circuit is coupled to bleeder circuit, produces control signal according to dividing potential drop.Control circuit receives and adjusts the magnitude of voltage of output voltage according to control signal, when connection status when connecting, adjustments output voltage is a load voltage value, when connection status when not connecting, the adjustment output voltage is the basic voltage value that is lower than rated voltage.
By power supply change-over device proposed by the invention or conversion method, by the connection status of detecting power supply change-over device and load, change the output voltage of power supply change-over device again according to connection status, so can reach purpose energy-conservation and the raising power-efficient.
Relevant preferred embodiment of the present invention and effect thereof, conjunction with figs. explanation now as after.
Description of drawings
Fig. 1 is the calcspar of power supply change-over device one embodiment of the present invention;
Fig. 2 is the circuit diagram of power supply change-over device one embodiment of the present invention;
Fig. 3 is the flow chart of power conversion method of the present invention.
Embodiment
Please refer to Fig. 1, the calcspar of power supply change-over device one embodiment in the present embodiment shown in this figure.Power supply change-over device 1 is in order to providing output voltage to load 2, and the characteristics of power supply change-over device 1 proposed by the invention are wherein detecting module 10 and 20 two elements of control module.Moreover the alleged power supply change-over device 1 of the present invention can be power supply adaptor (adaptor) or mains charger (charger).
In this, the element that general power supply change-over device 1 has is described earlier, and at first power supply change-over device 1 receives input voltage, can be alternating current in this input voltage, earlier through electromagnetic interference filter circuit A1 in order to the filtering electromagnetic interference (electromagnetic interference, EMI).The input voltage that will belong to alternating current afterwards is by rectification circuit A2, and carrying out the action of rectification, and rectification circuit A2 can be full-wave rectifier.Then, revise the power factor (PF) (power factor) of power supply, and be more than 75 watts the time at the power of power supply change-over device 1 usually, just need carry out the correction of power factor (PF) by power factor modifying circuit A3.Be sent to the magnitude of voltage of transformer A5 by switch crystal A4 control, by transformer A5 the magnitude of voltage of input be converted to the required magnitude of voltage of rear end load 2 again.Voltage after the transformer A5 conversion carries out the filtering action earlier through current rectifying and wave filtering circuit A6 with the voltage after the rectification, gives load 2 via voltage-regulating circuit A7 to export stable output voltage more at last.
The present invention proposes the detecting modules 10 that increase in power supply change-over device 1 more, is used for detecting the connection status of power supply change-over device 1 and load 2, and produces detection signal according to connection status.
Control module 20 is coupled to detecting module 10, and receives the detection signal that detecting module 10 is produced.When the pairing connection status of detection signal when connecting, control module 20 will promote output voltage to load voltage value.Relative, when the pairing connection status of detection signal when not connecting, control module 20 will reduce output voltage to the basic voltage value.
Illustrate, suppose that power supply change-over device 1 is the used power supply adaptor of general notebook computer, its specification mostly for 220 volts alternating current (supply socket) is converted to 19 volts direct current, is given notebook computer to provide.At this moment, when power supply change-over device 1 with after supply socket is connected, whether the power supply out splice going splice that detecting module 10 just can be detected power supply change-over device 1 is connected to each other with load 2 (also being notebook computer).In this, connection status can be divided into two kinds of situations, first kind of situation is that power supply change-over device 1 is connected with load 2, expression load 2 needs to use power supply change-over device 1 to transmit power supply, load 2 work to be provided or to charge used, this moment, control module 20 just can improve the normal load voltage value (is 19 volts in this embodiment) of output voltage to, for the required magnitude of voltage of load 2 work.
Second kind of situation is that power supply change-over device 1 is not connected with load 2, and expression load 2 does not also need power supply change-over device 1 to transmit power supply, load 2 work to be provided or to charge used.This moment, control module 20 just can reduce the output electricity to a basic voltage value, reduced the purpose of power consumption in the time of so can reaching zero load.
General power supply change-over device 1 all has power supply indicator, for example: the power supply adaptor that notebook computer is used has a LED, when power supply adaptor links to each other with supply socket, LED just can light, accepted to import power supply in order to indication, but and above-mentioned basic voltage value can be the magnitude of voltage that the normal operation of the power supply indicator of power supply change-over device 1 is provided.That is to say, when detecting power supply change-over device, detecting module 10 do not connect load 2, control module 20 reduces output voltage in order to reduce power consumption, the invention provides an embodiment, but the power supply indicator that output voltage can be reduced to power supply change-over device 1 magnitude of voltage of normal operation still.
Please refer to the circuit diagram of Fig. 2 for power supply change-over device one embodiment.Control module 20 comprises: bleeder circuit 22, signal generating circuit 24 and control circuit 26.By as can be known shown in Figure 2, bleeder circuit 22 is arranged at the output voltage terminal of transformer A5, is called the secondary side of transformer A5 in this, and produces dividing potential drop according to output voltage by two resistance R 1, R2 being comprised in the bleeder circuit 22.
Please continue with reference to Fig. 2, detecting module 10 comprises impedance 12 and switch 14.As shown in the figure, an embodiment of switch 14 is the PMOS transistor switch, but not as limit.Switch 14 is coupled to impedance 12, and is come the conducting of control switch 14 or opened circuit by connection status.Wherein, the conducting of switch 14 or open circuit will make between impedance 12 and the bleeder circuit 22 to conducting or open circuit, and then can adjust the dividing potential drop of bleeder circuit 22.
Illustrate, suppose that power supply change-over device 1 is the used power supply adaptor of general notebook computer, power supply adaptor is except having the plug that is connected usefulness with supply socket, also have the power supply out splice going splice in order to being connected, and provide the power supply after the conversion to give notebook computer with notebook computer (that is load 2).Wherein, general power supply out splice going splice has a control pin, and when the power supply out splice going splice linked to each other with notebook computer, this control pin presented ground state, and the present invention utilizes these characteristics to carry out the control of follow-up output voltage.
By as can be known shown in Figure 2, the grid of switch 14 is controlled by connection status, the grid of switch 14 can be connected to above-mentioned control pin in this.Therefore, when power supply change-over device 1 was connected with load 2, causing this control pin was ground state, made the grid of switch 14 follow ground connection, thereby allowed switch 14 conductings.When switch 14 conductings,, thereby cause the dividing potential drop of resistance R 2 in the bleeder circuit 22 to diminish with the resistance R 2 mutual (both diminish at the parallel resistance value) in parallel that makes in impedance 12 and the bleeder circuit 22.At this moment, the energy of optical coupler 241 can diminish because of dividing potential drop reduces in the signal generating circuit 24, therefore will make optical coupler 242 received energy also diminish, that is to say, the control signal that signal generating circuit 24 is produced at this moment, representing the dividing potential drop that obtains according to output voltage is situation about diminishing.After control circuit 26 receives the control signal that diminishes of expression dividing potential drop,, therefore just output voltage can be heightened in order to keep the stable of output voltage.In this, can set the resistance value of resistance R 1, resistance R 2 and impedance 12 in advance, be load voltage value and make control circuit 26 that output voltage is promoted.
Another kind of situation, when power supply change-over device 1 was not connected as yet with load 2, the grid of switch 14 was earth-free with making, thereby allowed switch 14 present to open circuit.When switch 14 opens circuit, open circuit making impedance 12 and resistance R 2 in the bleeder circuit 22 also present, thereby cause the dividing potential drop of resistance R 2 in the bleeder circuit 22 to become big relatively.At this moment, the energy of optical coupler 241 can become big because of dividing potential drop raises in the signal generating circuit 24, therefore will make optical coupler 242 received energy also become big, that is to say, the control signal that signal generating circuit 24 is produced is at this moment representing the dividing potential drop that obtains according to output voltage for becoming big situation.After control circuit 26 receives the big control signal of expression dividing potential drop change,, therefore just output voltage can be reduced in order to keep the stable of output voltage.In this, can pass through to set in advance the resistance value of resistance R 1, resistance R 2 and impedance 12 equally, and make control circuit 26 that output voltage is reduced to the basic voltage value.
Please refer to Fig. 3, this figure is depicted as the flow chart of power conversion method, provides output voltage to load by power supply change-over device, comprises the following step.
Step S10: the connection status of detecting power supply change-over device and load, and according to connection status generation detection signal;
Step S20: receive detection signal;
Step S30: when the connection status of detection signal correspondence when connecting, promote output voltage to load voltage value;
Step S40: when the connection status of detection signal correspondence when not connecting, reduce output voltage to the basic voltage value;
Above-mentioned steps S30 and step S40 are the correlation step of control output voltage, can comprise the following step in this: according to output voltage, produce dividing potential drop; According to dividing potential drop, produce control signal; According to control signal, adjust the magnitude of voltage of output voltage.
In addition, the connection status that can be detected according to step S10 is come control switch, and according to the conducting of switch or open circuit, and then adjust above-mentioned dividing potential drop.
Though technology contents of the present invention with preferred embodiment openly as above; right its is not in order to limit the present invention; anyly be familiar with this technical staff; do not breaking away from spirit of the present invention a little change and the retouching done; all should be covered by in protection scope of the present invention, so protection scope of the present invention is when being as the criterion according to the content that claims defined.
Claims (11)
1. a power supply change-over device in order to provide output voltage to load, is characterized in that, above-mentioned power supply change-over device comprises:
Detecting module, the connection status of detecting power supply change-over device and above-mentioned load produces detection signal according to above-mentioned connection status; And
Control module, be coupled to above-mentioned detecting module, the above-mentioned connection status that receives detection signal that above-mentioned detecting module sends and above-mentioned detection signal correspondence when above-mentioned control module is when connecting, promote above-mentioned output voltage to load voltage value, when the above-mentioned connection status of above-mentioned detection signal correspondence when not connecting, reduce above-mentioned output voltage to the basic voltage value.
2. power supply change-over device according to claim 1, it is characterized in that, above-mentioned control module comprises bleeder circuit, signal generating circuit and control circuit, above-mentioned bleeder circuit produces dividing potential drop according to above-mentioned output voltage, above-mentioned signal generating circuit couples above-mentioned bleeder circuit and controls signal to above-mentioned control circuit according to above-mentioned dividing potential drop generation, adjusts the magnitude of voltage of above-mentioned output voltage.
3. power supply change-over device according to claim 2 is characterized in that above-mentioned signal generating circuit comprises optical coupler.
4. power supply change-over device according to claim 2 is characterized in that, above-mentioned detecting module comprises:
Impedance; And
Switch is coupled to above-mentioned impedance, is controlled by above-mentioned connection status, makes between above-mentioned impedance and the above-mentioned bleeder circuit to conducting or opens circuit, and adjust the above-mentioned dividing potential drop of above-mentioned bleeder circuit.
5. a power conversion method provides output voltage to load by power supply change-over device, it is characterized in that, comprises the following step:
The connection status of detecting power supply change-over device and above-mentioned load, and according to above-mentioned connection status generation detection signal;
Receive above-mentioned detection signal;
When the above-mentioned connection status of above-mentioned detection signal correspondence when connecting, promote above-mentioned output voltage to load voltage value; And
When the above-mentioned connection status of above-mentioned detection signal correspondence when not connecting, reduce above-mentioned output voltage to the basic voltage value.
6. power conversion method according to claim 5 is characterized in that, promotes or reduce the step of above-mentioned output voltage, comprises:
According to above-mentioned output voltage, produce dividing potential drop;
According to above-mentioned dividing potential drop, produce control signal; And
According to above-mentioned control signal, adjust the magnitude of voltage of above-mentioned output voltage.
7. power conversion method according to claim 6 is characterized in that, also comprises the following step:
According to above-mentioned connection status, control switch; And
According to the conducting of above-mentioned switch or open circuit, adjust above-mentioned dividing potential drop.
8. a power supply change-over device in order to provide output voltage to load, is characterized in that, above-mentioned power supply change-over device comprises:
Switch, the connection status of detecting power supply change-over device and above-mentioned load;
Impedance is coupled to above-mentioned switch, produces detection signal according to above-mentioned connection status;
Bleeder circuit is coupled to above-mentioned impedance, produces dividing potential drop according to above-mentioned output voltage and above-mentioned detection signal;
Signal generating circuit is coupled to above-mentioned bleeder circuit, produces control signal according to above-mentioned dividing potential drop; And
Control circuit, receive and adjust the magnitude of voltage of above-mentioned output voltage according to above-mentioned control signal, when above-mentioned connection status is connection, adjusting above-mentioned output voltage is load voltage value, when above-mentioned connection status when not connecting, adjusting above-mentioned output voltage is the basic voltage value that is lower than above-mentioned rated voltage.
9. power supply change-over device according to claim 8 is characterized in that, controls between above-mentioned impedance and the above-mentioned bleeder circuit according to above-mentioned detection signal to be conducting or to open circuit, and changes the resistance value of above-mentioned bleeder circuit.
10. power supply change-over device according to claim 9 is characterized in that, according to the above-mentioned resistance value of above-mentioned bleeder circuit, and adjusts the above-mentioned dividing potential drop of above-mentioned bleeder circuit.
11. power supply change-over device according to claim 8 is characterized in that, above-mentioned signal generating circuit comprises optical coupler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101181287A CN101826795B (en) | 2009-03-02 | 2009-03-02 | Power conversion device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101181287A CN101826795B (en) | 2009-03-02 | 2009-03-02 | Power conversion device and method |
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| CN101826795A true CN101826795A (en) | 2010-09-08 |
| CN101826795B CN101826795B (en) | 2013-06-19 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102419626A (en) * | 2010-09-27 | 2012-04-18 | 和硕联合科技股份有限公司 | Computer system, power supply and power supply management method thereof |
| CN102594162A (en) * | 2011-01-13 | 2012-07-18 | 华硕电脑股份有限公司 | Power supply device and power supply control method thereof |
| CN102801320A (en) * | 2011-05-24 | 2012-11-28 | 华硕电脑股份有限公司 | Power supply |
| CN110557264A (en) * | 2019-09-18 | 2019-12-10 | 深圳市三亿电气科技有限公司 | method, device and system for managing safe power utilization |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2583854Y (en) * | 2002-10-15 | 2003-10-29 | 睿阳科技股份有限公司 | Protective circuit of intelligent electronic device |
| CN1329797C (en) * | 2004-06-30 | 2007-08-01 | 技嘉科技股份有限公司 | Switching power supply system and its method for automatic regulating circuit work power |
| CN101355256B (en) * | 2008-06-04 | 2013-04-17 | 李幸 | Electric power system for power adapter |
-
2009
- 2009-03-02 CN CN2009101181287A patent/CN101826795B/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102419626A (en) * | 2010-09-27 | 2012-04-18 | 和硕联合科技股份有限公司 | Computer system, power supply and power supply management method thereof |
| CN102594162A (en) * | 2011-01-13 | 2012-07-18 | 华硕电脑股份有限公司 | Power supply device and power supply control method thereof |
| CN102801320A (en) * | 2011-05-24 | 2012-11-28 | 华硕电脑股份有限公司 | Power supply |
| US9013897B2 (en) | 2011-05-24 | 2015-04-21 | Asustek Computer Inc. | Power supply |
| CN110557264A (en) * | 2019-09-18 | 2019-12-10 | 深圳市三亿电气科技有限公司 | method, device and system for managing safe power utilization |
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| Publication number | Publication date |
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| CN101826795B (en) | 2013-06-19 |
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