CN101826795B - Power conversion device and method - Google Patents
Power conversion device and method Download PDFInfo
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- CN101826795B CN101826795B CN2009101181287A CN200910118128A CN101826795B CN 101826795 B CN101826795 B CN 101826795B CN 2009101181287 A CN2009101181287 A CN 2009101181287A CN 200910118128 A CN200910118128 A CN 200910118128A CN 101826795 B CN101826795 B CN 101826795B
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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 power supply change-over device and method with improving 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 as the mankind bring life more easily, wherein coordinates modern's use habit, and portable electronic product comes into one's own day by day.Have the characteristics such as portability (portable), mobility (mobile) due to portable electronic product, therefore can satisfy user's demand.That is to say, 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 mainly with battery greatly, provide the power supply of required by electronic product by power supply adaptor (adaptor) or mains charger (charger) also convertible supply socket in addition, and can charge to battery.
Therefore under the extensive use of portable electronic product, the use of power supply adaptor or mains charger is also increasingly extensive.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 consumes.Particularly the unloaded power that consumes, owing to can't being utilized fully, 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 is connected, even the power supply out splice going splice does not insert portable electronic product, for example: when mobile phone, personal digital assistant (PDA) or notebook computer, the out-put supply of power supply adaptor or mains charger is still specified output valve.So, will make the inside of power supply adaptor or mains charger produce power consumption, thereby increase the power that consumes 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 connecting, promotes output voltage to load voltage value when connection status corresponding to detection signal, and when not connecting, the reduction output voltage is to the basic voltage value when connection status corresponding to detection signal.
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 produce detection signal according to connection status; Receive detection signal; When connecting, promote output voltage to load voltage value when connection status corresponding to detection signal; When not connecting, reduce output voltage to the basic voltage value when connection status corresponding to detection signal.
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 according to control signal the magnitude of voltage of output voltage, and when connecting, adjustments output voltage is load voltage value when connection status, and when not connecting, the adjustment output voltage is the basic voltage value lower than rated voltage when connection status.
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, then change the output voltage of power supply change-over device 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 hereby coordinate description of drawings such as rear.
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 first is described, at first power supply change-over device 1 receives input voltage, can be alternating current in this input voltage, first pass through electromagnetic interference filter circuit A1 in order to filtering electromagnetic interference (electromagnetic interference, EMI).The input voltage that will belong to afterwards alternating current 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 by power factor modifying circuit A3, 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).Control the magnitude of voltage that is sent to transformer A5 by switch crystal A4, then by transformer A5, the magnitude of voltage of inputting is converted to the required magnitude of voltage of rear end load 2.Voltage after transformer A5 conversion first passes through current rectifying and wave filtering circuit A6, and the voltage after rectification is carried out the filtering action, last again via voltage-regulating circuit A7 with the output voltage of stable output to load 2.
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.
Illustrate, suppose that power supply change-over device 1 is general notebook computer power supply adaptor used, its specification mostly for the alternating current (supply socket) of 220 volts is converted to the direct current of 19 volts, is given notebook computer to provide.At this moment, 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) when power supply change-over device 1.In this, connection status can be divided into two kinds of situations, the first 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 (being 19 volts in this embodiment) of output voltage to, for the load 2 required magnitudes of voltage of work.
Second case 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 is connected with supply socket, LED just can light, accepted input power 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 that Fig. 2 is 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 comprising in 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 bleeder circuit 22 as conducting or open circuit, and then the dividing potential drop of capable of regulating bleeder circuit 22.
Illustrate, suppose that power supply change-over device 1 is general notebook computer power supply adaptor used, power supply adaptor is except having the plug that is connected use with supply socket, also have the power supply out splice going splice in order to being connected with notebook computer (that is load 2), and provide the power supply after conversion to give notebook computer.Wherein, general power supply out splice going splice has one and controls pin, and when the power supply out splice going splice was connected 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 conducting, with the resistance R 2 mutual (both diminish at the parallel resistance value) in parallel that makes in impedance 12 and bleeder circuit 22, thereby cause the dividing potential drop of resistance R 2 in bleeder circuit 22 to diminish.At this moment, in signal generating circuit 24, the energy of optical coupler 241 can diminish because dividing potential drop reduces, therefore will make the received energy of optical coupler 242 also diminish, that is to say, the control signal that signal generating circuit 24 produces is at this moment representing that 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, in order to keep the stable of output voltage, therefore just output voltage can be heightened.In this, can set in advance the resistance value of resistance R 1, resistance R 2 and impedance 12, and make control circuit 26 that output voltage is promoted to load voltage value.
Another kind of situation, when power supply change-over device 1 not yet was connected 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 bleeder circuit 22 also present, thereby cause the dividing potential drop of resistance R 2 in bleeder circuit 22 relatively to become large.At this moment, in signal generating circuit 24, the energy of optical coupler 241 can become large because dividing potential drop raises, therefore will make the received energy of optical coupler 242 also become large, that is to say, the control signal that signal generating circuit 24 produces is at this moment representing that the dividing potential drop that obtains according to output voltage is for becoming large situation.After control circuit 26 receives the large control signal of expression dividing potential drop change, in order to keep the stable of output voltage, therefore just output voltage can be reduced.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 produce detection signal according to connection status;
Step S20: receive detection signal;
Step S30: when connecting, promote output voltage to load voltage value when connection status corresponding to detection signal;
Step S40: when not connecting, reduce output voltage to the basic voltage value when connection status corresponding to detection signal;
Above-mentioned steps S30 and step S40 can comprise the following step for controlling the correlation step of output voltage 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 detect 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.
Although technology contents of the present invention with preferred embodiment openly as above; so it is not 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 the content that protection scope of the present invention ought define according to claims is as the criterion.
Claims (7)
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, above-mentioned detecting module comprises impedance and switch, wherein above-mentioned switch is coupled to above-mentioned impedance, is controlled by above-mentioned connection status, switches on conducting or off state; And
control module, be coupled to above-mentioned detecting module, described control module comprises bleeder circuit, above-mentioned bleeder circuit is according to the conducting of above-mentioned switch or open circuit, and form conducting between above-mentioned impedance or open circuit, and produce and adjust dividing potential drop according to above-mentioned output voltage, when above-mentioned control module receives detection signal that above-mentioned detecting module sends and above-mentioned connection status corresponding to above-mentioned detection signal when connecting, promote above-mentioned output voltage to load voltage value, when above-mentioned connection status corresponding to above-mentioned detection signal 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 signal generating circuit and control circuit, above-mentioned signal generating circuit couples above-mentioned bleeder circuit and produces according to above-mentioned dividing potential drop and controls signal to above-mentioned control circuit, 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. 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 according to above-mentioned control signal the magnitude of voltage of above-mentioned output voltage, when above-mentioned connection status is connection, adjusting above-mentioned output voltage is load voltage value, when not connecting, adjust above-mentioned output voltage and be the basic voltage value lower than above-mentioned rated voltage when above-mentioned connection status.
5. power supply change-over device according to claim 4, is characterized in that, to control between above-mentioned impedance and above-mentioned bleeder circuit be conducting or open circuit according to above-mentioned detection signal, and change the resistance value of above-mentioned bleeder circuit.
6. power supply change-over device according to claim 5, 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.
7. power supply change-over device according to claim 4, is characterized in that, above-mentioned signal generating circuit comprises optical coupler.
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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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| CN2009101181287A CN101826795B (en) | 2009-03-02 | 2009-03-02 | Power conversion device and method |
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| CN101826795A CN101826795A (en) | 2010-09-08 |
| CN101826795B true CN101826795B (en) | 2013-06-19 |
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Families Citing this family (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 |
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| CN2583854Y (en) * | 2002-10-15 | 2003-10-29 | 睿阳科技股份有限公司 | Protective circuit of intelligent electronic device |
| CN1716160A (en) * | 2004-06-30 | 2006-01-04 | 技嘉科技股份有限公司 | Switching power supply system and its method for automatic regulating circuit work power |
| CN101355256A (en) * | 2008-06-04 | 2009-01-28 | 李幸 | Electric power system for power adapter capable of intelligent dormancy and awakening |
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2009
- 2009-03-02 CN CN2009101181287A patent/CN101826795B/en active Active
Patent Citations (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 |
| CN1716160A (en) * | 2004-06-30 | 2006-01-04 | 技嘉科技股份有限公司 | Switching power supply system and its method for automatic regulating circuit work power |
| CN101355256A (en) * | 2008-06-04 | 2009-01-28 | 李幸 | Electric power system for power adapter capable of intelligent dormancy and awakening |
Non-Patent Citations (1)
| Title |
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