CN104184304B - A kind of method for power conversion and device - Google Patents

A kind of method for power conversion and device Download PDF

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Publication number
CN104184304B
CN104184304B CN201310198395.6A CN201310198395A CN104184304B CN 104184304 B CN104184304 B CN 104184304B CN 201310198395 A CN201310198395 A CN 201310198395A CN 104184304 B CN104184304 B CN 104184304B
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power
output
input voltage
conversion
voltage
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CN104184304A (en
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王婷婷
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Lenovo Beijing Ltd
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Lenovo Beijing Ltd
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Abstract

The invention discloses a kind of method for power conversion and device, and the present invention relates to electronic technology field, more particularly to a kind of method for power conversion and device, methods described to include:What detection was input to the power conversion device changes input voltage as the first input voltage;Based on the corresponding relation between input voltage and power output, the conversion power output for determining the power conversion device is the first power output corresponding with first input voltage;Based on first input voltage, export first power output, solve the technical problem that power supply adaptor presence in the prior art can only support a kind of power supply for exporting certain power to be charged, realize the technique effect that power supply adaptor can support the power supply of a variety of different output powers to be charged.

Description

A kind of method for power conversion and device
Technical field
The present invention relates to electronic technology field, more particularly to a kind of method for power conversion and device.
Background technology
With the progress and development of science and technology, application of the electronic equipment in the life of people is increasingly extensive, such as:People can be with Conversed using mobile phone, game machine can be used to play game, and people can be by light and handy portable notebook computer Carry with, for work and leisure etc., because in real life, electronic device often not directly uses household power , because used in family being 220 volts of supply voltage, and the commonly required supply voltage of universal electronic product is 5 volts To 20 volts or so, so the electronic equipment during we live just be unable to do without corresponding power supply adaptor.The effect of power supply adaptor It is the low-voltage that the high voltage of family is converted into workable stabilization, enables their normal works.And without that will be given if it We bring many inconvenience at daily use.
With the continuous renewal of electronic equipment and being continuously increased for electronic equipment species, have on the market now increasing Large power supply adapter, with different power supplys our electronic equipment can be given to charge, such as:Can be inserted on automobile to Notebook charges, and can also insert and be charged aboard to notebook.But found during use, because aircraft and automobile Requirement to power output is different, and some power supply adaptors can be with electron equipment charge, but aboard but on automobile Electron equipment charge is unable to, as the direct current jack fan-out capability on aircraft only has 75W, if it exceeds 75W will trigger insurance Silk action.
But present inventor has found above-mentioned technology extremely during inventive technique scheme in realizing the embodiment of the present application Following technical problem less be present:
User is when using power supply adaptor electron equipment charge, because power supply adaptor of the prior art can only carry For a kind of power output, so power supply adaptor presence of the prior art can only support a kind of power supply for exporting certain power to enter The technical problem of row charging.
Further, because power supply adaptor of the prior art can only provide a kind of power output, and in power adaptation Device, which is connected to after different electrical power, can not use, so power output to be present single for power supply adaptor of the prior art, it is general The relatively low technical problem of property.
The content of the invention
The embodiment of the present application solves power supply adaptor in the prior art by providing a kind of method for power conversion and device In the presence of the technical problem that can only support that a kind of power supply for exporting certain power is charged, realizing power supply adaptor can support The technique effect that the power supply of a variety of different output powers is charged.
The embodiment of the present application provides a kind of method for power conversion, applied in a power conversion device, methods described bag Include:
What detection was input to the power conversion device changes input voltage as the first input voltage;
Based on the corresponding relation between input voltage and power output, the conversion power output of the power conversion device is determined For the first power output corresponding with first input voltage;
Based on first input voltage, first power output is exported.
Further, it is described detect be input to the power conversion device change input voltage as the first input voltage, Specially:
The conversion of the power conversion device is input to by the voltage detecting circuit detection in the power conversion device Input voltage is the first input voltage.
Further, the voltage detecting circuit specifically includes:
First resistor, including first end and the second end, wherein, the first end and the input electricity of the power conversion device Road is connected, and second end is connected with the first interface of the power conversion device;
Second resistance, including the 3rd end and the 4th end, wherein, the 3rd end ground connection, the 4th end and described first Interface connects;
Voltage comparator, including the first positive pole and the first negative pole, first positive pole is connected with the first interface, described First negative pole is connected with the first reference power supply.
Further, the voltage detecting circuit detection by the power conversion device is input to the power and turned Changing device changes input voltage as the first input voltage, specifically includes:
First positive pole obtains the first voltage to be compared from the first power power supply to be converted, and first negative pole is from described First reference power supply obtains the first normal voltage;
By the described first voltage to be compared compared with first normal voltage, the first comparative result is obtained;
When first comparative result shows that the first normal voltage described in the described first voltage ratio to be compared is big, the electricity The first default high level of comparator output is pressed, now, the described first default high level is first input voltage;
Show the first normal voltage hour, the electricity described in the described first voltage ratio to be compared in first comparative result The first default low level of comparator output is pressed, now, the described first default low level is first input voltage.
Further, the corresponding relation based between input voltage and power output, determines the power conversion device Conversion power output be the first power output corresponding with first input voltage, be specially:
Based on the corresponding relation between input voltage and power output, by the power conversion device with the voltage Detection circuit connection output current control circuit determine the conversion power output of the power conversion device be with it is described first defeated Enter the first power output corresponding to voltage.
Further, the output current control circuit specifically includes:
3rd resistor, including the 5th end and the 6th end, the 5th end and the power conversion device and described first The different second interface connection of interface;
4th resistance, including the 7th end and the 8th end, the 7th end are connected with the second interface, the 8th termination Ground;
5th resistance, including the 9th end and the tenth end, the 9th end are connected with the second reference power supply, the tenth end with The second interface connection;
First switch, including the tenth one end and the 12nd end, described tenth one end and the six end connecting, the described tenth Two ends are grounded;
First current comparator, including the second positive pole and the second negative pole, second positive pole and the power conversion device The connection of the first current arrester, second negative pole is connected with the second interface;
First control module, including the 13rd end and the 14th end, the 13rd end and first current comparator Connection, the 14th end is connected with the power output circuit in the power conversion device.
Further, the corresponding relation based between input voltage and power output, passes through the power conversion device In the conversion power output that output current control circuit is connected with the voltage detecting circuit and determines the power conversion device For the first power output corresponding with first input voltage, specifically include:
Second negative pole obtains the first normalized current from first reference power supply, and second positive pole is from described first Current amplifier obtains the first electric current to be compared;
Compare first normalized current and first electric current to be compared, obtain the second comparative result;
Based on second comparative result, first current comparator exports the first electric current to the described first control mould Block;
Based on first electric current, first control module produces the first control instruction;
First control instruction is performed, to determine the conversion power output of the power conversion device as with described first First power output corresponding to input voltage.
Further, described to be based on second comparative result, first current comparator exports the first electric current to institute The first control module is stated, is specifically included:
When second comparative result shows that the described first electric current to be compared is bigger than first normalized current, described One current comparator exports the first predetermined current, and now, first predetermined current is first electric current;
Show the described first electric current to be compared than the first normalized current hour in second comparative result, described One current comparator exports the second predetermined current, and now, second predetermined current is first electric current.
Further, it is described to be based on first input voltage, first power output is exported, is specially:
Based on first input voltage, by connecting in the power conversion device with the output current control circuit The power output circuit connect exports first power output.
Further, the power output circuit specifically includes:
6th resistance, including the 15th end and the 16th end, the 15th end and the input of the power conversion device Circuit connects, and the 16th end threeth interface different with first and second described interface from the power conversion device connects Connect;
7th resistance, including the 17th end and the 18th end, the 17th end are connected with the 3rd interface, and described 18 ends are connected with the output circuit of the power conversion device;
Second switch, it is connected with the 14th end, the second switch includes the 19th end and the 20th end, and described 19 ends are connected with the 15th end, and 20 end is connected with the 3rd interface.
Further, it is described to be based on first input voltage, by the power conversion device with the output The power output circuit of current control circuit connection exports first power output, specifically includes:
Based on first input voltage, first control module produces the first control instruction;
By performing first control instruction, control the second switch in an ON state or off-state;
When the second switch is in the on-state constantly, the 7th resistance produces the second electric current;
Based on second electric current, the power output circuit exports first power output;
When the second switch is in the off-state, the 7th resistance produces the 3rd electric current;
Based on the 3rd electric current, the power output circuit exports first power output.
On the other hand, the embodiment of the present application provides a kind of power conversion device, including:
Voltage detecting circuit, the input voltage of changing that the power conversion device is input to for detecting input electricity into first Pressure;
Output current control circuit, it is connected with the voltage detecting circuit, for based between input voltage and power output Corresponding relation, determine that the conversion power output of the power conversion device is defeated for corresponding with first input voltage first Go out power;
Power output circuit, it is connected with the output current control circuit, for based on first input voltage, output First power output.
Wherein, the voltage detecting circuit specifically includes:
First resistor, including first end and the second end, wherein, the first end and the input electricity of the power conversion device Road is connected, and second end is connected with the first interface of the power conversion device;
Second resistance, including the 3rd end and the 4th end, wherein, the 3rd end ground connection, the 4th end and described first Interface connects;
Voltage comparator, including the first positive pole and the first negative pole, first positive pole is connected with the first interface, described First negative pole is connected with the first reference power supply.
Wherein, the output current control circuit specifically includes:
3rd resistor, including the 5th end and the 6th end, the 5th end and the power conversion device and described first The different second interface connection of interface;
4th resistance, including the 7th end and the 8th end, the 7th end are connected with the second interface, the 8th termination Ground;
5th resistance, including the 9th end and the tenth end, the 9th end are connected with the second reference power supply, the tenth end with The second interface connection;
First switch, including the tenth one end and the 12nd end, described tenth one end and the six end connecting, the described tenth Two ends are grounded;
First current comparator, including the second positive pole and the second negative pole, second positive pole and the power conversion device The connection of the first current arrester, second negative pole is connected with the second interface;
First control module, including the 13rd end and the 14th end, the 13rd end and first current comparator Connection, the 14th end is connected with the power output circuit in the power conversion device.
Wherein, the power output circuit specifically includes:
6th resistance, including the 15th end and the 16th end, the 15th end and the input of the power conversion device Circuit connects, and the 16th end threeth interface different with first and second described interface from the power conversion device connects Connect;
7th resistance, including the 17th end and the 18th end, the 17th end are connected with the 3rd interface, and described 18 ends are connected with the output circuit of the power conversion device;
Second switch, it is connected with the 14th end, the second switch includes the 19th end and the 20th end, and described 19 ends are connected with the 15th end, and 20 end is connected with the 3rd interface.
The one or more technical schemes provided in the embodiment of the present application, have at least the following technical effects or advantages:
As a result of first, the input voltage of changing that detection is input to the power conversion device inputs electricity into first Pressure;Then, based on the corresponding relation between input voltage and power output, the conversion power output of the power conversion device is determined For the first power output corresponding with first input voltage;Finally, based on first input voltage, output described first The technological means of power output, i.e. the size of input voltage is detected first, then according to corresponding to determining the size of input voltage Power output size, finally the size of output current is controlled to realize corresponding power output, power supply adaptor can be according to difference Power supply carry out power conversion and charged, so, to efficiently solve power supply adaptor presence in the prior art can only support A kind of technical problem for being charged of power supply for exporting certain power, and then realize power supply adaptor and can support a variety of differences The technique effect that the power supply of power output is charged.
Further, as a result of first, what detection was input to the power conversion device changes input voltage as the One input voltage;Then, based on the corresponding relation between input voltage and power output, the conversion of the power conversion device is determined Power output is the first power output corresponding with first input voltage;Finally, based on first input voltage, output The technological means of first power output, i.e. the size of input voltage is detected first, it is then true according to the size of input voltage Power output size corresponding to fixed, finally controls the size of output current to realize corresponding power output, therefore, utilizes the application The technical scheme of offer can provide different power outputs, so, efficiently solve power supply adaptor presence in the prior art Power output is single, the relatively low technical problem of versatility, and then realizes power supply adaptor and can export a variety of power outputs, leads to With the higher technique effect of property.
Brief description of the drawings
Fig. 1 is the flow chart of method for power conversion in the embodiment of the present application one;
Fig. 2 is the structure chart of power conversion device in the embodiment of the present application one;
Fig. 3 is the structure chart of voltage detecting circuit in the embodiment of the present application one;
Fig. 4 is the structure chart of output current control circuit in the embodiment of the present application one;
Fig. 5 is the structure chart of power output circuit in the embodiment of the present application one.
Embodiment
The embodiment of the present application solves power supply adaptor in the prior art by providing a kind of method for power conversion and device In the presence of the technical problem that can only support that a kind of power supply for exporting certain power is charged, realizing power supply adaptor can support The technique effect that the power supply of a variety of different output powers is charged.
Technical scheme during the application is implemented is solution above-mentioned technical problem.General thought is as follows:
First, what detection was input to the power conversion device changes input voltage as the first input voltage;Then, it is based on Corresponding relation between input voltage and power output, the conversion power output for determining the power conversion device are and described first First power output corresponding to input voltage;Finally, based on first input voltage, first power output is exported, i.e. The size of input voltage is detected first, and then the power output size according to corresponding to determining the size of input voltage, is finally controlled The size of output current realizes corresponding power output, so, efficiently solve in the prior art power supply adaptor exist can only The technical problem for supporting a kind of power supply for exporting certain power to be charged, a variety of differences can be supported by realizing power supply adaptor The technique effect that the power supply of power output is charged.
In order to be better understood from above-mentioned technical proposal, below in conjunction with Figure of description and specific embodiment to upper Technical scheme is stated to be described in detail.
Embodiment one
Fig. 1-5 are refer to, in embodiment one, there is provided a kind of method for power conversion, applied to a power conversion device In, the power conversion device can be that electronic equipment carries out power conversion, and in actual applications, the electronic equipment can be Tablet personal computer, can be mobile phone or game machine, and the application is not particularly limited.Power in the embodiment of the present application turns The method of changing specifically includes:
S10, what detection was input to the power conversion device changes input voltage as the first input voltage.
Wherein, in the embodiment of the present application, described detect is input to the conversion input voltage of the power conversion device and is First input voltage, it is specially:
The conversion of the power conversion device is input to by the voltage detecting circuit detection in the power conversion device Input voltage is the first input voltage.
Fig. 3 is refer to, in the embodiment of the present application, the voltage detecting circuit 101 specifically includes:
First resistor 1011, including first end and the second end, wherein, the first end is defeated with the power conversion device Enter circuit connection, second end is connected with the first interface of the power conversion device;
Second resistance 1012, including the 3rd end and the 4th end, wherein, the 3rd end ground connection, the 4th end with it is described First interface connects;
Voltage comparator 1013, including the first positive pole and the first negative pole, first positive pole are connected with the first interface, First negative pole is connected with the first reference power supply.
Wherein, in the embodiment of the present application, the voltage detecting circuit 101 by the power conversion device detects Be input to the power conversion device changes input voltage as the first input voltage, specifically includes:
First positive pole obtains the first voltage to be compared from the first power power supply to be converted, and first negative pole is from described First reference power supply obtains the first normal voltage;
By the described first voltage to be compared compared with first normal voltage, the first comparative result is obtained;
When first comparative result shows that the first normal voltage described in the described first voltage ratio to be compared is big, the electricity The first default high level of comparator output is pressed, now, the described first default high level is first input voltage;
Show the first normal voltage hour, the electricity described in the described first voltage ratio to be compared in first comparative result The first default low level of comparator output is pressed, now, the described first default low level is first input voltage.
Below by the operation principle for introducing voltage detecting circuit of illustrating.
Assuming that electronic equipment is a notebook computer, and user thinks to charge to notebook computer aboard, existing In technology, because the direct current jack fan-out capability on aircraft only has 75W, if it exceeds 75W will trigger fuse action, and use The power supply adaptor power output of family notebook is that 90W will be unable to use, and uses the method for power conversion can of this programme Realize that user charges to notebook computer aboard, specifically, implementation process is as follows:
User inserts the power supply adaptor of notebook computer in socket aboard, it is assumed that the direct current output electricity on aircraft Pressure is 16V, and at this moment the output voltage for the power supply that voltage detecting circuit detects is 16V, is shown with reference to the voltage detecting circuit in figure 2 It is intended to, at this moment the input voltage of input voltage detection circuit is just 16V, and then the voltage to be compared of input voltage comparator is just 16V;The operation principle of voltage comparator is by input voltage compared with a reference power supply, if input voltage compares standard electric Pressure is high, just exports a default high level, it is assumed that high level 5V;If input voltage forces down than standard electric, just output one is pre- If low level, it is assumed that low level 2V;If the voltage of the first reference power supply now is 14V, at this moment input voltage 16V just compares Normal voltage is high, so now voltage comparator output high level 5V, at this moment the first input voltage is just 5V, and then power is changed Device controls corresponding output current according to 5V input voltage so that the power output of the voltage adapter of notebook is reduced to 70W, meet the requirement on aircraft.
In actual applications, 5V and 2V in two kinds of level caused by voltage comparator, such as above-mentioned example, wherein, 5V's High level can produce driving and carry out connecting or disconnecting for controlling switch, and caused 2V low levels cannot produce driving to control System switch, so can be achieved with realizing the control of circuit by judging the size of input voltage.
After step slo, the method for the embodiment of the present application just enters step S20, i.e.,:Based on input voltage and output work Corresponding relation between rate, determine the conversion power output of the power conversion device for corresponding with first input voltage the One power output.
Wherein, in the embodiment of the present application, the corresponding relation based between input voltage and power output, it is determined that described The conversion power output of power conversion device is the first power output corresponding with first input voltage, is specially:
Based on the corresponding relation between input voltage and power output, by the power conversion device with the voltage Detection circuit connection output current control circuit determine the conversion power output of the power conversion device be with it is described first defeated Enter the first power output corresponding to voltage.
Wherein, Fig. 4 is refer to, in the embodiment of the present application, the output current control circuit 102 specifically includes:
3rd resistor 1021, including the 5th end and the 6th end, the 5th end and the power conversion device with it is described The different second interface connection of first interface;
4th resistance 1022, including the 7th end and the 8th end, the 7th end are connected with the second interface, and the described 8th End ground connection;
5th resistance 1023, including the 9th end and the tenth end, the 9th end are connected with the second reference power supply, and the described tenth End is connected with the second interface;
First switch 1024, including the tenth one end and the 12nd end, described tenth one end and the six end connecting, it is described 12nd end is grounded;
First current comparator 1025, including the second positive pole and the second negative pole, second positive pole are changed with the power The first current arrester connection of device, second negative pole are connected with the second interface;
First control module 1026, including the 13rd end and the 14th end, the 13rd end and the first electric current ratio Connected compared with device, the 14th end is connected with the power output circuit in the power conversion device.
Wherein, in the embodiment of the present application, the corresponding relation based between input voltage and power output, by described Being connected output current control circuit with the voltage detecting circuit and determine the power conversion device in power conversion device Conversion power output is the first power output corresponding with first input voltage, is specifically included:
Second negative pole obtains the first normalized current from first reference power supply, and second positive pole is from described first Current amplifier obtains the first electric current to be compared;
Compare first normalized current and first electric current to be compared, obtain the second comparative result;
Based on second comparative result, first current comparator exports the first electric current to the described first control mould Block;
Based on first electric current, first control module produces the first control instruction;
First control instruction is performed, to determine the conversion power output of the power conversion device as with described first First power output corresponding to input voltage.
Wherein, in the embodiment of the present application, it is described to be based on second comparative result, the first current comparator output First electric current specifically includes to first control module:
When second comparative result shows that the described first electric current to be compared is bigger than first normalized current, described One current comparator exports the first predetermined current, and now, first predetermined current is first electric current;
Show the described first electric current to be compared than the first normalized current hour in second comparative result, described One current comparator exports the second predetermined current, and now, second predetermined current is first electric current.
Fig. 4 is refer to, below by the operation principle for introducing output current control circuit 102 of illustrating.
In actual applications, current comparator has both positive and negative polarity, such as the first current comparator 1025 have the second positive pole and Second negative pole, there are a current amplifier and the second positive pole of the first current comparator 1025 to be connected, for inputting an electricity to be compared Flow to the first current comparator 1025, the second negative pole and second in output current control circuit of the first current comparator 1025 Reference power supply is connected, and the first current comparator 1025 is given for inputting a normalized current;Wherein, the operation principle of current comparator Similar with the operation principle of voltage comparator, if the electric current of input is bigger than normalized current, now current comparator output one is default The larger electric current of current value;If the electric current of input is smaller than normalized current, now it is smaller to export a pre-set current value for current comparator Electric current, it is assumed that now the input current of first the second positive pole of current comparator is 5A, and the normalized current of the second negative pole input is 4A, the electric current of now the second positive pole input is bigger than the electric current that the second negative pole inputs, the default electricity of now the first current comparator output The larger electric current of flow valuve, such as 3A;If the electric current of the second positive pole input is smaller than the electric current that the second negative pole inputs, now the first electric current ratio The less electric current of pre-set current value, such as 1A are exported compared with device, and the first current comparator 1025 exports the electric current that obtains more afterwards to the One control module 1026, the first control module 1026 can produce different instructions according to different electric currents.
Wherein, in actual applications, the first control module is specifically as follows an intelligent IC, and intelligent IC can be according to different When the electric current being input to when the first current comparator in intelligent IC in the different instruction of electric current generation, such as above-mentioned example is 3A, At this moment instruction caused by intelligent IC is the first instruction;When the electric current that the first current comparator is input to intelligent IC is 1A, at this moment Instruct caused by intelligent IC and instructed for second, and then different instructions can have different effects, such as the first instruction is to open Close and close, the second instruction is will switch off etc., and the application is not particularly limited, because intelligent IC can be according to different electricity The raw different control of miscarriage, so as to realize that control power output circuit exports different power.
After step S20, the method for the embodiment of the present application just enters step S30, i.e.,:Based on the described first input electricity Pressure, export first power output.
Wherein, in the embodiment of the present application, it is described to be based on first input voltage, first power output is exported, Specially:
Based on first input voltage, by connecting in the power conversion device with the output current control circuit The power output circuit connect exports first power output.
Wherein, Fig. 5 is refer to, the power output circuit 103 specifically includes:
6th resistance 1031, including the 15th end and the 16th end, the 15th end and the power conversion device Input circuit connects, and the 16th end connects from three different with first and second described interface of the power conversion device Mouth connection;
7th resistance 1032, including the 17th end and the 18th end, the 17th end are connected with the 3rd interface, institute The 18th end is stated to be connected with the output circuit of the power conversion device;
Second switch 1033, it is connected with the 14th end, the second switch includes the 19th end and the 20th end, institute State the 19th end to be connected with the 15th end, 20 end is connected with the 3rd interface.
Wherein, in the embodiment of the present application, it is described to be based on first input voltage, by the power conversion device The power output circuit that is connected with the output current control circuit export first power output, specifically include:
Based on first input voltage, first control module produces the first control instruction;
By performing first control instruction, control the second switch in an ON state or off-state;
When the second switch is in the on-state constantly, the 7th resistance produces the second electric current;
Based on second electric current, the power output circuit exports first power output;
When the second switch is in the off-state, the 7th resistance produces the 3rd electric current;
Based on the 3rd electric current, the power output circuit exports first power output.
Fig. 5 is refer to, below by the operation principle for introducing power output circuit 103 of illustrating.
In actual applications, it is assumed that the output voltage of power output circuit is 20V, and the 6th resistance 1031 is 4 Europe, and the 7th is electric Resistance 1032 is 6 Europe, and second switch 1033 is connected with the first control module 1026, it is assumed that the first control module 1026 is an intelligence IC, intelligent IC can produce different instructions according to different electric current, such as control the connecting and disconnecting of second switch 1033, when the When two switches 1033 are connected, the 6th resistance 1031 is short-circuited, and at this moment the resistance in power output circuit is 6 Europe, and now power is defeated The output current for going out circuit is 3.33A, power output 66W;When second switch 1033 disconnects, the 6th resistance 1031 and the 7th The access power output circuit of resistance 1032, now the resistance in power output circuit is 10 Europe, and now power output circuit is defeated It is 2A, power output 40W to go out electric current.So it is achieved that and exports different power outputs, it is possible to using in this programme The power output of power supply adaptor is converted into 40W when method charges aboard, meets requirement aboard, in vapour The power output of power supply adaptor is converted into 66W when being charged on car, meets the requirement on automobile.Wherein, in reality In, the implementation of power output circuit have it is a variety of, change the way of output of power can also have it is a variety of, as long as can realize Change output current and realize control power output can, the application is not particularly limited.
Technical scheme in above-mentioned the embodiment of the present application, at least has the following technical effect that or advantage:
As a result of first, the input voltage of changing that detection is input to the power conversion device inputs electricity into first Pressure;Then, based on the corresponding relation between input voltage and power output, the conversion power output of the power conversion device is determined For the first power output corresponding with first input voltage;Finally, based on first input voltage, output described first The technological means of power output, i.e. the size of input voltage is detected first, then according to corresponding to determining the size of input voltage Power output size, finally the size of output current is controlled to realize corresponding power output, power supply adaptor can be according to difference Power supply carry out power conversion and charged, so, to efficiently solve power supply adaptor presence in the prior art can only support A kind of technical problem for being charged of power supply for exporting certain power, and then realize power supply adaptor and can support a variety of differences The technique effect that the power supply of power output is charged.
Further, as a result of first, what detection was input to the power conversion device changes input voltage as the One input voltage;Then, based on the corresponding relation between input voltage and power output, the conversion of the power conversion device is determined Power output is the first power output corresponding with first input voltage;Finally, based on first input voltage, output The technological means of first power output, i.e. the size of input voltage is detected first, it is then true according to the size of input voltage Power output size corresponding to fixed, finally controls the size of output current to realize corresponding power output, therefore, utilizes the application The technical scheme of offer can provide different power outputs, so, efficiently solve power supply adaptor presence in the prior art Power output is single, the relatively low technical problem of versatility, and then realizes power supply adaptor and can export a variety of power outputs, leads to With the higher technique effect of property.
A kind of method for power conversion in corresponding embodiment one, embodiment one also provide a kind of power conversion device, please joined Examine Fig. 2-5, the device 10 in the embodiment of the present application includes:
Voltage detecting circuit 101, for detect be input to the power conversion device to change input voltage defeated into first Enter voltage;
Output current control circuit 102, it is connected with the voltage detecting circuit 101, for based on input voltage and output Corresponding relation between power, the conversion power output for determining the power conversion device are corresponding with first input voltage First power output;
Power output circuit 103, it is connected with the output current control circuit 102, for based on the described first input electricity Pressure, export first power output.
Wherein, in the embodiment of the present application, the voltage detecting circuit 101 specifically includes:
First resistor 1011, including first end and the second end, wherein, the first end is defeated with the power conversion device Enter circuit connection, second end is connected with the first interface of the power conversion device;
Second resistance 1012, including the 3rd end and the 4th end, wherein, the 3rd end ground connection, the 4th end with it is described First interface connects;
Voltage comparator 1013, including the first positive pole and the first negative pole, first positive pole are connected with the first interface, First negative pole is connected with the first reference power supply.
Wherein, in the embodiment of the present application, the output current control circuit 102 specifically includes:
3rd resistor 1021, including the 5th end and the 6th end, the 5th end and the power conversion device with it is described The different second interface connection of first interface;
4th resistance 1022, including the 7th end and the 8th end, the 7th end are connected with the second interface, and the described 8th End ground connection;
5th resistance 1023, including the 9th end and the tenth end, the 9th end are connected with the second reference power supply, and the described tenth End is connected with the second interface;
First switch 1024, including the tenth one end and the 12nd end, described tenth one end and the six end connecting, it is described 12nd end is grounded;
First current comparator 1025, including the second positive pole and the second negative pole, second positive pole are changed with the power The first current arrester connection of device, second negative pole are connected with the second interface;
First control module 1026, including the 13rd end and the 14th end, the 13rd end and the first electric current ratio Connected compared with device, the 14th end is connected with the power output circuit 103 in the power conversion device.
Wherein, in the embodiment of the present application, the power output circuit 103 specifically includes:
6th resistance 1031, including the 15th end and the 16th end, the 15th end and the power conversion device Input circuit connects, and the 16th end connects from three different with first and second described interface of the power conversion device Mouth connection;
7th resistance 1032, including the 17th end and the 18th end, the 17th end are connected with the 3rd interface, institute The 18th end is stated to be connected with the output circuit of the power conversion device;
Second switch 1033, it is connected with the 14th end, the second switch includes the 19th end and the 20th end, institute State the 19th end to be connected with the 15th end, 20 end is connected with the 3rd interface.
Technical scheme in above-mentioned the embodiment of the present application, at least has the following technical effect that or advantage:
As a result of first, the input voltage of changing that detection is input to the power conversion device inputs electricity into first Pressure;Then, based on the corresponding relation between input voltage and power output, the conversion power output of the power conversion device is determined For the first power output corresponding with first input voltage;Finally, based on first input voltage, output described first The technological means of power output, i.e. the size of input voltage is detected first, then according to corresponding to determining the size of input voltage Power output size, finally the size of output current is controlled to realize corresponding power output, power supply adaptor can be according to difference Power supply carry out power conversion and charged, so, to efficiently solve power supply adaptor presence in the prior art can only support A kind of technical problem for being charged of power supply for exporting certain power, and then realize power supply adaptor and can support a variety of differences The technique effect that the power supply of power output is charged.
Further, as a result of first, what detection was input to the power conversion device changes input voltage as the One input voltage;Then, based on the corresponding relation between input voltage and power output, the conversion of the power conversion device is determined Power output is the first power output corresponding with first input voltage;Finally, based on first input voltage, output The technological means of first power output, i.e. the size of input voltage is detected first, it is then true according to the size of input voltage Power output size corresponding to fixed, finally controls the size of output current to realize corresponding power output, therefore, utilizes the application The technical scheme of offer can provide different power outputs, so, efficiently solve power supply adaptor presence in the prior art Power output is single, the relatively low technical problem of versatility, and then realizes power supply adaptor and can export a variety of power outputs, leads to With the higher technique effect of property.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know basic creation Property concept, then can make other change and modification to these embodiments.So appended claims be intended to be construed to include it is excellent Select embodiment and fall into having altered and changing for the scope of the invention.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention God and scope.So, if these modifications and variations of the present invention belong to the scope of the claims in the present invention and its equivalent technologies Within, then the present invention is also intended to comprising including these changes and modification.

Claims (15)

  1. A kind of 1. method for power conversion, applied in a power conversion device, it is characterised in that methods described includes:
    What detection was input to the power conversion device changes input voltage as the first input voltage;
    Based on the corresponding relation between input voltage and power output, the conversion power output that determines the power conversion device be with First power output corresponding to first input voltage;
    Based on first input voltage, first power output is exported;
    It is described to be based on first input voltage, first power output is exported, including:
    Corresponding output current is controlled according to first input voltage so that the power conversion device output described first is defeated Go out power.
  2. 2. the method as described in claim 1, it is characterised in that the conversion that the detection is input to the power conversion device is defeated It is the first input voltage to enter voltage, is specially:
    The conversion that the power conversion device is input to by the voltage detecting circuit detection in the power conversion device inputs Voltage is the first input voltage.
  3. 3. method as claimed in claim 2, it is characterised in that the voltage detecting circuit specifically includes:
    First resistor, including first end and the second end, wherein, the first end and the input circuit of the power conversion device connect Connect, second end is connected with the first interface of the power conversion device;
    Second resistance, including the 3rd end and the 4th end, wherein, the 3rd end is grounded, the 4th end and the first interface Connection;
    Voltage comparator, including the first positive pole and the first negative pole, first positive pole are connected with the first interface, and described first Negative pole is connected with the first reference power supply.
  4. 4. method as claimed in claim 3, it is characterised in that the voltage detecting electricity by the power conversion device What road detection was input to the power conversion device changes input voltage as the first input voltage, specifically includes:
    First positive pole obtains the first voltage to be compared from the first power power supply to be converted, and first negative pole is from described first Reference power supply obtains the first normal voltage;
    By the described first voltage to be compared compared with first normal voltage, the first comparative result is obtained;
    When first comparative result shows that the first normal voltage described in the described first voltage ratio to be compared is big, the voltage ratio Compared with the first default high level of device output, now, the described first default high level is first input voltage;
    Show the first normal voltage hour, the voltage ratio described in the described first voltage ratio to be compared in first comparative result Compared with the first default low level of device output, now, the described first default low level is first input voltage.
  5. 5. the method as described in any claim in claim 1-4, it is characterised in that described to be based on input voltage and power output Between corresponding relation, determine the power conversion device conversion power output be and first input voltage corresponding first Power output, it is specially:
    Based on the corresponding relation between input voltage and power output, by the power conversion device with the voltage detecting Circuit connection output current control circuit determines that the conversion power output of the power conversion device is and the described first input electricity First power output corresponding to pressure.
  6. 6. method as claimed in claim 5, it is characterised in that the output current control circuit specifically includes:
    3rd resistor, including the 5th end and the 6th end, the 5th end and the power conversion device and the first interface Different second interface connections;
    4th resistance, including the 7th end and the 8th end, the 7th end are connected with the second interface, the 8th end ground connection;
    5th resistance, including the 9th end and the tenth end, the 9th end are connected with the second reference power supply, the tenth end with it is described Second interface connects;
    First switch, including the tenth one end and the 12nd end, described tenth one end and the six end connecting, the 12nd end Ground connection;
    First current comparator, including the second positive pole and the second negative pole, the of second positive pole and the power conversion device One current arrester is connected, and second negative pole is connected with the second interface;
    First control module, including the 13rd end and the 14th end, the 13rd end are connected with first current comparator, 14th end is connected with the power output circuit in the power conversion device.
  7. 7. method as claimed in claim 6, it is characterised in that the corresponding pass based between input voltage and power output System, the power is determined by being connected output current control circuit with the voltage detecting circuit in the power conversion device The conversion power output of conversion equipment is the first power output corresponding with first input voltage, is specifically included:
    Second negative pole obtains the first normalized current from first reference power supply, and second positive pole is from first electric current Amplifier obtains the first electric current to be compared;
    Compare first normalized current and first electric current to be compared, obtain the second comparative result;
    Based on second comparative result, first current comparator exports the first electric current to first control module;
    Based on first electric current, first control module produces the first control instruction;
    First control instruction is performed, is inputted using the conversion power output for determining the power conversion device as with described first First power output corresponding to voltage.
  8. 8. method as claimed in claim 7, it is characterised in that described to be based on second comparative result, first electric current Comparator exports the first electric current to first control module, specifically includes:
    When second comparative result shows that the described first electric current to be compared is bigger than first normalized current, first electricity Flow comparator and export the first predetermined current, now, first predetermined current is first electric current;
    Show the described first electric current to be compared than the first normalized current hour, first electricity in second comparative result Flow comparator and export the second predetermined current, now, second predetermined current is first electric current.
  9. 9. method as claimed in claim 8, it is characterised in that described to be based on first input voltage, output described first Power output, it is specially:
    Based on first input voltage, pass through being connected with the output current control circuit in the power conversion device The power output circuit exports first power output.
  10. 10. method as claimed in claim 9, it is characterised in that the power output circuit specifically includes:
    6th resistance, including the 15th end and the 16th end, the 15th end and the input circuit of the power conversion device Connection, the 16th end is connected from the 3rd interfaces different with first and second described interface of the power conversion device;
    7th resistance, including the 17th end and the 18th end, the 17th end are connected with the 3rd interface, and the described 18th End is connected with the output circuit of the power conversion device;
    Second switch, it is connected with the 14th end, the second switch includes the 19th end and the 20th end, and the described 19th End is connected with the 15th end, and 20 end is connected with the 3rd interface.
  11. 11. method as claimed in claim 10, it is characterised in that it is described to be based on first input voltage, pass through the work( The power output circuit being connected with the output current control circuit in rate conversion equipment exports first power output, tool Body includes:
    Based on first input voltage, first control module produces the first control instruction;
    By performing first control instruction, control the second switch in an ON state or off-state;
    When the second switch is in the on-state constantly, the 7th resistance produces the second electric current;
    Based on second electric current, the power output circuit exports first power output;
    When the second switch is in the off-state, the 7th resistance produces the 3rd electric current;
    Based on the 3rd electric current, the power output circuit exports first power output.
  12. A kind of 12. power conversion device, it is characterised in that including:
    Voltage detecting circuit, for detect be input to the power conversion device change input voltage as the first input voltage;
    Output current control circuit, it is connected with the voltage detecting circuit, for based on pair between input voltage and power output It should be related to, the conversion power output for determining the power conversion device is the first output work corresponding with first input voltage Rate;
    Power output circuit, it is connected with the output current control circuit, for based on first input voltage, described in output First power output;
    The power output circuit is specifically used for:Corresponding output current is controlled according to first input voltage so that described Power conversion device exports first power output.
  13. 13. device as claimed in claim 12, it is characterised in that the voltage detecting circuit specifically includes:
    First resistor, including first end and the second end, wherein, the first end and the input circuit of the power conversion device connect Connect, second end is connected with the first interface of the power conversion device;
    Second resistance, including the 3rd end and the 4th end, wherein, the 3rd end is grounded, the 4th end and the first interface Connection;
    Voltage comparator, including the first positive pole and the first negative pole, first positive pole are connected with the first interface, and described first Negative pole is connected with the first reference power supply.
  14. 14. device as claimed in claim 13, it is characterised in that the output current control circuit specifically includes:
    3rd resistor, including the 5th end and the 6th end, the 5th end and the power conversion device and the first interface Different second interface connections;
    4th resistance, including the 7th end and the 8th end, the 7th end are connected with the second interface, the 8th end ground connection;
    5th resistance, including the 9th end and the tenth end, the 9th end are connected with the second reference power supply, the tenth end with it is described Second interface connects;
    First switch, including the tenth one end and the 12nd end, described tenth one end and the six end connecting, the 12nd end Ground connection;
    First current comparator, including the second positive pole and the second negative pole, the of second positive pole and the power conversion device One current arrester is connected, and second negative pole is connected with the second interface;
    First control module, including the 13rd end and the 14th end, the 13rd end are connected with first current comparator, 14th end is connected with the power output circuit in the power conversion device.
  15. 15. device as claimed in claim 14, it is characterised in that the power output circuit specifically includes:
    6th resistance, including the 15th end and the 16th end, the 15th end and the input circuit of the power conversion device Connection, the 16th end is connected from the 3rd interfaces different with first and second described interface of the power conversion device;
    7th resistance, including the 17th end and the 18th end, the 17th end are connected with the 3rd interface, and the described 18th End is connected with the output circuit of the power conversion device;
    Second switch, it is connected with the 14th end, the second switch includes the 19th end and the 20th end, and the described 19th End is connected with the 15th end, and 20 end is connected with the 3rd interface.
CN201310198395.6A 2013-05-24 2013-05-24 A kind of method for power conversion and device Active CN104184304B (en)

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CN108631586B (en) * 2018-05-29 2019-09-13 合肥为民电源有限公司 A kind of control method and device of generated output power

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