CN105259965A - Power supply adapter and power supply adapting method - Google Patents
Power supply adapter and power supply adapting method Download PDFInfo
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- CN105259965A CN105259965A CN201510564214.6A CN201510564214A CN105259965A CN 105259965 A CN105259965 A CN 105259965A CN 201510564214 A CN201510564214 A CN 201510564214A CN 105259965 A CN105259965 A CN 105259965A
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
- G05F1/561—Voltage to current converters
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Abstract
The invention provides a power supply adapter and a power supply adapting method; the power supply adapter comprises a microcontrol unit MCU module, a digit adjustable resistor, a DC-DC module, a voltage sampling circuit and a current sampling circuit; an ADC pin of the MCU module is connected with the voltage sampling circuit and the current sampling circuit; the MCU module is connected with the digit adjustable resistor through a serial interface; the voltage sampling circuit and the current sampling circuit are respectively connected with a voltage output end of the DC-DC module; the digit adjustable resistor is a divider resistor of negative feedback voltage of the DC-DC module, and arranged in the DC-DC module. The power supply adapter can output different power supply voltages, thus powering up different electronic equipment needing different power supply voltages.
Description
Technical field
The present invention relates to power adaptation technical field, particularly relate to a kind of method of power supply adaptor and power adapter.
Background technology
POE (PowerOverEthernet, be called for short POE) refer to when existing Ethernet wiring architecture is not changed, while some terminals based on Ethernet (as IP telephone machine, wireless local network connecting point, web camera, notebook computer etc.) transmission of data signals, the technology of direct current supply can also be provided by Terminal Type for this reason.
The current electric power system based on Ethernet comprises POE switch and is connected through netting twine 1 with POE power supply adaptor, POE power supply adaptor is connected with terminal through netting twine 2, when POE power supply adaptor receives the power supply signal of POE switch, utilize the DC-DC module in POE power supply adaptor, the DC voltage V1 (V1=48V) provided by POE switch converts the voltage V2 meeting terminal voltage demand to, and (V2 is less than V1, be generally 16V-24V), thus power for terminal.
DC-DC module in existing power supply adaptor has a lot, such as, model be the electrical block diagram of the DC-DC module of LM2576 as shown in Figure 1, wherein resistance R1 and resistance R2 is respectively the divider resistance of the negative feedback voltage of DC-DC module, the change in resistance of resistance R1 and resistance R2 needs artificial adjustment, can not adjust according to electronic equipment required voltage automatically.
But, the general required voltage of different terminals is different, DC-DC module in existing this POE power supply adaptor needs the output voltage being adjusted DC-DC module by manual change's resistance, adaptively cannot should be the voltage that different terminals provides different, cause the problem that existing POE power supply adaptor practicality is not high.
Summary of the invention
The invention provides a kind of method of power supply adaptor and power adapter, adaptively cannot should be in order to solve power supply adaptor of the prior art the voltage that different terminals provides different, cause the problem that existing POE power supply adaptor practicality is not high.
A kind of power supply adaptor, comprising:
Micro-control unit MCU module, solid relay, DC-DC module and voltage sampling circuit and current sampling circuit, the ADC pin of MCU module is connected with described voltage sampling circuit and described current sampling circuit, described MCU module is connected by serial line interface with described solid relay, described voltage sampling circuit and current sampling circuit are connected with the voltage output end of described DC-DC module respectively, described solid relay is the divider resistance of the negative feedback voltage of described DC-DC module and is positioned at described DC-DC module inside, wherein
Voltage sampling circuit, for output voltage Real-time Feedback after the current output voltage of Real-time Collection DC-DC module and adjustment to MCU module;
Current sampling circuit, for current output current and the rear output current of adjustment of Real-time Collection DC-DC module, and Real-time Feedback is to MCU module;
MCU module, for obtaining the current output voltage of described DC-DC module and current output current; Resistance adjustment signal is sent to described solid relay; To obtain after the adjustment of described DC-DC module output current after output voltage and adjustment; According to output current after output voltage, current output current and adjustment after described current output voltage, adjustment, determine the actual supply voltage for described power electronic equipment of described DC-DC module;
Solid relay, carries out resistance adjustment for the resistance adjustment signal sent according to described MCU module;
DC-DC module, for exporting current output voltage and current output current; According to the described adjustment according to described solid relay resistance, export the rear output voltage of adjustment and output current after adjusting.
In described adapter, described current sampling circuit, specifically comprises:
First resistance and the first amplifier, wherein, the first end of described first resistance is connected with the negative input end of described first amplifier, and, the voltage output end of the external described DC-DC module of first end of described first resistance, second end of described first resistance is connected with the positive input terminal of described first amplifier, the ADC pin of the external described MCU module of output terminal of described first amplifier.
The embodiment of the present invention gathers current output current and the rear output current of adjustment of DC-DC module by current sampling circuit, and sends to MCU module, carries out subsequent treatment to make MCU module according to output current after current output current and adjustment.
In described adapter, described voltage sampling circuit, specifically comprise: the second resistance, the 3rd resistance and the second amplifier, wherein, the voltage output end of the external described DC-DC module of first end of described second resistance, second end of described second resistance is connected with the first end of described 3rd resistance, and, the first end of described 3rd resistance is connected with the positive input terminal of described second amplifier, second end of described 3rd resistance is connected with the negative input end of described second amplifier, the ADC pin of the external described MCU module of output terminal of described second amplifier.
The embodiment of the present invention gathers current output voltage and the rear output voltage of adjustment of DC-DC module by voltage sampling circuit, and sends to MCU module, carries out subsequent treatment to make MCU module according to output voltage after current output voltage and adjustment.
In described adapter, described MCU module specifically for:
Send the signal reducing resistance to described solid relay, the signal of described reduction resistance is used to indicate the resistance reduction default value of described solid relay;
Then described solid relay specifically for: the signal according to described reduction resistance carries out resistance adjustment, and wherein, when the resistance of described solid relay reduces, the output voltage of described DC-DC module increases.
In described adapter, described MCU module when obtaining the current output voltage of described DC-DC module and current output current, specifically for:
The current output voltage of described DC-DC module and current output current is repeatedly obtained in preset duration;
Described MCU module is output voltage and the rear output current of adjustment after the adjustment obtaining described DC-DC module, specifically for:
Output current after output voltage and adjustment is repeatedly obtained after the adjustment of described DC-DC module in described preset duration.
In described adapter, described MCU module specifically for:
Current power is calculated according to described current output voltage and described current output current;
The rear power of adjustment is calculated according to output current after output voltage after described adjustment and adjustment;
When the absolute value of the difference of power is less than or equal to predetermined power threshold value after determining described current power and described adjustment, determine that described current output voltage is the actual supply voltage for described power electronic equipment of described DC-DC module;
When the absolute value of the difference of power is greater than predetermined power threshold value after determining described current power and described adjustment, output voltage after described adjustment is also performed the operation of the current output voltage gathering DC-DC module as current output voltage.
Utilize the embodiment of the present invention, the actual supply voltage for power electronic equipment of DC-DC module can be determined, thus ensure as electronic equipment normal power supply.
The present invention also provides a kind of method of power adapter, comprising:
Micro-control unit MCU module obtains the current output voltage of the DC-DC module that voltage sampling circuit gathers, and obtains the current output current of the DC-DC module that current sampling circuit gathers, and described DC-DC module is with solid relay;
Send resistance adjustment signal to described solid relay, described solid relay is the divider resistance of the negative feedback voltage of described DC-DC module and is positioned at described DC-DC module inside;
Output voltage after the adjustment of the DC-DC module that acquisition voltage sampling circuit gathers, and output current after obtaining the adjustment of the DC-DC module that current sampling circuit gathers;
According to output current after output voltage after described current output voltage, current output current, adjustment and adjustment, determine the actual supply voltage for power electronic equipment of described DC-DC module.
In described method, send resistance adjustment signal to described solid relay, specifically comprise:
The signal reducing resistance is sent to described solid relay, the signal of described reduction resistance is used to indicate the resistance reduction default value of described solid relay, output current after being adjusted rear output voltage and adjustment to make described DC-DC module also exports, wherein, when the resistance of described solid relay reduces, the output voltage of described DC-DC module increases.
In described method, obtain the current output voltage of the DC-DC module that voltage sampling circuit gathers, and obtain the current output current of the DC-DC module that current sampling circuit gathers, specifically comprise:
In preset duration, repeatedly obtain the current output voltage of the DC-DC module that voltage sampling circuit gathers, and in described preset duration, repeatedly obtain the current output current of the DC-DC module that current sampling circuit gathers;
Output voltage after the adjustment of the DC-DC module that acquisition voltage sampling circuit gathers, and output current after obtaining the adjustment of the DC-DC module that current sampling circuit gathers, specifically comprise:
Repeatedly obtain in described preset duration voltage sampling circuit gather DC-DC module adjustment after output voltage, and repeatedly obtain in described preset duration current sampling circuit gather DC-DC module adjustment after output current.
In described method, according to output current after output voltage after described current output voltage, current output current, adjustment and adjustment, determine the actual supply voltage for power electronic equipment of described DC-DC module, specifically comprise:
Calculate current power according to described current output voltage and described current output current, and calculate the rear power of adjustment according to output current after output voltage after described adjustment and adjustment;
When the absolute value of the difference of power is less than or equal to predetermined power threshold value after determining described current power and described adjustment, determine that described current output voltage is the actual supply voltage for described power electronic equipment of described DC-DC module;
When the absolute value of the difference of power is greater than predetermined power threshold value after determining described current power and described adjustment, output voltage after described adjustment is also performed the operation of the current output voltage obtaining DC-DC module as current output voltage.
Utilize the method that the invention provides power supply adaptor and power adapter, there is following beneficial effect: by adding solid relay in the DC-DC module of existing power supply adapter, and the resistance of the solid relay in DC-DC module is adjusted by MCU module, realize the controlling and adjustment to the output voltage of DC-DC module, thus realize the different voltage of output that a power supply adaptor can be real-time, do not need artificial participation, and then the power supply adaptor making the embodiment of the present invention provide can be the different power electronic equipment of supply voltage, and can the output voltage of adaptive adjustment DC-DC module, thus be different power electronic equipment.
Accompanying drawing explanation
Fig. 1 is the DC-DC module structural representation in the power supply adaptor of prior art;
The structural representation of the power supply adaptor that Fig. 2 provides for the embodiment of the present invention;
The solid relay structural representation that Fig. 3 provides for the embodiment of the present invention;
The current sampling circuit that Fig. 4 provides for the embodiment of the present invention and voltage sampling circuit schematic diagram;
The method flow diagram of the power adapter that Fig. 5 provides for the embodiment of the present invention;
The actual supply voltage method flow diagram for power electronic equipment of determination DC-DC module that Fig. 6 provides for the embodiment of the present invention.
Embodiment
Fit device below in conjunction with drawings and Examples to the method for power adapter provided by the invention and power supply to illustrate in greater detail.
Embodiments providing a kind of power supply adaptor, for being different power electronic equipment, as shown in Figure 2, comprising:
Micro-control unit MCU module 100, DC-DC module 200, solid relay 201, and voltage sampling circuit 300 and current sampling circuit 400, the digital-to-analog conversion ADC pin of MCU module 100 is connected with described voltage sampling circuit 300 and described current sampling circuit 400, described MCU module 100 is connected by serial line interface with described solid relay 201, described voltage sampling circuit 300 and current sampling circuit 400 are connected with the voltage output end VOUT of described DC-DC module 200 respectively, described solid relay 201 is the divider resistance of the negative feedback voltage of described DC-DC module 200 and is positioned at described DC-DC module inside, wherein,
Voltage sampling circuit 300, for output voltage Real-time Feedback after the current output voltage of Real-time Collection DC-DC module 200 and adjustment to MCU module 100;
Current sampling circuit 400, for current output current and the rear output current of adjustment of Real-time Collection DC-DC module 200, and Real-time Feedback is to MCU module 100;
MCU module 100, for obtaining the current output voltage of described DC-DC module 200 and current output current; Resistance adjustment signal is sent to described solid relay 201; To obtain after the adjustment of described DC-DC module 200 output current after output voltage and adjustment; According to output current after output voltage, current output current and adjustment after described current output voltage, adjustment, determine that described DC-DC module 200 reality is the supply voltage of described power electronic equipment;
Solid relay 201, carries out resistance adjustment for the resistance adjustment signal sent according to described MCU module 100;
DC-DC module 200, for exporting current output voltage and current output current; According to the described adjustment according to described solid relay 201 resistance, export the rear output voltage of adjustment and output current after adjusting.
Concrete, DC-DC and DC-DC power supply, the output voltage of the DC-DC module 200 in power supply adaptor is power electronic equipment.Solid relay 201 in DC-DC module 200 is by MCU (MicrocontrollerUnit, micro-control unit) module 100 controls, when the resistance of MCU module 100 control figure adjustable resistance 201 reduces, the output voltage of DC-DC module 200 will increase; When the resistance of MCU module 100 control figure adjustable resistance 201 increases, the output voltage of DC-DC module 200 will reduce, and therefore, the power supply adaptor that the embodiment of the present invention provides can provide different voltage in real time, thus is different power electronic equipment.In actual applications, the model of the DC-DC module in the embodiment of the present invention can on the basis that signal is the DC-DC module of LM2576, resistance R1 in LM2576 is replaced with the solid relay 201 in the embodiment of the present invention, thus obtain the power supply adaptor of the embodiment of the present invention.
Realize in the embodiment of the present invention adaptively should be the method that distinct electronic apparatuses powers and being: voltage sampling circuit 300 and current sampling circuit 400 be the current output voltage of Real-time Collection DC-DC module 200 and current output current respectively, MCU module 100 sends resistance adjustment signal to solid relay 201, thus control the adjustment of the output voltage of DC-DC module 200, and output voltage output current rear with adjustment after the adjustment of Real-time Collection DC-DC module 200, MCU module 100 is according to the current output voltage of the DC-DC module 200 obtained, current output current, output voltage and the rear output current of adjustment after adjustment, determine that described DC-DC module 200 reality is the supply voltage of described power electronic equipment.Preferably, the initial output voltage of DC-DC module 200 is the available minimum voltage of power supply adaptor, such as this setting value equals 16V, and the voltage owing to providing can be prevented so excessive and damage electronic equipment, this initial voltage is the current output voltage of DC-DC module 200.
Wherein, solid relay 201 schematic diagram as shown in Figure 3, comprises internal control module and resistive module, the resistance adjustment of the control signal controlling resistance module resistance that internal control module sends according to outside.In the embodiment of the present invention, MCU module 100 is connected with solid relay 201 with serial line interface SDA by serial line interface SCL, be specially, the SCL pin of MCU module 100 is connected with the SCL pin of solid relay 201, the SDA pin of MCU module 100 is connected with the SDA pin of solid relay 201, the current potential of solid relay regulates pin W1 ground connection, high-order pin RH is connected with the negative feedback voltage input end of DC-DC module 200, thus plays the effect of the divider resistance of negative feedback voltage.Solid relay shown in Fig. 3 is the rough schematic of existing solid relay (digital regulation resistance), the concrete inner structure of the solid relay of different model is different, here the principle of work of this solid relay is not described in detail, the model of the solid relay of the embodiment of the present invention can be MAX5433, also can be other model, not limit here.
Because DC-DC module of the prior art needs artificial this DC-DC module of adjustment that participates in export different voltage, cannot be power electronic equipment in real time, adaptively.And the embodiment of the present invention, by adding solid relay in the DC-DC module of existing power supply adapter, and the resistance of the solid relay in DC-DC module is adjusted by MCU module, realize the controlling and adjustment to the output voltage of DC-DC module, thus realize a power supply adaptor and can export different voltage in real time, do not need artificial participation, and then the power supply adaptor making the embodiment of the present invention provide can be the different power electronic equipment of required supply voltage, and can the output voltage of adaptive adjustment DC-DC module, thus be different power electronic equipment.
Preferably, as shown in Figure 4, described current sampling circuit 400 specifically comprises: the first resistance R3 and the first amplifier, wherein, the first end of described first resistance R3 is connected with the negative input end of described first amplifier, and, the voltage output end VOUT of the external described DC-DC module 200 of first end of described first resistance R3, second end of described first resistance R3 is connected with the positive input terminal of described first amplifier, and the digital revolving die of the external described MCU module 100 of output terminal OUT1 of described first amplifier intends ADC pin.
Preferably, as shown in Figure 4, described voltage sampling circuit 300 specifically comprises: the second resistance R4, 3rd resistance R5 and the second amplifier, wherein, the voltage output end VOUT of the external described DC-DC module 200 of first end of described second resistance R4, second end of described second resistance R4 is connected with the first end of described 3rd resistance R5, and, the first end of described 3rd resistance R5 is connected with the positive input terminal of described second amplifier, second end of described 3rd resistance R5 is connected with the negative input end of described second amplifier, and, second end of the 3rd resistance R5 and the negative input end of described second amplifier ground connection respectively, the digital revolving die of the external described MCU module 100 of output terminal OUT2 of described second amplifier intends ADC pin.
The electric current of the current sampling circuit shown in Fig. 4 and voltage sampling circuit collection and simulating signal corresponding to voltage send to MCU module, and this current analog signal and voltage analog signal are converted to digital signal by MCU module; The electric current of acquisition is reduced to according to the enlargement factor of the first amplifier and the first resistance R3 the actual current that DC-DC module exports, equally, according to the enlargement factor of the second amplifier and the resistance of the second resistance R3 and the 3rd resistance R4, acquisition voltage is reduced to the virtual voltage of DC-DC module output, thus carry out subsequent arithmetic, wherein the resistance of the first resistance R3 is much smaller than the resistance of the second resistance R4 and the 3rd resistance R5.In the circuit connecting mode of Fig. 4, the resistance of the first resistance R3 is very little, can think that the first end of the second resistance R4 is directly connected with the voltage output end VOUT of DC-DC module when now the first end of the second resistance R4 is connected with second end of the first resistance R3.
In this power supply adaptor, described MCU module 100 is when sending resistance adjustment signal to solid relay 201, specifically for: send the signal reducing resistance to described solid relay 201, the signal of described reduction resistance is used to indicate the resistance reduction default value of described solid relay 201; Then described solid relay 201 specifically for: the signal according to described reduction resistance carries out resistance adjustment; DC-DC module 200 specifically for: according to the reduction of solid relay 201 resistance, output current after being adjusted rear output voltage and adjustment also exports, wherein, when the resistance of described solid relay 201 reduces, the output voltage of described DC-DC module 200 increases.
In the embodiment of the present invention, after the adjustment of DC-DC module, output voltage is greater than current output voltage.
Based on the preferred embodiment, the MCU module 100 of embodiment of the present invention output current after output voltage, current output current and adjustment after according to described current output voltage, adjustment, when determining that described DC-DC module 200 reality is the supply voltage of described power electronic equipment, specifically for:
Current power is calculated according to described current output voltage and described current output current;
The rear power of adjustment is calculated according to output current after output voltage after described adjustment and adjustment;
When the absolute value of the difference of power is less than or equal to predetermined power threshold value after determining described current power and described adjustment, determine that described current output voltage is the actual supply voltage for described power electronic equipment of described DC-DC module 200;
When the absolute value of the difference of power is greater than predetermined power threshold value after determining described current power and described adjustment, output voltage after described adjustment is also performed the operation of the current output voltage gathering DC-DC module as current output voltage.
The embodiment of the present invention, completes to unlatching in electronic equipment start process, or electronic equipment be in open state need power supply time, according to the adaptive voltage that should be electronic equipment and provide of electronic equipment power demand.Power after the adjustment that after the current power provided for electronic equipment by the current output voltage that compares DC-DC module and adjustment, output voltage provides for electronic equipment, if present output power is greater than predetermined power threshold value with the absolute value of the difference of the rear output power of adjustment, illustrate that electronic equipment needs larger power, now using the current output voltage of the magnitude of voltage of output voltage after adjustment as DC-DC module, and continue the output voltage gathering current output voltage and current output current and adjustment DC-DC module, and output voltage and the operation adjusting rear output current after collection adjustment.
Illustrate, such as, predetermined power threshold value is 2W, DC-DC module current output voltage is 16V, current output current is 2A, then current power is 32W, after adjustment, output voltage is 17V, after adjustment, output current is 3A, then after adjustment, power is 51W, now current power is 19W with the absolute value of the difference of the rear power of adjustment, be greater than predetermined power threshold value, now using 17V as current output voltage, and continue the output voltage increasing DC-DC module, after such as now adjustment, output voltage is 18V, then continue to calculate current power and the rear power of adjustment, and whether the difference absolute value both calculating is less than or equal to predetermined power threshold value, until when determining that the difference absolute value of the two is less than or equal to predetermined power threshold value, using actual as DC-DC for current output voltage be now the supply voltage of power electronic equipment, and send resistance increase signal to DC-DC module, thus make the output voltage of DC-DC module be adjusted to magnitude of voltage corresponding to current output voltage now and export to power electronic equipment.
Utilize the embodiment of the present invention, the actual supply voltage for power electronic equipment of DC-DC module can be determined, thus ensure as electronic equipment normal power supply.
Preferably, obtain the current output voltage of described DC-DC module 200 and current output current, specifically comprise:
The current output voltage of described DC-DC module 200 and current output current is repeatedly obtained in preset duration;
Preferably, to obtain after the adjustment of described DC-DC module 200 output current after output voltage and adjustment, specifically comprise:
Output current after output voltage and adjustment is repeatedly obtained after the adjustment of described DC-DC module 200 in described preset duration.
Concrete, because current sampling circuit and voltage sampling circuit are in real time to MCU module transmission voltage, current analog signal, the current output voltage that MCU module can select basis to be initially received and current output current, and output voltage output current rear with adjustment after the adjustment be initially received, calculate current power and the rear power of adjustment, preferably, obtain the current output voltage of DC-DC module and current output current in the following way: select repeatedly to obtain current output voltage in preset duration and the mean value calculating the output voltage of multi collect, select repeatedly to obtain current output voltage in preset duration and the mean value calculating the output current of multi collect, according to the mean value of current output voltage and the mean value calculation current power of current output current, such as, 4 current output voltage and current output current is gathered in preset duration.The mode obtaining output current after output voltage and adjustment after the adjustment of described DC-DC module is similar with the mode of the current output voltage and current output current that obtain DC-DC module, and be also according to the mean value of output voltage after adjustment and after exporting adjustment electric current mean value calculation adjustment after power.This power that MCU module can be made to obtain is more accurate, thus to make the DC-DC module determined actual be that the voltage of power electronic equipment is also more accurate.
Based on the inventive concept same with above-mentioned power supply adaptor, the embodiment of the present invention also provides a kind of method of power adapter, as shown in Figure 5, comprising:
Step 101, MCU module obtains the current output voltage of the DC-DC module that voltage sampling circuit gathers, and obtains the current output current of the DC-DC module that current sampling circuit gathers.
Step 102, sends resistance adjustment signal to described solid relay, and described solid relay is the divider resistance of the negative feedback voltage of described DC-DC module and is positioned at described DC-DC module inside.
Concrete, MCU module produces resistance adjustment signal and signal is sent to solid relay, exports different voltage to make DC-DC module according to the change in resistance of solid relay.
Step 103, output voltage after the adjustment of the DC-DC module that acquisition voltage sampling circuit gathers, and output current after obtaining the adjustment of the DC-DC module that current sampling circuit gathers.
Step 104, according to output current after output voltage after described current output voltage, current output current, adjustment and adjustment, determines the actual supply voltage for power electronic equipment of described DC-DC module.
Preferably, resistance adjustment signal is sent to described solid relay, specifically comprise: send the signal reducing resistance to described solid relay, the signal of described reduction resistance is used to indicate the resistance reduction default value of described solid relay, output current after being adjusted rear output voltage and adjustment to make described DC-DC module also exports, wherein, when the resistance of described solid relay reduces, the output voltage of described DC-DC module increases.
Preferably, obtain the current output voltage of the DC-DC module that voltage sampling circuit gathers, and obtain the current output current of the DC-DC module that current sampling circuit gathers, specifically comprise:
In preset duration, repeatedly obtain the current output voltage of the DC-DC module that voltage sampling circuit gathers, and in described preset duration, repeatedly obtain the current output current of the DC-DC module that current sampling circuit gathers.
Preferably, output voltage after the adjustment of the DC-DC module that acquisition voltage sampling circuit gathers, and output current after obtaining the adjustment of the DC-DC module that current sampling circuit gathers, specifically comprise:
Repeatedly obtain in described preset duration voltage sampling circuit gather DC-DC module adjustment after output voltage, and repeatedly obtain in described preset duration current sampling circuit gather DC-DC module adjustment after output current.
Preferably, as shown in Figure 6, according to output current after output voltage after described current output voltage, current output current, adjustment and adjustment, determine the actual supply voltage for power electronic equipment of described DC-DC module, specifically comprise:
Step 201, calculates current power according to described current output voltage and described current output current, and calculates the rear power of adjustment according to output current after output voltage after described adjustment and adjustment;
Step 202, judges whether the absolute value of the difference of the rear power of current power and adjustment is greater than predetermined power threshold value, if so, performs step 204, otherwise performs step 203.
Step 203, determines that described current output voltage is the actual supply voltage for described power electronic equipment of described DC-DC module.
Step 204, also performs the operation of the current output voltage obtaining DC-DC module as current output voltage using output voltage after described adjustment.
Concrete, when current power is greater than predetermined threshold value with the absolute value of the difference of the rear power of adjustment, illustrate that the power required for electronic equipment may be larger, therefore need output voltage after adjustment as current output voltage, and re-execute step 101-step 103, until after current power and adjustment, the absolute value of the difference of power is less than predetermined threshold value.
Utilize the method that the invention provides power supply adaptor and power adapter, there is following beneficial effect: by adding solid relay in the DC-DC module of existing power supply adapter, and the resistance of the solid relay in DC-DC module is adjusted by MCU module, realize the controlling and adjustment to the output voltage of DC-DC module, thus realize a power supply adaptor and can export different voltage in real time, do not need artificial participation, and then the power supply adaptor making the embodiment of the present invention provide can be the different power electronic equipment of required supply voltage, and can the output voltage of adaptive adjustment DC-DC module, thus be different power electronic equipment.
The present invention describes with reference to according to the process flow diagram of the method for the embodiment of the present invention, equipment (system) and computer program and/or block scheme.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block scheme and/or square frame and process flow diagram and/or block scheme and/or square frame.These computer program instructions can being provided to the processor of multi-purpose computer, special purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computing machine or other programmable data processing device produce device for realizing the function of specifying in process flow diagram flow process or multiple flow process and/or block scheme square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in process flow diagram flow process or multiple flow process and/or block scheme square frame or multiple square frame.
These computer program instructions also can be loaded in computing machine or other programmable data processing device, make on computing machine or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computing machine or other programmable devices is provided for the step realizing the function of specifying in process flow diagram flow process or multiple flow process and/or block scheme square frame or multiple square frame.
Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (10)
1. a power supply adaptor, for being different power electronic equipment, is characterized in that, comprise:
Micro-control unit MCU module, solid relay, DC-DC module and voltage sampling circuit and current sampling circuit, the ADC pin of MCU module is connected with described voltage sampling circuit and described current sampling circuit, described MCU module is connected by serial line interface with described solid relay, described voltage sampling circuit and current sampling circuit are connected with the voltage output end of described DC-DC module respectively, described solid relay is the divider resistance of the negative feedback voltage of described DC-DC module and is positioned at described DC-DC module inside, wherein
Voltage sampling circuit, for output voltage Real-time Feedback after the current output voltage of Real-time Collection DC-DC module and adjustment to MCU module;
Current sampling circuit, for current output current and the rear output current of adjustment of Real-time Collection DC-DC module, and Real-time Feedback is to MCU module;
MCU module, for obtaining the current output voltage of described DC-DC module and current output current; Resistance adjustment signal is sent to described solid relay; To obtain after the adjustment of described DC-DC module output current after output voltage and adjustment; According to output current after output voltage, current output current and adjustment after described current output voltage, adjustment, determine the actual supply voltage for described power electronic equipment of described DC-DC module;
Solid relay, carries out resistance adjustment for the resistance adjustment signal sent according to described MCU module;
DC-DC module, for exporting current output voltage and current output current; According to the adjustment of described solid relay resistance, export the rear output voltage of adjustment and output current after adjusting.
2. adapter as claimed in claim 1, it is characterized in that, described current sampling circuit, specifically comprises:
First resistance and the first amplifier, wherein, the first end of described first resistance is connected with the negative input end of described first amplifier, and, the voltage output end of the external described DC-DC module of first end of described first resistance, second end of described first resistance is connected with the positive input terminal of described first amplifier, the ADC pin of the external described MCU module of output terminal of described first amplifier.
3. adapter as claimed in claim 1, it is characterized in that, described voltage sampling circuit, specifically comprise: the second resistance, 3rd resistance and the second amplifier, wherein, the voltage output end of the external described DC-DC module of first end of described second resistance, second end of described second resistance is connected with the first end of described 3rd resistance, and, the first end of described 3rd resistance is connected with the positive input terminal of described second amplifier, second end of described 3rd resistance is connected with the negative input end of described second amplifier, the ADC pin of the external described MCU module of output terminal of described second amplifier.
4. adapter as claimed in claim 1, is characterized in that, described MCU module specifically for:
Send the signal reducing resistance to described solid relay, the signal of described reduction resistance is used to indicate the resistance reduction default value of described solid relay;
Then described solid relay specifically for: the signal according to described reduction resistance carries out resistance adjustment, and wherein, when the resistance of described solid relay reduces, the output voltage of described DC-DC module increases.
5. adapter as claimed in claim 4, is characterized in that, described MCU module when obtaining the current output voltage of described DC-DC module and current output current, specifically for:
The current output voltage of described DC-DC module and current output current is repeatedly obtained in preset duration;
Described MCU module obtain described DC-DC module adjustment after output voltage and adjustment after output current time, specifically for:
Output current after output voltage and adjustment is repeatedly obtained after the adjustment of described DC-DC module in described preset duration.
6. the adapter as described in claim 4 or 5, is characterized in that, described MCU module specifically for:
Current power is calculated according to described current output voltage and described current output current;
The rear power of adjustment is calculated according to output current after output voltage after described adjustment and adjustment;
When the absolute value of the difference of power is less than or equal to predetermined power threshold value after determining described current power and described adjustment, determine that described current output voltage is the actual supply voltage for described power electronic equipment of described DC-DC module;
When the absolute value of the difference of power is greater than predetermined power threshold value after determining described current power and described adjustment, output voltage after described adjustment is also performed the operation of the current output voltage gathering DC-DC module as current output voltage.
7. a method for power adapter, is characterized in that, comprising:
Micro-control unit MCU module obtains the current output voltage of the DC-DC module that voltage sampling circuit gathers, and obtains the current output current of the DC-DC module that current sampling circuit gathers;
Send resistance adjustment signal to solid relay, described solid relay is the divider resistance of the negative feedback voltage of described DC-DC module and is positioned at described DC-DC module inside;
Output voltage after the adjustment of the DC-DC module that acquisition voltage sampling circuit gathers, and output current after obtaining the adjustment of the DC-DC module that current sampling circuit gathers;
According to output current after output voltage after described current output voltage, current output current, adjustment and adjustment, determine the actual supply voltage for power electronic equipment of described DC-DC module.
8. method as claimed in claim 7, is characterized in that, sends resistance adjustment signal, specifically comprise to described solid relay:
The signal reducing resistance is sent to solid relay, the signal of described reduction resistance is used to indicate the resistance reduction default value of described solid relay, output current after being adjusted rear output voltage and adjustment to make described DC-DC module also exports, wherein, when the resistance of described solid relay reduces, the output voltage of described DC-DC module increases.
9. method as claimed in claim 8, is characterized in that, obtains the current output voltage of the DC-DC module that voltage sampling circuit gathers, and obtains the current output current of the DC-DC module that current sampling circuit gathers, and specifically comprises:
In preset duration, repeatedly obtain the current output voltage of the DC-DC module that voltage sampling circuit gathers, and in described preset duration, repeatedly obtain the current output current of the DC-DC module that current sampling circuit gathers;
Output voltage after the adjustment of the DC-DC module that acquisition voltage sampling circuit gathers, and output current after obtaining the adjustment of the DC-DC module that current sampling circuit gathers, specifically comprise:
Repeatedly obtain in described preset duration voltage sampling circuit gather DC-DC module adjustment after output voltage, and repeatedly obtain in described preset duration current sampling circuit gather DC-DC module adjustment after output current.
10. method as claimed in claim 8 or 9, it is characterized in that, according to output current after output voltage after described current output voltage, current output current, adjustment and adjustment, determine the actual supply voltage for power electronic equipment of described DC-DC module, specifically comprise:
Calculate current power according to described current output voltage and described current output current, and calculate the rear power of adjustment according to output current after output voltage after described adjustment and adjustment;
When the absolute value of the difference of power is less than or equal to predetermined power threshold value after determining described current power and described adjustment, determine that described current output voltage is the actual supply voltage for described power electronic equipment of described DC-DC module;
When the absolute value of the difference of power is greater than predetermined power threshold value after determining described current power and described adjustment, output voltage after described adjustment is also performed the operation of the current output voltage obtaining DC-DC module as current output voltage.
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| CN201510564214.6A CN105259965B (en) | 2015-09-07 | 2015-09-07 | A kind of method of power supply adaptor and power adapter |
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| CN201510564214.6A CN105259965B (en) | 2015-09-07 | 2015-09-07 | A kind of method of power supply adaptor and power adapter |
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| CN105259965B CN105259965B (en) | 2017-11-03 |
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| CN105259965B (en) | 2017-11-03 |
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