CN111224549B - Dual-operation-mode DC-DC converter and DC socket capable of adaptively controlling output voltage - Google Patents
Dual-operation-mode DC-DC converter and DC socket capable of adaptively controlling output voltage Download PDFInfo
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- CN111224549B CN111224549B CN202010084577.0A CN202010084577A CN111224549B CN 111224549 B CN111224549 B CN 111224549B CN 202010084577 A CN202010084577 A CN 202010084577A CN 111224549 B CN111224549 B CN 111224549B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/20—Conversion of dc power input into dc power output without intermediate conversion into ac by combination of static with dynamic converters; by combination of dynamo-electric with other dynamic or static converters
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/70—Structural association with built-in electrical component with built-in switch
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a DC-DC converter with double operation modes and a DC socket for adaptively controlling output voltage, which comprises: a low-voltage DC conversion circuit and a high-voltage DC conversion circuit connected in parallel; output capacitor COThe output ends of the low-voltage direct-current conversion circuit and the high-voltage direct-current conversion circuit are respectively connected in parallel; by comparing the required output voltage with the set threshold value, the dual-operation mode DC-DC converter can be controlled to work in a low-voltage operation mode or a high-voltage operation mode. The socket disclosed by the invention can be used for adaptively controlling voltage output, so that a household direct-current power supply system is prevented from being provided with a socket with multi-level voltage output, and the design cost of a direct-current household appliance and the household direct-current power supply system is integrally reduced.
Description
Technical Field
The invention relates to the technical field of direct current appliances and power electronics, in particular to a double-operation-mode DC-DC converter and a direct current socket for adaptively controlling output voltage.
Background
With the development of distributed energy, a low-voltage direct-current power supply system is gradually applied to household power supply, provides a direct-current power supply and needs a corresponding household direct-current socket as an intermediate interface for connecting the direct-current power supply and household appliances. Household low voltage dc power supply systems exist with multiple dc supply voltage levels, such as 380V and 48V, for efficient power supply. The inventor finds that the existing direct current socket can only output fixed single voltage, and the direct current power supply system with multiple voltage levels means that direct current sockets with different voltage level outputs need to be installed, so that the error plugging of household appliances is easily caused, and the appliance faults and the electricity utilization danger are caused. The direct current socket with the output voltage of more than 48V also has the risk of electric shock.
Furthermore, although in a domestic DC powered environment, DC home appliances eliminate the cost of AC-DC rectification. However, the DC household appliance still needs to be configured with a DC-DC converter to realize the conversion from the DC power voltage to the rated operating voltage of the appliance, which increases the volume of the household appliance and increases the production cost.
Therefore, it is required to develop a household dc outlet with multi-voltage level output, which has a function of automatically measuring and outputting a rated operating voltage of a household appliance.
Disclosure of Invention
In view of this, the present invention provides a dual-operation mode DC-DC converter and a DC socket for adaptively controlling an output voltage, which have functions of automatically measuring and outputting a rated operating voltage of a home appliance, and can solve the problem of safe and efficient power supply of multiple voltage levels in a home DC power supply environment.
In order to achieve the above purpose, in some embodiments, the following technical solutions are adopted in the present invention:
a dual operating mode DC-DC converter comprising: a low-voltage DC conversion circuit and a high-voltage DC conversion circuit connected in parallel; output capacitor COThe output ends of the low-voltage direct-current conversion circuit and the high-voltage direct-current conversion circuit are respectively connected in parallel; by comparing the required output voltage with the set threshold value, the dual-operation mode DC-DC converter can be controlled to work in a low-voltage operation mode or a high-voltage operation mode.
The DC-DC converter with the double operation modes in the scheme expands the voltage output range of the converter and improves the voltage bearing capacity and the power output capacity of the converter.
In other embodiments, the invention adopts the following technical scheme:
a direct current socket capable of adaptively controlling output voltage comprises the dual-operation mode DC-DC converter, wherein the dual-operation mode DC-DC converter can adaptively estimate the rated working voltage of electric equipment and output an approximate value of the rated working voltage.
After the household appliance is inserted into the socket, the socket can adaptively control voltage output according to the rated working voltage of the household appliance, and a DC-DC conversion module in the DC household appliance is omitted; the household direct current power supply system is not required to be provided with a socket with multi-stage voltage output.
In other embodiments, the invention adopts the following technical scheme:
a working method of a direct current socket capable of adaptively controlling output voltage comprises the following steps:
after the DC socket is inserted into the household appliance, the dual-operation mode DC-DC converter is started to output the capacitor COCharging, and increasing the output voltage;
when the output voltage rises to be higher than the undervoltage protection threshold value of the household appliance, the output current of the DC-DC converter rises suddenly;
the DC-DC converter detects the sudden rising current, captures the output voltage at the moment, and multiplies the output voltage by a set proportionality coefficient to obtain a rated working voltage estimated value of the household appliance;
and the DC-DC converter determines the operation mode by taking the estimated value as a reference voltage, and outputs the estimated value of the rated working voltage of the household appliance.
The invention has the beneficial effects that:
according to the household socket capable of adaptively controlling the output voltage, the mechanical spring switch is designed, when no household appliance is inserted, the output voltage of the socket is 0, and electric shock accidents caused by touching the socket are avoided; after the household appliance is inserted into the socket, the socket can adaptively control voltage output according to the rated working voltage of the household appliance, and a DC-DC conversion module in the DC household appliance is omitted;
the socket disclosed by the invention can be used for adaptively controlling voltage output, so that a household direct-current power supply system is prevented from being provided with a socket with multi-level voltage output, and the design cost of a direct-current household appliance and the household direct-current power supply system is integrally reduced.
The double-operation-mode DC-DC converter expands the voltage output range of the converter and improves the voltage bearing capacity and the power output capacity of the converter.
Drawings
Fig. 1 is a schematic diagram of an internal structure of a household dc outlet capable of adaptively controlling an output voltage according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an internal structure of a low-voltage DC conversion circuit of a dual-operation mode DC-DC converter according to an embodiment of the present invention;
fig. 3 is a schematic diagram of an internal structure of a high-voltage DC conversion circuit of a dual-operation-mode DC-DC converter according to an embodiment of the present invention;
fig. 4 is a schematic diagram of an internal structure of a mechanical spring relay switch according to an embodiment of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The embodiments and features of the embodiments of the present invention may be combined with each other without conflict.
In one or more embodiments, a dual operation mode DC-DC converter is disclosed, comprising: a low-voltage DC conversion circuit and a high-voltage DC conversion circuit connected in parallel; output capacitor COAnd the output ends of the low-voltage direct-current conversion circuit and the high-voltage direct-current conversion circuit are respectively connected in parallel.
The low-voltage direct-current conversion circuit is connected with the input side of the high-voltage direct-current conversion circuit in parallel, and shares a direct-current power supply positive lead and a direct-current power supply negative lead; the low-voltage DC conversion circuit is connected in parallel with the output side of the high-voltage DC conversion circuit.
Specifically, referring to fig. 2, the low voltage dc conversion circuit includes: a buck type low-power DC conversion circuit and a resonant DC conversion circuit. The buck type low-power direct-current conversion circuit input interface is connected with a household direct-current power supply and comprises an IGBT switch, a low-power inductor L1, a low-power capacitor C1 and a diode D1, the low-power capacitor C1 is connected with a bleeder resistor R1 in parallel, the resistance value of the bleeder resistor is about 10k omega, and power supply loss can be ignored. The LLC resonant conversion circuit is formed by sequentially connecting a half-bridge MOSFET circuit, an LLC resonant circuit, a high-frequency transformer and a half-bridge diode rectification current in series. The turn ratio Np to Ns of the high-frequency transformer is 8 to 1, the rated working frequency of the two MOSFET switches is 50kHz, and the rated working frequency of the IGBT switch is 20 kHz. The low-voltage direct-current conversion circuit is used for supplying power to household electrical equipment with the working voltage of 5V to 48V. When the low-voltage direct-current conversion circuit works, the dual-operation mode DC-DC converter is in a low-voltage operation mode.
Referring to fig. 3, the high voltage dc conversion circuit includes: a buck-type high-power conversion circuit. The buck type high-power direct-current conversion circuit and the buck type low-power direct-current conversion circuit share one IGBT switch, and the high-power inductor L2 is connected with the IGBT switch in series. The high-voltage branch conversion circuit is used for supplying power to household electrical appliance equipment with the working voltage of 48V to 400V. When the high-voltage direct-current conversion circuit works, the dual-operation mode DC-DC converter is in a high-voltage operation mode.
The double-pole double-throw switch S2 is connected in series with the input sides of the two DC conversion circuits; the double-pole double-throw switch S3 is connected in series with the output sides of the two conversion circuits. The double-pole double-throw switches S2 and S3 operate in synchronization, S2 controls switching of the inverter input side circuit, and S3 controls switching of the inverter output side circuit. By controlling the actions of S2, S3, the dual operation mode DC-DC converter can be switched between a high voltage operation mode and a low voltage operation mode.
The dual operation mode DC-DC converter of the present embodiment has two operation modes: 1) when the output voltage is lower than the set threshold value, controlling S2 and S3 to act, turning on the low-voltage direct-current conversion circuit, turning off the high-voltage direct-current conversion circuit, and entering a low-voltage operation mode; 2) when the output voltage is higher than the set threshold value, S2 and S3 are controlled to operate, the high-voltage direct-current conversion circuit is switched on, the low-voltage direct-current conversion circuit is switched off, and the high-voltage operation mode is entered.
Example two
In one or more embodiments, a direct current outlet with adaptive output voltage control is disclosed, which comprises the dual operation mode DC-DC converter described in the first embodiment.
In a specific embodiment, the socket application scene is that household power is supplied under a medium-low voltage direct current power supply system, a power supply accessed to a household is different from a common single-phase alternating current power supply, but a direct current power supply with the amplitude of 400V is divided into a positive pole inlet wire and a negative pole inlet wire, and as the grounding mode of the direct current power supply system is in floating connection, a ground wire is not provided.
Referring to fig. 1, a household direct current outlet adaptively controlling an output voltage includes: the device comprises a positive electrode slot, a negative electrode slot, a mechanical spring relay switch, a double-operation mode DC-DC converter, a positive electrode current conductor and a negative electrode current conductor.
The positive pole slot and the negative pole slot are positioned at the connection part of the socket and the electric appliance; the mechanical spring relay switch is positioned on the rear side of the bottom of the positive slot; the double-operation mode DC-DC converter is positioned at the rear side of the mechanical spring relay switch and is provided with a positive electrode output port, a negative electrode output port, a positive electrode input port and a negative electrode input port, wherein a positive electrode wire inlet is connected with a positive electrode wire of a household direct current power supply, and a negative electrode wire inlet is connected with a negative electrode wire of the household direct current power supply;
the positive current conductor is arranged on the side surface of the positive slot and used for connecting the positive slot with a positive output port of the double-operation-mode DC-DC converter; and the negative current conductor is arranged on the side surface of the negative slot and is used for connecting the negative slot with a negative output port of the double-operation-mode DC-DC converter.
Referring to fig. 4, the positive electrode slot has a movable sliding sheet therein, which can move horizontally along the slot wall. When no plug is inserted into the slot, the moving slide is in the middle position of the slot. Of course, the movable sliding piece can also be arranged in the negative pole slot according to the requirement.
Mechanical spring relay switch specifically includes: single-pole double-throw switch S1, a discharge resistor, a mechanical spring and a relay signal generator.
Wherein the single pole double throw switch S1 includes: the switch circuit and the switch blade, wherein one end of the switch circuit is connected with the positive current conductor; the other end of the switch circuit has two contacts: a first contact and a second contact; the first contact is connected with one end of the bleeder resistor, and the other end of the bleeder resistor is connected with the negative current conductor; the bleeder resistor is used for returning to zero the output voltage of the socket after the household appliance is pulled out of the socket. The second contact constitutes an open circuit.
If the movable slide piece is disposed in the negative electrode slot, the bleed-off resistor is connected to the positive electrode current conductor.
One end of the mechanical spring is connected with the movable sliding piece, when the movable sliding piece moves towards the bottom of the slot, the mechanical spring is compressed, and when the movable sliding piece moves towards the slot opening, the mechanical spring extends. The other end of the mechanical spring is connected with the switch blade of the single-pole double-throw switch S1.
The switch blade has three states according to the compression condition of the mechanical spring:
1) when no plug is inserted into the slot, the sliding sheet is moved to enable the mechanical spring to extend, the switch blade is contacted with the first contact, and the bleeder resistor is connected with the double-operation-mode DC-DC converter;
2) when the plug is inserted into the slot, the sliding sheet is moved to compress the mechanical spring, the switch blade leaves the first contact, and the bleeder resistor is disconnected with the double-operation-mode DC-DC converter;
3) when the plug is inserted into the bottom of the socket, the mechanical spring compresses to make the switch blade contact the second contact.
And the relay signal generator sends corresponding signals to the double-operation-mode DC-DC converter control module according to the contact conditions of the first contact and the second contact with the switch blade. When the second contact is in contact with the S1 blade, the relay signal generator sends a starting signal, and the double-operation-mode DC-DC converter outputs working voltage; when the first contact is in contact with the S1 blade, the relay signal generator sends a stop signal, and the dual-operation-mode DC-DC converter stops outputting the working voltage.
When the plug of the household appliance is not inserted into the socket, the output voltage of the socket is0V. When the socket is inserted into the socket, the bleeder resistor R is moved by the movable sliding sheetBAnd output capacitor COAnd disconnecting until the plug contacts the bottom switch blade of the slot to contact the second contact, and starting the dual-operation-mode DC-DC converter to output voltage.
When the household appliance does not need to work and the plug is pulled out, the sliding sheet is moved to make the switch blade leave the second contact and finally contact the first contact, and the bleeder resistor RBAnd output capacitor COThe parallel connection is adopted, and the capacitor can rapidly discharge the stored electric energy to reduce the voltage of the capacitor to 0V. RBThe resistance is 10 omega. If the household appliance still works in a live state in the process of pulling out the socket, the working voltage of the household appliance is rapidly reduced after the blade contacts the first contact, and electric arcs are prevented from being generated after the household appliance is pulled out of the socket.
If the double-operation mode DC-DC converter is in a high-voltage operation mode, after the household appliance is unplugged, the S1 switch blade contacts the first contact, the first contact sends a signal to the double-pole double-throw switches S2 and S3 through the relay signal generator, and the actions of S2 and S3 control the DC-DC converter to be switched to the low-voltage DC conversion circuit.
According to the household socket capable of adaptively controlling the output voltage, the mechanical spring switch is designed, when no household appliance is inserted, the output voltage of the socket is 0, and electric shock accidents caused by touching the socket are avoided.
In this embodiment, the dual-operation mode DC-DC converter has the capability of adaptively estimating the rated operating voltage of the electrical appliance and changing the output voltage. The function of adaptively changing the output voltage makes use of an undervoltage protection system in the household appliance. In the estimation process of the rated working voltage of the household appliance, the dual-operation mode DC-DC converter selects a low-voltage operation mode output or a high-voltage operation mode output.
When the rated working voltage of the plugged household appliance is lower than the running mode threshold value UsAnd when the low-voltage direct current conversion circuit is in a low-voltage operation mode, the low-voltage direct current conversion circuit is controlled to be switched on, and the high-voltage direct current conversion circuit is controlled to be switched off.
When the rated working voltage of the plugged household appliance is higher than the running mode threshold value UsTime, control the high voltage DC currentAnd switching on the switching circuit, switching off the low-voltage direct-current conversion circuit, and entering a high-voltage operation mode.
In this embodiment, the operation mode threshold U is selectedsIs 48V. Of course, other values can be selected by those skilled in the art according to actual needs.
In other embodiments, a method of operating a dc outlet with adaptive output voltage control is disclosed, comprising:
1) after the household appliance is inserted into the direct current socket, the double-operation mode DC-DC converter is started, the initial operation mode is a low-voltage operation mode, the output capacitor Co is rapidly charged, and the output voltage rapidly rises;
2) when the output voltage is lower than the under-voltage protection threshold value of the household appliance, the household appliance is under-voltage protected, and the output current of the DC-DC converter is approximate to zero;
3) if the output voltage rises to be lower than the maximum output voltage 48V of the low-voltage direct-current conversion circuit and is higher than the undervoltage protection threshold value of the household appliance, the household appliance is not protected by undervoltage, the output current of the double-operation mode DC-DC converter rises suddenly, the low-voltage operation mode is kept, and the step (5) is switched to; if the output voltage rises to 48V and the output current of the converter does not obviously protrude, controlling the double-pole double-throw switches S2 and S3 to switch to a high-voltage operation mode, and turning to the step (4);
4) if the output voltage rises to be lower than the maximum output voltage 400V of the high-voltage direct-current conversion circuit and higher than the under-voltage protection threshold value of the household appliance, the household appliance is not protected by the under-voltage, the output current of the double-operation mode DC-DC converter rises suddenly, the high-voltage operation mode is maintained, and the step (5) is carried out;
5) detecting the sudden rising current by the double-operation mode DC-DC converter, capturing the output voltage UO at the moment, and multiplying the output voltage UO by a certain proportional coefficient to obtain an estimated value UR of the rated working voltage of the household appliance;
6) and the double-operation-mode DC-DC converter takes UR as a reference voltage and outputs an approximate value of the rated working voltage of the household appliance.
DC-DC converter compares reference voltage with operation mode threshold UsSwitching the operation mode and controlling the IGBT to be turned onAnd off to output the reference voltage.
After the household appliance is inserted into the socket, the socket can adaptively control voltage output according to the rated working voltage of the household appliance, and a DC-DC conversion module in the DC household appliance is omitted.
The socket disclosed by the embodiment of the invention can adaptively control voltage output, avoids the condition that a household direct current power supply system is provided with a socket with multi-level voltage output, and integrally reduces the design cost of direct current household appliances and the household direct current power supply system.
Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.
Claims (7)
1. A working method of a direct current socket capable of adaptively controlling output voltage is characterized by comprising the following steps:
after the DC socket is inserted into the household appliance, the dual-operation mode DC-DC converter is started to output the capacitor COCharging, and increasing the output voltage;
when the output voltage rises to be higher than the undervoltage protection threshold value of the household appliance, the output current of the DC-DC converter rises suddenly;
the DC-DC converter detects the sudden rising current, captures the output voltage at the moment, and multiplies the output voltage by a set proportionality coefficient to obtain a rated working voltage estimated value of the household appliance;
the DC-DC converter takes the estimated value as a reference voltage, determines an operation mode and outputs the estimated value of the rated working voltage of the household appliance;
the positive input end of the double-operation-mode DC-DC converter is connected with the positive electrode of the household direct-current power supply, the negative input end of the double-operation-mode DC-DC converter is connected with the negative electrode of the household direct-current power supply, the positive output end of the double-operation-mode DC-DC converter is connected with the positive current conductor, and the negative output end of the double-operation-mode DC-DC converter is connected;
when the required output voltage is lower than a set threshold value, controlling the low-voltage direct-current conversion circuit to be conducted, and controlling the high-voltage direct-current conversion circuit to be disconnected to enter a low-voltage operation mode;
when the required output voltage is higher than a set threshold value, controlling the high-voltage direct-current conversion circuit to be conducted, and controlling the low-voltage direct-current conversion circuit to be disconnected to enter a high-voltage operation mode;
the DC outlet includes: a positive electrode slot and a negative electrode slot; a movable sliding sheet is arranged in one slot and connected with a mechanical spring switch; the mechanical spring switch comprises a first contact and a second contact; when the movable sliding sheet is located at a first position close to the notch of the positive slot, the switch is contacted with the first contact; when the movable sliding sheet is located at a second position far away from the notch of the positive slot, the switch is contacted with the second contact;
when the switch is in contact with the second contact, a starting signal is sent by the relay signal generator, and the DC-DC converter outputs working voltage; when the switch is in contact with the first contact, the relay signal generator sends a stop signal, and the DC-DC converter stops outputting the working voltage.
2. A dc outlet with adaptive output voltage control, operated by the method of claim 1.
3. A dc outlet for adaptively controlling output voltage as set forth in claim 2, comprising: a low-voltage DC conversion circuit and a high-voltage DC conversion circuit connected in parallel; output capacitor COThe output ends of the low-voltage direct-current conversion circuit and the high-voltage direct-current conversion circuit are respectively connected in parallel; by comparing the required output voltage with the set threshold value, the dual-operation mode DC-DC converter can be controlled to work in a low-voltage operation mode or a high-voltage operation mode.
4. The dc outlet of claim 2, wherein said low voltage dc conversion circuit comprises: the buck type low-power direct current conversion circuit and the LLC resonant conversion circuit are connected in series;
the buck type low-power direct-current conversion circuit comprises a series branch of an IGBT switch and an inductor L1, and a capacitor C1 which is connected in parallel; a bleeder resistor R1 is connected in parallel with the two ends of the capacitor C1;
the LLC resonance conversion circuit comprises a half-bridge MOSFET circuit, an LLC resonance circuit, a high-frequency transformer and a half-bridge diode rectification circuit which are sequentially connected in series.
5. The dc outlet of claim 2, wherein said high voltage dc conversion circuit comprises: an IGBT switch and an inductor L2 connected in series.
6. An adaptive output voltage controlled dc outlet according to claim 2, wherein the low voltage dc converter circuit and the high voltage dc converter circuit share an IGBT switch, after which the IGBT switch, and an output capacitor COPreviously, double pole double throw switches S2 and S3 were connected, respectively; the on-off of the low-voltage direct-current conversion circuit and the high-voltage direct-current conversion circuit is realized by controlling the on-off of the knife switches of the double-pole double-throw switches S2 and S3.
7. An adaptively controlled output voltage DC outlet according to claim 2, comprising an adaptively controlled output voltage DC outlet according to any of claims 3 to 6, wherein the dual operation mode DC-DC converter is capable of adaptively estimating a rated operating voltage of the electric device and outputting an approximation of the rated operating voltage.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010084577.0A CN111224549B (en) | 2020-02-10 | 2020-02-10 | Dual-operation-mode DC-DC converter and DC socket capable of adaptively controlling output voltage |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010084577.0A CN111224549B (en) | 2020-02-10 | 2020-02-10 | Dual-operation-mode DC-DC converter and DC socket capable of adaptively controlling output voltage |
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| Publication Number | Publication Date |
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| CN111224549A CN111224549A (en) | 2020-06-02 |
| CN111224549B true CN111224549B (en) | 2021-04-30 |
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| CN114244119A (en) * | 2022-01-21 | 2022-03-25 | 珠海格力电器股份有限公司 | Direct current socket and power supply method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107196102A (en) * | 2017-06-24 | 2017-09-22 | 李勇 | A kind of safety socket and the plug supporting with it |
| CN207368884U (en) * | 2017-10-27 | 2018-05-15 | 深圳市保益新能电气有限公司 | A kind of two-way Sofe Switch DC transfer circuit of wide scope |
| CN108718156A (en) * | 2018-06-27 | 2018-10-30 | 南京航空航天大学 | A kind of adjustable constant-power direct-current power supply system of output voltage wide scope |
| CN209389937U (en) * | 2019-02-25 | 2019-09-13 | 洛阳隆盛科技有限责任公司 | A kind of voltage-dropping power supply circuit based on the conversion of two-stage cascade voltage |
-
2020
- 2020-02-10 CN CN202010084577.0A patent/CN111224549B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107196102A (en) * | 2017-06-24 | 2017-09-22 | 李勇 | A kind of safety socket and the plug supporting with it |
| CN207368884U (en) * | 2017-10-27 | 2018-05-15 | 深圳市保益新能电气有限公司 | A kind of two-way Sofe Switch DC transfer circuit of wide scope |
| CN108718156A (en) * | 2018-06-27 | 2018-10-30 | 南京航空航天大学 | A kind of adjustable constant-power direct-current power supply system of output voltage wide scope |
| CN209389937U (en) * | 2019-02-25 | 2019-09-13 | 洛阳隆盛科技有限责任公司 | A kind of voltage-dropping power supply circuit based on the conversion of two-stage cascade voltage |
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| CN111224549A (en) | 2020-06-02 |
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