An automatically protected power adapter and its control method

Abstract

The present invention provides an automatically protected power adapter and a control method thereof, relating to the technical field of electric energy conversion. The usage method of the automatically protected power adapter specifically includes the following steps: S1. Charging connection, S2. Voltage and current determination and conversion, S3. Channel selection, S4. Channel frequency conversion and voltage transformation, S5. Filtering, rectifying and correcting, S6. Output. By utilizing the connection conversion of the dual-channel mode from instant connection to the stable process, protecting the reaction channels for the high-frequency and high-voltage output current triggered instantaneously during connection, and switching to the trigger channel after tending to be stable, and also triggering the dual-channel mechanism for automatic protection when powering off in reverse, it can be excluded from overcurrent protection until the output current further increases during true overload and then enters the overcurrent protection program, which can prevent the power adapter from accidentally triggering overcurrent protection during instant connection and effectively achieve the purpose of output protection.

Description

Technical Field

[0001] The present invention relates to the technical field of electric energy conversion, and specifically to an automatically protected power adapter and its control method. Background Art

[0002] A power adapter is a power supply conversion device for small portable electronic devices and electronic appliances. Generally, it consists of components such as a housing, a transformer, an inductor, a capacitor, a control chip, and a circuit board. Its working principle is to convert AC input into DC output and supply power to small portable electronic devices and electronic appliances, or charge their power supply; power adapters can be divided into wall-mounted type and desktop type according to the connection method. Power adapters are widely used in various electronic devices.

[0003] Traditional power adapters only serve as charging tools for electronic devices. Generally, after people finish charging with a power adapter, they habitually do not unplug the plug of the power adapter. There is a circuit inside the power adapter that consumes electric energy, and it cannot protect the connection channel alone, with low functionality of the protection channel. At the same time, the input current connected instantaneously by the power adapter is relatively large, easily approaching or even exceeding the overcurrent protection point, resulting in misoperation of the protection mechanism. Summary of the Invention

[0004] (1) Technical Problems to be Solved

[0005] In view of the deficiencies of the prior art, the present invention provides an automatically protected power adapter and its control method, which solves the problems that traditional power adapters cannot protect the connection channel alone, with low functionality of the protection channel, and at the same time, the input current connected instantaneously by the power adapter is relatively large, easily approaching or even exceeding the overcurrent protection point, resulting in misoperation of the protection mechanism.

[0006] (2) Technical Solutions

[0007] To achieve the above objectives, the present invention is realized through the following technical solutions: A usage method of an automatically protected power adapter specifically includes the following steps:

[0008] S1. Charging Connection

[0009] Connect the connection ends at both ends of the adapter to complete the circuit connection.

[0010] S2. Voltage and Current Judgment Conversion

[0011] Judge the voltage and current according to the energized end of the connection and perform judgment and conversion.

[0012] S3. Channel Selection

[0013] After determining and converting the voltage and current, and based on the selected channel for connection. At the same time, after the channel is established, the channel is selected again according to the continuously generated data for secondary optimization and decision-making;

[0014] S4. Channel frequency conversion and voltage transformation

[0015] After the channel selection is completed, according to the maximum power value of the device connected to the other end of the circuit, the current and voltage in the channel are subjected to frequency conversion and voltage transformation;

[0016] S5. Filtering, rectifying and correcting

[0017] According to the completed frequency conversion and voltage transformation circuit, it is corrected based on rectification and filtering to make it at the optimal power value;

[0018] S6. Output

[0019] Finally, the circuit completes the output connection.

[0020] Preferably, the adapter is monitored and inspected in real time through a variety of protection modules in the main system end, and decision-making analysis and execution are carried out according to the data of the variety of protection modules.

[0021] Preferably, an automatically protected power adapter includes an adapter body. The adapter body includes a voltage transformation control unit, a selection and conversion unit, and a main board control unit. The voltage transformation control unit includes a switching control unit and a dual-channel frequency conversion and voltage transformation unit. The selection and conversion unit is connected with an interface. The voltage transformation control unit is connected with a status display unit, a reset unit, and a power conversion unit. The main board control unit includes a main system end and a filtering unit. The main board control unit is connected with an adapter wiring terminal;

[0022] The switching control unit includes a DC conversion module and an AC conversion module. The dual-channel frequency conversion and voltage transformation unit includes a first channel unit and a second channel unit. Among them, both the DC conversion module and the AC conversion module are connected with the selection and conversion unit, and the selection and conversion unit includes a circuit identification unit of the interface. The first channel unit and the second channel unit are two parallel and single co-start channels.

[0023] Preferably, the voltage transformation control unit is connected with the main board control unit, and the main board control unit is connected with the status display unit, the reset unit, and the power conversion unit.

[0024] Preferably, the main system end includes an overvoltage protection module, an overcurrent protection module, a short-circuit protection module, a temperature protection module, a module control unit, and a selection output module. Among them, the main system end conducts program generation control based on a single-chip microcomputer main board.

[0025] Preferably, the filtering unit includes a first rectifying and filtering module, a second rectifying and filtering module, a capacitor module, an inductor module, a controllable switch module, and an automatic shutdown module, wherein the first rectifying and filtering module and the second rectifying and filtering module are used to convert the input power supply into a DC power supply and filter out high-frequency noise and interference in the input power supply.

[0026] Preferably, the capacitor module is respectively connected to the output ends of the first rectifying and filtering module and the second rectifying and filtering module, and the capacitor module is connected to the series branch of the inductor module and the controllable switch module.

[0027] (III) Beneficial effects

[0028] The present invention provides an automatically protected power adapter and its control method. It has the following beneficial effects:

[0029] 1. The present invention provides an automatically protected power adapter and its control method. By adding two conversion modules inside the adapter, the two conversion modules analyze and convert different currents respectively. At the same time, based on dual-channel conversion, using the connection conversion of the dual-channel mode from instant connection to stable process, the protection of the reaction channel is carried out on the high-frequency and high-voltage output current triggered instantaneously during connection, and it is converted into the trigger channel after tending to be stable. Also, when power is cut off reversely, the dual-channel mechanism is triggered for automatic protection, which can exclude it from overcurrent protection. It is not until the output current further increases during true overload that the overcurrent protection program is entered. This can prevent the power adapter from accidentally triggering overcurrent protection during instant connection and effectively achieve the purpose of output protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic structural framework diagram of the present invention;

[0031] Figure 2 is a schematic structural flow diagram of the voltage conversion control unit of the present invention;

[0032] Figure 3 is a schematic structural diagram of the main system end of the present invention;

[0033] Figure 4 is a schematic structural diagram of the filtering unit of the present invention;

[0034] Figure 5 is a schematic flow diagram of the present invention.

[0035] Among them, 1. Adapter body; 2. Voltage conversion control unit; 3. Switching control unit; 4. Selection and conversion unit; 5. Interface; 6. Status display unit; 7. Reset unit; 8. Power conversion unit; 9. Main system end; 10. Filter unit; 11. Motherboard control unit; 12. Adapter wiring terminal; 13. Dual-channel variable frequency and voltage conversion unit; 14. DC conversion module; 15. First channel unit; 16. Second channel unit; 17. AC conversion module; 18. Overvoltage protection module; 19. Overcurrent protection module; 20. Short-circuit protection module; 21. Temperature protection module; 22. Module control unit; 23. Selection output module; 24. First rectification and filtering module; 25. Second rectification and filtering module; 26. Capacitor module; 27. Inductor module; 28. Controllable switch module; 29. Automatic shutdown module. Specific implementation mode

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0037] Embodiment:

[0038] As Figures 1-5 shown, the embodiment of the present invention provides a usage method of a power adapter with automatic protection:

[0039] S1. Charging connection

[0040] Connect the connection terminals at both ends of the adapter to complete the circuit connection; that is, connect an external connection wire from the interface 5 end, and the wire is equipped with a plug, and the adapter wiring terminal 12 is used for power-on connection of the device;

[0041] S2. Voltage and current determination and conversion

[0042] Determine and convert the voltage and current according to the connected power-on end; based on the selection and conversion unit 4 connected to the interface 5, analyze and determine the input voltage and current, and use the conversion module to complete the conversion of the current;

[0043] S3. Channel selection

[0044] After determining and converting the voltage and current, and based on the selected channel for connection, and after the channel is established, re-select the channel according to the continuously generated data for secondary optimization and decision-making;

[0045] After the circuit is connected, the first channel unit 15 first performs connection processing. The maximum load power of the first channel unit 15 ensures that it will not be damaged, and there is no overcurrent protection mechanism inside to ensure that the instantaneous high voltage at the moment of instantaneous connection is not triggered. After the connection reaches a stable state, it is switched to the second channel unit 16 for continuous supply. The second channel unit 16 is monitored based on multiple protection modules of the main system terminal 9 and includes an overcurrent protection mechanism to protect it;

[0046] S4. Channel frequency conversion and voltage transformation

[0047] After the channel selection is completed, according to the maximum power value of the device connected to the other end of the circuit, the frequency conversion and voltage transformation of the current and voltage in the channel are performed;

[0048] After the channel selection process is completed, the frequency conversion and voltage transformation in the channel are completed based on modules such as transformers, current conversion modules, current boost, and current step-down to ensure the safety of the output; among them, it is monitored and inspected in real time based on multiple protection modules in the main system terminal 9, and decision-making analysis and execution are performed according to the data of multiple protection modules;

[0049] S5. Filtering, rectification, and correction

[0050] According to the completed frequency conversion and voltage transformation circuit, it is corrected based on rectification and filtering to make it at the optimal power value;

[0051] At this time, the current in the channel is further eliminated of high-frequency noise and interference by rectification and filtering, further improving the automatic safety performance of the adapter;

[0052] S6. Output

[0053] Finally, the circuit completes the output connection.

[0054] Based on the connection conversion of the dual-channel mode from instantaneous connection to stable process described above, the reaction channel is protected for the high-frequency high-voltage output current triggered instantaneously during connection, and after it tends to be stable, it is switched to the trigger channel. Also, when power is cut off reversely, the dual-channel mechanism is triggered for automatic protection, which can exclude it from overcurrent protection. It is not until the output current further increases during true overload that it enters the overcurrent protection program, which can prevent the power adapter from accidentally triggering overcurrent protection during instantaneous connection and effectively achieve the purpose of output protection.

[0055] In this embodiment, the method is used based on a power adapter with automatic protection. The power adapter includes an adapter body 1, and the adapter body 1 includes a voltage conversion control unit 2, a selection conversion unit 4, and a main board control unit 11. The voltage conversion control unit 2 includes a switching control unit 3 and a dual-channel frequency conversion and voltage conversion unit 13. The switching control unit 3 has a two-way program for inverted conversion in two processes: input-output and step-down-power-off. The selection conversion unit 4 is connected to an interface 5, and the interface 5 includes the connection of an external wire. After being connected to the interface 5 through the external wire, the circuit is connected based on the plug of the external wire. The voltage conversion control unit 2 is connected to a status display unit 6, a reset unit 7, and a power conversion unit 8. The status display unit 6 includes displays for charging, full charge, standby, and power-off modes. The reset unit 7 performs reset and restart for power-off and connection. The power conversion unit 8 performs selective analysis and determination conversion on it. The main board control unit 11 includes a main system terminal 9 and a filtering unit 10. The main board control unit 11 is connected to an adapter wiring terminal 12, and the adapter wiring terminal 12 is used to connect to the port of the device for use;

[0056] The switching control unit 3 includes a DC conversion module 14 and an AC conversion module 17. The dual-channel frequency conversion and voltage conversion unit 13 includes a first channel unit 15 and a second channel unit 16, which realizes the protection conversion use of two channels. The DC conversion module 14 and the AC conversion module 17 are both connected to the selection conversion unit 4, and the selection conversion unit 4 includes a circuit identification unit for the interface 5. The first channel unit 15 and the second channel unit 16 are two parallel and single co-start channels, that is, only one channel is started for use at the same time.

[0057] The voltage conversion control unit 2 is connected to the main board control unit 11, and the main board control unit 11 is connected to the status display unit 6, the reset unit 7, and the power conversion unit 8. At this time, the main board control unit 11 can perform linkage analysis on the voltage conversion control unit 2 and issue operation instructions for the status display unit 6, the reset unit 7, and the power conversion unit 8 to complete the linkage of various instructions.

[0058] The main system terminal 9 includes an overvoltage protection module 18, an overcurrent protection module 19, a short-circuit protection module 20, a temperature protection module 21, a module control unit 22, and a selection output module 23. The main system terminal 9 performs program generation control based on a single-chip microcomputer main board. The overvoltage protection module 18 is used to detect whether the voltage of the input power supply exceeds the set safe range; the overcurrent protection module 19 is used to detect whether the output current exceeds the set safe range; the short-circuit protection module 20 is used to monitor whether there is a short-circuit fault at the output port; the temperature protection module 21 is used to monitor the temperature inside the adapter; the module control unit 22 is used to control the on-off state of the switching device to realize the protection function; the selection output module 23 is used to output the protected power to external devices.

[0059] The filtering unit 10 includes a first rectifying and filtering module 24, a second rectifying and filtering module 25, a capacitor module 26, an inductor module 27, a controllable switch module 28, and an automatic shutdown module 29, wherein the first rectifying and filtering module 24 and the second rectifying and filtering module 25 are used to convert the input power supply into a DC power supply and filter out high-frequency noise and interference in the input power supply.

[0060] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for using an automatically protected power adapter, characterized in that, it specifically includes the following steps: S1. Charging connection Connect the connection ends at both ends of the adapter to complete the circuit connection; S2. Voltage and current determination and conversion Determine the voltage and current according to the energized end of the connection and perform determination and conversion; S3. Channel selection After determining and converting the voltage and current, and based on the selected channel for connection. At the same time, after the channel is established, re-select the channel according to the continuously generated data for secondary optimization and decision-making; S4. Channel frequency conversion and voltage transformation After the channel selection is completed, according to the maximum power value of the device connected to the other end of the circuit, perform frequency conversion and voltage transformation of the current and voltage in the channel; S5. Filtering, rectification and correction Based on the completed frequency conversion and voltage transformation circuit, perform rectification and filtering on it for correction to make it at the optimal power value; S6. Output Finally, the circuit completes the output connection; Among them, the adapter includes an adapter body (1), the adapter body (1) includes a voltage conversion control unit (2), a selection and conversion unit (4) and a main board control unit (11), the voltage conversion control unit (2) includes a switching control unit (3) and a dual-channel frequency conversion and voltage transformation unit (13), the selection and conversion unit (4) is connected with an interface (5), the voltage conversion control unit (2) is connected with a status display unit (6), a reset unit (7) and a power conversion unit (8), the main board control unit (11) includes a main system terminal (9) and a filtering unit (10), and the main board control unit (11) is connected with an adapter wiring terminal (12); The switching control unit (3) includes a DC conversion module (14) and an AC conversion module (17), the dual-channel frequency conversion and voltage transformation unit (13) includes a first channel unit (15) and a second channel unit (16), wherein both the DC conversion module (14) and the AC conversion module (17) are connected with the selection and conversion unit (4), and the selection and conversion unit (4) includes a circuit identification unit of the interface (5), and the first channel unit (15) and the second channel unit (16) are two parallel and single co-start channels; The adapter conducts real-time monitoring and inspection on it through various protection modules in the main system terminal, and makes decision analysis and execution according to the data of various protection modules.

2. The method for using an automatically protected power adapter according to claim 1, characterized in that: The voltage conversion control unit (2) is connected with the main board control unit (11), and the main board control unit (11) is connected with the status display unit (6), the reset unit (7) and the power conversion unit (8).

3. The method for using an automatically protected power adapter according to claim 1, characterized in that: The main system terminal (9) includes an overvoltage protection module (18), an overcurrent protection module (19), a short-circuit protection module (20), a temperature protection module (21), a module control unit (22) and a selection output module (23), wherein the main system terminal (9) is controlled by generating a program based on a single-chip microcomputer main board.

4. The method for using an automatically protected power adapter according to claim 1, It is characterized in that: The filtering unit (10) includes a first rectifying and filtering module (24), a second rectifying and filtering module (25), a capacitor module (26), an inductor module (27), a controllable switch module (28) and an automatic shutdown module (29), wherein the first rectifying and filtering module (24) and the second rectifying and filtering module (25) are used to convert the input power supply into a DC power supply and filter out high-frequency noise and interference in the input power supply.

5. The usage method of an automatically protected power adapter according to claim 4, It is characterized in that: The capacitor module (26) is respectively connected to the output ends of the first rectifying and filtering module (24) and the second rectifying and filtering module (25), and the capacitor module (26) is connected to the series branch of the inductor module (27) and the controllable switch module (28).

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