CN114844367A - Power output regulation centralized control system and method - Google Patents
Power output regulation centralized control system and method Download PDFInfo
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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
- H02M3/33576—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 having at least one active switching element at the secondary side of an isolation transformer
- H02M3/33592—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 having at least one active switching element at the secondary side of an isolation transformer having a synchronous rectifier circuit or a synchronous freewheeling circuit at the secondary side of an isolation transformer
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00028—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment involving the use of Internet protocols
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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
- H02M3/33561—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 more than one ouput with independent control
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Abstract
The application relates to the technical field of quick charging equipment, in particular to a power output regulation centralized control system and a power output regulation centralized control method, aiming at solving the problem that the power output efficiency is low due to the gradual superposition of the step-down loss of each stage in the scene of multi-stage voltage reduction in the prior art; the interface module is connected with the AC-DC conversion module, the primary side control chip is in signal connection with the secondary side control chip, and the secondary side control chip is in signal connection with the secondary side switching tube; the secondary side switch tube is controlled by the secondary side control chip, and when the output parameters of the AC-DC conversion module are matched with the interface protocol, the output parameters are directly output to the interface module.
Description
Technical Field
The application relates to the technical field of quick charging equipment, in particular to a power output regulation centralized control system and method.
Background
With the development of science and technology and the progress of technology, from computers and mobile phones related to office work to smart bracelets and smart home appliances related to life, intelligent electronic equipment has deeply influenced people's life in various fields. In the process of daily use, besides the performance and functions of the intelligent electronic device, the energy supply endurance problem of the intelligent electronic device is also an important factor influencing the user experience.
At present, in actual life, household power supplies powered by a mains supply system are high-voltage alternating-current power supplies, and electronic equipment is powered by low-voltage power supplies with high integration and fineness, so that a power adapter is required to be used for transformation and rectification. The core components of the power adapter, also called a switching power adapter, generally include an AC-DC (alternating current-direct current) conversion module, a DC-DC (direct current-direct current) conversion module, a primary side control chip, and a secondary side control chip. Specifically, as shown in fig. 1, the AC-DC conversion module is connected to the primary side control chip, the DC-DC conversion module is connected to the secondary side control chip, an input end of the AC-DC conversion module is connected to the household alternating current power supply, an output end of the AC-DC conversion module is connected to an input end of the DC-DC conversion module, and an output end of the DC-DC conversion module is connected to the interface load. When the interface is connected with a load, the secondary control chip reads output parameters required by the interface load through an interface protocol, after the AC-DC conversion module reduces the voltage of the high-voltage alternating-current power supply to a preset value, the DC-DC conversion module carries out secondary voltage reduction according to the output parameters required by the interface load and outputs the output parameters to the interface.
In the process of implementing the present application, the inventors found that the above-mentioned technology has at least the following problems:
the power supply voltage is easy to generate energy loss in the voltage reduction process, and the voltage reduction loss of each stage is gradually superposed under the scene of multi-stage voltage reduction, so that the power supply output efficiency is low.
Disclosure of Invention
In order to reduce the loss caused by multi-stage voltage reduction when the output voltage of the power supply adaptation circuit meets an interface protocol and improve the overall efficiency of the system, the application provides a power supply output regulation centralized control system and a power supply output regulation centralized control method.
The application provides a power output adjusts centralized control system adopts following technical scheme:
a power output adjustment centralized control system comprises an AC-DC conversion module, a secondary side control chip, a primary side control chip, a secondary side switching tube and an interface module;
the AC-DC conversion module comprises a rectification circuit and a transformer circuit, the rectification circuit is connected with an alternating current power supply, and the transformer circuit is connected with and controlled by a primary side control chip;
the interface module is connected with the AC-DC conversion module and is in communication connection with the secondary control chip to transmit an interface protocol;
the secondary control chip is in communication connection with the primary control chip, is in signal connection with the secondary switching tube, is used for receiving the interface protocol identification signal and identifying power supply parameters required by the interface load according to the received interface protocol identification signal, and is also used for outputting a primary driving signal to the primary control chip so as to adjust primary output parameters;
and the secondary side switching tube is controlled by a secondary side control chip, so that when the output parameters of the AC-DC conversion module are matched with the interface protocol, the output parameters are directly output to the interface module.
By adopting the technical scheme, when a load is inserted into the interface module, the interface module can identify the interface protocol of the load to obtain the charging voltage required by the load, the secondary control chip can transmit the relevant parameters to the primary control chip through the communication connection relation with the primary control chip after identifying the charging voltage, the controlled AC-DC conversion module is favorable for reducing the output voltage to the charging voltage according to the requirement of the charging voltage, and then the AC-DC conversion module can directly output the charging voltage to the interface module, the step of secondary voltage reduction is favorable for skipping, the loss generated in the process of secondary voltage reduction is avoided, and the conversion efficiency of electric energy in a system is favorable for improving.
In a specific implementation manner, the power output regulation centralized control system further comprises an optical coupler, wherein the optical coupler comprises an optical coupling generator and an optical coupling receiver which are matched in optical communication;
the optical coupler generator is controlled by the secondary side control chip and is used for sending a primary side driving signal;
and the optocoupler receiver is connected with the primary side control chip and used for receiving a primary side driving signal and transmitting the primary side driving signal to the primary side control chip.
By adopting the technical scheme, the communication connection between the secondary control chip and the primary control chip is realized through the optical coupling device, the reduction of the electrical connection between the secondary control chip and the primary control chip is facilitated, the relation between the primary side and the secondary side which are relatively isolated is established, and the improvement of the stability of the system is facilitated.
In a specific implementation manner, the power output regulation centralized control system further comprises a secondary rectification circuit, wherein the secondary rectification circuit comprises a synchronous rectifier, and the synchronous rectifier is controlled by a secondary side control chip.
By adopting the technical scheme, the secondary rectification circuit is beneficial to replacing a rectification diode to carry out rectification and filtering, and further is beneficial to reducing the loss of a rectification tube caused by rectification of the secondary input end by using the rectification tube, and further is beneficial to improving the conversion efficiency of a system and reducing the power loss.
In a specific implementation manner, the power output regulation centralized control system further includes an expansion interface module, the expansion interface module is connected with the secondary control chip in a communication manner, and the expansion interface module is connected with the AC-DC conversion module.
By adopting the technical scheme, the expansion interface module arranged in the system is beneficial to enabling the system to be simultaneously connected with interface loads of different specifications, the effect of multi-port output of the system is facilitated to be realized, the expansion interface module and the interface module can enable the primary side control chip to be adjusted according to required charging voltage through the secondary side control chip, single voltage reduction voltage output is facilitated to be met under the condition of multiple ports, and further the conversion efficiency of the system is facilitated to be improved under the application scene of multi-port output.
In a specific implementation manner, the power output regulation centralized control system further comprises a DC-DC conversion module, the DC-DC conversion module is connected with the AC-DC conversion module, and the DC-DC conversion module comprises a DC-DC conversion circuit and a conversion switching tube;
the DC-DC conversion circuit is controlled by the secondary side control chip and is used for carrying out secondary voltage reduction on the output voltage of the AC-DC conversion module;
the conversion switching tube is controlled by the secondary side control chip and is used for controlling the opening or closing of the DC-DC conversion module.
By adopting the technical scheme, the charging voltage is adjusted by the secondary voltage reduction with controllable switches when the charging voltages required by the multiple ports are different through the arranged DC-DC conversion module, so that the conversion efficiency of the system is improved.
In a specific implementation mode, the DC-DC conversion module is connected with the interface module through a secondary side switch tube;
and/or;
the DC-DC conversion module is connected with the expansion interface module through a secondary switch tube;
the secondary switch tube is controlled by a secondary control chip and is also used for controlling the connection of the interface module and the expansion interface module.
By adopting the technical scheme, the interface module and the power input end of the expansion interface module are beneficial to realizing input selection between direct connection with the AC-DC conversion module and secondary voltage reduction through the DC-DC conversion module through the secondary switch tube, and further beneficial to realizing the effect of improving the conversion efficiency of the system under the condition of meeting different application requirements.
In a specific implementation manner, the device further includes a current-limiting output circuit, where the current-limiting output circuit is connected to the interface module and the expansion interface module in a one-to-one correspondence manner, and is used to control output current parameters of the interface module and the expansion interface module.
By adopting the technical scheme, the output current of the interface module is favorably controlled through the current-limiting output end, the dual control of the system on the charging voltage and the charging current is favorably realized, and the output quality of the system is improved.
In a specific implementation manner, the interface module and the expansion interface module each include an insertion detection end, and the insertion detection end is connected with the secondary control chip and is used for monitoring the insertion condition of the interface module.
By adopting the technical scheme, the insertion detection ends arranged on the interface module and the expansion interface module are beneficial to detecting the inserted load, and further beneficial to improving the detection response efficiency of the interface load.
In a second aspect, the present application provides a power output adjustment centralized control method, which adopts the following technical scheme:
a power output adjustment centralized control method is characterized in that: the method is implemented based on the power output regulation centralized control system as described in any one of the first aspect, and comprises the following steps:
acquiring interface load information, wherein the interface load information at least comprises charging voltage and charging current required by an interface load;
generating a current limiting window based on the charging current;
generating a primary side driving signal based on the charging voltage, wherein the primary side driving signal is used for controlling an AC-DC conversion module of a primary side;
acquiring a secondary input voltage of the AC-DC conversion module, and comparing the secondary input voltage with a charging voltage;
and when the secondary side input voltage is equal to the charging voltage, generating a secondary side gate control signal so that the AC-DC conversion module is directly output to the interface module to supply power for the interface load.
By adopting the technical scheme, when a load is inserted into the interface module, the interface module can identify the interface protocol of the load to obtain the charging voltage required by the load, the secondary control chip can transmit the relevant parameters to the primary control chip through the communication connection relation with the primary control chip after identifying the charging voltage, the controlled AC-DC conversion module is favorable for reducing the output voltage to the charging voltage according to the requirement of the charging voltage, and further the AC-DC conversion module can be directly output to the interface module, the step of secondary voltage reduction is favorable for skipping, the loss generated in the process of secondary voltage reduction is avoided as much as possible, and the conversion efficiency of electric energy in a system is favorable for improving.
In a specific embodiment, the method further comprises:
when at least two different interface load information are acquired, marking the maximum value of the charging voltage in the different interface load information as a primary output voltage;
generating a primary side driving signal based on the primary output voltage;
when the secondary side input voltage of the AC-DC conversion module is equal to the primary side output voltage, generating a secondary side gate control signal so that the AC-DC conversion module directly outputs the secondary side gate control signal to an interface module corresponding to the primary side output voltage to supply power to an interface load;
respectively generating a conversion driving signal and a conversion gate control signal based on the difference value between the primary output voltage and the target charging voltage in other load information;
controlling the DC-DC conversion circuit to step down the primary output voltage to a target charging voltage based on the conversion gate control signal and the conversion driving signal;
and when the output voltage of the DC-DC conversion circuit is equal to the target charging voltage, generating a target auxiliary side gate control signal so that the DC-DC conversion module outputs the target charging voltage to an interface module corresponding to the target charging voltage to supply power to an interface load.
By adopting the technical scheme, when different charging voltages are required, the highest charging voltage is used as the output of the AC-DC conversion module, so that at least one port in the ports can be communicated directly, the conversion efficiency of the system is improved, the charging voltages of other interfaces are subjected to secondary voltage reduction respectively, the other interfaces can reach required charging voltage values through the secondary voltage reduction, and the requirement of multi-port output is met while the circuit conversion efficiency is improved.
In summary, the present application includes at least one of the following beneficial technical effects:
when a load is inserted into the interface module, the interface module can identify an interface protocol of the load to obtain charging voltage required by the load, the secondary control chip can transmit relevant parameters to the primary control chip through the communication connection relation with the primary control chip after identifying the charging voltage, the controlled AC-DC conversion module is favorable for reducing the output voltage to the charging voltage according to the requirement of the charging voltage, and further the AC-DC conversion module can directly output the charging voltage to the interface module, the step of secondary voltage reduction is favorable for skipping, so that the loss generated in the process of secondary voltage reduction is avoided, and the conversion efficiency of electric energy in a system is favorable for improving;
when different charging voltage requirements exist, the highest charging voltage is used as the output of the AC-DC conversion module, so that at least one port of the multiple ports can be directly connected, the conversion efficiency of a system is improved, the charging voltages of other interfaces are subjected to secondary voltage reduction respectively, the other interfaces can reach the required charging voltage value through the secondary voltage reduction, and the multi-port output requirements are met while the circuit conversion efficiency is improved;
drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a topology of a two-stage transformer system in the background art;
FIG. 2 is a schematic diagram of a single output interface topology of a power output regulation centralized control system shown in an embodiment of the present application;
FIG. 3 is a schematic diagram of a single-output circuit structure of a power output regulation centralized control system shown in an embodiment of the present application;
FIG. 4 is a schematic diagram of a topology of a multi-output interface of a power output regulation centralized control system shown in an embodiment of the present application;
FIG. 5 is a schematic diagram of a multi-output interface circuit structure of a centralized control system for regulating output of power supplies shown in an embodiment of the present application;
FIG. 6 is a flow chart of a method for centralized control of power output regulation in an embodiment of the present application;
fig. 7 is a flowchart of a method for centralized control of power output regulation in the embodiment of the present application.
Detailed Description
The present embodiments are only illustrative and not restrictive, and those skilled in the art can make modifications to the embodiments without inventive contribution as required after reading the present specification, but the technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to fig. 1 to 7 of the embodiments of the present application only if they are protected by patent laws in order to make the objects, technical solutions and advantages of the embodiments of the present application clearer within the scope of the claims of the present application.
The application relates to an integrated circuit applied to a power adapter in the field of quick charging, and in the prior art, a conventional two-stage conversion circuit comprises an AC-DC conversion module, a DC-DC conversion module, a primary side control chip and a secondary side control chip. Specifically, referring to fig. 1, the AC-DC conversion module is controlled by a primary control chip, the DC-DC conversion module is controlled by a secondary control chip, an input end of the AC-DC conversion module is connected to the household AC power supply, an output end of the AC-DC conversion module is connected to an input end of the DC-DC conversion module, and an output end of the DC-DC conversion module is connected to the load. When the interface is connected with the load, the secondary side control chip reads the output parameters required by the load through an interface protocol; the AC-DC conversion module is used for reducing the voltage of the high-voltage alternating-current power supply to a preset value under the control of a preset instruction of the primary side control chip, and then the DC-DC conversion module is used for carrying out secondary voltage reduction according to load output parameters required by the load and outputting the output load charging voltage to the load interface. Obviously, when a high-voltage alternating-current power supply is converted into a low-voltage direct-current power supply required by a load, two-stage or even multi-stage voltage reduction processes need to be performed respectively, and the conversion loss of the system is overlapped step by step in each stage of voltage reduction process, so that the problem of low conversion efficiency of the system is caused.
In order to overcome the problems in the prior art, embodiments of the present application disclose a power output adjustment centralized control system.
Example 1:
referring to fig. 2, a power output regulation centralized control system includes an AC-DC conversion module, a secondary control chip U1, a secondary switching tube, and an interface module.
Referring to fig. 3, the secondary control chip U1 includes a primary driving signal generating terminal VR, a protocol identification input terminal DN-C, DP-C, CC2-C, CC1-C, and the secondary control chip U1 further includes a secondary control terminal VGATE-C. The auxiliary side switch tube is an N-channel MOS tube, and the control end of the auxiliary side switch tube is connected to the grid electrode of the auxiliary side switch tube and used for controlling the conduction and the closing of the auxiliary side switch tube. And the primary side driving signal generating end VR is in communication connection with the primary side control chip U2 and is used for transmitting a primary side driving signal.
Referring to fig. 3, the AC-DC conversion module includes a rectifying circuit, a transformer circuit, a primary side control chip U2, and a primary side switching tube. The rectifying circuit can be set as a bridge type rectifying circuit and comprises four rectifying diodes which are butted in pairs D1-D4, the input end of the rectifying circuit is connected with the high-voltage alternating-current power supply CN1, and the rectifying circuit is used for converting alternating current input by the high-voltage alternating-current power supply CN1 into direct current by utilizing the one-way conductivity of the rectifying diodes. The output end of the rectifying circuit can also be provided with a conventional filter circuit, the filter circuit is composed of two capacitors C1 and C2 which are connected in parallel and an inductor L1 which is connected in series, and the filter circuit is used for filtering an alternating current component output by the filter circuit. The rectifying circuit is processed by the filter circuit and then output To the transformer circuit, the transformer circuit comprises a primary input end Ti, a primary output end To1 and a secondary output end To2, the primary input end Ti is connected with the output end of the filter circuit, and the secondary output end To2 is connected with a load interface.
Referring to fig. 3, the primary side control chip U2 includes a primary side driving signal receiving terminal FB, a voltage sampling pin Vs, and a current detection pin Cs. The voltage sampling pin Vs is connected with the primary side output end To1 through a sampling resistor R2 and a sampling resistor R4, the sampling resistors R2 and R4 are connected in series, the sampling resistor R4 is grounded, the sampling resistor R2 is connected with the primary side output end To1, and the voltage sampling pin Vs is connected with a node between the sampling resistors R2 and R4. In addition, the primary side driving signal receiving terminal FB is in communication connection with the primary side driving signal generating terminal VR of the secondary side control chip U1, in this embodiment, the communication connection may be achieved through a set of optical couplers, and each optical coupler may include an optical coupler output terminal controlled by the primary side driving signal generating terminal VR, and an optical coupler receiving terminal connected to the primary side driving signal receiving terminal FB. The output end of the optical coupler can be set to be a light emitting diode U3A, and the receiving end of the optical coupler can be set to be a phototriode U3B. Specifically, the primary side driving signal receiving end FB is connected to the collector of the phototransistor U3B, and the emitter of the phototransistor U3B is grounded, and the base is coupled to the light emitting diode U3A. The current detection pin Cs is grounded. The primary side control chip U2 further comprises a primary side switching tube, and the primary side switching tube can be integrated in the primary side control chip U2 and is used for adjusting output parameters of a primary side control signal according To a primary side driving signal, so that the secondary side output end To2 outputs voltage required by a load.
Referring to fig. 3, the interface module includes a power output interface for connecting with a load to realize charging and data transmission, and the power output interface may be configured as a load interface based on different charging protocols, such as: USB, TYPE-C, etc., in this embodiment, the TYPE-C interface is taken as an example for description, and other cases are similar and will not be described again. The interface module further comprises a power input end VBUS, the power input end VBUS is connected with the source electrode of the secondary side switching tube, and the drain electrode of the secondary side switching tube is connected with the secondary side output end To 2. And the protocol transmission interfaces DM, DP, CC2 and CC1 are respectively connected with a protocol identification input end DN-C, DP-C, CC2-C, CC1-C on the secondary side control chip U1 and are used for reading and transmitting an interface protocol.
In one embodiment, the power output regulation centralized control system may further include an AC-DC conversion module and a secondary rectification circuit, wherein the secondary rectification circuit includes a synchronous rectifier that may be built by a dedicated power rectification transistor NMOS-SR based on a low-state resistor. The secondary side control chip U1 is provided with a synchronous rectifier driving signal output end GATE and a synchronous voltage signal output end VDS, wherein the synchronous rectifier driving signal output end GATE is connected with the grid electrode of the triode NMOS-SR, and the synchronous voltage signal output end VDS is connected with the drain electrode of the triode NMOS-SR and is connected with the source electrode of the triode NMOS-SR through a resistor R1 and an inductor C1.
Thus, the secondary rectification circuit is beneficial to replacing a rectification diode to carry out rectification and filtering, and further is beneficial to reducing the loss of a rectification tube caused by rectification by using the rectification tube at the secondary input end, and further is beneficial to improving the conversion efficiency of a system and reducing the power loss.
The implementation principle of the power output regulation centralized control system in embodiment 1 of the application is as follows: when a load is accessed in the load interface, the interface module acquires an interface protocol matched with the load according to a preset handshake protocol, and transmits the interface protocol to a protocol identification input end DN-C, DP-C, CC2-C, CC1-C on a secondary side control chip U1 through protocol transmission interfaces DM, DP, CC2 and CC 1. After receiving the interface protocol, the secondary control chip U1 identifies the interface protocol, obtains output parameters required by the load, and encodes the output parameters to obtain a primary driving signal. The primary side driving signal generating terminal VR then controls the light emitting diode U3A to emit a light signal. After receiving the optical signal, the phototransistor U3B inputs the optical signal To the primary side driving signal receiving terminal FB, the primary side control chip U2 decodes the optical signal To obtain the primary side driving signal, and under the control of the primary side driving signal, the secondary side output terminal To2 outputs the voltage required by the load.
At this time, the secondary output terminal To2 is directly connected To the drain of the secondary switch tube, when the secondary control chip U1 detects that the output of the secondary output terminal To2 meets the interface protocol, the secondary switch tube is controlled To be turned on by the secondary control terminal VGATE-C, and finally the secondary output terminal To2 is directly connected To the power input terminal VBUS of the interface module for output.
Example 2:
referring to fig. 4, a power output adjustment centralized control system includes an AC-DC conversion module, a secondary control chip U1, a secondary switch tube, an interface module, and an expansion interface module. It should be noted that the expansion interface module is a relatively existing feature based on the interface module, and in essence, in a multi-port power adapter, when one port is designated as the interface module, the remaining ports are the expansion interface modules. Therefore, in this embodiment, to avoid confusion, a three-port power adapter is taken as an example for explanation, and it is not necessary to specify an interface module and an expansion interface module, the three ports respectively correspond to the load interface a, the load interface B, and the load interface C, and the interface specifications of the three ports are not limited, and may be different or the same.
Referring to fig. 4 and 5, in the case of three interface modules, the primary circuit is the same as that of embodiment 1, and there is no difference, and in the secondary circuit, the protocol identification input terminal and the secondary gate control terminal configured for each port are provided on the secondary control chip U1. In addition, the auxiliary side circuit is additionally provided with auxiliary side switch tubes which are in one-To-one correspondence with the interface modules, each auxiliary side switch tube is connected with one auxiliary side door control end in one-To-one correspondence, the auxiliary side door control ends are independent, and under the independent control of the auxiliary side door control ends, each interface module can be directly connected with an auxiliary side output end To 2.
Therefore, even in a multi-port output scene, when all the interface modules output the same load voltage, the power output regulation centralized control system can perform single-stage voltage reduction processing of 'primary voltage reduction and secondary direct connection', and high conversion efficiency of the system is kept.
However, in some application scenarios, different loads need to be connected with different output parameters, and a single-output power output regulation centralized control system is difficult to meet abundant use requirements and lacks flexibility. Accordingly, referring To fig. 4 and 5, the power output regulation centralized control system may further include a DC-DC conversion module, where the DC-DC conversion module is implemented based on a conventional DC-DC conversion circuit, and a power input end of the DC-DC conversion circuit is connected To the secondary output end To2, so as To implement a function of outputting a fixed voltage after converting an input voltage. The DC-DC conversion module also comprises a conversion driving signal input end and a conversion switching tube, and the DC-DC conversion circuit is controlled by the secondary control chip through the driving signal input end and is used for carrying out secondary voltage reduction on the output voltage of the AC-DC conversion module; the conversion switch tube is controlled by the secondary side control chip through the control end of the conversion door and is used for controlling the opening or closing of the DC-DC conversion module.
In one embodiment, the secondary control chip further includes a current-limiting output terminal, and the current-limiting output terminal is connected to the interface module and the expansion interface module in a one-to-one correspondence manner, and is used for controlling output current parameters of the interface module and the expansion interface module.
Therefore, the current-limiting output end is beneficial to controlling the output current of the interface module, the dual control of the system on the charging voltage and the charging current is facilitated, and the output quality of the system is improved.
The implementation principle of the power output regulation centralized control system in embodiment 2 of the present application is as follows: in the case of a multi-port output:
scene one: when each port is connected To a load with the same power supply parameters, as in embodiment 1, each interface module is directly connected To the secondary output terminal To2, so that a single-stage voltage reduction process of "primary voltage reduction and secondary voltage direct connection" is realized, which is beneficial To maintaining high conversion efficiency of the system.
Scene two: when loads with different required power supply parameters exist in the three ports, for example, the load interface a, the load interface B, and the load interface C are different, the secondary control chip U1 obtains the charging voltage required by each interface module, that is, the charging voltage a, the charging voltage B, and the charging voltage C, respectively. At this time, the secondary control chip U1 may select the highest charging voltage a as the primary output voltage, and repeat the steps in embodiment 1 with the primary output voltage as a reference, so that the secondary output terminal To2 outputs the charging voltage a and directly connects the charging voltage a To the load interface a. Finally, the secondary control chip U1 may drive the DC-DC conversion modules corresponding To the load interface B and the load interface C, respectively, so that the charging voltage a output by the secondary output terminal To2 is respectively reduced To the charging voltage B and the charging voltage C, and is respectively input To the load interface B and the load interface C under the routing control of the transfer switch tube and the secondary switch tube. Finally, the effects of primary voltage reduction, secondary-side-to-one-interface direct connection and two-interface secondary voltage reduction of three load interfaces with different specifications are achieved. Under the condition of ensuring flexible application of multiple ports, at least one straight-through power supply line is reserved, and the conversion efficiency of the system is improved.
The embodiment of the application also discloses a power output regulation centralized control method.
A power output adjustment centralized control method, implemented based on a power output adjustment centralized control system as described in the above embodiment, with reference to fig. 6, includes the following steps:
601, acquiring interface load information, wherein the interface load information at least comprises charging voltage and charging current required by an interface load;
In one embodiment, referring to fig. 7, a power output regulation centralized control method further includes the following processing steps:
It is obvious to those skilled in the art that, for convenience and simplicity of description, only the division of the functional modules is illustrated, and in practical applications, the above functions may be distributed by different functional modules according to needs, that is, the internal structure of the apparatus is divided into different functional modules to complete all or part of the above described functions.
The above embodiments are only used to describe the technical solutions of the present application in detail, but the above embodiments are only used to help understanding the method and the core idea of the present application, and should not be construed as limiting the present application. Those skilled in the art should also appreciate that various modifications and substitutions can be made without departing from the scope of the present disclosure.
Claims (10)
1. A kind of power output regulates the centralized control system, characterized by that: the device comprises an AC-DC conversion module, a secondary side control chip, a primary side control chip, a secondary side switching tube and an interface module;
the AC-DC conversion module comprises a rectifying circuit and a transformer circuit, the rectifying circuit is connected with an alternating current power supply, and the transformer circuit is connected with and controlled by a primary side control chip;
the interface module is connected with the AC-DC conversion module and is in communication connection with the secondary control chip to transmit an interface protocol;
the secondary control chip is in communication connection with the primary control chip, is in signal connection with the secondary switching tube, is used for receiving the interface protocol identification signal and identifying power supply parameters required by the interface load according to the received interface protocol identification signal, and is also used for outputting a primary driving signal to the primary control chip so as to adjust primary output parameters;
and the secondary side switching tube is controlled by a secondary side control chip, so that when the output parameters of the AC-DC conversion module are matched with the interface protocol, the output parameters are directly output to the interface module.
2. The system of claim 1, wherein: the power output regulation centralized control system also comprises an optical coupler, wherein the optical coupler comprises an optical coupling generator and an optical coupling receiver which are matched with each other in optical communication;
the optical coupler generator is controlled by the secondary side control chip and is used for sending a primary side driving signal;
and the optocoupler receiver is connected with the primary side control chip and used for receiving a primary side driving signal and transmitting the primary side driving signal to the primary side control chip.
3. The system of claim 1, wherein: the power output regulation centralized control system also comprises a secondary rectification circuit, wherein the secondary rectification circuit comprises a synchronous rectifier, and the synchronous rectifier is controlled by a secondary side control chip.
4. The system of claim 1, wherein: the power output adjustment centralized control system further comprises an expansion interface module, the expansion interface module is in communication connection with the secondary control chip, and the expansion interface module is connected with the AC-DC conversion module.
5. The system of claim 4, wherein: the power output regulation centralized control system also comprises a DC-DC conversion module, the DC-DC conversion module is connected with the AC-DC conversion module, and the DC-DC conversion module comprises a DC-DC conversion circuit and a conversion switching tube;
the DC-DC conversion circuit is controlled by the secondary side control chip and is used for carrying out secondary voltage reduction on the output voltage of the AC-DC conversion module;
the conversion switching tube is controlled by the secondary side control chip and is used for controlling the opening or closing of the DC-DC conversion module.
6. The system of claim 5, wherein: the DC-DC conversion module is connected with the interface module through a secondary switch tube;
and/or;
the DC-DC conversion module is connected with the expansion interface module through a secondary switch tube;
the secondary switch tube is controlled by a secondary control chip and is also used for controlling the connection of the interface module and the expansion interface module.
7. The system of claim 4, wherein: the current-limiting output circuit is connected with the interface module and the expansion interface module in a one-to-one correspondence mode and used for controlling output current parameters of the interface module and the expansion interface module.
8. The system of claim 4, wherein: the interface module and the expansion interface module comprise insertion detection ends, and the insertion detection ends are connected with the secondary control chip and used for monitoring the insertion condition of the interface module.
9. A power output adjustment centralized control method is characterized in that: the method is realized based on a power output regulation centralized control system as claimed in any one of claims 1-8, and comprises the following steps:
acquiring interface load information, wherein the interface load information at least comprises charging voltage and charging current required by an interface load;
generating a current limiting window based on the charging current;
generating a primary side driving signal based on the charging voltage, wherein the primary side driving signal is used for controlling an AC-DC conversion module of a primary side;
acquiring a secondary input voltage of the AC-DC conversion module, and comparing the secondary input voltage with a charging voltage;
and when the secondary side input voltage is equal to the charging voltage, generating a secondary side gate control signal so that the AC-DC conversion module is directly output to the interface module to supply power for the interface load.
10. The power output regulation centralized control method of claim 9, wherein: the method further comprises the following steps:
when at least two different interface load information are acquired, marking the maximum value of the charging voltage in the different interface load information as a primary output voltage;
generating a primary side driving signal based on the primary output voltage;
when the secondary side input voltage of the AC-DC conversion module is equal to the primary side output voltage, generating a secondary side gate control signal so that the AC-DC conversion module directly outputs the secondary side gate control signal to an interface module corresponding to the primary side output voltage to supply power to an interface load;
respectively generating a conversion driving signal and a conversion gate control signal based on the difference value between the primary output voltage and the target charging voltage in other load information;
controlling the DC-DC conversion circuit to step down the primary output voltage to a target charging voltage based on the conversion gate control signal and the conversion driving signal;
and when the output voltage of the DC-DC conversion circuit is equal to the target charging voltage, generating a target auxiliary side gate control signal so that the DC-DC conversion module outputs the target charging voltage to an interface module corresponding to the target charging voltage to supply power to an interface load.
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| CN202210600847.8A CN114844367B (en) | 2022-05-30 | Centralized control system and method for power output adjustment |
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| CN202210600847.8A CN114844367B (en) | 2022-05-30 | Centralized control system and method for power output adjustment |
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