Power line carrier power supply circuit and power supply method based on power line carrier power supply circuit

Abstract

The invention relates to the technical field of power supply circuits, and provides a power line carrier power supply circuit and a power supply method based on the power line carrier power supply circuit, the power line carrier power supply circuit comprises a power-on delay module, a current limiting module, an energy storage module and an electronic switch; one end of the power-on delay module and one end of the current limiting module are respectively connected with a circuit input end, the other end of the power-on delay module is connected with a first end of the electronic switch, and the other end of the current limiting module is respectively connected with the energy storage module and a second end of the electronic switch; and the third end of the electronic switch is connected with the circuit output end. In the technical scheme provided by the invention, when the carrier module needs to operate with high power consumption, the electric energy stored by the energy storage module can be used for supplying energy, so that the current requirement required to be provided by the electric energy meter or the terminal is reduced, and the carrier module with higher power consumption can be replaced in the electric energy meter operating at an early stage.

Description

Technical Field

[0001] The present invention relates to the technical field of power supply circuits, and in particular to a power supply circuit and a power supply method based on the power supply circuit. Background Art

[0002] The power carrier module is the most commonly used communication module on smart electricity meters and collection terminals. On the electricity meters and collection terminals, different carrier modules can be configured according to the needs of the power company.

[0003] Due to technical problems, the modules used in early electric energy meters were narrowband carrier modules. The disadvantage of this carrier module is slow communication speed, but the advantage is low power consumption. With the development of technology, the carrier module has been upgraded to HPLC carrier module. The advantage of this carrier module is fast communication speed, but the power consumption is relatively large. Since the electric energy meter was mainly designed based on the narrowband carrier module in the early stage, the output power of the power supply was small, resulting in the electric energy meter that had been installed on site in the early stage unable to meet the power supply power requirements of the HPLC carrier module and could not be upgraded to the HPLC carrier module. Summary of the invention

[0004] The present invention provides a power carrier power supply circuit and a power supply method based on the power carrier power supply circuit, which are used to solve the defects in the prior art and realize the replacement of a carrier module with higher power consumption in an early-operating electric energy meter.

[0005] The present invention provides a power carrier power supply circuit, comprising a power-on delay module, a current limiting module, an energy storage module and an electronic switch; One end of the power-on delay module and one end of the current limiting module are respectively connected to the circuit input end, the other end of the power-on delay module is connected to the first end of the electronic switch, the other end of the current limiting module is respectively connected to the energy storage module and the second end of the electronic switch, and the third end of the electronic switch is connected to the circuit output end.

[0006] According to a power carrier power supply circuit provided by the present invention, the power-on delay module includes a first diode, a first resistor, a first capacitor, a second resistor, a voltage regulator and a first transistor; The positive electrode of the first diode is connected to the circuit input end, the negative electrode of the first diode is connected to one end of the first resistor, the other end of the first resistor is respectively connected to one end of the first capacitor, one end of the second resistor, and one end of the voltage regulator, the other end of the voltage regulator is connected to the base of the first transistor, the collector of the first transistor is connected to the first end of the electronic switch, and the other end of the first capacitor, the other end of the second resistor, and the emitter of the first transistor are grounded.

[0007] According to a power carrier power supply circuit provided by the present invention, the electronic switch includes a third resistor, a fourth resistor and a second triode; One end of the third resistor is connected to the other end of the power-on delay module, the other end of the third resistor is respectively connected to one end of the fourth resistor and the base of the second transistor, the other end of the fourth resistor is respectively connected to the energy storage module and the collector of the second transistor, and the emitter of the second transistor is connected to the output end of the circuit.

[0008] According to a power carrier power supply circuit provided by the present invention, the energy storage module includes an energy storage unit and a charging and discharging circuit; One end of the charge and discharge circuit is connected to the other end of the current limiting module and the second end of the electronic switch respectively, and the other end of the charge and discharge circuit is connected to the energy storage unit.

[0009] According to a power carrier power supply circuit provided by the present invention, the charging and discharging circuit includes a boost unit, a buck unit and a second diode; One end of the step-down unit is connected to the anode of the second diode, the other end of the step-down unit is connected to the energy storage unit and one end of the boost unit, and the other end of the boost unit is connected to the cathode of the second diode and the second end of the electronic switch.

[0010] According to a power carrier power supply circuit provided by the present invention, the voltage reduction unit includes a DC voltage reduction module, a fifth resistor and a third diode; The input end of the DC step-down module is connected to the other end of the current limiting module, the output end of the DC step-down module is connected to the anode of the third diode, and the cathode of the third diode is connected to one end of the energy storage unit and the boost unit.

[0011] According to a power carrier power supply circuit provided by the present invention, the boost unit includes a fourth diode, a DC boost module, and a fifth diode; The positive electrode of the fourth diode is connected to the other end of the energy storage unit and the step-down unit respectively, the negative electrode of the fourth diode is connected to one end of the DC boost module, the other end of the DC boost module is connected to the positive electrode of the fifth diode, and the negative electrode of the fifth diode is connected to the negative electrode of the second diode and the second end of the electronic switch.

[0012] According to a power carrier power supply circuit provided by the present invention, the energy storage unit includes a second capacitor; The positive electrode of the second capacitor is connected to the other end of the charge and discharge circuit, and the negative electrode of the second capacitor is grounded.

[0013] According to a power carrier power supply circuit provided by the present invention, the current limiting module includes a current limiting chip.

[0014] The present invention further provides a power supply method based on a power carrier power supply circuit, which is applied to any of the power carrier power supply circuits described above, and the method comprises: If it is detected that the carrier module is powered on, receiving an input voltage based on the circuit input terminal, and delaying turning on the electronic switch based on the power-on delay module, so as to realize power supply for the carrier module; and If it is detected that the input voltage is insufficient to power the carrier module, the carrier module is powered based on the energy storage module.

[0015] The power carrier power supply circuit and the power supply method based on the power carrier power supply circuit provided by the present invention, when the carrier module is powered on, the power-on delay module controls the electronic switch to delay turning on or off first, so as to realize power supply to the carrier module, and at the same time, to allow the electric energy meter or terminal to fully charge the energy storage module. The current limiting module is used to limit the current that the carrier module draws from the electric energy meter, so as to avoid excessive power consumption of the carrier module, which causes the electric energy meter or terminal to fail to work. The energy storage module stores electric energy, and when the carrier module is started and communicated, if the voltage input by the electric energy meter is insufficient, it provides electric energy to the carrier module. When the carrier module needs to run at high power consumption, it can be powered by the electric energy stored in the energy storage module, reducing the current requirements for the electric energy meter or terminal. Through the current limiting module, the power current drawn from the electric energy meter or terminal by the carrier module is controlled to avoid the electric energy meter or terminal from being abnormal due to insufficient load capacity. Through the power-on delay module, the energy storage module is fully charged, so as to avoid the carrier module being unable to start due to excessive starting current of the carrier module when it is powered on. It is possible to replace the carrier module with a larger power consumption in the early running electric energy meter. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 This is one of the structural schematic diagrams of the power carrier power supply circuit provided by the present invention.

[0018] Figure 2 This is the second structural schematic diagram of the power carrier power supply circuit provided by the present invention.

[0019] Figure 3 It is a flow chart of a power supply method based on a power carrier power supply circuit provided by the present invention.

[0020] Figure 4 It is a structural schematic diagram of the electronic device provided by the present invention.

[0021] Reference numerals: The first diode: D1; the second diode: D2; the third diode: D3; the fourth diode: D4; the fifth diode: D5; the first resistor: R1; the second resistor: R2; the third resistor: R3; the fourth resistor: R4; the fifth resistor: R5; the first capacitor: C1; the second capacitor: C2; the first transistor: Q1; the second transistor: Q2; the voltage regulator: Z. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Combine the following Figure 1-Figure 2 The power carrier power supply circuit of the present invention is described.

[0024] Figure 1 FIG. 1 is a schematic diagram of a power carrier power supply circuit according to an exemplary embodiment. Figure 1 As shown, in an exemplary embodiment, the power carrier power supply circuit includes a power-on delay module, a current limiting module, an energy storage module and an electronic switch; One end of the power-on delay module and one end of the current limiting module are respectively connected to the circuit input end, the other end of the power-on delay module is connected to the first end of the electronic switch, the other end of the current limiting module is respectively connected to the energy storage module and the second end of the electronic switch, and the third end of the electronic switch is connected to the circuit output end.

[0025] In the embodiment of the present invention, the circuit input end is connected to the electric energy meter or terminal, and the current input end is connected to the carrier module. When the carrier module is powered on, the power-on delay module controls the electronic switch to delay the shutdown of the power supply to the carrier module, so that the electric energy meter can fully charge the energy storage module. The current that the carrier module draws from the electric energy meter is limited by the current limiting module to avoid excessive power consumption of the carrier module, which causes the electric energy meter to fail to work. The energy storage module stores electric energy, and when the carrier module is started and communicated, if the voltage input by the electric energy meter is insufficient, it provides electric energy to the carrier module.

[0026] Through the technical solution provided by the embodiment of the present invention, when the carrier module needs to operate with high power consumption, it can be powered by the electric energy stored in the energy storage module, thereby reducing the current requirement for the electric energy meter or the terminal. The current limiting module is used to control the power supply current of the carrier module from the electric energy meter or the terminal, thereby preventing the electric energy meter or the terminal from causing anomalies due to insufficient load capacity. The power-on delay module is used to fully charge the energy storage module, thereby preventing the carrier module from being unable to start due to excessive starting current of the carrier module when it is powered on.

[0027] In an exemplary embodiment of the present invention, the power-on delay module includes a first diode D1, a first resistor R1, a first capacitor C1, a second resistor R2, a voltage regulator Z and a first transistor Q1; The anode of the first diode D1 is connected to the circuit input end, the cathode of the first diode D1 is connected to one end of the first resistor R1, the other end of the first resistor R1 is respectively connected to one end of the first capacitor C1, one end of the second resistor R2, and one end of the voltage regulator Z, the other end of the voltage regulator Z is connected to the base of the first transistor Q1, the collector of the first transistor Q1 is connected to the first end of the electronic switch, and the other end of the first capacitor C1, the other end of the second resistor R2, and the emitter of the first transistor Q1 are grounded.

[0028] In the embodiment of the present invention, Figure 2 As shown, the power-on delay module is composed of a first diode D1, a first resistor R1, a first capacitor C1, a second resistor R2, a voltage regulator Z and a first transistor Q1. The delay time is mainly composed of the first resistor R1 and the first capacitor C1. When the power is turned on, the power flows in from the circuit input end, and after being stabilized by the first diode D1, the first capacitor C1 is charged through the first resistor R1. The voltage across the first capacitor C1 rises slowly. When the voltage rises to a certain voltage, the voltage regulator Z and the first transistor Q1 are turned on, the collector and emitter of the first transistor Q1 are saturated and turned on, the collector level of the first transistor Q1 becomes 0V, and the electronic switch changes from cut-off to on, thereby supplying power to the carrier module. The delay time is preliminarily calculated as the resistance value of the first resistor R1 multiplied by the capacitance value of the first capacitor C1.

[0029] In an exemplary embodiment of the present invention, the electronic switch includes a third resistor R3, a fourth resistor R4 and a second transistor Q2; One end of the third resistor R3 is connected to the other end of the power-on delay module, the other end of the third resistor R3 is respectively connected to one end of the fourth resistor R4 and the base of the second transistor Q2, the other end of the fourth resistor R4 is respectively connected to the energy storage module and the collector of the second transistor Q2, and the emitter of the second transistor Q2 is connected to the circuit output end.

[0030] In the embodiment of the present invention, the current provided by the electric energy meter or the terminal is input into the electronic switch through the power-on delay module, so that the second transistor Q2 is turned on, thereby realizing power supply for the carrier module.

[0031] In an exemplary embodiment of the present invention, the energy storage module includes an energy storage unit and a charging and discharging circuit; One end of the charge and discharge circuit is connected to the other end of the current limiting module and the second end of the electronic switch respectively, and the other end of the charge and discharge circuit is connected to the energy storage unit.

[0032] In the embodiment of the present invention, the energy storage module is used to store electric energy, and the charge and discharge circuit realizes charging or discharging of the energy storage module. The charge and discharge circuit can be composed of many kinds, such as a dedicated battery management chip.

[0033] In an exemplary embodiment of the present invention, the charging and discharging circuit includes a boost unit, a buck unit and a second diode D2; One end of the step-down unit is connected to the anode of the second diode D2, the other end of the step-down unit is connected to the energy storage unit and one end of the boost unit, and the other end of the boost unit is connected to the cathode of the second diode D2 and the second end of the electronic switch.

[0034] In the embodiment of the present invention, Figure 2 As shown, the charge and discharge circuit includes a boost unit, a buck unit and a second diode D2. When charging the energy storage unit, the buck unit reduces the voltage to a voltage that the energy storage unit can withstand, such as 5V. When discharging is required, the boost unit boosts the voltage to a certain level. The boosted voltage must be lower than the voltage required by the carrier module. For example, if the voltage required by the carrier module is 15V, the boost unit can boost the voltage of the energy storage unit to 11.5V. This ensures that the energy storage unit does not discharge under normal conditions, and the energy storage unit will only discharge when the input voltage is insufficient.

[0035] In an exemplary embodiment of the present invention, the voltage reduction unit includes a DC voltage reduction module, a fifth resistor R5 and a third diode D3; The input end of the DC step-down module is connected to the other end of the current limiting module, the output end of the DC step-down module is connected to the anode of the third diode D3, and the cathode of the third diode D3 is connected to one end of the energy storage unit and the boost unit.

[0036] In the embodiment of the present invention, the step-down unit includes a DC step-down module, a fifth resistor R5 and a third diode D3, and the DC step-down module is a DC / DC chip. The step-down unit steps down the input voltage to the voltage required by the energy storage unit, such as 5V, and then limits the current through the fifth resistor R5, and the third diode D3 stabilizes the voltage, thereby charging the energy storage unit.

[0037] In an exemplary embodiment of the present invention, the boost unit includes a fourth diode D4, a DC boost module, and a fifth diode D5; The anode of the fourth diode D4 is connected to the other end of the energy storage unit and the buck unit respectively, the cathode of the fourth diode D4 is connected to one end of the DC boost module, the other end of the DC boost module is connected to the anode of the fifth diode D5, and the cathode of the fifth diode D5 is connected to the cathode of the second diode D2 and the second end of the electronic switch.

[0038] In the embodiment of the present invention, when the energy storage module needs to discharge, the power of the energy storage module is stabilized by the fourth diode D4, and then the voltage is boosted to a voltage lower than the voltage required by the carrier module through the DC boost module.

[0039] In an exemplary embodiment of the present invention, the energy storage unit includes a second capacitor C2; The positive electrode of the second capacitor C2 is connected to the other end of the charge and discharge circuit, and the negative electrode of the second capacitor C2 is grounded.

[0040] In the embodiment of the present invention, the energy storage unit is composed of a second capacitor C2. The second capacitor C2 may be a super capacitor, such as a capacitor meeting 1.5F and 5.5V. The energy storage unit may also be a lithium battery or the like.

[0041] In an exemplary embodiment of the present invention, the current limiting module includes a current limiting chip.

[0042] In the embodiment of the present invention, the current limiting module can adopt a dedicated current limiting chip on the market, such as SGM2523 of Shengbangwei, or MP5035GJ of MPS.

[0043] Figure 3 FIG. 1 is a flow chart showing a power supply method based on a power carrier power supply circuit according to an exemplary embodiment. Figure 3 As shown, the power supply method based on the power carrier power supply circuit is applied to any of the power carrier power supply circuits described above, including steps 310 to 320, which are described in detail as follows.

[0044] Step 310: If it is detected that the carrier module is powered on, an input voltage is received based on the circuit input terminal, and an electronic switch is turned on with delay based on a power-on delay module to realize power supply for the carrier module.

[0045] In an embodiment of the present invention, the circuit input end is connected to an electric energy meter or a terminal, and the current input end is connected to a carrier module. When the carrier module is powered on, the power-on delay module controls the electronic switch to delay turning on and off first, so that the energy storage module is fully charged, so as to power the carrier module.

[0046] Step 320: If it is detected that the input voltage is insufficient to power the carrier module, power the carrier module based on the energy storage module.

[0047] In an embodiment of the present invention, when the carrier module needs to operate at high power consumption and the input voltage is insufficient to power the carrier module, the electric energy stored in the energy storage module can be used to power the carrier module, thereby reducing the current requirement required by the electric energy meter or terminal.

[0048] Figure 4 An example of a physical structure diagram of an electronic device is shown in FIG. Figure 4 As shown, the electronic device may include: a processor 410, a communication interface 420, a memory 430 and a communication bus 440, wherein the processor 410, the communication interface 420 and the memory 430 communicate with each other through the communication bus 440. The processor 410 may call the logic instructions in the memory 430 to execute the power supply method based on the power carrier power supply circuit.

[0049] In addition, the logic instructions in the above-mentioned memory 430 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0050] On the other hand, the present invention also provides a computer program product, which includes a computer program. The computer program can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the power supply method based on the power carrier power supply circuit provided by the above methods.

[0051] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which is implemented when the computer program is executed by a processor to execute the power supply method based on the power carrier power supply circuit provided by the above methods.

[0052] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0053] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A power carrier power supply circuit, characterized in that: It includes a power-on delay module, a current limiting module, an energy storage module and an electronic switch; One end of the power-on delay module and one end of the current limiting module are respectively connected to the circuit input end, the other end of the power-on delay module is connected to the first end of the electronic switch, the other end of the current limiting module is respectively connected to the energy storage module and the second end of the electronic switch, and the third end of the electronic switch is connected to the circuit output end.

2. The power carrier power supply circuit according to claim 1, characterized in that: The power-on delay module includes a first diode, a first resistor, a first capacitor, a second resistor, a voltage regulator and a first transistor; The positive electrode of the first diode is connected to the circuit input end, the negative electrode of the first diode is connected to one end of the first resistor, the other end of the first resistor is respectively connected to one end of the first capacitor, one end of the second resistor, and one end of the voltage regulator, the other end of the voltage regulator is connected to the base of the first transistor, the collector of the first transistor is connected to the first end of the electronic switch, and the other end of the first capacitor, the other end of the second resistor, and the emitter of the first transistor are grounded.

3. The power carrier power supply circuit according to claim 1, characterized in that: The electronic switch comprises a third resistor, a fourth resistor and a second triode; One end of the third resistor is connected to the other end of the power-on delay module, the other end of the third resistor is respectively connected to one end of the fourth resistor and the base of the second transistor, the other end of the fourth resistor is respectively connected to the energy storage module and the collector of the second transistor, and the emitter of the second transistor is connected to the output end of the circuit.

4. The power carrier power supply circuit according to claim 1, characterized in that: The energy storage module includes an energy storage unit and a charging and discharging circuit; One end of the charge and discharge circuit is connected to the other end of the current limiting module and the second end of the electronic switch respectively, and the other end of the charge and discharge circuit is connected to the energy storage unit.

5. The power carrier power supply circuit according to claim 4, characterized in that: The charging and discharging circuit includes a boost unit, a buck unit and a second diode; One end of the step-down unit is connected to the anode of the second diode, the other end of the step-down unit is connected to the energy storage unit and one end of the boost unit, and the other end of the boost unit is connected to the cathode of the second diode and the second end of the electronic switch.

6. The power carrier power supply circuit according to claim 5, characterized in that: The step-down unit includes a DC step-down module, a fifth resistor and a third diode; The input end of the DC step-down module is connected to the other end of the current limiting module, the output end of the DC step-down module is connected to the anode of the third diode, and the cathode of the third diode is connected to one end of the energy storage unit and the boost unit.

7. The power carrier power supply circuit according to claim 5, characterized in that: The boost unit includes a fourth diode, a DC boost module, and a fifth diode; The positive electrode of the fourth diode is connected to the other end of the energy storage unit and the step-down unit respectively, the negative electrode of the fourth diode is connected to one end of the DC boost module, the other end of the DC boost module is connected to the positive electrode of the fifth diode, and the negative electrode of the fifth diode is connected to the negative electrode of the second diode and the second end of the electronic switch.

8. The power carrier power supply circuit according to claim 4, characterized in that: The energy storage unit includes a second capacitor; The positive electrode of the second capacitor is connected to the other end of the charge and discharge circuit, and the negative electrode of the second capacitor is grounded.

9. The power carrier power supply circuit according to any one of claims 1 to 8, characterized in that: The current limiting module includes a current limiting chip.

10. A power supply method based on a power carrier power supply circuit, characterized in that: Applied to the power carrier power supply circuit of any one of claims 1 to 9, the method comprises: If it is detected that the carrier module is powered on, receiving an input voltage based on the circuit input terminal, and delaying turning on the electronic switch based on the power-on delay module, so as to realize power supply for the carrier module; and If it is detected that the input voltage is insufficient to power the carrier module, the carrier module is powered based on the energy storage module.

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