Method for providing power supply for miniature DTU through inverter mainboard

Abstract

The invention relates to the technical field of DTU power supply, discloses a method for providing a power supply for a miniature DTU through an inverter mainboard, and comprises a system for providing the power supply for the miniature DTU through the inverter mainboard, the system comprises an inverter, the inverter is connected with a male head interface line, the male head interface line is connected with a boost voltage stabilization module, and the boost voltage stabilization module is connected with a power supply module. The voltage boosting and stabilizing module is connected with a DTU module connected with the inverter; the male connector interface line comprises a wire harness and a male connector, and the male connector is connected with a female connector arranged on the inverter mainboard. According to the invention, a male joint interface line is combined with the boost voltage stabilization module to directly supply power to the DTU module by using the inverter, and the defect that the power supply connection operation is troublesome in the process that a traditional DTU module needs an external power supply to supply power is overcome; by adopting an installation and storage mode of storing the DTU module in the inverter, the problem that a traditional DTU module is inconvenient to install and operate especially in the outdoor use process is solved, and installation and connection of the DTU module are facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of DTU power supply, and in particular to a method for providing power to a micro DTU through an inverter mainboard. Background Art

[0002] As distributed photovoltaics are continuously connected to the distribution network, how to achieve safe, intelligent, efficient and open consumption has become an urgent challenge facing the development of the distribution network. In order to ensure the safety and stability of the distribution network, better consume distributed photovoltaics, and actively explore the application of digital technology in the operation and control of low-voltage distributed photovoltaics, remote control and data collection of inverters have become a basic task that must be done;

[0003] All major manufacturers use a small or micro data acquisition terminal to complete data interaction with the inverter. Although the data acquisition terminals of each manufacturer are different in appearance, performance, interface, etc., they can all be classified as DTU. DTU (Data Transfer Unit) is a wireless terminal device specially used to convert serial port data into IP data or convert IP data into serial port data for transmission through a wireless communication network.

[0004] Distributed photovoltaic inverters are installed outdoors, some are mounted on the exterior walls of houses, and some are installed on the ground in the fields. The DTU needs to be installed near the inverter and connected to the serial port of the inverter through a serial cable.

[0005] When major manufacturers install DTU, there are two problems that need to be solved: 1) Find an installation location to fix the DTU, and at the same time, protect the DTU from water and dust; 2) Find a working power supply for the DTU. The DTU itself requires a DC power supply that is generally below DV12. To get the working power supply for the DTU mounted on the exterior wall of the house, it is necessary to drill a hole in the exterior wall and lead an AC power cord from the room to power the DTU; the DTU in the field needs to pull a very long AC power cord to get power. The AC power obtained must be converted to DC power through a power adapter before it can finally be used by the DTU;

[0006] Therefore, a method for providing power to the micro DTU through an inverter mainboard is proposed. Summary of the invention

[0007] In order to solve the technical problems existing in the prior art, the present invention provides a method for providing power to a micro DTU through an inverter mainboard.

[0008] The present invention is implemented by the following technical scheme: a system for providing power to a micro DTU through an inverter mainboard, comprising an inverter, the inverter is connected to a male interface line, the male interface line is connected to a boost voltage regulator module, the boost voltage regulator module is connected to a DTU module connected to the inverter; the male interface line comprises a wiring harness and a male connector, the male connector is connected to a female connector provided on the inverter mainboard;

[0009] The lead wire B1 of the wiring harness is connected to the terminal IN+ of the boost voltage regulator module, and the lead wire B2 of the wiring harness is connected to the terminal IN- of the boost voltage regulator module;

[0010] The terminal OUT+ of the boost and voltage stabilizing module is connected to the terminal C1 of the DTU module, and the terminal OUT- of the boost and voltage stabilizing module is connected to the terminal C2 of the DTU module;

[0011] The terminal C3 of the DTU module is connected to the terminal 485 -A of the inverter, and the terminal C4 of the DTU module is connected to the terminal 485 -B of the inverter.

[0012] As a further improvement of the above scheme, the lead terminal A1 of the male connector is connected to the lead B1 of the wiring harness, the lead terminal A2 of the male connector is connected to the lead B2 of the wiring harness, the lead terminal A3 of the male connector is connected to the lead B3 of the wiring harness, and the lead terminal A4 of the male connector is connected to the lead B4 of the wiring harness.

[0013] As a further improvement of the above scheme, the female connector includes terminal D1, terminal D2, terminal D3 and terminal D4, terminal D1 is connected to terminal VCC+ on the inverter mainboard, terminal D2 is connected to terminal VCC- on the inverter mainboard; terminal D1 is connected to lead terminal A1, terminal D2 is connected to lead terminal A2, terminal D3 is connected to lead terminal A2, and terminal D4 is connected to lead terminal A2.

[0014] As a further improvement of the above solution, the boost voltage stabilizing module includes a capacitor C arranged between the terminal IN+ and the terminal IN- IN1 and a capacitor C provided between the terminal OUT+ and the terminal OUT- OUT2 ; Inductor L3 and capacitor C are set between terminal IN+ and terminal OUT+ IN2 , Zener diode D1, regulator chip U1 and capacitor C OUT1 .

[0015] As a further improvement of the above solution, the pin 1 of the voltage regulator chip U1 is connected to a resistor R C , pin 1 of the voltage regulator chip U1, pin 2 of the voltage regulator chip U1 and capacitor C OUT1 , capacitor C OUT2, Zener diode D1 is connected to terminal OUT+, pin 4 of the regulator chip U1 is connected to inductor L3 and Zener diode D1, pin 5 of the regulator chip U1 is connected to terminal IN+, capacitor C IN1 , capacitor C IN2 Connected to inductor L3.

[0016] A method for using a system for providing power to a micro DTU through an inverter mainboard, comprising the following steps:

[0017] S1. Prepare male interface cable, boost voltage regulator module and DTU module;

[0018] S2, connect the lead wire B1 of the wiring harness of the male interface cable to the terminal IN+ on the boost voltage regulator module, and connect the lead wire B2 of the wiring harness of the male interface cable to the terminal IN- on the boost voltage regulator module;

[0019] S3, connecting the male connector of the male connector cable to the female connector on the inverter mainboard;

[0020] S4, connecting the terminal OUT+ of the boost voltage regulator module to the terminal C1 of the DTU module, and connecting the terminal OUT- of the boost voltage regulator module to the terminal C2 of the DTU module;

[0021] S5. Connect terminal C3 of the DTU module to terminal 485-A of the inverter, and connect terminal C4 of the DTU module to terminal 485-B of the inverter;

[0022] S6. Adjust the voltage knob of the boost regulator module, and use a multimeter to monitor the voltage between the terminals OUT+ and OUT-, and stabilize it at DC12V.

[0023] S7. Place the DTU module and the boost regulator module inside the inverter, and lead out the antenna of the DTU module from the waterproof and dustproof port at the bottom of the inverter;

[0024] S8. Test whether the working power supply of the DTU module is normal and whether the communication with the inverter is normal; if not, check the wiring to make sure the connection is intact.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The present invention adopts a male interface line combined with a boost voltage regulator module to realize the use of an inverter to directly power the DTU module, thereby changing the disadvantage that the traditional DTU module requires an external power supply and the power connection operation is troublesome.

[0027] 2. The present invention adopts an installation and storage method of storing the DTU module inside the inverter, which solves the problem of inconvenient installation and operation of traditional DTU modules, especially when used outdoors, and facilitates the installation and connection of the DTU module. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A schematic diagram of the structure of a system for providing power to a micro DTU through an inverter mainboard provided by the present invention;

[0029] Figure 2 A schematic diagram of the structure of the male interface cable provided by the present invention;

[0030] Figure 3 A schematic diagram of the structure of the DTU module interface provided by the present invention;

[0031] Figure 4 This is a structural schematic diagram of the boost and voltage stabilization module provided by the present invention. DETAILED DESCRIPTION

[0032] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0033] Embodiment 1:

[0034] Please combine Figure 1-Figure 4 , a system for providing power to a micro DTU through an inverter mainboard of this embodiment includes an inverter, the inverter is connected to a male interface line, the male interface line is connected to a boost voltage regulator module, the boost voltage regulator module is connected to a DTU module connected to the inverter; the male interface line includes a wiring harness and a male connector, the male connector is connected to a female connector provided on the inverter mainboard;

[0035] Lead B1 of the wiring harness is connected to terminal IN+ of the boost voltage regulator module, and lead B2 of the wiring harness is connected to terminal IN- of the boost voltage regulator module;

[0036] The terminal OUT+ of the boost voltage regulator module is connected to the terminal C1 of the DTU module, and the terminal OUT- of the boost voltage regulator module is connected to the terminal C2 of the DTU module;

[0037] Terminal C3 of the DTU module is connected to terminal 485 -A of the inverter, and terminal C4 of the DTU module is connected to terminal 485 -B of the inverter.

[0038] The male lead terminal A1 is connected to the lead wire B1 of the wiring harness, the male lead terminal A2 is connected to the lead wire B2 of the wiring harness, the male lead terminal A3 is connected to the lead wire B3 of the wiring harness, and the male lead terminal A4 is connected to the lead wire B4 of the wiring harness.

[0039] Embodiment 2:

[0040] The female connector includes terminals D1, D2, D3 and D4, terminal D1 is connected to terminal VCC+ on the inverter main board, terminal D2 is connected to terminal VCC- on the inverter main board; terminal D1 is connected to lead terminal A1, terminal D2 is connected to lead terminal A2, terminal D3 is connected to lead terminal A2, and terminal D4 is connected to lead terminal A2.

[0041] Embodiment 3:

[0042] The boost regulator module includes a capacitor C arranged between the terminal IN+ and the terminal IN- IN1 and a capacitor C provided between the terminal OUT+ and the terminal OUT- OUT2 ; Inductor L3 and capacitor C are set between terminal IN+ and terminal OUT+ IN2 , Zener diode D1, regulator chip U1 and capacitor C OUT1 .

[0043] Pin 1 of the voltage regulator chip U1 is connected to a resistor R C , pin 1 of the voltage regulator chip U1, pin 2 of the voltage regulator chip U1 and capacitor C OUT1 , capacitor C OUT2 , Zener diode D1 is connected to terminal OUT+, pin 4 of the regulator chip U1 is connected to inductor L3 and Zener diode D1, pin 5 of the regulator chip U1 is connected to terminal IN+, capacitor C IN1 , capacitor C IN2 Connected to inductor L3.

[0044] Embodiment 4:

[0045] A method for using a system for providing power to a micro DTU through an inverter mainboard, comprising the following steps:

[0046] S1. Prepare male interface cable, boost voltage regulator module and DTU module;

[0047] S2, connect the lead wire B1 of the wiring harness of the male interface cable to the terminal IN+ on the boost voltage regulator module, and connect the lead wire B2 of the wiring harness of the male interface cable to the terminal IN- on the boost voltage regulator module;

[0048] S3, connecting the male connector of the male connector cable to the female connector on the inverter mainboard;

[0049] S4, connecting the terminal OUT+ of the boost voltage regulator module to the terminal C1 of the DTU module, and connecting the terminal OUT- of the boost voltage regulator module to the terminal C2 of the DTU module;

[0050] S5. Connect terminal C3 of the DTU module to terminal 485-A of the inverter, and connect terminal C4 of the DTU module to terminal 485-B of the inverter;

[0051] S6. Adjust the voltage knob of the boost regulator module, and use a multimeter to monitor the voltage between the terminals OUT+ and OUT-, and stabilize it at DC12V.

[0052] S7. Place the DTU module and the boost regulator module inside the inverter, and lead out the antenna of the DTU module from the waterproof and dustproof port at the bottom of the inverter;

[0053] S8. Test whether the working power supply of the DTU module is normal and whether the communication with the inverter is normal; if not, check the wiring to make sure the connection is intact.

[0054] In actual use, the power from the terminals VCC+ and VCC- on the inverter mainboard is transmitted to the boost voltage regulator module by using the leads B1 and B2 of the male interface line, thereby providing power to the boost voltage regulator module; at the same time, the male interface line and the inverter are connected by male and female connectors, the terminal D1 of the female connector is connected to the lead terminal A1 of the male connector, and the terminal D2 of the female connector is connected to the lead terminal A2 of the male connector;

[0055] The power transmitted from the inverter is transmitted to the DTU module after the boost and voltage regulation operation of the boost and voltage regulation module, and supplies power to the DTU module. The boost and voltage regulation module uses flyback, boost and forward conversion methods to provide a stable output voltage, and outputs an output power with a wide input voltage range (4V to 40V), high output current capability (5A) and efficient energy conversion function;

[0056] The inverter and DTU module use terminal C3 to connect with terminal 485-A, and terminal C4 to connect with terminal 485-B of the inverter to realize data interaction between the inverter and DTU module;

[0057] This design uses a male interface cable combined with a boost and voltage regulator module to use the inverter to directly power the DTU module, changing the disadvantage that the traditional DTU module requires an external power supply and the power connection operation is troublesome; the DTU module is installed and stored inside the inverter, which solves the problem of the inconvenience of installation and operation of the traditional DTU module, especially when used outdoors, and facilitates the installation and connection of the DTU module.

[0058] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A system for providing power to a micro DTU through an inverter mainboard, characterized in that: The inverter includes a male interface line connected to the inverter, the male interface line is connected to a boost voltage regulator module, the boost voltage regulator module is connected to a DTU module connected to the inverter; the male interface line includes a wiring harness and a male connector, and the male connector is connected to a female connector provided on the inverter mainboard; The lead wire B1 of the wiring harness is connected to the terminal IN+ of the boost voltage regulator module, and the lead wire B2 of the wiring harness is connected to the terminal IN- of the boost voltage regulator module; The terminal OUT+ of the boost and voltage stabilizing module is connected to the terminal C1 of the DTU module, and the terminal OUT- of the boost and voltage stabilizing module is connected to the terminal C2 of the DTU module; The terminal C3 of the DTU module is connected to the terminal 485 -A of the inverter, and the terminal C4 of the DTU module is connected to the terminal 485 -B of the inverter.

2. A system for providing power to a micro DTU through an inverter mainboard as claimed in claim 1, characterized in that: The lead terminal A1 of the male connector is connected to the lead wire B1 of the wiring harness, the lead terminal A2 of the male connector is connected to the lead wire B2 of the wiring harness, the lead terminal A3 of the male connector is connected to the lead wire B3 of the wiring harness, and the lead terminal A4 of the male connector is connected to the lead wire B4 of the wiring harness.

3. A system for providing power to a micro DTU through an inverter mainboard as claimed in claim 1, characterized in that: The female connector includes terminals D1, D2, D3 and D4, terminal D1 is connected to terminal VCC+ on the inverter mainboard, terminal D2 is connected to terminal VCC- on the inverter mainboard; terminal D1 is connected to lead terminal A1, terminal D2 is connected to lead terminal A2, terminal D3 is connected to lead terminal A2, and terminal D4 is connected to lead terminal A2.

4. A system for providing power to a micro DTU through an inverter mainboard as claimed in claim 1, characterized in that: The boost voltage stabilization module includes a capacitor C arranged between the terminal IN+ and the terminal IN- IN1 and a capacitor C provided between the terminal OUT+ and the terminal OUT- OUT2 ; Inductor L3 and capacitor C are set between terminal IN+ and terminal OUT+ IN2 , Zener diode D1, regulator chip U1 and capacitor C OUT1 .

5. A system for providing power to a micro DTU through an inverter mainboard as claimed in claim 4, characterized in that: Pin 1 of the voltage regulator chip U1 is connected to a resistor R C , pin 1 of the voltage regulator chip U1, pin 2 of the voltage regulator chip U1 and capacitor C OUT1 , capacitor C OUT2 , Zener diode D1 is connected to terminal OUT+, pin 4 of the regulator chip U1 is connected to inductor L3 and Zener diode D1, pin 5 of the regulator chip U1 is connected to terminal IN+, capacitor C IN1 , capacitor C IN2 Connected to inductor L3.

6. A method for using a system for providing power to a micro DTU through an inverter mainboard as described in any one of claims 1 to 5, characterized in that: The following steps are involved: S1. Prepare male interface cable, boost voltage regulator module and DTU module; S2, connect the lead wire B1 of the wiring harness of the male interface cable to the terminal IN+ on the boost voltage regulator module, and connect the lead wire B2 of the wiring harness of the male interface cable to the terminal IN- on the boost voltage regulator module; S3, connecting the male connector of the male connector cable to the female connector on the inverter mainboard; S4, connecting the terminal OUT+ of the boost voltage regulator module to the terminal C1 of the DTU module, and connecting the terminal OUT- of the boost voltage regulator module to the terminal C2 of the DTU module; S5. Connect terminal C3 of the DTU module to terminal 485-A of the inverter, and connect terminal C4 of the DTU module to terminal 485-B of the inverter; S6. Adjust the voltage knob of the boost regulator module, and use a multimeter to monitor the voltage between the terminals OUT+ and OUT-, and stabilize it at DC12V. S7. Place the DTU module and the boost regulator module inside the inverter, and lead out the antenna of the DTU module from the waterproof and dustproof port at the bottom of the inverter; S8. Test whether the working power supply of the DTU module is normal and whether the communication with the inverter is normal; if not, check the wiring to make sure the connection is intact.

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