CN219041649U - Inverter and series connection system - Google Patents

Abstract

The utility model aims to provide a safe and reliable inverter power supply which can be applied to various outdoor scenes or emergency scenes. The inverter comprises an inverter device, a first output unit and a first input unit, wherein the first input unit comprises a first signal acquisition end, and the first input unit corresponds to the first output unit. The series effect is realized through the mutual connection between the two inversion devices, so that the voltage boosting is realized, the current used by the load is reduced, and the safety of the load is improved; meanwhile, the weight of the inverter is almost unchanged from that of the original two independent inverter devices, and the use cost is low.

Description

Inverter and series connection system

Technical Field

The utility model relates to the technical field of inverter control, in particular to an inverter and a series connection system formed by combining 2 inverters.

Background

The portable power supply is characterized by being portable, is mainly used for outdoor activities or home zero-time standby power, along with wider application scenes, the requirements on the power supply are also higher, the output voltage of the conventional inversion power supply is 100V/50HZ or 60HZ in Japan, 120V/60HZ in the United states, 220V-240V/50HZ in Europe, asia, the middle east, australia and the like, and particularly in the United states, the voltage input of the household electrical appliance is 120V/60HZ when the household electrical appliance is smaller than 3KW for the safety of users; the voltage input of the household appliance is 240V/60HZ when the household appliance is more than 3 KW. Aiming at high-power electrical appliances, the existing solution is to select a high-power supply or a high-power dual-voltage output power supply, so that the requirements of different voltage classes can be met. The high-power supply not only causes the increase of cost, but also causes the increase of volume, and the portable effect is not achieved.

In the prior art, by combining two low-power supplies, the cost of the high-power supply with the same power is relatively low, and the safety is good, for example, in terms of the cost of the power supplies, the cost of selecting two 3KW power supplies is lower than that of one 6KW power supply, so that a connection mode of connecting a plurality of low-power supplies in series is tried in the prior art. The utility model patent CN201810494008.6 discloses a device and a method for frequency modulation of a generator set, which are characterized in that an isolation series transformer and a series converter are added between a generator end and a low-voltage side of a grid-connected point step-up transformer, and a parallel converter is added on the generator end or the low-voltage side of the grid-connected point step-up transformer to achieve the effect of frequency modulation of the generator set, but the device has a complex structure and huge volume, the whole device is heavier (taking a 3KW generator set or a power supply as an example, the added series transformer exceeds 20 Kg in the connection mode), and particularly when the device is used for inverting the power supply, the cost is greatly increased, and the portable effect is not achieved.

Therefore, how to provide a safe and reliable inverter power supply, so that the inverter power supply can meet the use requirements of different voltage ranges, is a problem to be solved by those skilled in the art.

Disclosure of Invention

The utility model aims to at least solve the technical problems in the prior art, provides a safe and reliable inverter power supply, and can be applied to various outdoor scenes or emergency scenes. In order to achieve the above object of the present utility model, the present utility model provides an inverter device.

The technical scheme of the utility model is realized by the following measures, namely an inverter device is provided with a first output unit, wherein the first output unit comprises an output interface C and an output interface D; the first input unit comprises a first signal acquisition end, and the first input unit corresponds to the first output unit.

Further, the first signal acquisition end comprises an acquisition interface A and an acquisition interface B.

Further, the first signal acquisition end is communicated with the output interface C or the output interface D.

In the application, the inverter device is provided, the corresponding voltage signal is collected by the first signal collection end of the first input unit, so that the voltage signal is fed back to the control module and is used for controlling the first output end to output the voltage and the collected voltage signal to be in the same frequency and phase.

The present application also relates to a combination of a plurality of inverter devices, for example, including two inverter devices, which achieve high-voltage output in a serial manner, and reduce the load bearing rate of the inverter power supply wires.

The technical scheme of the utility model is realized by the following measures, namely a series connection system of inverter devices, which comprises a first inverter device and a second inverter device, wherein the first inverter device is provided with a first output unit, and the first output unit comprises a first output interface 1C and a first output interface 1D; the second inverter is provided with a second output unit, and the second output unit comprises a second output interface 2C and a second output interface 2D; the first output interface 1D is connected with the second output interface 2C, the first output interface 1C is formed with a second output end, and the second output interface 2D is formed with a third output end.

Further, the first inverter device further comprises a first input unit, and the first input unit comprises a first signal acquisition end.

Further, the first signal acquisition end is communicated with the output interface 1C or the output interface 1D.

Still further, the first signal acquisition end is in communication with the output interface 2C and/or the output interface 2D.

Further, the second inverter device further comprises a second input unit, and the second input unit comprises a second signal acquisition end.

Further, the second signal acquisition end is communicated with the output interface 2C or the output interface 2D.

Further, the second signal acquisition end is communicated with the output interface 1C and/or the output interface 1D.

Further, the first output interface 1D and the second output interface 2C are connected to form a first output end.

Further, the first inverter device is provided with a first control unit, the second inverter device is provided with a second control unit, and the first control unit and the second control unit form communication connection.

By providing a combination of the two inverter devices, the two different types of ports in the output power supply of the combination are connected in series, for example, a live wire output port of the first inverter device can be selected to be connected in series with a zero wire output port of the second inverter device, or a zero wire output port of the first inverter device can be selected to be connected in series with a live wire output port of the second inverter device; the output voltage can be increased in a voltage doubling mode, and when the high-power inverter is used for loading high-power electrical appliances, the output current can be effectively reduced, and the bearing rate of the inverter power supply lead is reduced. In addition, this application is still through setting up one or more signal acquisition end for gather the output voltage signal of first inversion device or second inversion device, feed back to this inversion device's control module through the voltage signal who gathers, be used for controlling this inversion device output voltage and the same frequency homophase of the voltage signal who gathers, with this fluctuation that reduces both after establishing ties frequency or voltage reaches and realizes same frequency or homophase effect after establishing ties, lets output voltage more stable.

According to the utility model, a series effect is realized through the mutual connection between the two inverter devices, so that the effects of boosting, reducing the current used by the load and the like are achieved, and the safety of the load is improved; meanwhile, the weight of the inverter is almost unchanged from that of the original two independent inverter devices, and the use cost is low.

The utility model discloses still relate to the terminal box of being convenient for through the external output of inverter after establishing ties in this application, through the terminal box, let inverter's external output form the templet structure, can convenient operation, raise the efficiency.

The technical scheme of the utility model is realized by the following measures that the junction box for series connection of the inverter comprises a 1C junction port, a 1D junction port, a 2C junction port and a 2D junction port, and also comprises a high-voltage output unit; the 1D wiring port is connected with the 2C wiring port, the 1C wiring port is provided with a second output end, and the 2D wiring port is provided with a third output end; the second output terminal and the third output terminal form a high voltage output unit.

Further, a first output end is formed after the 1D wiring port and the 2C wiring port are connected, the device further comprises a 1A wiring port, and the 1A wiring port is communicated with the first output end or the third output end;

further, a first output end is formed after the 1D wiring port and the 2C wiring port are connected, the device further comprises a 2A wiring port, and the 2A wiring port is communicated with the first output end or the second output end;

still further still include 1B wiring mouth and 2B wiring mouth, 1A wiring mouth and 2B wiring mouth all communicate with first output, and 1B wiring mouth communicates with the third output, and 2A wiring mouth communicates with the second output.

Still further, the junction box further includes a low voltage output unit, wherein the first end and the second end form the low voltage output unit, and/or the first end and the third end form the low voltage output unit.

Through setting up the terminal box in this application, let two inverter's serial output form modular structure, in the in-service use, can directly dock with 1C wiring mouth, the 1D wiring mouth of terminal box with two output interface of first inverter, two output interface of second inverter directly dock with 2C wiring mouth, the 2D wiring mouth of terminal box, its serial connection circuit merges in the terminal box, forms a high-pressure delivery outlet at the terminal box simultaneously, the operator of being convenient for uses. In addition, in order to further facilitate the use of operators, one or more low-voltage output ports can be arranged on the junction box, so that the application range of the junction box is improved.

Drawings

FIG. 1 is a schematic diagram of a single inverter device of the present utility model;

FIG. 2 is a schematic diagram of two inverter devices connected in series according to the present utility model;

FIG. 3 is another schematic diagram of two inverter devices of the present utility model connected in series;

FIG. 4 is a schematic diagram of the output ends of two inverter devices connected in series and a junction box according to the present utility model;

reference numerals:

100 first inverter device, 110 first output unit, 120 first input unit, 200 second inverter device, 210 second output unit, 220 second input unit, 310 first output end, 320 second output end, 330 third output end, 400 terminal box, 410 high voltage output unit, 420 low voltage output unit.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. And the terms "first," "second," "third," "1A," "1B," "1C," "1D," "2A," "2B," "2C," "2D," etc. are merely for convenience in describing the utility model and simplifying the description, and do not denote or imply a particular device or particular port to which the utility model is directed, and thus should not be construed as limiting.

In the description of the present utility model, unless specified and limited otherwise, it is to be noted that the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be mechanical or electrical, or may be in communication with each other between two elements, directly or indirectly via an intervening medium, for example. And the term "same frequency" means "same voltage frequency", "same phase" means "same voltage phase"; wherein "same", "identical" shall also be understood in a broad sense, e.g. as being infinitely close to, infinitely approaching; the specific meaning of the terms described above will be understood by those of ordinary skill in the art as the case may be. And the terms "high voltage" and "low voltage" should be understood relatively and are not limited to voltages above 36V or below 36V, which refers to voltages that are relatively high or low as output using the present scheme.

In one embodiment, referring to fig. 1, an inverter device is provided with a first output unit 110, where the first output unit 110 includes an output interface C and an output interface D; a first input unit 120 is further provided, where the first input unit 120 includes a first signal acquisition end, and the first input unit 120 corresponds to the first output unit 110.

In the present application, by providing the inverter device, the power output is performed by using the existing inversion technology, wherein a first output unit 110 is provided, the first output unit 110 includes an output interface C, and corresponds to the live wire output of the power supply; the power supply also comprises an output interface D, which corresponds to zero line output of the power supply and provides power for other loads; the inverter is also provided with a first input unit 120, wherein the first input unit 120 is provided with a first signal acquisition end, and an internal or external electric signal is acquired through the first signal acquisition end, wherein the electric signal in the application comprises a voltage signal or a frequency signal or a phase signal, for example, the electric signal of the first output unit 110 in the inverter can be acquired through the first signal acquisition end, the electric signal carried by the inverter can be acquired, and the electric signals of other inverter can be acquired through the acquired electric signals; the output voltage or frequency of the first output unit 110 is controlled by feeding the output voltage or frequency back to the control unit MCU of the inverter, so as to achieve the effect of adjusting the frequency or phase, so that the output voltage is more stable, and the electricity safety is ensured.

In this application, a process of using an acquired electrical signal to control an output voltage belongs to the prior art, for example, referring to fig. 1, the acquired electrical signal is converted into a square wave signal, and the square wave signal is input into a control unit MCU, and the MCU acquires a rising edge or a falling edge of the square wave signal, and based on the rising edge or the falling edge, adjusts a pulse width of an SPWM wave, so as to control the output voltage, so that a frequency, a phase and the acquired electrical signal voltage are consistent.

Further, in another embodiment of the present application, the first signal acquisition end includes an acquisition interface a and an acquisition interface B. In a specific implementation, the first signal acquisition end may be set as one acquisition port, or may be set as a plurality of acquisition ports, in this embodiment, by setting two acquisition interfaces a and B, more electrical signals may be acquired, or electrical signals at different locations may be acquired through two acquisition interfaces, for example, electrical signals of a load may be acquired through the acquisition interface a, and electrical signals of other inverter devices may be acquired through the acquisition interface B; or the signals of different output ends of other inversion devices are respectively acquired through the acquisition interface A and the acquisition interface B, so that the power supply output of the device is more stable in use.

Further, in another embodiment of the present application, the first signal collecting end is communicated with the output interface C or the output interface D. In a specific implementation, the first signal collecting end may be set as one collecting port, or may also be set as a plurality of collecting ports, where one collecting port is used to connect with the output unit of the inverter device in this embodiment, for example, may be selectively connected with the output interface C or the output interface D, and is used to collect the electrical signal output by the inverter device itself, so as to improve stability and reliability of the output power source.

In another embodiment of the present application, the present application further relates to a series connection system of inverter devices, which uses the two inverter devices to connect in series, so as to achieve the effect of achieving high voltage output, and in a specific embodiment, the series connection system includes a first inverter device 100 and a second inverter device 200, where the first inverter device 100 is provided with a first output unit 110, and the first output unit 110 includes a first output interface 1C and a first output interface 1D; the second inverter device 200 is provided with a second output unit 210, and the second output unit 210 includes a second output interface 2C and a second output interface 2D; the first output interface 1D is connected to the second output interface 2C, the first output interface 1C is formed with a second output end 320, and the second output interface 2D is formed with a third output end 330.

By providing a combination of the two inverter devices, two different types of ports in the output power supply of the two inverter devices are connected in series, for example, a live wire output port of the first inverter device 100 can be selected to be connected in series with a zero wire output port of the second inverter device 200, or a zero wire output port of the first inverter device 100 can be selected to be connected in series with a live wire output port of the second inverter device 200; the output voltage can be increased in a voltage doubling mode, and when the high-power inverter is used for loading high-power electrical appliances, the output current can be effectively reduced, and the bearing rate of the inverter power supply lead is reduced.

Taking a load with the power of 6KW and the voltage of 240V/60HZ as an example, if a 6KW power supply is directly selected, the voltage of 240V/60HZ is huge, the application range is narrow, and the power supply can only be used for 240V voltage; by adopting the technology, the load can be formed by connecting 2 power supplies with 3KW power and 120V/60HZ voltage in series, so that the load use requirement is met, and meanwhile, the volume is saved relative to a high-power supply, and the load is more convenient to carry; in addition, two low-power low-voltage power supplies are connected in series, so that the safety coefficient is high, and the high-voltage and low-voltage can be switched at will. For example, the series connection of the high-voltage power supply can meet the load requirement of 240V/60HZ of high voltage; when the single-unit power supply is used or used in parallel, the load requirement of 120V/60HZ of low voltage can be met, and the application range is wide.

Further, in another embodiment of the present application, a technical solution may be further added to the series connection system, specifically, the first inverter device 100 further includes a first input unit 120, where the first input unit 120 includes a first signal collecting end. By adding a first signal acquisition end to the first inverter device 100, the first signal acquisition end can be used for acquiring an electric signal of an output end of the first inverter device 100, can also be used for acquiring an electric signal of an output end of the second inverter device 200, can also be used for acquiring an electric signal of a load, and is fed back to a control unit of the first inverter device 100 through the acquired electric signal to be used for adjusting an output power supply of the first inverter device 100; especially, the first signal collecting end is used for collecting the output power signal of the second inverter device 200, for example, in another embodiment of the present application, the first signal collecting end is communicated with the output interface 2C and/or the output interface 2D, and is used for collecting the output power signal of the second inverter device 200, and then feeding back to the control unit of the first inverter device 100, so as to control the output power of the first inverter device 100, thereby reducing the frequency fluctuation or the voltage fluctuation caused by the first inverter device 100 and the second inverter device 200 after being connected in series, improving the same frequency or same phase effect of the first inverter device 100 and the second inverter device 200 after being connected in series, and also enabling the output voltage to be more stable.

Still further, in another embodiment of the present application, the first signal collecting end is in communication with the output interface 1C or the output interface 1D; the output power supply of the inverter can be acquired through the first signal acquisition end, so that the inverter can be used for adjusting the stability of power supply output in a series connection system.

Further, in another embodiment of the present application, an electrical signal input unit may be selectively provided to both inverter devices in the serial system, specifically, the second inverter device 200 further includes a second input unit 220, and the second input unit 220 includes a second signal collecting end. The two inversion devices are provided with the signal acquisition ends, so that the frequency of signal acquisition is increased, and the stability of the output power supply after series connection is improved. The second signal collection end of the second input unit 220 may also be selected to collect the output power of the second inverter device 200, for example, in an embodiment of the present application, the second signal collection end is communicated with the output interface 2C or the output interface 2D, so as to improve the reliability of the output power. In another embodiment of the present application, the second signal collecting end is selectively communicated with the output interface 1C and/or the output interface 1D, and corresponds to the first signal collecting end collecting the output interface 2C and/or the output interface 2D, and the frequency and the voltage of the self output power supply are adjusted by mutually collecting the electric signals of the other inverter device, so that the same frequency and the same phase effect after the two inverter devices are connected in series is achieved.

In another embodiment of the present application, as shown in fig. 2 and fig. 4, two inverter devices are connected in series, where the first inverter device 100 is provided with a first signal collecting end, the second inverter device 200 is provided with a second signal collecting end, the first signal collecting ends respectively collect the electrical signals of the second output unit 210 in the second inverter device 200, and the second signal collecting ends respectively collect the electrical signals of the first output unit 110 in the first inverter device 100, so as to achieve the effect of enabling the two inverter devices to be connected in series and then output a more stable power supply.

For convenience of description, the potential ports are respectively designated as 1A, 1B, 1C, 1D, 2A, 2B, 2C, and 2D in this application, reference may be made to fig. 2 and fig. 4, wherein the first inverter device 100 is provided with a first output unit 110, including an output port 1C and an output port 1D, and the second inverter device 200 is provided with a second output unit, including an output port 2C and an output port 2D; in the serial connection of the two, the serial connection is realized through the connection of the output port 1D and the output port 2C; in addition, the first inverter device 100 is provided with a first signal acquisition end, the first signal acquisition end comprises an acquisition port 1A and an acquisition port 1B, the second inverter device 200 is provided with a second signal acquisition end, and the second signal acquisition end comprises an acquisition port 2A and an acquisition port 2B; the first signal acquisition port 1A is used for acquiring an electric signal of the output port 2C in the second inverter, and the first signal acquisition port 1B is used for acquiring an electric signal of the output port 2D in the second inverter; likewise, the second signal acquisition port 2A is used for acquiring the electrical signal of the output port 1C in the first inverter device, and the second signal acquisition port 2B is used for acquiring the electrical signal of the output port 1D in the first inverter device.

In a specific implementation of the foregoing embodiment, the output ports of the first inverter device may be adjusted according to the collected signals of the two ports of the first signal end, for example, the first signal end collecting ports 1A and 1B collect the signals of the second output units 2C and 2D of the second inverter device, so as to adjust the output voltages of the first output units 1C and 1D to be in phase with the same frequency as the second output units, so as to achieve the purpose of serial connection of the two inverter devices, and vice versa.

The specific operation mode is as follows:

the first step, performing routine inspection on two inversion devices to ensure that the two inversion devices can enter a working state, and performing starting operation on the two inversion devices at the moment;

in the second step, one of the inverter devices is started, for example, the first inverter device 100 is started, and since the second inverter device 200 is not started, the first collecting end cannot collect the electric signal of the second output unit 210, and the first inverter device 100 outputs electric power from the first output unit 110 according to a conventional state;

step three, starting another inverter device, namely starting the second inverter device 200, wherein after the second inverter device 200 is started, on one hand, the second acquisition end can adjust the output power of the second output unit 210 by acquiring the electric signal of the first output unit 110; meanwhile, the first collecting end can collect the electrical signal of the second output unit 210, and also adjust the output power of the first output unit 110.

After mutual adjustment in two aspects, the first inverter device 100 and the second inverter device 200 can maintain the same frequency and the same-phase series output.

In another embodiment of the present application, in order to improve the frequency and phase uniformity of the voltage of the two inverter devices after being connected in series, a first control unit may be optionally provided in the first inverter device 100, and a second control unit may be provided in the second inverter device 200, where the first control unit and the second control unit form a communication connection. Referring to fig. 3, a first control unit MCU is disposed in the first inverter device 100, a second control unit MCU is disposed in the second inverter device 200, and the first control unit and the second control unit form a communication connection, in a specific implementation, if the first inverter device 100 is started first, after the second inverter device 200 is started, the first control unit of the first inverter device 100 sends a voltage parameter output by the first output unit 110 to the second control unit, and the second control unit adjusts the voltage parameter output by the second output unit 210 to the outside based on the voltage parameter, so as to realize that the output voltages of the first inverter device and the second inverter device are identical in frequency and phase. Or after the second inverter 200 is started, the first inverter is started, and the second control unit of the second inverter 200 sends the voltage parameter output by the second output unit 210 to the first control unit, and the first control unit adjusts the voltage parameter output by the first output unit 110 to the outside based on the voltage parameter. After both sides start, the first control unit and the second control unit communicate with each other, and the voltage parameters of the corresponding output units are adjusted together, so that the same frequency and phase of the output voltages of the two inverter devices are realized.

The communication connection manner between the first control unit and the second control unit in the present application belongs to the prior art, and for example, a wireless communication connection or a wired communication connection can be selected. In order to improve the compactness of whole connection in this application, after two control unit select wired connection, can select first signal acquisition end and second signal acquisition end in this application as wired connection interface to this commonality that improves this application structure promotes its range of application.

In this application, still relate to a terminal box 400 for inverter series connection, through terminal box 400, can let the inverter after the series connection outwards export and form the templet structure, convenient operation, raise the efficiency. The specific technical scheme is that the high-voltage power supply comprises a 1C wiring port, a 1D wiring port, a 2C wiring port, a 2D wiring port and a high-voltage output unit 410; the 1D wiring port and the 2C wiring port are connected to form a first output end 310,1C wiring port, a second output end 320,2D wiring port and a third output end 330; the second output terminal 320 and the third output terminal 330 form a high voltage output unit 410.

Through setting up terminal box 400 in this application, let two inverter's serial output form modular structure, in the in-service use, can directly dock with 1C wiring mouth, the 1D wiring mouth of terminal box 400 with two output interface of first inverter 100, two output interface of second inverter 200 directly dock with 2C wiring mouth, the 2D wiring mouth of terminal box 400, its series connection circuit merges in terminal box 400, forms a high-voltage outlet at terminal box 400 simultaneously, the operator of being convenient for uses.

In addition, in order to improve stability of the high voltage output port power supply, a signal acquisition interface may be further added to the junction box 400, for example, in other embodiments, the high voltage output port power supply further includes a 1A junction port, where the 1A junction port is communicated with the first output end 310 or the third output end 330, and the first signal acquisition end of the first inverter device 100 may acquire an output electrical signal of the first inverter device 100 or the second inverter device 200 after being connected to the 1A junction port; or in another embodiment, a 2A junction port, the 2A junction port being in communication with the first output 310 or the second output 320; the second signal acquisition end of the second inverter device 200 can acquire the output electric signal of the first inverter device 100 or the second inverter device 200 after being connected with the 2A wiring port; or in other embodiments, the device further comprises a 1B wiring port and a 2B wiring port, wherein the 1A wiring port and the 2B wiring port are both communicated with the first output end 310, the 1B wiring port is communicated with the third output end 330, and the 2A wiring port is communicated with the second output end 320. Through adding one or more wiring ports for connect with signal acquisition end, with this stability that promotes power output.

For further convenience of use, in another embodiment of the present application, the junction box 400 further includes a low voltage output unit 420, wherein the first end and the second end form the low voltage output unit 420, and/or the first end and the third end form the low voltage output unit 420; the range of application of the junction box 400 can be further increased by providing one or more low voltage outlets on the junction box 400.

In this application, referring to fig. 4, the junction box 400 may be formed as a single product, or may be optionally assembled into an inverter serial connection system, that is, an output port of the inverter serial connection system is connected to a junction port corresponding to the junction box, and then the junction box is combined with the inverter serial connection system, so that the inverter serial connection system may also form the high voltage output unit 410 and/or the low voltage output unit 420 for outputting power.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. An inverter device is characterized in that a first output unit (110) is provided, and the first output unit (110) comprises an output interface C and an output interface D; the device is further provided with a first input unit (120), the first input unit (120) comprises a first signal acquisition end, and the first input unit (120) corresponds to the first output unit (110).

2. The inverter device of claim 1, wherein the first signal acquisition terminal comprises an acquisition interface a and an acquisition interface B.

3. The inverter device of claim 1 or 2, wherein the first signal acquisition terminal communicates with the output interface C or the output interface D.

4. A series connection system of inverter devices, characterized by comprising a first inverter device (100) and a second inverter device (200), the first inverter device (100) being provided with a first output unit (110), the first output unit (110) comprising a first output interface 1C and a first output interface 1D; the second inverter device (200) is provided with a second output unit (210), and the second output unit (210) comprises a second output interface 2C and a second output interface 2D; wherein the first output interface 1D is connected to the second output interface 2C, the first output interface 1C is formed with a second output terminal (320), and the second output interface 2D is formed with a third output terminal (330).

5. The inverter series connection system of claim 4, wherein the first inverter (100) further comprises a first input unit (120), the first input unit (120) comprising a first signal acquisition terminal.

6. The inverter series connection system of claim 5 wherein the first signal acquisition terminal communicates with the output interface 1C or the output interface 1D.

7. The inverter series connection system of claim 5 wherein the first signal acquisition terminal communicates with the output interface 2C and/or the output interface 2D.

8. The inverter series connection system of claim 4, 5, 6 or 7, wherein the second inverter (200) further comprises a second input unit (220), the second input unit (220) comprising a second signal acquisition terminal.

9. The inverter series connection system of claim 8 wherein the second signal acquisition terminal communicates with the output interface 1C and/or the output interface 1D.

10. The inverter series connection system according to claim 4, 5, 6, 7 or 9, characterized in that the first inverter (100) is provided with a first control unit and the second inverter (200) is provided with a second control unit, the first and second control units constituting a communication connection.

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