Power frequency inverter

Abstract

The utility model discloses a power frequency inverter. The power frequency inverter comprises a box body and inverter function assemblies, the inverter function assemblies are used for converting direct current into alternating current, the number of the inverter function assemblies is multiple, the multiple inverter function assemblies are installed in the box body, and the multiple inverter function assemblies are connected in parallel. The plurality of low-power inverter functional components are connected in parallel, so that a high-power power frequency inverter can be formed, and the plurality of inverter functional components are integrated in one box body, thereby being beneficial to improving the space utilization rate and reducing the production cost.

Description

Technical Field

[0001] This utility model relates to the field of inverter technology, and more specifically, to a power frequency inverter. Background Technology

[0002] In related technologies, the larger the power of the power frequency inverter, the larger its size. Each power segment has its own power board and matching chassis. There is no shared chassis between different power segments, which leads to resource waste and increased production costs.

[0003] Therefore, a new technical solution is needed to solve the above-mentioned technical problems. Utility Model Content

[0004] One objective of this invention is to provide a new technical solution for a power frequency inverter.

[0005] According to one aspect of this utility model, a power frequency inverter is provided. The power frequency inverter includes:

[0006] Box;

[0007] An inverter functional component is provided, which is used to convert DC power to AC power. Multiple inverter functional components are provided and installed in the enclosure. The multiple inverter functional components are connected in parallel.

[0008] Optionally, the inverter functional components include a power frequency transformer and a power board, wherein the power frequency transformer is electrically connected to the power board.

[0009] Optionally, the inverter functional components further include a filter, which is electrically connected between the power frequency transformer and the power board.

[0010] Optionally, the inverter functional component further includes a relay, which is installed on the inner wall of the enclosure and located at the input and / or output terminals of the inverter functional component.

[0011] Optionally, the power frequency inverter further includes a control board, which is installed on the inner wall of the enclosure and electrically connected to the inverter functional components.

[0012] Optionally, the power frequency inverter further includes an auxiliary power supply, which is installed on the inner wall of the enclosure.

[0013] Optionally, the power frequency inverter also includes an external communication board, which is suitable for electrical connection with external devices.

[0014] Optionally, the power frequency inverter further includes a heat sink, which is installed in the enclosure and is suitable for dissipating heat from the inverter's functional components.

[0015] Optionally, multiple heat sinks are provided, and the multiple heat sinks are connected at intervals to the side wall of the housing.

[0016] Optionally, the inverter functional components are provided in two sets, with the two power frequency transformers having the same power.

[0017] One technical advantage of this application is that multiple low-power inverter functional components are connected in parallel to form a high-power industrial frequency inverter. The integration of multiple inverter functional components in one enclosure helps to improve space utilization and reduce production costs.

[0018] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present invention and, together with their description, serve to explain the principles of the present invention.

[0020] Figure 1 This is a schematic diagram of the internal structure of a power frequency inverter according to an embodiment of the present invention.

[0021] Figure 2 This is a schematic diagram of the internal structure of a power frequency inverter according to another embodiment of the present invention.

[0022] Figure 3 This is a schematic diagram of the internal structure of a power frequency inverter according to another embodiment of the present invention.

[0023] Figure 4 This is a schematic diagram of the internal structure of a power frequency inverter according to another embodiment of the present invention.

[0024] Figure label:

[0025] 1. Enclosure; 2. Power frequency transformer; 3. Power board; 4. Filter; 5. Relay; 6. Control board; 7. Auxiliary power supply; 8. External communication board; 9. Heat sink. Detailed Implementation

[0026] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0027] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0028] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0029] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0030] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0031] According to one embodiment of this application, a power frequency inverter is provided. For example... Figures 1 to 4 As shown, the power frequency inverter includes a housing 1 and inverter functional components. The inverter functional components are used to convert direct current (DC) to alternating current (AC). Multiple inverter functional components are provided and installed within the housing 1, and are connected in parallel.

[0032] In this example, multiple low-power inverter functional components are connected in parallel to form a high-power power frequency inverter. These components are integrated into a single enclosure 1, which improves space utilization and reduces production costs. The power frequency inverter operates synchronously with the grid frequency, typically 50Hz or 60Hz.

[0033] For example, two 10kW inverter functional components are connected in parallel and integrated in enclosure 1 to form a 20kW power frequency inverter. Alternatively, more inverter functional components can be set up, as can be determined by those skilled in the art according to the actual situation, and no specific limitation is made here.

[0034] In this example, multiple inverter functional components are connected in parallel and have a high-power output interface, serving as the high-power output terminal of the line-frequency inverter. Each inverter functional component can also have its own output interface, serving as the low-power output terminal of the line-frequency inverter, thereby enabling the line-frequency inverter to be used in different environments and improving its applicability.

[0035] In one example, such as Figures 1 to 3 As shown, the inverter functional components include a power frequency transformer 2 and a power board 3, and the power frequency transformer 2 is electrically connected to the power board 3.

[0036] In this example, the power frequency transformer 2 is used to step up the low-voltage AC power to the mains standard (e.g., 220V or 380V) while providing electrical isolation to enhance safety. The power board 3 is capable of converting DC power to AC power through high-frequency switching operation.

[0037] On the DC input side, power board 3 converts DC power into pulsating AC power, which is then output to the primary winding of power frequency transformer 2. For example, the power frequency inverter input is low-voltage DC (e.g., 48V), which is then converted into square wave AC power by a full-bridge inverter circuit and subsequently stepped up to 220V or 380V AC power by power frequency transformer 2.

[0038] In this example, the inverter functional components are provided in two sets, with the two power frequency transformers 2 having the same power. For example, the power of both power frequency transformers 2 is 10KW. Those skilled in the art can decide according to the actual situation, and no specific limitation is made here.

[0039] It should be noted that the power frequency transformer 2 can be fixedly installed on the inner wall of the enclosure 1 by welding, bonding, snap-fitting, or screwing fasteners. The power board 3 is installed on the inner wall of the enclosure 1 and is located on one side of the power frequency transformer 2. The power board 3 can also be fixedly installed on the inner wall of the enclosure 1 by welding, bonding, snap-fitting, or screwing fasteners. Of course, the specific installation method of the power frequency transformer 2 and the power board 3 can be determined by those skilled in the art according to the actual situation, and no specific limitation is made here.

[0040] In one example, such as Figure 4 As shown, the inverter functional components also include a filter 4, which is electrically connected between the power frequency transformer 2 and the power board 3.

[0041] In this example, filter 4 filters out high-frequency harmonics and optimizes the output waveform. On the DC input side, filter 4 is electrically connected between the primary winding of the power frequency transformer 2 and the power board 3. The power board 3 converts DC into pulsating AC, which is then filtered by filter 4 to provide a stable input voltage to the power frequency transformer 2. On the AC output side, filter 4 is also connected to the secondary winding of the power frequency transformer 2 to correct the waveform and output AC that is close to a sine wave.

[0042] In one example, such as Figure 2 As shown, the inverter functional component also includes a relay 5, which is installed on the inner wall of the housing 1 and is located at the input and / or output terminals of the inverter functional component.

[0043] like Figure 2As shown, in this example, relay 5 provides protection for both the input and output terminals. Relay 5 acts as an input protection switch to prevent overvoltage damage to the power frequency inverter; simultaneously, it acts as an output protection switch to ensure a safe connection between the AC power output of the power frequency inverter and the power grid. Furthermore, relay 5 functions as a circuit switch and mode control device. When the power frequency inverter needs to switch to power frequency supply due to a fault or specific requirements, relay 5 controls the on / off state of the contactor to achieve a rapid switch between the inverter output and the power frequency supply. For example, if an internal inverter fault causes a shutdown, relay 5 will automatically switch the load to the power frequency supply after a delay, ensuring continuous equipment operation and preventing production interruptions.

[0044] In this example, the overall connection process of the inverter functional components includes:

[0045] In the DC input path:

[0046] DC power supply → input relay → power board → filter → primary winding of power frequency transformer.

[0047] In the communication output path:

[0048] The secondary winding of the power frequency transformer → filter (secondary filter) → output relay → load or power grid.

[0049] In this example, relay 5 is installed on the inner wall of the housing 1. For example, relay 5 can be fixed to the inner wall of housing 1 by welding, bonding, snap-fitting, or screwing. Of course, those skilled in the art can determine the specific installation method of relay 5 according to the actual situation, and no specific limitation is made here.

[0050] In one example, such as Figure 4 As shown, the power frequency inverter also includes a control board 6, which is installed on the inner wall of the housing 1 and is electrically connected to the inverter functional components.

[0051] In this example, control board 6 plays a crucial role in the entire process of power conversion, system protection, and intelligent management within the power frequency inverter. Control board 6 uses a microcontroller to execute a PWM (Pulse Width Modulation) algorithm to generate a sinusoidal drive signal. Control board 6 integrates overvoltage, overcurrent, and overtemperature sensor interfaces, implementing dual protection through hardware comparators and software algorithms. For example, if the temperature exceeds a threshold, the drive signal is immediately cut off, and the cooling system is triggered.

[0052] In one example, the power frequency inverter also includes an auxiliary power supply 7, which is installed on the inner wall of the housing 1.

[0053] like Figure 4As shown, in this example, auxiliary power supply 7 can serve as a backup power source to supply power to critical components inside the power frequency inverter when the main power supply fails or the grid fluctuates, ensuring continuous operation of the system under abnormal conditions. Auxiliary power supply 7 can seamlessly switch over, avoiding production interruptions or data loss. Auxiliary power supply 7 can also block electromagnetic interference (such as high-frequency harmonics and surge currents) between the main circuit and the control system through electrical isolation design, preventing damage to sensitive components (such as microcontrollers and communication modules).

[0054] In this example, the auxiliary power supply 7 is installed on the inner wall of the enclosure 1. For example, the auxiliary power supply 7 can be fixed to the inner wall of the enclosure 1 by welding, bonding, snap-fitting, or screwing. Of course, those skilled in the art can determine the specific installation method of the auxiliary power supply 7 according to the actual situation, and no specific limitation is made here.

[0055] In one example, the power frequency inverter also includes an external communication board 8, which is suitable for electrical connection with external devices.

[0056] like Figure 4 As shown, in this example, the external communication board 8 is equipped with an external interface to collect real-time operating data of the power frequency inverter, including voltage, current, power, temperature, etc., and then encapsulates the data and uploads it to the cloud or local monitoring platform.

[0057] In one example, the power frequency inverter further includes a heat sink 9, which is installed in the housing 1 and is used to dissipate heat from the inverter's functional components.

[0058] like Figures 1 to 3 As shown, a heat sink is installed in the enclosure 1 to dissipate heat from the inverter functional components inside the enclosure 1. For example, the heat sink can be a fan to achieve air cooling, or it can be an aluminum heat sink. Those skilled in the art can decide according to the actual situation, and no specific limitation is made here.

[0059] In this example, multiple heat sinks 9 are provided, and these multiple heat sinks 9 are connected at intervals to the side wall of the housing 1. By providing multiple heat sinks, the heat dissipation effect can be improved, which helps to extend the operating time of the power frequency inverter.

[0060] The above embodiments mainly describe the differences between the various embodiments. As long as the different optimization features between the various embodiments are not contradictory, they can be combined to form a better embodiment. For the sake of brevity, they will not be elaborated here.

[0061] Although specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A line frequency inverter, characterized by It includes: a box (1); an inverter functional assembly for converting direct current into alternating current, the inverter functional assembly is provided with a plurality of inverter functional assemblies installed in the box (1), and the plurality of inverter functional assemblies are connected in parallel.

2. The power frequency inverter according to claim 1, characterized in that The inverter functional assembly includes a power frequency transformer (2) and a power board (3), and the power frequency transformer (2) is electrically connected with the power board (3).

3. The power frequency inverter according to claim 2, characterized in that The inverter functional assembly further includes a filter (4) electrically connected between the power frequency transformer (2) and the power board (3).

4. The power frequency inverter according to claim 3, characterized in that The inverter functional assembly further includes a relay (5) installed on the inner wall of the box (1), and the relay (5) is located at the input end and / or the output end of the inverter functional assembly.

5. The power line inverter of claim 1, wherein The power frequency inverter further includes a control board (6) installed on the inner wall of the box (1), and the control board (6) is electrically connected with the inverter functional assembly.

6. The power line inverter of claim 1, wherein, The power frequency inverter further includes an auxiliary power supply (7) installed on the inner wall of the box (1).

7. The power line inverter of claim 1, wherein The power frequency inverter further includes an external communication board (8) adapted to be electrically connected with external equipment.

8. The power line inverter of claim 1, wherein, The power frequency inverter further includes a heat dissipation member (9) installed on the box (1), and the heat dissipation member (9) is adapted to dissipate heat for the inverter functional assembly.

9. The power line inverter according to claim 8, characterized in that The heat dissipation member (9) is provided with a plurality of heat dissipation members (9) connected in intervals on the side wall of the box (1).

10. The power line inverter of claim 2, wherein, The inverter functional assembly is provided with two groups, and the power of the two power frequency transformers (2) is the same.

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