Interleaved parallel phase module and circuit inverter

Abstract

The utility model discloses an interleaved parallel phase module and a circuit inverter. The interleaved parallel phase module comprises a U sub-phase module, a V sub-phase module and a W sub-phase module, the U sub-phase module comprises a first U sub-phase module and a second U sub-phase module, and the first U sub-phase module and the second U sub-phase module are connected in parallel in a staggered manner; wherein the phase difference between the first U sub-phase module and the second U sub-phase module during working is 180 degrees, the phase difference between the first V sub-phase module and the second V sub-phase module during working is 180 degrees, and the phase difference between the first W sub-phase module and the second W sub-phase module during working is 180 degrees. The problem that the size of a circuit inverter is large due to the fact that the switching frequency of the IGBT is not high is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic circuits, in particular to a staggered parallel phase module and a circuit inverter. Background Art

[0002] The energy storage converter PCS, also known as the bidirectional energy storage inverter, is the core component that realizes the bidirectional flow of electric energy between the energy storage system and the power grid. It is used to control the charging and discharging process of the battery and perform AC / DC conversion. The working principle of the energy storage converter is a four-quadrant converter device that can be controlled on the AC and DC sides to realize the bidirectional conversion of electric energy. Currently, small-power PCS complete machines are mostly used for parallel connection to meet the needs of MW-level products.

[0003] In order to achieve high power, the current specification of the key semiconductor device (IGBT) inside the converter is also required to be larger. Therefore, a single IGBT module with high current is required, or the traditional method uses multiple IGBTs with low current in parallel to meet the demand. However, the price of a single IGBT module with high current is expensive and the switching frequency is low, so the volume of the inductor, capacitor and other components used with it is large, which further increases the cost of the system and cannot meet the market demand. The traditional method uses multiple small current IGBTs in parallel to form a power unit, and then multiple identical power units are connected in parallel in the same phase to meet the high power requirements. Although this in-phase parallel method can meet the high power requirements, due to the low switching frequency of the IGBT, the volume of the inductor, capacitor and other components used with it is also large, resulting in a large circuit inverter, high cost, and no market competitiveness. Utility Model Content

[0004] The main purpose of the utility model is to provide a staggered parallel phase module and a circuit inverter, aiming to solve the problem that a plurality of small current IGBTs are connected in parallel to form a power unit, the switching frequency of the IGBTs is not high, and the circuit inverter is prevented from having a large volume.

[0005] To achieve the above object, the utility model provides a staggered parallel phase module comprising:

[0006] U sub-phase module, V sub-phase module and W sub-phase module;

[0007] The U sub-phase module comprises a first U sub-phase module and a second U sub-phase module, wherein the first U sub-phase module and the second U sub-phase module are connected in parallel in an alternating manner;

[0008] The V sub-phase module comprises a first V sub-phase module and a second V sub-phase module, wherein the first V sub-phase module and the second V sub-phase module are connected in parallel in an alternating manner;

[0009] The W sub-phase module comprises a first W sub-phase module and a second W sub-phase module, and the first W sub-phase module and the second W sub-phase module are connected in parallel in an alternating manner;

[0010] The first U sub-phase module, the second U sub-phase module, the first V sub-phase module, the second V sub-phase module, the first W sub-phase module and the second W sub-phase module all have IGBT tube modules, each of which includes a plurality of IGBT tube units, which are mutually staggered and connected in parallel, and each of which includes a plurality of IGBT tubes, which are connected in series up and down;

[0011] The first U sub-phase module and the second U sub-phase module have a phase difference of 180° when in operation, the first V sub-phase module and the second V sub-phase module have a phase difference of 180° when in operation, and the first W sub-phase module and the second W sub-phase module have a phase difference of 180° when in operation.

[0012] As a further solution of the present utility model, the U sub-phase module, the V sub-phase module and the W sub-phase module all have a first input end and a second input end, the first U sub-phase module, the second U sub-phase module, the first V sub-phase module and the second V sub-phase module, the first W sub-phase module and the second W sub-phase module all have a first output end and a second output end, the first output end of the first U sub-phase module is connected to the first output end of the second W sub-phase module through a positive output line, the second output end of the first U sub-phase module is connected to the second output end of the second W sub-phase module through a negative output line, the first output ends of the second U sub-phase module, the first V sub-phase module, the second V sub-phase module and the first W sub-phase module are connected to the positive output line, and the second output ends of the second U sub-phase module, the first V sub-phase module, the second V sub-phase module and the first W sub-phase module are connected to the negative output line.

[0013] As a further solution of the utility model, each of the IGBT tube units includes a first IGBT tube, a second IGBT tube, a first output end and a second output end, the collector of the first IGBT tube is connected to the first output end of the IGBT tube unit, the emitter of the first IGBT tube and the collector of the second IGBT are connected to the input end of the IGBT tube unit, and the emitter of the second IGBT tube is connected to the second output end of the IGBT tube unit, wherein the input ends of each of the IGBT tube units are connected in series.

[0014] As a further solution of the utility model, the IGBT tube module also includes a capacitor module, and the capacitor module is connected in parallel with the plurality of IGBT tube units; the capacitor module is used to absorb interference of output voltages of the plurality of IGBT tube modules.

[0015] As a further solution of the utility model, the capacitor module includes:

[0016] A first capacitor, the first capacitor is connected in parallel with a plurality of the IGBT tube modules, and the first capacitor is used to absorb a voltage spike output when the IGBT tube is switched;

[0017] A second capacitor is connected in parallel with the first capacitor, and the second capacitor is used to stabilize the IGBT tube unit voltage.

[0018] As a further solution of the utility model, the phase module also includes a current sensor, which is connected to the input end of the phase module and close to the front end of the several IGBT tube modules. The current sensor is used to measure the output current of the filter module.

[0019] The utility model also provides a circuit inverter, comprising the phase modules connected in parallel and staggered, and further comprising:

[0020] A filter module, the filter module is used to eliminate interference of input alternating current;

[0021] an interference suppression module, the input end of the interference suppression module being electrically connected to the output end of the phase module, and the interference suppression module being used to suppress current surges from the phase module;

[0022] The input end of the phase module is connected to the output end of the filter module, and the phase module is used to increase the current input from the filter module.

[0023] As a further solution of the utility model, the filtering module includes:

[0024] A first inductor filter module, the input end of the filter module is used to receive alternating current and direct current;

[0025] A first capacitor filter module, wherein an input end of the first capacitor filter module is connected to an output end of the first inductor filter module;

[0026] A second inductor filter module, wherein an input end of the second inductor filter module is connected to an output end of the first capacitor filter module, and an output end of the second inductor filter module is electrically connected to the phase module.

[0027] As a further solution of the utility model, the filtering module includes:

[0028] Three-phase inductor, the three-phase inductor comprises:

[0029] A first three-phase inductor, wherein the first three-phase inductor is arranged on the U line;

[0030] a second three-phase inductor, wherein the first three-phase inductor is arranged on the V line;

[0031] a third three-phase inductor, wherein the first three-phase inductor is arranged on the W line;

[0032] Three-phase capacitor, the three-phase capacitor comprising:

[0033] A first three-phase capacitor, one end of the first three-phase capacitor is connected to the output end of the second three-phase inductor, and the other end of the first three-phase capacitor is electrically connected to the output end of the first three-phase inductor;

[0034] a second three-phase capacitor, wherein one end of the second three-phase capacitor is connected to the output end of the first three-phase inductor, and the other end of the second three-phase capacitor is electrically connected to the output end of the third three-phase inductor;

[0035] a third three-phase capacitor, wherein the third three-phase inductor is connected between the first three-phase capacitor and the second three-phase capacitor;

[0036] A three-phase inductor module, each of which has a first output end and a second output end; the three-phase inductor module comprises:

[0037] A first three-phase inductor module, wherein an input end of the first three-phase inductor module is connected to the first three-phase inductor, a first output end of the first three-phase inductor module is connected to an input end of the first U sub-phase module, and a second output end of the first three-phase inductor module is connected to an input end of the second U sub-phase module;

[0038] A second three-phase inductor module, wherein an input end of the second three-phase inductor module is connected to the second three-phase inductor, a first output end of the second three-phase inductor module is connected to an input end of the first V sub-phase module, and a second output end of the second three-phase inductor module is connected to an input end of the second V sub-phase module;

[0039] A third three-phase inductor module, wherein the input end of the third three-phase inductor module is connected to the third three-phase inductor, the first output end of the third three-phase inductor module is connected to the input end of the first W sub-phase module, and the second output end of the third three-phase inductor module is connected to the input end of the second W sub-phase module.

[0040] Beneficial effects:

[0041] The utility model provides a staggered parallel phase module and a circuit inverter, which include a U sub-phase module, a V sub-phase module and a W sub-phase module; the U sub-phase module includes a first U sub-phase module and a second U sub-phase module, and the first U sub-phase module and the second U sub-phase module are staggered and connected in parallel; the V sub-phase module includes a first V sub-phase module and a second V sub-phase module, and the first V sub-phase module and the second V sub-phase module are staggered and connected in parallel; the W sub-phase module includes a first W sub-phase module and a second W sub-phase module, and the first W sub-phase module and the second W sub-phase module are staggered and connected in parallel; the first U sub-phase module, the second U sub-phase module, the first V sub-phase module, the second V sub-phase module, the first W sub-phase module and the second W sub-phase module all have an IGBT tube module, each of the IGBT tube modules includes a plurality of IGBT tube units, and the I The GBT tube units are staggered and connected in parallel, and each of the IGBT tube units includes several IGBT tubes, and the several IGBT tubes are connected in series up and down; wherein, the first U sub-phase module and the second U sub-phase module have a phase difference of 180 degrees when working, the first V sub-phase module and the second V sub-phase module have a phase difference of 180 degrees when working, and the first W sub-phase module and the second W sub-phase module have a phase difference of 180 degrees when working; it solves the problem that a plurality of traditional small current IGBTs are connected in parallel to form a power unit, and a plurality of identical power units are connected in parallel in the same phase to meet the high power requirements, but the switching frequency of the IGBT is not high, and the problem of large volume of the circuit inverter is prevented. By adopting IGBT tubes in parallel to form a phase module, N (N≥2) phase modules are staggered and controlled, which can effectively expand the capacity of the system, and the power of a single machine can be expanded to above MW level. The current ripple of the circuit inverter can be reduced, and the volume of the matching inductor and other components can be reduced, so as to have the beneficial effects of small volume and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 A schematic diagram of a staggered parallel phase module structure provided in one embodiment of the utility model;

[0043] Figure 2 A schematic diagram of a circuit inverter structure provided in one embodiment of the utility model.

[0044] Description of Figure Numbers:

[0045] A. First U sub-phase module; B. Second U sub-phase module; C. First V sub-phase module; D. Second V sub-phase module; E. First W sub-phase module; F. Second W sub-phase module; G. Suppression module; 1. Negative output line; 2. Positive output line; A1. Current sensor; A2. IGBT tube unit; A21. First IGBT tube; A22. Second IGBT tube.

[0046] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0047] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0048] Those skilled in the art will appreciate that, unless expressly stated otherwise, the singular forms "a", "an", "said", "above", and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present invention refers to the presence of the features, integers, steps, operations, elements, units, modules, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, units, modules, components, and / or groups thereof. It should be understood that when we refer to an element as being "connected" or "coupled" to another element, it may be directly connected or coupled to the other element, or there may be intermediate elements. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The term "and / or" used herein includes all or any unit and all combinations of one or more associated listed items.

[0049] Those skilled in the art will understand that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those generally understood by those skilled in the art in the field to which the present invention belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with the meanings in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as here.

[0050] Reference Figure 1-Figure 2 , Figure 1 A phase module connected in parallel and staggered in one embodiment of the utility model; Figure 2 A schematic structural diagram of a circuit inverter provided in one embodiment of the utility model.

[0051] The interlaced parallel phase module in the utility model includes a U sub-phase module, a V sub-phase module and a W sub-phase module; the U sub-phase module includes a first U sub-phase module A and a second U sub-phase module B, and the first U sub-phase module A and the second U sub-phase module B are interlaced and connected in parallel; the V sub-phase module includes a first V sub-phase module C and a second V sub-phase module D, and the first V sub-phase module C and the second V sub-phase module D are interlaced and connected in parallel; the W sub-phase module includes a first W sub-phase module E and a second W sub-phase module F, and the first W sub-phase module E and the second W sub-phase module F are interlaced and connected in parallel; the first U sub-phase module A, the second U sub-phase module B, the first U sub-phase module A and the second U sub-phase module D are interlaced and connected in parallel. A V sub-phase module C, a second V sub-phase module D, a first W sub-phase module E, and a second W sub-phase module F all have IGBT tube modules, each of the IGBT tube modules includes a plurality of IGBT tube units, the IGBT tube units are staggered and connected in parallel with each other, each of the IGBT tube units includes a plurality of IGBT tubes, and the plurality of IGBT tubes are connected in series up and down, wherein the first U sub-phase module A and the second U sub-phase module B have a phase difference of 180 degrees when working, the first V sub-phase module C and the second V sub-phase module D have a phase difference of 180 degrees when working, and the first W sub-phase module E and the second W sub-phase module F have a phase difference of 180 degrees when working. The first U sub-phase module A and the second U sub-phase module B in the staggered parallel phase modules during operation have a phase difference of 180 degrees, the first V sub-phase module C and the second V sub-phase module D have a phase difference of 180 degrees, and the first W sub-phase module E and the second W sub-phase module F have a phase difference of 180 degrees, generating a larger current. At this time, the current of the phase module is large, so that the volume of the filter module can be reduced, the capacity of the capacitor module can also become smaller, and the cost is saved.

[0052] Traditionally, multiple small current IGBT tubes are connected in parallel to form a power unit, and multiple identical power units are connected in parallel in the same phase to meet high power requirements. However, the switching frequency of IGBT is not high, which leads to the problem of large volume of circuit inverter. By using IGBT tubes in parallel to form a phase module, N (N≥2) phase modules are staggered to effectively expand the capacity of the system, and the power of a single machine can be expanded to more than MW level. As a result, the current ripple of the circuit inverter can be reduced, and the volume of components such as inductors that are matched with the circuit inverter can be reduced, thus having the beneficial effects of small volume and low cost.

[0053] Specifically, the U sub-phase module, the V sub-phase module and the W sub-phase module all have a first input end and a second input end, the first U sub-phase module A, the second U sub-phase module B, the first V sub-phase module C and the second V sub-phase module D, the first W sub-phase module E and the second W sub-phase module F all have a first output end and a second output end, the first output end of the first U sub-phase module is connected to the first output end of the second W sub-phase module through a positive output line, the second output end of the first U sub-phase module is connected to the second output end of the second W sub-phase module through a negative output line 1, the first output ends of the second U sub-phase module B, the first V sub-phase module C, the second V sub-phase module D and the first W sub-phase module E are connected to the positive output line 2, and the The second output ends of the second U sub-phase module B, the first V sub-phase module C, the second V sub-phase module D and the first W sub-phase module are connected to the negative output line 1, and each of the IGBT tube units A2 includes a first IGBT tube A21, a second IGBT tube A22, a first output end and a second output end, the collector of the first IGBT tube A21 is connected to the first output end of the IGBT tube unit, the emitter of the first IGBT tube A21 and the collector of the second IGBT tube A22 are connected to the input end of the IGBT tube unit, and the emitter of the second IGBT tube is connected to the second output end of the IGBT tube unit A2, wherein the input ends of each of the IGBT tube units A2 are connected in series.

[0054] Specifically, the IGBT tube module also includes a capacitor module, and the capacitor module is connected in parallel with several of the IGBT tube units A2; the capacitor module is used to absorb the interference of the output voltage of several IGBT tube modules, and specifically, the capacitor module includes a first capacitor C1 and a second capacitor C2; the first capacitor C1 is connected in parallel with several of the IGBT tube modules, and the first capacitor C1 is close to the output end of the sub-phase module; the first capacitor C1 is used to absorb the voltage spike output when the IGBT tube is switched, and the second capacitor C2 is connected in parallel with the first capacitor C1, and the second capacitor C2 is used to stabilize the IGBT tube unit voltage.

[0055] The phase module also includes a current sensor A1, which is connected to the input end of the phase module and is close to the front end of the IGBT tube modules. The current sensor A1 is used to measure the output current of the filter module. The function of the current sensor A1 is to measure the current, which can help monitor the change of the current, ensure the normal operation of the system, and make necessary adjustments and controls when necessary. This monitoring can help ensure that the output current meets the system requirements and help prevent overload or other problems.

[0056] The utility model also provides a circuit inverter, wherein the circuit inverter includes phase modules staggered in parallel, the circuit inverter includes a filter module and an interference suppression module, the filter module is used to eliminate interference of the input AC current, the input end of the interference suppression module is electrically connected to the output end of the phase module, the interference suppression module is used to suppress the current surge from the phase module, wherein the input end of the phase module is connected to the output end of the filter module, and the phase module is used to increase the current input from the filter module. The phase module is used to increase the current input to the filter module, which can help manage and regulate the power output. This is very important for the stability and efficiency of the system while ensuring that the inverter output meets the requirements. In addition, the role of the interference suppression module is to protect the system from adverse effects such as current surges and ensure clean and stable output. The synergistic effect of these modules helps to improve the overall performance of the inverter and ensure its reliable and efficient operation in practical applications.

[0057] Specifically, the filtering module includes a first inductor filtering module, a first capacitor filtering module and a second inductor filtering module. The input end of the filtering module is used to receive AC current and DC current. The input end of the first capacitor filtering module is connected to the output end of the first inductor filtering module, the input end of the second inductor filtering module is connected to the output end of the first capacitor filtering module, and the output end of the second inductor filtering module is electrically connected to the phase module. The filtering module has high harmonic suppression capability, small size and weight, high stability and reliability, as well as good adaptability and flexibility, provides effective protection and optimization, and improves power quality and stability.

[0058] The interference suppression module has a first input end and a second input end. The first input end of the interference suppression module is connected to the first output end of the first U sub-phase module, and the second input end of the interference suppression module is connected to the second output end of the second U sub-phase module.

[0059] Embodiment 2: The difference from Embodiment 1 is that: the filtering module includes a three-phase inductor, a three-phase capacitor, and a three-phase inductor module, the three-phase inductor includes a first three-phase inductor L1, a second three-phase inductor L2, and a third three-phase inductor L3; the first three-phase inductor L1 is arranged on the U line, the second three-phase inductor L2 is arranged on the V line, and the third three-phase inductor L3 is arranged on the W line; the three-phase capacitor includes a first three-phase capacitor C1, a second three-phase capacitor C2, and a third three-phase capacitor C3; the first three-phase capacitor C1 One end of the first three-phase capacitor C1 is electrically connected to the output end of the first three-phase inductor L2, the other end of the first three-phase capacitor C1 is electrically connected to the output end of the first three-phase inductor L1, one end of the second three-phase capacitor C2 is connected to the output end of the first three-phase inductor L1, the other end of the second three-phase capacitor C2 is electrically connected to the output end of the third three-phase inductor L3, the third three-phase inductor L3 is connected between the first three-phase capacitor C1 and the second three-phase capacitor C2, the three-phase inductor module has a first output end and a second output end, the three The phase inductor module includes a first three-phase inductor module L4, a second three-phase inductor module L5, and a third three-phase inductor module L6; the input end of the first three-phase inductor module L4 is connected to the first three-phase inductor L1, the first output end of the first three-phase inductor module L4 is connected to the input end of the first U sub-phase module A, the second output end 10 of the first three-phase inductor module is connected to the input end of the second U sub-phase module B, the input end of the second three-phase inductor module L5 is connected to the second three-phase inductor L2, The first output end of the second three-phase inductor module L5 is connected to the input end of the first V sub-phase module C, the second output end of the second three-phase inductor module L5 is connected to the input end of the second V sub-phase module D, the input end of the third three-phase inductor module L6 is connected to the third three-phase inductor L3, the first output end of the third three-phase inductor module L6 is connected to the input end of the first W sub-phase module E, and the second output end of the third three-phase inductor module L6 is connected to the input end of the second W sub-phase module F.

[0060] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A phase module connected in parallel, characterized in that: include: U sub-phase module, V sub-phase module and W sub-phase module; The U sub-phase module comprises a first U sub-phase module and a second U sub-phase module, wherein the first U sub-phase module and the second U sub-phase module are connected in parallel in an alternating manner; The V sub-phase module comprises a first V sub-phase module and a second V sub-phase module, wherein the first V sub-phase module and the second V sub-phase module are connected in parallel in an alternating manner; The W sub-phase module comprises a first W sub-phase module and a second W sub-phase module, and the first W sub-phase module and the second W sub-phase module are connected in parallel in an alternating manner; The first U sub-phase module, the second U sub-phase module, the first V sub-phase module, the second V sub-phase module, the first W sub-phase module and the second W sub-phase module all have IGBT tube modules, each of which includes a plurality of IGBT tube units, which are mutually staggered and connected in parallel, and each of which includes a plurality of IGBT tubes, which are connected in series up and down; Among them, the first U sub-phase module and the second U sub-phase module have a phase difference of 180 degrees when working, the first V sub-phase module and the second V sub-phase module have a phase difference of 180 degrees when working, and the first W sub-phase module and the second W sub-phase module have a phase difference of 180 degrees when working.

2. The interleaved parallel phase module according to claim 1, characterized in that: The U sub-phase module, the V sub-phase module and the W sub-phase module all have a first input end and a second input end, the first U sub-phase module, the second U sub-phase module, the first V sub-phase module and the second V sub-phase module, the first W sub-phase module and the second W sub-phase module all have a first output end and a second output end, the first output end of the first U sub-phase module is connected to the first output end of the second W sub-phase module through a positive output line, the second output end of the first U sub-phase module is connected to the second output end of the second W sub-phase module through a negative output line, the first output ends of the second U sub-phase module, the first V sub-phase module, the second V sub-phase module and the first W sub-phase module are connected to the positive output line, and the second output ends of the second U sub-phase module, the first V sub-phase module, the second V sub-phase module and the first W sub-phase module are connected to the negative output line.

3. The interleaved parallel phase module according to claim 2, characterized in that: Each of the IGBT tube units includes a first IGBT tube, a second IGBT tube, a first output end, and a second output end. The collector of the first IGBT tube is connected to the first output end of the IGBT tube unit, the emitter of the first IGBT tube and the collector of the second IGBT are connected to the input end of the IGBT tube unit, and the emitter of the second IGBT tube is connected to the second output end of the IGBT tube unit. The input ends of the various IGBT tube units are connected in series.

4. The interleaved parallel phase module according to claim 2, characterized in that: The IGBT tube module also includes a capacitor module, which is connected in parallel with a plurality of the IGBT tube units; the capacitor module is used to absorb interference of output voltages of a plurality of IGBT tube modules.

5. The interleaved parallel phase module according to claim 4, characterized in that: The capacitor module comprises: A first capacitor, the first capacitor is connected in parallel with a plurality of the IGBT tube modules, and the first capacitor is used to absorb a voltage spike output when the IGBT tube is switched; A second capacitor is connected in parallel with the first capacitor, and the second capacitor is used to stabilize the IGBT tube unit voltage.

6. The staggered parallel phase module according to any one of claims 1 to 5, characterized in that: The phase module further includes a current sensor, which is connected to the input end of the phase module and is close to the front ends of the plurality of IGBT tube modules; wherein the current sensor is used to measure the output AC current of the phase module.

7. A circuit inverter, characterized in that: The method comprises the interlaced parallel phase module according to any one of claims 1 to 6, further comprising: A filter module, the filter module is used to eliminate interference of input alternating current; an interference suppression module, the input end of the interference suppression module being electrically connected to the output end of the phase module, and the interference suppression module being used to suppress current surges from the phase module; The input end of the phase module is connected to the output end of the filter module, and the phase module is used to increase the current input from the filter module.

8. The circuit inverter according to claim 7, characterized in that: The filtering module comprises: A first inductor filter module, the input end of the filter module is used to receive alternating current and direct current; A first capacitor filter module, wherein an input end of the first capacitor filter module is connected to an output end of the first inductor filter module; A second inductor filter module, wherein an input end of the second inductor filter module is connected to an output end of the first capacitor filter module, and an output end of the second inductor filter module is electrically connected to the phase module.

9. The circuit inverter according to claim 7, characterized in that: The filtering module comprises: The three-phase inductor comprises: A first three-phase inductor, wherein the first three-phase inductor is arranged on the U line; a second three-phase inductor, wherein the first three-phase inductor is arranged on the V line; a third three-phase inductor, wherein the first three-phase inductor is arranged on the W line; Three-phase capacitor, the three-phase capacitor comprising: A first three-phase capacitor, one end of the first three-phase capacitor is connected to the output end of the second three-phase inductor, and the other end of the first three-phase capacitor is electrically connected to the output end of the first three-phase inductor; a second three-phase capacitor, wherein one end of the second three-phase capacitor is connected to the output end of the first three-phase inductor, and the other end of the second three-phase capacitor is electrically connected to the output end of the third three-phase inductor; a third three-phase capacitor, wherein the third three-phase inductor is connected between the first three-phase capacitor and the second three-phase capacitor; A three-phase inductor module, each of which has a first output end and a second output end; the three-phase inductor module comprises: A first three-phase inductor module, wherein an input end of the first three-phase inductor module is connected to the first three-phase inductor, a first output end of the first three-phase inductor module is connected to an input end of the first U sub-phase module, and a second output end of the first three-phase inductor module is connected to an input end of the second U sub-phase module; A second three-phase inductor module, wherein an input end of the second three-phase inductor module is connected to the second three-phase inductor, a first output end of the second three-phase inductor module is connected to an input end of the first V sub-phase module, and a second output end of the second three-phase inductor module is connected to an input end of the second V sub-phase module; A third three-phase inductor module, wherein the input end of the third three-phase inductor module is connected to the third three-phase inductor, the first output end of the third three-phase inductor module is connected to the input end of the first W sub-phase module, and the second output end of the third three-phase inductor module is connected to the input end of the second W sub-phase module.

Images