CN216356515U - Power module device and inverter - Google Patents

Abstract

The utility model relates to a power module device, in particular to a structural design of the power module device, wherein the power module device comprises a filter capacitor bank, a rack and a filter capacitor bracket, wherein the filter capacitor bracket comprises a first side and a second side, the first side of the filter capacitor bracket is fixed on the outer surface of the rack, and the second side of the filter capacitor bracket is used for fixing the filter capacitor bank; the filter capacitor group comprises a first number of filter capacitors, the first number of filter capacitors are arranged in a matrix form, pins of all the filter capacitors are arranged towards the same direction, and one ends of all the filter capacitors departing from the pins are fixed on the second side of the filter capacitor support. The utility model also provides an inverter. The structural design of the power module device provided by the utility model is beneficial to smooth air passage in the rack of the power module device, and the whole size is smaller.

Description

Power module device and inverter

Technical Field

The present invention relates to a power conversion apparatus, and more particularly, to a power module apparatus for an inverter and the inverter.

Background

The power module device is a core part in an energy storage inverter or a photovoltaic inverter and is used for realizing bidirectional inversion of current, namely, the current is converted from direct current to alternating current or from alternating current to direct current, wherein essential electronic components or parts in the power module device comprise a plurality of filter capacitors, a rack and the like.

In the structural design of the existing power module device, a plurality of filter capacitors are generally fixed in the rack, so that an air duct in the rack is easily blocked; furthermore, the layout of the plurality of filter capacitors is usually distributed in a staggered manner in a certain direction, so that the overall size of the power module device is relatively large, and it is difficult to meet the use occasions with specific size requirements for the power module device.

SUMMERY OF THE UTILITY MODEL

In order to enable the position and the layout mode of the filter capacitor in the power module device to be more reasonable, further enable an air duct inside a rack of the power module device to be unobstructed, and enable the overall size of the power module device to be smaller and smaller so as to be suitable for different use occasions, the embodiment of the utility model provides the power module device.

The power module device provided by the embodiment of the utility model comprises a filter capacitor bank, a rack and a filter capacitor support, wherein the filter capacitor support comprises a first side and a second side, the first side of the filter capacitor support is fixed on the outer surface of the rack, and the second side of the filter capacitor support is used for fixing the filter capacitor bank; the filter capacitor group comprises a first number of filter capacitors, the first number of filter capacitors are arranged in a matrix form, pins of all the filter capacitors are arranged towards the same direction, and one ends of all the filter capacitors departing from the pins are fixed on the second side of the filter capacitor support.

In the power module device provided by the embodiment of the utility model, all the filter capacitors are fixed on the second side of the filter capacitor support, and the filter capacitor support is fixed on the outer surface of the rack, so that all the filter capacitors are arranged on the outer side of the rack, and the air duct in the rack is favorably unobstructed. In addition, all the filter capacitors are arranged in a matrix form, and the pins of all the filter capacitors are arranged in the same direction, so that the overall size of the power module device is favorably reduced.

Drawings

In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings used in the description of the embodiment will be briefly introduced below.

FIG. 1 is a schematic circuit block diagram of a conversion circuit block;

fig. 2 is a schematic diagram of a first partial structure of a power module device according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a second partial structure of a power module device according to an embodiment of the utility model;

fig. 4 is a schematic structural diagram of a third part of a power module device according to an embodiment of the present invention;

fig. 5 is a schematic diagram illustrating a fourth partial structure of a power module device according to an embodiment of the utility model;

fig. 6 is a schematic diagram of a fifth partial structure of a power module device according to an embodiment of the present invention;

fig. 7 is a schematic diagram illustrating a sixth partial structure of a power module device according to an embodiment of the utility model;

fig. 8 is a schematic diagram of a seventh partial structure of a power module device according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a power module device according to an embodiment of the present invention.

Detailed Description

In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It should also be understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

The power module device provided by the embodiment of the utility model is applied to a unidirectional inverter or a bidirectional inverter. The unidirectional inverter is a converter which converts direct current electric energy (batteries and storage batteries) into constant-frequency constant-voltage or frequency-modulation voltage-regulation alternating current (generally 220V,50Hz sine wave), and generally comprises a power module device, a direct current electric energy supply (batteries and storage batteries), a cooling fan and the like, wherein the power module device is the most core part of the unidirectional inverter and is used for converting the direct current electric energy into the constant-frequency constant-voltage or frequency-modulation voltage-regulation alternating current.

The bi-directional inverter may be an energy storage inverter, a photovoltaic inverter, or the like. The bidirectional inverter can not only convert dc power into ac power, but also convert ac power into dc power, and generally includes the power module device, which is a most central part of the inverter, for converting dc power into ac power or converting ac power into dc power, dc power (battery, accumulator jar), heat dissipation fan, and the like. The main difference between the inverter and the bi-directional inverter is that the power module arrangement is different and the functions performed by the power module arrangement are different. That is, the inverter is different from the bidirectional inverter in that the inverter is a converter that can only perform one-way current conversion, i.e., dc to ac, and the bidirectional inverter is a converter that can perform two-way current conversion, i.e., dc to ac or ac to dc.

Generally, the power module device of the unidirectional inverter or the bidirectional inverter includes a frame and other parts in addition to the conversion circuit module. The conversion circuit module is a most core part of the power module device, and in the unidirectional inverter, the conversion circuit module is used for converting direct current electric energy into constant-frequency constant-voltage or frequency-modulation voltage-regulation alternating current; in the bidirectional inverter, the conversion circuit module is used for converting direct current electric energy into alternating current or converting alternating current into direct current electric energy; the frame and other parts are used for supporting all electronic components in the conversion circuit module.

Obviously, the bidirectional inverter can realize the function of the unidirectional inverter, and for convenience of description, the following description of the conversion circuit module is given by taking the case that the conversion circuit module can be applied to the bidirectional inverter as an example.

Referring to fig. 1, fig. 1 is a circuit block diagram of a conversion circuit block:

the converter circuit module 100 is a circuit module that is mainly composed of a converter circuit module 101, a filter circuit module 102, and the like and can realize current inversion. The conversion circuit module 101 comprises a positive end, a negative end and an alternating current end, the filter circuit module 102 is connected between the positive end and the negative end of the conversion circuit module 101, the alternating current end of the conversion circuit module 101 is used for outputting three-phase alternating currents L1, L2 and L3, the positive end and the negative end of the conversion circuit module 101 are respectively connected with a direct current positive terminal a and a direct current negative terminal b, and the filter circuit module 102 is connected between the direct current positive terminal a and the direct current negative terminal b.

The conversion circuit module 100 includes two modes: dc to dc mode, ac to dc mode. When the conversion circuit module 100 is in the dc-to-ac mode, the dc power received from the dc positive terminal and the dc negative terminal is filtered by the filter circuit module 102, and then enters the conversion circuit module 101 through the positive terminal and the negative terminal of the conversion circuit module 101 to be inverted to obtain ac power, and the ac power is output through the ac terminal of the conversion circuit module 101, so as to realize the conversion from the dc power to the ac power. The filter circuit module 102 is used for filtering, and particularly for filtering unnecessary electrical signals in the accessed direct current; the function of the conversion circuit module 101 is inversion, and specifically, the direct current input to the conversion circuit module 101 is inverted into alternating current.

When the conversion circuit module 100 is in the ac-to-dc mode, the ac power to be converted into dc power enters the conversion circuit module 101 through the ac end of the conversion circuit module 101 to be rectified to obtain an initial dc power, and since the initial dc power is a pulsating dc power having a large ac ripple and cannot be directly used as a dc power of an electronic circuit, the initial dc power needs to be filtered by the filter circuit module 102 to greatly reduce ac ripple components, so that the waveform of the output dc power is smoother, and the dc power filtered by the filter circuit module 102 is output to a corresponding load circuit through the dc positive terminal and the dc negative terminal, thereby realizing the conversion from ac power to dc power. Wherein the function of the conversion circuit module 101 is rectification, in particular to rectify the alternating current input to the conversion circuit module 101 into initial direct current; since the initial dc rectified by the conversion circuit module 101 has a large ac ripple, the filter circuit module 102 is used for filtering, specifically, reducing the ac ripple component in the initial dc to make the output dc waveform smoother.

Further, the conversion circuit module 101 includes a plurality of switches therein, the plurality of switches constitute a bridge arm circuit, and the conversion circuit module 100 further includes a controller 103 configured to generate a corresponding control signal group to the plurality of switches to control the plurality of switches to be turned on or off correspondingly, so as to implement the dc-to-ac mode or the ac-to-dc mode of the conversion circuit module 100. For example, the controller controls to output a first set of control signals to the switches, so that the converting circuit module 100 realizes the dc-to-ac mode; the controller is also capable of controlling the output of a second set of control signals to the switches, so that the converter circuit module 100 realizes the dc-to-ac mode. The first group of control signals and the second group of control signals are formed by control signals which are respectively applied to the plurality of switches, each control signal in the first group of control signals is preset according to whether the corresponding switch needs to be switched on or off when the direct current is converted into the alternating current, and each control signal in the second group of control signals can also be preset according to whether the corresponding switch needs to be switched on or off when the direct current is converted into the alternating current.

Further, the filter circuit module 102 includes a plurality of filter capacitors, and the filter capacitors are connected in parallel to achieve a better filtering effect.

Therefore, referring to fig. 2, fig. 2 is a schematic diagram of a first partial structure of a power module device according to an embodiment of the present invention:

fig. 2 (a) is a perspective view of a partial structure of the power module apparatus 200, and fig. 2 (b) is a side view of the partial structure of the power module apparatus 200.

The power module device 200 comprises a filter capacitor group 1, a frame 2 and a filter capacitor support 3, the power module device 200 is applied to an inverter, wherein the filter capacitor support 3 comprises a first side a and a second side B, the first side a of the filter capacitor support 3 is fixed on the outer surface of the frame 2, and the second side B of the filter capacitor support 3 is used for fixing the filter capacitor group 1.

The filter capacitor group 1 comprises a first number of filter capacitors 4, the first number of filter capacitors 4 are arranged in a matrix form, pins of all the filter capacitors 4 are arranged in the same direction, and one ends of all the filter capacitors departing from the pins are respectively fixed on the second side B of the filter capacitor support 3. The filter capacitor 4 has two ends, one end of the filter capacitor 4 is used for being fixed on the second side B of the filter capacitor support 3, one end of the filter capacitor 4 is provided with a polarity pin of the filter capacitor 4, and the filter capacitor 4 is not in contact with the rack 2.

Wherein the first number is varied according to the power of the inverter to which the power module device is applied, and in some embodiments, the first number is 15, and as shown in fig. 2, the first number of the filter capacitors 4 arranged in a matrix form includes: the 15 filter capacitors 4 are arranged in a 3 x 5 matrix, in which case the total power of the inverter is 250 kW.

Therefore, the filter capacitor 4 is arranged on the outer side of the frame 2 through the filter capacitor bracket 3 and is not in contact with the frame 2, so that an air duct in the frame 2 can be ensured to be smooth; secondly, the first number of the filter capacitors 4 is arranged in a matrix form, thereby making the overall size of the power module apparatus 200 relatively small to be suitable for use in inverters of different sizes.

Referring to fig. 3, fig. 3 is a schematic diagram of a second partial structure of a power module device according to an embodiment of the present invention:

the power module device 200 further comprises a first busbar 5 and a second busbar 6; the first busbar 5 is used for being connected with the first pole of the filter capacitor bank 1; and the second busbar 6 is used for being connected with the second pole of the filter capacitor group 1.

The filter capacitor bank 1 includes a first pole and a second pole, and in some embodiments, the filter capacitors 4 have no positive or negative pole, so that one pole of all the filter capacitors 4 in the filter capacitor bank 1 is connected to obtain the first pole of the filter capacitor bank 1, and the other pole of all the filter capacitors 4 is connected to obtain the second pole of the filter capacitor bank 1.

In order to better show the connection relationship between the filter capacitor set 1 and the first bus bar 5 and the second bus bar 6, please refer to fig. 4, where fig. 4 is a schematic diagram of a third partial structure of a power module device according to an embodiment of the present invention:

fig. 4 (c) is a perspective view of a partial structure of the power module apparatus 200, and fig. 4 (d) is a rear view of the partial structure of the power module apparatus 200. Fig. 4 only includes the filter capacitor bank 1, the first busbar 5, and the second busbar 6.

The first bus bar 5 comprises the first ports C of the first number, and the first bus bar 5 is respectively connected with one pole of all the filter capacitors 4 forming the first pole through the first ports C; the second bus bar 6 comprises a first number of second ports D, and the second bus bar 6 is respectively connected with one poles of all the filter capacitors 4 forming the second poles through the second ports D.

Referring to fig. 3 and 4, the first busbar 5 and the second busbar 6 are disposed in an overlapping manner, an insulating material is disposed between the first busbar 5 and the second busbar 6, and the first busbar 5 and the second busbar 6 disposed in an overlapping manner are both disposed between the first side a and the second side B of the filter capacitor 4 bracket.

With reference to fig. 3 and fig. 4, a dc positive terminal E is disposed on the first busbar 5, a dc negative terminal F is disposed on the second busbar 6, and the dc positive terminal E and the dc negative terminal F are respectively used for connecting with a positive electrode and a negative electrode of a dc power supply, so as to be used for accessing or outputting a dc power.

The dc power source is a battery or a battery jar installed in the inverter, the battery or the battery jar and the power module device 200 need to be installed to a certain extent, and finally, the dc power from the battery or the battery jar is connected to the conversion circuit of the power module device 200 through the dc positive terminal E and the dc negative terminal F, so as to realize the inversion of converting the dc power into the ac power. In addition, the power module device 200 provided in the embodiment of the present invention can also implement reverse inversion, and when the reverse inversion is to be implemented, after the ac power is converted into the dc power by the power module device 200, the dc power is introduced into the battery or the storage battery through the dc positive terminal E and the dc negative terminal F to charge the battery or the storage battery, so as to implement the inversion from the ac power to the dc power.

Referring to fig. 5, fig. 5 is a schematic diagram of a fourth partial structure of a power module device according to an embodiment of the present invention:

fig. 5 (e) is a schematic perspective view of a partial structure of the power module apparatus 200, fig. 5 (f) is a schematic perspective view of another partial structure of the power module apparatus 200, and fig. 5 (g) is a front view of another partial structure of the power module apparatus 200.

Since the conversion module 8 is generally an electronic component operating at a high frequency, and a large amount of heat is easily generated during operation, thereby affecting the operation efficiency of the conversion module 8, as shown in fig. 5 (e), the power module device 200 further includes a heat sink 7, and the heat sink 7 is fixed to the frame 2.

As shown in (f) of fig. 5, the power module apparatus 200 further includes a conversion module 8, where the conversion module 8 includes a positive terminal, a negative terminal, and an ac terminal, and is configured to control an inversion direction of the power module apparatus, so as to implement ac to dc conversion or dc to ac conversion. The conversion module 8 is fixed on the radiator 7, a positive electrode end of the conversion module 8 is connected with the first electrode of the filter capacitor bank 1, and a negative electrode end of the conversion module 8 is connected with the second electrode of the filter capacitor bank 1; the alternating current end of the conversion module 8 is also connected with an alternating current wiring port.

In some embodiments, the switching module comprises a second number of IGBT (Insulated Gate Bipolar Transistor) modules 9, the IGBT modules 9 comprise a positive electrode, a negative electrode, and an alternating current electrode, the positive electrodes of all the IGBT modules 9 are connected to obtain a positive terminal of the switching module 8, and the negative electrodes of all the IGBT modules 9 are connected to obtain a negative terminal of the switching module 8; the second number of IGBT modules 9 are respectively fixed to the heat sink 7, and the heat sink 7 is configured to dissipate heat generated by the IGBT modules 9 during operation. Wherein the second number varies depending on the actual situation.

The radiator 7 comprises a plurality of metal sheets and a support, the metal sheets are arranged on the support in parallel, and a certain distance and a gap exist between every two metal sheets. The plurality of metal sheets are beneficial to increasing the heat dissipation area and dissipating heat generated when the IGBT module 9 works.

As shown in fig. 5 (G), the first busbar 5 further includes the second number of third ports G for connecting with the positive electrodes of the IGBT modules 9, and the second busbar 6 further includes the second number of fourth ports H for connecting with the negative electrodes of the IGBT modules 9.

The positive terminal of the conversion module 8 is connected to the first pole of the filter capacitor bank 1, and includes: the first busbar 5 is connected with the positive electrodes of the second plurality of IGBT modules 9 through the third port G.

The negative terminal of the conversion module 8 is connected to the second terminal of the filter capacitor bank 1, and includes: the second busbar 6 is connected with the negative electrodes of the second number of IGBT modules 9 through the fourth port H.

The IGBT (Insulated Gate Bipolar Transistor) is a composite fully-controlled voltage-driven power semiconductor device composed of BJT (Bipolar Transistor) and MOS (Insulated Gate field effect Transistor), and includes a base, an emitter, and a collector, and the IGBT module 9 is an electrical signal conversion module mainly formed by connecting and integrating a plurality of IGBTs and other electronic components through a certain circuit. Therefore, the IGBT module 9 integrated by connecting a plurality of IGBTs and other electronic components through a certain circuit has one end for connecting in or out a direct current positive electrode as a positive electrode of the IGBT module 9, one end for connecting in or out a direct current negative electrode of the IGBT module 9 as a negative electrode of the IGBT module 9, and one end for connecting out or connecting in an alternating current of the IGBT module 9 as an alternating current positive electrode.

In some embodiments, the IGBT module comprises two IGBTs, which are connected in series between the positive pole and the negative pole of the IGBT module 9, i.e. the collector of one IGBT is connected to the emitter of the other IGBT, the emitter of one IGBT is connected to the negative pole of the IGBT module 9, and the collector of the other IGBT is connected to the positive pole of the IGBT module 9. The junction between the collector of one IGBT and the emitter of the other IGBT is an output terminal for outputting an alternating current in current inversion and for inputting an alternating current in current rectification, so that the output terminal is an alternating current pole of the IGBT module 9. One IGBT module 9 can realize current inversion or rectification by its internal circuit, but when the positive electrodes of a plurality of IGBT modules 9 are connected and the negative electrodes of a plurality of IGBT modules 9 are connected, higher current density, uniform heat distribution, higher cost performance, and the like can be provided. Thus, in some embodiments, the conversion module includes at least one IGBT module 9, and the positive pole and the negative pole of at least one IGBT module 9 are connected, so as to satisfy different current inversion or rectification effects. When only one IGBT module 9 is included, the conversion module 8 is configured as a half-bridge arm circuit, and when two IGBT modules 9 are included, the conversion module 8 is configured as a full-bridge arm circuit.

Referring to fig. 6, fig. 6 is a schematic diagram of a fifth partial structure of a power module device according to an embodiment of the present invention:

the power module device 200 further comprises three alternating current wiring terminal copper bars 10, the three alternating current wiring terminal copper bars 10 are fixed on the rack 2 through insulating materials respectively, the three alternating current wiring terminal copper bars 10 are used for being connected with an alternating current power supply and further used for outputting or accessing alternating current, and the three alternating current wiring terminal copper bars 10 correspond to three phases in the alternating current power supply respectively.

Alternating current poles in any third number of the IGBT modules 9 are connected to obtain alternating current terminals of the three conversion modules 8, respectively, where the second number is three times the third number.

The alternating current end of the conversion module 8 is connected with an alternating current wiring port, and the conversion module comprises: the alternating current ends of the three conversion modules 8 are respectively connected with the three alternating current wiring terminal copper bars 10.

Alternating current poles in the plurality of IGBT modules 9 are connected, so that alternating current output by the alternating current poles in the IGBT modules 9 can be larger; in addition, when the power module apparatus 200 is to implement reverse inversion, the ac poles of the plurality of IGBT modules 9 are connected to enable the ac poles of the IGBT modules 9 to receive a larger ac current to meet the needs of the inverter, so that the second number and the third number are turned on according to the total power and output current of the inverter, the type and capacity of the IGBT modules 9, and the second number is three times the third number to make the currents output from the three ac terminals or the currents received by the three ac terminals as large as possible. In some embodiments, as shown in fig. 6, the third number is 2, and the ac poles in every two IGBT modules 9 are connected to obtain an ac terminal of the conversion module 8, and connected to one ac terminal copper bar 10.

Referring to fig. 7, fig. 7 is a schematic diagram of a sixth partial structure of a power module device according to an embodiment of the present invention:

the power module apparatus 200 further comprises the second number of absorption capacitors 11, wherein the absorption capacitors 11 comprise a positive electrode and a negative electrode; the second number of absorption capacitors 11 corresponds to the second number of IGBT modules 9, anodes of the second number of absorption capacitors 11 are respectively connected to anodes of the second number of IGBT modules 9, and cathodes of the second number of absorption capacitors 11 are respectively connected to cathodes of the second number of IGBT modules 9. The absorption capacitor 11 is used for eliminating spike voltage caused by stray inductance generated by the first busbar 5 and the second busbar 6 in the working engineering, and the IGBT module 9 is prevented from being damaged. Generally, each absorption capacitor 11 should be connected to each IGBT module 9 when connected

In some embodiments, as shown in fig. 7, the second number is 6, the power module apparatus 200 further includes 6 absorption capacitors 11, an anode of each absorption capacitor 11 is correspondingly connected to an anode of each IGBT module 9 through the third port G on the first busbar 5, and a cathode of each absorption capacitor 11 is correspondingly connected to a cathode of each IGBT module 9 through the fourth port H on the second busbar 6.

Referring to fig. 8, fig. 8 is a schematic diagram of a seventh partial structure of a power module device according to an embodiment of the present invention:

fig. 8 (h) is a perspective view of a part of the power module apparatus 200, and fig. 8 (i) is a perspective view of another part of the power module apparatus 200.

The power module apparatus 200 further includes a controller 13 and a circuit board support 12. The conversion module 8 further comprises a control end, wherein the controller 13 is connected with the control end of the conversion module 8, and the controller 13 is used for controlling the conversion module 8 so as to control the inversion direction of the conversion circuit and realize the conversion from alternating current to direct current or from direct current to alternating current.

As shown in fig. 8 (h), the circuit board support 12 is fixed to the chassis 2, and the circuit board support 12 is used to fix the controller 13.

In some embodiments, as shown in fig. 8 (i), the power module apparatus 200 further includes a circuit board 14, the controller 13 is disposed on the circuit board 14, and the controller 13 includes a plurality of control pins for controlling the IGBT module 9; the IGBT module 9 further includes a controlled end, and the controlled end of the IGBT module 9 constitutes the controlled end of the conversion module 8.

The controller 13 is connected to the control end of the conversion module 8, and includes: each control pin of the controller 13 is connected to the controlled end of a corresponding IGBT module 9, and correspondingly controls the on/off of each IGBT module 9, so as to control the inversion direction of the conversion circuit, and realize the conversion from ac to dc or from dc to ac; the controller 13 is fixed on the circuit board support 12 through the circuit board 14, that is, the controller 13 is disposed on the circuit board 14, and the circuit board 14 is fixed on the circuit board support 12.

In some embodiments, to facilitate the control of the switching module 8, the power module apparatus 200 may include a plurality of the circuit boards 14 and the controllers 13, each of the controllers 13 is disposed on each of the circuit boards 14, and each of the controllers 13 includes a plurality of control pins for controlling the corresponding IGBT module 9. As shown in (i) of fig. 8, the power module apparatus 200 includes 3 circuit boards 14 and controllers 13, each controller 13 controls two IGBT modules 9, and each controller 13 controls one of three ac terminals in the conversion module 8 to output or input.

Referring to fig. 9, fig. 9 is a schematic structural diagram of a power module device according to an embodiment of the present invention:

the power module device 200 further includes an outer cover 15, the outer cover 15 is fixed to the frame 2, the outer cover 15 and the frame 2 form an internal space, and the internal space is used for accommodating part of the power electronic components and parts in the power module device 200, so that most of the power electronic components and parts in the power module device 200 are packaged into a whole and are not easily damaged.

In some embodiments, as shown in fig. 9, since the circuit board support 12 and the frame 2 form a certain internal space for receiving a part of the power electronic components and parts in the power module apparatus 200, the housing cover 15 may also be fixed to the circuit board support 12, and then form another internal space with the circuit board support 12 for receiving the circuit board 14 and the controller 13 fixed on the circuit board support 12, thereby facilitating most of the power electronic components and parts in the power module apparatus 200 to be packaged as a whole and not easily damaged.

An embodiment of the present invention further provides an inverter, which includes an inverter frame, a heat dissipation fan, a dc battery, and the power module apparatus 200. The inverter rack is used for fixing various components in the inverter, and the heat dissipation fan is arranged outside the power module device 200 and in the extension direction of the gap between the metal sheets in the heat sink 7, so that the heat generated by the conversion module 8 is dissipated by matching with the heat sink 7 when the heat dissipation fan works.

The inverter can also be an energy storage inverter or a photovoltaic inverter, not only can realize unidirectional inversion, but also can realize reverse inversion, namely the inverter can convert direct current into alternating current and also can convert alternating current into direct current.

While the utility model has been described with reference to specific embodiments, the utility model is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the utility model. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (13)

1. A power module device applied in an inverter is characterized in that the power module device comprises a filter capacitor set, a frame and a filter capacitor bracket, wherein,

the filter capacitor support comprises a first side and a second side, the first side of the filter capacitor support is fixed on the outer surface of the rack, and the second side of the filter capacitor support is used for fixing the filter capacitor bank;

the filter capacitor group comprises a first number of filter capacitors, the first number of filter capacitors are arranged in a matrix form, pins of all the filter capacitors are arranged towards the same direction, and one ends of all the filter capacitors departing from the pins are fixed on the second side of the filter capacitor support.

2. The power module arrangement according to claim 1, wherein the filter capacitor bank comprises a first pole, a second pole, the power module arrangement further comprising a first bus bar, a second bus bar;

the first busbar is used for being connected with the first pole of the filter capacitor bank;

the second busbar is used for being connected with the second pole of the filter capacitor bank;

wherein one pole of all the filter capacitors in the filter capacitor bank is connected to obtain the first pole of the filter capacitor bank, and the other pole of all the filter capacitors is connected to obtain the second pole of the filter capacitor bank; the first bus bar comprises a first port with the first quantity, and the first bus bar is respectively connected with one poles of all the filter capacitors forming the first poles through the first ports; the second bus bar comprises a first number of second ports, and the second bus bar is respectively connected with one poles of all the filter capacitors forming the second poles through the second ports; the first busbar and the second busbar are arranged in an overlapping mode, an insulating material is arranged between the first busbar and the second busbar, and the first busbar and the second busbar which are arranged in the overlapping mode are arranged between the first side and the second side of the filter capacitor support.

3. The power module device according to claim 2, wherein the first busbar is provided with a dc positive terminal, the second busbar is provided with a dc negative terminal, and the dc positive terminal and the dc negative terminal are respectively used for connecting with a positive electrode and a negative electrode of a dc power supply and further used for connecting or outputting dc power.

4. The power module arrangement according to claim 3, further comprising a heat sink, a conversion module;

the radiator is fixed on the frame;

the conversion module comprises a positive end, a negative end and an alternating current end and is used for controlling the inversion direction of the power module device and realizing the conversion from alternating current to direct current or from direct current to alternating current;

the conversion module is fixed on the radiator, the positive electrode end of the conversion module is connected with the first electrode of the filter capacitor bank, and the negative electrode end of the conversion module is connected with the second electrode of the filter capacitor bank; and the alternating current end of the conversion module is connected with an alternating current wiring port.

5. The power module arrangement according to claim 4, wherein the conversion module comprises a second number of IGBT (Insulated Gate Bipolar Transistor) modules, the IGBT modules comprising a positive pole, a negative pole, and an alternating current pole, the positive poles of all the IGBT modules being connected to obtain a positive terminal of the conversion module, the negative poles of all the IGBT modules being connected to obtain a negative terminal of the conversion module; the second quantity of IGBT modules are respectively fixed on the radiators, and the radiators are used for radiating heat generated by the IGBT modules during working;

the first busbar further comprises a second number of third ports used for being connected with the positive electrodes of the IGBT modules, and the second busbar further comprises a second number of fourth ports used for being connected with the negative electrodes of the IGBT modules;

the positive terminal of the conversion module is connected with the first pole of the filter capacitor bank, and the conversion module comprises: the first busbar is connected with the anodes of the second number of IGBT modules through the third port;

the negative terminal of the conversion module is connected to the second terminal of the filter capacitor bank, and includes: the second busbar is connected with the cathodes of the second number of IGBT modules through the fourth port.

6. The power module device according to claim 5, further comprising three ac wiring terminal copper bars, each of the three ac wiring terminal copper bars being fixed to the frame by an insulating material, each of the three ac wiring terminal copper bars being adapted to be connected to an ac power source for outputting or inputting ac power, wherein each of the three ac wiring terminal copper bars corresponds to three phases of the ac power source;

alternating current poles in any third number of the IGBT modules are connected to obtain alternating current ends of the three conversion modules respectively, wherein the second number is three times that of the third number;

the alternating current end of the conversion module is connected with an alternating current wiring port, and the conversion module comprises: and the alternating current ends of the three conversion modules are respectively connected with the three alternating current wiring end copper bars.

7. The power module apparatus of claim 6, further comprising the second number of absorption capacitors, the absorption capacitors comprising a positive pole and a negative pole;

the second number of absorption capacitors corresponds to the second number of IGBT modules, anodes of the second number of absorption capacitors are respectively and correspondingly connected with anodes of the second number of IGBT modules, and cathodes of the second number of absorption capacitors are respectively and correspondingly connected with cathodes of the second number of IGBT modules.

8. The power module apparatus of claim 7, further comprising a controller;

the conversion module further comprises a controlled end, the controller is connected with the controlled end of the conversion module and used for controlling the conversion module so as to control the inversion direction of the power module device and realize the conversion from alternating current to direct current or from direct current to alternating current.

9. The power module apparatus of claim 8, further comprising a circuit board bracket secured to the frame, the circuit board bracket configured to secure the controller.

10. The power module apparatus of claim 9, further comprising a circuit board, wherein the controller is disposed on the circuit board, wherein the controller comprises a plurality of control pins for controlling the IGBT module; the IGBT module further comprises a controlled end, and the controlled end of the IGBT module forms a controlled end of the conversion module;

the controller with the control end of conversion module is connected, includes: each control pin of the controller is connected to the controlled end of a corresponding IGBT module, and correspondingly controls the on-off of each IGBT module, so that the inversion direction of the power module device is controlled, and the alternating current is converted into the direct current or the direct current is converted into the alternating current; the controller is fixed on the circuit board bracket through the circuit board.

11. The power module device as claimed in claim 10, further comprising a housing cover fixed to the frame, wherein the housing cover and the frame form an internal space for receiving a part of power electronic components and parts in the power module device.

12. An inverter, characterized in that the inverter comprises an inverter frame, a radiator fan, a dc battery and a power module arrangement according to any one of claims 1-11.

13. The inverter of claim 12, wherein the inverter is a storage inverter or a photovoltaic inverter.

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