WO2020108412A1 - Power module and electric power electronic device - Google Patents

Power module and electric power electronic device Download PDF

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Publication number
WO2020108412A1
WO2020108412A1 PCT/CN2019/120403 CN2019120403W WO2020108412A1 WO 2020108412 A1 WO2020108412 A1 WO 2020108412A1 CN 2019120403 W CN2019120403 W CN 2019120403W WO 2020108412 A1 WO2020108412 A1 WO 2020108412A1
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WIPO (PCT)
Prior art keywords
power
bus
power module
phase power
phase
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PCT/CN2019/120403
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French (fr)
Chinese (zh)
Inventor
周党生
吕一航
黄载尧
王琰
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深圳市禾望电气股份有限公司
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Publication of WO2020108412A1 publication Critical patent/WO2020108412A1/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/14—Arrangements for reducing ripples from dc input or output
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output

Definitions

  • This application relates to the field of power electronics technology, in particular to a power module and power electronic equipment.
  • the power module directly determines the performance of the entire wind power converter.
  • the power level and volume of the power module directly determine the power and volume of the entire wind power converter.
  • the power module of the existing converter connects a plurality of power modules in parallel through a common DC bus 13, each power module includes a power unit 11, a plurality of DC bus capacitors 12, and a power unit
  • the AC bus 111 connected to 11 is a module DC bus 112 connected to the power unit 11, the DC bus capacitor 12 and the common DC bus 13.
  • the problem with the power modules of existing converters is that the distance between the power modules on the DC side is long and the ripple current is large.
  • the purpose of the present application is to provide a power module and a power electronic device to solve the problem that the power module of the existing converter has a long DC side distance between power modules and a large ripple current.
  • a power module including 3N single-phase power modules and a DC bus capacitor integrated structure; the 3N single-phase power modules and the DC bus capacitor integrated structure Fixed connection
  • the single-phase power module includes a power unit, a first DC bus and an AC bus connected to the power unit; the DC terminal of the power unit is electrically connected to the first DC bus; The AC end of the power unit is electrically connected to the AC bus discharge;
  • the DC bus capacitor integrated structure includes a capacitor integrated component connected to the 3N single-phase power modules, the capacitor integrated component includes a fixed structural member, M DC bus capacitors corresponding to each single-phase power module, and a second DC Busbars, the M DC bus capacitors are integrated in the fixed structural member; the first DC busbar and the second DC busbar are electrically connected; wherein N and M are both greater than or equal to 1.
  • a power electronic device comprising the above power module.
  • the power module and the power electronic equipment of the embodiment of the present application form a power module through an integrated structure of 3N single-phase power modules and a DC bus capacitor; the single-phase power module does not contain a DC bus capacitor, which reduces the volume and weight of the power module , Reduce maintenance cost and improve maintenance efficiency; DC bus capacitor integrated structure integrated design reduces the module ripple current.
  • Figure 1 is a schematic diagram of an existing power module
  • FIG. 2 is a schematic diagram of a power module according to an embodiment of this application.
  • Figure 3 is an exploded schematic view of Figure 2;
  • FIG. 4 is a schematic diagram of a single-phase power module in a power module according to an embodiment of the present application
  • FIG. 5 is a schematic diagram of another perspective of a single-phase power module in a power module according to an embodiment of the present application.
  • FIG. 6 is a schematic diagram of integration of a DC bus capacitor in a power module according to an embodiment of the present application
  • FIG. 7 is a schematic diagram of a power module formed by integrating a single-phase power module and a DC bus capacitor according to an embodiment of the present application;
  • FIG. 8 is a schematic diagram of another power module formed by integrating a single-phase power module and a DC bus capacitor according to an embodiment of the present application.
  • the first embodiment of the present application provides a power module.
  • the power module includes 3N single-phase power modules 21 and a DC bus capacitor integrated structure 22; the 3N single-phase power The module 21 and the DC bus capacitor integrated structure 22 are fixedly connected; where N is greater than or equal to 1.
  • the number of single-phase power modules 21 is not limited herein.
  • the 3N single-phase power modules 21 and the DC bus capacitor integrated structure 22 may be fixedly connected together by screws (not shown in the drawings), or may be connected together by other methods. Not limited.
  • the single-phase power module 21 includes a heat exchanger 212, a power unit 213, a first DC bus 211, an AC bus 215, and a housing 216;
  • the power unit 213 is fixedly installed on one or both sides of the heat exchanger 212; the DC terminal of the power unit 213 is electrically connected to the first DC bus 211; the AC of the power unit 213 The terminal is electrically connected to the AC bus bar 215; the first DC bus bar 211 and the AC bus bar 215 form an electrical interface for external connection.
  • the heat exchanger 212, the power unit 213, the first DC bus 211, and the AC bus 215 are disposed in the internal space of the housing 216.
  • the first DC busbar 211 includes positive and negative DC busbars, and an insulating film (not shown in the drawings) disposed between the positive and negative DC busbars.
  • the heat exchanger 212 is a plate-shaped water-cooled heat exchanger.
  • the power unit 213 works by including but not limited to IGBT, IGCT, IEGT and other power devices, and does not include a DC bus capacitor.
  • the DC terminal of the power unit 213 and the first DC bus bar 211 are fastened by screws 2131; the AC terminal of the power unit 213 and the AC bus The row 215 is fastened by screws 2132.
  • the single-phase power module further includes a driving board 214 connected to the power unit 213.
  • the driving board 214 may be independently installed on the heat exchanger 212; or the driving board 214 and the power unit 213 are integrated together.
  • the DC bus capacitor integrated structure 22 includes a fixed structural member 222, M DC bus capacitors 221 corresponding to each single-phase power module 21, and a second DC bus bar 223.
  • the second DC bus 223 is electrically connected to the first DC bus 211.
  • the M DC bus capacitors 221 are fixed on the fixed structural member 222, and the fixed structural member 222 is a sheet metal structural member.
  • the positive and negative poles of the M DC bus capacitors 221 are electrically connected through a second DC bus 223, which includes a positive and negative DC bus and an insulating film disposed between the positive and negative DC bus Not shown).
  • M is greater than or equal to 1, it should be noted that the number of M can be set according to N single-phase power modules 21. For example: as shown in FIGS. 2 and 6, 18 single-phase power modules 21 are provided with 18 DC bus capacitors 221.
  • the M DC bus capacitors 221 and the second DC bus bar 223 may be fixed by screws and nuts (not shown in the drawings). It should be noted that the number of DC bus capacitors 221 is not limited herein. Through the integrated design of the DC bus capacitor 221, the ripple current of the module can be reduced.
  • the 3N single-phase power modules 21 may be disposed on both sides of the DC bus capacitor integrated structure 22, and the number of single-phase power modules on each side is equal; where N It is an integer multiple of 2.
  • the single-phase power module 21 on the upper layer of the DC bus capacitor integrated structure 22 may constitute a rectifier module, and the single-phase power module 21 on the lower layer may constitute an inverter module (or vice versa), so that from top to bottom Forming a rectifier module, a DC bus module and an inverter module, the formed power path is shorter.
  • the DC bus capacitor integrated structure 22 and the single-phase power modules 21 on both sides can be integrated into an independent unit and installed in a power electronic device as a whole; or, the DC bus capacitor integrated structure 22 and the two
  • the single-phase power module 21 on the side forms three independent units installed in power electronic equipment, such as a rectifier unit, a DC bus unit, and an inverter unit.
  • the power module in the embodiment of the present application is composed of 3N single-phase power modules and a DC bus capacitor integrated structure; the single-phase power module does not contain a DC bus capacitor, which reduces the size and weight of the power module and reduces maintenance Cost and improve maintenance efficiency; DC bus capacitor integrated structure integrated design reduces the ripple current of the module.
  • a second embodiment of the present application provides a power electronic device.
  • the power electronic device includes the power module described in the first embodiment.
  • the power module can refer to the content described in the first embodiment, and will not be repeated here.
  • the power electronic device includes but is not limited to a photovoltaic inverter and a wind power converter.
  • the power electronic equipment of the embodiment of the present application forms a power module through the integrated structure of 3N single-phase power modules and a DC bus capacitor; the single-phase power module does not contain a DC bus capacitor, which reduces the volume and weight of the power module and reduces maintenance Cost and improve maintenance efficiency; DC bus capacitor integrated structure integrated design reduces the ripple current of the module.

Abstract

Disclosed are a power module and an electric power electronic device. The power module comprises 3N single-phase power modules (21) and a direct-current bus capacitor integration structure (22), wherein the 3N single-phase power modules (21) are fixedly connected to the direct-current bus capacitor integration structure (22); the single-phase power module (21) comprises a power unit (213), a first direct-current busbar (211) and an alternating-current busbar (215), a direct-current end of the power unit (213) is electrically connected to the first direct-current busbar (211), and an alternating-current end is electrically connected to the alternating-current busbar (215); and the direct-current bus capacitor integration structure (22) comprises a capacitor integration assembly, the capacitor integration assembly comprises a fixing structural member (222), M direct-current bus capacitors (221) and a second direct-current busbar (223), and the M direct-current bus capacitors (221) are integrated into the fixing structural member (222); and the first direct-current busbar (211) is electrically connected to the second direct-current busbar (223). The power module is constituted by means of the 3N single-phase power modules (21) and the direct-current bus capacitor integration structure (22), the single-phase power module (21) does not contain a direct-current bus capacitor, and the direct-current bus capacitor integration structure (22) has an integrated design, thereby reducing a ripple current of a module.

Description

功率模组以及电力电子设备Power module and power electronic equipment 技术领域Technical field
本申请涉及电力电子技术领域，尤其涉及一种功率模组以及电力电子设备。This application relates to the field of power electronics technology, in particular to a power module and power electronic equipment.
背景技术Background technique
随着风力发电机组的单机容量向大功率化发展和海上风电日益成为发展趋势，风电行业对高集成的大功率变流器的需求也日益增加。功率模组作为风电变流器内部的核心器件，其性能的优劣直接决定整个风电变流器的性能，功率模组的功率等级和体积直接决定了整个风电变流器的功率和体积。As the stand-alone capacity of wind turbines develops towards higher power and offshore wind power is becoming a trend, the demand for highly integrated high-power converters in the wind power industry is also increasing. As the core device inside the wind power converter, the power module directly determines the performance of the entire wind power converter. The power level and volume of the power module directly determine the power and volume of the entire wind power converter.
如图1所示，现有变流器的功率模组是通过共用直流母排13将多个功率模块并联连接，每一个功率模块均包括功率单元11、多个直流母线电容12、与功率单元11连接的交流母排111，与功率单元11、直流母线电容12以及共用直流母排13连接的模块直流母排112。As shown in FIG. 1, the power module of the existing converter connects a plurality of power modules in parallel through a common DC bus 13, each power module includes a power unit 11, a plurality of DC bus capacitors 12, and a power unit The AC bus 111 connected to 11 is a module DC bus 112 connected to the power unit 11, the DC bus capacitor 12 and the common DC bus 13.
现有变流器的功率模组存在的问题是，功率模块之间的直流侧距离远，纹波电流大。The problem with the power modules of existing converters is that the distance between the power modules on the DC side is long and the ripple current is large.
发明内容Summary of the invention
有鉴于此，本申请的目的在于提供一种功率模组以及电力电子设备，以解决现有变流器的功率模组存在的功率模块之间的直流侧距离远，纹波电流大的问题。In view of this, the purpose of the present application is to provide a power module and a power electronic device to solve the problem that the power module of the existing converter has a long DC side distance between power modules and a large ripple current.
本申请解决上述技术问题所采用的技术方案如下：The technical solutions adopted by this application to solve the above technical problems are as follows:
根据本申请的一个方面，提供的一种功率模组，所述功率模组包括3N个单相功率模块、直流母线电容集成结构；所述3N个单相功率模块和所述直流母线电容集成结构固定连接；According to an aspect of the present application, there is provided a power module including 3N single-phase power modules and a DC bus capacitor integrated structure; the 3N single-phase power modules and the DC bus capacitor integrated structure Fixed connection
所述单相功率模块包括功率单元、与所述功率单元连接的第一直流母排和交流母排；所述功率单元的直流端与所述第一直流母排电性连接；所述功率单元的交流端与所述交流母排电性连接；The single-phase power module includes a power unit, a first DC bus and an AC bus connected to the power unit; the DC terminal of the power unit is electrically connected to the first DC bus; The AC end of the power unit is electrically connected to the AC bus discharge;
所述直流母线电容集成结构包括与所述3N个单相功率模块连接的电容集成组件，所述电容集成组件包括固定结构件、与各个单相功率模块对应的M 个直流母线电容以及第二直流母排，所述M个直流母线电容集成于所述固定结构件中；所述第一直流母排与所述第二直流母排电性连接；其中N、M均大于或等于1。The DC bus capacitor integrated structure includes a capacitor integrated component connected to the 3N single-phase power modules, the capacitor integrated component includes a fixed structural member, M DC bus capacitors corresponding to each single-phase power module, and a second DC Busbars, the M DC bus capacitors are integrated in the fixed structural member; the first DC busbar and the second DC busbar are electrically connected; wherein N and M are both greater than or equal to 1.
根据本申请的一个方面，提供的一种电力电子设备，所述电力电子设备包括上述的功率模组。According to an aspect of the present application, there is provided a power electronic device, the power electronic device comprising the above power module.
本申请实施例的功率模组以及电力电子设备，通过3N个单相功率模块和直流母线电容集成结构构成功率模组；单相功率模块内不含有直流母线电容，降低了功率模块的体积和重量，减少了维护的成本和提高维护效率；直流母线电容集成结构集成设计，减少了模块的纹波电流。The power module and the power electronic equipment of the embodiment of the present application form a power module through an integrated structure of 3N single-phase power modules and a DC bus capacitor; the single-phase power module does not contain a DC bus capacitor, which reduces the volume and weight of the power module , Reduce maintenance cost and improve maintenance efficiency; DC bus capacitor integrated structure integrated design reduces the module ripple current.
附图说明BRIEF DESCRIPTION
图1为现有的功率模组示意图；Figure 1 is a schematic diagram of an existing power module;
图2为本申请实施例的功率模组示意图；2 is a schematic diagram of a power module according to an embodiment of this application;
图3为图2的分解示意图；Figure 3 is an exploded schematic view of Figure 2;
图4为本申请实施例的功率模组中单相功率模块示意图；4 is a schematic diagram of a single-phase power module in a power module according to an embodiment of the present application;
图5为本申请实施例的功率模组中单相功率模块另一视角的示意图；5 is a schematic diagram of another perspective of a single-phase power module in a power module according to an embodiment of the present application;
图6为本申请实施例的功率模组中直流母线电容集成示意图；6 is a schematic diagram of integration of a DC bus capacitor in a power module according to an embodiment of the present application;
图7为本申请实施例的单相功率模块和直流母线电容集成形成的功率模组示意图；7 is a schematic diagram of a power module formed by integrating a single-phase power module and a DC bus capacitor according to an embodiment of the present application;
图8为本申请实施例的单相功率模块和直流母线电容集成形成的另一功率模组示意图。8 is a schematic diagram of another power module formed by integrating a single-phase power module and a DC bus capacitor according to an embodiment of the present application.
本申请目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。The implementation, functional characteristics and advantages of the present application will be further described in conjunction with the embodiments and with reference to the drawings.
具体实施方式detailed description
为了使本申请所要解决的技术问题、技术方案及有益效果更加清楚、明白，以下结合附图和实施例，对本申请进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本申请，并不用于限定本申请。In order to make the technical problems, technical solutions, and beneficial effects to be solved by the present application clearer and more clear, the present application will be described in further detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.
第一实施例First embodiment
如图2或图3所示，本申请第一实施例提供一种功率模组，所述功率模组包括3N个单相功率模块21、直流母线电容集成结构22；所述3N个单相功率模块21和所述直流母线电容集成结构22固定连接；其中N大于或等于1。As shown in FIG. 2 or FIG. 3, the first embodiment of the present application provides a power module. The power module includes 3N single-phase power modules 21 and a DC bus capacitor integrated structure 22; the 3N single-phase power The module 21 and the DC bus capacitor integrated structure 22 are fixedly connected; where N is greater than or equal to 1.
在本实施例中，单相功率模块21的数量在此不作限定。In this embodiment, the number of single-phase power modules 21 is not limited herein.
在本实施例中，所述3N个单相功率模块21和所述直流母线电容集成结构22可以通过螺钉(附图未示出)固定连接在一起，也可以通过其他方式连接在一起，在此不作限定。In this embodiment, the 3N single-phase power modules 21 and the DC bus capacitor integrated structure 22 may be fixedly connected together by screws (not shown in the drawings), or may be connected together by other methods. Not limited.
请参考图4所示，在本实施例中，所述单相功率模块21包括换热器212、功率单元213、第一直流母排211、交流母排215以及外壳216；Referring to FIG. 4, in this embodiment, the single-phase power module 21 includes a heat exchanger 212, a power unit 213, a first DC bus 211, an AC bus 215, and a housing 216;
所述功率单元213固定安装在所述换热器212的一侧或两侧；所述功率单元213的直流端与所述第一直流母排211电性连接；所述功率单元213的交流端与所述交流母排215电性连接；所述第一直流母排211及所述交流母排215形成对外连接的电气接口。所述换热器212、所述功率单元213、所述第一直流母排211以及所述交流母排215设置在所述外壳216的内部空间。其中，所述第一直流母排211包括正负直流母排、以及设置于正负直流母排之间的绝缘膜(附图未示出)。The power unit 213 is fixedly installed on one or both sides of the heat exchanger 212; the DC terminal of the power unit 213 is electrically connected to the first DC bus 211; the AC of the power unit 213 The terminal is electrically connected to the AC bus bar 215; the first DC bus bar 211 and the AC bus bar 215 form an electrical interface for external connection. The heat exchanger 212, the power unit 213, the first DC bus 211, and the AC bus 215 are disposed in the internal space of the housing 216. The first DC busbar 211 includes positive and negative DC busbars, and an insulating film (not shown in the drawings) disposed between the positive and negative DC busbars.
在本实施例中，所述换热器212为板状的水冷换热器。In this embodiment, the heat exchanger 212 is a plate-shaped water-cooled heat exchanger.
在本实施例中，所述功率单元213通过包括但不限于IGBT、IGCT、IEGT等功率器件进行工作，不含直流母线电容。In this embodiment, the power unit 213 works by including but not limited to IGBT, IGCT, IEGT and other power devices, and does not include a DC bus capacitor.
请参考图5所示，在本实施例中，所述功率单元213的直流端与所述第一直流母排211通过螺钉2131紧固；所述功率单元213的交流端与所述交流母排215通过螺钉2132紧固。Referring to FIG. 5, in this embodiment, the DC terminal of the power unit 213 and the first DC bus bar 211 are fastened by screws 2131; the AC terminal of the power unit 213 and the AC bus The row 215 is fastened by screws 2132.
请再参考图4所示，所述单相功率模块还包括与所述功率单元213连接的驱动板214。Referring again to FIG. 4, the single-phase power module further includes a driving board 214 connected to the power unit 213.
在本实施例中，所述驱动板214可独立安装在所述换热器212上；或者所述驱动板214和所述功率单元213集成在一起。In this embodiment, the driving board 214 may be independently installed on the heat exchanger 212; or the driving board 214 and the power unit 213 are integrated together.
请参考图6所示，在本实施例中，所述直流母线电容集成结构22包括固定结构件222、与各个单相功率模块21对应的M个直流母线电容221以及第 二直流母排223。其中，第二直流母排223与第一直流母排211电性连接。Referring to FIG. 6, in this embodiment, the DC bus capacitor integrated structure 22 includes a fixed structural member 222, M DC bus capacitors 221 corresponding to each single-phase power module 21, and a second DC bus bar 223. The second DC bus 223 is electrically connected to the first DC bus 211.
M个直流母线电容221固定在所述固定结构件222上，所述固定结构件222为钣金结构件。M个直流母线电容221的正负极通过第二直流母排223电性连接，第二直流母排223包括正负直流母排、以及设置于正负直流母排之间的绝缘膜(附图未示出)。其中M大于或等于1，需要说明的是M的数量可以根据N个单相功率模块21来进行设置。例如：图2和图6所示，6个单相功率模块21设置了18个直流母线电容221。The M DC bus capacitors 221 are fixed on the fixed structural member 222, and the fixed structural member 222 is a sheet metal structural member. The positive and negative poles of the M DC bus capacitors 221 are electrically connected through a second DC bus 223, which includes a positive and negative DC bus and an insulating film disposed between the positive and negative DC bus Not shown). Where M is greater than or equal to 1, it should be noted that the number of M can be set according to N single-phase power modules 21. For example: as shown in FIGS. 2 and 6, 18 single-phase power modules 21 are provided with 18 DC bus capacitors 221.
在本实施例中，M个直流母线电容221和第二直流母排223之间可以通过螺钉和螺母(附图未示出)进行固定。需要说明的是，直流母线电容221的数量在此不作限定。通过直流母线电容221的集成设计，可减少模块的纹波电流。In this embodiment, the M DC bus capacitors 221 and the second DC bus bar 223 may be fixed by screws and nuts (not shown in the drawings). It should be noted that the number of DC bus capacitors 221 is not limited herein. Through the integrated design of the DC bus capacitor 221, the ripple current of the module can be reduced.
请参考图7所示，在一示例中，所述3N个单相功率模块21可以设置于所述直流母线电容集成结构22的两侧，且每侧的单相功率模块的数量相等；其中N为2的整数倍。Please refer to FIG. 7, in an example, the 3N single-phase power modules 21 may be disposed on both sides of the DC bus capacitor integrated structure 22, and the number of single-phase power modules on each side is equal; where N It is an integer multiple of 2.
以N＝4为例，12个单相功率模块21对称地设置于所述直流母线电容集成结构22的两侧，每一侧都是6个单相功率模块21并且朝着相对的方向一一对应设置。Taking N=4 as an example, 12 single-phase power modules 21 are symmetrically arranged on both sides of the DC bus capacitor integrated structure 22, each side is 6 single-phase power modules 21 and one by one in the opposite direction Corresponding settings.
在该示例中，所述直流母线电容集成结构22上层的单相功率模块21可以构成一个整流模块，下层的单相功率模块21可以构成一个逆变模块(反之亦可)，这样从上到下形成整流模块、直流母线模块以及逆变模块，形成的功率路径较短。In this example, the single-phase power module 21 on the upper layer of the DC bus capacitor integrated structure 22 may constitute a rectifier module, and the single-phase power module 21 on the lower layer may constitute an inverter module (or vice versa), so that from top to bottom Forming a rectifier module, a DC bus module and an inverter module, the formed power path is shorter.
在该示例中，所述直流母线电容集成结构22和两侧的单相功率模块21可以集成为一个独立的单元整体地安装在电力电子设备中；或者，所述直流母线电容集成结构22和两侧的单相功率模块21形成三个独立的单元分别安装在电力电子设备中，例如：整流单元、直流母线单元以及逆变单元。In this example, the DC bus capacitor integrated structure 22 and the single-phase power modules 21 on both sides can be integrated into an independent unit and installed in a power electronic device as a whole; or, the DC bus capacitor integrated structure 22 and the two The single-phase power module 21 on the side forms three independent units installed in power electronic equipment, such as a rectifier unit, a DC bus unit, and an inverter unit.
请参考图8所示，所述3N个单相功率模块21可以设置于所述直流母线电容集成结构22的一侧。以N＝2为例，6个单相功率模块21全部设置于所述直流母线电容集成结构22的一侧。Please refer to FIG. 8, the 3N single-phase power modules 21 may be disposed on one side of the DC bus capacitor integrated structure 22. Taking N=2 as an example, the six single-phase power modules 21 are all disposed on one side of the DC bus capacitor integrated structure 22.
本申请实施例的功率模组，通过3N个单相功率模块和直流母线电容集成 结构构成功率模组；单相功率模块内不含有直流母线电容，降低了功率模块的体积和重量，减少了维护的成本和提高维护效率；直流母线电容集成结构集成设计，减少了模块的纹波电流。The power module in the embodiment of the present application is composed of 3N single-phase power modules and a DC bus capacitor integrated structure; the single-phase power module does not contain a DC bus capacitor, which reduces the size and weight of the power module and reduces maintenance Cost and improve maintenance efficiency; DC bus capacitor integrated structure integrated design reduces the ripple current of the module.
第二实施例Second embodiment
本申请第二实施例提供一种电力电子设备，所述电力电子设备包括第一实施例所述的功率模组。功率模组可参考第一实施例所述内容，在此不作赘述。A second embodiment of the present application provides a power electronic device. The power electronic device includes the power module described in the first embodiment. The power module can refer to the content described in the first embodiment, and will not be repeated here.
在本实施例中，所述电力电子设备包括但不限于光伏逆变器、风电变流器。In this embodiment, the power electronic device includes but is not limited to a photovoltaic inverter and a wind power converter.
本申请实施例的电力电子设备，通过3N个单相功率模块和直流母线电容集成结构构成功率模组；单相功率模块内不含有直流母线电容，降低了功率模块的体积和重量，减少了维护的成本和提高维护效率；直流母线电容集成结构集成设计，减少了模块的纹波电流。The power electronic equipment of the embodiment of the present application forms a power module through the integrated structure of 3N single-phase power modules and a DC bus capacitor; the single-phase power module does not contain a DC bus capacitor, which reduces the volume and weight of the power module and reduces maintenance Cost and improve maintenance efficiency; DC bus capacitor integrated structure integrated design reduces the ripple current of the module.
以上参照附图说明了本申请的优选实施例，并非因此局限本申请的权利范围。本领域技术人员不脱离本申请的范围和实质内所作的任何修改、等同替换和改进，均应在本申请的权利范围之内。The preferred embodiments of the present application have been described above with reference to the accompanying drawings, and thus do not limit the scope of rights of the present application. Any modification, equivalent replacement and improvement made by those skilled in the art without departing from the scope and essence of this application shall fall within the scope of the rights of this application.

Claims (10)

  1. 一种功率模组，其特征在于，所述功率模组包括3N个单相功率模块、直流母线电容集成结构；所述3N个单相功率模块和所述直流母线电容集成结构固定连接；A power module, characterized in that the power module includes 3N single-phase power modules and a DC bus capacitor integrated structure; the 3N single-phase power modules and the DC bus capacitor integrated structure are fixedly connected;
    所述单相功率模块包括功率单元、与所述功率单元连接的第一直流母排和交流母排；所述功率单元的直流端与所述第一直流母排电性连接；所述功率单元的交流端与所述交流母排电性连接；The single-phase power module includes a power unit, a first DC bus and an AC bus connected to the power unit; the DC terminal of the power unit is electrically connected to the first DC bus; The AC end of the power unit is electrically connected to the AC bus discharge;
    所述直流母线电容集成结构包括与所述3N个单相功率模块连接的电容集成组件，所述电容集成组件包括固定结构件、与各个单相功率模块对应的M个直流母线电容以及第二直流母排，所述M个直流母线电容集成于所述固定结构件中；所述第一直流母排与所述第二直流母排电性连接；其中N、M均大于或等于1。The DC bus capacitor integrated structure includes a capacitor integrated component connected to the 3N single-phase power modules. The capacitor integrated component includes a fixed structural member, M DC bus capacitors corresponding to each single-phase power module, and a second DC Busbars, the M DC bus capacitors are integrated in the fixed structural member; the first DC busbar and the second DC busbar are electrically connected; wherein N and M are both greater than or equal to 1.
  2. 根据权利要求1所述的功率模组，其特征在于，所述单相功率模块还包括换热器；The power module according to claim 1, wherein the single-phase power module further includes a heat exchanger;
    所述功率单元固定安装在所述换热器的一侧或两侧。The power unit is fixedly installed on one side or both sides of the heat exchanger.
  3. 根据权利要求2所述的功率模组，其特征在于，所述单相功率模块还包括与所述功率单元连接的驱动板；The power module according to claim 2, wherein the single-phase power module further includes a drive board connected to the power unit;
    所述驱动板安装在所述换热器上；或者，所述驱动板和所述功率单元集成在一起。The driving board is installed on the heat exchanger; or, the driving board and the power unit are integrated together.
  4. 根据权利要求1-3任一所述的功率模组，其特征在于，所述功率单元包括IGBT、IGCT、IEGT中的任一种功率器件。The power module according to any one of claims 1-3, wherein the power unit includes any one of IGBT, IGCT, and IEGT power devices.
  5. 根据权利要求1-4任一所述的功率模组，其特征在于，所述第一直流母排电性和所述第二直流母排均包括正直流母排、负直流母排以及设置于所述正直流母排和所述负直流母排之间的绝缘膜。The power module according to any one of claims 1 to 4, wherein the electrical properties of the first DC bus and the second DC bus include a positive DC bus, a negative DC bus, and settings An insulating film between the positive DC busbar and the negative DC busbar.
  6. 根据权利要求1-5任一所述的功率模组，其特征在于，所述3N个单相功率模块设置于所述直流母线电容集成结构的两侧，且每侧的单相功率模块的数量相等；其中N为2的整数倍。The power module according to any one of claims 1 to 5, wherein the 3N single-phase power modules are disposed on both sides of the DC bus capacitor integrated structure, and the number of single-phase power modules on each side Equal; where N is an integer multiple of 2.
  7. 根据权利要求6所述的功率模组，其特征在于，所述直流母线电容集成结构和两侧的单相功率模块集成为一个独立的单元，以整体地安装在电力电子设备中；或者，所述直流母线电容集成结构和两侧的单相功率模块形成三个独立的单元，以分别地安装在电力电子设备中。The power module according to claim 6, wherein the integrated structure of the DC bus capacitor and the single-phase power modules on both sides are integrated into an independent unit to be integrally installed in power electronic equipment; or The DC bus capacitor integrated structure and the single-phase power modules on both sides form three independent units to be separately installed in power electronic equipment.
  8. 根据权利要求1-5任一所述的功率模组，其特征在于，所述3N个单相功率模块均设置于所述直流母线电容集成结构的一侧。The power module according to any one of claims 1 to 5, wherein the 3N single-phase power modules are all provided on one side of the DC bus capacitor integrated structure.
  9. 一种电力电子设备，其特征在于，所述电力电子设备包括权利要求1-8任一所述的功率模组。A power electronic device, characterized in that the power electronic device comprises the power module according to any one of claims 1-8.
  10. 根据权利要求9所述的电力电子设备，其特征在于，所述电力电子设备包括光伏逆变器或者风电变流器。The power electronic device according to claim 9, wherein the power electronic device comprises a photovoltaic inverter or a wind power converter.
PCT/CN2019/120403 2018-11-28 2019-11-22 Power module and electric power electronic device WO2020108412A1 (en)

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CN209488460U (en) * 2018-11-28 2019-10-11 深圳市长昊机电有限公司 Power modules and power electronic equipment

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CN102097941A (en) * 2010-12-30 2011-06-15 冶金自动化研究设计院 Dual PWM (pulse width modulation) integrated gate commutated thyristor three-level power cabinet
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EP0949752A1 (en) * 1998-04-06 1999-10-13 Alstom Transport S.A. Capacitor bank, power electronic device comprising such a bank and power electronic assembly comprising such device
CN102097941A (en) * 2010-12-30 2011-06-15 冶金自动化研究设计院 Dual PWM (pulse width modulation) integrated gate commutated thyristor three-level power cabinet
CN102857080A (en) * 2012-09-21 2013-01-02 深圳市英威腾电气股份有限公司 Explosion-proof frequency converter core and explosion-proof frequency converter
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CN209488460U (en) * 2018-11-28 2019-10-11 深圳市长昊机电有限公司 Power modules and power electronic equipment

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