Power module and wind power converter

Abstract

The utility model discloses a power module and a wind power converter. The power module comprises a module main body, a heat radiator accommodated in the module main body, and a wind shield, a single board device, a device installation member, an AC side conductor, n power devices and an intermediate connection conducting bar which are assembled together with the module main body. The n power devices are arranged on the radiator, the n power devices are arranged in a front row and a rear row, the front row of power devices and the rear row of power devices are connected through the middle connecting conducting bar, the alternating current side electric conductor is fixedly arranged on an alternating current port of the front row of power devices to form a module alternating current interface, and the device installation part is arranged on the module main body; according to the power module, the direct current port of the power device is directly connected with the capacitor assembly without adopting a switching conducting bar, so that the module cost is reduced, the Vce voltage and the ripple current of the power module are reduced, the positioning among the capacitor direct current busbars is accurate, and the module damage risk caused by the fact that system vibration is transmitted to the power device is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of wind power, in particular to a power module and a wind power converter. Background Art

[0002] With the rapid development of industrial technology, large-scale power electronic equipment is increasingly used in various industries. The power level and power density of the electrical equipment used in the equipment are also getting higher and higher. At the same time, the internal power unit is required to have the characteristics of compact structure, easy maintenance, high power density, etc. However, conventional modules, such as the following Figure 1 As shown in the figure, due to the large size and weight of the integrated capacitor component, it is difficult for one person to maintain it. In order to make the module small and lightweight, the module component and capacitor component are separated, and the capacitor component is stripped out, thereby achieving the module size and weight goals, as shown below Figure 2 As shown, however, the split design brings about the problem of adding a DC transfer conductive busbar between the DC port of the power device and the capacitor assembly, which not only increases the module cost, but also causes the problem of increased Vce voltage of the power module due to the addition of the transfer conductive busbar. Utility Model Content

[0003] The technical problem to be solved by the utility model is to propose a power module, in which the connection between the DC port of the power device and the capacitor assembly does not use a switching conductive bus, thereby reducing the module cost, reducing the Vce voltage and ripple current of the power module, and accurately positioning the capacitor DC bus bars, thereby reducing the risk of module damage caused by the transmission of system vibration to the power device.

[0004] In order to solve the above technical problems, the utility model provides a power module, including a module body, a heat sink accommodated in the module body, a wind shield assembled with the module body, a single-board device, a device mounting member, an AC side conductor, n power devices, and an intermediate connecting conductive bar; the n power devices are arranged on the heat sink, and the n power devices are arranged in front and back rows, the front row power devices and the rear row power devices are connected through the intermediate connecting conductive bar, the AC side conductor is fixedly arranged on the AC port of the front row power device to form a module AC interface, the device mounting member is arranged on the module body, the single-board device is fixedly arranged on the device mounting member, the DC port of the rear row power device forms a module DC interface that directly uses the DC port as an interface and does not provide a switching conductor, and the wind shield covers the module DC interface according to the shape of the interface.

[0005] Preferably, the module AC interface is arranged beside the air inlet of the radiator, and the module AC interface is arranged outside the wind shield.

[0006] Preferably, the interior of the power module is in a double-layer layout, and the single-board device is arranged on the upper layer of the power device through the device mounting member.

[0007] Preferably, the module DC interface is connected to the bus interface of the bus capacitor assembly, and the module DC interface is provided with an elastic fixing member for accurately positioning the capacitor DC bus and reducing the transmission of system vibration to the power device, and the elastic fixing member is arranged between the bus interface of the bus capacitor assembly and the heat sink.

[0008] Preferably, the elastic fixing part is a long strip structure, a plurality of bosses are provided on the front part of the long strip structure, each of the bosses is provided with a mounting through hole, a plurality of positioning mounting holes are provided on the radiator, and the bus interface of the bus capacitor assembly assembles the mounting through holes with the positioning mounting holes corresponding to the radiator through fasteners.

[0009] In order to solve the above technical problem, the utility model also provides a wind power converter, including the power module mentioned above.

[0010] After adopting the above structure, the power module includes a module body, a heat sink accommodated in the module body, a wind shield assembled with the module body, a single board device, a device mounting part, an AC side conductor, n power devices, and an intermediate connecting conductive bar; the n power devices are arranged on the heat sink, and the n power devices are arranged in front and back rows, the front row power devices and the rear row power devices are connected through the intermediate connecting conductive bar, the AC side conductor is fixedly arranged on the AC port of the front row power device to form a module AC interface, the device mounting part is arranged on the module body, the single board device is fixedly arranged on the device mounting part, the DC port of the rear row power device forms a module DC interface that directly uses the DC port as an interface and does not set a switching conductor, and the wind shield covers the module DC interface according to the shape of the interface; the DC port of the power device of the power module is directly connected to the capacitor assembly without using a switching conductive bar, which reduces the module cost, reduces the Vce voltage and ripple current of the power module, and the positioning between the capacitor DC busbars is accurate, which reduces the risk of module damage caused by the transmission of system vibration to the power device. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The structure of the power module of the prior art Figure 1 ;

[0012] Figure 2 The structure of the power module of the prior art Figure 2 ;

[0013] Figure 3 The overall structure of the power module of the utility model Figure 1 ;

[0014] Figure 4 The overall structure of the power module of the utility model Figure 2 ;

[0015] Figure 5 It is a structural explosion diagram of the power module of the utility model;

[0016] Figure 6 This is an assembly structure diagram of the elastic fixing member and the DC busbar assembly used in the module DC port of the power module of the utility model.

[0017] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0018] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer and more understandable, the present application is further described in 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.

[0019] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "front", "back", "left", "right", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0020] Embodiment 1

[0021] See also Figures 3 to 5 , Figure 3 The overall structure of the power module of the utility model Figure 1 , Figure 4 The overall structure of the power module of the utility model Figure 2 , Figure 5 It is a structural explosion diagram of the power module of the utility model;

[0022] The present embodiment discloses a power module, comprising a module body 13, a heat sink 19 accommodated in the module body 13, a wind shield 11 assembled with the module body 13, a single board device 21, a device mounting member 22, an AC side conductor 12, n power devices, and an intermediate connecting conductive bar 15; the n power devices are arranged on the heat sink 19, and the n power devices are arranged in front and back rows, the front row power devices 18 are connected to the rear row power devices 16 through the intermediate connecting conductive bar 15, the AC side conductor 12 is fixedly arranged on the AC port 14 of the front row power devices 18 to form a module AC interface, the device mounting member 22 is arranged on the module body 13, the single board device 21 is fixedly arranged on the device mounting member 22, the DC port 17 of the rear row power devices 16 forms a module DC interface that directly uses the DC port 17 as an interface and does not set a switching conductor, and the wind shield 11 covers the module DC interface according to the shape of the interface.

[0023] Embodiment 2

[0024] This embodiment is based on the first embodiment. In this embodiment, the module AC interface is arranged beside the air inlet of the radiator 19 , and the module AC interface is arranged outside the wind shield 11 .

[0025] In this embodiment, the interior of the power module is in a double-layer layout, and the single-board device 21 is arranged on the upper layer of the power devices 18 and 16 through the device mounting member 22 .

[0026] Embodiment 3

[0027] See also Figure 6 , Figure 6 It is an assembly structure diagram of the elastic fixing member and the DC busbar assembly used in the module DC port of the power module of the utility model;

[0028] This embodiment is based on the first embodiment. In this embodiment, the module DC interface is connected to the bus interface 24 of the bus capacitor assembly 20. The module DC interface is provided with an elastic fixing member 23 for accurately positioning the capacitor DC bus and reducing the transmission of system vibration to the power devices 18 and 16. The elastic fixing member 23 is provided between the bus interface 24 of the bus capacitor assembly 20 and the heat sink 19.

[0029] In this embodiment, the elastic fixing member 22 is a long strip structure, and a plurality of bosses are opened on the front part of the long strip structure, each of the bosses is provided with a mounting through hole, and a plurality of positioning mounting holes are opened on the heat sink 19. The bus interface 24 of the busbar capacitor assembly 20 is assembled together with the positioning mounting holes corresponding to the heat sink 19 through fasteners.

[0030] Embodiment 4

[0031] This embodiment discloses a wind power converter, which includes the power module described in any one of Embodiments 1 to 3.

[0032] The power module's power device DC port and capacitor assembly are directly connected without using a transfer conductive bus, which reduces the module cost, the power module Vce voltage and ripple current. The capacitor DC busbars are accurately positioned, reducing the risk of module damage caused by system vibration transmitted to the power device.

[0033] The preferred embodiments of the present application are described above with reference to the accompanying drawings, but the scope of the present application is not limited thereby. Any modification, equivalent substitution and improvement made by a person skilled in the art without departing from the scope and essence of the present application shall be within the scope of the present application.

Claims

1. A power module, characterized in that: It includes a module body, a heat sink accommodated in the module body, a windshield assembled with the module body, a single-board device, a device mounting part, an AC side conductor, n power devices, and an intermediate connecting conductive bar; N power devices are arranged on the radiator, and the n power devices are arranged in front and back rows. The front row power devices are connected to the rear row power devices through an intermediate connecting conductive bar. The AC side conductor is fixedly arranged on the AC port of the front row power device to form a module AC interface. The device mounting part is arranged on the module body. The single-board device is fixedly arranged on the device mounting part. The DC port of the rear row power device forms a module DC interface that directly uses the DC port as the interface and does not set a switching conductor. The wind shield covers the module DC interface according to the shape of the interface.

2. The power module according to claim 1, characterized in that: The module AC interface is arranged beside the air inlet of the radiator, and the module AC interface is arranged outside the wind shield.

3. The power module according to claim 1, characterized in that: The interior of the power module is in a double-layer layout, and the single-board device is arranged on the upper layer of the power device through the device mounting member.

4. The power module according to claim 1, characterized in that: The module DC interface is connected to the bus interface of the bus capacitor assembly. The module DC interface is provided with an elastic fixing member for accurately positioning the capacitor DC bus and reducing the transmission of system vibration to the power device. The elastic fixing member is arranged between the bus interface of the bus capacitor assembly and the radiator.

5. The power module according to claim 4, characterized in that: The elastic fixing piece is a long strip structure, and a plurality of bosses are provided on the front part of the long strip structure, each of the bosses is provided with a mounting through hole, and a plurality of positioning mounting holes are provided on the radiator. The busbar interface of the busbar capacitor assembly assembles the mounting through holes with the positioning mounting holes corresponding to the radiator through fasteners.

6. A wind power converter, characterized in that: The wind power converter comprises the power module according to any one of claims 1 to 5.

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