Integrated planar current sensor integrated plastic package power module

Abstract

The utility model relates to the technical field of plastic package power modules, and discloses an integrated plastic package power module integrating a planar current sensor, which comprises a power module main body, an AC terminal assembly and the planar current sensor fixedly arranged on the AC terminal assembly. The power module main body is internally provided with an integrated cavity used for accommodating a plane current sensor, the AC terminal assembly is fixedly arranged on the power module main body, the AC terminal assembly is composed of an insulating substrate and an AC terminal, the insulating substrate is fixedly arranged on the AC terminal, the insulating substrate is located in the power module main body, and the AC terminal is fixedly arranged on the insulating substrate. According to the utility model, the planar current sensor and the power module main body form an integrated structure, thereby effectively reducing the separation calibration difficulty of the power module and the current sensor, facilitating the reduction of the size, and being capable of improving the power density.

Description

Technical Field

[0001] This utility model relates to the field of encapsulated power module technology, and more specifically, to an integrated encapsulated power module with an integrated planar current sensor. Background Technology

[0002] A plastic-encapsulated power module is a powerful integrated circuit module that can be used to control and drive high-power electronic devices, such as AC motor drivers, frequency converters, and inverters. It is a highly integrated semiconductor device that typically includes multiple functional modules such as power switches, drive circuits, protection circuits, and control circuits.

[0003] Currently, the power module and the current sensor are two independent components. Traditional current sensors are mainly based on magnetic cores, and the current intensity is tested by sensing the magnetic core. The separation and calibration of the power module and the current sensor are difficult and result in a large size, which leads to a reduction in power density. Based on this, this utility model designs an integrated planar current sensor in a plastic-encapsulated power module to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide an integrated planar current sensor in a molded power module to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An integrated plastic-encapsulated power module with an integrated planar current sensor includes a power module body, an AC terminal assembly, and a planar current sensor. The planar current sensor is fixedly mounted on the AC terminal assembly. An integrated cavity for accommodating the planar current sensor is formed inside the power module body. The AC terminal assembly is fixedly mounted on the power module body and consists of an insulating substrate and AC terminals. The insulating substrate is fixedly mounted on the AC terminals and is located inside the power module body. The end of the AC terminal extends outward through the front side of the power module body. A DC terminal assembly is fixedly mounted on the rear side of the power module body.

[0007] As a preferred embodiment of this utility model, the DC terminal assembly consists of a DC positive terminal and a DC negative terminal, which are located at opposite ends of the rear side.

[0008] As a preferred embodiment of this invention, the planar current sensor is located on the upper surface of the AC terminal.

[0009] As a preferred embodiment of the present invention, an extension is fixedly provided at one end of the insulating substrate, the extension is located inside the power module body, and the planar current sensor is located on the upper surface of the extension.

[0010] As a preferred embodiment of this utility model, the upper surface of the AC terminal is provided with an embedded groove, and the planar current sensor is located in the embedded groove.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] This invention integrates a planar current sensor onto an AC terminal assembly. An integrated cavity is created inside the power module body. The AC terminal assembly, consisting of an insulating substrate and AC terminals, is located within the power module body. The ends of the AC terminals extend outwards through the front of the power module body. By integrating the planar current sensor within the power module body, the planar current sensor and the AC terminal assembly can be integrated into the power module body, forming a unified structure. This effectively reduces the difficulty of separating and calibrating the power module and the current sensor, reduces volume, and increases power density. Attached Figure Description

[0013] Figure 1 This is a cross-sectional structural diagram of Embodiment 1 of the present utility model;

[0014] Figure 2 This is a three-dimensional structural diagram of the AC terminal assembly and the planar current sensor in Embodiment 1 of this utility model;

[0015] Figure 3 This is a three-dimensional structural diagram of Embodiment 1 of the present utility model;

[0016] Figure 4 This is a cross-sectional view of Embodiment 2 of the present invention;

[0017] Figure 5 This is a three-dimensional structural diagram of the AC terminal assembly and the planar current sensor in Embodiment 2 of this utility model;

[0018] Figure 6 This is a cross-sectional structural diagram of Embodiment 3 of the present invention;

[0019] Figure 7 This is a three-dimensional structural diagram of the AC terminal assembly and the planar current sensor in Embodiment 3 of this utility model.

[0020] In the figure: 1. Power module body; 101. Integrated cavity; 2. AC terminal assembly; 201. Insulating substrate; 202. AC terminal; 203. Extension; 204. Embedded groove; 3. Planar current sensor; 4. DC terminal assembly; 401. DC positive terminal; 402. DC negative terminal. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0022] like Figures 1 to 3 As shown, this utility model provides an integrated plastic-encapsulated power module with an integrated planar current sensor, including a power module body 1, an AC terminal assembly 2, and a planar current sensor 3. The planar current sensor 3 is fixedly mounted on the AC terminal assembly 2. An integrated cavity 101 is formed inside the power module body 1. The AC terminal assembly 2 is fixedly mounted on the power module body 1 and consists of an insulating substrate 201 and an AC terminal 202. The insulating substrate 201 is fixedly mounted on the AC terminal 202 and is located inside the power module body 1. The end of the AC terminal 202 extends outward through the front side of the power module body 1. A DC terminal assembly 4 is fixedly mounted on the rear side of the power module body 1. The planar current sensor 3 is accommodated in the integrated cavity 101 inside the power module body 1, and the planar current sensor 3 and the AC terminal assembly 2 can be integrated on the power module body 1, so that the planar current sensor 3 and the power module body 1 form an integrated structure.

[0023] Among them, such as Figure 3 As shown, the DC terminal assembly 4 consists of a DC positive terminal 401 and a DC negative terminal 402, with the DC positive terminal 401 and the DC negative terminal 402 located at the two ends of the rear side, respectively.

[0024] Among them, such as Figure 2 As shown, the planar current sensor 3 is located on the upper surface of the AC terminal 202. Example

[0025] like Figure 4 and Figure 5As shown, this utility model provides an integrated plastic-encapsulated power module with an integrated planar current sensor. The difference from Embodiment 1 is that an extension 203 is fixedly provided at one end of the insulating substrate 201. The extension 203 is located inside the power module body 1, and the planar current sensor 3 is located on the upper surface of the extension 203, so that the planar current sensor 3 is below the AC terminal 202. Example

[0026] like Figure 6 and Figure 7 As shown, this utility model provides an integrated plastic-encapsulated power module with an integrated planar current sensor. The difference from Embodiments 1 and 2 is that an embedded groove 204 is provided on the upper surface of the AC terminal 202, and the planar current sensor 3 is located in the embedded groove 204, so that the planar current sensor 3 is hidden and arranged, which helps to save the space required by the planar current sensor 3.

[0027] In summary, by placing the planar current sensor 3 on the AC terminal assembly 2, and opening an integrated cavity 101 inside the power module body 1, the AC terminal assembly 2 is placed on the power module body 1. The AC terminal assembly 2 consists of an insulating substrate 201 and an AC terminal 202. The insulating substrate 201 is placed on the AC terminal 202 and is located inside the power module body 1. The end of the AC terminal 202 extends outward through the front side of the power module body 1. The integrated cavity 101 inside the power module body 1 accommodates the planar current sensor 3, which integrates the planar current sensor 3 and the AC terminal assembly 2 onto the power module body 1, forming an integrated structure. This effectively reduces the difficulty of separating and calibrating the power module and the current sensor, and also helps to reduce the volume and improve the power density.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An integrated planar current sensor in a molded power module, characterized in that: It includes a power module body (1), an AC terminal assembly (2), and a planar current sensor (3). The planar current sensor (3) is fixedly mounted on the AC terminal assembly (2), and the power module body (1) has an integrated cavity (101) for accommodating the planar current sensor (3) inside. The AC terminal assembly (2) is fixedly mounted on the power module body (1). The AC terminal assembly (2) consists of an insulating substrate (201) and an AC terminal (202). The insulating substrate (201) is fixedly disposed on the AC terminal (202). The insulating substrate (201) is located inside the power module body (1). The end of the AC terminal (202) extends outward through the front part of the power module body (1). The rear part of the power module body (1) is fixedly disposed with a DC terminal assembly (4).

2. The integrated planar current sensor encapsulated power module according to claim 1, characterized in that: The DC terminal assembly (4) consists of a DC positive terminal (401) and a DC negative terminal (402), with the DC positive terminal (401) and the DC negative terminal (402) located at the two ends of the rear side, respectively.

3. The integrated planar current sensor encapsulated power module according to claim 2, characterized in that: The planar current sensor (3) is located on the upper surface of the AC terminal (202).

4. The integrated planar current sensor encapsulated power module according to claim 2, characterized in that: An extension (203) is fixedly provided at one end of the insulating substrate (201). The extension (203) is located inside the power module body (1), and the planar current sensor (3) is located on the upper surface of the extension (203).

5. The integrated planar current sensor encapsulated power module according to claim 2, characterized in that: The upper surface of the AC terminal (202) is provided with an embedded groove (204), and the planar current sensor (3) is located in the embedded groove (204).

Images