CN219555250U

CN219555250U - Printed circuit board, inverter and motor system

Info

Publication number: CN219555250U
Application number: CN202320159351.1U
Authority: CN
Inventors: 徐青; 康江龙
Original assignee: Vitesco Technologies Holding China Co Ltd
Current assignee: Vitesco Technologies Holding China Co Ltd
Priority date: 2023-01-18
Filing date: 2023-01-18
Publication date: 2023-08-18
Anticipated expiration: 2033-01-18

Abstract

The utility model discloses a printed circuit board, which comprises a bridge connection structure, wherein the bridge connection structure comprises: at least one bridge arranged at intervals along the circumferential direction of the printed circuit board; one end of the lead is connected with the motor, and the other end of the lead is fixedly connected with at least one bridge; at least one through hole group is arranged on the printed circuit board, and the through hole group comprises a plurality of through holes extending along the thickness direction of the printed circuit board; the bridge comprises a plurality of pins extending along the thickness direction, a plurality of through holes correspond to the pins, and one ends of the pins are inserted into the through holes along the thickness direction so as to fixedly connect the bridge with the printed circuit board. The utility model can reduce the cost, has compact and stable structure and occupies small area of the circuit board. The utility model also provides an inverter and a motor system.

Description

Printed circuit board, inverter and motor system

Technical Field

The present utility model relates to the field of electrical interconnection technology, and in particular, to a printed circuit board, an inverter, and a motor system.

Background

In the technical field of hybrid power, 48V BSG (Belt Starter Generator) has the functions of replacing the original generator, realizing the function of generating electricity, assisting in the running process of an automobile and reducing emission and saving oil. The 48V BSG (Belt Starter Generator) is mainly divided into two parts, namely a motor and an inverter, which are connected through a bridge. However, the conventional plastic-coated metal bridge process has the problems of expensive injection mold, poor heat dissipation performance and large occupied area of a PCB (printed circuit board).

Disclosure of Invention

The utility model aims to solve the problems of complex bridge structure, high production cost and large occupied area of a printed circuit board. The utility model provides a printed circuit board, an inverter and a motor system, which can reduce cost, have compact and stable structure and occupy small area of the circuit board.

To solve the above technical problems, an embodiment of the present utility model discloses a printed circuit board, including a bridge connection structure, the bridge connection structure includes: at least one bridge arranged at intervals along the circumferential direction of the printed circuit board; one end of the lead is connected with the motor, and the other end of the lead is fixedly connected with the at least one bridge; wherein, at least one through hole group is arranged on the printed circuit board, and the through hole group comprises a plurality of through holes extending along the thickness direction of the printed circuit board; the bridge comprises a plurality of pins extending along the thickness direction, the through holes correspond to the pins, and one ends of the pins are inserted into the through holes along the thickness direction so that the bridge is fixedly connected with the printed circuit board.

By adopting the technical scheme, the bridge is connected with the printed circuit board through wave soldering, and then is subjected to resistance welding with the lead wire of the motor. The through hole group arranged on the printed circuit board can play a role of a positioning mechanism between the bridge and the printed circuit board, so that the bridge can be assembled with the printed circuit board more accurately. The bridge with the structure is stably installed on the printed circuit board, has compact structure, uses less raw materials, and occupies relatively less area of the circuit board. In addition, the bridge with the structure has relatively small influence of vibration and the like after being welded with the motor lead

According to another embodiment of the present utility model, the printed circuit board is disclosed, wherein the bridge includes a first connection portion, the other end of the pin is fixedly connected to the first connection portion, the first connection portion extends along a first direction, and the first direction intersects the thickness direction.

According to another embodiment of the present utility model, a printed circuit board is disclosed, and the bridge further includes a second connection portion extending in a radial direction of the printed circuit board, one end of the second connection portion is fixedly connected to the first connection portion, and the other end is fixedly connected to the lead.

According to another embodiment of the present utility model, a printed circuit board is disclosed, wherein the first direction intersects the radial direction, and an included angle α between an extending direction of the second connection portion and an extending direction of the first connection portion is an obtuse angle.

According to another embodiment of the utility model, a printed circuit board is disclosed, the bridge and the printed circuit board being fixedly connected by wave soldering.

According to another embodiment of the present utility model, a printed circuit board is disclosed, the bridge and the leads being fixedly connected by resistance welding.

According to another embodiment of the utility model, the at least one bridge comprises six bridges, the six bridges are symmetrically arranged relative to the longitudinal central axis of the printed circuit board, and the bridges positioned on two sides of the longitudinal central axis are symmetrical pieces.

According to another embodiment of the present utility model, the printed circuit board is disclosed, wherein the at least one through hole group comprises six through hole groups, the six through hole groups are symmetrically arranged relative to a longitudinal central axis of the printed circuit board, and the through hole groups positioned at two sides of the longitudinal central axis are symmetrical pieces.

The embodiment of the utility model also discloses an inverter comprising the printed circuit board.

The embodiment of the utility model also discloses a motor system which comprises the inverter and a motor; wherein the motor and the inverter are electrically connected through the printed circuit board.

Drawings

Fig. 1 shows a perspective view of a printed circuit board according to an embodiment of the present utility model.

Fig. 2 (a) and (b) show bottom views of a printed circuit board according to an embodiment of the present utility model; fig. 2 (b) is a partial enlarged view of region C in fig. 2 (a).

Fig. 3 (a), (b), (c) and (d) show front, side, rear and top views, respectively, of a bridge of a printed circuit board according to an embodiment of the present utility model.

Detailed Description

Further advantages and effects of the present utility model will become apparent to those skilled in the art from the disclosure of the present specification, by describing the embodiments of the present utility model with specific examples. While the description of the utility model will be described in connection with the preferred embodiments, it is not intended to limit the inventive features to the implementation. Rather, the purpose of the utility model described in connection with the embodiments is to cover other alternatives or modifications, which may be extended by the claims based on the utility model. The following description contains many specific details for the purpose of providing a thorough understanding of the present utility model. The utility model may be practiced without these specific details. Furthermore, some specific details are omitted from the description in order to avoid obscuring the utility model. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

It should be noted that in this specification, like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present embodiment, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", "inner", "bottom", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship in which the inventive product is conventionally put in use, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the present utility model.

The terms "first," "second," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.

In the description of the present embodiment, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present embodiment can be understood in a specific case by those of ordinary skill in the art.

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings.

Referring to fig. 1, the present utility model provides a printed circuit board 10 including a bridge connection structure including: bridge 20 and leads (not shown). The printed circuit board 10 is fixedly arranged on the inverter and is electrically connected with the inverter. At least one bridge 20 is provided at intervals in the circumferential direction (as shown in the direction B in fig. 1) of the printed circuit board 10. Illustratively, the bridge 20 is connected to the printed circuit board 10 by wave soldering. One end of the lead wire is connected to the motor and the other end is fixedly connected to at least one bridge 20 to electrically connect the motor and the inverter. The leads and bridge 20 are illustratively connected by resistance welding.

Referring to fig. 2 (a) and (b) in combination with fig. 3 (b), at least one through hole group 11 is provided on the printed circuit board 10. The via group 11 includes a plurality of vias 111 extending in the thickness direction of the printed circuit board (as shown in the X direction in fig. 3). The bridge 20 includes a plurality of pins 21 extending in a thickness direction (shown in an X direction in fig. 3), a plurality of through holes 111 corresponding to the plurality of pins 21, and one ends 211 of the pins inserted into the through holes 111 in the thickness direction (shown in the X direction in fig. 3) to fixedly connect the bridge 20 with the printed circuit board 10. Illustratively, referring to fig. 1, the plurality of pins 21 of any one bridge 20 are in one-to-one correspondence with the plurality of through holes 111 of the corresponding through hole group 11, and the pins 21 are clearance-fitted with the through holes 111 in the thickness direction and fixedly connected by wave soldering.

In summary, the present utility model electrically connects the motor and the inverter by fixing a printed circuit board disposed on the inverter. The bridge 20 is connected to the printed circuit board 10 by wave soldering and then resistance soldered to the leads of the motor. The through hole group 11 arranged on the printed circuit board 10 can serve as a positioning mechanism between the bridge 20 and the printed circuit board 10, so that the bridge 20 can be assembled with the printed circuit board 10 more accurately.

In some possible embodiments, referring to fig. 3 (b) and (d), the bridge 20 includes a first connection 22. Fig. 3 (b) shows that the other end 212 of the pin 21 is fixedly connected to the first connecting portion 22. As shown in fig. 3 (d), the first connection portion 22 extends in a first direction (as shown in the Y direction in fig. 3) intersecting the thickness direction (as shown in the X direction in fig. 3). Illustratively, the first direction is perpendicular to the thickness direction of the printed circuit board 10, and the first direction is parallel to the extending direction of the printed circuit board 10.

In some possible embodiments, with continued reference to fig. 3 (a) and (D) in combination with fig. 2 (a), the bridge 20 further includes a second connection 23 extending in a radial direction of the printed circuit board (as shown in the direction D in fig. 2). One end 231 of the second connecting portion is fixedly connected with the first connecting portion 22, and the other end 232 is fixedly connected with the lead. Illustratively, referring to fig. 3 (D), the first direction (as shown in the Y direction in fig. 3) intersects the radial direction (as shown in the D direction in fig. 3), and the second connection portion 23 forms an obtuse angle α with the first connection portion 22, for example, 120 degrees to 150 degrees, matching the curvature of the circumferential edge of the printed circuit board 10. The bridge 20 of this construction is very stable to mount to the printed circuit board 10 and is compact, uses less raw material, and occupies relatively little area of the printed circuit board.

In some possible embodiments, referring to fig. 1, at least one bridge 20 comprises six bridges 20 and at least one via group 11 comprises six via groups 11. Illustratively, referring to fig. 2 (a), six through-hole groups 11 are symmetrically disposed with respect to a longitudinal center axis (as shown in a direction a of fig. 2) of the printed circuit board 10, and six corresponding bridges 20 are fixedly connected to the printed circuit board 10 in a circumferential direction (as shown in a direction B of fig. 2) by wave soldering, respectively.

In some possible embodiments, an inverter and motor system is also provided, including a printed circuit board, an inverter, and a motor, which may be a BSG motor. The motor system comprises a motor and an inverter, which are electrically connected through a bridge. The bridge is connected with the printed circuit board through wave soldering, and then is subjected to resistance soldering with the lead wires of the motor.

In some possible embodiments, the bridge is made of metal, illustratively copper, and is formed using a stamping process. The stamping process has high production efficiency and low cost. Compared with the traditional technology of wrapping the metal bridge by plastic, the method omits a complex and expensive injection mold and saves materials. And moreover, the metal bridge is not wrapped by plastic, so that heat exchange with air is easier, and the heat dissipation effect is better.

It should be noted that, illustratively, referring to fig. 2 (b), the plurality of through holes 111 in the through hole group 11 are arranged in a plurality of rows of through holes at intervals along the radial direction of the printed circuit board 10 (as shown in the direction D in fig. 2), and each row of the plurality of through holes 111 is arranged at intervals to match with the plurality of pins 21 on the corresponding bridge 20.

Further, both sides of the longitudinal center axis (as shown in the direction a of fig. 1) of the printed circuit board 10 may be divided into three bridges 201, 202, 203 on the left side and three bridges 204, 205, 206 on the right side. Wherein the left and right bridges 20 are symmetrical members. Specifically, bridge 201 and bridge 204, bridge 202 and bridge 205, and bridge 203 and bridge 206 are symmetrical in pairs about the longitudinal center axis. This symmetrical structure does not cause an increase in cost, and foolproof can be achieved by the structure of the bridge 20 itself and the through-holes 111 on the printed circuit board 10. And the bridge 20 of this structure is relatively less affected by vibration or the like after being soldered to the motor leads.

While the utility model has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a further detailed description of the utility model with reference to specific embodiments, and it is not intended to limit the practice of the utility model to those descriptions. Various changes in form and detail may be made therein by those skilled in the art, including a few simple inferences or alternatives, without departing from the spirit and scope of the present utility model.

Claims

1. A printed circuit board comprising a bridge connection structure, the bridge connection structure comprising:

at least one bridge arranged at intervals along the circumferential direction of the printed circuit board;

one end of the lead is connected with the motor, and the other end of the lead is fixedly connected with the at least one bridge; wherein,,

at least one through hole group is arranged on the printed circuit board, and the through hole group comprises a plurality of through holes extending along the thickness direction of the printed circuit board;

the bridge comprises a plurality of pins extending along the thickness direction, the through holes correspond to the pins, and one ends of the pins are inserted into the through holes along the thickness direction so that the bridge is fixedly connected with the printed circuit board.

2. The printed circuit board of claim 1, wherein the bridge includes a first connection portion, the other end of the pin is fixedly connected to the first connection portion, the first connection portion extends in a first direction, and the first direction intersects the thickness direction.

3. The printed circuit board of claim 2, wherein the bridge further comprises a second connection portion extending in a radial direction of the printed circuit board, one end of the second connection portion being fixedly connected to the first connection portion, and the other end being fixedly connected to the lead.

4. A printed circuit board according to claim 3, wherein the first direction intersects the radial direction, and the angle α between the extending direction of the second connection portion and the extending direction of the first connection portion is an obtuse angle.

5. The printed circuit board of any of claims 1-4, wherein the bridge and the printed circuit board are fixedly connected by wave soldering.

6. The printed circuit board of any of claims 1 to 4, wherein the bridge and the leads are fixedly connected by resistance welding.

7. The printed circuit board of any of claims 1 to 4, wherein said at least one bridge comprises six of said bridges, said six bridges being symmetrically disposed about a longitudinal central axis of said printed circuit board, said bridges being symmetrical with respect to each other on opposite sides of said longitudinal central axis.

8. The printed circuit board of any one of claims 1 to 4, wherein the at least one through hole group comprises six through hole groups, the six through hole groups being symmetrically disposed with respect to a longitudinal center axis of the printed circuit board, the through hole groups located on both sides of the longitudinal center axis being symmetrical pieces with each other.

9. An inverter comprising the printed circuit board of any one of claims 1 to 8.

10. An electric motor system comprising the inverter and the electric motor according to claim 9; wherein the motor and the inverter are electrically connected through the printed circuit board.