CN114938612A - A heat dissipation structure and drive assembly of a motor controller power module - Google Patents

Abstract

The invention discloses a heat dissipation structure and a drive assembly of a power module of a motor controller. The heat dissipation structure includes a power module and a heat dissipation shell; a heat dissipation channel is formed between the power module and the heat dissipation shell, and a heat dissipation protrusion is provided on the end face of the power module, and the heat dissipation shell is provided with a heat dissipation protrusion corresponding to the heat dissipation protrusion The groove is arranged in a gap between the top of the heat dissipation protrusion and the groove bottom and the groove wall of the heat dissipation groove. The heat dissipation structure has the advantages of simple structure, good heat dissipation performance and low manufacturing cost.

Description

A heat dissipation structure and drive assembly of a motor controller power module

technical field

The invention belongs to the technical field of motor controllers, and particularly relates to a heat dissipation structure and a drive assembly of a power module of a motor controller.

Background technique

The motor controller is an integrated circuit that controls the motor to work according to the set direction, speed, angle and response time by actively working. The motor controller inevitably generates heat during the working process. When the temperature of the motor controller is too high , will seriously affect the performance of the motor controller.

The power module of the existing motor controller adopts the water channel structure to realize the cooling and cooling of the power module, that is, a cooling water channel is arranged between the power module and the water channel shell, and in order to increase the contact area between the power module and the cooling liquid in the cooling water channel, and improve the heat dissipation performance , the end face of the power module in contact with the cooling liquid is provided with a heat dissipation pin structure. When the cooling liquid flows between the cooling pin structures, there is a certain water resistance. When there is a gap between the cooling pin tip and the water channel shell, a large amount of cooling liquid will flow through the gap, resulting in the flow between the cooling pin structures. The flow rate of the cooling liquid is reduced, thereby weakening the heat dissipation effect of the power module. Therefore, the tip of the cooling pin contacts with the water channel shell during installation, thereby eliminating the existence of gaps. However, the end surface of the water channel shell in contact with the cooling pin structure needs to be very flat, which increases the processing difficulty of the cooling water channel and increases the manufacturing cost.

SUMMARY OF THE INVENTION

In view of the above problems, the present invention discloses a heat dissipation structure and a driving assembly for a power module of a motor controller, so as to overcome the above problems or at least partially solve the above problems.

In order to achieve the above object, the present invention adopts the following technical solutions:

One aspect of the present invention provides a heat dissipation structure for a power module of a motor controller, the heat dissipation structure includes a power module and a heat dissipation housing;

A heat dissipation channel is formed between the power module and the heat dissipation housing, and a heat dissipation protrusion is provided on the end surface of the power module, and a heat dissipation groove corresponding to the heat dissipation protrusion is provided on the heat dissipation case. A gap is provided between the top of the heat dissipation protrusion and the groove bottom and the groove wall of the heat dissipation groove.

Further, the size of the notch of the heat dissipation groove is larger than the size of the bottom of the groove.

Further, the top end of the heat dissipation protrusion is inserted into the heat dissipation groove.

Further, the cross-sectional shape of the top end of the heat dissipation protrusion is consistent with the cross-sectional shape of the heat dissipation groove.

Further, the distances from the top end of the heat dissipation protrusion to each groove wall of the heat dissipation groove are the same.

Further, the distance from the top end of the heat dissipation protrusion to the groove wall of the heat dissipation groove is 0.2 to 1.4 times the diameter of the top end of the heat dissipation protrusion.

Further, the distance between the top end of the heat dissipation protrusion and the groove wall and the groove bottom of the heat dissipation groove is the same.

Further, the groove bottom and the groove wall of the heat dissipation groove are arc-shaped.

Further, the top end of the heat dissipation protrusion is conical or arc-shaped.

Another aspect of the present invention provides a drive assembly, the drive assembly includes a motor and a motor controller, and the motor controller adopts the heat dissipation structure described in any one of the above to cool a power module of the motor controller.

The advantages and beneficial effects of the present invention are:

In the heat dissipation structure of the present invention, by setting the heat dissipation groove corresponding to the heat dissipation protrusion on the heat dissipation shell, and setting the gap between the top of the heat dissipation protrusion and the groove bottom and the groove wall of the heat dissipation groove, the surface of the heat dissipation case is The processing does not need to be refined, which reduces the processing difficulty of the heat dissipation structure and reduces the manufacturing cost; in addition, the top of the heat dissipation protrusion can be cooled, and when the cooling liquid passes through the heat dissipation groove, turbulent flow will be generated, which can effectively strengthen the heat dissipation structure. cooling capacity.

Description of drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are for the purpose of illustrating preferred embodiments only and are not to be considered limiting of the invention. Also, the same components are denoted by the same reference numerals throughout the drawings. In the attached image:

FIG. 1 is a partial cross-sectional view of the heat dissipation structure in Embodiment 1 of the present invention.

In the figure: 1. Power module; 2. Cooling shell; 3. Cooling protrusion; 4. Cooling groove.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The technical solutions provided by the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Example 1

An embodiment of the present invention provides a heat dissipation structure for a power module of a motor controller. As shown in FIG. 1 , the heat dissipation structure includes a power module 1 and a heat dissipation housing 2 .

Specifically, a heat dissipation water channel is formed between the power module 1 and the heat dissipation housing 2 . When the cooling liquid flows through the heat dissipation water channel, the cooling of the power module 1 can be achieved. The two ends of the heat dissipation shell 2 are respectively provided with a liquid inlet and a liquid outlet (not shown in the figure). Coolant is supplied in medium circulation. In addition, a plurality of heat dissipation protrusions 3 are provided on the end surface of the power module 1. The heat dissipation protrusions 3 may be arranged in an orderly or disorderly arrangement. The disposition of the heat dissipation protrusions 3 can increase the power module 1 and the heat dissipation water channel. The contact area of the inner cooling liquid is increased, thereby improving the cooling effect of the power module 1 . In addition, the heat dissipation shell 2 is provided with heat dissipation grooves 4 corresponding to the number and position of the heat dissipation protrusions 3, and the top of the heat dissipation protrusions 3 is provided with a gap between the groove bottom and the groove wall of the heat dissipation groove 4. At this time, the heat dissipation case 2. The surface processing does not need to be fine, the tolerance requirements are low, the processing difficulty of the heat dissipation structure is reduced, and the manufacturing cost is reduced; in addition, the cooling of the top of the heat dissipation protrusion 3 can also be achieved, and when the cooling liquid passes through the heat dissipation groove, turbulent flow will be generated , which can effectively enhance the heat dissipation capacity of the heat dissipation structure, and at the same time reduce the water resistance of the cooling liquid when it flows in the heat dissipation water channel, and reduce the requirements on the cooling liquid pressure and the cooling liquid temperature of the external cooling system.

In this embodiment, the size of the notch of the cooling groove is larger than the size of the groove bottom, so that the cooling liquid can smoothly flow into the cooling groove from between the cooling protrusions, reducing the water resistance when the cooling liquid flows in the cooling water channel.

Further, the top of the heat dissipation protrusion is inserted into the heat dissipation groove, that is, the height of the top of the heat dissipation protrusion is lower than the height of the notch of the heat dissipation groove, so that when the cooling liquid flows out of the heat dissipation groove, a vertical flow occurs, and the vertical direction When the flowing cooling liquid meets the cooling liquid flowing in the horizontal direction between the radiating protrusions, a strong turbulent flow will be generated, so that the cooling liquid in the vertical direction can achieve convection, which is convenient for the cooling liquid to flow along the height direction of the cooling protrusions to form heat exchange. , to eliminate the local high temperature of the cooling liquid at the tail end of the heat dissipation protrusion, so that the temperature of the cooling liquid in the vertical direction is basically the same, which is convenient for better cooling of the power module. Of course, in other embodiments, the top of the heat dissipation protrusion can also be flush with the notch of the heat dissipation groove, which is also within the protection scope of the present invention.

In addition, in this embodiment, the cross-sectional shape of the top of the heat-dissipating protrusion is the same as that of the heat-dissipating groove, and the distance from the top of the heat-dissipating protrusion to each groove wall of the heat-dissipating groove is the same, which facilitates the inflow of the cooling liquid into the heat-dissipating groove. And the coolant flows out from the coolant tank to reduce the water resistance of the coolant when it flows.

In this embodiment, the distance from the top of the heat dissipation protrusion to the groove wall of the heat dissipation groove is 0.2 to 1.4 times the diameter of the top of the heat dissipation protrusion, so that not only most of the cooling liquid still flows between the heat dissipation protrusions, but also The cooling and cooling of the end of the heat dissipation protrusion can also be effectively achieved.

In addition, the distance between the top of the heat dissipation protrusion and the groove wall and groove bottom of the heat dissipation groove is the same, so that the pressure of the cooling liquid in the heat dissipation groove is basically the same, thereby reducing the water resistance of the cooling liquid flowing through the heat dissipation groove.

Further, the groove bottom and the groove wall of the heat dissipation groove are arc-shaped, so that the cooling liquid can smoothly flow through the heat dissipation groove, so as not to generate turbulent flow in the heat dissipation groove. At the same time, a smooth transition is formed between the groove bottom and the groove wall of the cooling groove, which can greatly reduce the water resistance.

In this embodiment, the tops of the heat dissipation protrusions are conical or arc-shaped, so that the flow guidance of the cooling liquid can be realized, and it is convenient for the cooling liquid to flow into the heat dissipation grooves from between the heat dissipation protrusions.

Further, the heat dissipation protrusion is a heat dissipation pin, the cross-sectional shape of the heat dissipation groove is a circle, and the gap between the tip of the heat dissipation pin and the groove bottom of the heat dissipation groove is 0.1mm-1mm, and the heat dissipation structure at this time has excellent heat dissipation performance. , and the resulting water resistance is small.

In this embodiment, the power module and the heat dissipation shell are fixedly connected by screws or bolts, and a sealing ring is provided between the power module and the heat dissipation shell, which can effectively prevent the cooling liquid from flowing out of the heat dissipation water channel in the cooling structure.

Example 2

The difference from Embodiment 1 is that in this embodiment, a heat dissipation channel is formed between the heat dissipation groove and the heat dissipation protrusion. The flow channel inlet and the flow channel outlet are formed between the protrusion and the two opposite groove walls of the heat dissipation groove, and the setting direction of the flow channel inlet and the flow channel outlet is consistent with the direction of the horizontal flow of the cooling liquid between the heat dissipation protrusions, so that the cooling liquid When flowing between the radiating protrusions, it can enter into the radiating runner through the inlet of the runner, and then flow out from the outlet of the runner. The size of the outlet of the flow channel is not smaller than the size of the inlet of the flow channel, thereby reducing the water resistance of the cooling liquid when the cooling liquid flows in the cooling flow channel.

Example 3

In this embodiment, a drive assembly is provided, and the drive assembly includes a motor and a motor controller. The motor controller adopts the heat dissipation structure in the above embodiment to cool the power module of the motor controller, and the drive assembly has the advantages of high power density and good heat dissipation performance.

The above are only specific embodiments of the present invention, and those skilled in the art can make other improvements or modifications on the basis of the above embodiments under the above teachings of the present invention. Those skilled in the art should understand that the above-mentioned specific description is only for better explaining the purpose of the present invention, and the protection scope of the present invention should be based on the protection scope of the claims.

Claims (10)

1. A heat dissipation structure for a power module of a motor controller, wherein the heat dissipation structure comprises a power module and a heat dissipation housing; A heat dissipation channel is formed between the power module and the heat dissipation housing, and a heat dissipation protrusion is provided on the end surface of the power module, and a heat dissipation groove corresponding to the heat dissipation protrusion is provided on the heat dissipation case. A gap is provided between the top of the heat dissipation protrusion and the groove bottom and the groove wall of the heat dissipation groove. 2 . The heat dissipation structure according to claim 1 , wherein the size of the notch of the heat dissipation groove is larger than the size of the bottom of the groove. 3 . 3 . The heat dissipation structure according to claim 1 , wherein the top end of the heat dissipation protrusion is inserted into the heat dissipation groove. 4 . 4 . The heat dissipation structure according to claim 1 , wherein the cross-sectional shape of the top end of the heat dissipation protrusion is consistent with the cross-sectional shape of the heat dissipation groove. 5 . 5 . The heat dissipation structure according to claim 1 , wherein the distances from the top end of the heat dissipation protrusion to each groove wall of the heat dissipation groove are the same. 6 . 6 . The heat dissipation structure according to claim 5 , wherein the distance from the top end of the heat dissipation protrusion to the groove wall of the heat dissipation groove is 0.2 to 1.4 times the diameter of the top end of the heat dissipation protrusion. 7 . 7 . The heat dissipation structure according to claim 5 , wherein the distance between the top end of the heat dissipation protrusion and the groove wall and the groove bottom of the heat dissipation groove is the same. 8 . 8 . The heat dissipation structure according to claim 2 , wherein the groove bottom and the groove wall of the heat dissipation groove are arc-shaped. 9 . 9 . The heat dissipation structure according to claim 1 , wherein the top end of the heat dissipation protrusion is tapered or arcuate. 10 . 10. A drive assembly, characterized in that the drive assembly comprises a motor and a motor controller, and the motor controller adopts the heat dissipation structure of any one of claims 1-9 to cool the power of the motor controller module.

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