CN219893506U - NMOS tube heat dissipation device of permanent magnet synchronous motor driver - Google Patents

Abstract

The utility model relates to an NMOS (N-channel metal oxide semiconductor) tube heat radiating device of a permanent magnet synchronous motor driver, and belongs to the technical field of heat radiating devices. The NMOS tube heat dissipation device of the permanent magnet synchronous motor driver comprises an NMOS tube, a PCB and a copper column, wherein the bottom of the NMOS tube is provided with the PCB, a through hole is formed in the center of the PCB, the copper column is of a T-shaped table, a small end of the copper column passes through the through hole and then clings to the NMOS tube, and a big end of the copper column is attached to a heat dissipation piece. The beneficial effects are that: the temperature of the NMOS tube is not transferred to the PCB and is quickly transferred to the heat dissipation piece through the copper column.

Description

NMOS tube heat dissipation device of permanent magnet synchronous motor driver

Technical Field

The utility model belongs to the technical field of heat dissipation devices, and particularly relates to an NMOS (N-channel metal oxide semiconductor) tube heat dissipation device of a permanent magnet synchronous motor driver.

Background

With the rapid development of electric motor in the automobile industry, steering control is developed to a wire control direction, and the requirements on a steering controller (EPS ECU) are higher and higher. The EPS working principle is to acquire torque and angle information of a steering wheel and drive a permanent magnet synchronous motor to output torque to drive mechanical power-assisted steering. The permanent magnet synchronous motor driver is generally driven in a full-bridge mode, and the driving current is in the range of 0A-120A. The whole current mainly flows to the NMOS tube, so that the NMOS tube can generate a large amount of heat. If the heat of the NMOS tube cannot be conducted away quickly, the performance of the NMOS tube is extremely reduced, the state is unstable, and even the NMOS tube burns out. The traditional heat dissipation mode is to increase NMOS tube package and heat conduction from the via hole to a heat dissipation aluminum plate on the back of the PCB. Under the condition of instantaneous heavy current, the temperature rising rate of the NMOS tube is far greater than the heat radiating rate, so that the NMOS tube is in a high-temperature state for a long time, the damage probability of the NMOS tube is increased, and meanwhile, the PCB around the NMOS tube is accompanied with temperature rising, so that the problems of pad and copper sheet peeling and the like are caused.

Disclosure of Invention

The utility model provides an NMOS tube heat dissipation device of a permanent magnet synchronous motor driver, which aims to solve the technical problems, wherein the temperature of an NMOS tube is not transferred to a PCB and is quickly transferred to a heat dissipation piece through a copper column.

The technical scheme for solving the technical problems is as follows: NMOS pipe heat abstractor of PMSM driver includes: NMOS pipe, PCB board and copper post, the bottom of NMOS pipe is equipped with the PCB board, the center department of PCB board is equipped with the via hole, the copper post is T platform type, the tip of copper post passes after passing the via hole hugs closely the NMOS pipe, the big head end pastes and establishes on the radiating member.

The beneficial effects are that: the temperature of the NMOS tube cannot be transferred to the PCB, and the temperature is quickly transferred to the heat dissipation piece through the copper column, so that the NMOS tube cannot be damaged.

Preferably, the diameter of the small end of the copper pillar is smaller than the diameter of the via hole.

Preferably, a heat conductor is further arranged between the copper column and the heat dissipation piece.

Preferably, the heat conductor is a thermally conductive grease.

Preferably, the heat dissipation element is a heat dissipation aluminum plate.

Preferably, the diameter of the small head end of the copper column is 2.6mmm, and the diameter of the large head end is 6mm.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

In the drawings, the list of components represented by the various numbers is as follows:

1. an NMOS tube; 2. a PCB board; 3. copper columns; 4. heat conduction and grease condensation; 5. and a heat dissipation aluminum plate.

Detailed Description

The principles and features of the present utility model are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the utility model and are not to be construed as limiting the scope of the utility model.

Examples

As shown in fig. 1, this embodiment provides an NMOS heat dissipation device of a permanent magnet synchronous motor driver, including: NMOS pipe 1, PCB board 2 and copper post 3, the bottom of NMOS pipe 1 is equipped with PCB board 2, the center department of PCB board 2 is equipped with via hole 6, copper post 3 is T platform type, copper post 3's tip passes behind the via hole 6 hug closely NMOS pipe 1, copper post 3's tip's diameter is less than the diameter of via hole 6 avoids giving PCB board 2 with heat energy transfer, and big head end subsides are established on the radiating member, copper post 3's tip's diameter is 2.6mmm, and big head end's diameter is 6mm, increases with the area of spare for heat conduction.

Preferably, a heat conductor is further arranged between the copper column 3 and the heat dissipation member, and the heat conductor is heat-conducting grease 4. Of course, other heat conducting materials can be selected to meet the heat conducting function.

Preferably, the heat dissipation piece is a heat dissipation aluminum plate 5, so that the heat dissipation efficiency is improved, and the cost is low. Of course, other heat conducting materials can be selected to meet the heat dissipation function.

Working principle:

during the use, paste copper post 3 on the via hole 6 of PCB board 2 when the paster of PCB board 2, guarantee and NMOS pipe 1 fully contact, directly fill heat conduction grease 4 at copper post 3 and heat dissipation aluminum plate 5, can be with the heat on the copper post 3 transfer fast to heat dissipation aluminum plate 5 to play the cushioning effect between copper post 3 and heat dissipation aluminum plate 5.

In the description of the present utility model, it should be understood that the terms "center", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "inner", "outer", "peripheral side", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the system or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the utility model are intended to be included within the scope of the utility model.

Claims (6)

1. NMOS tube heat dissipation device of permanent magnet synchronous motor driver, characterized by comprising:

NMOS pipe (1), PCB board (2) and copper post (3), the bottom of NMOS pipe (1) is equipped with PCB board (2), the center department of PCB board (2) is equipped with via hole (6), copper post (3) are T platform type, the tip of copper post (3) is passed hugged closely behind via hole (6) NMOS pipe (1), big head end subsides are established on the radiating member.

2. NMOS transistor heat sink for a permanent magnet synchronous motor drive according to claim 1, characterized in that the diameter of the small head end of the copper pillar (3) is smaller than the diameter of the via hole (6).

3. The NMOS tube heat sink of a permanent magnet synchronous motor drive according to claim 1, wherein a heat conductor is further provided between the copper pillar (3) and the heat sink.

4. An NMOS transistor heat sink for a permanent magnet synchronous motor drive according to claim 3, wherein the thermal conductor is a thermally conductive grease (4).

5. NMOS transistor heat sink for a permanent magnet synchronous motor drive according to any of claims 1-4, characterized in that the heat sink is a heat dissipating aluminium plate (5).

6. NMOS transistor heat sink for a permanent magnet synchronous motor drive according to any of claims 1-4, characterized in that the diameter of the small head end of the copper pillar (3) is 2.6mmm and the diameter of the large head end is 6mm.