CN220191307U - Motor with drive plate heat radiation structure - Google Patents

Abstract

The utility model relates to the technical field of heat dissipation, in particular to a motor with a drive plate heat dissipation structure, which comprises: the motor is provided with a motor rear cover, and a plurality of electronic modules are arranged on a driving plate in the motor; the driving plate is fixedly connected with a plurality of metal cooling fins which are respectively arranged at the periphery of the plurality of electronic modules and are contacted with the electronic modules through insulating heat-conducting glue, and the plurality of metal cooling fins are contacted with each other; the height of the metal radiating fin is higher than that of the electronic module, and the metal radiating fin is in contact with the inner surface of the motor rear cover. The metal radiating fin can be in multi-area contact with the rear cover of the motor at low cost, so that the radiating effect is better improved, and the safety of the motor is ensured; the insulating heat-conducting glue can enable the metal radiating fin to be short-circuited with the electronic module when the electronic module is radiated.

Description

Motor with drive plate heat radiation structure

Technical Field

The utility model relates to the technical field of heat dissipation, in particular to a motor with a driving plate heat dissipation structure.

Background

The motor is an important component in a transmission and control system, and is an electromagnetic device for realizing electric energy conversion or transmission according to the law of electromagnetic induction, and the motor is mainly used for generating driving torque as a power source of an electric appliance or various machines to convert electric energy into mechanical energy. An inner rotor motor can provide higher efficiency, output power, and higher sealability than an outer rotor motor, and can provide higher performance in the same size. However, the sealed motor has some defects, can well isolate the entry of external substances, and also causes the internal air not to circulate, so that heat cannot be effectively dissipated. The internal heat of the inner rotor motor mainly comes from the stator winding, the bearing and the driving plate, and in the process of continuously improving the required power, the heat dissipation of the winding can be solved in various modes, and the factor limiting the motor performance is mainly the heat dissipation problem of the driving plate.

In the existing motor products in the market, the electronic module for generating heat on the driving board generally transfers the heat to the metal shell through insulating heat-conducting glue and then radiates the heat through air convection. Like among the prior art, chinese patent application No. 202222594267.0, an efficient motor drive board heat radiation structure, including drive circuit board, heat conduction cushion and heating panel, the heating panel sets up the back at drive circuit board, and the heat conduction cushion sets up between drive circuit board and heating panel, and the back and the heating panel surface of drive circuit board are hugged closely respectively to the both sides surface of heat conduction cushion. According to the utility model, the heat conducting rubber pad is arranged between the driving circuit board and the heat radiating plate, so that the heat conduction effect between the driving circuit board and the heat radiating plate is enhanced in an auxiliary manner, and the heat radiating effect of the heat radiating plate on the driving circuit board can be improved.

However, the insulating heat-conducting glue has low heat-conducting efficiency and high price, so that the current small inner rotor motor can only be applied to low-power and limited use conditions, and the condition that the motor burns out occurs after the input power is improved. Therefore, the motor driving plate is subjected to heat dissipation by the structure capable of improving the heat dissipation effect.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art, and provides the motor with the driving plate heat dissipation structure, wherein the arranged metal heat dissipation fins can be in multi-area contact with the rear cover of the motor at low cost, so that the heat dissipation effect is better improved; the insulating heat-conducting glue can enable the metal radiating fin to be short-circuited with the electronic module when the electronic module is radiated.

In order to solve the technical problems, the utility model adopts the following technical scheme: an electric machine having a drive plate heat dissipation structure, comprising:

the motor is provided with a motor rear cover, and a plurality of electronic modules are arranged on a driving plate in the motor;

the driving plate is fixedly connected with a plurality of metal cooling fins which are respectively arranged at the periphery of the plurality of electronic modules and are contacted with the electronic modules through insulating heat-conducting glue, and the plurality of metal cooling fins are contacted with each other;

the height of the metal radiating fin is higher than that of the electronic module, and the metal radiating fin is in contact with the inner surface of the motor rear cover.

Further, the metal radiating fins are L-shaped, and adjacent metal radiating fins are connected end to end.

Further, the metal heat sink is soldered to the driving board by solder.

Further, the thickness of the insulating heat-conducting glue between the metal radiating fin and the electronic module is 0.1 mm-0.5 mm.

Further, one side of the insulating heat-conducting glue is in contact with the inner surface of the motor rear cover.

Further, the motor is internally and fixedly provided with a metal partition board, the metal partition board is connected with the driving board through a heat insulation rubber cushion, and the heat insulation rubber cushion is positioned between the driving board and the motor winding and used for preventing heat of the motor winding from being transferred to the driving board.

Compared with the prior art, the utility model has the beneficial effects that: the arranged metal radiating fins can be contacted with the motor rear cover in multiple areas at low cost, so that the radiating effect is better improved, and the safety of the motor is ensured;

the arranged insulating heat-conducting glue can ensure that the metal radiating fin is not in short circuit with the electronic module when radiating the electronic module;

the height of the metal radiating fin is higher than that of the electronic module, so that the metal radiating fin can collect heat of the electronic module better;

the plurality of metal radiating fins are arranged to be in contact with each other, so that heat can be conducted mutually, and the heat can be better transmitted;

to sum up so that the better transmission on drive plate and the electronic module is to motor back lid department, cools down through the air convection.

Drawings

The disclosure of the present utility model is described with reference to the accompanying drawings. It is to be understood that the drawings are designed solely for the purposes of illustration and not as a definition of the limits of the utility model. In the drawings, like reference numerals are used to refer to like parts. Wherein:

fig. 1 schematically shows an exploded construction of a proposed device according to one embodiment of the utility model;

fig. 2 schematically shows an enlarged partial structure of a device according to an embodiment of the utility model.

Reference numerals: 1. a motor; 2. a driving plate; 3. an electronic module; 4. a metal heat sink; 5. a motor rear cover; 6. a motor winding; 7. a metal separator; 8. and a heat insulation rubber cushion.

Detailed Description

It is to be understood that, according to the technical solution of the present utility model, those skilled in the art may propose various alternative structural modes and implementation modes without changing the true spirit of the present utility model. Accordingly, the following detailed description and drawings are merely illustrative of the utility model and are not intended to be exhaustive or to limit the utility model to the precise form disclosed.

Examples:

as shown in fig. 1-2, according to analysis that the internal heat of the inner rotor motor is mainly from the stator winding, the bearing and the driving plate, in the process of continuously increasing the required power, the heat dissipation of the winding can be solved in various ways, and the factor limiting the performance of the motor is mainly the heat dissipation problem of the driving plate. For this, we have designed for the heat dissipation problem of the drive board.

Firstly, the existing product is a motor 1, a step for installing a metal baffle 7 is produced on the inner wall of the motor 1 shell through machining, the distance between the step and the end face of the motor 1 shell can be controlled within +/-0.05 mm through precision machining, the metal baffle 7 is manufactured through a stamping forming process, the axial dimensional tolerance can be controlled within +/-0.1 mm, the metal baffle 7 is installed inside the motor 1 shell through interference fit, a heat insulation rubber mat 8 is adhered to the metal baffle 7, and a driving plate 2 is fixed on the metal baffle 7 through bolts and the like.

A plurality of electronic modules 3 are mounted on the drive board 2, and then a motor rear cover 5 is fixedly mounted on the motor 1, and the motor rear cover 5 enables the electronic modules 3 and the drive board 2 to be stably and safely placed in the motor 1.

The positions of a plurality of electronic modules 3 on the driving plate 2 are determined, then, metal radiating fins 4 are welded on the periphery of the electronic modules 3 through soldering tin, the metal radiating fins 4 are not in direct contact with the electronic modules 3, short circuit between the metal radiating fins 4 and the electronic modules 3 is prevented, insulating heat-conducting glue with the thickness of 0.1 mm-0.5 mm is smeared between the metal radiating fins 4 and the electronic modules 3, and the metal radiating fins 4 are in indirect contact with the electronic modules 3. The insulating glue at the top of the electronic module 3 is in contact with the motor rear cover 5. The insulating and heat-conducting glue plays a main role in preventing the pins of the electronic module 3 from coming into contact with the metal heat sink 4. Wherein the height of the metal heat sink 4 is higher than the height of the electronic module 3. The metal heat sink 4 is in contact with the motor rear cover 5. The plurality of metal heat sinks 4 are in contact with each other so that heat energy is transferred to each other and thus to the motor rear cover 5 in a larger area. So that the heat dissipation efficiency is faster. The metal radiating fins 4 which are arranged in an L shape can be contacted with each other in a head-to-tail contact mode to transfer heat mutually.

In a specific implementation, a plurality of electronic modules 3 are welded on the driving board 2, and an L-shaped metal heat sink 4 or other shaped metal heat sink 4 is welded around or on one side of each electronic module 3. The plurality of metal cooling fins 4 around the plurality of electronic modules 3 are in contact with each other, so that the plurality of metal cooling fins 4 commonly transfer heat and dissipate heat to the motor rear cover 5, and the heat dissipation effect is better. And the height of the metal radiating fins 4 is higher than that of the electronic module 3, so that heat on the electronic module 3 can be transferred to the metal radiating fins 4 as much as possible, and heat dissipation is better performed. And the insulating heat-conducting glue can avoid the short circuit between the electronic module 3 and the metal radiating fin 4. So that the heat dissipation is safe.

The metal cooling fin 4 is arranged to keep a larger contact surface with the motor rear cover 5, and meanwhile, the cost is lower. The heat dissipation effect is relatively improved. The metal radiating fins 4 are mainly used, and the insulating heat-conducting glue is used in an auxiliary mode, so that the device is lower in cost and better in radiating effect.

The technical scope of the present utility model is not limited to the above description, and those skilled in the art may make various changes and modifications to the above-described embodiments without departing from the technical spirit of the present utility model, and these changes and modifications should be included in the scope of the present utility model.

Claims (6)

1. An electric motor having a drive plate heat dissipation structure, comprising:

the motor (1), be equipped with motor back cover (5) on motor (1), install a plurality of electronic modules (3) on drive plate (2) in motor (1);

a plurality of metal cooling fins (4) are fixedly connected to the driving plate (2), are respectively arranged at the periphery of the plurality of electronic modules (3), and the metal cooling fins (4) are contacted with the electronic modules (3) through insulating heat-conducting glue, and the plurality of metal cooling fins (4) are contacted with each other;

the height of the metal radiating fin (4) is higher than that of the electronic module (3), and the metal radiating fin (4) is in contact with the inner surface of the motor rear cover (5).

2. The motor with the driving plate heat dissipation structure according to claim 1, wherein the metal heat dissipation fins (4) are L-shaped, and adjacent metal heat dissipation fins (4) are connected end to end.

3. An electric motor with a drive plate heat dissipation structure according to claim 1, characterized in that the metal heat sink (4) is soldered to the drive plate (2).

4. An electric motor with a drive plate heat dissipation structure according to claim 1, characterized in that the thickness of the insulating and heat conducting glue between the metal heat sink (4) and the electronic module (3) is 0.1 mm-0.5 mm.

5. An electric motor with a drive plate heat dissipation structure according to claim 1, characterized in that the insulating heat conducting glue at the top of the electronic module (3) is in contact with the inner surface of the motor rear cover (5).

6. A motor with a drive plate heat dissipation structure according to claim 1, characterized in that a metal separator (7) is fixedly mounted in the motor, the metal separator (7) is connected with the drive plate (2) through a heat insulation rubber pad (8), and the heat insulation rubber pad (8) is located between the drive plate (2) and the motor winding (6) and is used for preventing heat of the motor winding (6) from being transferred to the drive plate (2).