A heat dissipation structure of a permanent magnet motor frequency converter

Abstract

The utility model discloses a kind of permanent magnet motor frequency converter heat dissipation structure, including heat-conducting substrate, several heat dissipation fins are evenly spaced and distributed on the heat-conducting substrate, continuous V-shaped fin is equipped between adjacent heat dissipation fins, the surface of heat-conducting substrate between adjacent heat dissipation fins is also provided with heat dissipation runner, the outer symmetry of the heat dissipation fin of heat-conducting substrate is installed with side plate, and top plate is fixed on the side plate, the side of heat dissipation fin close to side plate and top plate is connected with heat reflection layer, rectangular heat dissipation channel is formed between heat-conducting substrate, side plate and top plate, the import end of this heat dissipation channel is installed with heat dissipation fan by flow guide cover.The heat dissipation fin and V-shaped fin set by the utility model effectively increase heat dissipation area, so that heat is not easy to concentrate in the middle region of aluminium profile and is difficult to dissipate, improve heat dissipation uniformity, simultaneously under the action of heat reflection layer, heat is concentrated in rectangular heat dissipation channel, and it will not excessively spread to all around.

Description

Technical Field

[0001] This utility model relates to the field of permanent magnet motor technology, and in particular to a heat dissipation structure for a permanent magnet motor frequency converter. Background Technology

[0002] A frequency converter for a permanent magnet motor is an electrical device used to regulate the motor's speed and torque by changing the frequency and voltage of the power supply. Currently, to facilitate frequency converter control, improve converter efficiency, and reduce electromagnetic interference, the frequency converter is usually installed close to the surface of the motor.

[0003] When the frequency converter is installed on the surface of the motor close to the motor, heat dissipation is mainly achieved by using aluminum profile heat sink fins and forced air cooling. However, traditional aluminum profile heat sinks have a heat accumulation effect, making it difficult for heat in the middle to dissipate. In addition, the airflow distribution in the forced air cooling system is uneven. Due to the poor design of the heat dissipation channel, heat is easily dissipated to the surroundings, which in turn aggravates the heating of the motor itself. This results in problems of low heat dissipation efficiency and poor uniformity.

[0004] To address this issue, we propose a heat dissipation structure for permanent magnet motor frequency converters. Utility Model Content

[0005] The purpose of this invention is to provide a heat dissipation structure for a permanent magnet motor frequency converter to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A heat dissipation structure for a permanent magnet motor frequency converter includes a heat-conducting substrate with a plurality of heat dissipation fins evenly spaced on the substrate. A continuous V-shaped heat dissipation fin is provided between adjacent heat dissipation fins. A heat dissipation channel is also formed on the surface of the heat-conducting substrate between adjacent heat dissipation fins. Side plates are symmetrically mounted on the outermost heat dissipation fins of the heat-conducting substrate, and a top plate is fixed on the side plates. A heat-reflective layer is connected to the side plates and the top plate near the heat dissipation fins. A rectangular heat dissipation channel is formed between the heat-conducting substrate, the side plates, and the top plate. A cooling fan is installed at the inlet end of the heat dissipation channel through a flow guide.

[0008] In a further embodiment, the lower surface of the thermally conductive substrate is covered with a thermally conductive silicone grease layer.

[0009] In a further embodiment, the heat dissipation channel adopts a continuous honeycomb structure.

[0010] In a further embodiment, the inlet end of the heat dissipation channel is chamfered to form a tapered guide port.

[0011] In a further embodiment, the inner top surface of the top plate is provided with slots that correspond one-to-one with the heat dissipation fins.

[0012] In a further embodiment, the air guide shroud adopts a bucket-shaped structure with one end larger than the other, and the larger end of the air guide shroud is close to the cooling fan.

[0013] In a further embodiment, the heat-reflective layer is either aluminum foil or silver plating.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention uses a heat-conducting substrate to contact the surface of the inverter's heating element for outward heat conduction. The heat dissipation fins and V-shaped heat sinks effectively increase the heat dissipation area, making it less likely for heat to concentrate in the central area of ​​the aluminum profile and thus improving heat dissipation uniformity. At the same time, the heat reflection layer concentrates the heat within the rectangular heat dissipation channel, preventing excessive dissipation and reducing the impact of heat on the motor itself. The cooling fan provides forced air cooling to the rectangular heat dissipation channel, forming a straight heat dissipation channel that directly removes heat, effectively improving heat dissipation efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the air outlet side structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the air inlet side structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of this utility model after the cooling fan has been removed;

[0019] Figure 4 This is a schematic diagram of the structure of this utility model after the cooling fan and air guide cover have been removed;

[0020] Figure 5 This is a top view of the thermally conductive substrate structure of this utility model.

[0021] In the figure: 1. Thermally conductive substrate; 2. Heat dissipation fins; 3. Heat dissipation channel; 31. Tapered flow port; 4. V-shaped heat sink; 5. Side plate; 6. Top plate; 61. Slot; 7. Shielding; 8. Cooling fan; 9. Thermal grease layer; 10. Heat reflective layer. Detailed Implementation

[0022] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] 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.

[0025] Please see Figure 1-5 A heat dissipation structure for a permanent magnet motor frequency converter includes a heat-conducting substrate 1 for heat conduction. Specifically, the lower surface of the heat-conducting substrate 1 is covered with a thermally conductive silicone grease layer 9 to fill the gap between the surface of the frequency converter's heat-generating component and the surface of the heat-conducting substrate 1, thereby reducing thermal resistance. Several heat dissipation fins 2 are evenly distributed on the heat-conducting substrate 1 and are perpendicularly connected to the heat-conducting substrate 1. A continuous V-shaped heat dissipation fin 4 is provided between adjacent heat dissipation fins 2, and the turning point of the V-shaped heat dissipation fin 4 is fixed to the surface of the heat dissipation fin 2, thereby increasing the heat dissipation area. Heat dissipation channels 3 are also provided on the surface of the heat-conducting substrate 1 located between adjacent heat dissipation fins 2 to further increase the heat dissipation area. Specifically, the heat dissipation channels 3 adopt a continuous honeycomb structure to extend the channel length. The inlet end of the heat dissipation channels 3 is chamfered to form a tapered guide port 31 to facilitate airflow.

[0026] Side plates 5 are symmetrically mounted on the outermost heat dissipation fins 2 on the thermally conductive substrate 1, and a top plate 6 is fixed on the side plates 5. Specifically, the inner top surface of the top plate 6 has slots 61 that correspond one-to-one with the heat dissipation fins 2, so that the top of the heat dissipation fins 2 can be inserted into the slots 61 and limited. The side plates 5 and the top plate 6 are connected to the sides of the heat dissipation fins 2. Specifically, the heat reflection layer 10 is made of aluminum foil or silver plating to reflect heat and prevent heat from dissipating to the surroundings and affecting the motor. A rectangular heat dissipation channel is formed between the thermally conductive substrate 1, the side plates 5 and the top plate 6. A cooling fan 8 is installed at the inlet end of the heat dissipation channel through a guide shroud 7. Specifically, the guide shroud 7 adopts a bucket-shaped structure with one end larger than the other, and the larger end of the guide shroud 7 is close to the cooling fan 8, so that the airflow generated by the cooling fan 8 can be guided into the heat dissipation channel by the guide shroud 7.

[0027] In actual design, the air intake side of the cooling fan 8 faces the cutout on one side of the inverter housing, while the outlet side of the rectangular heat dissipation channel formed by the heat-conducting substrate 1, side plate 5 and top plate 6 faces the cutout on the other side of the inverter housing, so as to facilitate the exhaust of heat from the inverter housing. In addition, a filter screen needs to be installed outside the cutout to filter out impurities in the air.

[0028] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0029] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A heat dissipation structure for a permanent magnet motor frequency converter, comprising a heat-conducting substrate (1), characterized in that: The heat-conducting substrate (1) has a number of heat dissipation fins (2) evenly spaced. A continuous V-shaped heat dissipation fin (4) is provided between adjacent heat dissipation fins (2). A heat dissipation channel (3) is also provided on the surface of the heat-conducting substrate (1) between adjacent heat dissipation fins (2). Side plates (5) are symmetrically installed on the outermost heat dissipation fins (2) of the heat-conducting substrate (1), and a top plate (6) is fixed on the side plate (5). A heat reflection layer (10) is connected to the side of the side plate (5) and the top plate (6) near the heat dissipation fins (2). A rectangular heat dissipation channel is formed between the heat-conducting substrate (1), the side plate (5) and the top plate (6). A cooling fan (8) is installed at the inlet end of the heat dissipation channel through a guide shroud (7).

2. The heat dissipation structure for a permanent magnet motor frequency converter according to claim 1, characterized in that: The lower surface of the thermally conductive substrate (1) is covered with a thermally conductive silicone grease layer (9).

3. The heat dissipation structure for a permanent magnet motor frequency converter according to claim 1, characterized in that: The heat dissipation channel (3) adopts a continuous honeycomb structure.

4. The heat dissipation structure for a permanent magnet motor frequency converter according to claim 1, characterized in that: The inlet end of the heat dissipation channel (3) is chamfered to form a tapered guide port (31).

5. The heat dissipation structure for a permanent magnet motor frequency converter according to claim 1, characterized in that: The top surface of the top plate (6) is provided with slots (61) that correspond one-to-one with the heat dissipation fins (2).

6. The heat dissipation structure for a permanent magnet motor frequency converter according to claim 1, characterized in that: The air guide shroud (7) adopts a bucket-shaped structure with one end larger than the other, and the larger end of the air guide shroud (7) is close to the cooling fan (8).

7. The heat dissipation structure for a permanent magnet motor frequency converter according to claim 1, characterized in that: The heat reflective layer (10) is made of either aluminum foil or silver plating.

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