AC magnetic ring heat dissipation structure for motor controller

Abstract

The utility model discloses an AC magnetic ring heat dissipation structure for a motor controller, which comprises a shell, a magnetic core and an upper cover, the shell is fixedly connected with the upper cover, the magnetic core is positioned in an accommodating cavity defined by the shell and the upper cover, the shell comprises a first body, a first heat dissipation unit and a second heat dissipation unit, the first body is provided with a magnetic core containing groove part, a first installation protruding strip and a second installation protruding strip. According to the AC magnetic ring heat radiation structure for the motor controller disclosed by the utility model, the heat radiation fins are additionally arranged on the outer surfaces of the external connection and the upper cover, the contact area with external air is increased, the heat radiation efficiency is improved, and the cooling of the outer surface is enhanced, so that a temperature-resistant point of the plastic shell is prevented from being reached due to too fast temperature rise, and meanwhile, the heat radiation fins have the advantages of simple structure, low cost, convenience in use and the like. The production and manufacturing feasibility is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of magnetic ring heat dissipation of motor controllers, and particularly relates to an AC magnetic ring heat dissipation structure for motor controllers. Background Technique

[0002] With the vigorous development of new energy electric vehicles, the power requirements of the electric drive system are gradually increasing, and the problems of bearing durability and electromagnetic compatibility (EMC) caused by high-voltage platforms and high speeds are becoming increasingly prominent. In the electric drive system, due to factors such as the non-zero neutral point of the controller, the imbalance of the motor magnetic circuit, and the static induction of the rotating shaft, shaft voltage and common-mode current are generated, causing problems such as motor bearing corrosion and EMC. Therefore, nanocrystalline magnetic rings are often used on the three-phase AC side of the motor controller to reduce these negative effects, thereby solving the problems of bearing corrosion and electromagnetic compatibility. However, during the design, development, and experimental verification of the magnetic ring, it is found that the magnetic ring is affected by the common-mode current and is prone to saturation heating. When the temperature is too high, it will affect the performance of the magnetic ring, and heat dissipation has become an important requirement for the magnetic ring.

[0003] Therefore, in view of the above problems, further improvements are made. Content of the Utility Model

[0004] The main purpose of the utility model is to provide an AC magnetic ring heat dissipation structure for motor controllers. Heat dissipation fins are added to the outer surfaces of the external connection and the upper cover to increase the contact area with the outside air, improve the heat dissipation efficiency, and strengthen the cooling of the outer surface, thereby avoiding reaching the temperature resistance point of the plastic shell due to too fast temperature rise. At the same time, the heat dissipation fins also have the advantages of simple structure, low cost, and feasibility in production and manufacturing.

[0005] To achieve the above object, the utility model provides an AC magnetic ring heat dissipation structure for motor controllers, including a housing, a magnetic core, and an upper cover. The housing and the upper cover are fixedly connected, and the magnetic core is located in the accommodation cavity formed by the housing and the upper cover, wherein:

[0006] The housing includes a first body, a first heat dissipation unit, and a second heat dissipation unit. The first body is provided with a magnetic core placement groove portion, a first mounting rib, and a second mounting rib. The first mounting rib is located on the first outer sidewall of the magnetic core placement groove portion, and the second mounting rib is located on the second outer sidewall of the magnetic core placement groove portion. The first heat dissipation unit includes a plurality of first heat dissipation fins and second heat dissipation fins. The first heat dissipation fins include an integrally formed first component and a second component. The first component is located on the first side of the first body, and the second component is located on the second side of the first body. The second heat dissipation fins are connected between two adjacent second components. The second heat dissipation unit includes a plurality of third heat dissipation fins and fourth heat dissipation fins. The third heat dissipation fins are located on the third side of the first body, and the fourth heat dissipation fins are connected between two adjacent third heat dissipation fins.

[0007] The magnetic core is installed in the magnetic core placement groove portion. The upper cover includes a second body and a plurality of third heat dissipation units. The third heat dissipation units are installed on the second body. The second body is aligned and connected with the first body, and the third heat dissipation units are aligned with the first components one by one.

[0008] As a further preferred technical solution of the above technical solution, the second body is provided with a first mounting groove portion and a second mounting groove portion. The first mounting rib is installed in the first mounting groove portion, and the second mounting rib is installed in the second mounting groove portion.

[0009] As a further preferred technical solution of the above technical solution, the first body is provided with a first mounting end and a second mounting end.

[0010] As a further preferred technical solution of the above technical solution, the first mounting end is provided with a first mounting hole and a second mounting hole, and the second mounting end is provided with a third mounting hole and a fourth mounting hole.

[0011] As a further preferred technical solution of the above technical solution, the magnetic core is installed in the magnetic core placement groove portion by dotting or potting. Description of the Drawings

[0012] Figure 1 is a schematic structural diagram of an AC magnetic ring heat dissipation structure for a motor controller of the present invention.

[0013] Figure 2 is a schematic structural diagram of an AC magnetic ring heat dissipation structure for a motor controller of the present invention.

[0014] Figure 3 is a schematic structural diagram of an AC magnetic ring heat dissipation structure for a motor controller of the present invention (with the upper cover hidden).

[0015] Figure 4 It is a schematic structural diagram (with the upper cover hidden) of an AC magnetic ring heat dissipation structure for a motor controller of the present utility model.

[0016] Figure 5 It is a schematic structural diagram of the upper cover of an AC magnetic ring heat dissipation structure for a motor controller of the present utility model.

[0017] Figure 6 It is a schematic structural diagram of the upper cover of an AC magnetic ring heat dissipation structure for a motor controller of the present utility model.

[0018] Figure 7 It is a schematic structural diagram of the outer shell of an AC magnetic ring heat dissipation structure for a motor controller of the present utility model.

[0019] Reference numerals include: 100, outer shell; 110, first body; 111, magnetic core placement groove part; 112, first installation rib; 113, second installation rib; 114, first side; 115, second side; 116, third side; 117, first installation end; 1171, first installation hole; 1172, second installation hole; 118, second installation end; 1181, third installation hole; 1182, fourth installation hole; 120, first heat dissipation unit; 121, first heat dissipation fin; 1211, first component; 1212, second component; 122, second heat dissipation fin; 130, second heat dissipation unit; 131, third heat dissipation fin; 132, fourth heat dissipation fin; 200, magnetic core; 300, upper cover; 310, second body; 311, first installation groove part; 312, second installation groove part; 320, third heat dissipation unit. Detailed implementation manners

[0020] The following description is used to disclose the present utility model so that those skilled in the art can implement the present utility model. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles defined in the following description of the present utility model can be applied to other implementation schemes, variant schemes, improvement schemes, equivalent schemes, and other technical schemes that do not depart from the spirit and scope of the present utility model.

[0021] The present utility model discloses an AC magnetic ring heat dissipation structure for a motor controller. The specific embodiments of the utility model will be further described below in conjunction with the preferred embodiments.

[0022] In the embodiments of the present utility model, those skilled in the art should note that the dispensing and potting glue involved in the present utility model can be regarded as the prior art.

[0023] Preferred embodiment.

[0024] As Figure 1-7As shown in the figure, the present utility model discloses an AC magnetic ring heat dissipation structure for a motor controller, which includes a housing 100, a magnetic core 200, and an upper cover 300. The housing 100 and the upper cover 300 are fixedly connected, and the magnetic core 200 is located in the accommodation cavity formed by enclosing the housing 100 and the upper cover 300, where:

[0025] The housing 100 includes a first body 110, a first heat dissipation unit 120, and a second heat dissipation unit 130. The first body 110 is provided with a magnetic core placement groove portion 111, a first installation rib 112, and a second installation rib 113. The first installation rib 112 is located on the first outer side wall of the magnetic core placement groove portion 111, and the second installation rib 113 is located on the second outer side wall of the magnetic core placement groove portion 111. The first heat dissipation unit 120 includes a plurality of first heat dissipation fins 121 and second heat dissipation fins 122. The first heat dissipation fins 121 include an integrally formed first component 1211 and a second component 1212. The first component 1211 is located on the first side 114 of the first body 110, and the second component 1212 is located on the second side 115 of the first body 110. The second heat dissipation fins 122 are connected between two adjacent second components 1212. The second heat dissipation unit 130 includes a plurality of third heat dissipation fins 131 and fourth heat dissipation fins 132. The third heat dissipation fins 131 are located on the third side 116 of the first body 110, and the fourth heat dissipation fins 132 are connected between two adjacent third heat dissipation fins 131.

[0026] The magnetic core 200 is installed in the magnetic core placement groove portion 111. The upper cover 300 includes a second body 310 and a plurality of third heat dissipation units 320. The third heat dissipation units 320 are installed on the second body 310. The second body 310 is aligned and connected with the first body 110, and the third heat dissipation units 320 are aligned with the first components 1211 one by one.

[0027] Specifically, the second body 310 is provided with a first installation groove portion 311 and a second installation groove portion 312. The first installation rib 112 is installed in the first installation groove portion 311, and the second installation rib 113 is installed in the second installation groove portion 312.

[0028] More specifically, the first body 110 is provided with a first installation end 117 and a second installation end 118.

[0029] Furthermore, the first installation end 117 is provided with a first installation hole 1171 and a second installation hole 1172, and the second installation end 118 is provided with a third installation hole 1181 and a fourth installation hole 1182.

[0030] Furthermore, the magnetic core 200 is installed in the magnetic core placement groove portion 111 by dispensing or potting glue.

[0031] Regarding the present utility model:

[0032] The common-mode current is the main influencing factor for the heating of the AC magnetic ring. When the common-mode current is large, the magnetic permeability of the magnetic ring is large and the size is small, the magnetic ring is prone to saturation and heating. The magnetic core used on the three-phase AC side is usually a nanocrystalline magnetic core, and the heat-resistant point of the nanocrystalline magnetic core is about 560 °C. However, the temperature resistance of the magnetic ring plastic shell is usually below 180 °C. Therefore, the temperature rise problem is an important factor affecting the performance of the magnetic ring. Adding heat dissipation fins on the outer surface of the AC magnetic ring plastic shell increases the contact area between the plastic shell and the outside air, improves the heat dissipation efficiency, and strengthens the cooling of the outer surface of the plastic shell, thereby avoiding reaching the temperature resistance point of the plastic shell due to too fast temperature rise. At the same time, the heat dissipation fins also have the advantages of simple structure, low cost, and feasibility in production and manufacturing.

[0033] It is worth mentioning that the technical features such as dispensing and potting glue involved in the patent application of the present utility model should be regarded as the prior art. The specific structures, working principles, and possible control methods and spatial arrangement methods of these technical features can be selected conventionally in the art, and should not be regarded as the inventive points of the present utility model patent. The present utility model patent will not be further specifically elaborated.

[0034] For those skilled in the art, it is still possible to modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. An AC magnetic ring heat dissipation structure for a motor controller, characterized in that It includes a housing, a magnetic core and an upper cover. The housing and the upper cover are fixedly connected, and the magnetic core is located in the accommodation cavity formed by the housing and the upper cover, where: The housing includes a first body, a first heat dissipation unit and a second heat dissipation unit. The first body is provided with a magnetic core placement groove portion, a first installation rib and a second installation rib. The first installation rib is located on the first outer side wall of the magnetic core placement groove portion, and the second installation rib is located on the second outer side wall of the magnetic core placement groove portion. The first heat dissipation unit includes a plurality of first heat dissipation fins and second heat dissipation fins. The first heat dissipation fins include an integrally formed first component and a second component. The first component is located on the first side of the first body, and the second component is located on the second side of the first body. The second heat dissipation fins are connected between two adjacent second components. The second heat dissipation unit includes a plurality of third heat dissipation fins and fourth heat dissipation fins. The third heat dissipation fins are located on the third side of the first body, and the fourth heat dissipation fins are connected between two adjacent third heat dissipation fins. The magnetic core is installed in the magnetic core placement groove portion. The upper cover includes a second body and a plurality of third heat dissipation units. The third heat dissipation units are installed on the second body. The second body is aligned and connected with the first body, and the third heat dissipation units are aligned with the first components one by one.

2. The AC magnetic ring heat dissipation structure for a motor controller according to claim 1, characterized in that, The second body is provided with a first installation groove portion and a second installation groove portion. The first installation rib is installed in the first installation groove portion, and the second installation rib is installed in the second installation groove portion.

3. The heat dissipation structure of the AC magnetic ring for the motor controller according to claim 2, characterized in that, The first body is provided with a first installation end and a second installation end.

4. The AC magnetic ring heat dissipation structure for a motor controller according to claim 3, wherein, The first installation end is provided with a first installation hole and a second installation hole, and the second installation end is provided with a third installation hole and a fourth installation hole.

5. The AC magnetic ring heat dissipation structure for a motor controller according to claim 4, wherein The magnetic core is installed in the magnetic core placement groove portion by dotting or potting glue.

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