Power unit and motor controller
By designing an extended heat dissipation area on the radiator of the motor controller and leading the wiring terminals of the capacitor and DC copper bars to this area, the problem of poor heat dissipation of the existing motor controller is solved, and efficient heat dissipation effect and compact structural design are achieved.
Patent Information
- Application Number
- CN202421570831.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-04
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-07-04
AI Technical Summary
The existing motor controller has poor heat dissipation effect, especially the heat dissipation of other components such as capacitors has not been effectively considered, resulting in poor overall heat dissipation, large volume and large space.
A power unit is designed to extend the second heat dissipation area outside the first heat dissipation area of the power assembly and the capacitor assembly on the radiator, increase the heat dissipation area, and lead the terminals of the DC copper row out of the second heat dissipation area, and set the X capacitor and Y capacitor in the second heat dissipation area, so that the radiator can synchronize all heat generating components.
The synchronous heat dissipation of all heating components by a single heat dissipation component is achieved, which significantly improves the heat dissipation effect and reduces material costs. Moreover, each component is compactly stacked, with high space utilization and high power density.
Smart Images
Figure CN222869257U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of automobile technology, and in particular to a power unit and a motor controller. Background Art
[0002] As the power conversion unit connecting the battery and the motor in new energy vehicles, the motor controller is the core of the motor drive and control system. The power module in the motor controller often contains a large number of heat sources, such as power components, capacitor components, etc. During operation, each component needs to be cooled, otherwise it may directly affect the normal operation of the motor controller.
[0003] At present, most motor controllers only dissipate heat for power components, without considering the heat dissipation of other components such as capacitors, resulting in poor overall heat dissipation of the motor controller. In the related art, there are also structures for dissipating heat for other components such as capacitors, but they generally have problems such as poor heat dissipation and large size. Utility Model Content
[0004] Based on this, the utility model provides a power unit and a motor controller to solve the problems of poor heat dissipation, large size and large space occupied by the existing power unit.
[0005] On the one hand, the utility model provides a power unit, including: a heat sink, a power component, a DC copper bus, an AC copper bus, a capacitor component and an anti-interference component;
[0006] The heat sink has a first heat dissipation surface and a second heat dissipation surface along the thickness direction, the power component and the capacitor component are respectively installed in the first heat dissipation area of the first heat dissipation surface and the second heat dissipation surface, and the heat sink is provided with a second heat dissipation area extending outwardly from the first heat dissipation area;
[0007] The DC copper bar comprises a positive copper bar and a negative copper bar electrically connected between the power component and the capacitor component, and the connection terminals of the positive copper bar and the negative copper bar are both led outward from the second heat dissipation area;
[0008] The AC copper busbar is electrically connected to the power component;
[0009] The anti-interference component includes an X capacitor, a Y capacitor and a filter magnetic ring. The X capacitor and the Y capacitor are electrically connected between the positive copper bar and the negative copper bar and are both located in the second heat dissipation area. The filter magnetic ring is sleeved on the connection terminals of the positive copper bar and the negative copper bar.
[0010] In one embodiment, the X capacitor and the Y capacitor are disposed on the first heat dissipation surface and / or the second heat dissipation surface.
[0011] In one embodiment, the X capacitor is disposed on the second heat dissipation surface, and the Y capacitor is disposed on the first heat dissipation surface.
[0012] In one embodiment, the positive copper bar and the negative copper bar are connected to a first connecting branch extending below the second heat dissipation surface, and the first connecting branch is connected to the X capacitor;
[0013] The positive copper bar and the negative copper bar are connected with a second connecting branch row extending above the first heat dissipation surface, and the second connecting branch row is connected to the Y capacitor.
[0014] In one embodiment, the power unit further includes a discharge resistor, which is electrically connected between the positive copper bar and the negative copper bar and is located in the second heat dissipation area.
[0015] In one embodiment, the discharge resistor is arranged on the second heat dissipation surface, and the positive copper bar and the negative copper bar are connected with a third connecting branch extending to below the second heat dissipation surface, and the third connecting branch is connected to the discharge resistor.
[0016] In one of the embodiments, the DC copper busbar and the AC copper busbar are distributed on both sides of the radiator.
[0017] In one of the embodiments, the power unit further includes a main control board, which is disposed above the power component and electrically connected to the power component.
[0018] In one of the embodiments, an insulating layer and / or a heat conducting layer is provided between the capacitor component and / or the power component and / or the X capacitor and / or the Y capacitor and the heat sink.
[0019] On the other hand, the utility model further provides a motor controller, which includes the power unit of any one of the above embodiments.
[0020] Compared with the prior art, the utility model has at least the following beneficial effects: the power unit increases the heat dissipation area by extending the second heat dissipation area outside the first heat dissipation area where the power component and the capacitor component are installed on the radiator, and then the connection terminal of the DC copper busbar is led out from the second heat dissipation area, and the X capacitor and the Y capacitor are arranged in the second heat dissipation area, so that the radiator can perform synchronous heat dissipation for the power component, the capacitor component, the X capacitor, the Y capacitor, and the DC copper busbar, so that a single heat dissipation component can dissipate heat for all the heat-generating components, and the heat dissipation effect is good. In addition, the power component, the capacitor component, and the anti-interference component are installed on both sides of the radiator in the thickness direction, and each component is in direct contact with the radiator, with high heat conduction efficiency and high heat dissipation efficiency, and each component is compactly stacked, with high space utilization and high power density, effectively reducing material costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 is a schematic structural diagram of a power unit in one embodiment;
[0022] Figure 2 A schematic diagram of the structure of a power unit in another embodiment;
[0023] Figure 3 is a bottom view of a power unit in one embodiment;
[0024] Figure 4 FIG. 4 is an exploded view of a power unit in one embodiment.
[0025] The figure marks in the drawings of the specification include: radiator 1, first heat dissipation surface 101, second heat dissipation surface 102, first heat dissipation area 103, second heat dissipation area 104, power component 2, DC copper busbar 3, positive copper busbar 301, negative copper busbar 302, terminal 303, first connecting branch 304, second connecting branch 305, third connecting branch 306, AC copper busbar 4, capacitor component 5, anti-interference component 6, X capacitor 601, Y capacitor 602, filter magnetic ring 603, main control board 7, discharge resistor 8. DETAILED DESCRIPTION
[0026] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0027] It should be noted that the illustrations provided in this embodiment are only used to schematically illustrate the basic concept of the present invention.
[0028] The structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology, and are not used to limit the conditions under which the present invention can be implemented. Any structural modification, change in proportion or adjustment of size should still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.
[0029] The directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "middle", "longitudinal", "lateral", "horizontal", "inner", "outer", "radial", "circumferential" and the like in this specification are based on the directions or positional relationships shown in the drawings and are only for the convenience of simplifying the description. They do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.
[0030] On the one hand, the embodiment of the utility model provides a power unit, a heat sink 1, a power component 2, a DC copper bus 3, an AC copper bus 4, a capacitor component 5 and an anti-interference component 6;
[0031] The heat sink 1 has a first heat sink surface 101 and a second heat sink surface 102 along the thickness direction. The power component 2 and the capacitor component 5 are respectively installed in the first heat sink area 103 of the first heat sink surface 101 and the second heat sink surface 102. The heat sink 1 is provided with a second heat sink area 104 extending outward from the first heat sink area 103.
[0032] The DC copper bar 3 includes a positive copper bar 301 and a negative copper bar 302 electrically connected between the power component 2 and the capacitor component 5, and the connection terminals 303 of the positive copper bar 301 and the negative copper bar 302 are both led outward from the second heat dissipation area 104;
[0033] The AC copper busbar 4 is electrically connected to the power component 2;
[0034] The anti-interference component 6 includes an X capacitor 601, a Y capacitor 602 and a filter magnetic ring 603. The X capacitor 601 and the Y capacitor 602 are electrically connected between the positive copper bar 301 and the negative copper bar 302 and are both located in the second heat dissipation area 104. The filter magnetic ring 603 is sleeved on the connection terminals 303 of the positive copper bar 301 and the negative copper bar 302.
[0035] The power unit provided by the embodiment of the utility model increases the heat dissipation area by extending the second heat dissipation area 104 outside the first heat dissipation area 103 where the power component 2 and the capacitor component 5 are installed on the heat sink 1, and then the terminal 303 of the DC copper busbar 3 is led out from the second heat dissipation area 104, and the X capacitor 601 and the Y capacitor 602 are arranged in the second heat dissipation area 104, so that the heat sink 1 can perform synchronous heat dissipation for the power component 2, the capacitor component 5, the X capacitor 601, the Y capacitor 602, and the DC copper busbar 3, so that a single heat dissipation component can dissipate heat for all the heat-generating components, and the heat dissipation effect is good. In addition, the power component 2, the capacitor component 5 and the anti-interference component 6 are installed on both sides of the thickness direction of the heat sink 1, and each component is in direct contact with the heat sink 1, with high heat conduction efficiency and high heat dissipation efficiency, and each component is compactly stacked, with high space utilization and high power density, which effectively reduces material costs.
[0036] The power unit provided in the embodiment of the utility model is described in detail below with reference to the accompanying drawings.
[0037] Figure 1 and Figure 2 This is a schematic diagram of the structure of a power unit provided by at least one embodiment of the present utility model. Figure 1 and Figure 2 The power unit includes a heat sink 1, a power component 2, a DC copper bus 3, an AC copper bus 4, a capacitor component 5 and an anti-interference component 6.
[0038] See also Figure 4 In this embodiment, the heat sink 1 is a rectangular plate-shaped structure, which can reduce the thickness of the heat sink 1, reduce the space occupied by the power unit in the Y direction, and make the structure more compact. Of course, in other embodiments, the heat sink 1 can also be a square plate-shaped structure with other regular or irregular shapes.
[0039] In this embodiment, the heat sink 1 has a first heat dissipation surface 101 and a second heat dissipation surface 102 along the thickness direction. Figure 3 and Figure 4 As shown, the upper surface of the radiator 1 is the first heat dissipation surface 101, and the lower surface of the radiator 1 is the second heat dissipation surface 102. Compared with other sides of the radiator 1, the first heat dissipation surface 101 and the second heat dissipation surface 102 have larger areas, which is convenient for the installation and heat dissipation of various heat-generating components.
[0040] See also Figure 4In this embodiment, the radiator 1 is divided into a first heat dissipation area 103 and a second heat dissipation area 104 along the length direction, and the first heat dissipation area 103 and the second heat dissipation area 104 of the radiator 1 are mainly divided according to the length of the capacitor component 5 and the power component 2. Specifically, the length of the first heat dissipation area 103 should be at least greater than the length of the capacitor component 5 and the power component 2, so that the capacitor component 5 and the power component 2 can be installed in the first heat dissipation area 103, and the second heat dissipation area 104 is the part extending outward from the first heat dissipation area 103, and the second heat dissipation area 104 is used for the installation and heat dissipation of the anti-interference component 6. In this arrangement, the second heat dissipation area 104 is extended from the first heat dissipation area 103 where the power component 2 and the capacitor component 5 are installed on the radiator 1, thereby increasing the heat dissipation area. Then, the connection terminal 303 of the DC copper busbar 3 is led out from the second heat dissipation area 104, and the X capacitor 601 and the Y capacitor 602 are arranged in the second heat dissipation area 104, so that the radiator 1 can simultaneously dissipate heat for the power component 2, the capacitor component 5, the X capacitor 601, the Y capacitor 602, and the DC copper busbar 3, so that a single heat dissipation component can dissipate heat for all heat-generating components, and the heat dissipation effect is good.
[0041] In this embodiment, the radiator 1 can be a liquid cooling radiator, such as a water cooling radiator. Specifically, a cooling water channel is provided in the radiator 1, and the cooling water channel can be arranged along the length direction of the radiator 1, and the specific form of the cooling water channel can be not limited. For example, it can be arranged to include an integration of multiple water channels, or to be arranged in different shapes, including but not limited to forming a curved water channel or a bent water channel, etc., to increase the cooling water flow path and time, and the water channel depth can also be set to gradually increase, etc., to increase the cooling water flow speed, etc.
[0042] See also Figure 1 A water inlet and a water outlet connected to the cooling water channel are provided on the front and rear sides of the radiator 1. Of course, in other embodiments, the water inlet and the water outlet can also be arranged on the same side of the radiator 1, for example, both are arranged on the front or rear side of the radiator 1.
[0043] See also Figure 1 and Figure 4 In this embodiment, the power component 2 and the capacitor component 5 are respectively installed in the first heat dissipation area 103 of the first heat dissipation surface 101 and the second heat dissipation surface 102 of the radiator 1, that is, the power component 2 and the capacitor component 5 are stacked on the upper and lower sides of the radiator 1 along the thickness direction. Compared with the same-side stacking arrangement, such an arrangement can make the power component 2 and the capacitor component 5 directly contact the radiator 1, increase the overall heat dissipation effect of the power component 2 and the capacitor component 5, and make the structure more compact, the overall size is small, and the space utilization rate is high.
[0044] Specifically, in this embodiment, the power component 2 may include various types of modules known to those skilled in the art, such as but not limited to one or more of a single tube (MOS tube, etc.), a half-bridge module, a Boost module, a Buck module, etc. The power component 2 may be fixed in the first heat dissipation region 103 of the first heat dissipation surface 101 of the heat sink 1 by screw fixing, welding fixing, etc., and the power component 2 is closely attached to the first heat dissipation surface 101.
[0045] In this embodiment, the capacitor assembly 52 may be a plurality of types of modules known to those skilled in the art, including but not limited to busbar capacitors. The specific connection method between the capacitor assembly 52 and the heat sink 1 may be a plurality of types known to those skilled in the art, including but not limited to screw fixing, welding fixing, etc.
[0046] See also Figure 1 In this embodiment, the power unit further includes a main control board 7, which is disposed on the upper side of the power component 2. The main control board 7 is electrically connected to the power component 2 and is a control circuit board card of the power component 2.
[0047] In this embodiment, the DC copper bar 3 includes a positive copper bar 301 and a negative copper bar 302, wherein the positive copper bar 301 is electrically connected between the positive electrode of the capacitor component 5 and the power component 2, and the negative copper bar 302 is electrically connected between the negative electrode of the capacitor component 5 and the power component 2. For example, see Figure 4 The lower end of the positive copper bar 301 extends into the capacitor assembly 5 and is connected to the positive electrode of the capacitor core, and the upper end of the positive copper bar 301 extends upward to the first heat dissipation surface 101 of the radiator 1 and is connected to the power component 2. Similarly, the lower end of the negative copper bar 302 extends into the capacitor assembly 5 and is connected to the negative electrode of the capacitor core, and the upper end of the negative copper bar 302 extends upward to the first heat dissipation surface 101 of the radiator 1 and is connected to the power component 2, thereby realizing the electrical connection between the capacitor assembly 5 and the power component 2.
[0048] It can be understood that in this embodiment, the specific connection method between the positive copper busbar 301 and the negative copper busbar 302 and the capacitor component 5 and the power component 2 can be various known to those skilled in the art, including but not limited to screw fixation, welding fixation, etc., and welding is preferred in this embodiment.
[0049] In this embodiment, the AC copper busbar 4 is electrically connected to the power component 2 and has a connection end leading outward. The AC copper busbar 4 is used to connect to an external device to realize the input or output of AC power. Figure 2 In this embodiment, the AC copper busbar 4 includes a three-phase copper busbar, one end of which is located on the first heat dissipation surface 101 and is electrically connected to the power component 2, and the other end of the three-phase copper busbar, i.e., the connection end, can be connected from the side or from the top.
[0050] Furthermore, in this embodiment, the DC copper busbar 3 and the AC copper busbar 4 are distributed on both sides of the radiator 1. For example, see Figure 1 , the positive copper bar 301 and the negative copper bar 302 are extended upward from the right side of the radiator 1, see Figure 2 The connection end of the AC copper bar 4 is extended downward from the left side of the radiator 1. In this way, the DC copper bar 3 and the AC copper bar 4 are opposite to the heat dissipation surfaces on the left and right sides of the radiator 1, so that the radiator 1 can dissipate heat for the DC copper bar 3 and the AC copper bar 4, thereby improving the overall heat dissipation effect of the power unit.
[0051] In this embodiment, the positive copper busbar 301 and the negative copper busbar 302 both have a terminal 303, and the terminal 303 is used to connect to an external device to achieve the input or output of direct current. Figure 4 , the terminals 303 of the positive copper bar 301 and the negative copper bar 302 extend horizontally to the outside of the capacitor assembly 5, and are finally led outward from the bottom of the second heat dissipation area 104 of the radiator 1. Such an arrangement not only allows the terminals 303 of the positive copper bar 301 and the negative copper bar 302 to dissipate heat through the second heat dissipation area 104 of the radiator 1, but also facilitates the arrangement of the components of the anti-interference assembly 6 that need to be connected to the positive copper bar 301 and the negative copper bar 302 in the second heat dissipation area 104, providing a basis for the heat dissipation of the anti-interference assembly 6.
[0052] For details, see Figure 3 and Figure 4 In this embodiment, the anti-interference component 6 includes an X capacitor 601, a Y capacitor 602 and a filter magnetic ring 603. The X capacitor 601 and the Y capacitor 602 are electrically connected between the positive copper bar 301 and the negative copper bar 302 and are both located in the second heat dissipation area 104. The filter magnetic ring 603 is sleeved on the connection terminals 303 of the positive copper bar 301 and the negative copper bar 302. In this way, the anti-interference architecture composed of the Y capacitor 602, the X capacitor 601 and the filter magnetic ring 603 can effectively suppress interference in the full frequency band and meet the product EMC (electromagnetic compatibility) requirements. In addition, the X capacitor 601 and the Y capacitor 602 are both arranged in the second heat dissipation area 104, so that the radiator 1 can dissipate heat for each anti-interference component, realize a single heat dissipation component to dissipate heat for all the heat-generating components of the power unit, and make the overall heat dissipation effect of the power unit better.
[0053] In this embodiment, both the X capacitor 601 and the Y capacitor 602 can be disposed on the first heat dissipation surface 101 or the second heat dissipation surface 102. Based on this, the arrangement of the X capacitor 601 and the Y capacitor 602 has multiple combinations. For example, the X capacitor 601 and the Y capacitor 602 can be disposed on the first heat dissipation surface 101 or the second heat dissipation surface 102, or can be disposed on the first heat dissipation surface 101 or the second heat dissipation surface 102 respectively. To ensure the heat dissipation effect of the X capacitor 601 and the Y capacitor 602, in this embodiment, the X capacitor 601 and the Y capacitor 602 are preferably distributed on the first heat dissipation surface 101 and the second heat dissipation surface 102 in a dispersed manner, for example Figure 4 The embodiment in which the Y capacitor 602 is disposed on the first heat dissipation surface 101 and the X capacitor 601 is disposed on the second heat dissipation surface 102 is exemplarily shown.
[0054] In this embodiment, the power unit further includes a discharge resistor 8, which is electrically connected between the positive copper bar 301 and the negative copper bar 302 and is located in the second heat dissipation area 104. Figure 3 and Figure 4 The discharge resistor 8 is arranged on the second heat dissipation surface 102 of the heat sink 1 and arranged side by side with the X capacitor 601. In this way, the current between the positive copper bar 301 and the negative copper bar 302 is actively discharged by the discharge resistor 8, which can improve the safety of the power unit. Moreover, the discharge resistor 8 is placed in the second heat dissipation area 104, so that the discharge resistor 8 can be cooled by the heat sink 1 to avoid safety problems caused by its over-high temperature.
[0055] See also Figure 3 and Figure 4 In this embodiment, the positive copper bar 301 and the negative copper bar 302 are integrally connected with the first connecting branch 304, the second connecting branch 305 and the third connecting branch 306. The first connecting branch 304 extends inwardly and is connected to the X capacitor 601, the second connecting branch 305 extends upwardly from both sides of the heat sink 1 to the second heat dissipation surface 102 and is connected to the Y capacitor 602, and the third connecting branch 306 extends inwardly and is connected to the discharge resistor 8, so that the positive copper bar 301, the negative copper bar 302 and the discharge resistor 8 can be electrically connected to the positive copper bar 301 and the negative copper bar 302.
[0056] Further, in the present embodiment, an insulating layer and / or a heat conducting layer are provided between the capacitor component 5 and / or the power component 2 and / or the X capacitor 601 and / or the Y capacitor 602 and the radiator 1. That is to say, an insulating layer and / or a heat conducting layer are provided between any one component, any two components, any three components and four components of the capacitor component 5, the power component 2, the X capacitor 601 and the Y capacitor 602 and the surface of the radiator 1. In the present embodiment, preferably, an insulating layer and a heat conducting layer are provided between the part where each component is in contact with the radiator 1 or the part with a smaller gap and the radiator 1. For example, an insulating layer and a heat conducting layer are provided between the power component 2 and the side of the radiator 1, an insulating layer and a heat conducting layer are provided between the radiator 1 and the capacitor component 5, and an insulating layer and a heat conducting layer are provided between the X capacitor 601 and the Y capacitor 602 and the radiator 1. Specifically, the insulating layer can be insulating paper, insulating glue, etc., and the heat conducting layer can be made of thermally conductive glue. With such a configuration, the insulating layer can insulate between each component and the heat sink 1 to prevent safety issues caused by excessive current burning through, and the thermal conductive layer can enhance the heat conduction efficiency between each component and the heat sink 1 to improve the heat dissipation effect.
[0057] In this embodiment, the power component 2, the capacitor component 5, the DC copper busbar 3, and the AC copper busbar 4 are arranged around the first heat dissipation area 103 of the radiator 1, and the terminal 303 of the DC copper busbar 3 and the components of the anti-interference component 6 are arranged around the second heat dissipation area 104 of the radiator 1, so that a single heat dissipation component can dissipate heat for all heat-generating components, the heat dissipation effect is good, and the positions of the components are reasonably distributed, the overall structure is compact, the space utilization rate is high, the power density is high, and the material cost is effectively reduced.
[0058] On the other hand, an embodiment of the present invention further provides a motor controller, which includes a power unit according to any one of the above embodiments.
[0059] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0060] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.
Claims
1. A power unit, characterized in that: include: A heat sink (1), a power component (2), a DC copper busbar (3), an AC copper busbar (4), a capacitor component (5) and an anti-interference component (6); The heat sink (1) has a first heat sink surface (101) and a second heat sink surface (102) along the thickness direction; the power component (2) and the capacitor component (5) are respectively mounted in first heat sink areas (103) of the first heat sink surface (101) and the second heat sink surface (102); and the heat sink (1) is provided with a second heat sink area (104) extending outwardly from the first heat sink area (103); The DC copper busbar (3) comprises a positive copper busbar (301) and a negative copper busbar (302) electrically connected between the power component (2) and the capacitor component (5), and the connection terminals (303) of the positive copper busbar (301) and the negative copper busbar (302) are both led outward from the second heat dissipation area (104); The AC copper busbar (4) is electrically connected to the power component (2); The anti-interference component (6) comprises an X capacitor (601), a Y capacitor (602) and a filter magnetic ring (603); the X capacitor (601) and the Y capacitor (602) are electrically connected between the positive copper bar (301) and the negative copper bar (302) and are both located in the second heat dissipation area (104); and the filter magnetic ring (603) is sleeved on the connection terminals (303) of the positive copper bar (301) and the negative copper bar (302).
2. The power unit according to claim 1, characterized in that: The X capacitor (601) and the Y capacitor (602) are arranged on the first heat dissipation surface (101) and / or the second heat dissipation surface (102).
3. The power unit according to claim 2, characterized in that: The X capacitor (601) is arranged on the second heat dissipation surface (102), and the Y capacitor (602) is arranged on the first heat dissipation surface (101).
4. The power unit according to claim 3, characterized in that: The positive copper bar (301) and the negative copper bar (302) are connected to a first connection branch bar (304) extending below the second heat dissipation surface (102), and the first connection branch bar (304) is connected to the X capacitor (601); The positive copper busbar (301) and the negative copper busbar (302) are connected to a second connection branch (305) extending above the first heat dissipation surface (101), and the second connection branch (305) is connected to the Y capacitor (602).
5. The power unit according to claim 1, characterized in that: The power unit further comprises a discharge resistor (8), wherein the discharge resistor (8) is electrically connected between the positive copper busbar (301) and the negative copper busbar (302) and is located in the second heat dissipation area (104).
6. The power unit according to claim 5, characterized in that: The discharge resistor (8) is arranged on the second heat dissipation surface (102), and the positive copper bar (301) and the negative copper bar (302) are connected to a third connection branch (306) extending below the second heat dissipation surface (102), and the third connection branch (306) is connected to the discharge resistor (8).
7. The power unit according to claim 1, characterized in that: The DC copper busbar (3) and the AC copper busbar (4) are distributed on both sides of the radiator (1).
8. The power unit according to claim 1, characterized in that: The power unit further comprises a main control board (7), wherein the main control board (7) is arranged above the power component (2) and is electrically connected to the power component (2).
9. The power unit according to claim 1, characterized in that: An insulating layer and / or a heat-conducting layer is provided between the capacitor component (5) and / or the power component (2) and / or the X capacitor (601) and / or the Y capacitor (602) and the heat sink (1).
10. A motor controller, characterized in that: Comprising the power unit according to any one of claims 1 to 9.