Motor controller

Abstract

The utility model provides a kind of motor controller, it is related to the technical field of controller, the motor controller includes heat dissipation shell, spring sheet is provided on the mounting seat, the spring sheet is butted with the upper end of the power device, the spring reduces the power device has the tendency of moving to the ceramic sheet;Heat dissipation fin is provided on the lower end surface of the heat dissipation shell.The power device of the motor controller provided by the utility model is set on ceramic sheet, and the heat of power device is transferred to heat dissipation shell through ceramic sheet;Power device is electrified, after passing through insulating ceramic sheet, it is ensured that heat dissipation shell is not electrified;Spring sheet is butted with the upper end of power device simultaneously, it is ensured that power device and ceramic sheet can be well contacted;Multiple power devices are dispersed and set on the both sides of capacitor, can disperse heat source, to better heat dissipation effect, and heat dissipation shell is cooled by air cooling, effectively reduce the weight of motor controller.

Description

Technical Field

[0001] This utility model relates to the technical field of controllers, and in particular to a motor controller. Background Technology

[0002] With strong support from national policies, aviation electrification has experienced rapid development, which has placed new demands on motor controllers, a core power component of electric aircraft.

[0003] Unlike traditional industries, the aviation industry has extremely high safety requirements and is very sensitive to weight / volume, while also facing strong vibrations during flight operations. Under these conditions, higher demands are placed on motor controllers. Utility Model Content

[0004] The purpose of this utility model is to provide a motor controller to solve the technical problems of motor controllers facing strong vibrations and having high weight requirements.

[0005] This utility model provides a motor controller, including a drive board, a capacitor, and a heat sink housing. The drive board is disposed above the capacitor, and the capacitor is disposed on the heat sink housing. Power devices are respectively disposed on both sides of the capacitor in a first direction, and the power devices are connected to the drive board; A ceramic plate corresponding to a power device is disposed on the heat dissipation housing, and the power device is disposed on the ceramic plate. A mounting base corresponding to the ceramic plate is provided on the heat dissipation housing. A spring plate is provided on the mounting base. The spring plate abuts against the upper end of the power device. The spring plate causes the power device to tend to move toward the ceramic plate. Heat dissipation fins are provided on the lower end face of the heat dissipation housing, and the heat dissipation fins are used for heat exchange with air.

[0006] In an optional embodiment, an upper mounting groove is provided on the upper surface of the heat sink housing, and the lower end of the capacitor is fixed in the upper mounting groove. In an optional embodiment, a plastic part is provided at the upper end of the drive plate, and a through hole for wires to pass through is provided on the plastic part; and a magnetic ring is sleeved on the outside of the through hole.

[0007] In an optional implementation, an NTC is soldered onto the driver board.

[0008] In an optional embodiment, an insertion hole is provided on one side of the mounting base, and a guide groove is provided on the side of the mounting base facing the insertion hole; the mounting base is also provided with a snap-fit ​​hole, which communicates with the guide groove. The spring sheet includes a spring sheet body and a fixing base, and one side of the spring sheet body is connected to the fixing base; A snap-fit ​​protrusion is provided on the fixing base, the fixing base is assembled in the insertion hole, and the snap-fit ​​protrusion moves downward along the guide groove and is inserted into the snap-fit ​​hole.

[0009] In an optional embodiment, the fixing seat is provided with a positioning groove, and a positioning protrusion matching the positioning groove is provided in the insertion hole. In an optional embodiment, a lower fixing seat is provided on the heat dissipation housing, and a lower mounting hole is provided on the lower fixing seat; An upper fixing seat is provided on the capacitor component, and the upper fixing seat is correspondingly provided with the lower fixing seat. An upper mounting hole is provided on the upper fixing seat.

[0010] In an optional embodiment, the heat dissipation housing is provided with a plurality of heat dissipation bases, each of the heat dissipation bases is provided with a ceramic plate, and adjacent heat dissipation bases are spaced apart.

[0011] In an optional embodiment, a control panel is also included, which is disposed at the upper end of the plastic part. In an optional embodiment, a housing is also included, which covers the heat dissipation housing and forms a mounting cavity with the heat dissipation housing for mounting the driver board and capacitors.

[0012] The power devices of the motor controller provided by this utility model are mounted on a ceramic plate, and the heat from the power devices is transferred to the heat sink housing through the ceramic plate. Even if the power devices are energized, the heat sink housing remains energized after passing through the insulating ceramic plate. At the same time, a spring plate is used to abut against the upper end of the power devices to ensure good contact between the power devices and the ceramic plate. Multiple power devices are distributed on both sides of the capacitor, which can disperse the heat source and achieve better heat dissipation. Furthermore, the heat sink housing is cooled by air cooling, which is much smaller than the traditional liquid cooling structure and effectively reduces the weight of the motor controller. Attached Figure Description To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0013] Figure 1 A schematic diagram of the structure of the motor controller provided in this embodiment of the utility model; Figure 2 for Figure 1 The diagram shows the structure of the motor controller from another angle; Figure 3 for Figure 1 The exploded view of the motor controller shown; Figure 4 for Figure 3 The exploded view of motor controller shown is a partial enlarged view of point A. Figure 5 for Figure 1 The diagram shows the structure of the spring plate in the motor controller.

[0014] Icons: 100-Heat sink housing; 101-Lower mounting base; 102-Upper mounting slot; 103-Heat sink base; 200-Capacitor; 300-Plastic component; 400-Heat sink fins; 500-Perforation; 600-Magnetic ring; 700-Power device; 800-Mounting base; 801-Insert hole; 802-Guide groove; 803-Snap-fit ​​hole; 900-Driver board; 110-Spring sheet; 111-Mounting base; 112-Spring sheet body; 113-Snap-fit ​​protrusion; 120-NTC; 130-Ceramic plate. Detailed Implementation

[0015] The terms “first,” “second,” “third,” etc., are used only for distinguishing descriptions and do not indicate a sequence number, nor should they be interpreted as indicating or implying relative importance.

[0016] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0017] In the description of this application, it should be noted that the terms "inner", "outer", "left", "right", "upper", "lower", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application.

[0018] In the description of this application, unless otherwise expressly specified and limited, the terms “set up,” “install,” “connect,” and “link” shall be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection; as a mechanical connection or an electrical connection; as a direct connection or an indirect connection through an intermediate medium; or as a connection within two components.

[0019] The technical solution of this application will now be clearly and completely described with reference to the accompanying drawings.

[0020] Example Reference Figures 1-5 This utility model provides a motor controller, including a drive board 900, a capacitor 200 and a heat sink 100. The drive board 900 is disposed above the capacitor 200, and the capacitor 200 is disposed on the heat sink 100. Power devices 700 are respectively provided on both sides of the capacitor 200 in the first direction, and the power devices 700 are connected to the drive board 900. A ceramic plate 130 corresponding to the power device 700 is provided on the heat dissipation housing 100, and the power device 700 is disposed on the ceramic plate 130; A mounting base 800 corresponding to the ceramic plate 130 is provided on the heat dissipation housing 100. A spring plate 110 is provided on the mounting base 800. The spring plate 110 abuts against the upper end of the power device 700. The spring reduces the tendency of the power device 700 to move toward the ceramic plate 130. Heat dissipation fins 400 are provided on the lower end surface of the heat dissipation housing 100, and the heat dissipation fins 400 are used for heat exchange with air.

[0021] In some embodiments, by taking advantage of the wind field characteristics of the aircraft propeller, the air can exchange heat with the heat dissipation fins 400 better, and the heat dissipation housing 100 can effectively dissipate heat, that is, effectively dissipate heat from the power device 700.

[0022] A capacitor 200 is provided on the heat dissipation housing 100. The customized capacitor 200 makes full use of the volume of the middle part to increase the capacitance, and integrates the bus copper bus and solves the insulation problem between the bus copper bus, making the product structure more compact and reasonable. At the same time, it reduces multiple components such as bus bus and insulation materials, improving the reliability and manufacturability of the product.

[0023] Power devices 700 are distributed on both sides of capacitor 200. Power devices 700 can be selected as single tubes with 247 packages as the power devices 700 of the whole controller. Considering that the heat dissipation substrate of the 247 single tube is charged, ceramic sheet 130 with excellent heat dissipation performance is selected for insulation treatment, and spring sheet 110 is used to press it to meet the operating pressure range required by the product.

[0024] In an optional embodiment, an upper mounting groove 102 is provided on the upper end surface of the heat dissipation housing 100, and the lower end of the capacitor 200 is fixed in the upper mounting groove 102. In order to ensure precise installation of the heat sink 100 and the capacitor 200, an upper mounting groove 102 is provided on the upper end face of the heat sink 100, and the capacitor 200 is placed in the upper mounting groove 102; this helps to fix the capacitor 200 and the heat sink 100 relative to each other. Reference Figure 2 In an optional embodiment, a plastic part 300 is provided on the upper end of the drive plate 900, and a through hole 500 for wires to pass through is provided on the plastic part 300; and a magnetic ring 600 is sleeved on the outside of the through hole 500.

[0025] By fully utilizing the space between the control board and the drive board 900, a plastic component 300 is designed. This addresses the issue of wire harness wear caused by vibration in the phase wires, and also allows for the placement of a magnetic ring 600 at the phase wire routing point. The magnetic ring 600, together with the current sampling board, forms the controller's current sampling structure. This solves the wire harness wear problem while reducing the space occupied by traditional current sensors. It improves the product's vibration resistance while reducing its size and weight.

[0026] Reference Figure 1 In an optional embodiment, an NTC120 is soldered onto the drive board 900.

[0027] The NTC120 is directly soldered to the driver board 900, which is different from the existing NTC120 technology that uses a wire harness connection. This eliminates the traditional NTC120 wire harness connection and effectively solves the problem of loose connections caused by wire harness vibration.

[0028] Reference Figure 4 and Figure 5 In an optional embodiment, an insertion hole 801 is provided on one side of the mounting base 800, and a guide groove 802 is provided on the side of the mounting base 800 facing the insertion hole 801; the mounting base 800 is also provided with a snap-fit ​​hole 803, which communicates with the guide groove 802. The spring sheet 110 includes a spring sheet body 112 and a fixing seat 111, with one side of the spring sheet body 112 connected to the fixing seat 111; A snap-fit ​​protrusion 113 is provided on the fixing base 111. The fixing base 111 is assembled in the insertion hole 801. The snap-fit ​​protrusion 113 moves downward along the guide groove 802 and is inserted into the snap-fit ​​hole 803.

[0029] In some embodiments, in order to fix the spring sheet 110, an insertion hole 801 is provided on one side of the mounting base 800. The fixing seat 111 of the spring sheet 110 is inserted into the insertion hole 801, and the snap-fit ​​protrusion 113 on the fixing seat 111 moves along the guide seat and is inserted into the snap-fit ​​hole 803. In this way, the fixing seat 111 cannot be removed from the insertion hole 801, that is, the spring sheet 110 is fixed on the heat sink housing 100, so that the spring sheet 110 can be kept fixed and apply pressure to the power device 700, so that the power device 700 is kept in contact with the ceramic plate 130, thereby achieving effective heat transfer.

[0030] In an optional embodiment, the fixing base 111 is provided with a positioning groove, and a positioning protrusion matching the positioning groove is provided in the insertion hole 801. To prevent the spring sheet 110 from wobbling, at least one positioning groove is provided on the fixing seat 111. Generally, only one positioning groove is provided on the fixing seat 111. Positioning protrusions corresponding to the positioning grooves are provided in the insertion hole 801. The positioning protrusions are inserted into the positioning grooves. In this way, after the fixing seat 111 is inserted into the insertion hole 801, the fixing seat 111 will not wobble in the insertion hole 801, thereby improving the stability and reliability of the spring sheet 110 installation.

[0031] Reference Figure 3 In an optional embodiment, a lower fixing seat 101 is provided on the heat dissipation housing 100, and a lower mounting hole is provided on the lower fixing seat 101; An upper fixing seat 111 is provided on the capacitor 200, and the upper fixing seat 111 is correspondingly provided with the lower fixing seat 101. An upper mounting hole is provided on the upper fixing seat 111.

[0032] In some embodiments, four lower fixing seats 101 are provided on the heat sink housing 100, two lower fixing seats 101 are provided at each end of the heat sink housing 100, and two lower fixing seats 101 are provided on each side of the upper mounting groove 102. Four upper fixing seats 111 are provided on the capacitor 200, and the upper fixing seats 111 are correspondingly provided with the lower fixing seats 101. Bolts are inserted into the upper mounting holes of the upper fixing seats 111 and screwed onto the lower fixing seats 101 of the heat sink housing 100, thereby firmly fixing the capacitor 200 to the heat sink housing 100.

[0033] Reference Figure 3 In an optional embodiment, the heat dissipation housing 100 is provided with a plurality of heat dissipation bases 103, each of the heat dissipation bases 103 is provided with a ceramic plate 130, and adjacent heat dissipation bases 103 are spaced apart.

[0034] To achieve better heat dissipation, multiple heat dissipation bases 103 are provided on the heat dissipation housing 100. Two adjacent heat dissipation bases 103 are spaced apart to improve heat dissipation and prevent the heat of adjacent power devices 700 from affecting each other.

[0035] In an optional embodiment, a control panel is also included, which is disposed at the upper end of the plastic part 300. In an optional embodiment, a housing is also included, which covers the heat dissipation housing 100, and the housing and the heat dissipation housing 100 form a mounting cavity for mounting the drive board 900 and the capacitor 200.

[0036] The motor controller solves the heat dissipation problem of the power transistor, thus reducing weight; it solves the insulation problem of the power transistor to the shell; it solves the problem of poor vibration resistance of traditional temperature sensors; it solves the problem of large space occupation of traditional current sampling; and it reduces the problem of many traditional connecting parts and high failure rate.

[0037] The power device 700 of the motor controller provided by this utility model is disposed on the ceramic plate 130. The heat of the power device 700 is transferred to the heat sink 100 through the ceramic plate 130. Even if the power device 700 is energized, the heat sink 100 is ensured to be de-energized after passing through the insulating ceramic plate 130. At the same time, the spring plate 110 abuts against the upper end of the power device 700 to ensure good contact between the power device 700 and the ceramic plate 130. Multiple power devices 700 are distributed on both sides of the capacitor 200, which can disperse the heat source and achieve better heat dissipation. Moreover, the heat sink 100 is cooled by air cooling, which is much smaller than the traditional liquid cooling structure and effectively reduces the weight of the motor controller.

[0038] By utilizing the airflow from the aircraft's own propellers for air cooling, the traditional liquid cooling system is eliminated, effectively reducing system weight and the number of potential failure points, thus improving system reliability. The traditional wire-connected temperature sensors are replaced, eliminating the problem of loose connections caused by vibration. A rational spatial layout eliminates the space requirements of traditional motor controller current sampling, while also achieving effective weight reduction. A well-designed integrated solution reduces the number of parts, thereby lowering the product failure rate.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A motor controller, characterized in that, It includes a drive board (900), a capacitor (200) and a heat sink (100), wherein the drive board (900) is disposed above the capacitor (200) and the capacitor (200) is disposed on the heat sink (100); Power devices (700) are respectively provided on both sides of the capacitor (200) in a first direction, and the power devices (700) are connected to the drive board (900); A ceramic plate (130) corresponding to a power device (700) is provided on the heat dissipation housing (100), and the power device (700) is disposed on the ceramic plate (130); A mounting base (800) corresponding to the ceramic plate (130) is provided on the heat dissipation housing (100). A spring plate (110) is provided on the mounting base (800). The spring plate (110) abuts against the upper end of the power device (700). The spring reduces the tendency of the power device (700) to move toward the ceramic plate (130). Heat dissipation fins (400) are provided on the lower end surface of the heat dissipation housing (100), and the heat dissipation fins (400) are used for heat exchange with air.

2. The motor controller according to claim 1, characterized in that, The upper end surface of the heat dissipation housing (100) is provided with an upper mounting groove (102), and the lower end of the capacitor (200) is fixed in the upper mounting groove (102).

3. The motor controller according to claim 1, characterized in that, The upper end of the drive plate (900) is provided with a plastic part (300), and a through hole (500) for wires to pass through is provided on the plastic part (300); and a magnetic ring (600) is sleeved on the outside of the through hole (500).

4. The motor controller according to claim 1, characterized in that, An NTC (120) is soldered onto the drive board (900).

5. The motor controller according to claim 1, characterized in that, An insertion hole (801) is provided on one side of the mounting base (800), and a guide groove (802) is provided on the side of the mounting base (800) facing the insertion hole (801); a snap-fit ​​hole (803) is also provided on the mounting base (800), and the snap-fit ​​hole (803) communicates with the guide groove (802). The spring sheet (110) includes a spring sheet body (112) and a fixing seat (111), with one side of the spring sheet body (112) connected to the fixing seat (111); A snap-fit ​​protrusion (113) is provided on the fixing seat (111). The fixing seat (111) is assembled in the insertion hole (801). The snap-fit ​​protrusion (113) moves downward along the guide groove (802) and is inserted into the snap-fit ​​hole (803).

6. The motor controller according to claim 5, characterized in that, The fixing seat (111) is provided with a positioning groove, and the insertion hole (801) is provided with a positioning protrusion that matches the positioning groove.

7. The motor controller according to claim 6, characterized in that, The heat dissipation housing (100) is provided with a lower fixing seat (101), and the lower fixing seat (101) is provided with a lower mounting hole; An upper fixing seat (111) is provided on the capacitor (200), and the upper fixing seat (111) is correspondingly provided with the lower fixing seat (101). An upper mounting hole is provided on the upper fixing seat (111).

8. The motor controller according to claim 1, characterized in that, The heat dissipation housing (100) is provided with a plurality of heat dissipation bases (103), each of the heat dissipation bases (103) is provided with a ceramic plate (130), and adjacent heat dissipation bases (103) are spaced apart.

9. The motor controller according to claim 3, characterized in that, It also includes a control panel, which is disposed at the upper end of the plastic part (300).

10. The motor controller according to claim 1, characterized in that, It also includes a housing that covers the heat sink housing (100) and forms a mounting cavity with the heat sink housing (100) for mounting the drive board (900) and capacitor (200).

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