Motor controller and vehicle

Abstract

The utility model belongs to the technical field of motor control systems, and particularly relates to a motor controller and a vehicle. The motor controller provided by the utility model comprises a shell, a main control board and a shielding board, the main control board is arranged in the shell; the shielding plate is located between the bottom of the shell and the main control board, a first mounting hole is formed in the shielding plate and used for being connected with the main control board, a first groove is formed in the middle of the shielding plate in a punching mode, and the first mounting hole is located in the first groove; the edge of the shielding plate in the length direction is provided with a second mounting hole, the shielding plate is connected to the bottom of the shell through the second mounting hole, the edge of the shielding plate in the length direction is provided with protrusions in a punch forming mode, and the protrusions and the second mounting hole are arranged at intervals. The shielding plate in the technical scheme has relatively high rigidity and strength, so that the occurrence of structural resonance can be reduced.

Description

Technical Field

[0001] This utility model belongs to the field of motor control system technology, specifically relating to a motor controller and a vehicle. Background Technology

[0002] With increasingly scarce oil resources and worsening environmental pollution, new energy vehicles are gaining popularity in the market. In terms of power, new energy vehicles place increasingly higher demands on the motors, essentially requiring higher performance from the motor controller. The motor control system plays numerous roles in the operation of new energy vehicles. For example, it controls the energy transfer between the power source and the drive motor, adjusts the motor speed according to the vehicle's speed and the driver's needs, monitors the battery's remaining charge, temperature, and other status information in real time, and adjusts the motor's torque output according to road conditions and driving requirements, among other things.

[0003] When a motor is running, changes in current generate electromagnetic waves. These waves can affect other electrical equipment and even interfere with the normal operation of sensitive devices such as communication equipment and radar. Therefore, motor controllers typically include shielding plates. Their main function is to isolate the complex electromagnetic environment, improve the control board's anti-interference capability, and thus protect the normal operation of the motor controller. In the current new energy motor controller industry, most motor controllers include main control boards, auxiliary drive control boards, and other electrical components, as well as corresponding connecting harnesses or copper busbars. Furthermore, most electrical components are mounted on shielding plates and directly connected to them via support pillars on the shielding plate. This design method results in shielding plates with poor strength and rigidity, leading to unstable cooperation between the shielding plate and other electrical components. Resonance may occur during operation, potentially causing damage to electrical components or breakage of the support pillars on the shielding plate.

[0004] Therefore, there is an urgent need to propose a motor controller and vehicle to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to solve the problem of how to improve the strength and rigidity of a shielding plate. This purpose is achieved through the following technical solution:

[0006] The first aspect of this utility model provides a motor controller, comprising:

[0007] case;

[0008] The main control board is located inside the housing;

[0009] A shielding plate is located between the bottom plate of the housing and the main control board. The shielding plate has a first mounting hole for connecting to the main control board. A first groove is stamped in the middle of the shielding plate, and the first mounting hole is located on the first groove. A second mounting hole is provided on the edge of the shielding plate along its length direction. The shielding plate is connected to the bottom of the housing through the second mounting hole. A protrusion is stamped on the edge of the shielding plate along its length direction, and the protrusion and the second mounting hole are spaced apart.

[0010] The shielding plate in this technical solution is formed by stamping, using a simple processing technique to create a complex stiffening plate structure. By stamping a first groove in the center of the shielding plate, the central part of the shielding plate gains better rigidity and strength, thereby improving its vibration resistance. Protrusions are stamped along the long edge, and these protrusions are positioned around the second mounting hole, which helps to increase the rigidity at the second mounting hole, ensuring a stable connection between the shielding plate and the shell, thus improving the overall structure's vibration resistance. Connecting the main control board and the shielding plate through the first mounting hole, and connecting the shielding plate and the main control board through the second mounting hole, makes the overall structure more compact and effectively avoids the problem of connection breakage due to resonance.

[0011] In addition, the motor controller of this utility model may also have the following additional technical features:

[0012] In some embodiments of this utility model, the shielding plate includes a base plate, a first folded edge connected to the long side of the base plate, and a second folded edge connected to the long side of the first folded edge. The first folded edge and the base plate are connected at an angle, the second folded edge is parallel to the base plate, the second mounting hole and the protrusion are disposed on the second folded edge, and the base plate and the bottom plate of the housing are spaced apart.

[0013] In some embodiments of this utility model, a plurality of concave and convex chamfer structures are provided at the connection between the first folded edge and the second folded edge.

[0014] In some embodiments of this utility model, the first folded edge is stamped with a second groove.

[0015] In some embodiments of this utility model, the main control board is connected to the first mounting hole via a first bolt.

[0016] In some embodiments of this utility model, the housing is connected by a second bolt and a second mounting hole.

[0017] In some embodiments of this utility model, the edge of the shielding plate in the width direction is stamped with a third groove.

[0018] In some embodiments of this utility model, the shielding plate includes a metal plate and an insulating coating, wherein the insulating coating covers the surface of the metal plate.

[0019] In some embodiments of this utility model, the insulating coating is an epoxy resin coating.

[0020] A second aspect of this invention provides a vehicle that includes the motor controller described in the above embodiments. Attached Figure Description

[0021] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0022] Figure 1 An exploded view of a motor controller according to an embodiment of the present invention is shown schematically.

[0023] Figure 2 A schematic diagram of the structure of a shielding plate according to an embodiment of the present invention is shown.

[0024] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle.

[0025] The labels in the attached diagram are as follows:

[0026] 100. Housing; 110. Top cover; 120. Housing body; 130. Base plate; 200. Main control board; 300. Shielding plate; 310. Base plate; 311. First mounting hole; 312. First groove; 313. Third groove; 320. First folded edge; 321. Second groove; 330. Second folded edge; 331. Second mounting hole; 332. Protrusion; 340. Concave-convex chamfered structure; 400. Copper busbar; 500. Film capacitor; 600. IGBT driver module; 700. Relay. Detailed Implementation

[0027] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0028] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0029] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0030] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations.

[0031] Figure 1 An exploded view of a motor controller according to an embodiment of the present invention is shown schematically. Figure 2 A schematic diagram of the structure of a shielding plate 300 according to an embodiment of the present invention is shown. Figure 1 and Figure 2As shown, this utility model proposes a motor controller, including a housing 100, a main control board 200, and a shielding plate 300; the main control board 200 is disposed inside the housing 100; the shielding plate 300 is located between the bottom plate 130 of the housing 100 and the main control board 200, and the shielding plate 300 is provided with a first mounting hole 311 for connecting with the main control board 200; a first groove 312 is stamped in the middle of the shielding plate 300, and the first mounting hole 311 is located on the first groove 312; the shielding plate 300 has a length direction ( Figure 2 The edge of the shielding plate 300 (in the direction indicated by the X-axis) is provided with a second mounting hole 331. The shielding plate 300 is connected to the bottom of the housing 100 through the second mounting hole 331. The edge of the shielding plate 300 in the length direction is stamped with a protrusion 332. The protrusion 332 and the second mounting hole 331 are spaced apart.

[0032] The shielding plate 300 in this technical solution is formed by stamping, using a simple processing technology to create a complex stiffening plate structure. By stamping a first groove 312 in the middle of the shielding plate 300, the middle part of the shielding plate 300 can have better rigidity and strength, thereby improving the vibration resistance of the shielding plate 300. A protrusion 332 is stamped on the edge of the long side, and the protrusion 332 is located around the second mounting hole 331, which helps to improve the rigidity at the second mounting hole 331, ensuring a stable connection between the shielding plate 300 and the housing 100, thereby improving the overall vibration resistance of the structure. Connecting the main control board 200 and the shielding plate 300 through the first mounting hole 311, and connecting the shielding plate 300 and the main control board 200 through the second mounting hole 331, makes the overall structure more compact and effectively avoids the problem of connection breakage due to resonance. In addition, the mounting holes are easy to position, thereby reducing processing and assembly errors, and the connection is convenient, which helps to improve production efficiency.

[0033] Optionally, the main control board 200 includes a main chip circuit, a power supply chip circuit, a communication circuit, a decoder circuit, a storage chip circuit, a temperature acquisition circuit, a signal amplification circuit, and a PWM (Pulse Width Modulation) output circuit, etc., responsible for overall control and coordination. See also... Figure 1The housing 100 includes a top cover 110, a housing body 120, and a bottom plate 130. The top cover 110 and the bottom plate 130 are respectively connected to the top and bottom of the housing body 120, and the shielding plate 300 is connected to the bottom plate 130. The housing 100 also houses an IGBT drive module 600, a film capacitor 500, a copper busbar 400, and a relay 700. The IGBT drive module 600 mainly functions as an AC / DC converter within the controller, used to drive the motor. The film capacitor 500 acts as a smoother in the electric vehicle drive circuit, keeping voltage fluctuations within allowable ranges and preventing voltage overshoot and transient overvoltage from affecting the IGBT drive module 600. The copper busbar 400 is divided into a DC copper busbar 400 and an AC copper busbar 400, respectively connecting the DC high-voltage connector to the film capacitor 500 and the AC high-voltage connector to the IGBT drive module 600. The relay 700 is mainly used to control the motor's start, stop, forward and reverse rotation. IGBT stands for Insulated Gate Bipolar Transistor.

[0034] Furthermore, multiple first grooves 312 are provided, and the multiple first grooves 312 are spaced apart along the length direction of the shielding plate 300. The shape of the first groove 312 can be annular, circular, rectangular, or strip-shaped, etc. Optionally, the edge of the first groove 312 is irregularly wavy to effectively improve the structural strength and rigidity.

[0035] Furthermore, the main control board 200 is connected via a first bolt and a first mounting hole 311.

[0036] Optionally, multiple first mounting holes 311 are provided as needed. Since the first mounting holes 311 are located on the first groove 312, the edges of the first mounting holes 311 can be folded towards the main control board 200 for a secure connection. During assembly, the first bolt is passed through the main control board 200 and then tightened with a nut. The bolted connection provides stability and effectively prevents loosening of components due to vibration.

[0037] Furthermore, the housing 100 is connected by a second bolt and a second mounting hole 331.

[0038] In this embodiment, multiple second mounting holes 331 are provided, and the multiple second mounting holes 331 are spaced apart. The positions of the second mounting holes 331 on the two long sides of the shielding plate 300 are opposite to each other to ensure a smooth and reliable connection between the shielding plate 300 and the housing 100.

[0039] Furthermore, the shielding plate 300 includes a metal plate body and an insulating coating, the insulating coating covering the surface of the metal plate body.

[0040] Optionally, the insulating coating can be applied to all or part of the surface of the metal plate. When the insulating coating is applied to part of the surface of the metal plate, it can be applied only to the locations where insulation from other electrical components is required, while locations farther away from other electrical components may not be coated. The metal plate can provide good electromagnetic interference shielding for the main control board 200, and the insulating coating can achieve insulation of the surface of the shielding plate 300, thereby appropriately reducing the distance between the shielding plate 300 and other electrical components inside the housing 100, thus reducing the waste of internal space in the housing 100.

[0041] Optionally, the insulating coating can be an epoxy resin coating. Epoxy resin materials have good high-temperature resistance and insulation properties, and a long service life, which helps to improve the reliability of the shielding plate 300. During processing, the epoxy resin coating can be applied to the surface of the metal plate by spraying or electrophoresis. Optionally, the metal plate can be a steel plate or an aluminum plate. The thickness of the metal plate can be 1.0mm to 1.8mm. While ensuring the structural strength of the shielding plate 300, reducing the thickness of the shielding plate 300 can further reduce the weight of the motor controller.

[0042] Furthermore, the shielding plate 300 includes a substrate 310, a first folded edge 320 connected to the long side of the substrate 310, and a second folded edge 330 connected to the long side of the first folded edge 320. The first folded edge 320 and the substrate 310 are connected at an angle, and the second folded edge 330 is parallel to the substrate 310. A second mounting hole 331 and a protrusion 332 are disposed on the second folded edge 330. The substrate 310 and the bottom plate 130 of the housing 100 are spaced apart.

[0043] Optionally, the substrate 310 has a rectangular plate structure. This structure is versatile and does not impose structural shape limitations on the electrical components mounted on the substrate 310, as long as the space dimensions are suitable. Furthermore, by providing a first folded edge 320 on the long side of the substrate 310, a gap can be created between the substrate 310 and the base plate 130 of the housing 100, thus maintaining a certain electrical clearance and preventing electrical problems such as electric field breakdown caused by the substrate 310 and housing 100 being too close. The second folded edge 330 facilitates the connection between the shielding plate 300 and the housing 100. Optionally, the included angle between the first folded edge 320 and the substrate 310 can be 90°, 120°, or 150°, depending on the application requirements. Understandably, the width of the first folded edge 320 is set according to the application requirements. Reducing the height of the first folded edge 320 while ensuring sufficient electrical clearance is beneficial for miniaturizing the motor controller.

[0044] Understandably, the second folded edge 330 and the substrate 310 are arranged parallel to each other, which ensures that the shielding plate 300 can be stably attached to the bottom plate 130 of the housing 100. The width of the second folded edge 330 is set according to the usage requirements. While ensuring that the second folded edge 330 has sufficient strength, the width of the second folded edge 330 is reduced to reduce the space occupied by the shielding plate 300 inside the housing 100.

[0045] Figure 2 A schematic diagram of the structure of the shielding plate 300 according to an embodiment of the present invention is shown. Figure 3 for Figure 2 A magnified view of a portion at point A. Further, see... Figure 2 and Figure 3 The first folded edge 320 is stamped with a second groove 321.

[0046] By stamping the second groove 321 into the second fold 330, the strength of the second fold 330 can be increased, preventing the second fold 330 from tilting after long-term use, which would cause the substrate 310 to shift position, thereby avoiding problems such as reduced electrical clearance and misalignment of the main control board 200.

[0047] Further, see also Figure 3 Multiple concave and convex chamfer structures 340 are provided at the connection between the first fold 320 and the second fold 330.

[0048] By adding a chamfered structure 340 between the first fold 320 and the second fold 330, the structural strength at the connection between the first fold 320 and the second fold 330 can be increased, which can also prevent the second fold 330 from tilting.

[0049] Furthermore, a third groove 313 can be formed by stamping along the edge of the shielding plate 300 in the width direction.

[0050] This method increases the strength and stiffness at the edge of the shielding plate 300, thereby reducing resonance.

[0051] Optionally, this embodiment employs an optimization method to design an optimal indentation distribution scheme, which can effectively improve the modal frequency, resulting in a significant optimization effect on the first-order modal frequency, reaching 450Hz, which can effectively improve the resonance problem.

[0052] Furthermore, this technical solution also provides a vehicle including the aforementioned motor controller.

[0053] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A motor controller, characterized in that, include: Casing (100); The main control board (200) is disposed inside the housing (100); A shielding plate (300) is located between the bottom plate (130) of the housing (100) and the main control board (200). The shielding plate (300) is provided with a first mounting hole (311) for connecting with the main control board (200). A first groove (312) is stamped in the middle of the shielding plate (300), and the first mounting hole (311) is located on the first groove (312). A second mounting hole (331) is provided on the edge of the shielding plate (300) in the length direction. The shielding plate (300) is connected to the bottom of the housing (100) through the second mounting hole (331). A protrusion (332) is stamped on the edge of the shielding plate (300) in the length direction. The protrusion (332) and the second mounting hole (331) are spaced apart.

2. The motor controller according to claim 1, characterized in that, The shielding plate (300) includes a base plate (310), a first folded edge (320) connected to the long side of the base plate (310), and a second folded edge (330) connected to the long side of the first folded edge (320). The first folded edge (320) and the base plate (310) are connected at an angle. The second folded edge (330) and the base plate (130) are parallel. The second mounting hole (331) and the protrusion (332) are disposed on the second folded edge (330). The base plate (310) and the bottom plate (130) of the housing (100) are spaced apart.

3. The motor controller according to claim 2, characterized in that, The connection between the first folded edge (320) and the second folded edge (330) is provided with a plurality of concave and convex chamfer structures (340).

4. The motor controller according to claim 2, characterized in that, The first fold (320) is stamped with a second groove (321).

5. The motor controller according to any one of claims 1-4, characterized in that, The main control board (200) is connected to the first mounting hole (311) by the first bolt.

6. The motor controller according to any one of claims 1-4, characterized in that, The housing (100) is connected by a second bolt and a second mounting hole (331).

7. The motor controller according to any one of claims 1-4, characterized in that, The shielding plate (300) has a third groove (313) stamped on its width-direction edge.

8. The motor controller according to any one of claims 1-4, characterized in that, The shielding plate (300) includes a metal plate and an insulating coating, the insulating coating covering the surface of the metal plate.

9. The motor controller according to claim 8, characterized in that, The insulating coating is an epoxy resin coating.

10. A vehicle, characterized in that, Includes the motor controller according to any one of claims 1-9.

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