Controller

Abstract

The utility model discloses a controller. The controller comprises a bottom plate; the radiator is located on the bottom plate and connected with the bottom plate; the shell is provided with a top surface and a side wall arranged around the top surface, and the top surface of the shell is connected with the upper surface of the radiator; the circuit board is located on the top surface of the shell, a wiring terminal is arranged on the first surface of the circuit board, the second surface of the circuit board is arranged opposite to the top surface of the shell, and the circuit board is embedded into the shell; the conductive connecting piece is located between the circuit board and the top surface of the shell, one end of the conductive connecting piece is connected with the top surface of the shell and electrically connected with the radiator, and the other end of the conductive connecting piece is connected with the ground end of the circuit board; the ground end of the circuit board is connected with the ground wire through the conductive connecting piece, the radiator and the bottom plate. The controller has relatively high product consistency and reliability.

Description

Technical Field

[0001] The utility model relates to the field of control technology, and more particularly to a controller for motor driving. Background Art

[0002] With the advancement of domestic energy conservation and emission reduction, variable frequency controllers are increasingly used in various industries. As products are mass-produced, higher requirements are placed on product costs. We must continue to apply existing mature production processes within the original traditional structure to simplify production links, improve production efficiency, and reduce production costs.

[0003] The internal grounding of existing controllers on the market is usually achieved by wiring harness connection, which is a complex process and has low reliability.

[0004] Therefore, a new type of controller is proposed to reduce the difficulty of assembly, reduce the number of wires of the controller and improve the reliability of the product. Utility Model Content

[0005] The purpose of the utility model is to provide a controller to solve the problems of the existing controller having too many wiring harnesses, complex processes, low reliability, etc., so as to reduce the difficulty of assembly and improve product consistency and reliability.

[0006] The utility model provides a controller, comprising: a base plate; a radiator, located on the base plate, the radiator being connected to the base plate; a shell, the shell having a top surface and side walls arranged around the top surface, the top surface of the shell being connected to the upper surface of the radiator; a circuit board, located on the top surface of the shell, the first surface of the circuit board being provided with connection terminals, the second surface of the circuit board being arranged opposite to the top surface of the shell, the circuit board being embedded in the shell; a conductive connecting member, located between the circuit board and the top surface of the shell, one end of the conductive connecting member being connected to the top surface of the shell and electrically connected to the radiator, and the other end of the conductive connecting member being connected to the ground end of the circuit board; the base plate being connected to a ground wire, and the ground end of the circuit board being connected to the ground wire through the conductive connecting member, the radiator and the base plate.

[0007] Optionally, a capacitor is provided on the second surface of the circuit board, the top surface of the housing has a first through hole corresponding to the capacitor, and the capacitor at least partially passes through the first through hole and extends below the top surface of the housing.

[0008] Optionally, the capacitor includes a plurality of capacitors, and the plurality of capacitors are arranged along a linear array.

[0009] Optionally, the housing further includes a partition, which is perpendicular to the top surface of the housing and separates the heat sink from the capacitor.

[0010] In the above-mentioned controller, the conductive connecting member is provided with a positioning hole, and the upper surface of the housing is further provided with a positioning post, and the conductive connecting member is positioned through the positioning hole and the positioning post.

[0011] In the controller described above, a connection column is further provided on one side edge of the base plate, and the connection column is electrically connected to the ground wire.

[0012] Optionally, a grounding plate is further included, one side of which has a second through hole corresponding to the connecting column, the grounding plate is connected to the bottom plate, and the other side of the grounding plate is provided with a grounding connection hole.

[0013] Optionally, one end of the conductive connector has a third through hole, and a fourth through hole is provided at a position on the circuit board corresponding to the third through hole, and a screw passes through the third through hole and the fourth through hole to achieve electrical connection between the ground end of the circuit board and the conductive connector.

[0014] Optionally, the other end of the conductive connector has a fifth through hole, a sixth through hole is provided on the top surface of the shell at a position corresponding to the fifth through hole, a connecting hole is provided on the radiator at a position corresponding to the sixth through hole, and a screw passes through the fifth through hole, the sixth through hole and the connecting hole to realize electrical connection between the conductive connector and the radiator.

[0015] Optionally, the lower end portion of the heat dissipating fin of the radiator is folded inward, and a second connecting hole is provided in the folded portion of the heat dissipating fin. A seventh through hole corresponding to the second connecting hole is provided on the base plate, and a screw passes through the second connecting hole and the seventh through hole to realize electrical connection between the radiator and the base plate.

[0016] Optionally, the conductive connection member connects the ground terminal of the circuit board and the heat sink through portions extending vertically downward and laterally.

[0017] Optionally, the connecting column on the base plate is a stud, and the ground wire is fixed to the stud by a screw to achieve grounding of the base plate.

[0018] Optionally, a pressing plate is provided on the ground connection hole on the other side of the grounding plate, and the ground wire is fixed to the grounding plate through the pressing plate and screws to achieve grounding of the grounding plate.

[0019] Optionally, the shell is an insulating shell.

[0020] The above-mentioned controller further includes a fan, which is located in the housing and is arranged opposite to the radiator.

[0021] Optionally, the fan and the radiator are located on the same side of the partition.

[0022] Optionally, the shell is provided with an air inlet hole on a side where the fan is located, and the shell is provided with a heat dissipation hole on the other side opposite to the fan.

[0023] Optionally, a relay and a power converter are further provided on the first surface of the circuit board, and a capacitor and a power module are provided on the second surface of the circuit board.

[0024] In the controller described above, the top surface of the shell has a through hole, the through hole corresponds to the power module, and the power module is connected to the heat sink through the through hole.

[0025] The controller provided by this utility model utilizes a conductive connector to achieve an electrical connection between the ground terminal (grounding hole) of the top circuit board and the bottom board. This improves the design of the product housing and overall layout, preventing the connection wires from being connected inside the inverter. If the internal wiring is interrupted, the grounding of the housing and circuit board could be interrupted, posing an electrical risk to the user. The controller is also dustproof and has excellent heat dissipation capabilities. This controller not only simplifies and optimizes the overall structure, improving production efficiency, reducing production costs, and facilitating user installation and use, but also ensures reliable controller grounding and facilitates user wiring.

[0026] Specifically, the conductive connector utilizes the screws securing the circuit board, heat sink, and baseplate to connect them, saving assembly steps and time. This design also places the ground wire outside the controller, saving space inside. This simplifies the fan assembly process, allowing the fan to be secured using brackets within the controller, saving materials and labor. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and other objects, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings.

[0028] Figure 1 An exploded schematic diagram of a controller according to an embodiment of the present invention is shown;

[0029] Figure 2 A schematic diagram showing a conductive connecting member in a controller according to an embodiment of the present utility model is shown;

[0030] Figure 3 A partial enlarged schematic diagram of area A in the exploded view of the controller according to an embodiment of the present utility model is shown;

[0031] Figure 4 A schematic diagram of a grounding plate in a controller according to an embodiment of the present utility model is shown;

[0032] Figure 5 A partial enlarged schematic diagram of area B in the exploded view of the controller according to an embodiment of the present utility model is shown;

[0033] Figure 6 A bottom view schematically shows an exploded view of a controller according to an embodiment of the present invention;

[0034] Figure 7 A schematic diagram of an assembled controller according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0035] The present invention will be described in more detail below with reference to the accompanying drawings. In each of the accompanying drawings, identical elements are represented by similar reference numerals. For the sake of clarity, the various parts in the accompanying drawings are not drawn to scale. In addition, some well-known parts may not be shown.

[0036] It should be understood that when describing a structure, when a component or module is referred to as being "in front of" another component or module, it can mean that it is directly located in front of and connected to the circuit of the other component or module, or that other components or modules are included between it and the other component or module. Furthermore, if there are some modules, their positions and adjacencies can be adjusted as needed.

[0037] If it is intended to describe a situation where a component or module is directly before another component or module, this document will use the expression “directly before” or “before and adjacent to”.

[0038] The following describes many specific details of some embodiments of the present invention, such as the specific circuit composition of the modules, component models, quantities, and connection relationships, to provide a clearer understanding of the present invention. However, as those skilled in the art will appreciate, the present invention can be implemented without following these specific details.

[0039] The present invention may be embodied in various forms, some examples of which will be described below.

[0040] Figure 1An exploded schematic diagram of a controller according to an embodiment of the present invention is shown; the controller includes: a base plate 100, a heat sink 200, a shell 300 and a circuit board 400, wherein the base plate 100 and the heat sink 200 are both made of metal, for example, and the shell 300 is made of insulating material. A seventh through hole 120 is provided on the base plate 100, and a screw passes through the seventh through hole 120 from the bottom of the base plate 100 and is connected to the second connecting hole below the heat sink 200, thereby achieving a fixed connection and an electrical connection between the heat sink 200 and the base plate 100; a connecting column 110 is also provided on one side of the base plate 100, and there are two connecting columns 110, for example, and the ground wire can be connected to the base plate 100 through the connecting column 110. The heat sink 200 is positioned on the base plate 100. A first connection hole 210 is provided on the top surface of the heat sink 200. An array of cooling fins is disposed below the top surface of the heat sink 200. The two outermost cooling fins are folded inward below the bottom of the heat sink 200, forming a second connection hole below the heat sink 200 on the folded surface. The housing 300 includes a rectangular top surface 310 and four side walls surrounding the top surface 310. The top surface 310 of the housing 300 is, for example, slightly lower than the upper end surfaces of the side walls to allow space for the circuit board 400 to be inserted into the housing 300. Sixth through holes 311 are provided on the top surface 310. Screws pass through these sixth through holes 311 to connect to the first connection holes 210 on the top surface of the heat sink 200. For example, the top surface of the housing 300 has four sixth through holes 311 corresponding to the four first connection holes 210 on the top of the heat sink 200. Furthermore, a first through hole 312 is provided on one side of the top surface 310. The first through hole 312 allows the capacitor 420 on the lower surface of the circuit board 400 to pass through, allowing the capacitor 420 to at least partially extend into the housing 300. The upper surface 310 is also provided with a through hole 313. The lower surface of the circuit board 400 is also provided with a chip or power module, for example, which corresponds to the through hole 313. The chip can be connected to the upper surface of the heat sink 200 through the through hole 313 to achieve better heat dissipation. A fan 700 is also provided in the housing 300. The fan 700 corresponds to the direction of the heat sink 200 fins, for example. The side wall of the housing 300 corresponding to the fan 700 has an air inlet, and the other opposite side wall is provided with an air outlet. The upper surface of the circuit board 400 is provided with a terminal block 410. For example, a relay and a power converter are also provided on the upper surface of the circuit board 400. The size of the circuit board 400 corresponds to the top surface of the housing 300. A conductive connector 500 is also provided between the circuit board 400 and the top surface 310. A third through hole is provided at one end of the conductive connector 500, which is connected to the ground terminal (fourth through hole) of the circuit board 400 through a fixing screw 401 at a corner of the circuit board 400.The other end of the conductive connector 500 is provided with a fifth through-hole, which is electrically connected to the heat sink 200 via a screw connected to the top surface 310 of the housing 300. Specifically, one end of the conductive connector 500 corresponds to a fixing screw at a corner of the circuit board 400, while the other end extends laterally to one of the sixth through-holes 311 on the top surface. The screw passes through the sixth through-hole 311 and connects to the first connection hole 210 on the top surface of the heat sink 200. This conductive connector 500 electrically connects the ground terminal of the circuit board 400 to the heat sink 200 and the base plate 100. The two sidewalls of the housing 300 also have outwardly folded sides. One of the folded sides is provided with an eighth through-hole 320 corresponding to the connecting post 110, which can be inserted into the eighth through-hole 320. The base plate 100 is secured to the housing 300 by connecting to the heat sink 200 from the upper and lower surfaces, simplifying the connection. Furthermore, the connecting column 110 is, for example, a stud, and the controller also includes a grounding plate 600. One side of the grounding plate 600 is connected to the connecting column 110 of the base plate 100 by a screw passing through the eighth through hole 320 of the shell 300. The other side of the grounding plate 600 is provided with a screw and a pressing plate, and the ground wire is electrically connected to the grounding plate 600 through the pressing plate and the screw.

[0041] Figure 2 A schematic diagram showing a conductive connecting member in a controller according to an embodiment of the present utility model is shown; Figure 3 A partial enlarged schematic diagram of area A in the exploded diagram of the controller of the embodiment of the present invention is shown; see Figure 2 The conductive connector 500 is, for example, in the shape of a strip. The third through hole at one end of the conductive connector 500 is located below the fourth through hole of the circuit board 400. It then has a portion extending vertically downward and laterally. A fifth through hole is provided at the other end of the conductive connector 500. A screw can pass through the fifth through hole and a sixth through hole 311 on the top surface 310 of the shell 300 opposite to the fifth through hole to connect to a first connection hole 210 corresponding to the radiator 200. When the circuit board 400 is fixed by screws 401, screws 401 electrically connect the grounding hole (fourth through-hole) of the circuit board 400 to the third through-hole at one end of the conductive connector 500. When the top surface 310 is connected to the heat sink 200 by screws 301, the fifth through-hole at the other end of the conductive connector 500 is electrically connected to the heat sink 200 via screws 301. Since the heat sink 200 is connected to the base plate 100, the ground terminal of the circuit board 400 is electrically connected to the base plate 100. The ground wire can be connected to the ground terminal of the circuit board 400 by connecting to the connecting column 110 of the base plate 100. The laterally extending portion of the conductive connector 500 is also provided with a positioning hole 510, see Figure 3The top surface 310 has positioning posts 314, and the conductive connector 500 is positioned by the positioning holes 510 and the positioning posts 314. This design simplifies the fixing of the conductive connector 500. Compared with wires, the conductive connector 500 is easier to install and place. The electrical connections at both ends reuse the fixing screws, saving assembly time and materials.

[0042] Figure 4 A schematic diagram of a grounding plate in a controller according to an embodiment of the present utility model is shown; Figure 5 The diagram shows a partial enlarged schematic diagram of the area B in the exploded view of the controller according to the present invention; the grounding plate 600 is, for example, a rounded rectangular sheet. The grounding plate allows the grounding wire to be set outside the housing 300, saving space inside the controller. A second through hole is provided on one side edge of the grounding plate 600, which is connected to the grounding plate 600 by screws 610. Figure 5 The connecting column 110 of the base plate 100 is shown as being connected; a pressing plate 621 and a screw 620 are provided on the other side edge of the grounding plate 600. The ground wire can be pressed by the pressing plate 621 and fixed to the grounding plate 600 by tightening the screw 620 to achieve electrical connection.

[0043] Figure 6 FIG. 1 is a bottom view of an exploded view of a controller according to an embodiment of the present invention; FIG. Figure 6 As shown, a partition 330 is further provided in the housing 300, which divides the interior of the housing 300 into two independent spaces. The radiator 200 is located on one side of the partition 330, and the capacitor 420 is located on the other side of the partition 330. On the side where the radiator 200 is located, a bracket 340 is further provided in the housing 300, and the fan 700 is arranged in the housing 300 via the bracket 340. Between the base plate 100 and the radiator 200, screws are inserted from the bottom of the base plate 100 through the seventh through hole 120 and connected to the second connection hole 220 below the radiator 200, thereby achieving a fixed connection and electrical connection between the base plate 100 and the radiator 200.

[0044] Figure 7 The figure shows a schematic diagram of an assembled controller according to an embodiment of the present invention. The controller's circuit board 400 is embedded in a housing 300. Terminals 410 are provided on the upper surface of the circuit board 400. The housing 300 completely covers the base plate 100. A ground plate 600 is also provided at the bottom of one side of the housing 300. This ground plate 600 is connected to a ground wire, which is electrically connected to the ground terminal (fourth through hole) of the circuit board 400 through the ground plate 600, the base plate 100, the heat sink 200, and the conductive connector 500.

[0045] The controller provided by this utility model utilizes a conductive connector to achieve an electrical connection between the ground terminal (grounding hole) of the top circuit board and the bottom board. This improves the design of the product housing and overall layout, preventing the connection wires from being connected inside the inverter. If the internal wiring is interrupted, the grounding of the housing and circuit board could be interrupted, posing an electrical risk to the user. The controller is also dustproof and has excellent heat dissipation capabilities. This controller not only simplifies and optimizes the overall structure, improving production efficiency, reducing production costs, and facilitating user installation and use, but also ensures reliable controller grounding and facilitates user wiring.

[0046] Specifically, the conductive connector utilizes the screws securing the circuit board, heat sink, and baseplate to connect them, saving assembly steps and time. This design also places the ground wire outside the controller, saving space inside. This simplifies the fan assembly process, allowing the fan to be secured using brackets within the controller, saving materials and labor.

[0047] In the above description, technical details such as the position combination and connection method of each component are not described in detail. However, those skilled in the art will understand that various technical means can be used to form the required connection relationship, etc. In addition, in order to achieve the same function, those skilled in the art may also design a structure that is not exactly the same as the structure described above. In addition, although each embodiment is described separately above, this does not mean that the measures in each embodiment cannot be used in combination to advantage.

[0048] The above describes embodiments of the present invention. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. The scope of the present invention is defined by the appended claims and their equivalents. Those skilled in the art may make various substitutions and modifications without departing from the scope of the present invention, and such substitutions and modifications are intended to fall within the scope of the present invention.

Claims

1. A controller, characterized in that: include: base plate; A radiator is located on the bottom plate and is connected to the bottom plate; a housing, the housing having a top surface and side walls arranged around the top surface, the top surface of the housing being connected to the upper surface of the radiator; a circuit board, located on the top surface of the housing, wherein the first surface of the circuit board is provided with connection terminals, the second surface of the circuit board is arranged opposite to the top surface of the housing, and the circuit board is embedded in the housing; a conductive connector located between the circuit board and the top surface of the housing, one end of the conductive connector being connected to the top surface of the housing and electrically connected to the heat sink, and the other end of the conductive connector being connected to the ground terminal of the circuit board; The bottom plate is connected to a ground line, and the ground end of the circuit board is connected to the ground line through the conductive connector, the heat sink, and the bottom plate.

2. The controller according to claim 1, characterized in that A capacitor is provided on the second surface of the circuit board, and the top surface of the housing has a first through hole corresponding to the capacitor. The capacitor at least partially passes through the first through hole and extends below the top surface of the housing.

3. The controller according to claim 2, characterized in that The capacitors include a plurality of capacitors arranged along a linear array.

4. The controller according to claim 3, characterized in that The housing further includes a partition, which is perpendicular to the top surface of the housing and separates the heat sink from the capacitor.

5. The controller according to claim 1, wherein: A positioning hole is provided on the conductive connecting member, and a positioning column is further provided on the upper surface of the shell. The conductive connecting member is positioned through the positioning hole and the positioning column.

6. The controller according to claim 1, characterized in that A connecting column is further provided on one side edge of the bottom plate, and the connecting column is electrically connected to the ground wire.

7. The controller according to claim 6, characterized in that It also includes a grounding plate, one side of which has a second through hole corresponding to the connecting column, the grounding plate is connected to the bottom plate, and the other side of the grounding plate is provided with a grounding connecting hole.

8. The controller according to claim 1, wherein: One end of the conductive connector has a third through hole, and a fourth through hole is provided on the circuit board at a position corresponding to the third through hole. A screw passes through the third through hole and the fourth through hole to achieve electrical connection between the ground end of the circuit board and the conductive connector.

9. The controller according to claim 1, wherein: The other end of the conductive connector has a fifth through hole, a sixth through hole is provided on the top surface of the shell at a position corresponding to the fifth through hole, a first connection hole is provided on the radiator at a position corresponding to the sixth through hole, and a screw passes through the fifth through hole, the sixth through hole and the first connection hole to achieve electrical connection between the conductive connector and the radiator.

10. The controller according to claim 9, characterized in that The lower end portion of the heat dissipation fin of the radiator is folded inward, and a second connecting hole is provided in the folded portion of the heat dissipation fin. A seventh through hole corresponding to the second connecting hole is provided on the base plate, and a screw passes through the second connecting hole and the seventh through hole to realize electrical connection between the radiator and the base plate.

11. The controller according to claim 1, wherein: The conductive connection connector connects the ground end of the circuit board and the heat sink through the portion extending vertically downward and laterally.

12. The controller according to claim 7, characterized in that The connecting column on the bottom plate is a stud, and the ground wire is fixed to the stud by a screw to achieve grounding of the bottom plate.

13. The controller according to claim 7, characterized in that A pressing plate is provided on the ground connection hole on the other side of the ground plate, and the ground wire is fixed to the ground plate through the pressing plate and screws to achieve grounding of the ground plate.

14. The controller according to claim 1, wherein: The shell is an insulating shell.

15. The controller according to claim 4, characterized in that A fan is also included. The fan is located in the housing and is arranged opposite to the radiator.

16. The controller according to claim 15, characterized in that The fan and the radiator are located on the same side of the partition.

17. The controller according to claim 16, characterized in that The shell is provided with an air inlet hole on a side where the fan is located, and the shell is provided with a heat dissipation hole on the other side opposite to the fan.

18. The controller according to claim 1, wherein: The first surface of the circuit board is further provided with a relay and a power converter, and the second surface of the circuit board is provided with a capacitor and a power module.

19. The controller according to claim 18, characterized in that The top surface of the shell has a through hole, the through hole corresponds to the power module, and the power module is connected to the heat sink through the through hole.

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