Motor controller

Abstract

The utility model discloses a motor controller, which comprises a shell, a circuit board and a binding post, the circuit board is positioned in the shell, the binding post is connected with the circuit board, and the binding post is provided with a connecting end connected with a large-current conductor; and the limiting structure comprises a limiting part arranged on the binding post and a mounting part which is arranged on the shell and / or the circuit board and is matched with the limiting part. According to the utility model, the circuit board area occupied by the binding post is greatly reduced, the circuit board area can be effectively reduced, and the cost is saved.

Description

Technical Field

[0001] The utility model relates to a controller, in particular to a motor controller. Background Art

[0002] A motor controller is a device that actively controls a motor to operate in accordance with set directions, speeds, angles, and response times. In a motor controller, electrical connection points are provided so that wires can be connected to the device or other electrical components. The controller terminal plays a crucial role in the motor controller. Currently, most of the controller terminals on the market are simply cylindrical, and such terminals cannot withstand large torques. Since the motor controller requires a large current, power cables, motor phase lines, and other cables are relatively thick, and a large torque is required during connection to reliably connect the power cable and the motor phase line to the terminal through screws or bolts. If the torque is small, the screw may not be tightened, and excessive resistance may occur between the contact surface of the terminal and the terminal block, resulting in the terminal being burned out, posing a safety risk. If the torque is too large, the terminal may rotate together with the screw or bolt, causing the soldering between the circuit board and the terminal to become loose, resulting in a connection failure.

[0003] For example, Chinese Patent Document CN104882683A discloses a method for preventing the rotation of the terminal of an electric vehicle controller and the anti-rotation terminal used. The present invention uses an anti-rotation terminal as the mechanical and electrical connection body for connecting the power output module, the main control circuit board A, and the external large-current conductor to prevent the technical problem that the anti-rotation terminal rotates together with the fixing screw when connecting or disconnecting the external large-current conductor, causing the anti-rotation terminal to become loose. The present invention has well solved the technical problem that when tightening the screw or bolt, the terminal rotates together with the screw or bolt, causing the terminal to become loose, resulting in a connection failure between the terminal and the circuit board and unable to ensure the product quality; it has solved the problem of large-current connection for the controller to achieve a modular and standardized structure, laying a foundation for the full automation of the production and testing of the controller. The present invention is applicable to the production and manufacturing improvement of electric two-wheel vehicles, electric three-wheel vehicles, and electric vehicle controllers. However, the "Z"-shaped anti-rotation terminal used in this prior art occupies a large area on the circuit board, making the circuit board layout inflexible, and it requires screws or bolts for fixation, with many components, a complex structure, and inconvenient installation. Summary of the Utility Model

[0004] The present utility model aims to solve the technical problem that the anti-rotation terminal in the prior art occupies a large area on the circuit board, and provides a motor controller, which includes a housing, a circuit board and a terminal. The circuit board is located inside the housing, and the terminal is connected to the circuit board. The terminal is provided with a connection end for connecting to a large current conductor. Among them: it further includes a limiting structure for preventing the terminal from rotating. The limiting structure includes a limiting portion provided on the terminal and an installation portion provided on the housing and / or the circuit board that cooperates with the limiting portion.

[0005] In this solution, the freedom degree of the terminal is restricted by the cooperation between the limiting portion on the terminal and the installation portion on the housing or the circuit board, thereby preventing the problem that the terminal rotates together with the screw or bolt when the torque is large. Compared with the "Z"-shaped terminal in the prior art, the area of the circuit board occupied by the terminal in this solution is greatly reduced, which can effectively reduce the area of the circuit board and save costs.

[0006] Preferably, the limiting portion is a non-cylindrical boss or a non-circular groove, and the installation portion is a non-circular groove or a non-cylindrical boss. In this solution, the anti-rotation function is achieved through the cooperation between the non-cylindrical boss and the non-circular groove, and the structure is simple.

[0007] Preferably, multiple groups of limiting structures are provided. The setting of multiple groups of limiting structures in this solution can strengthen the anti-rotation function.

[0008] Preferably, the terminal is provided with a polygonal base. This solution can increase the contact area between the terminal and the circuit board and improve the welding firmness.

[0009] Preferably, the circuit board is provided with a polygonal installation groove that cooperates with the polygonal base. In this solution, the anti-rotation function is also achieved by the cooperation between the polygonal installation groove and the base of the terminal, thereby improving the overall anti-rotation effect of the motor controller.

[0010] Preferably, the connection end is connected to the large current conductor through a fastener. This solution can ensure the firm connection between the terminal and the large current conductor.

[0011] The present utility model has the following beneficial effects:

[0012] 1. Compared with other anti-rotation terminals, the area of the circuit board occupied by this terminal is greatly reduced, which can effectively reduce the area of the circuit board and save costs;

[0013] 2. Through the cooperation between the polygonal boss on the upper part of the terminal and the limiting groove of the housing, the circuit board and the housing are used together to prevent the rotation problem of the terminal, and it can withstand a greater torque

[0014] 3. The polygonal base of the terminal increases the contact area between the terminal and the circuit board, and it is more firm after welding; and it can play an anti-rotation function, thereby improving the overall anti-rotation effect of the motor controller

[0015] 4. Compared with other anti-rotation terminal posts on the market, the structure of this terminal post is simpler, facilitating processing; it has fewer parts and is more convenient to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the terminal post in Embodiment 1 of the motor controller of the present utility model;

[0017] Figure 2 It is a schematic diagram after the terminal post, the housing and the circuit board are installed;

[0018] Figure 3 It is a schematic diagram after the terminal post, the housing and the circuit board are installed in Embodiment 2;

[0019] Figure 4 It is a schematic diagram after the terminal post, the housing and the circuit board are installed in Embodiment 3;

[0020] Figure 5 It is a schematic diagram of various structures of the limiting structure. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following is a further detailed description through specific embodiments:

[0022] 1. Definitions

[0023] Circuit board: It is a basic electronic component used to build and arrange circuit components with circuit diagrams. It realizes functions such as layout design of complex circuits and electrical signal transmission in electrical and electronic devices by connecting electronic components and circuits together.

[0024] Large-current conductor: It refers to a conductor that can withstand a large current and conduct current through it.

[0025] Conductor: It refers to a substance with a very small resistivity and is easy to conduct current.

[0026] 2. The reference numerals in the drawings of the specification include: terminal post 1, connection end 2, threaded hole 3, polygonal base 4, limiting part, housing 6, circuit board 7.

[0027] Embodiment 1

[0028] Basically as shown in the attached Figure 1 and Figure 2 shown: The motor controller includes a housing 6, a circuit board 7 and a terminal post 1. The circuit board 7 is located inside the housing 6. The terminal post 1 is connected to the circuit board 7. The terminal post 1 is provided with a polygonal base 4, and the polygonal base 4 is welded to the circuit board 7.

[0029] The terminal post 1 is provided with a connection end 2 for connecting with a large-current conductor. The connection end 2 is connected to the large-current conductor through a fastener. A threaded hole 3 is opened in the connection end 2, and the fastener uses a bolt. The connection end 2 is connected to the large-current conductor through the bolt.

[0030] It further includes a limiting structure for preventing the terminal 1 from rotating. The limiting structure includes a limiting portion provided on the terminal 1 and a mounting portion provided on the housing 6 and / or the circuit board 7 and cooperating with the limiting portion. Specifically, the limiting portion is a non-cylindrical boss or a non-circular groove, and the mounting portion is a non-circular groove or a non-cylindrical boss. Multiple groups of limiting structures can also be provided. In this embodiment, two groups of limiting structures are provided. One group of limiting structures includes a hexagonal boss provided on the upper part of the terminal 1 and a hexagonal groove provided on the housing 6. One group of limiting structures is a hexagonal boss provided in the middle of the terminal 1 and a hexagonal groove provided on the circuit board 7.

[0031] Embodiment 2

[0032] The difference from Embodiment 1 is that, as Figure 3 shown, in this embodiment, only one group of limiting structures and the circuit board 7 are provided. One group of limiting structures includes a hexagonal boss provided on the upper part of the terminal 1 and a hexagonal groove provided on the housing 6.

[0033] Embodiment 3

[0034] The difference from Embodiment 2 is that, as Figure 4 shown, in this embodiment, the circuit board 7 is provided with a polygonal mounting groove cooperating with the polygonal base 4. The "polygon" in the limiting structure can also be a quadrilateral or other irregular shapes, as Figure 5 shown.

[0035] The above are only the embodiments of the present utility model. Specific structures and common knowledge such as characteristics in the prior art are not described in detail herein. Those of ordinary skill in the art know all the common general technical knowledge in the technical field to which the utility model belongs before the application date or the priority date, can know all the existing technologies in this field, and have the ability to apply the conventional experimental means before this date. Those of ordinary skill in the art can, under the inspiration given in this application, complete and implement this solution in combination with their own abilities. Some typical well-known structures or well-known methods should not become obstacles for those of ordinary skill in the art to implement this application. It should be noted that for those skilled in the art, without departing from the structure of the present utility model, several deformations and improvements can still be made, and these should also be regarded as the protection scope of the present utility model, and these will not affect the implementation effect of the present utility model and the practicability of the patent. The protection scope required by this application should be based on the content of its claims, and the specific implementation manners and the like recorded in the specification can be used to interpret the content of the claims.

Claims

1. A motor controller, comprising a housing, a circuit board and a terminal, wherein the circuit board is located in the housing, the terminal is connected to the circuit board, and the terminal is provided with a connection terminal connected to a high current conductor; characterized in that: It also includes a limiting structure for preventing the terminal from rotating, and the limiting structure includes a limiting portion provided on the terminal and a mounting portion provided on the housing and / or the circuit board and cooperating with the limiting portion.

2. The motor controller according to claim 1, characterized in that: The limiting portion is a non-cylindrical boss or a non-circular groove, and the mounting portion is a non-circular groove or a non-cylindrical boss.

3. The motor controller according to claim 2, characterized in that: The limiting structures are provided in multiple groups.

4. The motor controller according to any one of claims 1 to 3, characterized in that: The terminal post is provided with a polygonal base.

5. The motor controller according to claim 4, characterized in that: The circuit board is provided with a polygonal mounting groove matched with the polygonal base.

6. The motor controller according to claim 5, characterized in that: The connection end is connected to the high-current conductor through a fastener.

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