Golf cart controller

Abstract

The application discloses a golf cart controller, which comprises a heat dissipation bottom plate, a driving plate, a control plate, an upper cover and a fuse, positive and negative electrode connecting posts and three phase wire connecting posts are fixed on the driving plate through soldering, the positive and negative electrode connecting posts comprise a positive electrode connecting post and a negative electrode connecting post, an A area power capacitor and a B area power capacitor are arranged on the control plate, the A area power capacitor and the B area power capacitor are separately arranged on left and right sides of the control plate, and a spacing is arranged between the A area power capacitor and the B area power capacitor. The application has the advantages of high working reliability.

Description

Technical Field

[0001] This invention relates to the field of control components technology, and in particular to a golf cart controller. Background Technology

[0002] For example, the controllers used in golf carts typically have high power ratings, especially since their circuitry often features multiple sets of high-power capacitors. Figure 3 As shown, the power capacitor 300 is concentrated on one side of the circuit board. When the power devices switch alternately, it is prone to voltage drop and heat generation. At the same time, parasitic inductance and resistance will affect the dynamic response speed of the circuit. In addition, the driver board and control board of traditional controllers are mostly laid flat, which has low heat dissipation efficiency. After the terminals heat up, it is difficult to quickly conduct heat. Moreover, the built-in fuse is inconvenient to replace and maintain, and the temperature protection mechanism has a lag in response, which seriously affects the reliability and service life of the controller. Summary of the Invention

[0003] To address the shortcomings of the existing technology, the present invention aims to provide a golf cart controller that shortens the electrical path, thereby achieving higher operational reliability.

[0004] The technical solution adopted in this invention is: a golf cart controller, including a heat dissipation base plate, a drive board, a control board, a top cover, and a fuse. The drive board has positive and negative terminals and three phase terminals fixed by soldering. The positive and negative terminals include one positive terminal and one negative terminal. The control board has an A-zone power capacitor and a B-zone power capacitor, which are located on the left and right sides of the control board, respectively, and there is a gap between the A-zone power capacitor and the B-zone power capacitor.

[0005] The drive board is fixed to the top surface of the heat sink base plate by screws, and thermally conductive silicone grease is filled between the drive board and the heat sink base plate.

[0006] The thermal conductivity of the thermal grease is ≥2.0W / (m·K), and the thermal grease coverage area on the bottom surface of the drive board is not less than 95% of the total area of ​​the bottom surface of the drive board.

[0007] The control board is stacked on top of the drive board, and the fixing screws passing through the control board and the drive board are threadedly connected to the heat dissipation base plate.

[0008] The upper cover covers the upper side of the control panel, and the edge of the upper cover is fixedly connected to the heat dissipation base plate to form a sealed cavity.

[0009] The fuse is fixed to the outside of the top cover and is electrically connected to the positive terminal.

[0010] The driver board is equipped with a temperature detection circuit.

[0011] The power capacitor in area A is electrically connected to the positive and negative terminals on the drive board via a positive and negative conductive ring fixed to the drive board; the power capacitor in area B is electrically connected to the positive and negative terminals on the drive board via a positive and negative conductive ring fixed to the drive board.

[0012] The advantages of this invention compared to existing technologies are: higher operational reliability. The golf cart controller of this invention features a capacitor partitioning arrangement, shortening the electrical path between power devices and energy storage capacitors, effectively compensating for voltage drops caused by wiring length, and reducing parasitic inductance and resistance. Experiments have shown that parasitic inductance can be reduced to below 50nH, resistance to below 5mΩ, and the dynamic response speed of the circuit can be improved by more than 30%. Simultaneously, through a stacked structure, combined with thermal grease and a heat sink, a highly efficient heat dissipation channel is formed, allowing for rapid conduction and diffusion of heat generated at the terminals. Experiments have shown that the operating temperature of the drive board can be reduced by 20-30℃. Furthermore, the external fuse design simplifies the replacement process, and the temperature detection circuit monitors and responds quickly in real time, significantly improving the controller's operational reliability and service life. The overall structure is compact, precisely positioned, and easy to install, making it suitable for mass applications in high-power power control scenarios. In short, this controller shortens electrical paths, enhances heat dissipation, and facilitates maintenance, thereby improving operational reliability and extending service life. Attached Figure Description

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0014] Figure 1 This is an exploded perspective view of a golf cart controller according to an embodiment of the present invention;

[0015] Figure 2 This is a circuit diagram of a golf cart controller according to an embodiment of the present invention;

[0016] Figure 3 This is the circuit diagram of a traditional golf cart controller.

[0017] In the picture:

[0018] 10. Heat dissipation base plate;

[0019] 20. Driver board; 21. Positive and negative terminals; 22. Phase terminal;

[0020] 30. Control board; 31. Power capacitor in area A; 311. Positive and negative conductive rings in area A; 32. Power capacitor in area B; 321. Positive and negative conductive rings in area B.

[0021] 40. Top cover;

[0022] 50. Fuse;

[0023] 300. Power capacitor. Detailed Implementation

[0024] See the example. Figure 1 and Figure 2 The golf cart controller shown includes a heat dissipation base plate 10, a drive board 20, a control board 30, a top cover 40, and a fuse 50. The drive board 20 has positive and negative terminals 21 and three phase terminal blocks 22 fixed to it by soldering. Each positive and negative terminal block 21 includes one positive terminal and one negative terminal. The control board 30 has power capacitors 31 in area A and 32 in area B. These power capacitors 31 and 32 are essentially used to divide all the power capacitors of the controller into two groups with roughly equivalent power or according to capacitor type, for ease of explanation only, and there are no special requirements. That is, [the following text is incomplete and requires further context: "to divide..."] Figure 1 The power capacitor 300 is divided into different types depending on the situation. Figure 2 The two groups are referred to as power capacitor 31 in area A and power capacitor 32 in area B, respectively. Similar to the prior art, the driver board 20 is generally equipped with six power switching transistors Q1-Q6, which are arranged around power capacitor 31 in area A and power capacitor 32 in area B.

[0025] To elaborate further:

[0026] The power capacitors 31 in area A and 32 in area B are located on the left and right sides of the control board 30, respectively, with a gap between them. This gap refers to a distance of at least 50mm between the power capacitors 31 and 32 in area A. That is, by zoning the capacitors, the electrical path can be effectively shortened. In another embodiment, the power capacitor 31 in area A is a ceramic capacitor with a capacitance range of 220-470μF; the power capacitor 32 in area B is an electrolytic capacitor with a capacitance range of 1000-2200μF; or, the power capacitor 31 in area A has a capacitance of 19800μF, the power capacitor 32 in area B has a capacitance of 6600μF, and both the power capacitors 31 in area A and 32 in area B are electrolytic capacitors.

[0027] Optimized:

[0028] The drive plate 20 is fixed to the top surface of the heat sink 10 by screws, and thermal grease (not shown in the figure) fills the space between the drive plate 20 and the heat sink 10. Generally, the thermal conductivity of the thermal grease is ≥2.0 W / (m·K), and the thermal grease coverage area on the bottom surface of the drive plate 20 is not less than 95% of the total bottom surface area of ​​the drive plate 20. The heat sink 10 is preferably made of aluminum alloy. That is, a sufficient amount of thermal grease can dissipate heat quickly.

[0029] The control board 30 is stacked on top of the drive board 20, and a fixing screw passing through the control board 30 and the drive board 20 is threadedly connected to the heat sink base plate 10. Generally, the fixing screws are M3-M5 stainless steel bolts, and locating pins are provided between the control board 30 and the drive board 20, with the locating pins and fixing screws distributed diagonally. That is, through the stacked structure, combined with thermal grease and the heat sink base plate, a highly efficient heat dissipation channel is formed.

[0030] The top cover 40 covers the upper side of the control board 30, and the edge of the top cover 40 is fixedly connected to the heat dissipation base plate 10 to form a sealed cavity, ensuring the airtightness and protection of the controller. Obviously, both the drive board 20 and the control board 30 are located in this sealed cavity.

[0031] The fuse 50 is fixed to the upper exterior of the cover 40 and is electrically connected to the positive terminal. That is, the external fuse design simplifies the replacement process.

[0032] The driver board 20 is equipped with a temperature detection circuit. Generally, the detection probe of the temperature detection circuit is attached to the solder area of ​​the positive and negative terminals 21, and the signal output terminal of the temperature detection circuit is electrically connected to the control board of the controller.

[0033] The power capacitor 31 in area A is electrically connected to the positive and negative terminals 21 on the drive board 20 via positive and negative conductive rings 311 fixed to the drive board 20. The power capacitor 32 in area B is electrically connected to the positive and negative terminals 21 on the drive board 20 via positive and negative conductive rings 321 fixed to the drive board 20. Generally, both the positive and negative conductive rings 311 in area A and 321 in area B are made of oxygen-free copper, and the cross-sectional diameter of the conductive rings is 8-12 mm. The surface of the conductive rings is plated with a tin plating layer with a thickness of 0.1-0.2 mm.

[0034] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A golf cart controller, comprising a heat dissipation base plate (10), a drive board (20), a control board (30), a top cover (40), and a fuse (50), wherein the drive board (20) is fixed with positive and negative terminals (21) and three phase terminals (22) by soldering, the positive and negative terminals (21) comprising one positive terminal and one negative terminal, and the control board (30) is provided with an A-zone power capacitor (31) and a B-zone power capacitor (32), characterized in that: The power capacitors in area A (31) and area B (32) are located on the left and right sides of the control board (30), and there is a gap between them.

2. The golf cart controller according to claim 1, characterized in that: The drive board (20) is fixed to the top surface of the heat sink base plate (10) by screws, and thermally conductive silicone grease is filled between the drive board (20) and the heat sink base plate (10).

3. The golf cart controller according to claim 2, characterized in that: The thermal conductivity of the thermal grease is ≥2.0W / (m・K), and the thermal grease coverage area on the bottom surface of the drive board (20) is not less than 95% of the total area of ​​the bottom surface of the drive board (20).

4. The golf cart controller according to claim 2, characterized in that: The control board (30) is stacked on top of the drive board (20), and the fixing screws that pass through the control board (30) and the drive board (20) are threadedly connected to the heat dissipation base plate (10).

5. The golf cart controller according to claim 4, characterized in that: The upper cover (40) covers the upper side of the control board (30), and the edge of the upper cover (40) is fixedly connected to the heat dissipation base plate (10) to form a sealed cavity.

6. The golf cart controller according to claim 1, characterized in that: The fuse (50) is fixed to the outside of the top cover (40) and is electrically connected to the positive terminal.

7. The golf cart controller according to claim 1, characterized in that: The drive board (20) is equipped with a temperature detection circuit.

8. The golf cart controller according to claim 1, characterized in that: The power capacitor (31) in area A is electrically connected to the positive and negative conductive rings (311) in area A fixed on the drive board (20) and the positive and negative terminals (21) on the drive board (20); the power capacitor (32) in area B is electrically connected to the positive and negative conductive rings (321) in area B fixed on the drive board (20) and the positive and negative terminals (21) on the drive board (20).

Images