Motor driving plate, motor and pump

Abstract

The utility model relates to the technical field of printed circuits, in particular to a motor driving board, a motor and a pump, the motor driving board comprises a circular PCB, the circular PCB comprises a first mounting surface, the first mounting surface is provided with an input part, an output part and a middle part connected between the input part and the output part, the input part and the output part are both located at the edge of the circular PCB, and an included angle between a first connecting line between the input part and the circle center of the circular PCB and a second connecting line between the output part and the circle center of the circular PCB is 90 degrees. The motor driving board comprises the circular PCB, so that the space utilization rate of the motor driving board is higher, wiring is optimized, and the length of a signal line is reduced. In addition, the input part and the output part are spaced by 90 degrees, so that the input part and the output part have a long distance, and interference between input and output is avoided.

Description

Technical Field

[0001] This application relates to the field of printed circuit technology, and more particularly to motor drive boards, motors, and pumps. Background Technology

[0002] A motor drive board is a circuit board used to control a motor, enabling it to operate according to specific working modes. For example, in a pump, the motor drive board allows the motor to operate in different modes, thus enabling the pump to operate in different modes, such as constant pressure, proportional pressure, or adaptive pressure.

[0003] In existing technologies, the installation space left for motors is often very limited. Traditional rectangular motor drive boards have low space utilization, which limits the reduction in motor size. Utility Model Content

[0004] This application provides a motor drive board, a motor, and a pump to solve the problem that the traditional rectangular motor drive board has low space utilization, which limits the reduction of motor size.

[0005] In a first aspect, the motor drive board provided in this application includes a circular PCB board, the circular PCB board including a first mounting surface, an input portion, an output portion and an intermediate portion connected between the input portion and the output portion are provided on the first mounting surface, the input portion and the output portion are both located at the edge of the circular PCB board, and the angle between the first line connecting the input portion and the center of the circular PCB board and the second line connecting the output portion and the center of the circular PCB board is 90 degrees.

[0006] The input section includes an external power input interface;

[0007] The intermediate section includes an EMC device, a bus electrolytic capacitor, a BUCK power supply, an LDO circuit, an MCU, and a smart power module. The EMC device is located near and electrically connected to the external power input interface. The bus electrolytic capacitor is located on the side of the first mounting surface away from the external power input interface and is electrically connected to the EMC device. The BUCK power supply is located near and electrically connected to the bus electrolytic capacitor. The LDO circuit is located near and electrically connected to the BUCK power supply. The MCU is located near and electrically connected to the LDO circuit. The smart power module is located between the MCU and the output section and is electrically connected to the BUCK power supply, the MCU, and the output section.

[0008] The output section includes a three-phase socket for connecting three-phase pins.

[0009] Secondly, the motor provided in this application includes:

[0010] Motor housing;

[0011] Stator, wherein the stator is connected to three phase lines;

[0012] A heat insulation plate, wherein the heat insulation plate is disposed at one end of the motor housing, and the three-phase pins of the heat insulation plate are electrically connected to the three-phase lines; and

[0013] The motor drive board described in the first aspect, wherein the three-phase pins are inserted into the three-phase socket.

[0014] Thirdly, the pump provided in this application includes the motor described in the second aspect.

[0015] Compared with the prior art, this application includes at least the following beneficial effects:

[0016] The motor driver board in this application includes a circular PCB board, which improves the space utilization of the motor driver board, optimizes wiring, and reduces signal line length. In addition, the input and output sections are separated by 90 degrees, which provides a greater distance between the input and output sections and avoids interference between them. Attached Figure Description

[0017] Figure 1 A schematic diagram of a pump according to an embodiment of this application is shown.

[0018] Figure 2 A schematic diagram of a motor housing according to an embodiment of this application is shown.

[0019] Figure 3 A schematic diagram of a heat insulation panel according to an embodiment of this application is shown.

[0020] Figure 4 A schematic diagram of the first mounting surface of the motor drive board according to an embodiment of this application is shown.

[0021] Figure 5 A schematic diagram of the back of the motor drive board according to an embodiment of this application is shown.

[0022] Figure 6 A circuit block diagram of a motor drive board according to an embodiment of this application is shown.

[0023] Figure label:

[0024] 1. External power input interface;

[0025] 2. EMC devices;

[0026] 3. Busbar electrolytic capacitors;

[0027] 4. BUCK power supply;

[0028] 5. MCU;

[0029] 6. LDO circuit;

[0030] 7. Fault display module;

[0031] 8. Intelligent power module;

[0032] 9. Three-phase socket;

[0033] 10. PWM communication circuit;

[0034] 11. Positioning screw holes;

[0035] 12. Grounding screw hole;

[0036] 13. Three-phase pin positioning hole;

[0037] 14. PWM interface;

[0038] 15. Pump body;

[0039] 16. Electric motor;

[0040] 17. Motor housing; 171. Through hole; 172. First mounting hole; 173. Second mounting hole;

[0041] 18. Motor drive board; 181. Input section; 182. Output section; 183. First connection; 184. Second connection;

[0042] 19. Insulation board; 191. Hollow connecting post; 192. Three-phase pin; 193. Connecting hole;

[0043] 20. Grounding screw. Detailed Implementation

[0044] The technical solution of this application will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining this application and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts relevant to this application are shown in the accompanying drawings, not all of them.

[0045] This application defines certain directional terms. Unless otherwise stated, the directional terms used, such as "up," "down," "left," "right," "inner," and "outer," are used for ease of understanding and therefore do not constitute a limitation on the scope of protection of this application.

[0046] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0047] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0048] like Figure 1 As shown, the pump in this embodiment includes a pump body 15 and a motor 16. The motor 16 is used to drive the impeller (not shown) in the pump body 15 to rotate, thereby realizing the pumping of fluid.

[0049] like Figure 2 As shown, the motor 16 includes a motor housing 17, within which a stator (not shown) and a rotor (not shown) are disposed, with the rotor rotatably disposed within the stator. The stator is connected to three-phase wires (not shown), which extend outward through through holes 171 on the motor housing 17.

[0050] like Figure 2 As shown, the motor housing 17 is also provided with a first mounting hole 172 and a second mounting hole 173. The first mounting hole 172 is used to connect a positioning screw to fix the motor drive board 18 to the motor housing 17 (see Figure 173). Figure 1 The second mounting hole 173 is used to connect the grounding screw 20 (see...). Figure 1 ).

[0051] like Figure 1 As shown, a heat insulation plate 19 is provided between the motor housing 17 and the motor drive plate 18. The heat insulation plate 19 separates the motor housing 17 and the motor drive plate 18, reducing heat transfer from the motor 16 to the motor drive plate 18. As an example, the heat insulation plate 19 can be made of plastic.

[0052] like Figures 1 to 3As shown, the heat insulation plate 19 is provided with hollow connecting posts 191. The position of the hollow connecting posts 191 corresponds to the position of the first mounting holes 172 on the motor housing 17. When the heat insulation plate 19 is installed on the motor housing 17, the hollow connecting posts 191 and the first mounting holes 172 correspond one-to-one. In addition, the positioning screw holes 11 on the motor drive plate 18 (see...) Figure 4 The motor drive plate 18 is installed on the heat insulation plate 19 and the heat insulation plate 19 is installed on the motor housing 17 by screws.

[0053] In addition, such as Figures 1 to 3 As shown, the heat insulation plate 19 is also provided with a connection hole 193 corresponding to the second mounting hole 173, and the motor drive plate 18 is provided with a grounding screw hole 12 corresponding to the connection hole 193. When the heat insulation plate 19 is installed on the motor housing 17 and the motor drive plate 18 is installed on the heat insulation plate 19, the grounding screw hole 12, the connection hole 193 and the second mounting hole 173 are interconnected, so that the grounding screw 20 passes through the grounding screw hole 12 and the connection hole 193 in sequence and is connected to the second mounting hole 173.

[0054] like Figure 4 As shown, the motor drive board 18 includes a circular PCB board, which includes a first mounting surface. An input portion 181, an output portion 182, and an intermediate portion connecting the input portion 181 and the output portion 182 are disposed on the first mounting surface.

[0055] like Figure 4 As shown, the input section 181 includes an external power input interface 1. The output section 182 includes a three-phase socket 9 for connecting three-phase pins 192 on the heat insulation plate 19. Both the input section 181 and the output section 182 are located at the edge of the circular PCB board. The angle between the first line 183 connecting the input section 181 to the center of the circular PCB board and the second line 184 connecting the output section 182 to the center of the circular PCB board is 90 degrees. Therefore, the input section 181 and the output section 182 are spaced far apart, avoiding interference between the input and output.

[0056] like Figure 4As shown, the middle section includes an EMC device 2, a bus electrolytic capacitor 3, a BUCK power supply 4, an LDO circuit 6, an MCU 5, and a smart power module 8. The EMC device 2 is located near and electrically connected to the external power input interface 1. The bus electrolytic capacitor 3 is located on the first mounting surface away from the external power input interface 1 and is electrically connected to the EMC device 2. The BUCK power supply 4 is located near and electrically connected to the bus electrolytic capacitor 3. The LDO circuit 6 is located near and electrically connected to the BUCK power supply 4. The MCU 5 is located near and electrically connected to the LDO circuit 6. The smart power module 8 is located between the MCU 5 and the output section 182 and is electrically connected to the BUCK power supply, the MCU 5, and the output section 182.

[0057] Furthermore, such as Figure 5 As shown, on the other side of the circular PCB board, the three-phase socket 9 has a three-phase pin 192 positioning hole 13, and the three-phase pin 192 passes through the three-phase pin 192 positioning hole 13.

[0058] Furthermore, such as Figure 4 As shown, when the motor 16 is a motor that can be controlled by an external device, the input section 181 also includes a PWM communication circuit 10. The PWM interface 14 of the PWM communication circuit 10 is located on one side of the external power input interface 1. The PWM communication circuit 10 is located close to the external power input interface 1 and is positioned between the external power input interface 1 and the MCU 5. The PWM communication circuit 10 is electrically connected to the MCU 5. The motor 16 can be controlled by an external device through the PWM communication circuit 10.

[0059] Specifically, external control signals can be input to the MCU through the PWM communication circuit 10, thereby controlling the operating status of the motor or pump. At the same time, feedback signals can also be sent to the outside through the PWM communication circuit 10, and external devices can read the feedback signals to know the current operating status of the motor or pump.

[0060] Furthermore, such as Figure 4 As shown, the motor drive board 18 also includes a fault display module 7, which is electrically connected to the MCU5 and is located at the center of the first mounting surface. When the motor 16 malfunctions, the fault display module 7 can display the fault.

[0061] Furthermore, such as Figure 4 As shown, the first connecting line 183 divides the first mounting surface into a first region and a second region. Figure 4In the diagram, the area to the left of the first connection 183 is the first region, and the area to the right of the first connection 183 is the second region. External power input interface 1, EMC device 2, BUCK power supply 4, LDO circuit 6, and MCU 5 are located in the first region, while intelligent power module 8 is located in the second region.

[0062] like Figure 6 As shown, when the motor drive board 18 is working, external high-voltage DC power enters the circular PCB board through the external power input interface 1. Then, the external high-voltage DC power passes through the EMC device 2 to filter out some electromagnetic interference signals. Next, the external high-voltage DC power passes through the bus electrolytic capacitor 3 to filter out some noise. Simultaneously, the bus electrolytic capacitor 3 supplies power to the BUCK power supply 4 and the Intelligent Power Module (IPM) 8. The BUCK power supply 4 converts the 325V high-voltage DC power to 15V and supplies power to the LDO circuit 6 and the drive side of the IPM module. The LDO circuit 6 converts the 15V voltage to 3.3V and supplies power to the MCU5. The MCU5 sends commands to control the operation of the motor 16 and to detect the operating status of the motor 16. If a fault occurs, the motor 16 stops running, and the fault is indicated by the fault display module 7 (e.g., LED indicator).

[0063] Although this application has been described in detail above with general descriptions, specific embodiments, and experiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of this application fall within the scope of protection claimed in this application.

Claims

1. A motor drive board, characterized in that, The motor drive board (18) includes a circular PCB board, which includes a first mounting surface. An input portion (181), an output portion (182), and an intermediate portion connecting the input portion (181) and the output portion (182) are provided on the first mounting surface. The input portion (181) and the output portion (182) are both located at the edge of the circular PCB board. The angle between the first line (183) connecting the input portion (181) and the center of the circular PCB board and the second line (184) connecting the output portion (182) and the center of the circular PCB board is 90 degrees. The input section (181) includes an external power input interface (1); The intermediate part includes an EMC device (2), a bus electrolytic capacitor (3), a BUCK power supply (4), an LDO circuit (6), an MCU (5), and a smart power module (8). The EMC device (2) is located near the external power input interface (1) and is electrically connected to the external power input interface (1). The bus electrolytic capacitor (3) is located on the side of the first mounting surface away from the external power input interface (1) and is electrically connected to the EMC device (2). The BUCK power supply (4) is located near the bus electrolytic capacitor (3) and is electrically connected to the bus electrolytic capacitor (3). The LDO circuit (6) is located near the BUCK power supply (4) and is electrically connected to the BUCK power supply (4). The MCU (5) is located near the LDO circuit (6) and is electrically connected to the LDO circuit (6). The smart power module (8) is located between the MCU (5) and the output section (182) and is electrically connected to the BUCK power supply (4), the MCU (5), and the output section (182). The output section (182) includes a three-phase socket (9) for connecting a three-phase pin (192).

2. The motor drive board according to claim 1, characterized in that, The input section (181) further includes: The PWM communication circuit (10) has a PWM interface (14) located on one side of the external power input interface (1). The PWM communication circuit (10) is located close to the external power input interface (1) and is located between the external power input interface (1) and the MCU (5). The PWM communication circuit (10) is electrically connected to the MCU (5).

3. The motor drive board according to claim 1, characterized in that, The motor drive board (18) also includes: The fault display module (7) is electrically connected to the MCU (5) and is located at the center of the first mounting surface.

4. The motor drive board according to claim 1, characterized in that, The first connecting line (183) divides the first mounting surface into a first region and a second region. The external power input interface (1), the EMC device (2), the BUCK power supply (4), the LDO circuit (6), and the MCU (5) are located in the first region, and the intelligent power module (8) is located in the second region.

5. The motor drive board according to claim 1, characterized in that, The circular PCB board is also provided with one or more positioning screw holes (11).

6. The motor drive board according to claim 1, characterized in that, The circular PCB board is also provided with a grounding screw hole (12).

7. An electric motor, characterized in that, The motor (16) includes: Motor housing (17); Stator, wherein the stator is connected to three phase lines; A heat insulation plate (19) is disposed at one end of the motor housing (17), and the three-phase pins (192) of the heat insulation plate (19) are electrically connected to the three-phase lines; and The motor drive board (18) according to any one of claims 1 to 6, wherein the three-phase pin (192) is inserted into the three-phase socket (9).

8. A pump, characterized in that, The pump includes the motor (16) as described in claim 7.

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