Motor controller

Abstract

The utility model relates to a motor controller, belongs to motor controller field, including base, casing, power amplifier board, control panel, capacitor subassembly and binding post subassembly, base and casing enclose to form the cavity, control panel and power amplifier board are arranged in parallel from top to bottom in proper order in the cavity, the binding post subassembly is equipped with the capacitor subassembly, the binding post subassembly is equipped with the capacitor subassembly. The base is fixedly connected with the power board, the capacitor assembly and the binding post assembly are fixed on the power board, one side of the binding post assembly is fixedly connected with the control board, and the purpose of how to meet the requirements of low cost and high performance of the motor controller at the same time is achieved.

Description

Technical Field

[0001] The utility model relates to the field of motor controllers, and specifically to a motor controller. Background Art

[0002] At present, there are two types of terminal assembly structures for motor controllers: 1. Locked to the aluminum substrate by screws; 2. Soldered to the control board by wave soldering. In either form, it is impossible to meet the requirements of both low cost and high performance of the motor controller.

[0003] The main way to increase the power of a motor controller is to increase the number of MOS transistors. However, increasing the number of MOS transistors will surely increase the volume of the controller and the production cost. If the screw locking method is adopted, the higher the power, the larger the terminals need to be adapted, and the controller structure materials and batch production costs are relatively high. The layout space inside the board is relatively compact, and the controller generates serious heat. For the terminals wave soldered to the control board, although its materials and assembly costs are relatively low, its structure cannot pass a large current.

[0004] Therefore, a motor controller is provided to solve the problems raised in the above background art. Content of the Utility Model

[0005] The technical problem solved by the utility model is how to meet the requirements of both low cost and high performance of the motor controller.

[0006] The technical solution of the utility model to solve the above technical problems is as follows: A motor controller includes a base, a housing, a power board, a control board, a capacitor assembly and a terminal assembly. The base and the housing enclose a cavity. The control board and the power board are arranged in parallel from top to bottom and are located inside the cavity. The base is fixedly connected to the power board. The capacitor assembly and the terminal assembly are fixed on the power board. One side of the terminal assembly is fixedly connected to the control board.

[0007] The beneficial effects of the utility model are: Inside the cavity enclosed by the base and the housing, both the capacitor assembly and the terminal assembly are installed on the power board, and the control board is installed on the terminal assembly. This reduces the assembly time and assembly process, reduces the volume of the motor controller, and lowers the production cost.

[0008] At the same time, the terminal assembly is fixedly connected to the power board, effectively reducing the contact internal resistance between the terminal assembly and the power board, and meeting the requirements of a high-performance motor controller. The capacitor assembly contacts the base through the power board, increasing the heat dissipation area of the capacitor assembly, enabling the heat generated by the capacitor assembly during operation to be effectively and evenly transmitted to the base, and improving the heat dissipation effect.

[0009] On the basis of the above technical solutions, the utility model can also be improved as follows.

[0010] Further, the capacitor assembly includes a plurality of first capacitors, a plurality of second capacitors and a plurality of MOS transistors. The plurality of second capacitors are divided into two groups of second capacitor groups, and the two groups of second capacitor groups are fixedly spaced on the power board. Every two of the MOS transistors are divided into a group of MOS transistor groups, and multiple groups of MOS transistor groups are located between the two groups of second capacitors and are fixedly spaced on the power board. At least one of the first capacitors is provided between adjacent two groups of MOS transistor groups.

[0011] The beneficial effects of adopting the above further solution are as follows: Setting a plurality of first capacitors, a plurality of second capacitors and a plurality of MOS transistors on the power board can store more electric energy and effectively improve the power of the motor controller. All the plurality of MOS transistors are in contact with the base, which can increase the heat dissipation area, improve the heat dissipation effect, thereby improving the performance of the MOS transistors and increasing the service life of the motor controller.

[0012] Further, the terminal assembly includes a first terminal and a second terminal. The first terminal is located above the first capacitor and is fixedly connected to the power board. The second terminal is located on one side of one of the groups of second capacitors and is fixedly connected to the power board.

[0013] The beneficial effects of adopting the above further solution are as follows: The first terminal is located above the first capacitor, and the second terminal is located on the other side of one of the groups of second capacitors, which can save the board space of the components on the power board so as to facilitate the installation of a plurality of MOS transistors on the power board.

[0014] Meanwhile, both the first terminal and the second terminal are fixedly connected to the power board, which improves the fault tolerance rate of the incoming materials of the terminals fixed by traditional screws and effectively reduces the contact internal resistance between the first terminal and the second terminal and the power board. Under the condition of the same current, the heat generated by the first terminal and the second terminal installed on the power board is much less than that of the terminals fixed by traditional screws.

[0015] Further, the first terminal includes a first terminal platform and a first straight sheet metal piece. One end of the first straight sheet metal piece is fixedly connected to the first terminal platform, and the other end of the first straight sheet metal piece has a first bending portion, and the first bending portion is fixedly connected to the power board.

[0016] The beneficial effects of adopting the above further solution are as follows: The first terminal platform is fixedly connected to the power board through the first bending portion of the first straight sheet metal piece. Compared with the assembly method of traditional terminals (screw fixation), the assembly time and assembly process are reduced, and the assembly efficiency of the motor controller is effectively improved.

[0017] Further, the second terminal includes a second terminal base and a second straight sheet metal piece. One end of the second straight sheet metal piece is fixedly connected to the second terminal base, and the other end of the second straight sheet metal piece has a second bending portion, which is fixedly connected to the power board.

[0018] The beneficial effect of adopting the above further scheme is that the second terminal base is fixedly connected to the power board through the second bending portion of the second straight sheet metal piece. Compared with the assembly method of traditional terminals (fixed by screws), the assembly time and assembly process are reduced, and the assembly efficiency of the motor controller is effectively improved.

[0019] Further, one side of the first terminal has a first bump, and a groove is provided on the control board. The first bump is fixedly connected to the groove.

[0020] The beneficial effect of adopting the above further scheme is that the first terminal is fixedly connected to the control board through the first bump. Assembling the control board and the first terminal together can reduce the volume of the motor controller.

[0021] Further, it further includes a socket, and the socket is fixedly connected to the control board.

[0022] The beneficial effect of adopting the above further scheme is that the socket can facilitate the connection of electrical appliances to the circuit.

[0023] Further, the housing has a first opening, a second opening and a third opening. The first terminal passes through the first opening and is fixedly connected to the housing. The second terminal passes through the second opening and is fixedly connected to the housing. The socket passes through the third opening and is fixedly connected to the housing.

[0024] The beneficial effect of adopting the above further scheme is that the housing is fixedly connected to the first terminal, the second terminal and the socket through the first opening, the second opening and the third opening respectively. The assembly is simple and the production efficiency can be improved.

[0025] Further, it further includes a three-phase dust cover and a power supply dust cover. The three-phase dust cover is located above the first terminal and is detachably connected to the housing. The power supply dust cover is located above the second terminal and is detachably connected to the housing.

[0026] The beneficial effect of adopting the above further scheme is that the three-phase dust cover and the power supply dust cover can prevent dust from entering the device and improve the service life of the device.

[0027] Further, the inner wall of the base has a second bump arranged along its circumference.

[0028] The beneficial effect of adopting the above further scheme is that the housing is fixedly connected to the base through the second bump. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is an exploded structural schematic diagram of the motor controller of the present utility model;

[0030] Figure 2 is a structural schematic diagram of the power board of the present utility model;

[0031] Figure 3 is a structural schematic diagram of the first terminal of the present utility model;

[0032] Figure 4 is a structural schematic diagram of the second terminal of the present utility model;

[0033] Figure 5 is a structural schematic diagram of the base of the present utility model;

[0034] Figure 6 is a top view of the base of the present utility model;

[0035] Figure 7 is a structural schematic diagram of the present utility model without the three-phase dust cover and the power supply dust cover installed;

[0036] Figure 8 is a structural schematic diagram of the present utility model with the three-phase dust cover and the power supply dust cover installed;

[0037] Figure 9 is Figure 8 the schematic diagram of the B-B structure in

[0038] In the drawings, the list of components represented by each reference numeral is as follows:

[0039] 1. Base; 101. Second convex block; 102. First positioning post; 103. First threaded hole; 104. Second threaded hole; 2. Outer shell; 201. First opening; 202. Second opening; 203. Third opening; 204. Second through hole; 3. Power board; 301. First through hole; 4. Control board; 5. Capacitor assembly; 501. First capacitor; 502. Second capacitor; 503. MOS tube; 6. Terminal assembly; 601. First terminal; 6011. First terminal platform; 6012. First straight sheet metal; 6013. First bending part; 6014. First convex block; 6015. Second positioning post; 602. Second terminal; 6021. Second terminal platform; 6022. Second straight sheet metal; 6023. Second bending part; 6024. Third positioning post; 7. Socket; 8. Three-phase dust cover; 9. Power supply dust cover. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0040] The principles and features of the present utility model will be described below in conjunction with the accompanying drawings. The examples given are only used to explain the present utility model and are not intended to limit the scope of the present utility model.

[0041] As Figures 1 - 9 shown, this embodiment provides a motor controller, which includes a base 1, a housing 2, a power board 3, a control board 4, a capacitor assembly 5, and a terminal block assembly 6. The base 1 and the housing 2 enclose a cavity. The control board 4 and the power board 3 are arranged in parallel from top to bottom and are located in the cavity. The base 1 is fixedly connected to the power board 3. The capacitor assembly 5 and the terminal block assembly 6 are fixed on the power board 3. One side of the terminal block assembly 6 is fixedly connected to the control board 4.

[0042] In the cavity enclosed by the base 1 and the housing 2, the capacitor assembly 5 and the terminal block assembly 6 are both installed on the power board 3, and the control board 4 is installed on the terminal block assembly 6. This reduces the assembly time and assembly process, reduces the volume of the motor controller, and lowers the production cost.

[0043] At the same time, the terminal block assembly 6 is fixedly connected to the power board 3, effectively reducing the contact internal resistance between the terminal block assembly 6 and the power board 3, and meeting the requirements of a high-performance motor controller. The capacitor assembly 5 contacts the base 1 through the power board 3, increasing the heat dissipation area of the capacitor assembly 5, enabling the heat dissipated by the capacitor assembly 5 during operation to be effectively and evenly transmitted to the base 1, and improving the heat dissipation effect.

[0044] Specifically, in this embodiment, two first positioning posts 102 are fixedly arranged at intervals on the base 1. One end of the first positioning post 102 is fixedly connected to the base 1, and the other end of the first positioning post 102 is fixedly connected to the bottom of the power board 3. The number of the first positioning posts 102 can be increased according to actual needs.

[0045] Among them, a plurality of first through holes 301 are provided on the power board 3, and first threaded holes 103 matching the first through holes 301 are provided on the base 1. Workers can use a plurality of screws to fixedly connect the power board 3 and the base 1 by threading.

[0046] On the basis of the above solution, the capacitor assembly 5 includes a plurality of first capacitors 501, a plurality of second capacitors 502, and a plurality of MOS transistors 503. The plurality of second capacitors 502 are divided into two groups of second capacitor groups, and the two groups of second capacitor groups are fixedly arranged at intervals on the power board. Every two MOS transistors 503 are divided into a group of MOS transistor groups, and multiple groups of MOS transistor groups are located between the two groups of second capacitors 502 and are fixedly arranged at intervals on the power board 3. At least one first capacitor 501 is provided between adjacent groups of MOS transistor groups.

[0047] On the power board 3, multiple first capacitors 501, multiple second capacitors 502, and multiple MOS transistors 503 are provided, which can store more electrical energy and effectively improve the power of the motor controller. Multiple MOS transistors 503 are all in contact with the base 1, which can increase the heat dissipation area, improve the heat dissipation effect, thereby improving the performance of the MOS transistors 503 and increasing the service life of the motor controller.

[0048] Specifically, the control board 4 is located between two groups of second capacitor groups.

[0049] Specifically, in this embodiment, there are 2 first capacitors 501, 7 second capacitors 502, and 12 MOS transistors 503.

[0050] Among them, six groups of MOS transistors 503 are divided into two rows and arranged at intervals on the power board 3. Each row of MOS transistors 503 includes three groups of MOS transistors 503. Two first capacitors 501 are arranged at intervals between one row of MOS transistors 503. Among them, one group of second capacitors 502 includes four second capacitors 502, and the other group of second capacitors 502 includes three second capacitors 502. Different numbers of first capacitors 501, second capacitors 502, and MOS transistors 503 can also be set according to actual needs.

[0051] In addition, in this embodiment, the capacitance of the second capacitor 502 is greater than that of the first capacitor 501.

[0052] Specifically, multiple groups of second capacitors 502 and multiple groups of MOS transistors 503 can be provided on the power board 3 according to actual needs, but multiple groups of second capacitors 502 need to be located on both sides of multiple groups of MOS transistors 503. When the capacitive components are closer to the MOS transistors, the performance advantages of the capacitors can be better exerted, and at the same time, the performance requirements of the MOS transistors can be reduced, and the efficiency of the motor controller can be improved.

[0053] Among them, the first capacitor 501, the second capacitor 502, and the MOS transistor 503 are all soldered to the power board 3 by reflow soldering, realizing the complete modularization of the power part, improving the utilization rate of the capacitor performance, the product production efficiency, and the product reliability.

[0054] On the basis of the above solution, the terminal block assembly 6 includes a first terminal 601 and a second terminal 602. The first terminal 601 is located above the first capacitor 501 and is fixedly connected to the power board 3. The second terminal 602 is located on one side of one group of the second capacitors 502 and is fixedly connected to the power board 3.

[0055] The first terminal 601 is located above the first capacitor 501, and the second terminal 602 is located on the other side of one group of the second capacitors 502, which can save the board space of the components on the power board 3, so as to facilitate the installation of multiple MOS transistors 503 on the power board 3.

[0056] Meanwhile, both the first terminal 601 and the second terminal 602 are fixedly connected to the power board 3, which improves the fault tolerance rate of the incoming materials of the terminals fixed by traditional screws and effectively reduces the contact internal resistance between the first terminal 601 and the second terminal 602 and the power board 3. Under the same current condition, the heat generated by the first terminal 601 and the second terminal 602 installed on the power board 3 is much less than that of the terminals fixed by traditional screws.

[0057] Specifically, in this embodiment, the first terminal 601 is a three-hole terminal, and the second terminal 602 is a two-hole terminal. Both the first terminal 601 and the second terminal 602 are welded to the power board 3 by reflow soldering.

[0058] Among them, the first terminal 601 further includes a plurality of second positioning posts 6015. One end of the second positioning post 6015 is fixedly connected to the bottom of the first terminal 601, and the other end of the second positioning post 6015 is fixedly connected to the top of the power board 3, increasing the connection stability between the first terminal 601 and the power board 3.

[0059] The second terminal 602 further includes a plurality of third positioning posts 6024. One end of the third positioning post 6024 is fixedly connected to the bottom of the second terminal 602, and the other end of the third positioning post 6024 is fixedly connected to the top of the power board 3, increasing the connection stability between the second terminal 602 and the power board 3.

[0060] In this embodiment, a group of second capacitors 502 on one side of the second terminal 602 includes three second capacitors 502. According to actual needs, the second terminal 602 can also be installed on one side of another group of second capacitors 502.

[0061] Specifically, in this embodiment, the first terminal 601 and the second terminal 602 both form an overhead design through a plurality of second positioning posts 6015 and a plurality of third positioning posts 6024, leaving more space for component layout on the power board 3, such as the first capacitor 501 and the MOS transistor 503. Such an overhead design saves the layout space of components on the power board 3 and can accommodate more MOS transistors 503 within a smaller size. And the components are arranged at intervals, enabling the heat generated by the components during operation to be effectively and evenly transmitted to the base 1, solving the problem that some components of the terminals fixed by traditional screws generate concentrated heat and cannot dissipate heat effectively.

[0062] Among them, the two first capacitors 501 are both spaced in the overhead space of the first terminal 601.

[0063] Based on the above solution, the first terminal 601 includes a first terminal base 6011 and a first straight sheet metal piece 6012. One end of the first straight sheet metal piece 6012 is fixedly connected to the first terminal base 6011, and the other end of the first straight sheet metal piece 6012 has a first bending portion 6013, and the first bending portion 6013 is fixedly connected to the power board 3.

[0064] The first terminal base 6011 is fixedly connected to the power board 3 through the first bending portion 6013 of the first straight sheet metal piece 6012. Compared with the assembly method of traditional terminals (screw fixation), the assembly time and assembly process are reduced, and the assembly efficiency of the motor controller is effectively improved.

[0065] Specifically, after the first bending portion 6013 is in contact with the copper skin layer of the power board 3, it is welded.

[0066] Among them, in this embodiment, the first terminal 601 includes three first bending portions 6013, and all three first bending portions 6013 are welded to the power board 3.

[0067] In addition, the staff can form the second bending portion 6023 by bending the second straight sheet metal piece 6022 with a bending machine.

[0068] Based on the above solution, the second terminal 602 includes a second terminal base 6021 and a second straight sheet metal piece 6022. One end of the second straight sheet metal piece 6022 is fixedly connected to the second terminal base 6021, and the other end of the second straight sheet metal piece 6022 has a second bending portion 6023, and the second bending portion 6023 is fixedly connected to the power board 3.

[0069] The second terminal base 6021 is fixedly connected to the power board 3 through the second bending portion 6023 of the second straight sheet metal piece 6022. Compared with the assembly method of traditional terminals (screw fixation), the assembly time and assembly process are reduced, and the assembly efficiency of the motor controller is effectively improved.

[0070] Specifically, after the second bending portion 6023 is in contact with the copper skin layer of the power board 3, it is welded.

[0071] Among them, in this embodiment, the second terminal 602 includes two second bending portions 6023, and both two second bending portions 6023 are welded to the power board 3.

[0072] In addition, the staff can form the second bending portion 6023 by bending the second straight sheet metal piece 6022 with a bending machine.

[0073] On the basis of the above solution, one side of the first terminal 601 has a first bump 6014, a groove is provided on the control board 4, and the first bump 6014 is fixedly connected to the groove.

[0074] The first terminal 601 is fixedly connected to the control board 4 through the first bump 6014. Assembling the control board 4 and the first terminal 601 together can reduce the volume of the motor controller.

[0075] Specifically, the control board 4 is fixedly connected to the first terminal 601 through the first bump 6014 and is located between two groups of second capacitors 502.

[0076] On the basis of the above solution, it further includes a socket 7, and the socket 7 is fixedly connected to the control board 4.

[0077] The socket 7 can facilitate the connection of electrical appliances to the circuit.

[0078] Specifically, the socket 7 passes through the control board 4 and is fixedly connected to the control board 4.

[0079] Specifically, a female header is further provided on the control board 4, and a male pin is further provided on the power board 3. During assembly, the staff aligns the female header on the control board 4 with the male pin on the power board 3. After determining the position, press down the control board 4 to make the control board 4 and the power board 3 assembled reliably and enable signal connection between the control board 4 and the power board 3.

[0080] Among them, the socket 7 and the control board 4 are welded together by wave soldering.

[0081] On the basis of the above solution, the housing 2 has a first opening 201, a second opening 202, and a third opening 203. The first terminal 601 passes through the first opening 201 and is fixedly connected to the housing 2. The second terminal 602 passes through the second opening 202 and is fixedly connected to the housing 2. The socket 7 passes through the third opening 203 and is fixedly connected to the housing 2.

[0082] The housing 2 is fixedly connected to the first terminal 601, the second terminal 602, and the socket 7 respectively through the first opening 201, the second opening 202, and the third opening 203. The assembly is simple and the production efficiency can be improved.

[0083] Specifically, the housing 2 is circumferentially provided with a glue injection groove along the opening directions of the first opening 201, the second opening 202, and the third opening 203. After the first terminal 601, the second terminal 602, and the socket 7 pass through the first opening 201, the second opening 202, and the third opening 203 respectively, the staff uses a glue gun to inject sealing silicone into the glue injection groove to ensure that the first terminal 601, the second terminal 602, and the socket 7 are all sealed with the housing 2.

[0084] Based on the above solution, it further includes a three-phase dust cover 8 and a power supply dust cover 9. The three-phase dust cover 8 is located above the first terminal 601 and is detachably connected to the housing 2. The power supply dust cover 9 is located above the second terminal 602 and is detachably connected to the housing 2.

[0085] The three-phase dust cover 8 and the power supply dust cover 9 can prevent dust from entering the device and improve the service life of the device.

[0086] Specifically, as Figure 8 shown, the power supply dust cover 9 has the marks of \"+\" and \"- \", and the housing 2 also has the marks of \"+\" and \"- \". When installing, the staff needs to snap the positive and negative marks of the power supply dust cover 9 onto the corresponding positive and negative marks on the housing 2 one by one.

[0087] Among them, both the three-phase dust cover 8 and the housing 2 also have triangular marks. When installing, the staff needs to snap the triangular marks of the power supply dust cover 9 onto the corresponding triangular marks on the housing 2 one by one.

[0088] Based on the above solution, the inner wall of the base 1 has a second convex block 101 arranged along its circumferential direction.

[0089] The housing 2 is fixedly connected to the base 1 through the second convex block 101.

[0090] Specifically, the second convex block 101 has a plurality of second threaded holes 104, and the housing 2 has a plurality of second through holes 204 corresponding to the plurality of second threaded holes 104. The staff can use a plurality of screws to threadedly fix and connect the housing 2 and the base 1.

[0091] Among them, in this embodiment, when the device is assembled, the edge of the control board 4 along the length direction close to the socket 7 is in close contact with the second convex block 101; the edge of the housing 2 along the length direction close to the socket 7 is in close contact with the control board 4, effectively ensuring the fixation of the control board 4, and facilitating assembly and maintenance, greatly saving the assembly process.

[0092] In this embodiment, when in use, first, divide the plurality of second capacitors 502 into two groups of second capacitors 502 and fixedly install them on the power board 3 at intervals; then fixedly install two rows of MOS transistors 503 on the power board 3 at intervals and locate them between the two groups of second capacitors 502. Subsequently, the first capacitor 501 is fixed between adjacent two groups of MOS transistors 503 in the row of MOS transistors 503 close to the inner wall of the base 1. Immediately afterwards, install the first terminal 601 above the first capacitor 501, and install the second terminal 602 on the other side of one of the groups of second capacitors 502 and fixedly connect it to the power board 3.

[0093] Secondly, the power board 3 is fixedly connected to the base 1 by threading. Then, the control board 4 welded to the socket 7 is clamped to the first terminal 601 through the first bump 6014. At the same time, one side of the control board 4 close to the socket 7 along the length direction is closely attached to the second bump 101. Subsequently, the housing 2 is fixedly connected to the second bump 101 of the base 1 by threading through a plurality of second through holes 204.

[0094] Finally, the staff injects sealing silicone into the caulking grooves circumferentially arranged at the first opening 201, the second opening 202, and the third opening 203 to ensure the sealing performance of the motor controller. Then, the three-phase dust-proof cover 8 and the power supply dust-proof cover 9 are clamped to the housing 2, and the assembly of one motor controller is completed.

[0095] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0096] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0097] In the present invention, unless otherwise clearly specified and defined, the terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0098] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0099] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0100] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.

Claims

1. A motor controller, characterized in that: The invention comprises a base (1), a housing (2), a power board (3), a control board (4), a capacitor assembly (5) and a terminal assembly (6); the base (1) and the housing (2) form a cavity; the control board (4) and the power board (3) are arranged in parallel from top to bottom and are located in the cavity; the base (1) is fixedly connected to the power board (3); the capacitor assembly (5) and the terminal assembly (6) are fixedly connected to the power board (3); and one side of the terminal assembly (6) is fixedly connected to the control board (4).

2. A motor controller according to claim 1, characterized in that: The capacitor assembly (5) comprises a plurality of first capacitors (501), a plurality of second capacitors (502) and a plurality of MOS transistors (503); the plurality of second capacitors (502) are divided into two groups of second capacitor groups; the two groups of second capacitor groups are fixed at intervals on the power board (3); every two MOS transistors (503) are divided into one group of MOS transistor groups; the plurality of groups of MOS transistor groups are located between the two groups of second capacitors (502) and fixed at intervals on the power board (3); and at least one first capacitor (501) is arranged between two adjacent groups of MOS transistor groups.

3. A motor controller according to claim 2, characterized in that: The terminal assembly (6) comprises a first terminal (601) and a second terminal (602), wherein the first terminal (601) is located above the first capacitor (501) and is fixedly connected to the power board (3), and the second terminal (602) is located on one side of one group of the second capacitors (502) and is fixedly connected to the power board (3).

4. A motor controller according to claim 3, characterized in that: The first terminal (601) comprises a first terminal base (6011) and a first straight sheet metal piece (6012), one end of the first straight sheet metal piece (6012) is fixedly connected to the first terminal base (6011), and the other end of the first straight sheet metal piece (6012) has a first bending portion (6013), and the first bending portion (6013) is fixedly connected to the power board (3).

5. A motor controller according to claim 3, characterized in that: The second terminal (602) comprises a second terminal base (6021) and a second straight sheet metal piece (6022), one end of the second straight sheet metal piece (6022) is fixedly connected to the second terminal base (6021), and the other end of the second straight sheet metal piece (6022) has a second bent portion (6023), and the second bent portion (6023) is fixedly connected to the power board (3).

6. A motor controller according to claim 3, characterized in that: One side of the first terminal (601) has a first protrusion (6014), the control board (4) is provided with a groove, and the first protrusion (6014) is fixedly connected to the groove.

7. A motor controller according to claim 6, characterized in that: It also comprises a connection socket (7), wherein the connection socket (7) is fixedly connected to the control panel (4).

8. A motor controller according to claim 7, characterized in that: The housing (2) has a first opening (201), a second opening (202) and a third opening (203); the first terminal (601) passes through the first opening (201) and is fixedly connected to the housing (2); the second terminal (602) passes through the second opening (202) and is fixedly connected to the housing (2); and the connection socket (7) passes through the third opening (203) and is fixedly connected to the housing (2).

9. A motor controller according to claim 6, characterized in that: It also includes a three-phase dust cover (8) and a power supply dust cover (9), wherein the three-phase dust cover (8) is located above the first terminal (601) and is detachably connected to the housing (2), and the power supply dust cover (9) is located above the second terminal (602) and is detachably connected to the housing (2).

10. A motor controller according to any one of claims 1 to 9, characterized in that: The inner wall of the base (1) has a second protrusion (101) arranged along its circumference.

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