Motor controller

Abstract

The utility model provides a motor controller. Each phase of bridge arm comprises two single tube modules. One single tube module is an upper tube module, and the other single tube module is a lower tube module; the direct-current copper bar of the single-tube module is connected with the bus capacitor unit through a copper bar; alternating current copper bars of the single-tube modules are connected with the output ends of the corresponding bridge arms; the types of any two adjacent single-tube modules in the power board are different; positive and negative copper bars are arranged in a staggered manner; that is to say, the upper and lower tube modules are arranged in a staggered manner, and the positive and negative copper bars are arranged in a staggered manner, thereby avoiding the problem of large stray inductance caused by concentrated arrangement of the modules of the same type, and reducing the stray inductance of the motor controller. And the stability of the motor controller is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of power electronics, and more specifically, particularly relates to a motor controller. Background Art

[0002] With the rapid development of technology, the performance requirements for power electronic controllers are also increasing day by day. The design and performance of power electronic controllers directly affect the efficiency and reliability of the system. Traditional power electronic controller designs face challenges such as power density, thermal management, and electromagnetic compatibility. To address these challenges, the industry has been continuously exploring new technologies and design solutions.

[0003] Currently, the electronic controller adopts the SIC-based power semiconductor single-tube parallel technology. Among them, the single tubes are arranged in an up-and-down tube in-line arrangement, and the in-line layout of the single tubes enables the positive and negative copper bars to be arranged separately.

[0004] However, the up-and-down tube in-line arrangement of the single tubes and the separate arrangement of the positive and negative copper bars will result in a relatively large stray inductance. Summary of the Utility Model

[0005] In view of this, the purpose of the utility model is to provide a motor controller, which is used to adopt an up-and-down tube staggered arrangement to reduce the stray inductance and improve the stability of the motor controller.

[0006] The embodiment of the present application provides a motor controller, including: a power board 101 and a bus capacitor unit 103;

[0007] The front surface of the power board 101 is provided with N-phase bridge arms;

[0008] N is a positive integer greater than 0;

[0009] Each phase bridge arm includes two single-tube modules, and the single tubes in the single-tube module are connected in parallel; the type of one single-tube module is an upper-tube module, and the type of the other single-tube module is a lower-tube module;

[0010] The DC copper bar of the single-tube module is connected to the bus capacitor unit 103 through a copper bar;

[0011] The AC copper bar of the single-tube module is connected to the output end of the corresponding bridge arm;

[0012] In the power board 101, the types of any two adjacent single-tube modules are different; and they are arranged in a positive and negative copper bar staggered manner.

[0013] Optionally, in the above-mentioned motor controller, in each of the single-tube modules:

[0014] M single tubes are arranged between the first DC copper bar and the AC copper bar;

[0015] In addition, M single tubes are arranged between the second DC copper bar and the AC copper bar;

[0016] M is a positive integer greater than 0.

[0017] Optionally, in the above-mentioned motor controller, a first capacitor is arranged between two adjacent first DC copper bars;

[0018] A second capacitor is arranged between two adjacent second DC copper bars.

[0019] Optionally, in the above-mentioned motor controller, the bottom of the copper bar of the power board 101 adopts a grid structure.

[0020] Optionally, in the above-mentioned motor controller, the top of the copper bar of the power board 101 adopts a mortise and tenon structure.

[0021] Optionally, in the above-mentioned motor controller, the positive and negative poles of the bus capacitor unit 103 are led out in a stacked form.

[0022] Optionally, in the above-mentioned motor controller, the bus capacitor unit 103 is arranged on the back of the power board 101.

[0023] Optionally, in the above-mentioned motor controller, each of the single tubes adopts a TO263 package.

[0024] Optionally, in the above-mentioned motor controller, a cooling system 102 is further included;

[0025] The cooling system 102 is arranged between the power board 101 and the bus capacitor unit 103.

[0026] Optionally, in the above-mentioned motor controller, the cooling system 102 includes: a pin fin heat dissipation device.

[0027] As can be seen from the above technical solutions, a motor controller provided by the present utility model, wherein each phase bridge arm includes two single-tube modules; the type of one single-tube module is an upper-tube module, and the type of the other single-tube module is a lower-tube module; the DC copper bars of the single-tube modules are connected to the bus capacitor unit 103 through copper bars; the AC copper bars of the single-tube modules are connected to the output ends of the corresponding bridge arms; the types of any two adjacent single-tube modules in the power board 101 are different; and they are arranged in an alternating manner of positive and negative copper bars; that is to say, the upper and lower tube modules are arranged alternately, and the positive and negative copper bars are arranged alternately, avoiding the problem of large stray inductance caused by the aggregated arrangement of the same type of modules, reducing the stray inductance of the motor controller; and improving the stability of the motor controller. Description of the Drawings

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0029] Figure 1 It is a schematic diagram of a motor controller provided by an embodiment of the present invention;

[0030] Figure 2 It is a schematic diagram of another motor controller provided by an embodiment of the present invention;

[0031] Figure 3 It is a schematic diagram of another motor controller provided by an embodiment of the present invention;

[0032] Figure 4 It is a schematic diagram of another motor controller provided by an embodiment of the present invention;

[0033] Figure 5 It is a schematic diagram of another motor controller provided by an embodiment of the present invention.

[0034] The description of the reference numerals is as follows:

[0035] 101 is the power board; 102 is the cooling system; 103 is the bus capacitor unit; 104 - 115 are all copper bars; 201 is the AC copper bar; 202 is the pin; 203 is the single tube; 204 and 205 are both single tube modules; 206 is the capacitor; 207 is the DC copper bar; 208 - 210 are all bridge arms; 301 is the mortise and tenon structure; 302 is the copper bar main body; 303 is the grid structure. Specific embodiments

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0037] In this application, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element. In addition, the terms "first", "second", "third", "fourth", etc. (if any) in the specification, claims and drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so that the embodiments of this application described herein can be implemented in an order other than those illustrated or described herein.

[0038] An embodiment of this application discloses a motor controller, which is used to solve the problem that the stray inductance is relatively large in the prior art due to the in-line arrangement of the upper and lower tubes of a single tube and the separate arrangement of the positive and negative copper bars.

[0039] Single-tube parallel connection: Multiple power tubes are connected in parallel in the same power circuit, and at the same time, the current and voltage of each single tube are made to achieve load balance.

[0040] Power density: The ratio of the power that a device can output to its volume.

[0041] Stray inductance: The unwanted equivalent inductance generated in a circuit due to electromagnetic induction, which usually causes interference and energy loss during signal transmission.

[0042] See Figure 1 , this motor controller includes: a power board 101 and a bus capacitor unit 103.

[0043] On the front side of the power board 101, an N-phase bridge arm is provided (for example, Figure 1 as shown by 208, 209 and 210 forming a three-phase bridge arm).

[0044] N is a positive integer greater than 0.

[0045] Specifically, N can be 3 or other values, which will not be elaborated one by one here. It depends on the actual situation and is within the protection scope of this application.

[0046] Each phase bridge arm includes two single-tube modules (for example, Figure 2 as shown by 204 and 205); the single tubes in the single-tube module are connected in parallel; the type of one single-tube module is the upper-tube module, and the type of the other single-tube module is the lower-tube module.

[0047] It should be noted that each individual transistor in the upper transistor module is an upper transistor; each individual transistor in the lower transistor module is a lower transistor. That is to say, the types of the individual transistors in the individual transistor module are the same.

[0048] As Figure 2 shown, it shows the power board 101 of the three-phase bridge arm; specifically, 208, 209, and 210 form the three-phase bridge arm. Taking the 208 arm as an example, it includes: the first individual transistor module 204 and the second individual transistor module 205; among them, 201 is an AC copper bar, 202 is a pin for receiving a drive signal for the transistor, 203 is a transistor, and 207 is a DC copper bar.

[0049] The DC copper bar 207 of the individual transistor module is connected to the bus capacitor unit 103 through a copper bar; the AC copper bar 201 of the individual transistor module is connected to the output end of the corresponding bridge arm.

[0050] To reduce costs, increase design flexibility, and improve power density, the motor controller can adopt a method of parallel connection of individual transistors for power module design. At the same time, higher requirements are imposed on low stray inductance and the like for the parallel connection of individual transistors. Therefore, by adopting the structure of the motor controller provided in this application, the stray inductance of the motor controller is reduced.

[0051] The AC copper bars 201 of the individual transistor modules in the same bridge arm can be connected; more specifically, it can be the same copper bar or two AC copper bars can be connected.

[0052] It should be noted that the bus capacitor unit 103 has a positive electrode and a negative electrode, and the polarity of the copper bar is related to the polarity of the bus capacitor unit 103 to which it is connected; for example, when the copper bar is connected to the negative electrode of the bus capacitor unit 103, this copper bar is a negative copper bar; when the copper bar is connected to the positive electrode of the bus capacitor unit 103, this copper bar is a positive copper bar.

[0053] The types of any two adjacent individual transistor modules in the power board 101 are different; and they are arranged in an alternating manner of positive and negative copper bars.

[0054] It should be noted that different types of modules need to be connected to different types of copper bars; for example, the upper transistor module needs to be connected to the positive copper bar, and the lower transistor module needs to be connected to the negative copper bar; of course, the connection relationship can also be swapped, which is not specifically limited here and can be determined according to the actual situation, and all are within the protection scope of this application.

[0055] Therefore, when the types of the individual transistor modules are staggered, the types of the copper bars are also staggered accordingly. That is to say, the upper and lower transistor modules are arranged in an alternating manner and the positive and negative copper bars are arranged in an alternating manner, which can reduce the stray inductance.

[0056] Specifically, as Figure 1As shown, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115 are the first copper busbar, the second copper busbar, the third copper busbar, the fourth copper busbar, the fifth copper busbar, the sixth copper busbar, the seventh copper busbar, the eighth copper busbar, the ninth copper busbar, the tenth copper busbar, the eleventh copper busbar, and the twelfth copper busbar respectively. Among them, the 1st, 3rd, 5th, 7th, 9th, and 11th copper busbars are positive DC copper busbars, and the 2nd, 4th, 6th, 8th, 10th, and 12th copper busbars are negative DC copper busbars, and the positive and negative copper busbars are arranged alternately. The copper busbar settings with other numbers of bridge arms are similar to Figure 1 and will not be elaborated here one by one.

[0057] In this embodiment, each phase bridge arm includes two single-tube modules; the type of one single-tube module is the upper-tube module, and the type of the other single-tube module is the lower-tube module; the DC copper bars of the single-tube module are connected to the bus capacitor unit through copper busbars; the AC copper bars of the single-tube module are connected to the output end of the corresponding bridge arm; the types of any two adjacent single-tube modules in the power board are different; and they are arranged in an alternating manner of positive and negative copper busbars; that is to say, the upper and lower tube modules are arranged alternately, and the positive and negative copper busbars are arranged alternately, avoiding the problem of large stray inductance caused by the aggregated arrangement of the same type of modules, reducing the stray inductance of the motor controller; and improving the stability of the motor controller.

[0058] It should be noted that usually, the upper and lower tubes are arranged in a straight line, and the copper busbars of the power board are arranged side by side. Specifically, the upper and lower tube modules are arranged in a straight line by type, and the copper busbars are also arranged side by side in positive and negative, resulting in a large stray inductance.

[0059] In this embodiment, the upper and lower tubes are arranged alternately, which can make the positive and negative copper busbars arranged alternately, better canceling the transient magnetic field generated when the positive and negative busbars pass current, thereby greatly reducing the stray inductance.

[0060] Optionally, referring to Figure 3 , each single-tube module includes 2M single tubes 203.

[0061] Specifically, in each single-tube module:

[0062] M single tubes 203 are arranged between the first DC copper bar 207 and the AC copper bar 201, and another M single tubes 203 are arranged between the second DC copper bar 207 and the AC copper bar 201.

[0063] M is a positive integer greater than 0; specifically, M can be equal to 3, and of course, it can also be other values. It will not be elaborated here one by one. It depends on the actual situation and is within the protection scope of this application.

[0064] That is to say, each single tube 203 is divided into two parts with equal quantities. Then, taking the AC copper bar 201 as the axis of symmetry, the two parts of single tubes 203 are respectively arranged on both sides of the AC copper bar 201. That is, the single tubes 203 in the single tube module are symmetrically arranged up and down.

[0065] That is to say, in order to achieve the optimal layout of the power board 101, the single tube module is evenly divided into two equal parts. Then, taking the AC copper bar 201 as the axis of symmetry, these two parts of single tubes 203 are respectively arranged on both sides of the AC copper bar 201 in a clever way. This design not only ensures the up-and-down symmetry of the single tube module, but also helps to improve the balance and overall performance of the circuit.

[0066] Through this symmetrical layout, the consistency of the electrical characteristics of each half module can be ensured, thus reducing potential problems caused by asymmetrical layout, such as electromagnetic interference, uneven heat distribution, and uneven current shunting. In addition, the up-and-down symmetrical layout also helps to simplify the wiring and maintenance work, improving the reliability and maintainability of the system.

[0067] This layout method not only reflects the pursuit of the design aesthetics of power electronic devices, but also demonstrates in-depth consideration of circuit performance and reliability. Through careful design, it can be ensured that each single tube module can work in the best state, providing stable and efficient power transmission for the entire system.

[0068] Specifically, taking the example that each single tube module includes 6 single tubes 203 for illustration; when the single tube module includes other quantities of single tubes 203, its structure and working process are similar to those when each single tube module includes 6 single tubes 203, and will not be elaborated here one by one.

[0069] 204 is the first single tube module, 205 is the second single tube module. The first single tube module 204 is the upper tube module, and the second single tube module 205 is the lower tube module. However, the 2N single tube modules in the N phase should be arranged in an alternating pattern of upper and lower tube modules.

[0070] The first single tube module 204 includes 6 single tubes 203, and the second single tube module 205 includes 6 single tubes 203; and the 6 single tubes 203 are arranged symmetrically up and down; specifically, there are 3 single tubes 203 arranged between the AC copper bar 201 and the first DC copper bar; there are 3 single tubes 203 arranged between the AC copper bar 201 and the second DC copper bar 207. 207 is the second DC copper bar and the first DC copper bar, and no label distinction is made between the second DC copper bar and the first DC copper bar.

[0071] As Figure 3 shown, it shows a schematic diagram of the single tube module. Figure 2 It can include 6 Figure 3The single-tube module shown; the DC copper bar 207 is connected to the bus capacitor unit 103 through a copper busbar to ensure stable current transmission. After the AC copper bar 201 is welded to the copper busbar, it serves as the three-phase AC output of the motor controller. The pin 202 is connected to the main control board to provide a drive signal for the single tube 203, optimizing the control accuracy and response speed of the entire system.

[0072] In this embodiment, a symmetric layout strategy is adopted, and each single tube is symmetrically arranged on the substrate to improve the current sharing performance. By reducing the potential problems caused by uneven current distribution, the reliability and efficiency of the system are significantly improved. Through careful layout and component selection, each part of the system can work together with the highest efficiency, providing a powerful and stable power support platform for the motor controller.

[0073] Optionally, as Figure 3 shown, a first capacitor 206 is provided between two adjacent first DC copper bars 207; a second capacitor 206 is provided between two adjacent second DC copper bars 207. 206 is the first capacitor and the second capacitor, and no label distinction is made between the first capacitor and the second capacitor.

[0074] Specifically, one end of the first first DC copper bar 207 is connected to one end of the second first DC copper bar 207 through the first first capacitor 206; the other end of the second first DC copper bar 207 is connected to one end of the third first DC copper bar 207 through the second first capacitor 206; and so on. The other end of the (2N - 1)th first DC copper bar 207 is connected to one end of the 2Nth first DC copper bar 207 through the (2N - 1)th first capacitor 206.

[0075] Specifically, one end of the first second DC copper bar 207 is connected to one end of the second second DC copper bar 207 through the first second capacitor 206; the other end of the second second DC copper bar 207 is connected to one end of the third second DC copper bar 207 through the second second capacitor 206; and so on. The other end of the (2N - 1)th second DC copper bar 207 is connected to one end of the 2Nth second DC copper bar 207 through the (2N - 1)th second capacitor 206.

[0076] The first capacitor 206 and the second capacitor 206 can be capacitors with the same parameters, or of course, capacitors with different parameters. Details are not elaborated here, and they are all within the protection scope of this application.

[0077] The first DC copper bar 207 and the second DC copper bar 207 can be the same copper bar or different copper bars. Details are not elaborated here, and they are all within the protection scope of this application.

[0078] The capacitor can be a ceramic capacitor, an electrolytic capacitor, etc. When selecting a capacitor, factors such as the operating frequency of the circuit, the required filtering performance, the stability of the capacitor, and its temperature characteristics need to be considered. Specific limitations are not provided here.

[0079] As can be seen from the above description, a strategic layout is adopted in the motor controller to optimize the smoothness of the current and the dynamic response of the system. Specifically, a first capacitor 206 is provided between two adjacent first DC copper bars 207. This configuration not only helps reduce voltage fluctuations in the power line but also improves the stability of the entire power supply system.

[0080] Similarly, a second capacitor 206 is arranged between two adjacent second DC copper bars 207. This further enhances the decoupling ability of the system and effectively filters out high-frequency noise that may affect the system performance. Through this dual-capacitor configuration, we ensure that the power line maintains a high level of stability and reliability under various load conditions.

[0081] In addition, the physical layout and electrical parameters of the capacitor can also be considered to achieve the best filtering effect and minimize parasitic effects. The selection and placement of the capacitors are carefully calculated and optimized to ensure that they can provide the required decoupling performance in high-frequency applications while maintaining the compactness and cost-effectiveness of the system.

[0082] Through this capacitor layout, not only is the high-performance standard achieved technically, but the stability and reliability of the system are also demonstrated in practical applications.

[0083] In this embodiment, setting the capacitor can provide a filtering function to reduce noise and ripple.

[0084] Optionally, as Figure 4 shown, the bottom of the copper bars of the power board 101 adopts a grid structure 303.

[0085] Specifically, the bottoms of both the DC copper bars 207 and the AC copper bars 201 of the power board 101 can adopt the grid structure 303.

[0086] Adopting a grid design can reduce stray inductance.

[0087] The grid structure 303 optimizes the flow of current and reduces the inductance effect.

[0088] Specifically, the advantage of the grid design is that it can evenly distribute the current, reduce the concentration of the electromagnetic field caused by current concentration, and thus reduce stray inductance. This design not only improves the electromagnetic compatibility (EMC) of the circuit but also helps reduce electromagnetic interference (EMI), providing a more stable and reliable working environment for high-frequency applications.

[0089] In addition, the grid design also has a high degree of flexibility and scalability. It can be adjusted according to different application requirements and can provide customized solutions whether in a compact space or in a situation where a large amount of current needs to be transmitted.

[0090] Optionally, the top of the copper strip of the power board 101 adopts a mortise and tenon structure 301.

[0091] It can be that the bottoms of the DC copper strip 207 and the AC copper strip 201 of the power board 101 both adopt the mortise and tenon structure 301.

[0092] Specifically, as Figure 3 shown, the bottom of the AC copper strip 201 adopts a grid design, which can reduce stray inductance and is convenient for welding. The top adopts a mortise and tenon design, which is convenient for welding with the top bus bar. The bottom of the DC copper strip 207 adopts a grid design, which can reduce stray inductance and is convenient for welding. The top adopts a mortise and tenon design, which is convenient for welding with the top bus bar.

[0093] As Figure 4 shown, it shows a schematic diagram of the structure of the copper strip; where 301 is the mortise and tenon structure, the function of which is to weld the bus bar, 302 is the copper strip body, and 303 is the grid structure, which can reduce parasitic inductance.

[0094] The mortise and tenon structure is convenient for welding, and the seismic resistance of the welding is higher than that of direct plane welding.

[0095] In modern welding technology, drawing on the wisdom of the ancient mortise and tenon structure, an innovative connection technology is adopted to improve the seismic performance and overall stability of the welded joint. Compared with traditional plane welding, the introduction of the mortise and tenon structure provides more mechanical interlocking points for welding, thus significantly enhancing the firmness of the connection.

[0096] The design of the mortise and tenon structure allows the welding material to form a complex geometric interlock at the joint, which not only makes the welding points bear the force more evenly, but also can disperse and absorb energy when subjected to vibration or impact. The self - adaptability of this structure enables the welded joint to show higher durability and reliability under dynamic loads.

[0097] In addition, the welding of the mortise and tenon structure also has the advantage of easy operation. Due to its special geometric shape, the heat - affected area during the welding process is smaller, and the risk of welding deformation and stress concentration is reduced, thus simplifying the welding process and improving production efficiency.

[0098] Optionally, the positive and negative electrodes of the bus capacitor unit 103 are led out in a stacked form.

[0099] Specifically, the positive and negative electrodes of the busbar capacitor unit 103 are led out in a stacked form. Of course, insulation treatment is carried out between the positive and negative electrodes, and insulating paper or other insulating materials can be used and arranged between the positive and negative electrodes.

[0100] The positive and negative electrodes of the capacitor are led out in the form of stacked positive and negative copper bars. When approaching the power board 101, pins are branched out and welded to the copper bars of the power board 101, thereby reducing stray inductance. An insulating device is arranged between the positive copper bar and the negative copper bar.

[0101] Leading out the positive and negative electrodes of the capacitor in a stacked form not only optimizes space utilization but also enhances the compactness of the overall structure. The close arrangement between the positive and negative electrodes achieves higher energy density and better electrical performance. Of course, to ensure electrical safety, strict insulation treatment is implemented between the positive and negative electrodes. High-performance insulating paper or other insulating materials can be selected. These materials not only have good insulation performance but also excellent mechanical strength and heat resistance, ensuring reliability under various working conditions.

[0102] Effectively isolates the electrical connection between the positive and negative electrodes, preventing potential short-circuit risks. At the same time, the application of insulating materials also helps reduce electromagnetic interference and improves the electromagnetic compatibility (EMC) of the entire capacitor unit.

[0103] In addition, the convenience of maintenance and upgrade can also be considered. With the easy replaceability and compatibility of insulating materials, the maintenance of the busbar capacitor unit 103 becomes more convenient during long-term use, extending the service life of the product.

[0104] Direct connection of copper bars results in relatively large stray inductance, while in this application, pins are branched out from the copper bars and welded to the copper bars of the power board 101 to further reduce stray inductance.

[0105] Optionally, the busbar capacitor unit 103 is arranged on the back of the power board 101.

[0106] That is to say, each phase bridge arm is arranged on the front of the power board 101, and the busbar capacitor unit 103 is arranged on the back of the power board 101. Therefore, compared with the busbar capacitor unit 103 being arranged on the side of the power board 101, arranging the busbar capacitor unit 103 on the back of the power board 101 can reduce the flat area of the motor controller.

[0107] This flat area can be understood as the top view area; when placed sideways, the capacitor and the power board 101 are horizontally arranged and the top view area becomes larger, which is a cuboid with a large flat area and is not conducive to integration with the power system. After being stacked up and down, the flat area is small, which is conducive to placement and the layout of the motor controller.

[0108] The busbar capacitor unit 103 is arranged perpendicular to the power board 101, avoiding the interleaved arrangement of DC busbars and AC busbars. The DC busbars and AC busbars are separately arranged, further reducing the stray inductance.

[0109] Optionally, each single transistor is packaged in TO263.

[0110] MOSFET and IGBT single transistors with TO263 packaging can be used. This TO263 packaging has characteristics such as small volume, good heat dissipation performance, good electrical performance, and many replaceable products. The TO263 packaging improves the power density and also provides sufficient electrical isolation, thus ensuring the reliability and stability of the system.

[0111] The MOSFET can be a SIC MOSFET.

[0112] Using IGBTs with TO263 packaging can further reduce costs.

[0113] In this embodiment, using MOSFET packaging has a large volume and poor heat dissipation performance; while using TO263 packaging has characteristics such as small volume, good heat dissipation performance, and good electrical performance.

[0114] Optionally, it further includes a cooling system 102.

[0115] As Figure 5 shown, the cooling system 102 is arranged between the power board 101 and the busbar capacitor unit 103.

[0116] That is to say, the power board 101, the cooling system 102, and the busbar capacitor unit 103 adopt a vertical distribution design, which can thus reduce the volume and increase the power density. The cooling system 102 uses PINFIN water cooling for heat dissipation.

[0117] Optionally, the cooling system 102 includes: a pin-fin heat dissipation device.

[0118] Of course, the cooling system 102 can also use other cooling devices, such as a water cooling device or an air cooling device, etc. which will not be elaborated here one by one and are all within the protection scope of this application.

[0119] The features described in the various embodiments in this specification can be replaced or combined with each other. For the same or similar parts among the various embodiments, reference can be made to each other. Each embodiment focuses on the differences from other embodiments. In particular, for a system or system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and reference can be made to the corresponding part of the method embodiment for the relevant content. The systems and system embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. A person of ordinary skill in the art can understand and implement it without creative work.

[0120] Those skilled in the art can further realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be implemented by electronic hardware, computer software, or a combination of the two. To clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described according to functions in the above description. Whether these functions are executed in a hardware or software manner depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present invention.

[0121] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A motor controller, characterized in that: include: Power board and busbar capacitor unit; An N-phase bridge arm is arranged on the front side of the power board; N is a positive integer greater than 0; Each phase bridge arm includes two single-tube modules, and each single tube in the single-tube module is connected in parallel; one single-tube module is an upper tube module, and the other single-tube module is a lower tube module; The DC copper bar of the single-tube module is connected to the busbar capacitor unit via a copper busbar; The AC copper bar of the single-tube module is connected to the output end of the corresponding bridge arm; Any two adjacent single-tube modules in the power board are of different types; and the positive and negative copper bars are arranged in an alternating manner.

2. The motor controller according to claim 1, characterized in that: In each of the single-tube modules: M single tubes are arranged between the first DC copper bar and the AC copper bar; In addition, M single tubes are arranged between the second DC copper bar and the AC copper bar; M is a positive integer greater than 0.

3. The motor controller according to claim 2, characterized in that: A first capacitor is arranged between two adjacent first DC copper bars; A second capacitor is arranged between two adjacent second DC copper bars.

4. The motor controller according to claim 1, characterized in that: The bottom of the copper strip of the power board adopts a grid structure.

5. The motor controller according to claim 1, characterized in that: The top of the copper strip of the power board adopts a mortise and tenon structure.

6. The motor controller according to claim 1, characterized in that: The positive and negative electrodes of the busbar capacitor unit are led out in a stacked form.

7. The motor controller according to claim 1, characterized in that: The busbar capacitor unit is arranged on the back side of the power board.

8. The motor controller according to claim 1, characterized in that: Each of the single tubes is packaged in TO263.

9. The motor controller according to claim 1, characterized in that: Also includes cooling system; The cooling system is arranged between the power board and the bus capacitor unit.

10. The motor controller according to claim 9, characterized in that: The cooling system includes: a pin-fin heat sink.

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