High-power underwater liquid storage motor driver

Abstract

The invention relates to a high-power underwater liquid storage motor driver. The high-power underwater liquid storage motor driver comprises a motor driver shell, a first bolt structure, a first sealing ring, a liquid medium, a plug, a silicon carbide driving module, a mounting panel, a binding post, an insulating flange and a cabin penetrating shell. The top end of the motor driver shell and the bottom end of the motor shell are in buckled butt joint and are fixed through a first bolt structure and sealed through a first sealing ring to form an independent cavity, compact installation is achieved, and the pressure-resistant and waterproof performance is improved. The liquid injection port and the exhaust port are arranged outside the shell, through control of the plug, after liquid media are injected into the cavity, the motor shaft can be lubricated, waste heat can be absorbed, circulating heat dissipation can be achieved, residual gas is exhausted through the exhaust port, and uniform distribution of liquid is guaranteed. The silicon carbide power driving module is mounted on the panel after being coated with the heat conduction material, the heat dissipation efficiency is remarkably improved, and meanwhile the size is reduced. The binding post is fixed on the cabin-penetrating shell through the insulating flange, electric and liquid isolation is achieved through multi-layer sealing, and safety and sealing are ensured.

Description

Technical Field

[0001] This application relates to the field of motor driver technology, and in particular to a high-power underwater liquid storage motor driver. Background Technology

[0002] With the continuous development of marine activities, the performance requirements for underwater equipment are increasing. Underwater special propulsion motors, as key propulsion components for underwater robots, torpedoes, and other equipment, are of paramount importance. The motor driver, as the core device for controlling and driving the underwater motor, directly affects the overall performance and reliability of the underwater equipment.

[0003] Existing high-power underwater motor drives generally suffer from key drawbacks such as low heat dissipation efficiency and complex structure, making it difficult to meet the requirements of high-power underwater applications that require deep-sea, long-cycle, and highly reliable operation. The limitations of existing technologies are even more pronounced in applications that require compact installation space (such as integration within propulsion pods or underwater production equipment). Summary of the Invention

[0004] To overcome, to at least some extent, the problems of low heat dissipation efficiency and complex structure that are common in high-power underwater motor drivers in related technologies, this application provides a high-power underwater liquid storage motor driver.

[0005] The proposed solution is as follows: A high-power underwater liquid storage motor driver, comprising: Motor driver housing, first bolt structure, first sealing ring, liquid medium, plug, silicon carbide drive module, mounting panel, terminal block, insulating flange and through-chamber housing; The top end of the motor driver housing is fastened to the bottom end of the motor housing, and a cavity is formed between the motor driver housing and the motor housing after the fastening connection. The first bolt structure secures the fastening connection between the motor driver housing and the motor housing; The first sealing ring seals the snap-fit ​​connection between the motor driver housing and the motor housing; The motor driver housing has an injection port and an exhaust port on its outer side; The injection port and the exhaust port are connected to the cavity through a built-in pipe in the motor driver housing; The plug includes an injection plug and an vent plug, with the injection plug located on the injection port and the vent plug located on the vent port. The liquid medium is injected into the cavity through the injection port; the exhaust port is used to expel gas from the cavity. After the surface of the silicon carbide drive module is coated with a thermally conductive material, it is mounted on the mounting panel; the mounting panel is installed inside the motor driver housing. The terminals are respectively connected to the lead-out cables of the silicon carbide drive module and the lead-out cables of the motor; The terminal block is fixedly installed on the transom shell via an insulating flange; The transom shell is installed inside the cavity, and the transom shell is sealed by a multi-layer sealing structure.

[0006] Preferably, the top end of the motor driver housing has a first annular edge; The bottom end of the motor housing has a second annular edge; The outer diameter of the first annular edge is the same as the inner diameter of the second annular edge; The top end of the motor driver housing and the bottom end of the motor housing are fastened together by the first annular edge and the second annular edge.

[0007] Preferably, it further includes: Two second sealing rings; The second sealing ring is disposed at the injection port and the vent port to seal the injection port and the vent port.

[0008] Preferably, it further includes: Multiple heat sinks; The heat sink is detachably mounted on the inner side and bottom side of the motor driver housing; The heat sink on the inner side of the motor driver housing is mounted close to the mounting panel.

[0009] Preferably, it further includes: Sacrificial anode, plug assembly, and grounding wire; The motor driver housing includes: a bottom cover; The bottom cover is foldably mounted on the bottom end of the motor driver housing; The sacrificial anode, plug assembly, and grounding wire are mounted on the bottom cover.

[0010] Preferably, it further includes: The third, fourth, and fifth sealing rings; The third sealing ring is disposed between the terminal and the insulating flange for sealing the terminal; The fourth sealing ring is disposed on the outside of the insulating flange and is used to seal the insulating flange; The fifth sealing ring is disposed on the outside of the transom shell and is used to seal the transom shell.

[0011] Preferably, it further includes: Second bolt structure; The motor driver housing also includes: a top cover; The second bolt structure is used to secure the through-cabin housing to the top cover of the electrical drive housing.

[0012] Preferably, the lead-out cables of the silicon carbide drive module include: Three-phase cables and resolver cables; The three-phase cables and the resolver cables are treated with a vulcanization process for waterproofing.

[0013] Preferably, the mounting panel is installed inside the motor driver housing via a sealing strip, which is used for planar sealing and waterproofing.

[0014] Preferably, the motor driver housing has a cylindrical structure.

[0015] The technical solution provided in this application may include the following beneficial effects: The top of the motor driver housing is fastened to the bottom of the motor housing, achieving axial docking between the motor driver and the motor. This is secured by a first bolt structure and sealed with a first sealing ring, forming an independent cavity. This design ensures a compact installation of the motor driver and the motor, while the sealed structure enhances the overall pressure and water resistance, making it suitable for deep-sea environments.

[0016] The outer side of the housing is designed with a liquid injection port and a vent, which can be opened and closed in a controlled manner through plugs. When liquid medium is injected into the cavity, it creates a liquid cooling environment, lubricating the motor shaft and absorbing excess heat generated by the motor through internal circulation, thus dissipating heat. The vent allows residual gas inside the cavity to escape, preventing air blockage, ensuring uniform liquid distribution, and improving heat dissipation efficiency.

[0017] The drive module uses silicon carbide power devices, which are coated with thermally conductive material and then mounted on a mounting panel, significantly improving the module's heat dissipation efficiency and solving the problem of heat dissipation difficulties for high-power drivers. At the same time, the silicon carbide drive module itself has a high degree of integration, which can significantly reduce the system size and overall dimensions.

[0018] The terminal blocks are used to connect the lead cables of the silicon carbide drive module and the motor, and are fixedly mounted on the through-chamber housing via insulating flanges. The insulating flanges and through-chamber housing employ a multi-layer sealing structure to isolate the electrical connection from the liquid cavity, ensuring electrical safety while preventing liquid leakage. The through-chamber housing design ensures that the overall seal is maintained even when the cables pass through the housing.

[0019] The drive housing and motor housing are snapped together to form an integrated cavity, reducing external piping and additional cooling devices. The through-hull shell and multi-layer sealing ensure the safe exit of cables without increasing volume. The overall structure is simplified and the size is reduced, making it suitable for the confined spaces of propulsion pods or underwater equipment.

[0020] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0021] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0022] Figure 1 This is a cross-sectional structural schematic diagram of a high-power underwater liquid storage motor driver provided in one embodiment of this application; Figure 2 This is a schematic diagram of the structure of a silicon carbide drive module and a mounting panel provided in one embodiment of this application; Figure 3 This is a schematic diagram of a plug structure provided in one embodiment of this application; Figure 4 This is a schematic diagram of the unfolded structure of a through-hull shell provided in one embodiment of this application; Figure 5 This is a schematic diagram of a heat sink structure provided in one embodiment of this application; Figure 6 This is a schematic diagram of the bottom cover structure of a motor driver housing according to one embodiment of this application; Figure 7 This is a schematic diagram of the lead cable structure of a silicon carbide driver module provided in one embodiment of this application.

[0023] Reference numerals: Motor driver housing - 1; First bolt structure - 2; Motor housing - 3; First sealing ring - 4; Cavity - 5; Liquid medium - 6; Plug - 7; Injection plug - 71; Exhaust plug - 72; Second sealing ring - 8; Silicon carbide drive module - 9; Mounting panel - 10; Sacrificial anode - 11; Bottom cover - 12; Terminal block - 13; Insulating flange - 14; Third sealing ring - 15; Fourth sealing ring - 16; Through-chamber housing - 17; Fifth sealing ring - 18; Second bolt structure - 19; Top cover - 20. Detailed Implementation

[0024] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application.

[0025] Figure 1 This is a cross-sectional structural schematic diagram of a high-power underwater liquid storage motor driver according to an embodiment of this application, with reference to... Figure 1A high-power underwater liquid storage motor driver, comprising: Motor driver housing 1, first bolt structure 2, first sealing ring 4, liquid medium 6, plug 7, silicon carbide drive module 9, mounting panel 10, terminal block 13, insulating flange 14 and through-chamber housing 17; The top end of the motor driver housing 1 is fastened to the bottom end of the motor housing 3, and after the fastening connection, a cavity 5 is formed between the motor driver housing 1 and the motor housing 3; The first bolt structure 2 secures the fastening connection between the motor driver housing 1 and the motor housing 3; The first sealing ring 4 seals the snap-fit ​​connection between the motor driver housing 1 and the motor housing 3; The motor driver housing 1 has an injection port and an exhaust port on its outer side; The injection port and the vent port are connected to the cavity 5 through the built-in pipe of the motor driver housing 1; The plug 7 includes an injection plug 71 and an vent plug 72. The injection plug 71 is located on the injection port, and the vent plug 72 is located on the vent port. Liquid medium 6 is injected into cavity 5 through injection port; exhaust port is used to discharge gas from cavity 5; After the silicon carbide drive module is coated with a thermally conductive material, it is mounted on the mounting panel 10; the mounting panel 10 is installed inside the motor driver housing 1. Terminal 13 is connected to the lead-out cable of the silicon carbide drive module and the lead-out cable of the motor, respectively; Terminal 13 is fixedly mounted on the through-cabin housing 17 via insulating flange 14; The through-cabin shell 17 is installed inside the cavity 5, and the through-cabin shell 17 is sealed by a multi-layer sealing structure.

[0026] In practice, the motor driver housing 1 is a cylindrical structure. The cylindrical shape ensures uniform stress distribution on the curved surface underwater, with no significant stress concentration; it also requires less material for the same pressure resistance; the curved surface is more stable under pressure and less prone to deformation. The direct connection between the cylindrical motor driver and the motor improves the integration of the connection and saves space.

[0027] Because the motor drive needs to operate in seawater at a depth of 600 meters (maximum external pressure 6 MPa), rust-resistant aluminum with a certain degree of corrosion resistance is preferably used as the main material for the motor drive housing 1, with a yield strength of approximately 260 MPa. It can withstand an underwater external pressure of 6 MPa. The surface is anodized, and further surface protection is applied to the main exposed surfaces of the product housing.

[0028] Preferably, modified silane paint is used as the coating material for the product end caps and exposed surfaces of the shell. This paint has strong adhesion, high toughness, impact resistance, and excellent resistance to chemical corrosion such as salt spray, oil, acid and alkali, and seawater.

[0029] Liquid medium 6 can be, but is not limited to, electrically insulating oils (silicone oil), fluorinated liquids, etc. Silicone oil has excellent dielectric properties, high chemical stability, good resistance to high and low temperatures, and is not easily volatile. Fluorinated liquids have excellent electrical insulation, strong chemical inertness, low viscosity, good thermal conductivity, and high latent heat of vaporization. They are often used for cooling high-reliability electronic equipment to avoid electrochemical corrosion.

[0030] In this embodiment, silicon carbide (SiC) is used as the driving module. As a wide-bandgap semiconductor material, SiC exhibits significant advantages in harsh applications such as high temperature, high pressure, and high frequency due to its unique physical and chemical properties. Compared with ordinary Si devices, it improves the switching frequency, power density, and energy utilization efficiency of the electronic system, meeting the requirements of lightweight and miniaturization. Before mounting the SiC onto the mounting panel 10, the mounting surface is coated with a special superconducting thermal material. The mounting panel 10 is threadedly fastened to the cylindrical housing of the controller. Heat dissipation fins are provided at corresponding positions on the bottom of the housing to increase the heat dissipation surface and achieve better heat dissipation. A schematic diagram of the installation connection between the SiC driving module and the mounting panel 10 is shown below. Figure 2 As shown.

[0031] In practice, the silicon carbide drive module in this embodiment is a 1200 V CoolSiC™ MOSFET dual-transistor module, measuring 62 mm in size, operating at 1200 V, and employing a 2mΩ half-bridge design. It internally incorporates CoolSiC™ MOSFET chips. The operating temperature is -40℃ to 150℃, VDSS = 1200V; IDnom = 500A / IDRM = 1000A.

[0032] Reference Figure 3 The plug 7 includes an injection plug 71 and an exhaust plug 72. The injection plug 71 is located on the injection port, and the exhaust plug 72 is located on the exhaust port. After the injection plug 71 and the exhaust plug 72 are removed, the injection port and the exhaust port are opened. The injection port is used to inject liquid medium 6, and the exhaust port is used to discharge excess gas in the cavity 5 during the injection of liquid medium 6.

[0033] Figure 4 This is a schematic diagram of the unfolded structure of the through-cabin housing 17. The terminal block 13 is connected to the lead cable of the silicon carbide drive module and the lead cable of the motor, respectively. Then the terminal block 13 is fixedly installed on the through-cabin housing 17 through the insulating flange 14. Finally, the through-cabin housing 17 is installed in the cavity 5, and the through-cabin housing 17 is sealed by a multi-layer sealing structure.

[0034] Reference Figure 4 The high-power underwater liquid storage motor driver also includes: Second bolt structure 19; The motor driver housing 1 also includes: a top cover 20; The second bolt structure 19 is used to secure the through-cabin housing 17 to the top cover 20 of the electrical drive housing.

[0035] During assembly, the second bolt structure 19, through the pre-tightening force, makes the through-chamber housing 17 and the driver housing fit tightly together, while pressing the sealing ring between them to form a stable sealing effect.

[0036] In this embodiment, the high-power underwater liquid storage motor driver has its top end of the motor driver housing 1 fastened to the bottom end of the motor housing 3, achieving axial docking between the motor driver and the motor. It is then fixed by a first bolt structure 2 and sealed by a first sealing ring 4, forming an independent cavity 5. This ensures a compact installation of the motor driver and the motor, while the sealed structure improves the overall pressure and water resistance, making it suitable for deep-sea environments.

[0037] The outer side of the housing is designed with a liquid injection port and a vent, which can be opened and closed in a controlled manner through a plug 7. Liquid medium 6 is injected into the cavity 5, creating a liquid cooling environment that lubricates the motor shaft and absorbs excess heat generated by the motor through internal circulation, thus dissipating heat. The vent allows residual gas inside the cavity 5 to escape, preventing air blockage, ensuring uniform liquid distribution, and improving heat dissipation efficiency.

[0038] The drive module uses silicon carbide power devices, which are coated with thermally conductive material and then mounted on the mounting panel 10, significantly improving the module's heat dissipation efficiency and solving the problem of heat dissipation difficulties for high-power drivers. At the same time, the silicon carbide drive module itself has a high degree of integration, which can significantly reduce the system size and overall dimensions.

[0039] Terminal 13 is used to connect the lead cables of the silicon carbide drive module and the motor, and is fixedly mounted on the through-chamber housing 17 via insulating flange 14. The insulating flange 14 and the through-chamber housing 17 adopt a multi-layer sealing structure to isolate the electrical connection from the liquid cavity 5, ensuring electrical safety and preventing liquid leakage. The through-chamber housing 17 is designed to maintain overall sealing even when the cable passes through the housing.

[0040] The drive housing and motor housing 3 are snapped together to form an integrated cavity 5, reducing external piping and additional cooling devices. The through-hull housing 17 and multi-layer seals ensure the safe exit of cables without increasing volume. The overall structure is simplified and the size is reduced, making it suitable for the confined spaces of propulsion pods or underwater equipment.

[0041] Example 2 It should be noted that the top of the motor driver housing 1 has a first annular edge; The bottom end of the motor housing 3 has a second annular edge; The outer diameter of the first annular edge is the same as the inner diameter of the second annular edge; The top end of the motor driver housing 1 and the bottom end of the motor housing 3 are fastened together by the first annular edge and the second annular edge.

[0042] like Figure 1 As shown, the top end of the motor driver housing 1 has a first annular edge, and the bottom end of the motor housing 3 has a second annular edge. The top end of the motor driver housing 1 and the bottom end of the motor housing 3 are fastened together by the first and second annular edges. Through the above structural design, the motor driver housing 1 and the motor housing 3 can achieve a stable annular engagement when they are docked, thereby enhancing the mechanical strength and sealing performance of the connection part while forming the cavity 5.

[0043] This ring-shaped fastening structure achieves a "slot-like" positioning and fixing function during installation through the precise dimensional matching of the first and second ring edges. While cooperating with the first bolt structure 2 and the first sealing ring 4, it significantly reduces offset errors during installation, resulting in a tighter and more secure connection between the motor driver housing 1 and the motor housing 3.

[0044] Example 3 It should be noted that the high-power underwater liquid storage motor driver also includes: Two second sealing rings 8; The second sealing ring 8 is installed at the injection port and the vent port to seal the injection port and the vent port.

[0045] Reference Figure 1 The second sealing ring 8 is respectively installed at the injection port and the vent port to reliably seal them when the injection port and the vent port are closed. Specifically, the second sealing ring 8 is embedded in the inner wall groove of the injection port and the vent port. When the plug 7 is tightened or installed in place, the sealing ring is compressed and undergoes elastic deformation, thereby filling the interface gap and achieving isolation between the liquid and the external environment.

[0046] The injection port and vent port are important channels for the liquid medium 6 to enter and exit the cavity 5. If they are not sealed properly, seawater backflow or liquid leakage can easily occur, affecting the stability of the liquid medium 6 inside the actuator. By setting a second sealing ring 8 at the injection port and vent port, a reliable annular sealing interface can be formed when the plug 7 is installed, thereby ensuring the sealing performance and long-term stability of the channel in the non-operating state.

[0047] Example 4 It should be noted that the high-power underwater liquid storage motor driver also includes: Multiple heat sinks; The heat sink is detachably mounted on the inner side and bottom side of the motor driver housing 1; The heat sink on the inner side of the motor driver housing 1 is mounted close to the mounting panel 10.

[0048] The specific structure of the heat sink is as follows Figure 5 As shown, Figure 5 The heat sink shown is the heat sink inside the motor driver housing 1. The heat sink inside the motor driver housing 1 is installed close to the mounting panel 10 to directly absorb the heat transferred by the silicon carbide drive module through the mounting panel 10, thereby improving the timeliness and uniformity of heat dissipation.

[0049] When the silicon carbide drive module generates heat during operation, the heat is first conducted to the heat sink through the thermally conductive coating and mounting panel 10, and then transferred to the motor driver housing 1 through the heat sink, achieving rapid heat exchange.

[0050] The heat sink can be detached and installed by means of bolt connection, slot fitting or thermal adhesive bonding, which not only ensures tight contact between the heat sink and the shell, but also facilitates later replacement or maintenance.

[0051] Example 5 It should be noted that, referring to Figure 6 The high-power underwater liquid storage motor driver also includes: Sacrificial anode 11, plug assembly and grounding wire; The motor driver housing 1 includes: a bottom cover 12; The bottom cover 12 is foldably mounted on the bottom end of the motor driver housing 1; The sacrificial anode 11, plug assembly and grounding wire are mounted on the bottom cover 12.

[0052] To prevent inevitable scratches, wear, pinholes, or aging failure points in the coating during installation, transportation, and use, a sacrificial anode 11 is added. This utilizes the difference in electrochemical activity between the metals to connect a more negatively charged magnesium alloy to the motor drive structure requiring protection. The sacrificial anode 11 provides "backup" protection in these damaged or weakened areas of the coating, forming a dual protection system of "coating + cathodic protection," ensuring that even if the coating fails locally, the metal substrate will not corrode rapidly. The system boasts high reliability and low maintenance requirements, making it particularly suitable for harsh environments and difficult-to-maintain underwater applications. Minimal intervention is required after installation until the anode is depleted.

[0053] The plug assembly provides a reliable electrical interface for the drive, simplifying the installation and removal of underwater equipment.

[0054] Grounding wires are used to form an effective grounding loop to avoid electrical safety hazards caused by underwater high-voltage electrical interference or leakage.

[0055] Example 6 It should be noted that, referring to Figure 4 The high-power underwater liquid storage motor driver also includes: Third sealing ring 15, fourth sealing ring 16 and fifth sealing ring 18; The third sealing ring 15 is disposed between the terminal 13 and the insulating flange 14 to seal the terminal 13; The fourth sealing ring 16 is disposed on the outside of the insulating flange 14 and is used to seal the insulating flange 14; The fifth sealing ring 18 is provided on the outside of the through-hull shell 17 and is used to seal the through-hull shell 17.

[0056] like Figure 4 As shown, terminal 13, insulating flange 14, and the through-chamber housing 17 form the transition area between the liquid cavity 5 and the external environment of the cable, posing a high risk of leakage. By installing third, fourth, and fifth sealing rings 18 at different locations, a multi-layered sealing structure is formed from the inside out. The third sealing ring 15 prevents liquid from seeping out from the gap between the terminal 13 and the insulating flange 14; The fourth sealing ring 16 further seals any possible leakage paths around the insulating flange 14; The fifth sealing ring 18 forms the final barrier at the junction of the shell and the transom shell 17.

[0057] By using triple sealing rings, a multi-layered, multi-path barrier is formed, avoiding overall leakage caused by the failure of a single sealing point. This graded sealing design greatly improves the reliability of the overall seal.

[0058] Preferably, the multi-layer sealing ring is made of an elastic material that is resistant to seawater corrosion and high pressure. During the assembly process, pre-pressure is generated by bolts or a clamping structure, causing the sealing ring to undergo elastic deformation, thereby filling the joint gap and enhancing the sealing performance.

[0059] Example 7 It should be noted that, referring to Figure 7 The lead cables of the silicon carbide driver module include: Three-phase cables and resolver cables; Three-phase cables and resolver cables are treated with a vulcanization process for waterproofing.

[0060] Three-phase cables need to withstand high voltage and high current when operating at high power. If they get damp, their insulation performance will deteriorate or even break down. Resolver cables are responsible for the signal transmission of motor position detection and closed-loop control. They have extremely high requirements for signal integrity. If water gets in, it may cause interference or signal distortion.

[0061] The waterproofing process using vulcanization creates a pressure-resistant and impermeable protective layer on the cable surface, ensuring long-term stable operation of the cable in deep-sea environments.

[0062] It should be noted that the mounting panel 10 is installed inside the motor driver housing 1 by a sealing strip, which is used for surface sealing and waterproofing.

[0063] The mounting panel 10 is installed inside the motor driver housing 1 via a sealing strip. The sealing strip is located at the contact edge between the mounting panel 10 and the driver housing to form a planar seal, thereby preventing liquid medium 6 from seeping out through the panel joint gaps. The sealing strip is made of pressure-resistant and corrosion-resistant elastic material, which undergoes elastic deformation under pressure during installation, thereby filling the tiny gaps and achieving a waterproof seal.

[0064] It is understood that the same or similar parts in the above embodiments can be referred to each other, and the contents not described in detail in some embodiments can be referred to the same or similar contents in other embodiments.

[0065] It should be noted that in the description of this application, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this application, unless otherwise stated, "a plurality of" means at least two.

[0066] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0067] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A high-power underwater liquid storage motor driver, characterized in that, include: Motor driver housing, first bolt structure, first sealing ring, liquid medium, plug, silicon carbide drive module, mounting panel, terminal block, insulating flange and through-chamber housing; The top end of the motor driver housing is fastened to the bottom end of the motor housing, and a cavity is formed between the motor driver housing and the motor housing after the fastening connection. The first bolt structure secures the fastening connection between the motor driver housing and the motor housing; The first sealing ring seals the snap-fit ​​connection between the motor driver housing and the motor housing; The motor driver housing has an injection port and an exhaust port on its outer side; The injection port and the exhaust port are connected to the cavity through a built-in pipe in the motor driver housing; The plug includes an injection plug and an vent plug, with the injection plug located on the injection port and the vent plug located on the vent port. The liquid medium is injected into the cavity through the injection port; the exhaust port is used to expel gas from the cavity. After the surface of the silicon carbide drive module is coated with a thermally conductive material, it is mounted on the mounting panel; the mounting panel is installed inside the motor driver housing. The terminals are respectively connected to the lead-out cables of the silicon carbide drive module and the lead-out cables of the motor; The terminal block is fixedly installed on the transom shell via an insulating flange; The transom shell is installed inside the cavity, and the transom shell is sealed by a multi-layer sealing structure.

2. The high-power underwater liquid storage motor driver according to claim 1, characterized in that, The top of the motor driver housing has a first annular edge; The bottom end of the motor housing has a second annular edge; The outer diameter of the first annular edge is the same as the inner diameter of the second annular edge; The top end of the motor driver housing and the bottom end of the motor housing are fastened together by the first annular edge and the second annular edge.

3. The high-power underwater liquid storage motor driver according to claim 1, characterized in that, Also includes: Two second sealing rings; The second sealing ring is disposed at the injection port and the vent port to seal the injection port and the vent port.

4. The high-power underwater liquid storage motor driver according to claim 1, characterized in that, Also includes: Multiple heat sinks; The heat sink is detachably mounted on the inner side and bottom side of the motor driver housing; The heat sink on the inner side of the motor driver housing is mounted close to the mounting panel.

5. The high-power underwater liquid storage motor driver according to claim 1, characterized in that, Also includes: Sacrificial anode, plug assembly, and grounding wire; The motor driver housing includes: a bottom cover; The bottom cover is foldably mounted on the bottom end of the motor driver housing; The sacrificial anode, plug assembly, and grounding wire are mounted on the bottom cover.

6. The high-power underwater liquid storage motor driver according to claim 1, characterized in that, Also includes: The third, fourth, and fifth sealing rings; The third sealing ring is disposed between the terminal and the insulating flange for sealing the terminal; The fourth sealing ring is disposed on the outside of the insulating flange and is used to seal the insulating flange; The fifth sealing ring is disposed on the outside of the transom shell and is used to seal the transom shell.

7. The high-power underwater liquid storage motor driver according to claim 1, characterized in that, Also includes: Second bolt structure; The motor driver housing also includes: a top cover; The second bolt structure is used to secure the through-cabin housing to the top cover of the electrical drive housing.

8. The high-power underwater liquid storage motor driver according to claim 1, characterized in that, The lead cables of the silicon carbide driver module include: Three-phase cables and resolver cables; The three-phase cables and the resolver cables are treated with a vulcanization process for waterproofing.

9. The high-power underwater liquid storage motor driver according to claim 1, characterized in that, The mounting panel is installed inside the motor driver housing via a sealing strip, which is used for planar sealing and waterproofing.

10. The high-power underwater liquid storage motor driver according to claim 1, characterized in that, The motor driver housing has a cylindrical structure.

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