A high-power underwater liquid storage motor driver

Abstract

The application relates to a high-power underwater liquid storage motor driver, which 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 terminal post, an insulating flange and a cabin penetrating shell. The top end of the motor driver shell is in butt joint with the bottom end of a motor shell, is fixed through the first bolt structure and is sealed through the first sealing ring, thereby forming an independent cavity, achieving compact installation and improving pressure resistance and waterproof performance. Liquid injection ports and exhaust ports are arranged outside the shell, the liquid injection ports are controlled through the plug, the liquid medium can lubricate the motor shaft after being injected into the cavity, can absorb residual heat and circulate heat, the exhaust ports can exhaust residual gas, and liquid uniform distribution is guaranteed. The silicon carbide power driving module is coated with a heat-conducting material and is mounted on the panel, the heat dissipation efficiency is significantly improved, and the volume is reduced. The terminal post is fixed on the cabin penetrating shell through the insulating flange, multiple layers of sealing are adopted to realize electrical and liquid isolation, and safety and sealing are ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of motor driver, and particularly relates to a high-power underwater liquid storage motor driver. BACKGROUND

[0002] With the deepening of ocean development activities, the performance requirements for underwater equipment are increasingly improved. As a key propulsion component of underwater robots, torpedoes and other equipment, underwater special propulsion motors are self-evident in importance. As a core device for controlling and driving the operation of underwater motors, the performance of the motor driver directly affects the overall performance and reliability of the underwater equipment.

[0003] The existing high-power underwater motor driver generally has key defects such as low heat dissipation efficiency and complex structure, and it is difficult to meet the requirements of high-power underwater applications such as deep sea, long period and high reliability operation. Especially in application scenarios that require compact installation space (such as integrated in the propeller pod and inside the underwater production equipment), the limitations of the prior art are more prominent. SUMMARY

[0004] In order to at least partially overcome the problem of low heat dissipation efficiency and complex structure of the high-power underwater motor driver in the related art, the present application provides a high-power underwater liquid storage motor driver.

[0005] The scheme of the present application is as follows:

[0006] A high-power underwater liquid storage motor driver comprises:

[0007] a motor driver shell, a first bolt structure, a first sealing ring, a liquid medium, a plug, a silicon carbide drive module, a mounting panel, a terminal post, an insulating flange and a through-hull shell;

[0008] The top end of the motor driver shell is connected to the bottom end of the motor shell in a snap-fit connection, and a cavity is formed between the motor driver shell and the motor shell after the snap-fit connection;

[0009] The first bolt structure fixes the snap-fit connection between the motor driver shell and the motor shell;

[0010] The first sealing ring seals the snap-fit connection between the motor driver shell and the motor shell;

[0011] The motor driver shell is provided with a liquid injection port and an exhaust port on the outside;

[0012] The liquid injection port and the exhaust port are connected to the cavity through the built-in pipeline of the motor driver shell;

[0013] The plug comprises a liquid injection plug and an exhaust plug, the liquid injection plug is arranged on the liquid injection port, and the exhaust plug is arranged on the exhaust port.

[0014] The liquid medium is injected into the cavity through the liquid injection port; and the exhaust port is used to exhaust gas in the cavity.

[0015] The silicon carbide drive module is installed on the mounting panel after the surface of the silicon carbide drive module is coated with a heat-conductive material; and the mounting panel is installed inside the motor driver housing.

[0016] The terminal posts are respectively connected to the lead cables of the silicon carbide drive module and the lead cables of the motor.

[0017] The terminal posts are fixedly installed on the trans-cabin housing through the insulating flanges.

[0018] The trans-cabin housing is installed in the cavity, and the trans-cabin housing is sealed by the multi-layer sealing structure.

[0019] Preferably, the top end of the motor driver housing has a first annular rim.

[0020] The bottom end of the motor housing has a second annular rim.

[0021] The outer diameter of the first annular rim is the same as the inner diameter of the second annular rim.

[0022] The top end of the motor driver housing and the bottom end of the motor housing are connected by the first annular rim and the second annular rim.

[0023] Preferably, the motor driver housing further comprises:

[0024] Two second sealing rings.

[0025] The second sealing rings are arranged at the liquid injection port and the exhaust port to seal the liquid injection port and the exhaust port.

[0026] Preferably, the motor driver housing further comprises:

[0027] A plurality of groups of heat dissipation fins.

[0028] The heat dissipation fins are detachably installed on the inner side edge and the bottom side edge of the motor driver housing.

[0029] The heat dissipation fins on the inner side edge of the motor driver housing are close to the mounting panel.

[0030] Preferably, the motor driver housing further comprises:

[0031] A sacrificial anode, a plug assembly, and a grounding wire.

[0032] The motor driver housing comprises a bottom cover.

[0033] The bottom cover is openably and closably installed at the bottom end of the motor driver housing.

[0034] The sacrificial anode, the plug assembly and the grounding wire are mounted on the bottom cover.

[0035] Preferably, further comprising:

[0036] The third sealing ring, the fourth sealing ring and the fifth sealing ring;

[0037] The third sealing ring is arranged between the terminal post and the insulating flange, and is used for sealing the terminal post;

[0038] The fourth sealing ring is arranged outside the insulating flange, and is used for sealing the insulating flange;

[0039] The fifth sealing ring is arranged outside the cabin-penetrating shell, and is used for sealing the cabin-penetrating shell.

[0040] Preferably, further comprising:

[0041] The second bolt structure;

[0042] The motor driver shell further comprises a top cover;

[0043] The second bolt structure is used for fixedly mounting the cabin-penetrating shell on the top cover of the electric appliance driver shell.

[0044] Preferably, the outgoing cable of the silicon carbide drive module comprises:

[0045] The three-phase cable and the rotary transformer cable;

[0046] The three-phase cable and the rotary transformer cable are waterproofed by a vulcanization process.

[0047] Preferably, the mounting panel is mounted inside the motor driver shell through a sealing rubber strip, and the sealing rubber strip is used for plane sealing and waterproofing.

[0048] Preferably, the motor driver shell is in a cylindrical structure.

[0049] The technical scheme provided in the application can have the following beneficial effects:

[0050] The top end of the motor driver shell is connected to the bottom end of the motor shell in a buckling manner, so as to realize axial butt joint of the motor driver and the motor, and to form an independent cavity through the first bolt structure and the first sealing ring. In this way, on the one hand, compact installation of the motor driver and the motor is ensured, and on the other hand, the overall pressure resistance and water resistance are improved by using the sealing structure, so as to adapt to the deep sea environment.

[0051] The shell is provided with a liquid injection port and an exhaust port on the outside, and the controllable opening and closing is realized through a plug. The liquid medium is injected into the cavity, which can form a liquid cooling environment, lubricate the motor shaft, and also absorb the excess heat generated by the motor for internal circulation to achieve the effect of cooling the motor. The exhaust port can exhaust the residual gas in the cavity to avoid air resistance, ensure uniform distribution of the liquid, and improve the heat dissipation efficiency.

[0052] The driving module adopts a silicon carbide power device, which is installed on the mounting panel after being coated with a heat-conducting material, significantly improving the module heat dissipation efficiency and solving the problem of heat dissipation difficulty of high-power drivers. At the same time, the silicon carbide driving module itself has the characteristics of high integration, which can significantly reduce the system volume and size.

[0053] The terminal post is used to connect the silicon carbide driving module and the outgoing cable of the motor, and is fixedly installed on the penetration shell through an insulating flange. The insulating flange and the penetration shell adopt a multi-layer sealing structure to realize the isolation of electrical connection and liquid cavity, ensure electrical safety, and avoid liquid leakage. The penetration shell design ensures that the cable can still maintain overall sealing when passing through the shell.

[0054] The driver shell and the motor shell are buckled to form an integrated cavity, reducing external pipelines and additional cooling devices, and the penetration shell and the multi-layer sealing ensure the safe outgoing of the cable without increasing the volume. The overall structure is simplified and the volume is reduced, which is suitable for the narrow space of the thruster pod or underwater equipment.

[0055] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. BRIEF DESCRIPTION OF DRAWINGS

[0056] The drawings incorporated into the specification and forming part of the specification, show embodiments consistent with the present application, and together with the specification, serve to explain the principles of the present application.

[0057] Figure 1 is a cross-sectional structure schematic diagram of a high-power underwater liquid storage motor driver provided by an embodiment of the present application;

[0058] Figure 2 is a structure schematic diagram of a silicon carbide driving module and a mounting panel provided by an embodiment of the present application;

[0059] Figure 3 is a plug structure schematic diagram provided by an embodiment of the present application;

[0060] Figure 4 is an unfolded structure schematic diagram of a penetration shell provided by an embodiment of the present application;

[0061] Figure 5is a structural schematic diagram of a heat sink provided by an embodiment of the present application;

[0062] Figure 6 is a structural schematic diagram of a bottom cover of a motor driver housing provided by an embodiment of the present application;

[0063] Figure 7 is a structural schematic diagram of an outgoing cable of a silicon carbide drive module provided by an embodiment of the present application.

[0064] Reference signs: motor driver housing 1, first bolt structure 2, motor housing 3, first sealing ring 4, cavity 5, liquid medium 6, plug 7, liquid 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 post 13, insulating flange 14, third sealing ring 15, fourth sealing ring 16, cabin-penetrating housing 17, fifth sealing ring 18, second bolt structure 19, top cover 20. DETAILED DESCRIPTION

[0065] The exemplary embodiments will be described in detail herein with reference to the accompanying drawings. In the following description, the same numbers refer to the same elements throughout the drawings. The following exemplary embodiments described in the following description do not represent all the implementations consistent with the present application.

[0066] Figure 1 is a structural schematic diagram of a cross section of a high-power underwater liquid storage motor driver provided by an embodiment of the present application, referring to Figure 1 A high-power underwater liquid storage motor driver comprises:

[0067] The motor driver housing 1, the first bolt structure 2, the first sealing ring 4, the liquid medium 6, the plug 7, the silicon carbide drive module 9, the mounting panel 10, the terminal post 13, the insulating flange 14, and the cabin-penetrating housing 17;

[0068] The top end of the motor driver housing 1 is connected to the bottom end of the motor housing 3 by a snap-fit connection. After the snap-fit connection, the cavity 5 is formed between the motor driver housing 1 and the motor housing 3.

[0069] The first bolt structure 2 fixes the snap-fit connection between the motor driver housing 1 and the motor housing 3.

[0070] The first sealing ring 4 seals the snap-fit connection between the motor driver housing 1 and the motor housing 3.

[0071] The motor driver housing 1 has a liquid injection port and an exhaust port on the outside.

[0072] The liquid injection port and the exhaust port are connected to the cavity 5 through the built-in pipeline of the motor driver shell 1.

[0073] The plug 7 includes a liquid injection plug 71 and an exhaust plug 72, the liquid injection plug 71 is arranged on the liquid injection port, and the exhaust plug 72 is arranged on the exhaust port.

[0074] The liquid medium 6 is injected into the cavity 5 through the liquid injection port; the exhaust port is used to exhaust the gas in the cavity 5.

[0075] The silicon carbide drive module is coated with a heat-conducting material on the surface and is installed on the mounting panel 10; the mounting panel 10 is installed inside the motor driver shell 1.

[0076] The terminal post 13 is connected to the lead cable of the silicon carbide drive module and the lead cable of the motor, respectively.

[0077] The terminal post 13 is fixedly installed on the trans-cabin shell 17 through the insulating flange 14.

[0078] The trans-cabin shell 17 is installed in the cavity 5, and the trans-cabin shell 17 is sealed through a multi-layer sealing structure.

[0079] In specific practice, the motor driver shell 1 is a cylindrical structure. The stress of the cylindrical driver is uniformly distributed on the curved surface under water, and there is no obvious stress concentration; under the same pressure resistance capacity, the material requirement is less; the curved surface is more stable when being pressed and is not easy to deform. The direct connection of the cylindrical motor driver and the motor improves the integration of the motor driver and the motor and saves space.

[0080] Since the motor driver needs to work in seawater 600 meters deep (maximum external pressure 6Mpa), preferably, the anti-rust aluminum with certain corrosion resistance is used as the main material of the motor driver shell 1, and the yield strength thereof is about 260MPa. It can withstand the underwater external pressure of 6Mpa. The surface is treated by anodic oxidation, and further surface protection is adopted for the main exposed surface of the product shell.

[0081] Preferably, the modified silane paint is used as the coating material of the product end cover and the exposed surface of the shell, the paint has strong adhesion, strong toughness, impact resistance, and super strong salt spray resistance, oil resistance, acid and alkali resistance, and seawater chemical corrosion resistance.

[0082] The liquid medium 6 can be but is not limited to electrically insulating oil (silicone oil), fluorinated liquid, etc. The silicone oil has excellent dielectric properties, high chemical stability, good high and low temperature resistance, and is not easy to volatilize. The fluorinated liquid has excellent electrical insulation, strong chemical inertness, low viscosity, good heat conductivity, large latent heat of vaporization, and is often used for cooling of high-reliability electronic equipment, which can avoid electrochemical corrosion.

[0083] In this embodiment, silicon carbide is used as the driving module. Silicon carbide (SiC) is a wide bandgap semiconductor material that has unique physical and chemical properties, and has significant advantages in harsh application scenarios such as high temperature, high pressure, and high frequency. Compared with ordinary Si devices, the switching frequency, power density, and energy utilization efficiency of the electronic system are improved, meeting the requirements of lightweight and miniaturization technology. The silicon carbide is mounted on the mounting panel 10, and the silicon carbide mounting surface is coated with a special superconducting thermal material before installation. The mounting panel 10 is connected to the cylindrical shell of the controller by screw fastening, and the shell bottom is provided with a cooling tooth at the corresponding position to increase the cooling surface and achieve better cooling effect. The mounting connection diagram of the silicon carbide driving module and the mounting panel 10 is shown in Figure 2 .

[0084] In specific practice, the silicon carbide driving module in this embodiment is a 1200 V CoolSiC™ MOSFET double tube module, with a size of 62 mm, a working voltage of 1200 V, and a 2mΩ half-bridge design. It is internally configured with a CoolSiC™ MOSFET chip. The working temperature is -40℃~150℃, VDSS =1200V; ID nom = 500A / IDRM = 1000A.

[0085] Referring to Figure 3 , the plug 7 includes a liquid injection plug 71 and an exhaust plug 72. The liquid injection plug 71 is arranged on the liquid injection port, and the exhaust plug 72 is arranged on the exhaust port. After the liquid injection plug 71 and the exhaust plug 72 are removed, the liquid injection port and the exhaust port are opened. The liquid injection port injects the liquid medium 6, and the exhaust port discharges the excess gas in the cavity 5 during the injection of the liquid medium 6.

[0086] Figure 4 is an expanded structure diagram of the cabin penetrating shell 17. The terminal post 13 is connected to the lead cable of the silicon carbide driving module and the lead cable of the motor, respectively. Then the terminal post 13 is fixedly installed on the cabin penetrating shell 17 through the insulating flange 14. Finally, the cabin penetrating shell 17 is installed in the cavity 5, and the cabin penetrating shell 17 is sealed by a multi-layer sealing structure.

[0087] Referring to Figure 4 , the high-power underwater liquid storage motor driver further comprises:

[0088] The second bolt structure 19;

[0089] The motor driver shell 1 further comprises: a top cover 20;

[0090] The second bolt structure 19 is used to fixedly install the cabin penetrating shell 17 on the top cover 20 of the electric appliance driver shell.

[0091] In the assembly process, the second bolt structure 19 acts through the pre-tightening force to make the through-hull casing 17 tightly fit with the driver casing, and at the same time, compresses the sealing ring therebetween to form a stable sealing effect.

[0092] The high-power underwater liquid storage motor driver in the embodiment is connected with the bottom end of the motor casing 3 through the top end of the motor driver casing 1 to realize axial butt joint of the motor driver and the motor, and is fixed through the first bolt structure 2 and sealed through the first sealing ring 4 to form an independent cavity 5. In this way, on the one hand, the compact installation of the motor driver and the motor is ensured, and on the other hand, the overall pressure resistance and water resistance are improved by using the sealing structure to adapt to the deep sea environment.

[0093] The casing is designed with a liquid injection port and an exhaust port, which are controllably opened and closed through the plug 7. The liquid medium 6 injected into the cavity 5 can form a liquid cooling environment, play a lubricating role on the motor shaft, and also absorb the excess heat generated by the motor to achieve the effect of heat dissipation of the motor. The exhaust port can exhaust the residual gas in the cavity 5 to avoid air resistance, ensure uniform distribution of the liquid, and improve the heat dissipation efficiency.

[0094] The driving module adopts a silicon carbide power device, which is installed on the mounting panel 10 after being coated with a heat-conducting material, thereby significantly improving the heat dissipation efficiency of the module and solving the problem of difficult heat dissipation of the high-power driver. At the same time, the silicon carbide driving module itself has the characteristics of high integration, which can significantly reduce the system volume and size.

[0095] The terminal post 13 is used to connect the lead-out cable of the silicon carbide driving module and the motor, and is fixedly installed on the through-hull casing 17 through the insulating flange 14. The insulating flange 14 and the through-hull casing 17 adopt a multi-layer sealing structure to realize the isolation of the electrical connection and the liquid cavity 5, ensure the electrical safety, and at the same time, avoid liquid leakage. The through-hull casing 17 is designed to ensure that the cable can still maintain the overall sealing property when passing through the casing.

[0096] The driver casing and the motor casing 3 are buckled to form an integrated cavity 5, reducing external pipelines and additional cooling devices. The through-hull casing 17 and the multi-layer sealing ensure the safe lead-out of the cable without increasing the volume. The overall structure is simplified and the volume is reduced, which is suitable for the narrow space of the propeller pod or underwater equipment.

[0097] Embodiment Two

[0098] It should be noted that the top end of the motor driver casing 1 has a first annular rim;

[0099] The bottom end of the motor casing 3 has a second annular rim;

[0100] The outer diameter of the first annular rim is the same as the inner diameter of the second annular rim;

[0101] The top end of the motor driver shell 1 is connected with the bottom end of the motor shell 3 through the first annular edge and the second annular edge.

[0102] As shown in Figure 1 , the top end of the motor driver shell 1 has a first annular edge, and the bottom end of the motor shell 3 has a second annular edge. The top end of the motor driver shell 1 is connected with the bottom end of the motor shell 3 through the first annular edge and the second annular edge. Through the above structural design, the motor driver shell 1 and the motor shell 3 can be stably connected when they are connected, thereby enhancing the mechanical strength and sealing performance of the connection part while forming the cavity 5.

[0103] The annular clamping structure realizes the positioning and fixing functions similar to the "clamping groove type" through the precise size matching of the first annular edge and the second annular edge during installation. While cooperating with the first bolt structure 2 and the first sealing ring 4, it can significantly reduce the offset error during installation, making the combination of the motor driver shell 1 and the motor shell 3 more tightly and firmly.

[0104] Embodiment three

[0105] It should be noted that the high-power underwater liquid storage motor driver further comprises:

[0106] Two second sealing rings 8;

[0107] The second sealing ring 8 is arranged at the liquid injection port and the exhaust port for sealing the liquid injection port and the exhaust port.

[0108] Referring to Figure 1 , the second sealing ring 8 is arranged at the liquid injection port and the exhaust port, respectively, for reliably sealing the liquid injection port and the exhaust port when they are closed. Specifically, the second sealing ring 8 is embedded in the inner wall groove of the liquid injection port and the exhaust port. When the plug 7 is tightened or installed in place, the sealing ring is elastically deformed under pressure, thereby filling the interface gap and achieving isolation between the liquid and the external environment.

[0109] The liquid injection port and the exhaust port are important channels for the liquid medium 6 to enter and exit the cavity 5. If the sealing is not strict, seawater may flow back or the liquid may leak, affecting the stability of the liquid medium 6 inside the driver. By arranging the second sealing ring 8 at the liquid injection port and the exhaust 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.

[0110] Embodiment four

[0111] It should be noted that the high-power underwater liquid storage motor driver further comprises:

[0112] A plurality of heat dissipation fins;

[0113] The heat sink is detachably mounted on the inner side and the bottom side of the motor driver housing 1.

[0114] The heat sink on the inner side of the motor driver housing 1 is mounted close to the mounting panel 10.

[0115] The specific structure of the heat sink is shown in Figure 5 , Figure 5 The heat sink on the inner side of the motor driver housing 1 is mounted close to the mounting panel 10 to directly absorb the heat transmitted by the silicon carbide drive module through the mounting panel 10, improving the timeliness and uniformity of heat dissipation.

[0116] When the silicon carbide drive module generates heat during operation, the heat is first conducted to the heat sink through the heat-conducting coating and the mounting panel 10, and then transmitted to the motor driver housing 1 through the heat sink, realizing rapid heat exchange.

[0117] The heat sink is detachably mounted by bolt connection, card slot cooperation or heat-conducting adhesive bonding, which not only ensures the close contact between the heat sink and the housing, but also facilitates later replacement or maintenance.

[0118] Example Five

[0119] It should be noted that, referring to Figure 6 , the high-power underwater liquid storage motor driver further comprises:

[0120] The sacrificial anode 11, the plug assembly and the grounding wire;

[0121] The motor driver housing 1 comprises a bottom cover 12.

[0122] The bottom cover 12 is detachably mounted on the bottom end of the motor driver housing 1.

[0123] The sacrificial anode 11, the plug assembly and the grounding wire are mounted on the bottom cover 12.

[0124] In order to avoid scratches, wear, pinholes or aging failure points in the coating during installation, transportation and use, the sacrificial anode 11 is designed to utilize the electrochemical activity difference of metals to connect the more negative magnesium alloy to the motor driver structure that needs to be protected. The sacrificial anode 11 provides "backup" protection in these damaged or weak local areas of the coating, forming a "coating + cathodic protection" double protection system, ensuring that even if the coating is locally failed, the metal substrate will not be quickly corroded. The system has high reliability and low maintenance requirements, and is especially suitable for underwater applications in harsh environments and difficult maintenance. After installation, there is basically no need for intervention until the anode is depleted.

[0125] The plug assembly is used to provide a reliable electrical interface for the driver, simplifying the installation and disassembly operation of the underwater equipment.

[0126] The grounding wire is used to form an effective grounding loop, avoiding electrical safety hazards caused by underwater high-voltage electrical interference or leakage.

[0127] Embodiment six

[0128] It should be noted that, with reference to Figure 4 The high-power underwater liquid storage motor driver further comprises:

[0129] The third sealing ring 15, the fourth sealing ring 16 and the fifth sealing ring 18;

[0130] The third sealing ring 15 is arranged between the terminal post 13 and the insulating flange 14, and is used to seal the terminal post 13;

[0131] The fourth sealing ring 16 is arranged outside the insulating flange 14, and is used to seal the insulating flange 14;

[0132] The fifth sealing ring 18 is arranged outside the trans-cabin shell 17, and is used to seal the trans-cabin shell 17.

[0133] As Figure 4 shown, the terminal post 13, the insulating flange 14 and the trans-cabin shell 17 are transition areas between the liquid cavity 5 and the external environment of the cable, and there is a high risk of leakage. By arranging the third, fourth and fifth sealing rings 18 at different positions, a multi-layer sealing structure from the inside to the outside is formed:

[0134] The third sealing ring 15 prevents liquid from leaking out of the gap between the terminal post 13 and the insulating flange 14;

[0135] The fourth sealing ring 16 further blocks the possible leakage path around the insulating flange 14;

[0136] The fifth sealing ring 18 forms the final barrier at the joint of the shell and the trans-cabin shell 17.

[0137] Through the superimposed use of the three sealing rings, a multi-level and multi-path barrier is formed, avoiding the overall leakage problem caused by the failure of a single sealing point. This hierarchical sealing design greatly improves the reliability of the overall sealing.

[0138] Preferably, the multi-layer sealing ring is made of a seawater corrosion-resistant and high-pressure-resistant elastic material. During assembly, a pre-pressure is generated through bolts or compression structures, causing elastic deformation of the sealing ring, thereby filling the joint gap and enhancing the sealing performance.

[0139] Embodiment seven

[0140] It should be noted that, with reference to Figure 7The outgoing cable of the silicon carbide drive module comprises:

[0141] The three-phase cable and the resolver cable;

[0142] The three-phase cable and the resolver cable are waterproofed by a vulcanization process.

[0143] The three-phase cable needs to withstand high voltage and large current when operating at high power, and if it gets wet, the insulation performance will decrease or even break down. The resolver cable bears the signal transmission task of motor position detection and closed-loop control, and the requirement for signal integrity is extremely high. If water enters, it may cause interference or signal distortion.

[0144] Through the waterproof treatment of the vulcanization process, a pressure-resistant and anti-seepage protective layer is formed on the surface of the cable, thereby ensuring the long-term stable operation of the cable in the deep sea environment.

[0145] It should be noted that the mounting panel 10 is installed inside the motor drive housing 1 by a sealing rubber strip, and the sealing rubber strip is used for plane sealing and waterproofing.

[0146] The mounting panel 10 is installed inside the motor drive housing 1 by a sealing rubber strip. The sealing rubber strip is arranged at the contact edge of the mounting panel 10 and the drive housing, and is used to form a plane seal to prevent liquid medium 6 from seeping out through the panel joint gap. The sealing rubber strip is made of a pressure-resistant and corrosion-resistant elastic material, and is elastically deformed under pressure during installation, thereby filling the small gap and achieving the effect of waterproof sealing.

[0147] It can be understood that the same or similar parts in the above embodiments can be mutually referred to, and the contents not described in detail in some embodiments can be referred to the same or similar contents in other embodiments.

[0148] It should be noted that in the description of the present application, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present application, unless otherwise specified, the meaning of "a plurality of" is at least two.

[0149] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0150] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary, and are not to be interpreted as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A high-power underwater liquid storage motor drive, characterized in that, The application relates to a motor driver shell, a first bolt structure, a first sealing ring, a liquid medium, a plug, a silicon carbide drive module, a mounting panel, a terminal post, an insulating flange and a cabin-penetrating shell. The top end of the motor driver shell is connected to the bottom end of the motor shell in a buckling mode, and a cavity is formed between the motor driver shell and the motor shell after buckling connection. The first bolt structure fixes the buckling connection between the motor driver shell and the motor shell. The first sealing ring seals the buckling connection between the motor driver shell and the motor shell. The motor driver shell is provided with a liquid injection port and an exhaust port on the outside. The liquid injection port and the exhaust port are connected to the cavity through the built-in pipeline of the motor driver shell. The plug comprises a liquid injection plug and an exhaust plug, the liquid injection plug is arranged on the liquid injection port, and the exhaust plug is arranged on the exhaust port. The liquid medium is injected into the cavity through the liquid injection port, and the exhaust port is used for exhausting gas in the cavity. The silicon carbide drive module is mounted on the mounting panel after being coated with a heat-conducting material, and the mounting panel is mounted in the motor driver shell. The terminal post is connected to the lead cable of the silicon carbide drive module and the lead cable of the motor respectively. The terminal post is fixedly mounted on the cabin-penetrating shell through the insulating flange. The cabin-penetrating shell is mounted in the cavity, and the cabin-penetrating shell is sealed through a multilayer sealing structure. The top end of the motor driver shell has a first annular edge.

2. The high-power underwater liquid storage motor drive of claim 1, wherein, The bottom end of the motor shell 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 shell is connected to the bottom end of the motor shell in a buckling mode through the first annular edge and the second annular edge. Further comprising:

3. The high-power underwater liquid storage motor drive of claim 1, wherein, Two second sealing rings. The second sealing rings are arranged at the liquid injection port and the exhaust port and are used for sealing the liquid injection port and the exhaust port. Further comprising:

4. The high-power underwater liquid storage motor drive of claim 1, wherein, A plurality of heat dissipation fins. The heat dissipation fins are detachably mounted on the inner side and the bottom side of the motor driver shell. The heat dissipation fin on the inner side of the motor driver shell is close to the mounting panel. Further comprising:

5. The high-power underwater liquid storage motor drive of claim 1, wherein, A sacrificial anode, a plug assembly and a grounding wire. The motor driver shell comprises a bottom cover. The bottom cover is openably mounted at the bottom end of the motor driver shell. The sacrificial anode, the plug assembly and the grounding wire are mounted on the bottom cover. Further comprising:

6. The high-power underwater liquid storage motor drive of claim 1, wherein, A third sealing ring, a fourth sealing ring and a fifth sealing ring. The third sealing ring is arranged between the terminal post and the insulating flange and is used for sealing the terminal post. The fourth sealing ring is arranged on the outside of the insulating flange and is used for sealing the insulating flange. The fifth sealing ring is arranged on the outside of the cabin-penetrating shell and is used for sealing the cabin-penetrating shell. Further comprising:

7. The high-power underwater liquid storage motor drive of claim 1, wherein, A second bolt structure. The motor driver shell further comprises a top cover. The second bolt structure is used for fixedly mounting the cabin-penetrating shell on the top cover of the motor driver shell. The lead cable of the silicon carbide drive module comprises:

8. The high-power underwater liquid storage motor drive of claim 1, wherein, Three-phase cable and rotary variable cable. The three-phase cable and the rotary variable cable are waterproofed by vulcanization process. ​ 9. The high-power underwater liquid storage motor drive of claim 1, wherein, The mounting panel is mounted inside the motor driver shell through a sealing rubber strip for plane sealing waterproof.

10. The high-power underwater liquid storage motor drive of claim 1, wherein, The motor driver shell is in a cylindrical structure.

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