A high-voltage induction motor for deep-sea applications with a rotor bar switching structure

Abstract

This invention relates to the field of electrical equipment technology, specifically to a high-voltage induction motor for deep-sea applications with a rotor bar switching structure. It includes a stator and a rotor, with the rotor containing the rotor bar switching structure. The rotor bar switching structure includes a switching component and bar assemblies disposed on the rotor core. Each bar assembly includes a first bar unit and a second bar unit that are insulated from each other and have different resistivities. The switching component includes a driving part and a conducting part. Under the drive of the driving part, the conducting part can selectively activate either the first bar unit or the second bar unit. By using two types of bars with different conductivity and mutual insulation, adaptive performance optimization based on the deep-sea pressure environment is achieved; simultaneously, the risk of electrochemical corrosion of the bar is reduced.

Description

Technical Field

[0001] This invention relates to the field of motor equipment technology, and specifically to a high-voltage induction motor for deep-sea applications with a rotor bar switching structure. Background Technology

[0002] Currently, with the continuous deepening of marine resource exploration and engineering development, the high-pressure environment of the deep sea places stringent demands on the power systems of operational equipment. Induction motors, due to their simple structure and high reliability, have become the preferred choice for core power components such as deep-sea robots and underwater propulsion systems. However, traditional induction motors typically use aluminum or copper conductors: copper's low resistance leads to excessive starting current and insufficient starting torque, failing to meet the heavy-load starting requirements of deep-sea robots and other equipment. Furthermore, copper's density increases rotor inertial mass, significantly increasing no-load energy consumption in shallow water. Aluminum, with its high resistivity and low density, while reducing starting current, is prone to insulation aging due to Joule heat accumulation in high-pressure, confined environments. Although copper plating on aluminum conductors balances low density and low resistivity, it is susceptible to electrochemical corrosion in seawater.

[0003] Therefore, there is an urgent need for a new type of high-voltage induction motor for deep-sea applications with a rotor bar switching structure. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a high-voltage induction motor for deep sea use with a rotor bar switching structure to solve the problem of poor environmental adaptability of the motor due to the limitation of the bar material in the prior art.

[0006] (II) Technical Solution

[0007] This invention discloses a high-voltage induction motor for deep-sea applications with a rotor bar switching structure, comprising a stator and a rotor. The stator includes a stator core and stator windings, and the rotor is disposed within the inner cavity of the stator core. The rotor includes a rotor core and a rotor shaft connected to the rotor core. It also includes a rotor bar switching structure, comprising a switching assembly and a bar assembly disposed within the rotor core.

[0008] The conductor assembly includes a first conductor unit and a second conductor unit that are insulated from each other, and the first conductor unit and the second conductor unit have different resistivities;

[0009] The first conductor unit includes multiple first conductors with insulating layers coated on their side surfaces, and the second conductor unit includes multiple second conductors with insulating layers coated on their side surfaces.

[0010] The first guide bar and the second guide bar are arranged at intervals and form the guide bar assembly around the central axis of the rotor core. Adjacent first guide bars and second guide bars are separated by the core body of the rotor core.

[0011] The switching component includes a driving part and a conducting part. Under the drive of the driving part, the conducting part can selectively conduct either the first guide bar unit or the second guide bar unit.

[0012] Preferably, both ends of the first guide bar and the second guide bar protrude beyond the two end faces of the rotor core; and the length of the first guide bar protruding beyond the two end faces of the rotor core is longer than that of the second guide bar, and conductive baffles perpendicular to the axial direction of the first guide bar are formed at both ends of the first guide bar.

[0013] The conductive portion includes a conductive slip ring, and at both ends of the first guide bar, at positions longer than the second guide bar, extension guide bars are formed for mounting the conductive slip ring; the conductive slip ring is slidably disposed on the extension guide bars, and the length of the extension guide bars is greater than the thickness of the conductive slip ring;

[0014] The conductive slip ring has multiple sliding grooves for the extension guide to pass through, and the sliding grooves are insulated from the extension guide.

[0015] The conductive slip ring slides along the extended guide bar to selectively connect either the first guide bar unit or the second guide bar unit.

[0016] Preferably, the conductive slip ring includes a conductive slider and multiple insulating sliders; the insulating slider and the conductive slider are a fixedly connected integral moving unit; the insulating slider has an insulating sliding groove inside, and the sliding groove covers the outer surface of the extended guide strip; the conductive slider is an annular conductive body, and the annular conductive body has multiple holes penetrating the thickness direction of the conductive slip ring, the holes being used to embed the insulating slider; the two end faces of the conductive slider in the thickness direction of the conductive slip ring are selectively connected to the conductive baffle and the end of the second guide strip, so as to selectively connect the first guide strip unit or the second guide strip unit.

[0017] Preferably, the conductive slip ring further includes an annular frame; the conductive slider and a plurality of insulating sliders are fixedly disposed within the annular frame; the annular frame is connected to the drive unit.

[0018] Preferably, the rotor core has multiple slots arranged radially around the central axis, and the slots form a ring structure around the central axis; the first guide bar and the second guide bar are arranged sequentially in the slots at intervals.

[0019] Preferably, the switching assembly further includes a pressure sensor, the driving part is a hydraulic rod, and the driving end of the hydraulic rod is connected to the conductive part; the pressure sensor is used to detect the working depth of the deep-sea high-pressure induction motor, and the hydraulic rod is used to drive the conductive part and change the conductive state between the conductive part and the first guide bar and the second guide bar.

[0020] Preferably, the resistivity of the first guide bar is greater than that of the second guide bar; when the deep-sea high-voltage induction motor is working at a depth greater than a preset depth, the driving unit drives the conductive part to connect to the second guide bar; when working at a depth less than a preset depth, the driving unit drives the conductive part to connect to the first guide bar.

[0021] Preferably, the first guide strip is made of aluminum and the second guide strip is made of copper.

[0022] (III) Beneficial Effects

[0023] This invention discloses a high-voltage induction motor for deep-sea applications with a rotor bar switching structure. By using two types of bars with different conductivity and mutual insulation, it achieves adaptive performance optimization based on the deep-sea pressure environment. The high conductivity of the copper bar improves the operating efficiency in the high-voltage zone, while the high resistance of the aluminum bar enhances the starting torque in the shallow sea zone. The axially staggered bar layout, combined with the mechanical switching of the conductive slip ring, reduces the risk of electrochemical corrosion of the bars under dual-circuit physical isolation. The extended bar integrated with the slide rail and the vertical baffle hard limit design allows for selective conduction of one bar, enhancing system reliability. Attached Figure Description

[0024] Figure 1 This is a three-dimensional schematic diagram of a high-voltage induction motor for deep-sea applications with a rotor bar switching structure according to the present invention.

[0025] Figure 2 This is a front view schematic diagram of a deep-sea high-voltage induction motor with a rotor bar switching structure according to the present invention;

[0026] Figure 3 This is a three-dimensional schematic diagram of the rotor of a deep-sea high-voltage induction motor with a rotor guide bar switching structure according to the present invention;

[0027] Figure 4 for Figure 2 A half-section diagram;

[0028] Figure 5 This is a three-dimensional schematic diagram of the guide bar assembly of a deep-sea high-voltage induction motor with a rotor guide bar switching structure according to the present invention;

[0029] Figure 6This is a three-dimensional schematic diagram of a conductive slip ring for a deep-sea high-voltage induction motor with a rotor bar switching structure according to the present invention.

[0030] Figure 7 for Figure 2 Schematic cross-section view along the middle AA;

[0031] Figure 8 for Figure 7 A magnified view of part B;

[0032] Figure 9 for Figure 8 A schematic diagram of the conductive slip ring activating the first conductive strip unit;

[0033] Figure 10 for Figure 7 A magnified view of part c.

[0034] [Explanation of Labels in the Attached Image]

[0035] 100: Stator; 200: Rotor; 300: Switching assembly;

[0036] 302: Guide bar assembly; 40: First guide bar unit; 50: Second guide bar unit;

[0037] 1: Stator core; 2: Rotor core;

[0038] 3: Conductive slip ring; 31: Conductive slider; 32: Insulating slider; 33: Annular frame;

[0039] 30: Sliding groove;

[0040] 4: First conductor strip; 41: Conductive baffle; 42: Extension conductor strip;

[0041] 5: Second guide bar; 9: Rotor shaft. Detailed Implementation

[0042] To better explain and facilitate understanding of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0043] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0044] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0045] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; "connection" can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0046] See Figures 1 to 10 The present invention discloses a high-voltage induction motor for deep-sea applications with a rotor bar switching structure, comprising a stator 100 and a rotor 200. The stator 100 includes a stator core 1 and stator windings (not shown in the figure), and the rotor 200 is disposed within the inner cavity of the stator core 1. The rotor 200 includes a rotor core 2 and a rotor shaft 9 connected to the rotor core 2. The invention also includes a rotor bar switching structure. The rotor bar switching structure includes a switching assembly 300 and a bar assembly 302 disposed within the rotor core 2.

[0047] The conductor assembly 302 includes a first conductor unit 40 and a second conductor unit 50 that are insulated from each other, and the first conductor unit 40 and the second conductor unit 50 have different resistivities.

[0048] The first guide bar unit 40 includes multiple first guide bars 4 with insulating layers coated on their side surfaces, and the second guide bar unit 50 includes multiple second guide bars 5 with insulating layers coated on their side surfaces;

[0049] The first guide bar 4 and the second guide bar 5 are arranged at intervals and form the guide bar assembly 302 around the central axis of the rotor core 2. Adjacent first guide bars 4 and second guide bars 5 are separated by the core of the rotor core 2.

[0050] The switching component 300 includes a driving part (not labeled) and a conducting part (not labeled). Under the drive of the driving part, the conducting part can selectively conduct either the first guide bar unit 40 or the second guide bar unit 50.

[0051] Most current deep-sea robots use three-phase asynchronous motors as their power source. Most three-phase asynchronous motors use only a single material of guide bars in the rotor core 2. Those skilled in the art should know the arrangement of the stator and rotor of a common three-phase asynchronous motor, so it will not be described in detail here. The rotor 200 of this invention is a squirrel-cage rotor and uses two sets of independent guide bar units to meet the power requirements of different working environments.

[0052] In shallow sea environments, the first guide bar unit 40 can be made of a material with a higher resistivity than the second guide bar unit 50. The motor switching component 300 is connected to the first guide bar unit 40, thereby enabling the motor to obtain a larger starting torque to meet the requirements of the deep-sea robot to repeatedly start and stop in shallow sea environments. In deep sea environments, the motor switching component 300 connects to the second guide bar unit 50, which has a lower resistivity, resulting in higher motor efficiency, less heat generation, and a longer motor life.

[0053] Preferably, the first conductor 4 is made of aluminum, and the second conductor 5 is made of copper. Aluminum and copper are commonly used conductive materials and are easy to process, making them particularly suitable for the conductor assembly 302 in this invention, which can effectively control costs. Those skilled in the art will not elaborate further here.

[0054] Specifically, the ends of the first guide bar 4 and the second guide bar 5 both protrude from the two end faces of the rotor core 2; and the length of the first guide bar 4 protruding from the two end faces of the rotor core is longer than that of the second guide bar 5. Conductive baffles 41 perpendicular to the axial direction of the first guide bar 4 are formed at both ends of the first guide bar 4.

[0055] The conductive part includes a conductive slip ring 3, and at both ends of the first guide bar 4, where it is longer than the second guide bar 5, extension guide bars 42 are formed for mounting the conductive slip ring 3; the conductive slip ring 3 is slidably disposed on the extension guide bars 42, and the length of the extension guide bars 42 is greater than the thickness of the conductive slip ring 3;

[0056] The conductive slip ring 3 has multiple sliding grooves 30 for the extension guide 42 to pass through, and the sliding grooves 30 are insulated from the extension guide 42;

[0057] The conductive slip ring 3 slides along the extended guide bar 42 to selectively connect either the first guide bar unit 40 or the second guide bar unit 50.

[0058] The length of the first guide bar 4 protruding from both ends of the rotor core 2 is longer than that of the second guide bar 5, forming a length difference. A vertical conductive baffle 41 is machined at the end of the first guide bar 4, serving as the switching contact of the first guide bar 4. The two ends of the second guide bar 5 are not coated with an insulating layer, serving as the switching contact of the second guide bar 5. By constructing a stepped contact through the length difference of the guide bars, the conductive slip ring 3 can only contact a single guide bar baffle when it is in different sliding positions. The conductive slip rings 3 set on both ends of the rotor core 2 simultaneously contact the same guide bar unit on both sides, forming a squirrel-cage rotor, realizing physically isolated circuit switching.

[0059] See details Figure 8 as well as Figure 9 The first guide bar 4 protrudes beyond the two end faces of the rotor core 2 and is longer than the second guide bar 5, forming a length difference. A vertical conductive baffle 41 is machined at the end of the first guide bar 4, serving as the switching contact of the first guide bar 4. The two end faces of the second guide bar are not coated with an insulating layer, serving as the switching contact of the second guide bar 5. By constructing a stepped contact through the length difference of the guide bars, the conductive slip ring 3 can only contact a single guide bar baffle when in different sliding positions. The conductive slip rings 3 set on the two end faces of the rotor core 2 simultaneously contact the same guide bar unit on both sides, forming a squirrel-cage rotor, realizing physically isolated circuit switching.

[0060] Preferably, the conductive slip ring 3 is fitted onto the extension guide 42; the conductive slip ring 3 has a sliding groove 30, which covers the extension guide 42 of the first guide 4, and the outer surface of the extension guide 42 is coated with an insulating layer. The presence of the insulating layer prevents the conductive slip ring 3 from conducting two guide units at the same time.

[0061] Specifically, the outer surfaces of the first guide bar 4 and the second guide bar 5 are provided with an insulating layer. When the first guide bar unit 40 is connected, the end face of the conductive slip ring 3 abuts against the conductive baffle 41 without an insulating layer, forming a squirrel-cage rotor 200. When the second guide bar unit 50 needs to be connected, the other end face of the conductive slip ring 3 abuts against the end face of the second guide bar, forming a squirrel-cage rotor 200.

[0062] More specifically, the conductive slip ring 3 includes a conductive slider 31 and multiple insulating sliders 32; the insulating sliders 32 and the conductive sliders 31 are integral moving units fixedly connected together; the insulating sliders 32 are provided with insulating sliding grooves 30, which cover the outer surface of the extended guide strip 42; the conductive sliders 31 are annular conductive bodies, and multiple holes penetrating the thickness direction of the conductive slip ring 3 are opened on the annular conductive bodies, the holes being used to embed the insulating sliders 32; the two end faces of the conductive sliders 31 in the thickness direction of the conductive slip ring 3 are selectively connected to the conductive baffle 41 and the end of the second guide strip 5, so as to selectively connect the first guide strip unit 40 or the second guide strip unit 50.

[0063] When the insulation layer wears down, the insulating slider 32 covers the extension guide bar 42, so the conductive slip ring 3 will not fail due to the simultaneous conduction of two sets of guide bar units. The setting of the insulating slider 32 improves the robustness of the switching component 300 and reduces the possibility of the switching component 300 failing.

[0064] Furthermore, the conductive slip ring 3 also includes an annular frame 33, a conductive slider 31, and a plurality of insulating sliders 32 fixedly disposed within the annular frame 33; the annular frame 33 is connected to the driving unit; the insulating sliders 32 and the conductive sliders 31 are integral motion units fixedly connected together through the annular frame 33.

[0065] The conductive slider 31 and the insulating slider 32 are fixedly connected as a whole by the annular frame 33. The external drive unit connected to the annular frame 33 will drive the entire conductive slip ring 3 to move to conduct different conductive strip units.

[0066] The thickness of the annular frame 33 is less than the length of the extended guide strip 42, and the ring width of the annular frame 33 is greater than the size of the conductive baffle 41.

[0067] Preferably, the rotor core 2 has multiple slots (not labeled) arranged radially around the central axis, and the slots form a ring structure around the central axis; the first guide bar 4 and the second guide bar 5 are arranged sequentially in the slots at intervals.

[0068] The annular radial slots are evenly distributed along the radial direction, conforming to the traditional 200-piece lamination process standard for squirrel cage rotors. The first guide bar 4 and the second guide bar 5 are arranged in an alternating manner, without changing the basic structure of the iron core, which can reduce manufacturing costs. At the same time, adjacent guide bars are directly separated by the rotor iron core 2 body, rather than using an insulating coating, forming a physical barrier. Combined with the insulating layer on the side wall of the guide bars, it blocks the galvanic contact in the seawater electrolyte environment, reducing the risk of electrochemical corrosion of the guide bars from the source.

[0069] Preferably, the switching component 300 further includes a pressure sensor (not shown in the figure), the driving part is a hydraulic rod (not shown in the figure), and the driving end of the hydraulic rod is connected to the conductive part; the pressure sensor is used to detect the working depth of the deep-sea high-pressure induction motor, and the hydraulic rod is used to drive the conductive part and change the conductive state between the conductive part and the first guide bar 4 and the second guide bar 5.

[0070] The pressure sensor detects the water pressure in the deep-sea environment where the motor is located in real time and converts it into a working depth signal. When the working depth is less than the preset threshold, the shallow sea mode is activated, that is, the first guide bar unit 40 is turned on. When the depth is greater than the preset threshold, the deep sea mode is switched, that is, the second guide bar unit 50 is turned on. The hydraulic rod drives the conductive slip ring 3 to slide along the axial direction of the extended guide bar 42 according to the control command, so as to completely avoid copper-aluminum electrochemical corrosion.

[0071] Preferably, the resistivity of the first guide bar 4 is greater than the resistivity of the second guide bar 5; when the deep-sea high-voltage induction motor is working at a depth greater than a preset depth, the driving unit drives the conductive part to connect to the second guide bar 5; when it is working at a depth less than a preset depth, the driving unit drives the conductive part to connect to the first guide bar 4.

[0072] It should be understood that the above description of specific embodiments of the present invention is only for illustrating the technical approach and features of the present invention, and is intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. However, the present invention is not limited to the specific embodiments described above. All changes or modifications made within the scope of the claims of the present invention should be covered within the protection scope of the present invention.

Claims

1. A high-voltage induction motor for deep-sea applications with a rotor bar switching structure, comprising a stator and a rotor, wherein the stator includes a stator core and stator windings, and the rotor is disposed within the inner cavity of the stator core; the rotor includes a rotor core and a rotor shaft connected to the rotor core; characterized in that, It also includes a rotor guide bar switching structure; the rotor guide bar switching structure includes: a switching component and a guide bar assembly disposed within the rotor core; wherein... The conductor assembly includes a first conductor unit and a second conductor unit that are insulated from each other, and the first conductor unit and the second conductor unit have different resistivities; The first conductor unit includes multiple first conductors with insulating layers coated on their side surfaces, and the second conductor unit includes multiple second conductors with insulating layers coated on their side surfaces. The first guide bar and the second guide bar are arranged at intervals and form the guide bar assembly around the central axis of the rotor core. Adjacent first guide bars and second guide bars are separated by the core body of the rotor core. The switching component includes a driving part and a conducting part. Under the drive of the driving part, the conducting part can selectively conduct either the first guide bar unit or the second guide bar unit. Both ends of the first guide bar and the second guide bar protrude from the two end faces of the rotor core; and the length of the first guide bar protruding from the two end faces of the rotor core is longer than that of the second guide bar. Both ends of the first guide bar have conductive baffles perpendicular to the axial direction of the first guide bar. The conductive part includes a conductive slip ring, and at both ends of the first guide bar, at a position longer than the second guide bar, an extension guide bar is formed for mounting the conductive slip ring; The conductive slip ring is slidably disposed on the extended guide strip, and the length of the extended guide strip is greater than the thickness of the conductive slip ring; The conductive slip ring has multiple sliding grooves through which the extended conductor passes, and the sliding grooves are insulated from the extended conductor. The conductive slip ring slides along the extended conductor to selectively connect either the first conductor unit or the second conductor unit.

2. The deep-sea high-voltage induction motor with rotor bar switching structure as described in claim 1, characterized in that, The conductive slip ring includes a conductive slider and multiple insulating sliders; the insulating slider and the conductive slider are a fixedly connected integral moving unit; the insulating slider has an insulating sliding groove inside, and the sliding groove covers the outer surface of the extended guide strip; the conductive slider is an annular conductive body, and the annular conductive body has multiple holes penetrating the thickness direction of the conductive slip ring, the holes being used to embed the insulating slider; the two end faces of the conductive slider in the thickness direction of the conductive slip ring are selectively connected to the conductive baffle and the end of the second guide strip, so as to selectively connect the first guide strip unit or the second guide strip unit.

3. The deep-sea high-voltage induction motor with rotor bar switching structure as described in claim 2, characterized in that, The conductive slip ring further includes an annular frame; the conductive slider and a plurality of insulating sliders are fixedly disposed within the annular frame; the annular frame is connected to the drive unit.

4. The deep-sea high-voltage induction motor with rotor bar switching structure as described in claim 1, characterized in that, The rotor core has multiple slots arranged radially around the central axis, and the slots form a ring structure around the central axis; the first guide bar and the second guide bar are arranged sequentially in the slots at intervals.

5. The deep-sea high-voltage induction motor with rotor bar switching structure as described in claim 1, characterized in that, The switching assembly further includes a pressure sensor, the driving unit is a hydraulic rod, and the driving end of the hydraulic rod is connected to the conductive part; the pressure sensor is used to detect the working depth of the deep-sea high-voltage induction motor, and the hydraulic rod is used to drive the conductive part and change the conduction state between the conductive part and the first guide bar and the second guide bar.

6. The deep-sea high-voltage induction motor with a rotor bar switching structure as described in any one of claims 1-5, characterized in that, The resistivity of the first guide bar is greater than that of the second guide bar; when the deep-sea high-voltage induction motor is working at a depth greater than a preset depth, the driving unit drives the conductive part to connect to the second guide bar; when it is working at a depth less than a preset depth, the driving unit drives the conductive part to connect to the first guide bar.

7. The deep-sea high-voltage induction motor with rotor bar switching structure as described in claim 6, characterized in that, The first guide bar is made of aluminum, and the second guide bar is made of copper.

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