Marine permanent magnet synchronous motor controller

Abstract

The invention relates to the technical field of synchronous motors, and discloses a marine permanent magnet synchronous motor controller which comprises a first connecting ring, the outer wall of the first connecting ring is fixedly connected with a fixing plate, the inner wall of the first connecting ring is fixedly connected with a second connecting ring, and the inner wall of the second connecting ring is fixedly connected with an elastic plate. The heat dissipation device further comprises a center mechanism, the center mechanism comprises a connecting column rotationally connected to the inner wall of the connecting sleeve through a bearing, and by arranging the center mechanism, after heat generated by operation of equipment is guided to the heat dissipation channel through the heat conduction plate, the controller is subjected to heat dissipation in cooperation with airflow, so that the heat dissipation efficiency of the controller is improved, and the service life of the controller is prolonged. When the equipment cools the controller, invasion of external humid air can be effectively resisted, the problem of mutual holding of heat dissipation and moisture-proof functions is avoided, the contradiction between the heat dissipation and moisture-proof functions is broken, the operation stability of the equipment is improved, and it is ensured that the equipment can continuously work in a humid environment.

Description

Technical Field

[0001] The invention relates to the technical field of synchronous motors, and in particular to a marine permanent magnet synchronous motor controller. Background Art

[0002] A motor controller is an integrated circuit that actively controls a motor to operate in a set direction, speed, angle, and response time. A motor controller can be operated manually, remotely, or automatically. It can include only the functions of starting and stopping the motor, or it can include other more complex functions.

[0003] The patent application with application number CN202121724325.6 discloses a marine permanent magnet synchronous motor controller, which relates to the field of motor controllers; it includes a controller body, a moisture-proof board and a control system, wherein the control system includes: a detection unit connected to a power supply, for detecting the ambient humidity and outputting a detection signal; a control unit connected to the output end of the detection unit to obtain a detection signal, compare the detection signal with a preset signal, and output a control signal when the humidity value corresponding to the detection signal is higher than the humidity value corresponding to the preset signal; an execution unit connected to the output end of the control unit to obtain a control signal, and respond to the control signal to make the moisture-proof board close the heat dissipation hole. The present application can reduce the possibility of environmental moisture entering the interior of the controller body through the heat dissipation hole, thereby achieving the effect of reducing the possibility of the controller body being damaged due to moisture.

[0004] When the existing equipment is in use, it is affected by the high humidity characteristics of the ship's operating environment, and the equipment needs to take moisture-proof measures to ensure the stable operation of the controller. When encountering special environments, the traditional solution is to block the invasion of humid air from the outside by blocking the heat dissipation holes. However, this blocks the heat dissipation channel of the equipment, and the heat inside the controller cannot be discharged in time, which directly leads to a decrease in the heat dissipation capacity of the equipment. If the heat dissipation holes are opened to achieve efficient heat dissipation, it is difficult to avoid moisture infiltration. The mutual restriction of the "moisture-proof" and "heat dissipation" functions makes the existing equipment unable to be used stably in a high humidity environment. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a marine permanent magnet synchronous motor controller to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a marine permanent magnet synchronous motor controller, comprising a connecting ring 1, the outer wall of the connecting ring 1 is fixedly connected to a fixing plate, the inner wall of the connecting ring 1 is fixedly connected to a connecting ring 2, the inner wall of the connecting ring 2 is fixedly connected to an elastic plate, the end of the elastic plate away from the connecting ring 2 is fixedly connected to a connecting sleeve, the inner wall of the connecting ring 1 is fixedly connected to a connecting ring 3, and further comprising:

[0007] A central mechanism, the central mechanism includes a connecting column rotatably connected to the inner wall of the connecting sleeve through a bearing, a connecting frame is arranged inside the connecting ring 1, the inner wall of the connecting frame is fixedly connected to the connecting column, the inner wall of the connecting frame is fixedly connected to a fixing ring, the front end of the connecting frame is fixedly connected to a controller, the rear side of the controller is fixedly connected to a heat conducting plate 1, the outer wall of the heat conducting plate 1 is fixedly connected to the fixing ring, the elastic plate dampens the movement of the moving part of the central mechanism in the connecting ring 1, and by setting the central mechanism, after the heat conducting plate guides the heat generated by the operation of the equipment to the heat dissipation channel, the controller is dissipated by the airflow, and while the equipment cools the controller, it can also effectively resist the invasion of humid air from the outside, avoiding the problem of mutual constraints between the heat dissipation and moisture-proof functions, breaking the contradiction between the two, improving the stability of the equipment operation, and ensuring that the equipment can continue to work in a humid environment.

[0008] According to the above technical solution, the front end of the connecting frame is fixedly connected with a magnetic ring 1, the inner wall of the connecting frame is movably connected with a magnetic ring 2, and the end of the magnetic ring 2 away from the magnetic ring 1 is fixedly connected with a cover plate. The magnetic ring 1 and the magnetic ring 2 attract each other, thereby facilitating the removal of the cover plate.

[0009] According to the above technical solution, the side of the fixing ring away from the connecting frame is fixedly connected with the heat conducting plate 2, the outer wall of the heat conducting plate 2 is movably connected with a limiting ring, the side away from the limiting ring is movably connected with the connecting frame, and the moving range of the movable part of the central mechanism is controlled by the limiting ring. By setting the central mechanism, thermal conductive liquid crystal is smeared between the heat conducting plate 2 and the heat conducting plate 3, and the mutually wrapped structure of the two effectively avoids the leakage of the thermal conductive liquid crystal. This design can not only ensure that the heat conducting plate 2 and the heat conducting plate 3 maintain high thermal conductivity, quickly transfer heat, and achieve good heat dissipation effect, but also avoid direct contact between the heat conducting plate 2 and the external gas, reduce the influence of external humid gas on it, further ensure the moisture-proof performance of the equipment, and ensure the stable operation of the equipment in a humid environment.

[0010] According to the above technical solution, the outer wall of the limiting ring is fixedly connected to a connecting ring four, the inner wall of the connecting ring four is fixedly connected to an elastic component, the connecting ring four is fixedly connected to a circular plate one on the side away from the limiting ring, the circular plate one is fixedly connected to a heat conducting plate three on the end close to the limiting ring, the outer wall of the heat conducting plate three is movably connected to the heat conducting plate two, the elastic component further reduces shock on the movable part of the central mechanism, and by arranging the elastic component and the elastic plate, the controller part in the central mechanism has the characteristic of being movable. Since the ship will continuously vibrate when sailing, this design enables the controller to have good shockproof ability in this environment. At the same time, in the process of shockproofing, the reverse force generated by the elastic component and the elastic plate can cause the water droplets condensed by humid gas in the heat dissipation channel to fall, effectively avoiding the water droplets from adhering to the inner wall of the heat dissipation channel for a long time, preventing the water droplets from penetrating into the inside of the equipment, avoiding the moisture-proof performance of the equipment from being affected, and ensuring the stability of the equipment operation.

[0011] According to the above technical solution, the outer wall of the circular plate one is fixedly connected with a connecting ring five, the side of the circular plate one away from the connecting frame is fixedly connected with an arc plate, the side of the circular plate one away from the connecting frame is fixedly connected with a lifting plate, the outer wall of the lifting plate is fixedly connected to the arc plate, and the side of the lifting plate away from the circular plate one is fixedly connected with a raised plate, and the arc plate plays a role in controlling the direction of airflow entry. By setting the arc plate, when the device dissipates heat to the controller through the rotation of the turbofan, the arc plate can guide the gas entering the device to form a rotating state. In the process of the device dissipating the gas, the high-speed rotating airflow enhances the heat dissipation capacity of the device, so that the heat generated by the controller can be quickly dissipated. At the same time, the high-speed rotating airflow causes the condensed water to be peeled off from the raised plate under the dual effects of surface tension and aerodynamic force, thereby solving the hidden danger of water accumulation and leakage in the heat dissipation channel, thereby ensuring that the moisture-proof performance of the equipment is not damaged, and ensuring the stability of the equipment operation.

[0012] According to the above technical solution, the side of the arc plate away from the circular plate one is fixedly connected to the circular plate two, a circular hole is opened in the center of the circular plate two, the outer wall of the circular plate two is fixedly connected to the annular plate one, the outer wall of the annular plate one is fixedly connected to the connecting ring two, and the circular hole serves to allow gas to flow out of the equipment.

[0013] According to the above technical solution, the side of the annular plate 1 close to the connecting frame is rotatably connected to the internal gear through a bearing, the side of the internal gear away from the annular plate 1 is fixedly connected to the annular plate 2, the side of the annular plate 2 away from the internal gear is fixedly connected to the turbofan, the end of the turbofan away from the annular plate 2 is rotatably connected to the connecting ring 4 through a bearing, and the end of the turbofan away from the connecting ring 4 is rotatably connected to the circular plate 2 through a bearing. The rotation of the turbofan serves to suck external gas into the interior of the equipment.

[0014] According to the above technical solution, the inner wall of the annular plate 1 is fixedly connected with a motor, the output end of the motor is fixedly connected with a gear 1, the gear 1 is meshed with the internal gear, and the starting of the motor drives the gear 1 to rotate, providing power for the rotation of the turbofan.

[0015] Compared with the prior art, the present invention provides a marine permanent magnet synchronous motor controller, which has the following beneficial effects:

[0016] 1. The present invention sets a central mechanism. After the heat conduction plate guides the heat generated by the operation of the equipment to the heat dissipation channel, the controller is cooled by the airflow. While the device cools down the controller, it can also effectively resist the invasion of external humid air, avoiding the problem of mutual constraints between the heat dissipation and moisture-proof functions, breaking the contradiction between the two, improving the stability of the equipment operation, and ensuring that the equipment can continue to work in a humid environment.

[0017] 2. The present invention provides elastic components and elastic plates so that the controller part in the central mechanism has the characteristic of being movable. Since the ship will continuously generate vibrations when sailing, this design enables the controller to have good shockproof capabilities in this environment. At the same time, during the shockproof process, the reverse force generated by the elastic components and the elastic plates can cause the water droplets condensed by humid gas in the heat dissipation channel to fall, effectively avoiding the water droplets from adhering to the inner wall of the heat dissipation channel for a long time, preventing the water droplets from penetrating into the interior of the device, avoiding the moisture-proof performance of the device from being affected, and ensuring the stability of the equipment operation.

[0018] 3. The present invention sets an arc plate. When the device dissipates heat from the controller through the rotation of the turbofan, the arc plate can guide the gas entering the device to form a rotating state. In the process of the device dissipating the gas, the high-speed rotating airflow enhances the heat dissipation capacity of the device, so that the heat generated by the controller can be quickly dissipated. At the same time, the high-speed rotating airflow causes the condensed water to be peeled off from the raised plate under the dual effects of surface tension and aerodynamic force, thereby solving the hidden danger of water accumulation and leakage in the heat dissipation channel, thereby ensuring that the moisture-proof performance of the equipment is not damaged and ensuring the stability of the equipment operation.

[0019] 4. The present invention sets a central mechanism, and applies thermal conductive liquid crystal between the second heat conducting plate and the third heat conducting plate. The mutually wrapped structure of the two effectively avoids the leakage of the thermal conductive liquid crystal. This design can not only ensure that the thermal conductive plate 2 and the third heat conducting plate maintain high thermal conductivity, quickly transfer heat, and achieve good heat dissipation effect, but also avoid direct contact between the second heat conducting plate and the external air, reduce the influence of external humid gas on it, further ensure the moisture-proof performance of the equipment, and ensure the stable operation of the equipment in a humid environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0021] Figure 1 The overall structure of the present invention is shown in FIG. Figure 1 ;

[0022] Figure 2 The overall structure of the present invention is shown in FIG. Figure 2 ;

[0023] Figure 3 It is a cross-sectional view of the overall structure of the present invention;

[0024] Figure 4 It is a partial structural schematic diagram of the present invention;

[0025] Figure 5 For the present invention Figure 3 A magnified view of middle;

[0026] Figure 6 This is a cross-sectional view of the central mechanism of the present invention. Figure 1 ;

[0027] Figure 7 This is a cross-sectional view of the central mechanism of the present invention. Figure 2 ;

[0028] Figure 8 This is a cross-sectional view of the central mechanism of the present invention. Figure 3 ;

[0029] Fig. 9 The central mechanism of the present invention is shown in FIG. Figure 1 ;

[0030] Fig.10 The central mechanism of the present invention is shown in FIG. Figure 2 ;

[0031] Fig.11 This is a cross-sectional view of the central mechanism of the present invention. Figure 4 .

[0032] In the figure: 1, connecting ring 1; 101, fixing plate; 102, connecting ring 2; 103, elastic plate; 104, connecting sleeve; 105, connecting ring 3; 106, controller; 107, heat transfer plate 1; 108, magnetic ring 1; 109, cover plate; 2, central mechanism; 201, connecting column; 202, connecting frame; 203, magnetic ring 2; 204, fixing ring; 205, heat transfer plate 2; 206, limiting ring; 2 07, connecting ring four; 208, circular plate one; 209, heat conduction plate three; 2010, elastic component; 2011, connecting ring five; 2012, lifting plate; 2013, arc plate; 2014, raised plate; 2015, circular plate two; 2016, annular plate one; 2017, round hole; 2018, motor; 2019, gear one; 2020, turbofan; 2021, annular plate two; 2022, internal gear. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0034] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Example 1: See Figure 1-Figure 6 The present invention provides a technical solution: a marine permanent magnet synchronous motor controller, comprising a connecting ring 1, the outer wall of the connecting ring 1 is fixedly connected with a fixing plate 101, the inner wall of the connecting ring 1 is fixedly connected with a connecting ring 2 102, the inner wall of the connecting ring 2 102 is fixedly connected with an elastic plate 103, the end of the elastic plate 103 away from the connecting ring 2 102 is fixedly connected with a connecting sleeve 104, the inner wall of the connecting ring 1 is fixedly connected with a connecting ring 3 105, and further comprising:

[0037] The central mechanism 2 includes a connecting column 201 rotatably connected to the inner wall of the connecting sleeve 104 through a bearing, a connecting frame 202 is arranged inside the connecting ring 1, the inner wall of the connecting frame 202 is fixedly connected to the connecting column 201, the inner wall of the connecting frame 202 is fixedly connected to the fixing ring 204, the front end of the connecting frame 202 is fixedly connected to the controller 106, the rear side of the controller 106 is fixedly connected to the heat conducting plate 107, the outer wall of the heat conducting plate 107 is fixedly connected to the fixing ring 204, the elastic plate 103 is used to dampen the movement of the moving part of the central mechanism 2 in the connecting ring 1, the front end of the connecting frame 202 is fixedly connected to the magnetic attraction ring 108, and the inner wall of the connecting frame 202 is movably connected to the magnetic attraction ring 203 The end of the magnetic ring 203 away from the magnetic ring 108 is fixedly connected with the cover 109, and the magnetic ring 108 and the magnetic ring 203 attract each other. When the controller 106 needs to be operated, the cover 109 can be directly removed. After the operation is completed, the cover 109 is covered on the surface of the controller 106. The magnetic ring 108 and the magnetic ring 203 can automatically fix the cover 109. The side of the fixing ring 204 away from the connecting frame 202 is fixedly connected with the heat conducting plate 205, and the outer wall of the heat conducting plate 205 is movably connected with the limiting ring 206, and the side away from the limiting ring 206 is movably connected to the connecting frame 202, and the moving range of the movable part of the central mechanism 2 is controlled by the limiting ring 206.

[0038] Example 2: Please refer to Figure 7-Figure 11On the basis of the first embodiment, the present invention provides a technical solution: the outer wall of the limiting ring 206 is fixedly connected with a connecting ring 4 207, the inner wall of the connecting ring 4 207 is fixedly connected with an elastic component 2010, the side of the connecting ring 4 207 away from the limiting ring 206 is fixedly connected with a circular plate 1 208, the end of the circular plate 1 208 close to the limiting ring 206 is fixedly connected with a heat conducting plate 3 209, the outer wall of the heat conducting plate 3 209 is movably connected with the heat conducting plate 2 205, the elastic component 2010 further reduces the shock of the movable part of the central mechanism 2, the outer wall of the circular plate 1 208 is fixedly connected with a connecting ring 5 2011, the side of the circular plate 1 208 away from the connecting frame 202 is fixedly connected with The arc plate 2013, the side of the circular plate 1 208 away from the connection frame 202 is fixedly connected with the lifting plate 2012, the outer wall of the lifting plate 2012 is fixedly connected to the arc plate 2013, the side of the lifting plate 2012 away from the circular plate 1 208 is fixedly connected with the raised plate 2014, the arc plate 2013 plays a role in controlling the direction of airflow entry, the side of the arc plate 2013 away from the circular plate 1 208 is fixedly connected with the circular plate 2 2015, the center of the circular plate 2 2015 is provided with a circular hole 2017, the outer wall of the circular plate 2 2015 is fixedly connected with the annular plate 1 2016, the outer wall of the annular plate 1 2016 is fixedly connected to the connecting ring 2 102, the circular hole 2017 plays a role in controlling the direction of airflow entry In order to flow out of the device, the side of the annular plate 2016 close to the connecting frame 202 is rotatably connected to the internal gear 2022 through a bearing, and the side of the internal gear 2022 away from the annular plate 2016 is fixedly connected to the annular plate 2021, and the side of the annular plate 2021 away from the internal gear 2022 is fixedly connected to the turbofan 2020, and the end of the turbofan 2020 away from the annular plate 2021 is rotatably connected to the connecting ring 4 207 through a bearing, and the end of the turbofan 2020 away from the connecting ring 4 207 is rotatably connected to the circular plate 2 2015 through a bearing. The rotation of the turbofan 2020 plays a role in sucking external gas into the interior of the device, and the inner wall of the annular plate 2016 is fixedly connected to the turbofan 2020. A motor 2018 is fixedly connected, and a gear 1 2019 is fixedly connected to the output end of the motor 2018. The gear 1 2019 meshes with the internal gear 2022. As the motor 2018 works, the gear 1 2019 is driven to rotate. The rotating gear 1 2019 drives the internal gear 2022 to rotate. The rotating internal gear 2022 drives the turbofan 2020 to rotate through the annular plate 2021. The rotating turbofan 2020 draws external gas into the interior of the device. The gas entering the interior of the device passes through the arc plate 2013. The gas is guided by the arc plate 2013 to enter the raised plate 2014 in a rotating manner, so as to dissipate the temperature transmitted from the heat conducting plate 3 209.

[0039] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A marine permanent magnet synchronous motor controller, comprising a connecting ring 1 (1), the outer wall of the connecting ring 1 (1) being fixedly connected to a fixing plate (101), the inner wall of the connecting ring 1 (1) being fixedly connected to a connecting ring 2 (102), the inner wall of the connecting ring 2 (102) being fixedly connected to an elastic plate (103), one end of the elastic plate (103) away from the connecting ring 2 (102) being fixedly connected to a connecting sleeve (104), and the inner wall of the connecting ring 1 (1) being fixedly connected to a connecting ring 3 (105), characterized in that: Also includes: A central mechanism (2), the central mechanism (2) comprising a connecting column (201) rotatably connected to the inner wall of a connecting sleeve (104) via a bearing, a connecting frame (202) being arranged inside the connecting ring (1), the inner wall of the connecting frame (202) being fixedly connected to the connecting column (201), the inner wall of the connecting frame (202) being fixedly connected to a fixing ring (204), the front end of the connecting frame (202) being fixedly connected to a controller (106), the rear side of the controller (106) being fixedly connected to a heat conducting plate (107), the outer wall of the heat conducting plate (107) being fixedly connected to the fixing ring (204), and the elastic plate (103) being used to dampen the movement of the moving part of the central mechanism (2) within the connecting ring (1).

2. A marine permanent magnet synchronous motor controller according to claim 1, characterized in that: The front end of the connection frame (202) is fixedly connected to a magnetic attraction ring 1 (108), the inner wall of the connection frame (202) is movably connected to a magnetic attraction ring 2 (203), and the end of the magnetic attraction ring 2 (203) away from the magnetic attraction ring 1 (108) is fixedly connected to a cover plate (109), and the magnetic attraction ring 1 (108) and the magnetic attraction ring 2 (203) attract each other, thereby facilitating the removal of the cover plate (109).

3. A marine permanent magnet synchronous motor controller according to claim 2, characterized in that: The side of the fixed ring (204) away from the connection frame (202) is fixedly connected to the second heat conducting plate (205), the outer wall of the second heat conducting plate (205) is movably connected to a limiting ring (206), the side of the limiting ring (206) away from the connection frame (202) is movably connected, and the movement range of the movable part of the central mechanism (2) is controlled by the limiting ring (206).

4. A marine permanent magnet synchronous motor controller according to claim 3, characterized in that: The outer wall of the limiting ring (206) is fixedly connected to a connecting ring four (207), the inner wall of the connecting ring four (207) is fixedly connected to an elastic component (210), the side of the connecting ring four (207) away from the limiting ring (206) is fixedly connected to a circular plate one (208), the end of the circular plate one (208) close to the limiting ring (206) is fixedly connected to a heat conducting plate three (209), the outer wall of the heat conducting plate three (209) is movably connected to the heat conducting plate two (205), and the elastic component (210) further reduces the vibration of the movable part of the central mechanism (2).

5. A marine permanent magnet synchronous motor controller according to claim 4, characterized in that: The outer wall of the circular plate one (208) is fixedly connected to a connecting ring five (2011); the side of the circular plate one (208) away from the connecting frame (202) is fixedly connected to an arc plate (2013); the side of the circular plate one (208) away from the connecting frame (202) is fixedly connected to a lifting plate (2012); the outer wall of the lifting plate (2012) is fixedly connected to the arc plate (2013); the side of the lifting plate (2012) away from the circular plate one (208) is fixedly connected to a raised plate (2014); the arc plate (2013 plays a role in controlling the direction of airflow entry.

6. A marine permanent magnet synchronous motor controller according to claim 5, characterized in that: The arc-shaped plate (2013) is fixedly connected to a circular plate (2015) on one side away from the circular plate (208); a circular hole (2017) is provided at the center of the circular plate (2015); an annular plate (2016) is fixedly connected to the outer wall of the circular plate (2015); the outer wall of the annular plate (2016) is fixedly connected to the connecting ring (102); the circular hole (2017) serves to allow gas to flow out of the device.

7. A marine permanent magnet synchronous motor controller according to claim 6, characterized in that: The side of the annular plate 1 (216) close to the connecting frame (202) is rotatably connected to the internal gear (2022) via a bearing, the side of the internal gear (2022) away from the annular plate 1 (216) is fixedly connected to the annular plate 2 (2021), the side of the annular plate 2 (2121) away from the internal gear (222) is fixedly connected to the turbofan (2020), the end of the turbofan (2020) away from the annular plate 2 (221) is rotatably connected to the connecting ring 4 (207) via a bearing, and the end of the turbofan (2020) away from the connecting ring 4 (207) is rotatably connected to the circular plate 2 (215) via a bearing, and the rotation of the turbofan (2020 serves to suck external gas into the interior of the device.

8. A marine permanent magnet synchronous motor controller according to claim 7, characterized in that: The inner wall of the annular plate 1 (2016) is fixedly connected to a motor (2018), and the output end of the motor (2018) is fixedly connected to a gear 1 (2019), and the gear 1 (2019) is meshed with an internal gear (2022). When the motor (2018) is started, the gear 1 (2019) is driven to rotate, thereby providing power for the rotation of the turbofan (2020).

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