Water-cooled permanent magnet synchronous motor

Abstract

The application relates to a water-cooled permanent magnet synchronous motor, which comprises an end cover, a shell, a stator core, a stator coil, two insulating end plates, a rotor core, a magnetic tile assembly and a sealing seat. The shell is provided with a cavity with two open ends, the end cover and the sealing seat cover the openings at the two ends of the shell respectively, the stator core, the stator coil, the two insulating end plates, the rotor core and the magnetic tile assembly are coaxially arranged in the cavity of the shell, the stator core is sleeved with the stator coil, the winding of the stator coil is embedded in the groove on the inner side of the stator core, the stator coil is sleeved with the magnetic tile assembly, and a gap is arranged between the stator coil and the magnetic tile assembly, the magnetic tile assembly is sleeved with the rotor core, the two insulating end plates are arranged between the two end surfaces of the stator core and the stator coil respectively, the outer wall of the shell is provided with a water inlet nozzle and a water outlet nozzle, the inner wall of the side wall of the shell is provided with a water flow channel, and the water inlet nozzle is communicated with the water outlet nozzle through the water flow channel.

Description

Technical Field

[0001] This application relates to the field of motor technology, and in particular to a water-cooled permanent magnet synchronous motor. Background Technology

[0002] An electric motor is an electromagnetic device that converts or transmits electrical energy based on the law of electromagnetic induction. Its main function is to generate driving torque, and it is often used as a power source for electrical appliances or various machines. The heat dissipation performance of an electric motor is crucial during operation, as it directly affects its efficiency, lifespan, reliability, and performance limits. When an electric motor is running, components such as the windings and core generate heat due to copper and iron losses. If this heat cannot be dissipated in time, it can lead to aging of the insulation materials, demagnetization (in permanent magnet motors), and even burnout of the motor.

[0003] Currently, some motors utilize fans to force airflow over the motor housing surface, accelerating heat dissipation through convection heat transfer. The fan is directly mounted on the motor shaft and rotates with the motor. However, this cooling method not only generates noise, but the presence of the fan also increases the overall length of the equipment. Furthermore, in open environments, it is prone to drawing in dust, fibers, and other debris, clogging the air ducts, and requires regular cleaning. Summary of the Invention

[0004] In view of this, this application proposes a water-cooled permanent magnet synchronous motor.

[0005] According to one aspect of this application, a water-cooled permanent magnet synchronous motor is provided, comprising: an end cover, a housing, a stator core, a stator coil, two insulating end plates, a rotor core, a magnetic tile assembly, and a sealing seat; The housing has a cavity with openings at both ends, and end caps and sealing seats cover the openings at both ends of the housing, respectively; The stator core, stator coil, two insulating end plates, rotor core, and magnetic tile assembly are all housed inside the cavity of the housing and are coaxially arranged. The stator core is fitted with a stator coil, and the winding of the stator coil is embedded in a groove on the inner side of the stator core. The stator coil is fitted with a magnetic tile assembly, and there is a gap between the stator coil and the magnetic tile assembly. The magnetic tile assembly is fitted with a rotor core. Two insulating end plates are respectively set between the two end faces of the stator core and the stator coil. The magnetic tile assembly includes: a magnetic tile sheath and two or more magnetic tiles; the two or more magnetic tiles are arranged around the outside of the rotor core, and a magnetic tile guard plate is provided between any two adjacent magnetic tiles; the magnetic tile sheath is fitted over the outside of all magnetic tiles and magnetic tile guard plates. The outer wall of the shell is provided with an inlet and an outlet. The inner ring of the side wall of the shell is provided with a water flow channel. The inlet is connected to the outlet through the water flow channel, which is suitable for passing coolant from the inlet into the water flow channel and letting it flow out from the outlet to cool the shell.

[0006] In one possible implementation, the end cap has a flange connection plate on the side opposite to the housing.

[0007] In one possible implementation, it also includes: a rotor support, with the rotor core sleeved on the outside of the rotor support, and a spline hole for the rotating shaft to pass through on the inside of the rotor support.

[0008] In one possible implementation, it also includes a rotor end plate, which is disposed on the side of the rotor core away from the sealing seat.

[0009] In one possible implementation, it further includes: a resolver rotor and a resolver stator; the resolver stator is connected to the housing, the resolver stator and the resolver rotor are coaxially arranged, the resolver stator is sleeved on the outside of the resolver rotor and a preset distance is provided between the resolver stator and the resolver rotor.

[0010] In one possible implementation, it further includes: a resolver fixing cover; the resolver fixing cover is disposed on the outside of the resolver stator and fixedly connected to the resolver stator, and the resolver stator is connected to the housing through the resolver fixing cover.

[0011] In one possible implementation, a sealing ring is provided between the housing and the end cap.

[0012] In one possible implementation, the outer wall of the housing is provided with a mounting section, and two aviation connector plugs are mounted on the end of the mounting section opposite to the housing.

[0013] Beneficial effects: The housing can fix the stator core and protect and isolate the internal rotor core and stator core, preventing external interference with the normal operation of the motor and extending the service life of the overall structure. The coolant flows into the water channel of the housing through the inlet, flows fully on the housing through the water channel, and flows out of the water channel from the outlet to form a cooling cycle, cooling the components inside the housing. The structural layout of this application is more compact. By replacing the external fan with an integrated water channel, the axial length of the motor is effectively shortened, meeting the installation requirements of space-constrained scenarios such as engineering machinery, and effectively reducing maintenance costs.

[0014] Other features and aspects of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0015] The accompanying drawings, which are included in and form part of this specification, illustrate exemplary embodiments, features, and aspects of this application together with the specification and serve to explain the principles of this application.

[0016] Figure 1 An exploded view of the structure of a water-cooled permanent magnet synchronous motor according to an embodiment of this application is shown; Figure 2This diagram shows the main structure of a water-cooled permanent magnet synchronous motor according to an embodiment of this application. Figure 3 This diagram shows the main structure of a water-cooled permanent magnet synchronous motor according to an embodiment of this application. Figure 4 This diagram shows the main structural features of the housing according to an embodiment of this application. Figure 5 This diagram shows the main structural features of the housing according to an embodiment of this application. Figure 6 This diagram shows the main structure of the stator coil according to an embodiment of this application; Figure 7 This diagram shows the main structure of the stator core according to an embodiment of this application; Figure 8 A cross-sectional view of a water-cooled permanent magnet synchronous motor according to an embodiment of this application is shown; Figure 9 A cross-sectional view of a water-cooled permanent magnet synchronous motor according to an embodiment of this application is shown; Figure 10 A partial structural diagram of a water-cooled permanent magnet synchronous motor according to an embodiment of this application is shown; Figure 11 A partial structural diagram of a water-cooled permanent magnet synchronous motor according to an embodiment of this application is shown; Figure 12 A partial structural diagram of a water-cooled permanent magnet synchronous motor according to an embodiment of this application is shown; Figure 13 A partial structural diagram of a water-cooled permanent magnet synchronous motor according to an embodiment of this application is shown; Figure 14 A partial structural diagram of a water-cooled permanent magnet synchronous motor according to an embodiment of this application is shown; Figure 15 This diagram shows the main structure of the rotor support according to an embodiment of this application; Figure 16 This diagram shows the main structure of the end cap according to an embodiment of this application.

[0017] End cap 110, housing 100, stator core 200, stator coil 210, insulating end plate 220, rotor core 600, sealing seat 120, water inlet 150, water outlet 140, water inlet nozzle 310, water flow channel 160, water outlet nozzle 300, mounting part 410, aviation connector plug 400, magnetic tile sheath 510, magnetic tile 500, magnetic tile guard plate 520, rotor bracket 740, support ring 742, mounting plate 741, resolver rotor 700, resolver stator 710, resolver fixing cover 720. Detailed Implementation

[0018] Various exemplary embodiments, features, and aspects of the present invention will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0019] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0021] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0022] Furthermore, to better illustrate this utility model, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that this utility model can be implemented even without certain specific details. In some instances, methods, means, components, and circuits well-known to those skilled in the art have not been described in detail, in order to highlight the main points of this utility model.

[0023] Figure 1 An exploded view of the structure of a water-cooled permanent magnet synchronous motor according to an embodiment of this application is shown; Figure 2 This diagram shows the main structure of a water-cooled permanent magnet synchronous motor according to an embodiment of this application. Figure 3This diagram illustrates the main structure of a water-cooled permanent magnet synchronous motor according to an embodiment of this application. The water-cooled permanent magnet synchronous motor includes: an end cover 110, a housing 100, a stator core 200, a stator coil 210, two insulating end plates 220, a rotor core 600, a magnetic tile assembly, and a sealing seat 120. The housing 100 has a cavity with openings at both ends, and the end cover 110 and the sealing seat 120 respectively cover the openings at both ends of the housing 100. The stator core 200, stator coil 210, two insulating end plates 220, rotor core 600, and magnetic tile assembly are all disposed inside the cavity of the housing 100 and coaxially arranged. The outer wall of the stator core 200 is in close contact with the inner wall of the housing 100, and the stator core 200 houses the stator coil 210. The winding 211 of the sub-coil 210 is embedded in the groove inside the stator core 200. The stator coil 210 is fitted with a magnetic tile assembly, and there is a gap between the stator coil 210 and the magnetic tile assembly. The magnetic tile assembly is fitted with the rotor core 600. Two insulating end plates 220 are respectively disposed between the two end faces of the stator core 200 and the stator coil 210. The outer wall of the housing 100 is provided with a water inlet 310 and a water outlet 300. The inner ring of the side wall of the housing 100 is provided with a water flow channel 160. The water inlet 310 is connected to the water outlet 300 through the water flow channel 160, which is suitable for introducing coolant from the water inlet 310 into the water flow channel 160 and flowing out from the water outlet 300 to cool the housing 100. The outer wall of the housing 100 is provided with an aviation connector plug.

[0024] It should be noted here that the housing 100 is used to fix the stator core 200 and stator coil 210, and to protect and isolate the internal rotor core 600, stator core 200, and magnetic tile assembly, preventing external interference with the normal operation of the motor and extending the service life of the overall structure. The stator core 200 is used to generate a rotating magnetic field, and the main function of the rotor core 600 is to be cut by magnetic lines of force in the rotating magnetic field, thereby generating (output) current. Coolant flows into the water flow channel 160 of the housing through the inlet 310, flows fully across the housing 100 through the water flow channel 160, and flows out of the water flow channel 160 through the outlet 300, forming a cooling cycle to cool the components inside the housing 100 and ensure their operational stability. The water-cooling mode adopted in this application has the following advantages compared to the existing air-cooling mode of motors: First, the heat dissipation efficiency is significantly improved. Water has a much higher specific heat capacity than air, and can carry away more heat per unit volume. Furthermore, the water flow channel 160 (e.g., the water flow channel 160 circumferentially arranged on the inner side wall of the housing 100) provides additional cooling. Figure 9(As shown) It can achieve uniform heat exchange and effectively prevent the risk of permanent magnet demagnetization. Secondly, the structural layout is more compact. By replacing the external fan with an integrated water flow channel 160, the overall axial length of the motor is effectively shortened, meeting the installation requirements of space-constrained scenarios such as engineering machinery. At the same time, the double sealing design of the sealing seat 120 and the end cover 110 completely isolates external dust, adapting to highly polluted environments. In addition, the operating noise is significantly reduced, meeting the quiet requirements of precision machine tools. Finally, the maintenance cost is significantly optimized; the water-cooled circuit uses a corrosion-resistant alloy channel, requiring no maintenance during its lifespan, while traditional air-cooled motors require regular cleaning of the fan blades to remove dust, thus effectively reducing maintenance costs. These advantages work synergistically to enable the motor to continuously increase output power under rated operating conditions, with strong stability and high temperature and impact resistance, allowing it to operate stably under conditions of high temperature, high humidity, dust, impact, and vibration.

[0025] In one possible implementation, such as Figure 16 As shown, the end cover 110 has a flange connecting plate 130 on the side opposite to the housing 100. Further, the main body of the end cover 110 has a disc-shaped structure, and a rectangular plate-shaped flange connecting plate 130 is provided on one side of the end cover 110. Two openings 131 (openings 131 are oil supply ports for engine bearing lubricating oil) are provided on the side of the end cover 110. Two or more connecting holes are provided on the side of the end cover 110, which are suitable for connecting the end face of the housing 100. A hole for the shaft to pass through is opened in the middle of the end cover 110, and an annular groove for installing the sealing ring 101 is opened on the side of the end cover 110 facing the housing 100.

[0026] In one possible implementation, such as Figure 4 As shown, the main body of the housing 100 is cylindrical. The outer wall of the housing 100 has two or more mounting holes for connecting the end cap 110. The end cap 110 is fixed to the housing 100 by bolts. The side wall of the housing 100 also has an inlet 150 and an outlet 140. The inlet 150 is for mounting the inlet nozzle 310, and the outlet 140 is for mounting the outlet nozzle 300. A water flow channel 160 is provided inside the side wall of the housing 100. The water flow channel 160 spirals around the circumference of the housing 100 in multiple circles. Coolant entering through the inlet nozzle 310 of the inlet 150 flows through the water flow channel 160, carrying away heat from the housing 100, and finally flows out through the outlet nozzle 300.

[0027] Furthermore, the inlet 150 and the inlet nozzle 310 are connected by a threaded connection, and the outlet 140 and the outlet nozzle 300 are connected by a threaded connection. To improve the sealing performance of the connection, a sealing ring is provided between the inlet 150 and the inlet nozzle 310, and a sealing ring 301 is provided between the outlet nozzle 300 and the outlet 140.

[0028] In one possible implementation, such as Figure 5 As shown, the outer wall of the housing 100 is provided with a mounting portion 410, and two aviation connectors 400 are disposed at the end of the mounting portion 410 away from the housing 100. It should be noted that the main body of the mounting portion 410 is a rectangular housing 100 structure, and two through holes 411 are opened on the end face. The two aviation connectors 400 are inserted into the through holes 411 and fixedly connected to the mounting portion 410. The two aviation connectors 400 are a power aviation connector and a signal interface aviation connector, respectively, and both are electrically connected to the wiring harness of the stator coil 210.

[0029] In one possible implementation, such as Figure 9 As shown, the inner wall of the housing 100 is provided with a groove that matches the stator core 200, and the outer wall of the stator core 200 is embedded in the inner side of the housing 100, so that the stator core 200 is stably installed on the inner side of the housing 100.

[0030] like Figure 8 As shown, multiple windings 211 of the stator coil 210 are sequentially embedded in the first winding clearance slots on the inner side of the stator core 200, and the inner side of the stator core 200 is provided with two or more first winding clearance slots.

[0031] In one possible implementation, such as Figure 12 As shown, the main body of the insulating end plate 220 is a ring-shaped sheet structure, and two or more second winding clearance slots are opened on the inner side of the insulating end plate 220. The insulating end plate 220 is sleeved on the outside of the stator coil 210, and the winding 211 of the stator coil 210 is embedded in the second winding clearance slot of the insulating end plate 220. The two insulating end plates 220 have the same structure, and the two insulating end plates 220 are sleeved on the outside of the stator coil 210 and are respectively located on the two end faces of the stator core 200.

[0032] In one possible implementation, such as Figure 8 and Figure 9 As shown, the magnetic tile assembly includes: a magnetic tile sleeve 510 and two or more magnetic tiles 500; the two or more magnetic tiles 500 are arranged around the outside of the rotor core 600, and a magnetic tile guard plate 520 is provided between any two adjacent magnetic tiles 500; the magnetic tile sleeve 510 is fitted over the outside of all the magnetic tiles 500 and the magnetic tile guard plate 520. Figure 1 As shown, the main body of the magnetic tile sheath 510 has a cylindrical structure, such as... Figure 14As shown, two or more magnetic tiles 500 and magnetic tile sleeves 520 together form a cylindrical structure and are sleeved on the outside of the rotor core 600 and tightly fitted to the rotor core 600. It should be noted that the magnetic tiles 500 are used to provide a magnetic field, forming a constant magnetomotive force source, and the magnetic tile sleeves 510 are used to limit and fix the multiple inner magnetic tiles 500, preventing them from leaving their original positions during high-speed rotation, thereby improving the operational stability of the equipment.

[0033] Furthermore, the main body of the magnetic tile guard plate 520 is a block structure with a certain curvature, the cross-section of the magnetic tile guard plate 520 is a fan-shaped structure, and the two sides of the magnetic tile guard plate 520 match the two sides of the magnetic tile 500 so that the magnetic tile guard plate 520 and the magnetic tile 500 can fit tightly together.

[0034] Preferably, two or more magnetic tiles 500, two or more magnetic tile guard plates 520, and rotor core 600 are fixedly connected by adhesive.

[0035] In one possible implementation, it further includes: a rotor support 740, with the rotor core 600 sleeved on the outside of the rotor support 740. It should be noted that the rotor support 740 is suitable for effectively supporting the outer rotor core 600 and for connecting the shaft. Further, as... Figure 15 As shown, the rotor support 740 includes an integrally connected support ring 742 and mounting plate 741. The support ring 742 is disposed on one side of the mounting plate 741, and the rotor core 600 is sleeved on the outer side of the support ring 742. A connecting protrusion protrudes from the inner sidewall of the rotor core 600, and a matching groove 744 is formed on the outer sidewall of the support ring 742. The connecting protrusion of the rotor core 600 is embedded in the groove 744 of the support ring 742, thereby synchronously driving the rotor support 740 to rotate when the rotor core 600 rotates. The diameter of the mounting plate 741 is larger than the outer diameter of the support ring 741. Figure 9 As shown, the sidewall of the support disk 741 is in close contact with the rotor core 600 and the magnetic tile assembly, thereby defining the position of the rotor core 600 and the magnetic tile assembly.

[0036] Furthermore, such as Figure 15 As shown, a spline hole 743 is provided at the center of the inner side of the rotor support 740 for the rotating shaft to pass through. The rotating shaft is suitable for connection with the rotor support 740 by a key connection so that the rotating shaft can be driven to rotate when the rotor support 740 rotates.

[0037] In one possible implementation, such as Figure 9As shown, it also includes a rotor end plate 730, which is disposed on one side of the rotor core 600. The rotor end plate 730 is disposed on the side of the rotor core 600 away from the sealing seat 120 and covers the end faces of the rotor core 600 and the magnetic tile 500 to limit the position of the rotor core 600 and the magnetic tile 500 and ensure the structural stability of the magnetic tile assembly.

[0038] In one possible implementation, the system further includes a resolver rotor 700 and a resolver stator 710, with the resolver stator 710 connected to the inner wall of the housing 100. The resolver stator 710 and the resolver rotor 700 are coaxially arranged, with the resolver stator 710 sleeved on the outer side of the resolver rotor 700 and a preset distance between them. The resolver rotor 700 is suitable for being sleeved on the outer side of a rotating shaft and fixedly connected to the rotating shaft, thereby driving the resolver rotor 700 to rotate when the rotating shaft rotates.

[0039] It should be noted here that the rotating shaft, as a support structure for the resolver rotor 700 and rotor support 740, is suitable for securely mounting the resolver rotor, rotor support 740, rotor core 600, and magnetic tile assembly within the housing 100, and ensuring that the magnetic tile assembly and stator coil 210 maintain a distance gap to prevent contact and wear. Figure 9 As shown, the rotating shaft can be inserted into the spline hole 743 of the rotor bracket 740, and a bearing can be installed between the rotating shaft and the center hole 102 of the flange connecting plate 130 of the end cover 110. The inner ring of the bearing is fitted with the rotating shaft, and the outer ring of the bearing contacts the inner side wall of the center hole 102, thereby firmly installing the rotating shaft in the housing 100 and ensuring the stable support of the rotating shaft for the rotor core 600 and the magnetic tile assembly.

[0040] In one possible implementation, such as Figure 14 As shown, it also includes: a resolver fixing cover 720; the resolver fixing cover 720 is disposed on the outside of the resolver stator 710 and fixedly connected to the resolver stator 710, the resolver fixing cover 720 is connected to the housing 100 by screws, and the resolver stator 710 is connected to the housing 100 through the resolver fixing cover 720.

[0041] In one possible implementation, a sealing ring 101 is provided between the housing 100 and the end cap 110. The sealing ring 101 is an O-ring to seal the gap between the housing 100 and the end cap 110.

[0042] In one possible implementation, such as Figure 9 As shown, the main body of the sealing seat 120 is annular, and the outer wall is provided with a threaded structure. One end of the sealing seat 120 is clamped inside the opening of the outer shell 100 and threadedly connected to the outer shell 100. A sealing ring is also provided between the sealing seat 120 and the outer shell 100 to seal the gap between them.

[0043] The assembly process of this application is as follows: Phase 1: Stator Assembly Installation (Fixed Part) The stator is the stationary part of the motor and is usually the starting point for installation. 1. Fix the housing 100 onto the assembly table; 2. Install the cooling components. Screw the inlet nozzle 310 and outlet nozzle 300 into the inlet and outlet ports on the side of the housing 100. A sealing gasket 301 is usually required to ensure a seal and prevent coolant leakage. 3. Press the pre-assembled stator core 200 and stator coil 210 (i.e., the wound stator) into the inner cavity of the housing 100. This is an interference fit, requiring special tools to ensure flatness and proper positioning. Press in and install two insulating end plates 220 for electrical insulation and positioning. 4. Install the two aviation connectors (power and signal interfaces) onto the designated mounting parts 410 on the housing, and connect their leads to the internal stator coil 210 wiring harness, ensuring proper insulation and sealing.

[0044] Phase Two: Installing the rotor core 600 and the magnet assembly. This part is the rotating core of the motor and is usually pre-assembled into an assembly before being installed into the stator cavity. 1. Press-fit the rotor core 600 onto the rotor bracket 740, which is then mounted onto the shaft. Attach multiple magnets 500 (permanent magnets) to the outer circumference of the rotor core 600 in a specific polarity arrangement. To prevent the magnets 500 from falling off during high-speed operation, wrap or cover them with a magnet sleeve 510 (usually a carbon fiber or stainless steel sleeve). 2. Carefully insert the entire rotor assembly into the already fixed stator from one end. This process must be extremely careful to avoid scratching or colliding between the magnet assembly and the stator core 200.

[0045] Phase 3: Installing the sealing seat 120 and the sensor. 1. Install the resolver stator 710: Secure the resolver stator 710 (the stationary part of the sensor) to the inside of the resolver fixing cover 720. 2. Install the resolver rotor 700: Press the resolver rotor 700 (the rotating part of the sensor) onto the end of the shaft, ensuring it is strictly coaxial with the shaft. 3. Align the resolver fixing cover 720 with the housing 100 and tighten it with screws to install the resolver stator 710, ensuring a precise, minute air gap between the resolver rotor 700 and the resolver stator 710. 4. Install the sealing seat 120, which serves to prevent dust and protect the sensor wiring harness.

[0046] Phase 4: Installing End Cap 110 and Final Encapsulation. 1. Install End Cap 110. 2. Final Inspection: After installation, check if the shaft rotates smoothly and without jamming. Check electrical performance (coil resistance, insulation resistance). Check if the sensor (resolver) signal is normal.

[0047] The interaction between the magnetic tile 500 and the stator coil 210 achieves high-density energy conversion, forming the basis for high power density; the magnetic tile sheath 510 resists centrifugal force and prevents the magnetic tile 500 from scattering; the resolver rotor 700 and resolver stator 710 accurately detect position, serving as the "eyes" for achieving high-speed and precise control; the water inlet 310 and water outlet 300 connect to the external water circuit, forming a forced water cooling system to ensure heat dissipation requirements under high-speed power; the housing 100, end cover 110, and sealing seat 120 together provide a robust structure and sealing protection, adapting to harsh environments.

[0048] This application ensures mechanical safety at high speeds through the 510 magnetic sheath and solves the heat dissipation problem caused by high speed and high power through a water cooling system. The perfect combination of these design elements makes it a typical high-performance motor suitable for high-speed power generation and drive applications.

[0049] The various embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A water-cooled permanent magnet synchronous motor, characterized in that, include: End caps, housing, stator core, stator coils, two insulating end plates, rotor core, magnetic tile assembly and sealing seat; The housing has a cavity with openings at both ends, and the end cap and the sealing seat respectively cover the openings at both ends of the housing; The stator core, the stator coil, the two insulating end plates, the rotor core, and the magnetic tile assembly are all disposed inside the cavity of the housing and are coaxially arranged. The stator core is fitted with the stator coil, and the winding of the stator coil is embedded in the groove on the inner side of the stator core. The stator coil is fitted with the magnetic tile assembly, and there is a gap between the stator coil and the magnetic tile assembly. The magnetic tile assembly is fitted with the rotor core. The two insulating end plates are respectively disposed between the two end faces of the stator core and the stator coil. The magnetic tile assembly includes: a magnetic tile sleeve and two or more magnetic tiles; the two or more magnetic tiles are arranged around the outside of the rotor core, and a magnetic tile guard plate is provided between any two adjacent magnetic tiles; the magnetic tile sleeve is fitted over the outside of all the magnetic tiles and the magnetic tile guard plate. The outer wall of the housing is provided with a water inlet and a water outlet. The inner ring of the side wall of the housing is provided with a water flow channel. The water inlet is connected to the water outlet through the water flow channel, which is suitable for introducing coolant from the water inlet into the water flow channel and letting it flow out from the water outlet to cool the housing.

2. The water-cooled permanent magnet synchronous motor according to claim 1, characterized in that, The end cap is provided with a flange connection plate on the side opposite to the housing.

3. The water-cooled permanent magnet synchronous motor according to claim 1, characterized in that, Also includes: The rotor support has the rotor core sleeved on the outside of the rotor support, and the inner side of the rotor support has a spline hole for the rotating shaft to pass through.

4. The water-cooled permanent magnet synchronous motor according to claim 3, characterized in that, It also includes a rotor end plate, which is disposed on the side of the rotor core away from the sealing seat.

5. The water-cooled permanent magnet synchronous motor according to claim 4, characterized in that, Also includes: The resolver rotor and resolver stator are connected to the housing and are coaxially arranged with the resolver rotor. The resolver stator is sleeved on the outside of the resolver rotor and there is a preset distance between the resolver stator and the resolver rotor.

6. The water-cooled permanent magnet synchronous motor according to claim 5, characterized in that, Also includes: A resolver fixing cover; the resolver fixing cover is disposed on the outside of the resolver stator and fixedly connected to the resolver stator, and the resolver stator is connected to the housing through the resolver fixing cover.

7. The water-cooled permanent magnet synchronous motor according to claim 1, characterized in that, A sealing ring is provided between the housing and the end cap.

8. The water-cooled permanent magnet synchronous motor according to claim 1, characterized in that, The outer wall of the housing is provided with a mounting part, and two aviation connector plugs are installed at the end of the mounting part opposite to the housing.

Images