Water-cooled outer rotor permanent magnet motor with radiating fins
By designing an annular columnar water chamber and uniformly distributed heat dissipation fins in a water-cooled outer rotor permanent magnet synchronous motor, the problem of insufficient cooling area in the cooling box in the prior art is solved, more efficient heat absorption and dissipation is achieved, and the motor is improved power density.
Patent Information
- Application Number
- CN202421080881.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-17
- Publication Date
- 2025-02-07
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The cooling box of the existing water-cooled outer rotor permanent magnet synchronous motor is simple in structure, smooth in the inner wall, and limited in heat dissipation or heat absorption area, resulting in unqualified temperature rise of the motor windings and limiting the power density of the motor.
A water-cooled outer rotor permanent magnet motor with heat dissipation wings is designed. The water cavity wraps the rotor shaft in a ring columnar shape, and several evenly distributed heat dissipation wings are installed inside to increase the heat dissipation or heat absorption area.
By increasing the contact area of the heat dissipation wings, the contact efficiency between the coolant and the permanent magnet motor is improved, the cooling water takes away enough heat, the temperature rise of the motor windings is reduced, and the power density of the motor is increased.
Smart Images
Figure CN222441450U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of permanent magnet motors, in particular to a water-cooled outer rotor permanent magnet motor with heat dissipation fins. Background Art
[0002] Permanent magnet motors are generally divided into inner rotor permanent magnet motors and outer rotor permanent magnet motors. Inner rotor permanent magnet motors generally dissipate heat through the outer shell heat sink and the rear end shaft directly connected to a fan blade that rotates synchronously; outer rotor permanent magnet motors generally use independent air ducts and independent cooling fans for air cooling, or use cooling water tanks for water cooling.
[0003] The cooling box of the current water-cooled outer rotor permanent magnet synchronous motor has a simple structure, a smooth inner wall, and a limited heat dissipation or heat absorption area, which results in unqualified temperature rise of the motor winding and limits the power density of the motor. Utility Model Content
[0004] The utility model aims at the deficiencies in the prior art and provides the following technical solutions: a water-cooled outer rotor permanent magnet motor with heat dissipation fins, comprising an outer cylinder, one end of the outer cylinder being fixedly mounted with an end seat by bolts, the other end of the outer cylinder being fixedly mounted with a stator by bolts, the surface of the stator being fixedly connected with an iron core, the surface of the iron core being wound with a coil, one end of the stator being fixedly mounted with a stator seat by bolts, the surface of the stator seat being provided with a water inlet and a water outlet, the interior of the stator being provided with a water cavity, the water cavity being interconnected with the water inlet and the water outlet, a plurality of heat dissipation fins being arranged inside the water cavity, the heat dissipation fins being fixedly connected to the stator, the interior of the stator being rotatably connected with a rotating shaft by a ball bearing, the surface of the rotating shaft being connected with a rotor, the rotor being arranged corresponding to the iron core, and the rotating shaft being rotatably connected with the end seat by a ball bearing.
[0005] As an improvement of the above technical solution, the water cavity is in the shape of a ring column, and the water cavity wraps the rotating shaft.
[0006] As an improvement of the above technical solution, the plurality of heat dissipation fins are evenly distributed inside the water cavity.
[0007] As an improvement of the above technical solution, the projection of the iron core on the water cavity is located on the side surface of the water cavity.
[0008] Beneficial effects of the utility model:
[0009] Since the heat sink and the coolant can be in full contact, the contact area between the coolant and the inside of the permanent magnet motor can be increased by setting the heat sink. Therefore, the heat sink of the water-cooled outer rotor permanent magnet synchronous motor with heat sink increases the heat dissipation or heat absorption area, so that the cooling water takes away enough heat, and the temperature rise of the motor winding is qualified, thereby improving the power density of the motor. After the coolant absorbs a certain amount of heat, it is discharged from the water outlet. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a cross-sectional structural diagram of the water-cooled outer rotor permanent magnet motor of the utility model;
[0011] Figure 2 This is the AA cross-sectional structural diagram of the water-cooled outer rotor permanent magnet motor of the utility model.
[0012] Figure numerals: 1. outer cylinder; 2. end seat; 3. stator; 4. iron core; 5. coil; 6. stator seat; 7. water inlet; 8. water outlet; 9. rotating shaft; 10. rotor; 11. water cavity; 12. cooling fin. DETAILED DESCRIPTION
[0013] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.
[0014] See also Figure 1-2 The utility model provides a technical solution: a water-cooled outer rotor permanent magnet motor with heat dissipation fins, comprising an outer cylinder 1, one end of the outer cylinder 1 is fixedly installed with an end seat 2 by bolts, the other end of the outer cylinder 1 is fixedly installed with a stator 3 by bolts, the surface of the stator 3 is fixedly connected with an iron core 4, the surface of the iron core 4 is wound with a coil 5, one end of the stator 3 is fixedly installed with a stator seat 6 by bolts, the surface of the stator seat 6 is provided with a water inlet 7 and a water outlet 8, the inside of the stator 3 is provided with a water cavity 11, the water cavity 11 is interconnected with the water inlet 7 and the water outlet 8, a plurality of heat dissipation fins 12 are arranged inside the water cavity 11, the heat dissipation fins 12 are fixedly connected to the stator 3, the inside of the stator 3 is rotatably connected with a rotating shaft 9 by a ball bearing, the surface of the rotating shaft 9 is connected with a rotor 10, the rotor 10 is arranged corresponding to the iron core 4, and the rotating shaft 9 is rotatably connected to the end seat 2 by a ball bearing.
[0015] In this embodiment, the coil 5 is first energized, and the coil 5 cooperates with the iron core 4 to generate a magnetic field, so that the rotor 10 rotates. As the rotor 10 rotates, the shaft 9 rotates. At the same time, coolant is introduced into the water inlet 7, and the coolant fills the water cavity 11, which can absorb the heat generated inside the working permanent magnet motor. At the same time, since the heat dissipation fins 12 can be in full contact with the coolant, the contact area between the coolant and the inside of the permanent magnet motor can be increased by providing the heat dissipation fins 12. Therefore, the heat dissipation fins 12 of the water-cooled outer rotor permanent magnet synchronous motor with the heat dissipation fins 12 increase the heat dissipation or heat absorption area, so that the cooling water takes away enough heat, so that the temperature rise of the motor winding is qualified, and the power density of the motor is improved. After the coolant absorbs a certain amount of heat, it is discharged from the water outlet 8.
[0016] Specifically, the water cavity 11 is in a ring-column shape, and the water cavity 11 wraps the rotating shaft 9 .
[0017] In this embodiment, since the water cavity 11 is in the shape of an annular column, the cooling liquid can evenly absorb heat from the inside of the permanent magnet motor, so as to achieve a better purpose of cooling the permanent magnet motor.
[0018] Specifically, a plurality of heat dissipation fins 12 are evenly distributed inside the water cavity 11 .
[0019] In this embodiment, since the heat dissipation fins 12 are evenly distributed inside the water cavity 11, the coolant can contact the water cavity 11 more evenly, so that the permanent magnet motor can absorb heat more evenly.
[0020] Specifically, the projection of the iron core 4 on the water cavity 11 is located on the side surface of the water cavity 11 .
[0021] In this embodiment, the area of the water cavity 11 can be set to be larger than the area of the iron core 4, so as to ensure that all sides of the iron core 4 are close to or in contact with the water cavity 11, thereby achieving the effect of all-round heat dissipation for the iron core 4 with the coil 5 wound around the surface.
[0022] Working principle and use process: First, the coil 5 is energized, and the coil 5 cooperates with the iron core 4 to generate a magnetic field, so the rotor 10 rotates. As the rotor 10 rotates, the shaft 9 rotates. At the same time, coolant is introduced into the water inlet 7, and the coolant fills the water cavity 11, which can absorb the heat generated inside the working permanent magnet motor. At the same time, since the heat dissipation fins 12 and the coolant can be fully in contact, the contact area between the coolant and the inside of the permanent magnet motor can be increased by setting the heat dissipation fins 12. Therefore, the heat dissipation fins 12 of the water-cooled outer rotor permanent magnet synchronous motor with heat dissipation fins 12 increase the heat dissipation or heat absorption area, so that the cooling water takes away enough heat, and the electric The temperature rise of the motor winding is qualified, and the power density of the motor is improved. After the coolant absorbs a certain amount of heat, it is discharged from the water outlet 8; since the water cavity 11 is in a cylindrical shape, the coolant can evenly absorb heat from the inside of the permanent magnet motor to achieve a better cooling purpose for the permanent magnet motor; since the heat dissipation fins 12 are evenly distributed inside the water cavity 11, the coolant can contact the water cavity 11 more evenly, so that the permanent magnet motor can absorb heat more evenly; the area of the water cavity 11 can be set to be larger than the area of the iron core 4, so as to ensure that all sides of the iron core 4 are close to or in contact with the water cavity 11, thereby achieving the effect of all-round heat dissipation of the iron core 4 with the coil 5 wound on the surface.
[0023] The above embodiments are only used to illustrate the technical solution of the present invention, but not to limit it.
Claims
1. A water-cooled outer rotor permanent magnet motor with heat dissipation fins, comprising an outer cylinder (1), characterized in that: An end seat (2) is fixedly mounted on one end of the outer cylinder (1) by means of bolts, a stator (3) is fixedly mounted on the other end of the outer cylinder (1) by means of bolts, an iron core (4) is fixedly connected to the surface of the stator (3), a coil (5) is wound around the surface of the iron core (4), a stator seat (6) is fixedly mounted on one end of the stator (3) by means of bolts, a water inlet (7) and a water outlet (8) are provided on the surface of the stator seat (6), and a water cavity (11) is provided inside the stator (3) ), the water cavity (11) is interconnected with the water inlet (7) and the water outlet (8), a plurality of heat dissipation fins (12) are arranged inside the water cavity (11), the heat dissipation fins (12) are fixedly connected to the stator (3), the interior of the stator (3) is rotatably connected to a rotating shaft (9) via a ball bearing, the surface of the rotating shaft (9) is connected to a rotor (10), the rotor (10) is arranged corresponding to the iron core (4), and the rotating shaft (9) is rotatably connected to the end seat (2) via a ball bearing.
2. The water-cooled outer rotor permanent magnet motor with heat dissipation fins according to claim 1, characterized in that: The water chamber (11) is in the shape of a ring column, and the water chamber (11) wraps around the rotating shaft (9).
3. The water-cooled outer rotor permanent magnet motor with heat dissipation fins according to claim 1, characterized in that: The plurality of heat dissipation fins (12) are evenly distributed inside the water cavity (11).
4. The water-cooled outer rotor permanent magnet motor with heat dissipation fins according to claim 3 is characterized in that: The projection of the iron core (4) on the water cavity (11) is located on the side surface of the water cavity (11).