A compact high-density double-stator permanent magnet servo motor mechanism

Abstract

The utility model relates to motor technical field especially relates to a compact high density double stator permanent magnet servo motor mechanism, solved the double stator permanent magnet servo motor to exist structure not enough compact, internal component layout is not enough reasonable, the volume is bigger, power density is not high, and the heat dissipation effect is not good, influence service life etc.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a compact, high-density dual-stator permanent magnet servo motor mechanism. Background Technology

[0002] With the rapid development of industrial automation, robotics, and new energy vehicles, the requirements for servo motors are becoming increasingly stringent. Traditional servo motors have certain limitations in terms of power density, size, and efficiency, making it difficult to meet the growing demand for high precision, high dynamic response, and compact applications. This is especially true in space-constrained applications such as aerospace equipment and portable electronic devices, where motors need to achieve high output power and torque in a small size. In theory, dual-stator permanent magnet servo motors can improve the output performance of motors compared to single-stator motors.

[0003] However, existing dual-stator permanent magnet servo motors have problems such as insufficiently compact structure, unreasonable internal component layout, resulting in large overall motor size, low power density, and poor heat dissipation, which affect the long-term stable operation and service life of the motor.

[0004] Therefore, there is an urgent need to design a compact, high-density dual-stator permanent magnet servo motor mechanism to solve the above problems. Utility Model Content

[0005] (1) Technical problems to be solved

[0006] To address the issues of dual-stator permanent magnet servo motors, such as insufficiently compact structure, unreasonable internal component layout leading to large overall motor size, low power density, and poor heat dissipation, which affect the long-term stable operation and service life of the motor.

[0007] (2) Technical solution

[0008] The technical solution of this utility model is as follows: a compact, high-density dual-stator permanent magnet servo motor mechanism, comprising a motor housing, a dual-stator assembly, a rotor assembly, a shaft, end covers, and a heat dissipation assembly disposed inside the motor housing. The motor housing has a cylindrical structure with openings at both ends, and an annular heat dissipation groove is provided on the inner wall of the motor housing, extending axially along the motor housing. The dual-stator assembly includes a first stator and a second stator, each consisting of a stator core and stator windings wound around the stator core. The first and second stators are arranged sequentially along the axial direction of the motor housing, and the stator cores of the first and second stators are tightly fitted to the inner wall of the motor housing. The outer peripheral surface is provided with heat dissipation protrusions that cooperate with the heat dissipation grooves, and the heat dissipation protrusions are embedded in the heat dissipation grooves; the rotor assembly is located inside the first stator and the second stator, and the rotor assembly includes a rotor core and a permanent magnet disposed on the outer peripheral surface of the rotor core. The rotor core is sleeved on a rotating shaft, and the two ends of the rotating shaft pass through the first stator and the second stator respectively and are rotatably connected to the end cover. The end cover is fixedly installed at the two end openings of the motor housing; the heat dissipation assembly includes heat dissipation fins disposed on the outer side of the motor housing, the heat dissipation fins are fixedly connected to the outer wall of the motor housing, the heat dissipation fins are connected to the heat dissipation grooves, and a cooling fan is also provided at one end of the motor housing, the cooling fan being fixedly installed on the end cover by a bracket.

[0009] Furthermore, the stator windings of the first stator and the second stator adopt a fractional slot concentrated winding form, wherein the pitch of the fractional slot concentrated winding is smaller than the pole pitch.

[0010] Furthermore, the rotor core adopts a built-in permanent magnet structure, with the permanent magnet embedded in the rotor core in a V-shape or U-shape.

[0011] Furthermore, the rotating shaft is provided with a keyway, and the rotor core is fixed by the key engaging with the keyway on the rotating shaft.

[0012] Furthermore, a bearing mounting groove is provided on the inner side of the end cover, and a bearing is installed in the bearing mounting groove. The rotating shaft is rotatably connected to the end cover through the bearing.

[0013] Furthermore, the end cover is also provided with wiring terminals, which are electrically connected to the stator winding.

[0014] (3) Beneficial effects

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. This utility model tightly fits the stator core of the dual stator assembly to the inner wall of the outer casing, and sets heat dissipation protrusions embedded in the heat dissipation groove. At the same time, heat dissipation fins and a cooling fan are set on the outer side of the outer casing, forming a good heat dissipation channel. This can quickly and effectively dissipate the heat generated during motor operation, improve the heat dissipation performance of the motor, ensure that the motor maintains a stable working state during long-term operation, and extend the service life of the motor.

[0017] 2. The stator winding adopts a fractional slot concentrated winding form, which reduces the length of the winding ends and effectively reduces the axial dimension of the motor; the rotor core adopts an internal permanent magnet structure, and the permanent magnet shape and layout are reasonably designed to improve the air gap magnetic flux density and enhance the electromagnetic performance of the motor. This achieves higher power output in a smaller volume, improves the power density of the motor, makes the motor more compact, and ensures stable operation and rotational accuracy of the motor.

[0018] 3. The shaft is connected to the rotor core via a key and to the end cover via a bearing, ensuring stable rotation of the rotor assembly during motor operation; the wiring terminals on the end cover facilitate electrical connections to the motor, making installation and use more convenient. Attached Figure Description

[0019] Figure 1 The diagram shown is a schematic representation of the overall structure of this utility model.

[0020] Figure 2 The diagram shown is an installation diagram of the overall structure of this utility model;

[0021] Figure 3 This utility model is shown Figure 2 Enlarged view of the structure at point A;

[0022] Figure 4 The diagram shown illustrates the assembly of the dual stator assembly and rotor assembly in this utility model.

[0023] Figure 5 The image shown is a rear view of the overall structure of this utility model.

[0024] Explanation of reference numerals in the attached drawings: 1. Motor housing; 2. Dual stator assembly; 21. Heat dissipation groove; 22. First stator; 23. Second stator; 24. Heat dissipation protrusion; 3. Rotor assembly; 31. Permanent magnet; 32. Rotor core; 4. Shaft; 5. End cover; 6. Heat dissipation assembly; 61. Cooling fan; 62. Heat dissipation fins. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] Example 1:

[0027] Please see Figure 1-5 This utility model provides an embodiment: a compact high-density dual-stator permanent magnet servo motor mechanism, including a motor housing 1, a dual-stator assembly 2, a rotor assembly 3, a shaft 4, an end cover 5, and a heat dissipation assembly 6 disposed inside the motor housing 1. The motor housing 1 has a cylindrical structure with openings at both ends, and an annular heat dissipation groove 21 is provided on the inner wall of the motor housing 1, extending along the axial direction of the motor housing 1. The dual-stator assembly 2 includes a first stator 22 and a second stator 23, both of which are composed of a stator core and a winding wound around the stator core. The motor housing 1 is composed of stator windings. The first stator 22 and the second stator 23 are arranged sequentially along the axial direction of the motor housing 1. The stator cores of the first stator 22 and the second stator 23 are tightly fitted to the inner wall of the motor housing 1. The outer circumferential surface of the stator core is provided with heat dissipation protrusions 24 that cooperate with heat dissipation grooves 21, and the heat dissipation protrusions 24 are embedded in the heat dissipation grooves 21. The rotor assembly 3 is located inside the first stator 22 and the second stator 23. The rotor assembly 3 includes a rotor core 32 and permanent magnets 31 disposed on the outer circumferential surface of the rotor core 32. The rotor core 32 is sleeved on the rotating shaft 4. The two sides of the rotating shaft 4... The ends pass through the first stator 22 and the second stator 23 respectively, and are rotatably connected to the end cover 5. The end cover 5 is fixedly installed at the two end openings of the motor housing 1. The heat dissipation assembly 6 includes heat dissipation fins 62 disposed on the outside of the motor housing 1. The heat dissipation fins 62 are fixedly connected to the outer wall of the motor housing 1 and are connected to the heat dissipation groove 21. A cooling fan 61 is also provided at one end of the motor housing 1. The cooling fan 61 is fixedly installed on the end cover 5 by a bracket. The design of the heat dissipation groove 21 provides a path for the conduction of heat inside the motor, which helps to improve the heat dissipation effect. The stator structure design increases the electromagnetic coupling area of ​​the motor and improves the power density of the motor. At the same time, the cooperation between the heat dissipation protrusion 24 and the heat dissipation groove 21 enables the heat generated by the stator to be quickly conducted to the motor housing 1, further enhancing the heat dissipation performance. The design of the rotor assembly 3 ensures the rotational motion of the motor. The permanent magnet 31 provides a magnetic field for the motor, realizing the conversion of electrical energy and mechanical energy. The heat dissipation fins 62 increase the contact area between the motor and the outside air. The setting of the cooling fan 61 accelerates the airflow. The two work together to greatly improve the heat dissipation efficiency of the motor.

[0028] The stator windings of the first stator 22 and the second stator 23 adopt a fractional slot concentrated winding form. The pitch of the fractional slot concentrated winding is smaller than the pole pitch. This winding form can reduce the winding end length, reduce copper loss, improve the efficiency and power density of the motor, and at the same time reduce electromagnetic interference between windings and improve the operating stability of the motor.

[0029] The rotor core 32 adopts a built-in permanent magnet 31 structure. The permanent magnet 31 is embedded in the rotor core 32 in a V-shape or U-shape. The built-in permanent magnet 31 structure can effectively improve the utilization rate of the permanent magnet 31, enhance the air gap magnetic field of the motor, improve the power density and overload capacity of the motor, and at the same time protect the permanent magnet 31, preventing the permanent magnet 31 from being interfered with by external magnetic fields and mechanical damage.

[0030] The rotating shaft 4 is provided with a keyway, and the rotor core 32 is fixed by the key engaging with the keyway on the rotating shaft 4. This connection method can ensure a reliable connection between the rotor core 32 and the rotating shaft 4, transmit a large torque, and ensure the stable operation of the motor.

[0031] The end cover 5 has a bearing mounting groove on its inner side, and a bearing is installed in the bearing mounting groove. The rotating shaft 4 is rotatably connected to the end cover 5 through the bearing. The bearing reduces the friction between the rotating shaft 4 and the end cover 5, improves the rotational accuracy and efficiency of the motor, and reduces the operating noise of the motor.

[0032] The end cover 5 is also equipped with wiring terminals, which are electrically connected to the stator windings. The wiring terminals facilitate the connection between the motor and the external circuit, making the installation and maintenance of the motor more convenient.

[0033] Through the above steps, a cylindrical motor housing 1 with openings at both ends is machined according to the design dimensions during installation. Annular heat dissipation grooves 21 are machined on its inner wall, evenly distributed along the axial direction of the motor housing 1. The stator windings are wound onto the stator core in a fractional-slot concentrated winding configuration. The first stator 22 and the second stator 23 are sequentially installed inside the motor housing 1 along the axial direction, ensuring that the heat dissipation protrusions 24 on the outer circumference of the stator core are embedded in the heat dissipation grooves 21 of the motor housing 1, guaranteeing a tight fit between the stator core and the inner wall of the motor housing 1. Then, the permanent magnet 31 is embedded into the rotor core 32 in a V-shaped or U-shaped structure, forming the rotor assembly 3. The rotor core 32 of the rotor assembly 3 is fitted onto the rotating shaft 4, and the rotor core 32 is fixed to the keyway on the rotating shaft 4 using a key.

[0034] The assembled rotor assembly 3 is placed inside the double stator assembly 2, with both ends of the shaft 4 passing through the first stator 22 and the second stator 23 respectively. The end cover 5 is then installed, and bearing mounting grooves are machined inside the end cover 5. The bearings are then installed in these grooves. The end cover 5 is fixedly installed at both ends of the motor housing 1, allowing the shaft 4 to rotatably connect to the end cover 5 via bearings. Terminal blocks are installed on the end cover 5 and electrically connected to the stator windings. Heat dissipation fins 62 are installed on the outside of the motor housing 1, ensuring they are connected to the heat dissipation grooves 21. A cooling fan 61 is fixedly mounted on the end cover 5 at one end of the motor housing 1 using a bracket, enabling the cooling fan 61 to effectively accelerate airflow and achieve heat dissipation.

[0035] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A compact, high-density dual-stator permanent magnet servo motor mechanism, comprising a motor housing (1), a dual-stator assembly (2), a rotor assembly (3), a shaft (4), an end cover (5), and a heat dissipation assembly (6) disposed inside the motor housing (1), characterized in that: The motor housing (1) has a cylindrical structure with openings at both ends. The inner wall of the motor housing (1) is provided with an annular heat dissipation groove (21), which extends along the axial direction of the motor housing (1). The dual stator assembly (2) includes a first stator (22) and a second stator (23). Both the first stator (22) and the second stator (23) are composed of a stator core and a stator winding wound on the stator core. The first stator (22) and the second stator (23) are arranged sequentially along the axial direction of the motor housing (1). The stator cores of the first stator (22) and the second stator (23) are tightly fitted to the inner wall of the motor housing (1). The outer circumferential surface of the stator core is provided with heat dissipation protrusions (24) that cooperate with the heat dissipation grooves (21). The heat dissipation protrusions (24) are embedded in the heat dissipation grooves (21). The rotor assembly (3) is located in the first stator. The rotor assembly (3) includes a rotor core (32) and a permanent magnet (31) disposed on the outer circumference of the rotor core (32). The rotor core (32) is sleeved on the rotating shaft (4). The two ends of the rotating shaft (4) pass through the first stator (22) and the second stator (23) respectively, and are rotatably connected to the end cover (5). The end cover (5) is fixedly installed at the two ends of the motor housing (1). The heat dissipation assembly (6) includes heat dissipation fins (62) disposed on the outside of the motor housing (1). The heat dissipation fins (62) are fixedly connected to the outer wall of the motor housing (1). The heat dissipation fins (62) are connected to the heat dissipation groove (21). A cooling fan (61) is also provided at one end of the motor housing (1). The cooling fan (61) is fixedly installed on the end cover (5) by a bracket.

2. The compact, high-density dual-stator permanent magnet servo motor mechanism according to claim 1, characterized in that: The stator windings of the first stator (22) and the second stator (23) are in the form of fractional slot concentrated windings, and the pitch of the fractional slot concentrated windings is smaller than the pole pitch.

3. The compact, high-density dual-stator permanent magnet servo motor mechanism according to claim 1, characterized in that: The rotor core (32) adopts a built-in permanent magnet (31) structure, and the permanent magnet (31) is embedded in the rotor core (32) in a V-shape or U-shape.

4. The compact, high-density dual-stator permanent magnet servo motor mechanism according to claim 1, characterized in that: The rotating shaft (4) is provided with a keyway, and the rotor core (32) is fixed by the keyway on the rotating shaft (4).

5. A compact, high-density dual-stator permanent magnet servo motor mechanism according to claim 1, characterized in that: The end cover (5) has a bearing mounting groove on its inner side, and a bearing is installed in the bearing mounting groove. The rotating shaft (4) is rotatably connected to the end cover (5) through the bearing.

6. The compact, high-density dual-stator permanent magnet servo motor mechanism according to claim 1, characterized in that: The end cover (5) is also provided with a wiring terminal, which is electrically connected to the stator winding.

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