High-power-density permanent magnet synchronous motor

Abstract

The invention relates to the technical field of motors, and discloses a high-power-density permanent magnet synchronous motor which comprises a motor shell, a wire clamping mechanism is fixedly connected to the top end of the exterior of the motor shell, dismounting mechanisms are fixedly connected to the front side and the rear side of the exterior of the motor shell, and a connecting rod is fixedly connected to the right side of the exterior of the motor shell. The wire clamping mechanism comprises a rubber plug, a plurality of shells are fixedly connected to the interior of the rubber plug, and elastic assemblies are arranged in the shells. According to the invention, the wire clamping plate slides along the sliding rod connected with the wire clamping plate under the pushing of the extrusion force, and the sliding rod is in contact with the spring I in the shell, so that in the sliding process of the wire clamping plate, pressure is applied to the spring I, and the elastic force generated by deformation of the spring I interacts with the extrusion force of the bunched wire; and the self-adaptive arrangement of the wire harnesses can ensure that the wire harnesses are always kept in a good state in the operation process of the motor.

Description

Technical Field

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

[0002] High power density permanent magnet synchronous motor has high efficiency, usually up to 90% or more. This means that under the same input power, the motor can output greater torque and power, so it is widely used in electric vehicles, industrial robots, aerospace and medical equipment, especially in medical equipment, such as electric massage seats, which can drive the massage mechanism inside the electric massage seat to achieve a stronger and more precise massage effect. When using the electric massage seat, users can feel a deeper and more comfortable massage experience.

[0003] Chinese patent CN222169513U discloses a high-efficiency motor with multi-slot pole matching, including a stator core and a rotor core arranged at the middle position of the stator core; a resin frame is arranged at the end position of the core, a stator winding is arranged at the inner side position of the resin frame, a rotor end plate is arranged at the two end positions of the rotor core, a balancing block is arranged at the side position of the rotor end plate, and an electromagnetic block is arranged at the side position of the two end positions of the rotor core. The balancing block improves the quality of the rotor and its products, reduces noise and vibration, and makes the rotor as a whole reach the rated balance. This rotor is installed on both sides, and the electromagnetic block adopts neodymium iron boron permanent magnet. The structure developed and designed for this new motor is currently widely used in the domestic and foreign electric compressor markets, and its characteristics are improved efficiency, material saving, cost reduction, stable operation and effective reduction of motor body noise.

[0004] However, the motor harness in this technical solution cannot be adaptively arranged, and the harness will loosen and shift due to vibration and other factors during the operation of the motor. Once the insulation layer of the harness is worn, it may cause a short circuit in the wires, causing an electrical fire. Especially when the high power density motor is running, the large current generated by the short circuit will bring more serious consequences. In response to the above problems, a high power density permanent magnet synchronous motor is proposed. Summary of the invention

[0005] In order to make up for the above shortcomings, the present invention provides a high power density permanent magnet synchronous motor, aiming to improve the problem that some devices in the prior art cannot adaptively organize the wire bundles, and at the same time, optimize the installation method of the Hall sensor and improve the sensing accuracy of the Hall sensor.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A high power density permanent magnet synchronous motor comprises a motor housing, a wire clamping mechanism is fixedly connected to the top of the motor housing, a disassembly mechanism is fixedly connected to the front and rear sides of the motor housing, and a connecting rod is fixedly connected to the right side of the motor housing; The wire clamping mechanism comprises a rubber plug, a plurality of shells are fixedly connected inside the rubber plug, an elastic component is arranged inside the shell, a limit plate is slidably connected inside the shell, a sliding rod is fixedly connected outside the limit plate, a wire clamping plate is fixedly connected outside the sliding rod, and the rubber plug is fixedly connected outside the top of the motor housing; As a further description of the above technical solution: The elastic component includes a spring 1, and the outer portion of the spring 1 is arranged inside the housing; As a further description of the above technical solution: The disassembly mechanism comprises a mounting frame, the interior of the mounting frame is fixedly connected with a fixed shaft, the exterior of the fixed shaft is rotatably connected with a rotating clamping plate, the exterior of the rotating clamping plate is fixedly connected with a positioning clamping rod, the exterior of the mounting frame is fixedly connected with a telescopic rod, the exterior of the telescopic rod is sleeved with a second spring, and the exterior of the mounting frame is fixedly connected to the front and rear sides of the exterior of the motor housing; As a further description of the above technical solution: A stator core is fixedly connected to the left side of the exterior of the motor housing, and a rotor core is connected to the interior of the stator core; As a further description of the above technical solution: The stator core is fixedly connected with stator windings all around, and the right side of the stator core is fixedly connected with a resin frame; As a further description of the above technical solution: The outer portion of the sliding rod is slidably connected to the inner portion of the housing, and the outer portion of the wire clamping plate is in contact with the outer portion of the housing; As a further description of the above technical solution: The outer portion of the rotating clamping plate is rotatably connected to the inner portion of the mounting frame, and the outer portion of the positioning clamping rod is rotatably connected to the inner portion of the mounting frame; As a further description of the above technical solution: One end of the second spring is fixedly connected to the inside of the mounting frame, and the other end of the second spring is fixedly connected to the outside of the rotating clamping plate; It also includes a Hall sensor installed on one side of the resin frame.

[0007] The beneficial effects of the present invention are: (1) In the present invention, the wire harness needs to be carefully placed inside the wire clamping plate first. After the wire harness enters the wire clamping plate, it will generate an outward squeezing force on the wire clamping plate. Under the push of the squeezing force, the wire clamping plate slides along the sliding rod connected to it, and the sliding rod is in contact with the spring 1 inside the shell. Therefore, during the sliding process of the wire clamping plate, pressure is applied to the spring 1, forcing the spring 1 to change its shape and deform. The elastic force generated by the deformation of the spring 1 interacts with the squeezing force of the wire harness. The adaptive arrangement of the wire harness can ensure that the wire harness always remains in a good state during the operation of the motor. Even if the motor generates vibration, impact, etc. during high-power operation, the wire harness will not easily loosen or shift.

[0008] (2) In the present invention, the operator needs to manually press the rotating card plate. After the rotating card plate is subjected to force, it starts to move inward. During this process, it will exert pressure on the telescopic rod. Since the outer sleeve of the telescopic rod is provided with spring 2, when the telescopic rod is squeezed and contracted, spring 2 will also be deformed due to external pressure. As spring 2 deforms, the rotating card plate drives the positioning card rod to move synchronously, and the positioning card rod gradually releases its original tight engagement relationship with the stator core. Disassembling the stator core can easily replace the damaged part without the need for complex disassembly of the entire motor.

[0009] (3) In the present invention, the power density of the motor is improved by providing as many windings as possible.

[0010] (4) In the present invention, a Hall sensor is mounted on a frame to reduce the magnetic resistance between the Hall sensor and the magnet, thereby improving the sensing accuracy.

[0011] In summary, the present invention has the advantages of arranging wire bundles, disassembly and maintenance, high power density, high transmission accuracy, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A three-dimensional schematic diagram of a high power density permanent magnet synchronous motor proposed by the present invention; Figure 2 A schematic structural diagram of a stator core of a high power density permanent magnet synchronous motor proposed by the present invention; Figure 3 for Figure 2 The enlarged view of point A in the middle; Figure 4 for Figure 2 Enlarged view of point B in the middle. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0014] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0015] Embodiment 1 Reference Figures 1 to 3 , an embodiment provided by the present invention: a high power density permanent magnet synchronous motor, comprising a motor housing 1, the motor housing 1 as the protection and support structure of the motor as a whole, plays a basic but extremely critical role, the motor housing 1 is usually made of high-strength metal material, such as aluminum alloy, this material has good mechanical strength, can withstand a certain degree of external impact and collision, effectively protect the internal precision motor components, the external top of the motor housing 1 is fixedly connected with a wire clamping mechanism, the soft characteristics of the wire clamping mechanism can avoid scratching and damage to the cable sheath during wiring, the front and rear sides of the motor housing 1 are fixedly connected with a disassembly mechanism, the disassembly mechanism includes a mounting frame 8, one side of the mounting frame 8 is fixedly connected to the front and rear sides of the motor housing 1 by welding or other firm methods, providing a solid support foundation for the entire disassembly mechanism; The interior of the mounting frame 8 is fixedly connected with a fixed shaft 9, which is usually a high-strength solid alloy steel shaft. The fixed shaft 9 passes through one end of a rotating card plate 10, so that the rotating card plate 10 can flexibly rotate with the fixed shaft 9 as the axis. The exterior of the fixed shaft 9 is rotatably connected with a rotating card plate 10, which is a long strip of metal plate. One end of the rotating card plate 10 rotates around the fixed shaft 9, and the other end extends outward. The exterior of the rotating card plate 10 is fixedly connected with a positioning card rod 13, which is convenient for quick alignment and insertion into the corresponding card slot during installation. The exterior of the mounting frame 8 is fixedly connected with a telescopic rod 11, which is connected to the interior of the mounting frame 8. The outer part of the telescopic rod 11 is composed of two metal rods nested outside, and the inner rod can slide smoothly inside the outer rod. The outer sleeve of the telescopic rod 11 is provided with a spring 2 12, and the elastic coefficient of the spring 2 12 has been carefully adjusted. When the rotating card plate 10 is rotated to the installation position, the spring 2 12 is in a compressed state. The spring 2 12 provides an inward elastic force for the rotating card plate 10, so that the positioning card rod 13 is tightly clamped to the installation position, ensuring that the motor housing 1 and the stator core 14 are firmly connected. The outside of the mounting frame 8 is fixedly connected to the front and rear sides of the outside of the motor housing 1, and the right side of the outside of the motor housing 1 is fixedly connected with a connecting rod 17, and the connecting rod 17 is mostly a cylindrical solid metal rod; The wire clamping mechanism includes a rubber plug 2. The rubber plug 2 is generally cylindrical, and its material is soft and elastic, and has good insulation performance. The rubber plug 2 fits tightly on the top of the motor housing 1. On the one hand, it can effectively prevent dust, water vapor and other impurities from invading the inside of the motor from the wiring part on the top of the motor, causing damage to the internal electronic components, and plays a reliable sealing role. On the other hand, the softness of the rubber plug 2 can avoid scratching and damage to the cable sheath during the wiring process. The inside of the rubber plug 2 is fixedly connected with a plurality of shells 3. The shells 3 are mostly rectangular hollow structures and are evenly distributed at appropriate positions inside the rubber plug 2. The inside of the shell 3 is provided with an elastic component, and the elastic component includes a spring 4. The spring 4 is made of high-quality alloy spring steel wire and has a suitable elastic coefficient, which can ensure that sufficient elastic force is provided without excessively squeezing the cable due to excessive elastic force. The outside of the spring 4 is arranged inside the shell 3, and the inside of the shell 3 is slidably connected to a limit plate 5. The limit plate 5 is usually made of hard plastic and has a smooth surface. The limit plate 5 fits tightly against the inner wall of the shell 3 and can slide up and down smoothly along the inner wall to play a precise limiting and guiding role. The outside of the limit plate 5 is fixedly connected to a sliding rod 6. The sliding rod 6 is generally a slender cylindrical metal rod. The material of the sliding rod 6 is compatible with the limit plate 5, has good rigidity and certain flexibility, can stably transmit force when subjected to force and is not easy to bend. The outside of the sliding rod 6 is fixedly connected to a wire clamping plate 7. The wire clamping plate 7 is designed to be a thin plate structure with an arc-shaped groove. The surface of the wire clamping plate 7 is covered with a rubber pad. This design can increase the contact friction with the cable. When the cable is inserted, the wire clamping plate 7 is tightly clamped by the elastic force of the spring 4, so that it is firmly in the wiring position. The outside of the rubber plug 2 is fixedly connected to the top of the motor housing 1.

[0016] Embodiment 2 like Figure 3 to Figure 4 As shown, the components that are the same or corresponding to those in the first embodiment are marked with the corresponding figure marks in the first embodiment. For the sake of simplicity, only the differences from the first embodiment are described below. The difference between this second embodiment and the first embodiment is that a stator core 14 is fixedly connected to the left side of the outside of the motor housing 1. The stator core 14 is generally an annular columnar structure. The stator core 14 is made of laminated silicon steel sheets with high magnetic permeability. The high magnetic permeability allows the magnetic field to be efficiently conducted therein, reducing magnetic resistance and thus improving the electromagnetic conversion efficiency of the motor. The inside of the stator core 14 is connected to a rotor core 18. The rotor core 18 is mostly a cylindrical entity and is also made of high-quality magnetic materials. The rotor core 18 is one of the core components for the rotation of the motor. When the motor is powered on, Under the action of the rotating magnetic field generated by the stator core 14, the rotor core 18 drives the shaft connected thereto to rotate rapidly, accurately converting electrical energy into mechanical energy to drive the operation of external devices. The stator core 14 is fixedly connected with stator windings 15 on all sides. The stator windings 15 are usually carefully wound with multiple turns of insulated copper wires. These wires are of moderate thickness and are wrapped with high-strength insulating materials on the outer layer, which can ensure smooth passage of current and effectively prevent short-circuit faults between windings. Furthermore, by setting as many stator windings 15 as possible, the power density of the motor is improved. A resin skeleton 16 is fixedly connected to the right side of the outside of the stator core 14. The resin skeleton 16 generally has a grid-shaped ring structure. The resin skeleton 16 is injection molded with a resin material that is resistant to high temperatures and has excellent insulation properties. The outside of the sliding rod 6 is slidably connected to the inside of the shell 3, and the outside of the wire clamping plate 7 is in contact with the outside of the shell 3. The outside of the rotating clamping plate 10 is rotatably connected to the inside of the mounting frame 8, and the outside of the positioning clamping rod 13 is rotatably connected to the inside of the mounting frame 8. One end of the spring 12 is fixedly connected to the inside of the mounting frame 8, and the other end of the spring 12 is fixedly connected to the outside of the rotating clamping plate 10. When disassembly is required, just gently pull the rotating clamping plate 10 outward to overcome the elastic force of the spring 12, and the motor housing 1 and the stator core 14 can be easily disassembled.

[0017] It also includes a Hall sensor installed on one side of the resin frame 16. It should be noted that the Hall sensor is installed on the resin frame 16 to reduce the magnetic resistance between the Hall sensor and the magnet, improve the induction accuracy, and improve the transmission accuracy of the synchronous motor.

[0018] Working steps Step 1. When performing the operation of clamping the entire wire, first, the wire bundle needs to be carefully placed inside the wire clamping plate 7. After the wire bundle enters the wire clamping plate 7, due to its own certain volume, it will generate an outward squeezing force on the wire clamping plate 7. Under the push of the squeezing force, the wire clamping plate 7 slides along the sliding rod 6 connected to it, and the sliding rod 6 is in contact with the spring 14 inside the shell 3. Therefore, during the sliding process of the wire clamping plate 7, pressure will be applied to the spring 14, forcing the spring 14 to change its shape and deform. The elastic force generated by the deformation of the spring 14 interacts with the squeezing force of the wire bundle, so that the wire bundle can be adaptively clamped inside the rubber plug 2 according to its own thickness, flexibility and other characteristics, thereby achieving a stable and reliable wire clamping effect, ensuring that the lines are regular and orderly, and avoiding safety hazards caused by clutter.

[0019] Step 2. When it comes to the process of disassembling the stator core 14, the operator needs to manually press the rotating card plate 10. After the rotating card plate 10 is subjected to force, it begins to move inward. During this process, it will exert pressure on the telescopic rod 11. Since a spring 2 12 is sleeved on the outside of the telescopic rod 11, when the telescopic rod 11 is squeezed and contracted, the spring 2 12 will also be deformed due to external pressure. As the spring 2 12 is deformed, the rotating card plate 10 drives the positioning card rod 13 to move synchronously, and the positioning card rod 13 gradually releases the originally tight engagement relationship with the stator core 14, and the two are separated. At this time, the operator can smoothly remove the stator core 14 from the corresponding position, which provides convenience for equipment maintenance, component replacement and other operations.

[0020] On the contrary, when the stator core 14 needs to be installed, the operator releases the pressed rotating clamp 10. At this time, the spring 2 12 is no longer squeezed and quickly rebounds by its own elastic force. During the rebound process, the rotating clamp 10 is driven to rotate to the initial position, so that the positioning clamp rod 13 can re-engage with the stator core 14 accurately as the rotating clamp 10 rotates, and the stator core 14 is firmly installed in the predetermined position, ensuring the structural integrity required for the normal operation of the equipment. The whole process is rigorous and logically clear, and both the wire clamping and the disassembly and assembly of the stator core 14 can be carried out in an orderly manner.

[0021] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high power density permanent magnet synchronous motor, comprising a motor housing (1), characterized in that: The stator core (14) is fixedly connected to the left side of the exterior of the motor housing (1), and the rotor core (18) is connected to the interior of the stator core (14); stator windings (15) are fixedly connected to the interior of the stator core (14) on all sides, and a resin frame (16) is fixedly connected to the right side of the exterior of the stator core (14); and a wire clamping mechanism is fixedly connected to the top of the exterior of the motor housing (1).

2. A high power density permanent magnet synchronous motor according to claim 1, characterized in that: Both front and rear sides of the exterior of the motor housing (1) are connected to disassembly mechanisms, and the right side of the exterior of the motor housing (1) is fixedly connected to a connecting rod (17).

3. The high power density permanent magnet synchronous motor according to claim 1, characterized in that: The wire-holding mechanism comprises a rubber plug (2), a plurality of shells (3) are fixedly connected to the inside of the rubber plug (2), an elastic component is arranged inside the shell (3), a limit plate (5) is slidably connected to the inside of the shell (3), a sliding rod (6) is fixedly connected to the outside of the limit plate (5), a wire-holding plate (7) is fixedly connected to the outside of the sliding rod (6), and the outside of the rubber plug (2) is fixedly connected to the top of the motor housing (1).

4. A high power density permanent magnet synchronous motor according to claim 3, characterized in that: The elastic component comprises a spring one (4), the exterior of the spring one (4) being arranged inside the housing (3).

5. The high power density permanent magnet synchronous motor according to claim 2, characterized in that: The disassembly mechanism comprises a mounting frame (8), the interior of the mounting frame (8) is fixedly connected to a fixed shaft (9), the exterior of the fixed shaft (9) is rotatably connected to a rotating clamping plate (10), the exterior of the rotating clamping plate (10) is fixedly connected to a positioning clamping rod (13), the exterior of the mounting frame (8) is fixedly connected to a telescopic rod (11), the exterior of the telescopic rod (11) is sleeved with a second spring (12), and the exterior of the mounting frame (8) is fixedly connected to the front and rear sides of the exterior of the motor housing (1).

6. The high power density permanent magnet synchronous motor according to claim 3, characterized in that: The outside of the sliding rod (6) is slidably connected to the inside of the housing (3), and the outside of the wire clamping plate (7) is in contact with the outside of the housing (3).

7. The high power density permanent magnet synchronous motor according to claim 5, characterized in that: The outside of the rotating clamping plate (10) is rotationally connected to the inside of the mounting frame (8), and the outside of the positioning clamping rod (13) is rotationally connected to the inside of the mounting frame (8).

8. The high power density permanent magnet synchronous motor according to claim 5, characterized in that: One end of the second spring (12) is fixedly connected to the inside of the mounting frame (8), and the other end of the second spring (12) is fixedly connected to the outside of the rotating clamping plate (10).

9. The high power density permanent magnet synchronous motor according to claim 1, characterized in that: It also includes a Hall sensor installed on one side of the resin frame (16).

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