A high efficiency synchronous motor

Abstract

The application discloses a high-efficiency synchronous motor, which comprises a motor shell, a stator arranged in the motor shell, a motor shaft arranged at the center of the motor shell, a rotor fixed on the motor shaft and located in the stator, end plates fixed on both ends of the rotor, fans arranged on the end plates, four interval permanent magnet grooves arranged on the rotor and the fans and permanent magnets arranged in the permanent magnet grooves, a cavity arranged in the motor shaft, a first convex ring and a second convex ring arranged at the two sides of the permanent magnets respectively, a plurality of air inlet holes and air outlet holes arranged on the first convex ring and the second convex ring and penetrating through the cavity, a first ring cover and a second ring cover rotatably arranged on the first convex ring and the second convex ring respectively, an air inlet pipe communicated with the first ring cover, an air outlet pipe communicated with the second ring cover, and a wireless temperature sensor arranged at the other end of the motor shaft and extending into the cavity. The motor has the advantages that the rotor surface, the rotor interior, the rotor core and the motor shaft are comprehensively cooled, and the motor has high working efficiency.

Description

Technical Field

[0001] This invention belongs to the field of electric motor technology, specifically relating to a high-efficiency synchronous motor. Background Technology

[0002] An electric motor is a device that converts electrical energy into mechanical energy. It utilizes a rotating magnetic field generated by energized coils (stator windings) to act on the rotor, creating magnetoelectric torque. Electric motors are classified into DC motors and AC motors based on the power source they use. Most motors in power systems are AC motors. A synchronous motor is one where the stator magnetic field speed and the rotor rotation speed are synchronized.

[0003] High efficiency of synchronous motors has always been a research focus. One important factor in improving the efficiency of synchronous motors is how to reduce the conductor (aluminum or copper) losses caused by the current passing through the rotor windings. By controlling the temperature of the rotor during rotation and quickly dissipating heat, conductivity can be improved and rotor losses can be reduced.

[0004] Currently, the common method to reduce the temperature of a rotor during rotation is to install a fan on the side of the rotor for heat dissipation. A Chinese authorized invention patent, an internal heat dissipation salient pole rotor (CN105656231B), proposes that "the high temperature caused by the high speed of the rotor is reduced by using four internal ventilation channels on the laminations and four ventilation openings on the baffle to cooperate with the internal ventilation channels." However, this method still does not provide ideal heat dissipation for the rotor interior and the connected motor shaft, resulting in low efficiency of the synchronous motor. Summary of the Invention

[0005] The purpose of this invention is to provide a high-efficiency synchronous motor to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a high-efficiency synchronous motor, comprising a motor housing, a stator housed within the motor housing, a rotatable motor shaft mounted at the center of the motor housing via a bearing, a rotor fixed on the motor shaft within the stator, end plates fixed at both ends of the rotor, fans mounted on the end plates, four spaced permanent magnet slots penetrating the rotor and the fans and housing permanent magnets thereon, a cavity inside the motor shaft, a first convex ring and a second convex ring respectively located on both sides of the permanent magnets, multiple air inlets and outlets penetrating the cavity on both the first and second convex rings, a first ring cover and a second ring cover rotatably mounted on the first and second convex rings respectively, an air inlet pipe connected to the first ring cover and an air outlet pipe connected to the second ring cover, and a wireless temperature sensor extending into the cavity mounted on the other end of the motor shaft opposite to the output end.

[0007] Preferably, the rotor and the end plate are provided with through slots.

[0008] Preferably, both the first convex ring and the second convex ring are located outside the motor housing.

[0009] Preferably, the two ends of the motor shaft are connected to the middle part by flanges, and the flanges are fixed together by fastening screws. The motor shaft is provided with a mounting groove located on one side of the flange.

[0010] Preferably, the first ring cover and the second ring cover have the same structure, both including left and right halves, and the two halves are provided with corresponding connecting parts, and the two connecting parts are fixedly connected by fastening screws.

[0011] Preferably, the inner walls of the first ring cover and the second ring cover are respectively in close contact with the side walls of the first convex ring and the second convex ring, and gaps are provided between the first ring cover and the outer edge of the first convex ring, and between the second ring cover and the outer edge of the second convex ring.

[0012] Preferably, the rear end cover of the motor housing has multiple ventilation holes spaced around the center, and the ventilation holes are equipped with filters.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. Provides comprehensive heat dissipation to the rotor surface, interior, core, and motor shaft, resulting in high motor efficiency.

[0015] 2. When the motor shaft rotates, it should not drive the first and second ring covers to rotate, and should not interfere with their operation.

[0016] 3. The internal temperature of the motor shaft can be fed back in real time through a wireless temperature sensor, and the speed of the cold air entering the motor shaft can be controlled in real time according to the internal temperature of the motor shaft, providing more intelligent control. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the front cross-sectional structure of the present invention;

[0018] Figure 2 This is a cross-sectional structural schematic diagram of the motor shaft, first convex ring, second convex ring, first ring cover, and second ring cover of the present invention;

[0019] Figure 3 This is a schematic diagram of the motor shaft, permanent magnet, first convex ring, and through groove structure of the present invention.

[0020] Figure 4 This is a schematic diagram of the motor shaft, end plate, fan, first convex ring, and through groove structure of the present invention.

[0021] In the diagram: 1. Motor housing; 2. Stator; 3. Motor shaft; 4. Rotor; 5. End plate; 6. Fan; 7. Permanent magnet; 8. Cavity; 9. First convex ring; 10. Second convex ring; 11. Air inlet; 12. Air outlet; 13. First ring cover; 14. Second ring cover; 15. Air inlet pipe; 16. Air outlet pipe; 17. Wireless temperature sensor; 18. Through slot; 19. Flange; 20. Mounting slot; 21. Connecting part; 22. Ventilation hole. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Example 1: Please refer to Figure 1-4This invention provides a technical solution: a high-efficiency synchronous motor, comprising a motor housing 1, a stator 2 housed within the motor housing 1, a rotatable motor shaft 3 mounted at the center of the motor housing 1 via a bearing, a rotor 4 fixed on the motor shaft 3 within the stator 2, end plates 5 fixed at both ends of the rotor 4, a fan 6 mounted on the end plates 5, four spaced permanent magnet slots penetrating the rotor 4 and the fan 6 and housing permanent magnets 7, a cavity 8 inside the motor shaft 3, and first convex rings 9 and second convex rings 9 respectively located on both sides of the permanent magnets 7. Two convex rings 10, the first convex ring 9 and the second convex ring 10 are each provided with a plurality of air inlet holes 11 and air outlet holes 12 that penetrate the cavity 8. A first ring cover 13 and a second ring cover 14 are respectively rotatably mounted on the first convex ring 9 and the second convex ring 10. An air inlet pipe 15 is connected to the first ring cover 13 and an air outlet pipe 16 is connected to the second ring cover 14. A wireless temperature sensor 17 extending into the cavity 8 is mounted on the other end of the motor shaft 3 opposite to the output end. The stator 2 generates a rotating magnetic field and acts on the rotor 4 to form a magnetoelectric rotational torque, so that the rotor 4 rotates on the stator. The rotor 4 rotates internally, and then connects to the actuator via the motor shaft 3 to perform its work. When the rotor 4 rotates, it drives the fan 6 to rotate, which in turn drives the airflow inside the motor housing 1, providing heat dissipation to the surface of the rotor 4. During operation, it is connected to an external dry cold air supply device through the air inlet pipe 15. The cold air first enters between the first convex ring 9 and the first ring cover 13, and then enters the cavity 8 through the air inlet 11 to provide rapid heat dissipation to the motor shaft 3 and the core of the rotor 4, further improving the heat dissipation capacity. The cooled cold air then flows through the air outlet 12 to the gap between the second convex ring 10 and the second ring cover 14, and then exits from the air outlet pipe 1. 6. Connect the cold air recovery equipment. Since the first ring cover 13 is rotatably connected to the first convex ring 9 and the second ring cover 14 is rotatably connected to the second convex ring 10, the first ring cover 13 and the second ring cover 14 cannot be driven to rotate when the motor shaft 3 rotates, thus not interfering with its operation. During operation, the internal temperature of the motor shaft 3 can be fed back in real time through the wireless temperature sensor 17. The speed of the cold air entering the motor shaft 3 can be controlled in real time according to the internal temperature of the motor shaft 3, providing more intelligent control. Thus, through the ingenious structural design, heat dissipation is provided to the surface, interior, core of the rotor 4 and the motor shaft 3 in all directions, resulting in high motor working efficiency.

[0024] Please see Figure 3-4 The rotor 4 and the end plate 5 are respectively provided with through slots 18; in this embodiment, the through slots 18 provide heat dissipation to the rotor 4, thereby enhancing the heat dissipation capacity of the rotor 4.

[0025] Please see Figure 1The first convex ring 9 and the second convex ring 10 are both located outside the motor housing 1; in this embodiment, it is convenient for the air inlet pipe 15 to be connected to an external drying cold air supply device, and convenient for the air outlet pipe 16 to be connected to an external cold air recovery device.

[0026] Please see Figure 1-2 The two ends of the motor shaft 3 are connected to the middle part by flanges 19, and the flanges 19 are fixed together by fastening screws. The motor shaft 3 is provided with a mounting groove 20 located on one side of the flange 19. In this embodiment, the detachable design of the motor shaft 3 facilitates the opening of its internal cavity 8, and the mounting groove 20 facilitates the installation and removal of the fastening screws on the flange 19.

[0027] Please see Figure 1-2 The first ring cover 13 and the second ring cover 14 have the same structure, both including two halves, left and right, and the two halves are provided with corresponding connecting parts 21. The two connecting parts 21 are fixedly connected by fastening screws. In this embodiment, it is convenient to install and remove the first ring cover 13 and the second ring cover 14 on the first convex ring 9 and the second convex ring 10 respectively.

[0028] Please see Figure 1-2 The inner walls of the first ring cover 13 and the second ring cover 14 are respectively tightly attached to the side walls of the first convex ring 9 and the second convex ring 10. Gaps are provided between the outer edges of the first ring cover 13 and the first convex ring 9, and between the outer edges of the second ring cover 14 and the second convex ring 10. In this embodiment, the tight attachment of the inner walls of the first ring cover 13 and the second ring cover 14 to the side walls of the first convex ring 9 and the second convex ring 10 provides a seal to prevent cold air leakage. By setting gaps, space is provided for cold air between the first convex ring 9 and the first ring cover 13, and between the second convex ring 10 and the second ring cover 14, facilitating the entry and exit of cold air.

[0029] Please see Figure 1 The rear end cover of the motor housing 1 is provided with a plurality of ventilation holes 22 spaced around the center, and the ventilation holes 22 are equipped with filters. In this embodiment, when the fan 6 rotates, the air inside and outside the motor housing 1 can be circulated through the ventilation holes 22, and the filter screen is used to prevent external dust from entering the motor housing 1.

[0030] To facilitate understanding of the above technical solutions of the present invention, the working principle or operation method of the present invention in actual process will be described in detail below.

[0031] Working principle: The stator 2 generates a rotating magnetic field that acts on the rotor 4, creating a magnetoelectric torque that causes the rotor 4 to rotate within the stator 2. This rotation, via the motor shaft 3, connects to the actuator. As the rotor 4 rotates, it drives the fan 6, which in turn circulates air within the motor housing 1, dissipating heat from the surface of the rotor 4. The air also dissipates heat into the rotor 4 through the through-slot 18, enhancing its heat dissipation capacity. Furthermore, during operation, an external dry, cold air supply is connected via the air inlet pipe 15. The cold air first enters between the first convex ring 9 and the first ring cover 13, then enters the cavity 8 through the air inlet hole 11, providing rapid heat dissipation to the motor shaft 3 and the core of the rotor 4, further improving heat dissipation capacity. The cooled air... The air then flows through the air outlet 12 to the gap between the second convex ring 10 and the second ring cover 14, and then connects to the cold air recovery device through the air outlet pipe 16. Since the first ring cover 13 is rotatably connected to the first convex ring 9 and the second ring cover 14 is rotatably connected to the second convex ring 10, the first ring cover 13 and the second ring cover 14 cannot be rotated when the motor shaft 3 rotates, thus not interfering with its operation. During operation, the internal temperature of the motor shaft 3 can be fed back in real time through the wireless temperature sensor 17. The speed of the cold air entering the motor shaft 3 can be controlled in real time according to the internal temperature of the motor shaft 3, providing more intelligent control. Thus, through the ingenious structural design, heat dissipation is provided to the surface, interior, core of the rotor 4 and the motor shaft 3 in all directions, resulting in high motor operating efficiency.

[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high efficiency synchronous motor characterized by, The utility model provides a kind of motor, including motor housing (1), the stator (2) is housed in the motor housing (1), the motor housing (1) center is equipped with rotatable motor shaft (3) by bearing, the motor shaft (3) is fixed with the rotor (4) in the stator (2), the rotor (4) both ends are fixed with end plate (5), the end plate (5) is equipped with fan (6), the rotor (4) and the fan (6) are provided with four interval permanent magnet slots and are equipped with permanent magnet (7) on through, the motor shaft (3) is equipped with cavity (8) inside, the motor shaft (3) is equipped with first convex ring (9) and second convex ring (10) on both sides of the permanent magnet (7) respectively, the first convex ring (9) and the second convex ring (10) are equipped with multiple air inlet holes (11) and air outlet holes (12) on through the cavity (8), the first convex ring (9) and the second convex ring (10) are rotatably equipped with first ring cover (13) and second ring cover (14) respectively, the first ring cover (13) is communicated with air inlet pipe (15), the second ring cover (14) is communicated with air outlet pipe (16), the motor shaft (3) is equipped with wireless temperature sensor (17) to the cavity (8) inside in one end of relative output end.

2. A high efficiency synchronous motor according to claim 1, characterized in that The rotor (4) and the end plate (5) are provided with a through slot (18) corresponding.

3. A high efficiency synchronous motor according to claim 1, wherein The first convex ring (9) and the second convex ring (10) are located outside the motor housing (1).

4. A high efficiency synchronous motor as recited in claim 1, wherein The motor shaft (3) is connected by flange (19) between two ends and middle part, the flange (19) is fixed by fastening screw, the motor shaft (3) is equipped with mounting groove (20) on one side of the flange (19).

5. A high efficiency synchronous motor as recited in claim 1, wherein The first ring cover (13) and the second ring cover (14) are same in structure, and include left and right two halves, and two halves are equipped with corresponding connecting part (21), and two connecting parts (21) are fixedly connected by fastening screw.

6. A high efficiency synchronous motor as recited in claim 1, wherein The inner wall of the first ring cover (13) and the second ring cover (14) is tightly attached to the side wall of the first convex ring (9) and the second convex ring (10) respectively, and the gap is arranged between the outer edge of the first ring cover (13) and the first convex ring (9) and between the outer edge of the second ring cover (14) and the second convex ring (10).

7. A high efficiency synchronous motor as recited in claim 1, wherein The rear end cover of the motor housing (1) is provided with a plurality of ventilation holes (22) around the center, and the ventilation holes (22) are equipped with filter screen.

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