Energy-saving motor

Abstract

The application provides an energy-saving motor, and particularly relates to the technical field of electric motors, and comprises a motor main assembly, and further comprises: an end heat dissipation cover arranged outside the motor main assembly, a stator assembly, a rotor assembly and a main shaft body arranged in the motor main assembly; the stator assembly comprises a stator casing, a stator core fixed to the inside of the stator casing and a stator winding, and two groups of winding lead-out wires are arranged on the stator winding; the energy-saving motor is provided with the stator assembly, the stator casing, the stator core and the stator winding, the rotor assembly, the rotor core, the eight-pole magnetic ring, the main shaft body, the end heat dissipation cover and the temperature controller, and the mode of cooperating with an external wire group and a temperature controller independent control wire group is adopted, so that the problems of large magnetic circuit loss, poor heat dissipation effect, temperature control and wiring interference and inconvenient maintenance of the existing motor are solved, the motor energy-saving operation is realized, the stable operation of the motor is ensured, and the overall operation reliability and practicability of the motor are improved.

Description

Technical Field

[0001] This application provides an energy-saving motor, specifically relating to the field of electric motor technology. Background Technology

[0002] Electric motors are the core driving components of various power equipment and are widely used in small household appliances, handheld power tools and other fields. Their core requirement is to ensure long-term stable power output, while having a reasonable structural layout, convenient maintenance performance and reliable operational safety, and adapting to the installation and use requirements of different scenarios.

[0003] Among the existing published patents, patent CN202520372506.9 discloses a lead wire assembly and a motor using it. This motor includes a terminal connector, a terminal piece, and a lead wire. The lead wire is fixed by the cooperation of a piercing part and a guide groove. This only optimizes the lead wire fixing structure and does not involve magnetic circuit optimization or independent temperature control design. Another patent, CN217469686U, discloses a motor heat dissipation structure that uses an axial straight ventilation channel for heat dissipation, but it does not include a dedicated magnetic coupling optimization structure or an independent temperature control wire assembly.

[0004] These existing technologies have obvious drawbacks: large magnetic circuit losses, poor heat dissipation, easy interference between temperature control structure and wiring components, inconvenient maintenance, and inability to balance operational stability and ease of use, making it difficult to meet the comprehensive use requirements of motors in various scenarios. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, this application provides an energy-saving motor that can effectively solve the related technical problems mentioned in the background art.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] This application discloses an energy-saving motor, including a motor body assembly, and further comprising: an end heat dissipation cover disposed on the exterior of the motor body assembly; a stator assembly, a rotor assembly, and a main shaft disposed within the motor body assembly; the stator assembly comprising: a stator housing and a stator core and a stator winding fixed inside the stator housing, with two sets of winding leads disposed on the stator winding; the rotor assembly comprising a rotor core and an eight-pole magnetic ring, the eight-pole magnetic ring being fixed to one end of the main shaft near the end heat dissipation cover; a front support seat and a rear support seat disposed at both ends of the motor body assembly; a centrifugal fan blade disposed within the front support seat, and a temperature controller disposed on the rear support seat; two sets of external wiring groups and a terminal assembly connected to the ends of the external wiring groups disposed on one side of the top of the motor body assembly, wherein the two sets of external wiring groups are electrically connected to the corresponding winding leads; and an independent control wire group is externally connected to the temperature controller.

[0008] Preferably, the temperature controller is electrically connected to an external circuit via an independent control line group and is connected in series with the power supply circuit of the stator winding.

[0009] Preferably, the end heat sink cover cooperates with the centrifugal fan blades to form a radial centrifugal heat dissipation air duct.

[0010] Preferably, the terminal block assembly has a pluggable structure and is detachably connected to the external wiring group.

[0011] Preferably, the front support is made of aluminum alloy, and the rear support is an integrated injection-molded structure of engineering plastic. Both the front and rear support have built-in bearing positioning ribs and reinforcing ribs.

[0012] Preferably, the eight-pole magnetic ring is coaxially arranged with the rotor core, and the two form a magnetic coupling.

[0013] Preferably, the temperature controller is a bimetallic strip structure and is positioned close to the rear end of the stator housing.

[0014] Preferably, the support arm of the external wiring assembly is provided with a wire fixing groove.

[0015] Preferably, the centrifugal fan blades are forward-swept blades that rotate synchronously with the main shaft.

[0016] Preferably, the end heat dissipation cover is provided with heat dissipation grooves that are adapted to the airflow direction of the centrifugal fan blades.

[0017] In summary, the technical solution provided in this application has at least one of the following advantages compared with the prior art:

[0018] This energy-saving motor solves the problems of high magnetic circuit loss, poor heat dissipation, interference between temperature control and wiring, and inconvenient maintenance in existing motors by setting up stator components (stator housing, stator core, stator windings) and rotor components (rotor core, eight-pole magnetic ring, main shaft and end heat sink, temperature controller, etc.) and using external wiring groups and independent control wiring groups for the temperature controller. This achieves energy-saving operation of the motor, while ensuring stable operation and improving the overall reliability and practicality of the motor.

[0019] The eight-pole magnetic ring forms a stable magnetic coupling with the rotor core, optimizing the internal magnetic circuit structure of the motor, reducing hysteresis loss and eddy current loss, improving the conversion efficiency of electrical energy to mechanical energy, and further enhancing the energy-saving effect of the motor. At the same time, the eight-pole magnetic ring is placed close to the end heat sink, which can avoid overheating and magnetic performance decay, ensuring long-term stable energy-saving effect and extending the service life of the eight-pole magnetic ring and the motor assembly.

[0020] The end heat sink and centrifugal fan blades work together to form a radial centrifugal heat dissipation air duct. The airflow can flow evenly over the stator housing, stator windings, temperature controller and other heat-generating components, effectively improving heat dissipation efficiency, preventing the motor from overheating and reducing operating efficiency, reducing extra energy consumption, and protecting various electrical components, reducing the probability of failure caused by overheating.

[0021] The temperature controller uses an independent control wiring group connected in series with the stator winding power supply circuit. This not only provides overheat protection for the motor but also avoids interference with external wiring groups and winding leads. When repairing or replacing the temperature controller, there is no need to disassemble the external wiring group, improving maintenance convenience. The bimetallic strip temperature controller is tightly fitted to the stator housing, ensuring precise temperature control and further guaranteeing safe and stable motor operation, reducing fault repair costs.

[0022] The front and rear support seats have built-in bearing positioning ribs and reinforcing ribs, which can accurately position the bearings at both ends of the main shaft, reduce mechanical losses caused by the main shaft rotation jamming, improve the strength of the support structure, avoid deformation caused by vibration, ensure stable rotation of the main shaft and centrifugal fan blades, reduce energy consumption, extend the service life of bearings and main shaft, and improve the overall durability of the motor. Attached Figure Description

[0023] Figure 1 This is the main view structure diagram of this application;

[0024] Figure 2 This is a left-side structural diagram of this application;

[0025] Figure 3 This is a right-view structural diagram of this application;

[0026] Figure 4 This is the wiring diagram of the temperature controller in this application.

[0027] The labels in the diagram represent:

[0028] 1. Motor main assembly; 11. Stator housing; 111. Stator core; 12. Front support; 121. Centrifugal fan blades; 13. Main shaft; 14. Stator winding; 141. Winding leads; 15. Rotor core; 16. Rear support; 17. External wiring assembly; 18. Terminal block assembly; 19. End heat sink cover; 20. Temperature controller; 21. Eight-pole magnetic ring. Detailed Implementation

[0029] The present application will be further described below with reference to the embodiments.

[0030] As an example of this application:

[0031] Reference Appendix Figures 1 to 4As shown, an energy-saving motor includes a motor body assembly 1, with an end heat dissipation cover 19 on the outside of the motor body assembly 1; the motor body assembly 1 contains a stator assembly, a rotor assembly, and a main shaft 13; the stator assembly includes a stator housing 11, a stator core 111 fixed inside the stator housing 11, and a stator winding 14, with two sets of winding leads 141 provided on the stator winding 14; the rotor assembly includes a rotor core 15 and an eight-pole magnetic ring 21, the eight-pole magnetic ring 21 being fixed to the main shaft 13 near... One end of the end heat dissipation cover 19; the two ends of the motor body assembly 1 are respectively provided with a front support 12 and a rear support 16; the front support 12 is provided with centrifugal fan blades 121, and the rear support 16 is provided with a temperature controller 20; the top side of the motor body assembly 1 is provided with two sets of external wiring groups 17 and a terminal assembly 18 connected to the end of the external wiring group 17, wherein the two sets of external wiring groups 17 are electrically connected to the corresponding winding lead wires 141; the temperature controller 20 is externally connected with an independent control wire group.

[0032] Specifically, an annular positioning groove is provided on the inner wall of the stator housing 11. The stator core 111 is fixed in the annular positioning groove by interference fit. A stator winding 14 is wound on the stator core 111. The stator winding 14 is made of oxygen-free copper enameled wire. Two sets of winding leads 141 pass through the reserved through holes at the top of the stator housing 11 and are electrically connected to two sets of external wiring groups 17 on one side of the top of the motor body assembly 1. After welding and fixing, an insulating sleeve is installed to prevent leakage or poor contact at the wiring point. This measure can not only ensure the stability of circuit conduction, but also reduce contact resistance, reduce power loss, and achieve the effect of motor energy saving.

[0033] Furthermore, the rotor core 15 is coaxially sleeved on the main shaft 13 and fixedly connected to the main shaft 13 by a flat key to achieve synchronous rotation. The eight-pole magnetic ring 21 is fixed to the end of the main shaft 13 near the end heat sink 19 by adhesive bonding and is coaxially aligned with the rotor core 15. The eight-pole magnetic ring 21 and the rotor core 15 are coaxially arranged, forming a magnetic coupling. Specifically, the setting of the eight-pole magnetic ring 21 is used to optimize the magnetic circuit structure of the motor, reduce hysteresis loss and eddy current loss, improve the conversion efficiency of electrical energy to mechanical energy, and further improve the energy-saving effect of the motor. At the same time, the eight-pole magnetic ring 21 is set near the end heat sink 19, which can help to prevent the magnetic performance of the magnetic ring from decaying due to overheating, thereby further ensuring the stability of the energy-saving effect of the motor.

[0034] The front support 12 and the rear support 16 are respectively fixed to both ends of the motor body assembly 1 by bolts. The front support 12 is made of aluminum alloy, and the rear support 16 is an integrated injection-molded structure of engineering plastic. Both the front support 12 and the rear support 16 have built-in bearing positioning ribs and reinforcing ribs. The bearing positioning ribs can achieve precise positioning of the bearings at both ends of the spindle body 13, prevent the bearings from shifting and causing the spindle to rotate and jam, and reduce mechanical wear. The reinforcing ribs can improve the structural strength of the support and prevent the support from deforming due to vibration when the motor is working, thus ensuring the long-term stable operation of the motor.

[0035] Furthermore, the centrifugal fan blades 121 inside the front support 12 are sleeved on the front end of the main shaft 13 and rotate synchronously with the main shaft 13. The end heat dissipation cover 19 is covered on the rear end of the motor body assembly 1. The end heat dissipation cover 19 and the centrifugal fan blades 121 cooperate to form a radial centrifugal heat dissipation air duct. When the centrifugal fan blades 121 rotate with the main shaft 13, they can draw external cold air into the air duct. The cold air flows radially through the stator housing 11, stator winding 14, temperature controller 20 and octagonal magnetic ring 21, carrying away the heat generated by each component during operation, and then is discharged from the heat dissipation slots of the end heat dissipation cover 19. This air duct structure can make the airflow flow evenly through each heat-generating component of the motor, improve the heat dissipation efficiency, avoid the motor from overheating and causing a decrease in efficiency, and also help the motor save energy.

[0036] Furthermore, the temperature controller 20 is a bimetallic strip structure, positioned close to the rear end of the stator housing 11, effectively monitoring the temperature of the stator housing 11. Its principle is as follows: when the motor operating temperature rises to a set threshold, the bimetallic strip deforms due to the difference in thermal expansion and contraction coefficients, triggering the temperature controller 20 to disconnect the circuit; when the temperature drops to a safe threshold, the bimetallic strip resets, and the temperature controller 20 closes the circuit, achieving overheat protection for the motor. The temperature controller 20 has an independent control wiring group connected externally, one end electrically connected to the temperature controller 20, and the other end extending to the outside of the motor and electrically connected to an external control circuit. The temperature controller 20 is connected in series in the power supply circuit of the stator winding 14 through this independent control wiring group, ensuring effective control of the power supply circuit while avoiding interference with the external wiring group 17. Simultaneously, the independent control wiring group facilitates subsequent maintenance and replacement of the temperature controller 20 without disassembling the external wiring group 17, improving maintenance convenience.

[0037] In addition, the precise temperature control of the thermostat 20 can prevent the motor from consuming extra energy due to overheating, further enhancing the energy-saving effect of the motor.

[0038] The two sets of external wiring groups 17 on one side of the top of the motor main assembly 1 have support arms made of insulating plastic. The support arms of the external wiring groups 17 are provided with wire fixing grooves. The wires of the external wiring groups 17 are embedded and fixed in the wire fixing grooves, which can prevent the wires from shifting or wearing due to motor vibration, avoid leakage or poor contact caused by line damage, ensure the stability of circuit conduction, and reduce power loss. The terminal assembly 18 at the end of the external wiring group 17 has a plug-in structure and can be detachably connected to the external wiring group 17. The plug-in structure can realize the quick connection of the external wiring group 17 to the external power supply, improve the assembly efficiency of the motor, and at the same time, the detachable connection facilitates the subsequent inspection and maintenance of the motor and reduces maintenance costs.

[0039] Furthermore, the eight-pole magnetic ring 21 is made of neodymium iron boron permanent magnet material. Neodymium iron boron permanent magnet material has the advantages of strong magnetic properties and low magnetic loss, which can further optimize the magnetic circuit structure of the motor, improve magnetic coupling efficiency, reduce hysteresis loss and eddy current loss, and further improve the energy-saving effect of the motor. At the same time, neodymium iron boron permanent magnet material has strong stability, which can ensure that the magnetic properties of the eight-pole magnetic ring 21 will not decay after long-term use, thus extending the service life of the motor.

[0040] Furthermore, the end heat sink 19 is provided with heat dissipation grooves that are adapted to the airflow direction of the centrifugal fan blades 121, which can reduce the resistance when the airflow is discharged, improve the airflow efficiency of the heat dissipation duct, and further enhance the heat dissipation effect. The end heat sink 19 is made of engineering plastic and has anti-slip textures on the surface, which not only facilitates the installation and disassembly of the end heat sink 19, but also improves its structural strength and prevents cracking and deformation after long-term use.

[0041] Furthermore, the winding lead 141 of the stator winding 14 is made of high-temperature resistant insulated enameled wire. The high-temperature resistant insulated enameled wire can withstand the high-temperature environment when the motor is working, avoiding short circuit faults caused by aging and damage of the insulation layer of the winding lead 141, and ensuring the safe and stable operation of the motor. At the same time, the high-temperature resistant insulated enameled wire has excellent insulation performance, which can reduce leakage loss and meet the core purpose of motor energy saving.

[0042] Furthermore, the main shaft 13 is made of No. 45 steel. No. 45 steel has the advantages of high strength, good wear resistance, and high toughness. It can withstand the load pressure when the motor is working, avoid the main shaft 13 from bending, breaking and other failures, ensure the stable rotation of the main shaft 13, and reduce mechanical wear. At the same time, the high machining precision of No. 45 steel can ensure the coaxiality of the main shaft 13 with the rotor core 15, the eight-pole magnetic ring 21, and the centrifugal fan blades 121, further reducing mechanical wear and improving the energy-saving effect of the motor.

[0043] Furthermore, the independent control wiring harness of the temperature controller 20 is externally fitted with an insulating protective sleeve. The insulating protective sleeve can prevent wear and leakage of the control wiring harness and ensure safe circuit conduction. At the same time, the insulating protective sleeve has high temperature resistance, which can adapt to the high temperature environment when the motor is working, avoid circuit failure caused by aging and damage of the insulating protective sleeve, and further ensure the safe and stable operation of the motor.

[0044] The complete working and usage principle of the above embodiments is as follows:

[0045] When the energy-saving motor is working, the external power supply is connected to the external wiring group 17 through the terminal assembly 18, and supplies power to the stator winding 14 through the winding lead 141. The stator winding 14 generates an alternating magnetic field, which interacts with the magnetic coupling structure formed by the rotor core 15 and the eight-pole magnetic ring 21, driving the rotor core 15 to drive the main shaft 13 to rotate synchronously. The centrifugal fan blades 121 generate airflow as the main shaft 13 rotates.

[0046] In addition, the temperature of the stator housing 11 is monitored in real time by the temperature controller 20. When it is overheated, the power supply circuit is disconnected and reset after the temperature recovers. The end heat dissipation cover 19 and the centrifugal fan blades 121 cooperate to form an air duct to remove heat from each component. The eight-pole magnetic ring 21 optimizes the magnetic circuit to reduce losses. The front support 12 and the rear support 16 ensure the stable rotation of the main shaft 13. The whole motor main assembly 1 achieves efficient and energy-saving operation.

[0047] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application. It should be understood that in this application, the rotating, sliding, meshing, belt-driven and other moving parts are well lubricated and not prone to slipping or wear, and each of them is provided with a corresponding protective shell. However, in the accompanying drawings of this application, the connection state of each moving part is not shown. It should also be understood that each part in this application is made of metal or plastic material with adaptable strength in the relevant field to ensure that its structural rigidity meets the actual requirements.

Claims

1. An energy-saving motor, comprising a motor body assembly (1), characterized in that, Also includes: The motor body assembly (1) is provided with an end heat dissipation cover (19) on the outside; the motor body assembly (1) is provided with a stator assembly, a rotor assembly and a main shaft (13) inside. The stator assembly includes: a stator housing (11) and a stator core (111) and a stator winding (14) fixed inside the stator housing (11), with two sets of winding leads (141) provided on the stator winding (14). The rotor assembly includes a rotor core (15) and an octagonal magnetic ring (21), the octagonal magnetic ring (21) being fixed to one end of the main shaft (13) near the end heat sink (19); The motor body assembly (1) is provided with a front support seat (12) and a rear support seat (16) at both ends. The front support (12) is provided with centrifugal fan blades (121), and the rear support (16) is provided with a temperature controller (20). The top side of the motor body assembly (1) is provided with two sets of external wiring groups (17) and a terminal assembly (18) connected to the end of the external wiring group (17), wherein the two sets of external wiring groups (17) are electrically connected to the corresponding winding lead (141). The temperature controller (20) is connected to an independent control line group.

2. The energy-saving motor according to claim 1, characterized in that, The temperature controller (20) is electrically connected to the external circuit through an independent control line group and is connected in series with the power supply circuit of the stator winding (14).

3. The energy-saving motor according to claim 1, characterized in that, The end heat dissipation cover (19) and the centrifugal fan blades (121) cooperate to form a radial centrifugal heat dissipation air duct.

4. The energy-saving motor according to claim 1, characterized in that, The terminal block assembly (18) is a plug-in structure and is detachably connected to the external wiring group (17).

5. The energy-saving motor according to claim 1, characterized in that, The front support (12) is made of aluminum alloy, and the rear support (16) is an integrated injection-molded structure of engineering plastic. Both the front support (12) and the rear support (16) have built-in bearing positioning ribs and reinforcing ribs.

6. The energy-saving motor according to claim 1, characterized in that, The octagonal magnetic ring (21) is coaxially arranged with the rotor core (15), and the two form a magnetic coupling.

7. The energy-saving motor according to claim 1, characterized in that, The temperature controller (20) is a bimetallic strip structure and is located close to the rear end of the stator housing (11).

8. The energy-saving motor according to claim 1, characterized in that, The support arm of the external wiring assembly (17) is provided with a wire fixing groove.

9. The energy-saving motor according to claim 1, characterized in that, The centrifugal fan blades (121) are forward-swept blades that rotate synchronously with the main shaft (13).

10. The energy-saving motor according to claim 1, characterized in that, The end heat dissipation cover (19) is provided with heat dissipation grooves, which are adapted to the airflow direction of the centrifugal fan blades (121).

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