Energy-saving motor and driving equipment

Abstract

The invention relates to an energy-saving motor and driving equipment, the energy-saving motor comprises a stator shell and a rotor rotating shaft, a control unit is arranged outside the stator shell, a piezoelectric induction frame is arranged at one end of the stator shell, a bearing is coaxially arranged in the piezoelectric induction frame, the rotor rotating shaft is arranged in the stator shell, and one end of the rotor rotating shaft penetrates through the piezoelectric induction frame. The rotor rotating shaft and the piezoelectric induction frame are rotationally connected through a bearing, a radial compensation device is coaxially arranged outside the stator shell and coaxially arranged outside one end of the rotor rotating shaft, and a radial induction device is coaxially arranged outside one end of the rotor rotating shaft and coaxially arranged outside the other end of the rotor rotating shaft. The piezoelectric induction frame is configured to induce radial resistance borne by the rotor rotating shaft and drive the radial compensation device to apply radial compensation force opposite to the radial resistance to the radial induction device so as to balance the rotor rotating shaft. By balancing the force of the rotor rotating shaft in the radial direction, the resistance of the bearing to the rotor rotating shaft is reduced, and a certain energy-saving effect can be achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy-saving motors, in particular to an energy-saving motor and a driving device. BACKGROUND

[0002] A motor is a device that converts electrical energy into mechanical energy, and its main components are a stator and a rotor. The stator is the stationary part of the motor and mainly includes a stator core and an excitation winding. The rotor is the rotating part of the motor and mainly includes a rotor core, an armature winding, and a commutator. The working principle of the motor is based on the law of electromagnetic induction and the law of electromagnetic force. Electricity in the excitation winding generates electromagnetic torque to drive the rotor to rotate.

[0003] The existing technology discloses a reluctance motor, which comprises a claw pole component and a squirrel cage conductor. The claw pole component is used to generate a stator rotating magnetic field. The squirrel cage conductor cuts the magnetic lines of force of the stator rotating magnetic field to generate an asynchronous starting torque, and pulls the rotor component of the motor into synchronous speed, so that the motor can be started asynchronously.

[0004] However, the above-mentioned and existing motors have the problem that when the driving shaft is connected to a load such as a belt pulley, the load will exert a radial pressure on the driving shaft, thereby increasing the frictional resistance between the driving shaft and the motor bearing. The driving shaft needs to overcome this resistance and do extra work when rotating, thereby increasing the energy consumption of the motor. SUMMARY

[0005] The present application provides an energy-saving motor and a driving device, which can solve the problem that the existing motor generates additional resistance due to the radial pressure on the driving shaft when working, thereby increasing the energy consumption of the motor.

[0006] The technical scheme of the present application is as follows: an energy-saving motor, comprising: a stator housing externally provided with a control unit, one end of the stator housing being provided with a piezoelectric induction frame, the piezoelectric induction frame being coaxially provided with a bearing inside; a hollow rotor shaft inside, the rotor shaft being arranged inside the stator housing, one end of the rotor shaft penetrating through the piezoelectric induction frame and extending to the outside of the stator housing, the rotor shaft being rotatably connected with the piezoelectric induction frame through the bearing, a radial compensation device being coaxially arranged outside the stator housing, the radial compensation device being coaxially arranged outside one end of the rotor shaft, a radial induction device being coaxially arranged outside one end of the rotor shaft, the piezoelectric induction frame being configured to sense the radial resistance received by the rotor shaft and generate a sensing signal, the control unit being configured to receive the sensing signal and drive the radial compensation device to exert a radial compensation force opposite to the radial resistance on the radial induction device to balance the rotor shaft; When the radial induction device rotates with the rotor shaft, it guides airflow into the inside of the rotor shaft to cool the bearing.

[0007] By adopting the above scheme, by arranging the radial compensation device outside the stator shell and arranging the radial induction device capable of sensing the radial compensation device on the rotor rotating shaft, when the load exerts the radial pressure on the rotor rotating shaft, the radial compensation device can provide the radial compensation force opposite to the radial pressure to the rotor rotating shaft, so that the force in the radial direction of the rotor rotating shaft is balanced to a certain extent, thereby reducing the resistance generated by the bearing to the rotor rotating shaft, reducing the work done by the motor to overcome the resistance, and achieving a certain energy-saving effect. In addition, since the radial induction device is arranged on the rotor rotating shaft, the radial induction device can drive the external airflow into the rotor rotating shaft when rotating, thereby removing part of the heat accumulated in the bearing, reducing the wear loss of the bearing, and also reducing the heat accumulation in the entire motor, thereby reducing the increase of power consumption of the motor due to heat accumulation.

[0008] In an embodiment of the present application, the other end of the stator shell is provided with the piezoelectric induction frame, one end of the piezoelectric induction frame is provided with an opening, the other end is provided with a circular through hole for the rotor rotating shaft to penetrate, the opening directions of the two piezoelectric induction frames located at both ends of the stator shell are opposite, the other end of the stator shell is provided with an axial compensation device, the other end of the rotor rotating shaft penetrates through the piezoelectric induction frame and extends to the inside of the axial compensation device, and the other end of the rotor rotating shaft is coaxially provided with an axial induction device. The two piezoelectric induction frames are configured to sense the axial resistance received by the rotor rotating shaft and drive the axial compensation device to exert the axial compensation force opposite to the axial resistance on the axial induction device to balance the rotor rotating shaft.

[0009] By adopting the above technical scheme, the piezoelectric induction frame connected with the bearing is arranged outside the bearing, the piezoelectric induction frame is used to sense the interaction force between the bearing and the piezoelectric induction frame in real time, and then the external radial pressure received by the rotor rotating shaft is sensed, and the radial compensation force is generated by the radial compensation device to balance the radial pressure received by the rotor rotating shaft. In addition, by arranging the piezoelectric induction frame at both ends of the stator shell, the two piezoelectric induction frames are used to sense the axial pressure in two directions received by the rotor rotating shaft, and the axial compensation device is controlled to exert the opposite axial compensation force on the rotor rotating shaft, so that the axial pressure received by the rotor rotating shaft can be balanced to a certain extent.

[0010] In one of the embodiments of the present application, the inner wall of the side of the piezoelectric induction frame is provided with a plurality of first strip-shaped grooves arranged in a circular array, the first strip-shaped grooves are internally provided with first piezoelectric induction components, the first piezoelectric induction components are fixedly connected with the outer ring of the bearing, the rotor shaft is fixedly connected with the inner ring of the bearing, the inner wall of the bottom end of the piezoelectric induction frame is provided with a plurality of second strip-shaped grooves arranged in a circular array outside the circular through hole, the second strip-shaped grooves are internally provided with second piezoelectric induction components, and the second piezoelectric induction components are fixedly connected with the outer ring of the bearing.

[0011] By adopting the above scheme, by arranging a plurality of circumferentially arranged first strip-shaped grooves on the side wall of the piezoelectric induction frame, and using the first piezoelectric induction components arranged in the first strip-shaped grooves to sense the radial pressure received by the bearing on the piezoelectric induction frame, at the same time, a plurality of second strip-shaped grooves arranged in a circular array are arranged on the inner wall of the bottom end of the piezoelectric induction frame, and two piezoelectric induction frames are arranged at the two ends of the rotor shaft, so as to be able to sense the pressure received by the rotor shaft in the axial direction, and the first piezoelectric induction components and the second piezoelectric induction components arranged in a circular array can accurately detect the pressure direction and pressure size of the rotor shaft in the axial and radial directions, which is convenient for subsequent balancing of the pressure received by the rotor shaft in the axial and radial directions.

[0012] In one of the embodiments of the present application, the first piezoelectric induction component and the second piezoelectric induction component each include: A piezoelectric induction sheet, a plurality of piezoelectric induction sheets are arranged one by one in the first strip-shaped grooves and the second strip-shaped grooves respectively; A pressing block, a plurality of pressing blocks are arranged one by one on one side of the first strip-shaped grooves and the second strip-shaped grooves respectively, and the other side of the pressing block is fixedly connected with the outer ring of the bearing.

[0013] By adopting the above scheme, when the rotor shaft receives radial pressure, the radial pressure is pressed by the rotor shaft to the bearing, the bearing is pressed to the pressing block arranged on the inner side wall of the piezoelectric induction frame, the pressing block can press the piezoelectric induction sheet, and the piezoelectric induction sheet is converted into an electric signal after being pressed and is transmitted to the control unit to control the radial induction device to balance the radial pressure. When the rotor shaft receives axial pressure, the axial pressure is pressed by the rotor shaft to the end of the bearing, the end of the bearing is pressed to the pressing block arranged on the inner wall of the bottom end of the piezoelectric induction frame, the pressing block can press the piezoelectric induction sheet, and the piezoelectric induction sheet is converted into an electric signal after being pressed and is transmitted to the control unit to control the axial induction device to balance the axial pressure.

[0014] In one of the embodiments of the present application, the radial compensation device includes: A fixing base is fixedly assembled to one end outside of the stator shell and coaxial with the rotor shaft, a circular through hole is formed in the inside of the fixing base, the diameter of the circular through hole is larger than the diameter of the rotor shaft, and one end of the rotor shaft penetrates through the circular through hole; A plurality of electromagnetic blocks are arranged in the fixing base and arranged in a circular array outside the circular through hole, the radial sensing device is arranged concentrically with the circle of the plurality of electromagnetic blocks, and the plurality of electromagnetic blocks generate a radial compensation force in the radial direction of the rotor shaft after being energized.

[0015] By adopting the above scheme, after the voltage sensing sheet senses the radial pressure, the electromagnetic blocks are energized to generate corresponding electromagnetic forces, the resultant force of the electromagnetic forces generated by the electromagnetic blocks arranged in a circular array balances the radial pressure received by the rotor shaft to a certain extent, and thus the extrusion force of the rotor shaft on the bearing is reduced, so that the work done by the motor to overcome the force is reduced, and the energy consumption is reduced.

[0016] In an embodiment of the present application, the radial sensing device comprises: An assembly disc is coaxially assembled to the other end outside of the rotor shaft; A magnetic ring is coaxially assembled to the outside of the assembly disc and located in the same vertical plane as the electromagnetic blocks.

[0017] By adopting the above technical scheme, the electromagnetic force generated by the electromagnetic blocks after being energized acts on the magnetic ring, and the magnetic ring is arranged on the rotor shaft, so that the electromagnetic blocks can exert a repulsive force on the rotor shaft to balance the radial pressure received by the rotor shaft to a certain extent.

[0018] In an embodiment of the present application, the axial compensation device comprises: A fixing cover is assembled to the other end of the stator shell, the other end of the rotor shaft protrudes from the stator shell, and a cylindrical magnetic block is coaxially assembled to the end face of the other end of the rotor shaft; An axial electromagnet is assembled to the inner wall of the fixing cover and coaxial with the rotor shaft, and the axial electromagnet generates an axial compensation force in the axial direction of the rotor shaft after being energized.

[0019] By adopting the above technical scheme, when the rotor shaft is subjected to an axial force, the axial electromagnet is energized, and then an axial magnetic force can be generated on the columnar magnetic block, the direction of the current flowing through the axial electromagnet is controlled according to the direction of the axial resistance received by the rotor shaft, and then the direction of the magnetic force generated by the axial electromagnet is controlled, so that repulsion or attraction is generated on the columnar magnetic block, and the axial resistance received by the rotor shaft is balanced to a certain extent.

[0020] In an embodiment of the present application, the assembly disc is internally provided with a plurality of vortex vanes, one end of the rotor shaft is externally provided with an air inlet, and the other end is externally provided with an air outlet, an assembly gap is arranged between the fixed cover and the other end of the rotor shaft, the assembly gap is communicated with the air outlet hole, and a plurality of air outlet holes are arranged on the outer side of the fixed cover along the circumferential direction of the fixed cover.

[0021] By adopting the above scheme, when the rotor shaft rotates, the rotor shaft drives the assembly disc to rotate, and the vortex vanes are rotated when the assembly disc rotates, so that the airflow is guided into the air inlet of the rotor shaft, and part of the heat generated by the bearing can also be carried away when the airflow enters the air inlet, and after the airflow enters the air inlet, it passes through the hollow rotor shaft and flows out from the air outlet, and part of the heat accumulated in the motor is carried away, reducing the heat accumulation of the motor.

[0022] In an embodiment of the present application, the stator shell inner wall is provided with a stator magnetic steel, and the rotor shaft is externally provided with a rotor magnetic steel coaxially, and the stator magnetic steel and the rotor magnetic steel generate electromagnetic torque after being energized to drive the rotor shaft to rotate.

[0023] By adopting the above technical scheme, by arranging the stator magnetic steel in the stator shell and arranging the rotor magnetic steel outside the rotor shaft, after being energized, the two generate opposite electromagnetic torque to drive the rotor shaft to rotate.

[0024] The second purpose of the present application is to provide an energy-saving motor driving device.

[0025] In order to achieve the above purpose, the technical scheme of the present application is as follows: an energy-saving motor driving device comprises an energy-saving motor.

[0026] In summary, the present application has at least one of the following beneficial technical effects: 1. By setting piezoelectric induction frame at the bearing between the stator shell and the rotating shaft, using the piezoelectric induction frame to sense the radial pressure received by the rotating shaft, and setting the electromagnetic block in a circular array, and synchronously setting the magnetic ring on the rotating shaft which can sense the magnetic force of the electromagnetic block, the multiple electromagnetic blocks generate repulsive force opposite to the direction of the radial pressure and equal in size, thereby balancing the radial pressure received by the rotating shaft to a certain extent, so that the bearing can reduce the work made by the motor and save energy consumption, and reduce the wear of the bearing.

[0027] 2. By setting two piezoelectric induction frames, and setting a second piezoelectric induction assembly on the inner wall of the bottom end of the piezoelectric induction frame, so that the two piezoelectric induction frames can respectively sense two opposite axial resistances received by the rotating shaft, and by controlling the current direction flowing through the axial electromagnet, the direction of the magnetic force generated by the cylindrical magnetic block on the axial electromagnet is controlled, and then the direction of the axial resistance received by the rotating shaft is balanced.

[0028] 3. By setting the hollow rotating shaft, and connecting the rotating shaft with the outside, and setting the eddy current fan blade on the assembly disc, so that the assembly disc can drive the external airflow into the inside of the rotating shaft when the rotating shaft rotates, thereby taking away the heat accumulated in the bearing and the motor, and improving the heat dissipation capacity of the motor. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a front view of an energy-saving motor provided in the embodiment of the present application; Figure 2 is a front view of an energy-saving motor provided in the embodiment of the present application; Figure 3 is a perspective view of a radial compensation device of an energy-saving motor provided in the embodiment of the present application; Figure 4 is a perspective view of a piezoelectric induction frame of an energy-saving motor provided in the embodiment of the present application; Figure 5 is a perspective view of a piezoelectric induction sheet of an energy-saving motor provided in the embodiment of the present application; Figure 6 is a bearing side view of an energy-saving motor provided in the embodiment of the present application; Figure 7 is a radial induction device side view of an energy-saving motor provided in the embodiment of the present application.

[0030] Explanation of reference signs: 1, stator housing; 11, piezoelectric induction frame; 111, opening; 112, circular through hole; 113, first strip-shaped slot; 114, first piezoelectric induction assembly; 115, second strip-shaped slot; 116, second piezoelectric induction assembly; 117, piezoelectric induction sheet; 118, pressing block; 12, stator magnetic steel; 13, bearing; 2, rotor shaft; 21, radial compensation device; 211, fixed seat; 2111, circular via hole; 212, electromagnetic block; 22, radial induction device; 221, assembly disc; 2211, eddy current fan blade; 222, magnetic ring; 23, axial induction device; 231, columnar magnetic block; 24, air inlet; 25, air outlet; 26, assembly gap; 27, rotor magnetic steel; 3, axial compensation device; 31, fixed cover; 311, exhaust hole; 32, axial electromagnet; 4, control unit. DETAILED DESCRIPTION

[0031] The following will be described in detail in combination with the accompanying drawings. Figures 1-7 An energy-saving motor and a driving device are further described in detail.

[0032] An energy-saving motor provided in the embodiment of the present application comprises a stator housing 1 and a rotor shaft 2.

[0033] Please refer to Figure 1 and Figure 2 The stator housing 1 is provided with a piezoelectric induction frame 11 at one end, the bearing 13 is coaxially arranged inside the piezoelectric induction frame 11, the rotor shaft 2 is arranged inside the stator housing 1, one end of the rotor shaft 2 penetrates through the piezoelectric induction frame 11 and extends to the outside of the stator housing 1, the rotor shaft 2 is rotatably connected with the piezoelectric induction frame 11 through the bearing 13, the radial compensation device 21 is coaxially arranged outside the stator housing 1, the radial compensation device 21 is coaxially arranged outside one end of the rotor shaft 2, the radial induction device 22 is coaxially arranged outside one end of the rotor shaft 2, the piezoelectric induction frame 11 is configured to induce the radial resistance received by the rotor shaft 2 and drive the radial compensation device 21 to exert a radial compensation force on the radial induction device 22, which is opposite to the radial resistance, so as to balance the rotor shaft 2, by arranging the radial compensation device 21 and arranging the radial compensation force of the radial compensation device 21 capable of being induced on the rotor shaft 2, the opposite radial compensation force of the radial compensation device 21 is exerted on the rotor shaft 2, so as to balance the radial resistance received by the rotor shaft 2 to a certain extent. When the radial induction device 22 rotates with the rotor shaft 2, the airflow is guided into the inside of the rotor shaft 2 to cool the bearing 13, the radial induction device 22 can drive the external airflow into the rotor shaft 2 when rotating, so as to carry away part of the heat accumulated in the bearing 13, reduce the wear and tear of the bearing 13, and reduce the heat accumulation in the motor.

[0034] Please continue to see Figure 1 In this embodiment, a control unit 4 is further arranged outside the stator shell 1, the control unit 4 is internally provided with a single-chip microcomputer and a power supply module, the radial sensing device 22 and the axial sensing device 23 are electrically connected with the control unit 4, so that the control unit 4 can control the radial compensation device 21 and the axial compensation device 3 to generate corresponding electromagnetic force to balance the radial resistance and the axial resistance of the rotor shaft 2 after the rotor shaft 2 is subjected to the radial resistance and the axial resistance, wherein the program internally written in the single-chip microcomputer and the electrical connection mode of the control unit 4 with the radial compensation device 21 and the axial compensation device 3 are all realized by the person skilled in the art without the help of external technology. In one of the embodiments of the present application, the control unit 4 can receive voltage signals V1, V2... VN from N first piezoelectric sensing components 114, calculate the size F and the angle θ of the resultant force through a preset algorithm (for example, a vector superposition algorithm or a table lookup method), and then adjust the current applied to the electromagnetic block 212 at the corresponding position through a PID controller according to F and θ to generate a radial compensation force with opposite direction and equal size.

[0035] Please see Figure 2 and Figure 5 , the other end of the stator shell 1 is provided with the piezoelectric sensing frame 11, one end of the piezoelectric sensing frame 11 is provided with an opening 111, the other end is provided with a circular through hole 112 for the rotor shaft 2 to penetrate, the openings 111 of the two piezoelectric sensing frames 11 located at both ends of the stator shell 1 are opposite to each other, the other end of the stator shell 1 is provided with the axial compensation device 3, the other end of the rotor shaft 2 penetrates the piezoelectric sensing frame 11 and extends into the axial compensation device 3, the other end of the rotor shaft 2 is coaxially provided with the axial sensing device 23, the two piezoelectric sensing frames 11 are configured to sense the axial resistance of the rotor shaft 2 and drive the axial compensation device 3 to apply an axial compensation force opposite to the axial resistance to the axial sensing device 23 to balance the rotor shaft 2, by arranging the piezoelectric sensing frame 11 at both ends of the stator shell 1, the two piezoelectric sensing frames 11 are used to sense the axial pressure in two directions of the rotor shaft 2 and control the axial compensation device 3 to apply a reverse axial compensation force to the rotor shaft 2, so that the axial pressure of the rotor shaft 2 can be balanced to a certain extent.

[0036] In the present embodiment, the control unit 4 can receive voltage signals V1, V2... VN from the N second piezoelectric sensing components 116, calculate the resultant force F through a preset algorithm (for example, vector superposition algorithm or look-up table method), and then adjust the current applied to the axial electromagnet 32 through a PID controller according to F, so as to generate an axial compensation force of opposite direction and equal size.

[0037] Please refer to Figure 4 , Figure 5 and Figure 6 , the inner wall of the side of the piezoelectric sensing frame 11 is provided with a plurality of first strip-shaped grooves 113 arranged in a circular array, the first strip-shaped grooves 113 are internally provided with first piezoelectric sensing components 114, the first piezoelectric sensing components 114 are fixedly connected with the outer ring of the bearing 13, the rotor shaft 2 is fixedly connected with the inner ring of the bearing 13, and the inner wall of the bottom end of the piezoelectric sensing frame 11 is provided with a plurality of second strip-shaped grooves 115 arranged in a circular array outside the circular through hole 112, the second strip-shaped grooves 115 are internally provided with second piezoelectric sensing components 116, and the second piezoelectric sensing components 116 are fixedly connected with the outer ring of the bearing 13. By arranging a plurality of first piezoelectric sensing components 114 and second piezoelectric sensing components 116 in a circular array on the side wall and bottom wall of the piezoelectric sensing frame 11 respectively, the pressure direction and pressure size of the rotor shaft 2 in the axial and radial directions can be accurately detected, and the subsequent balancing of the above-mentioned resistance can be facilitated.

[0038] Please refer to FIGS. 2 and Figure 5 , the first piezoelectric sensing components 114 and the second piezoelectric sensing components 116 each include a piezoelectric sensing sheet 117 and a pressing block 118, the piezoelectric sensing sheet 117 is provided with a plurality of piezoelectric sensing sheets 117, and the plurality of piezoelectric sensing sheets 117 are respectively and correspondingly arranged in the first strip-shaped grooves 113 and the second strip-shaped grooves 115, the pressing block 118 is provided with a plurality of pressing blocks 118, and one side of the plurality of pressing blocks 118 is respectively and correspondingly arranged in the first strip-shaped grooves 113 and the second strip-shaped grooves 115, and the other side of the pressing block 118 is fixedly connected with the outer ring of the bearing 13. When the rotor shaft 2 is subjected to radial pressure and axial force, the piezoelectric sensing sheets 117 located in the first strip-shaped grooves 113 and the second strip-shaped grooves 115 can respectively sense the two kinds of forces and control the radial compensation device 21 and the axial compensation device 3 to balance, thereby reducing the resistance that needs to be overcome by the motor when rotating.

[0039] In the present embodiment, the piezoelectric sensing sheet 117 can be a ceramic piezoelectric sensing sheet 117.

[0040] Please refer to Figure 3The radial compensation device 21 comprises a ring-shaped fixing base 211 and electromagnetic blocks 212, the fixing base 211 is fixedly assembled to one end outside of the stator housing 1 and coaxial with the rotor shaft 2, a circular through hole 2111 is formed in the inside of the fixing base 211, the diameter of the circular through hole 2111 is larger than the diameter of the rotor shaft 2, one end of the rotor shaft 2 penetrates through the circular through hole 2111, and a plurality of electromagnetic blocks 212 are arranged in the inside of the fixing base 211 and are arranged in a circular array outside the circular through hole 2111, the radial sensing device 22 is concentrically arranged with the circle where the plurality of electromagnetic blocks 212 are located, and the plurality of electromagnetic blocks 212 generate a radial compensation force in the radial direction of the rotor shaft 2 to the radial sensing device 22 after being energized, and the resultant force of the electromagnetic force generated by the electromagnetic blocks 212 arranged in a circular array can accurately balance the radial resistance received by the rotor shaft 2.

[0041] In the embodiment, the number and placement positions of the first and second strip-shaped grooves 113 and 115 are consistent, and the number and placement positions of the first strip-shaped grooves 113 correspond to the number and placement positions of the electromagnetic blocks 212, and the number of the first strip-shaped grooves 113 and the electromagnetic blocks 212 can be three, and accordingly, the plurality of first strip-shaped grooves 113 are arranged at 120° with each other, and the electromagnetic blocks 212 are also arranged at 120° with each other.

[0042] Please refer to Figure 7 The radial sensing device 22 comprises an assembled disc 221 and a magnetic ring 222, the assembled disc 221 is coaxially assembled to the other end outside of the rotor shaft 2, and the magnetic ring 222 is coaxially assembled to the outside of the assembled disc 221 and located in the same vertical plane as the electromagnetic blocks 212, by arranging the electromagnetic blocks 212 and the magnetic ring 222 on the rotor shaft 2, the electromagnetic blocks 212 can balance the radial pressure received by the rotor shaft 2 to a certain extent.

[0043] In the embodiment, the assembled disc 221 can be an aluminum alloy or a titanium alloy.

[0044] Please refer to Figure 2The axial compensation device 3 comprises a fixed cover 31 and an axial electromagnet 32, the fixed cover 31 is assembled to the other end of the stator shell 1, the other end of the rotor shaft 2 protrudes from the stator shell 1, the end face of the other end of the rotor shaft 2 is coaxially assembled with a columnar magnetic block 231, the axial electromagnet 32 is assembled to the inner wall of the fixed cover 31 and is coaxial with the rotor shaft 2, the axial electromagnet 32 generates an axial compensation force in the axial direction of the rotor shaft 2 after being electrified, and the axial magnetic force of the columnar magnetic block 231 can be generated by electrifying the electromagnet, and the direction of the magnetic force generated by the axial electromagnet 32 is controlled according to the direction of the axial resistance received by the rotor shaft 2, so that the axial resistance received by the rotor shaft 2 is balanced to a certain extent, and the mechanical loss is further reduced.

[0045] Please refer to Figure 7 The inside of the assembly disc 221 is provided with a plurality of vortex vanes 2211, one end of the rotor shaft 2 is externally provided with an air inlet 24, and the other end is externally provided with an air outlet 25, the fixed cover 31 and the other end of the rotor shaft 2 are provided with an assembly gap 26, the assembly gap 26 is communicated with the air outlet hole, and a plurality of exhaust holes 311 are arranged on the outer side of the fixed cover 31 along the circumferential direction of the fixed cover 31, by arranging the assembly disc 221 on the rotor shaft 2, the rotor shaft 2 is rotated to drive the assembly disc 221 to rotate, and then the airflow is guided into the air inlet 24 of the rotor shaft 2, part of the heat accumulated in the bearing 13 and the motor is taken away, the heat loss of the bearing 13 is reduced, and the heat dissipation capacity of the motor is improved.

[0046] Please refer to Figure 2 The inner wall of the stator shell 1 is provided with a stator magnetic steel 12, and the outer surface of the rotor shaft 2 is coaxially provided with a rotor magnetic steel 27, and the stator magnetic steel 12 and the rotor magnetic steel 27 generate electromagnetic torque after being electrified to drive the rotor shaft 2 to rotate, by arranging the stator magnetic steel 12 in the stator shell 1 and arranging the rotor magnetic steel 27 on the outer surface of the rotor shaft 2, the relative electromagnetic torque is generated after being electrified, so that the rotor shaft 2 is driven to rotate.

[0047] The second purpose of the application is to provide an energy-saving motor driving device.

[0048] In order to achieve the above purpose, the technical scheme of the application is as follows: an energy-saving motor driving device comprises an energy-saving motor.

[0049] In summary, when the rotor shaft 2 of the motor is subjected to radial pressure, the rotor shaft 2 exerts radial pressure on the bearing 13, the bearing 13 transmits the radial pressure to the pressing block 118 on the side wall of the piezoelectric induction frame 11, the pressing block 118 extrudes the piezoelectric induction sheet 117, thereby converting mechanical pressure into an electric signal, and then controlling the electromagnetic block 212 to be energized, and generating a corresponding magnetic force, the magnetic force repels the magnetic force of the magnetic ring 222, and the resultant force of the repulsive forces of the plurality of electromagnetic blocks 212 acts on the rotor shaft 2, which can balance the radial pressure received by the rotor shaft 2 to a certain extent, thereby reducing the resistance that the rotor shaft 2 needs to overcome when rotating, reducing the work done, and achieving the effect of saving energy consumption. When the rotor shaft 2 of the motor is subjected to axial force, the rotor shaft 2 drives the bearing 13 to extrude the piezoelectric induction sheet 117 on the inner wall of the bottom end of the piezoelectric induction frame 11, thereby causing the piezoelectric induction to generate a corresponding induced current. At this time, the axial electromagnet 32 inside the fixed cover 31 is energized, and generates a corresponding axial magnetic force, and according to the direction and size of the axial force received by the rotor shaft 2, the direction and size of the current flowing into the electromagnet are controlled, so that the axial electromagnet 32 attracts or repels the cylindrical magnetic block 231, so as to balance the axial force received by the rotor shaft 2, further reducing the loss of the bearing 13, and reducing the energy consumption of the motor.

[0050] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, any equivalent changes made in terms of structure, shape, principle, etc. according to the present application should be covered within the protection scope of the present application.

Claims

1. An energy saving motor characterized by, include: The stator housing (1) is externally equipped with a control unit (4), and a piezoelectric induction frame (11) is provided at one end of the stator housing (1). A bearing (13) is coaxially arranged inside the piezoelectric induction frame (11). A hollow rotor shaft (2) is disposed inside the stator housing (1). One end of the rotor shaft (2) passes through the piezoelectric induction frame (11) and extends to the outside of the stator housing (1). The rotor shaft (2) and the piezoelectric induction frame (11) are rotatably connected by a bearing (13). A radial compensation device (21) is coaxially disposed outside the stator housing (1). The radial compensation device (21) is coaxially disposed outside one end of the rotor shaft (2). A radial sensing device (22) is coaxially disposed outside one end of the rotor shaft (2). The piezoelectric induction frame (11) is configured to sense the radial resistance of the rotor shaft (2) and generate a sensing signal. The control unit (4) is used to receive the sensing signal and drive the radial compensation device (21) to apply a radial compensation force opposite to the radial resistance to the radial sensing device (22) to balance the rotor shaft (2). When the radial sensing device (22) rotates with the rotor shaft (2), it guides the airflow into the interior of the rotor shaft (2) to cool the bearing (13).

2. An energy efficient electric machine as recited in claim 1, wherein: The stator housing (1) is provided with a piezoelectric induction frame (11) at one end. The piezoelectric induction frame (11) has an opening (111) at one end and a circular through hole (112) for the rotor shaft (2) to pass through at the other end. The openings (111) of the two piezoelectric induction frames (11) at both ends of the stator housing (1) are opposite to each other. An axial compensation device (3) is provided at the other end of the stator housing (1). The rotor shaft (2) passes through the piezoelectric induction frame (11) at the other end and extends into the axial compensation device (3). An axial sensing device (23) is coaxially provided at the other end of the rotor shaft (2). The two piezoelectric induction frames (11) are configured to sense the axial resistance of the rotor shaft (2) and drive the axial compensation device (3) to apply an axial compensation force opposite to the axial resistance to the axial sensing device (23) to balance the rotor shaft (2).

3. An energy efficient electric motor as claimed in claim 2, wherein: The inner wall of the piezoelectric sensing frame (11) is provided with a plurality of first strip grooves (113) arranged in a circular array. The first strip groove (113) is provided with a first piezoelectric sensing component (114). The first piezoelectric sensing component (114) is connected and fixed to the outer ring of the bearing (13). The rotor shaft (2) is connected and fixed to the inner ring of the bearing (13). The inner wall of the bottom end of the piezoelectric sensing frame (11) is provided with a plurality of second strip grooves (115) arranged in a circular array outside the circular through hole (112). The second strip groove (115) is provided with a second piezoelectric sensing component (116). The second piezoelectric sensing component (116) is connected and fixed to the outer ring of the bearing (13).

4. An energy efficient electric machine as recited in claim 3 wherein, The first piezoelectric sensing component (114) and the second piezoelectric sensing component (116) each comprise: A plurality of piezoelectric sensing sheets (117) are arranged in the first and second strip-shaped grooves (113, 115) one by one in a one-to-one correspondence; A plurality of pressing blocks (118) are arranged in the first and second strip-shaped grooves (113, 115) one by one in a one-to-one correspondence on one side, and the other side is connected and fixed with the outer ring of the bearing (13).

5. An energy efficient electric motor as claimed in claim 4, wherein: The radial compensation device (21) comprises: A ring-shaped fixing seat (211) is fixedly fitted on one end of the stator shell (1) and coaxial with the rotor shaft (2), a circular through hole (2111) is formed in the inside of the fixing seat (211), the diameter of the circular through hole (2111) is greater than the diameter of the rotor shaft (2), and one end of the rotor shaft (2) penetrates through the circular through hole (2111); A plurality of electromagnetic blocks (212) are arranged in the inside of the fixing seat (211) and are arranged in a circular array outside the circular through hole (2111), the radial sensing device (22) is arranged concentrically with the circle where the plurality of electromagnetic blocks (212) are located, and the plurality of electromagnetic blocks (212) generate a radial compensation force in the radial direction of the rotor shaft (2) after being energized.

6. An energy efficient electric machine as recited in claim 5 wherein: The radial sensing device (22) comprises: A fitting disc (221) is coaxially fitted on the other end of the rotor shaft (2); A magnetic ring (222) is coaxially fitted on the outside of the fitting disc (221) and located in the same vertical plane as the electromagnetic blocks (212).

7. An energy efficient electric motor as claimed in claim 6, wherein: The axial compensation device (3) comprises: A fixed cover (31) is fitted on the other end of the stator shell (1), the other end of the rotor shaft (2) protrudes from the stator shell (1), and a cylindrical magnetic block (231) is coaxially fitted on the end face of the other end of the rotor shaft (2); An axial electromagnet (32) is fitted on the inner wall of the fixed cover (31) and coaxial with the rotor shaft (2), and the axial electromagnet (32) generates an axial compensation force in the axial direction of the rotor shaft (2) after being energized.

8. An energy efficient electric machine as recited in claim 7, wherein: A plurality of eddy current vanes (2211) are arranged in the inside of the fitting disc (221), a gas inlet (24) is formed on one end of the rotor shaft (2), a gas outlet (25) is formed on the other end, a fitting gap (26) is arranged between the fixed cover (31) and the other end of the rotor shaft (2), the fitting gap (26) is communicated with the gas outlet, and a plurality of exhaust holes (311) are arranged on the outside of the fixed cover (31) along the circumference thereof.

9. An energy efficient electric motor as claimed in claim 1, wherein: The inner wall of the stator shell (1) is provided with stator magnetic steel (12), the outer part of the rotor rotating shaft (2) is coaxially provided with rotor magnetic steel (27), the stator magnetic steel (12) and the rotor magnetic steel (27) generate electromagnetic torque after being electrified, so as to drive the rotation of the rotor rotating shaft (2).

10. An energy saving motor drive apparatus, characterized by: An energy saving motor comprising a motor as claimed in any one of claims 1 to 9.

Images