Energy-saving motor and driving device

Abstract

The application relates to an energy-saving motor and a driving device, which comprises a stator shell externally provided with a control unit and a rotor rotating shaft, the stator shell is provided with a piezoelectric induction frame at one end, a bearing is coaxially arranged in the piezoelectric induction frame, the rotor rotating shaft is arranged in the stator shell, one end of the rotor rotating shaft penetrates through the piezoelectric induction frame and extends to the outside of the stator shell, the rotor rotating shaft is rotationally connected with the piezoelectric induction frame through the bearing, a radial compensation device is coaxially arranged on the outside of the stator shell, the radial compensation device is coaxially arranged on the outside of one end of the rotor rotating shaft, a radial induction device is coaxially arranged on the outside of one end of the rotor rotating shaft, the piezoelectric induction frame is configured to sense the radial resistance received by the rotor rotating shaft and drive the radial compensation device to exert a radial compensation force on the radial induction device, which is opposite to the radial resistance, so as to balance the rotor rotating shaft. The force of the rotor rotating shaft in the radial direction is balanced, thereby reducing the resistance generated by the bearing on the rotor rotating shaft, and a certain energy-saving effect can be achieved.

Description

Technical Field

[0001] This application relates to the field of energy-saving motor technology, and in particular to an energy-saving motor and drive device. Background Technology

[0002] An electric motor is a device that converts electrical energy into mechanical energy. Its main components are the stator and the rotor. The stator is the stationary part of the motor, which mainly includes the stator core and the excitation winding. The rotor is the rotating part of the motor, which mainly includes the rotor core, the armature winding and the commutator. Its working principle is based on the laws of electromagnetic induction and electromagnetic force. When the excitation winding is energized, electromagnetic torque is generated to drive the rotor to rotate.

[0003] The prior art discloses a reluctance motor, including claw pole components and squirrel cage bars. The claw pole components generate a stator rotating magnetic field, and the squirrel cage bars cut the magnetic lines of force of the stator rotating magnetic field to generate asynchronous starting torque and pull the rotor components of the motor into synchronous speed, thereby enabling the motor to start asynchronously.

[0004] However, in the aforementioned and existing motors, when the drive shaft is connected to a load such as a pulley, the load will exert radial pressure on the drive shaft, thereby increasing the frictional resistance between the drive shaft and the motor bearings. The drive shaft needs to do extra work to overcome this resistance when rotating, which in turn increases the energy consumption of the motor. Summary of the Invention

[0005] This application provides an energy-saving motor and drive device that can solve the problem that existing motors, when operating, generate additional resistance due to the radial pressure on the drive shaft, thereby increasing the motor's energy consumption.

[0006] The technical solution of this application is as follows: An energy-saving motor, comprising: The stator housing is equipped with a control unit on the outside. One end of the stator housing is equipped with a piezoelectric induction frame, and a bearing is coaxially arranged inside the piezoelectric induction frame. A hollow rotor shaft is disposed inside the stator housing. One end of the rotor shaft passes through the piezoelectric induction frame and extends to the outside of the stator housing. The rotor shaft and the piezoelectric induction frame are rotatably connected by bearings. A radial compensation device is coaxially disposed outside the stator housing. The radial compensation device is coaxially disposed outside one end of the rotor shaft. A radial sensing device is coaxially disposed outside one end of the rotor shaft. The piezoelectric induction frame is configured to sense the radial resistance experienced by the rotor shaft and generate a sensing signal. The control unit is used to receive the sensing signal and drive the radial compensation device to apply a radial compensation force opposite to the radial resistance to the radial sensing device to balance the rotor shaft. As the radial sensing device rotates with the rotor shaft, it guides airflow into the interior of the rotor shaft to cool the bearing.

[0007] By adopting the above scheme, by setting a radial compensation device outside the stator housing and setting a radial sensing device on the rotor shaft that can sense the radial compensation device, when the load applies radial pressure to the rotor shaft, the radial compensation device can provide a radial compensation force opposite to the radial pressure to the rotor shaft, so that the force of the rotor shaft in the radial direction can be balanced to a certain extent, thereby reducing the resistance generated by the bearing on the rotor shaft, reducing the work that the motor needs to do to overcome the resistance, and achieving a certain energy-saving effect. In addition, since the radial sensing device is mounted on the rotor shaft, it can drive external airflow into the rotor shaft when rotating, thereby removing some of the heat accumulated in the bearings, reducing bearing wear and loss, and also reducing heat accumulation in the entire motor, thus reducing the increase in motor power consumption caused by heat accumulation.

[0008] In one embodiment of this application, the stator housing is provided with the piezoelectric sensing frame at the other end. One end of the piezoelectric sensing frame is provided with an opening, and the other end is provided with a circular through hole for the rotor shaft to pass through. The openings of the two piezoelectric sensing frames located at both ends of the stator housing are opposite to each other. An axial compensation device is provided at the other end of the stator housing. The other end of the rotor shaft passes through the piezoelectric sensing frame and extends into the interior of the axial compensation device. An axial sensing device is coaxially provided at the other end of the rotor shaft. The two piezoelectric induction frames are configured to sense the axial resistance on the rotor shaft and drive the axial compensation device to apply an axial compensation force opposite to the axial resistance to the axial sensing device to balance the rotor shaft.

[0009] By adopting the above technical solution, a piezoelectric induction frame connected to the bearing is set outside the bearing. The piezoelectric induction frame senses the interaction force between itself and the bearing in real time, thereby sensing the external radial pressure on the rotor shaft. The radial compensation device generates a radial compensation force to balance the radial pressure on the rotor shaft. In addition, by installing piezoelectric induction frames at both ends of the stator housing, the two piezoelectric induction frames can sense the axial pressure on the rotor shaft in two directions, and control the axial compensation device to apply a reverse axial compensation force to the rotor shaft, thereby balancing the axial pressure on the rotor shaft to a certain extent.

[0010] In one embodiment of this application, the inner wall of the side of the piezoelectric induction frame is provided with a plurality of first strip grooves arranged in a circular array. A first piezoelectric induction component is provided inside the first strip groove. The first piezoelectric induction component is connected and fixed to the outer ring of the bearing. The rotor shaft is connected and fixed to 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 grooves arranged in a circular array outside the circular through hole. A second piezoelectric induction component is provided inside the second strip groove. The second piezoelectric induction component is connected and fixed to the outer ring of the bearing.

[0011] By adopting the above scheme, multiple circumferentially arranged first strip grooves are set on the side wall of the piezoelectric sensing frame, and the first piezoelectric sensing component set inside the first strip groove senses the radial pressure on the piezoelectric sensing frame by the bearing. At the same time, multiple second strip grooves arranged in a circular array are set on the bottom inner wall of the piezoelectric sensing frame, and the two piezoelectric sensing frames are respectively set at both ends of the rotor shaft. This allows the pressure on the rotor shaft in the axial direction to be sensed. The first and second piezoelectric sensing components arranged in a circular array can accurately detect the direction and magnitude of the pressure on the rotor shaft in the axial and radial directions, which facilitates the subsequent balancing of the pressure on the rotor shaft in the axial and radial directions.

[0012] In one embodiment of this application, both the first piezoelectric sensing component and the second piezoelectric sensing component include: A piezoelectric sensing element, wherein multiple piezoelectric sensing elements are provided, and the multiple piezoelectric sensing elements are respectively disposed in the first strip groove and the second strip groove in a one-to-one correspondence; The pressure block is provided in multiple ways. One side of each pressure block is respectively disposed in the first strip groove and the second strip groove, and the other side of the pressure block is connected and fixed to the outer ring of the bearing.

[0013] By adopting the above scheme, when the rotor shaft is subjected to radial pressure, the radial pressure squeezes the bearing through the rotor shaft, and the bearing squeezes the pressure block set on the inner side wall of the piezoelectric induction frame. The pressure block can squeeze the piezoelectric induction sheet. After the piezoelectric induction sheet is squeezed, it is converted into an electrical signal and transmitted to the control unit to control the radial sensing device to balance the radial pressure. When the rotor shaft is subjected to axial pressure, the axial pressure is squeezed through the rotor shaft to the bearing end, and the bearing end squeezes the pressure block set on the inner wall of the bottom of the piezoelectric induction frame. The pressure block can squeeze the piezoelectric induction plate. After the piezoelectric induction plate is squeezed, it is converted into an electrical signal and transmitted to the control unit to control the axial sensing device to balance the axial pressure.

[0014] In one embodiment of this application, the radial compensation device includes: An annular mounting base is fixedly assembled to the outside of one end of the stator housing and is coaxial with the rotor shaft. A circular through hole is provided inside the mounting base. The diameter of the circular through hole is larger than the diameter of the rotor shaft. One end of the rotor shaft passes through the circular through hole. The electromagnetic blocks are arranged in multiples, and are arranged in a circular array outside the circular through hole. The radial sensing device is arranged concentrically with the circle containing the electromagnetic blocks. When the electromagnetic blocks are energized, they generate a radial compensation force in the radial direction of the rotor shaft on the radial sensing device.

[0015] By adopting the above scheme, after the voltage sensing element senses the radial pressure, the electromagnetic block is energized and generates a corresponding electromagnetic force. The resultant force of the electromagnetic forces generated by the electromagnetic blocks in a circular array is used to balance the radial pressure on the rotor shaft to a certain extent. This reduces the squeezing force on the bearing even if the rotor shaft is subjected to radial pressure, thereby reducing the work done by the motor to overcome the force and reducing energy consumption.

[0016] In one embodiment of this application, the radial sensing device includes: An assembly disc is coaxially mounted to the outside of the other end of the rotor shaft; A magnetic ring is coaxially mounted on the outside of the assembly disk and is located on the same vertical plane as the electromagnetic block.

[0017] By adopting the above technical solution, the electromagnetic force generated by the electromagnetic block after being energized acts on the magnetic ring, and the magnetic ring is set on the rotor shaft, thereby enabling the electromagnetic block to exert a repulsive force on the rotor shaft, which balances the radial pressure on the rotor shaft to a certain extent.

[0018] In one embodiment of this application, the axial compensation device includes: A fixed cover is fitted to the other end of the stator housing, and the other end of the rotor shaft protrudes from the stator housing. A columnar magnetic block is coaxially fitted to the end face of the other end of the rotor shaft. An axial electromagnet is mounted on the inner wall of the fixed cover and is coaxial with the rotor shaft. When the axial electromagnet is energized, it generates an axial compensating force on the columnar magnetic block in the direction of the rotor shaft axis.

[0019] By adopting the above technical solution, when the rotor shaft is subjected to axial force, the axial electromagnet is energized, which in turn generates an axial magnetic force on the columnar magnetic block. According to the direction of the axial resistance induced on the rotor shaft, the direction of the current flowing through the axial electromagnet is controlled, thereby controlling the direction of the magnetic force generated by the axial electromagnet, so as to generate a repulsive or attractive force on the columnar magnetic block and balance the axial resistance on the rotor shaft to a certain extent.

[0020] In one embodiment of this application, the assembly disc is provided with a plurality of vortex fan blades, one end of the rotor shaft is provided with an air inlet and the other end is provided with an air outlet, an assembly gap is provided between the fixed cover and the other end of the rotor shaft, the assembly gap is connected to the air outlet, and a plurality of exhaust holes are provided on the outside of the fixed cover along its circumference.

[0021] By adopting the above scheme, when the rotor shaft rotates, the rotor shaft drives the assembly disc to rotate. When the assembly disc rotates, it can drive the vortex fan blades to rotate, thereby guiding the airflow into the air inlet of the rotor shaft. When the airflow enters the air inlet, it can also carry away some of the heat generated by the bearing. After entering the air inlet, the airflow passes through the hollow rotor shaft and flows out from the air outlet, carrying away some of the heat accumulated inside the motor and reducing the heat accumulation in the motor.

[0022] In one embodiment of this application, a stator magnet is provided on the inner wall of the stator housing, and a rotor magnet is coaxially provided on the outside of the rotor shaft. When the stator magnet and the rotor magnet are energized, they generate electromagnetic torque to drive the rotor shaft to rotate.

[0023] By adopting the above technical solution, stator magnets are installed in the stator housing and rotor magnets are installed outside the rotor shaft. When energized, the two generate relative electromagnetic torque, thereby driving the rotor shaft to rotate.

[0024] The second objective of this invention is to provide an energy-saving motor drive device.

[0025] To achieve the above objectives, the technical solution of this application is as follows: an energy-saving motor drive device, comprising an energy-saving motor.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. By installing a piezoelectric induction frame at the bearing between the stator housing and the rotor shaft, the radial pressure on the rotor shaft is sensed by the piezoelectric induction frame. Electromagnetic blocks arranged in a circular array are also installed, along with a magnetic ring on the rotor shaft that can sense the magnetic force of the electromagnetic blocks. The multiple electromagnetic blocks generate a repulsive force on the magnetic ring that is opposite in direction and equal in magnitude to the radial pressure. This can balance the radial pressure on the rotor shaft to a certain extent, so that even when the bearing is subjected to radial pressure, the extra work done by the motor can be reduced, saving energy and reducing wear on the bearing.

[0027] 2. By setting two piezoelectric induction frames and setting a second piezoelectric induction component on the inner wall of the bottom end of the piezoelectric induction frame, the two piezoelectric induction frames can respectively sense the two opposite axial resistances on the rotor shaft. By controlling the direction of the current flowing through the axial electromagnet, the direction of the magnetic force generated by the axial electromagnet on the columnar magnetic block can be controlled. Then, according to the direction of the axial resistance on the rotor shaft, the rotor shaft can be axially balanced.

[0028] 3. By setting an internally hollow rotor shaft and connecting it to the outside, and by opening vortex fan blades on the assembly disc, the assembly disc can draw external airflow into the rotor shaft when the rotor shaft rotates, thereby removing the heat accumulated in the bearings and inside the motor and improving the motor's heat dissipation capacity. Attached Figure Description

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

[0030] Explanation of reference numerals in the attached drawings: 1. Stator housing; 11. Piezoelectric induction frame; 111. Opening; 112. Circular through hole; 113. First strip groove; 114. First piezoelectric induction assembly; 115. Second strip groove; 116. Second piezoelectric induction assembly; 117. Piezoelectric induction sheet; 118. Pressure block; 12. Stator magnet; 13. Bearing; 2. Rotor shaft; 21. Radial compensation device; 211. Fixing base; 2111. Circular through hole; 212. Electromagnetic block; 22. Radial induction device; 221. Assembly disk; 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 magnet; 3. Axial compensation device; 31. Fixing cover; 311. Exhaust port; 32. Axial electromagnet; 4. Control unit. Detailed Implementation

[0031] The following is in conjunction with the appendix Figures 1-7 This application provides a further detailed description of an energy-saving motor and drive device.

[0032] An energy-saving motor provided in this application embodiment includes: a stator housing 1 and a rotor shaft 2.

[0033] Please see Figure 1 and Figure 2 The stator housing 1 has a piezoelectric induction frame 11 at one end, and a bearing 13 is coaxially arranged inside the piezoelectric induction frame 11. The rotor shaft 2 is located inside the stator housing 1, with one end of the rotor shaft 2 passing through the piezoelectric induction frame 11 and extending to the outside of the stator housing 1. The rotor shaft 2 and the piezoelectric induction frame 11 are rotatably connected via the bearing 13. A radial compensation device 21 is coaxially arranged outside the stator housing 1, and the radial compensation device 21 is coaxially arranged outside one end of the rotor shaft 2. An external coaxial radial sensing device 22 is provided. The piezoelectric sensing frame 11 is configured to sense the radial resistance received by the rotor shaft 2 and drive the radial compensation device 21 to apply a radial compensation force opposite to the radial resistance to the radial sensing device 22 in order to balance the rotor shaft 2. By setting the radial compensation device 21 and setting a radial compensation force on the rotor shaft 2 that can sense the radial compensation device 21, the radial compensation device 21 applies a reverse radial compensation force to the rotor shaft 2, thereby balancing the radial resistance received by the rotor shaft 2 to a certain extent. When the radial sensing device 22 rotates with the rotor shaft 2, it guides the airflow into the rotor shaft 2 to cool the bearing 13. When the radial sensing device 22 rotates, it can drive the external airflow into the rotor shaft 2, thereby removing some of the heat accumulated in the bearing 13, reducing the wear and loss of the bearing 13, and reducing the heat accumulation in the motor.

[0034] Please continue reading. Figure 1 In this embodiment, a control unit 4 is also provided outside the stator housing 1. The control unit 4 has a built-in microcontroller and a power supply module. The radial sensing device 22 and the axial sensing device 23 are electrically connected to the control unit 4, so that after sensing the radial resistance and axial resistance of the rotor shaft 2, the control unit 4 can control the radial compensation device 21 and the axial compensation device 3 to generate corresponding electromagnetic forces on the rotor shaft 2 to balance the radial resistance and axial resistance of the rotor shaft 2. The program written inside the microcontroller and the electrical connection method between the control unit 4 and the radial compensation device 21 and the axial compensation device 3 can be implemented by those skilled in the art without the aid of external technology. In one embodiment of this application, the control unit 4 can receive voltage signals V1, V2...VN from N first piezoelectric sensing components 114, calculate the magnitude F and angle θ of the resultant force through a preset algorithm (e.g., vector superposition algorithm or lookup table method), and then the control unit 4 adjusts the current applied to the electromagnetic block 212 at the corresponding position according to F and θ through a PID controller to generate radial compensation forces of opposite direction and equal magnitude.

[0035] Please see Figure 2 and Figure 5 The stator housing 1 has a piezoelectric induction frame 11 at one end. One end of the piezoelectric induction frame 11 has an opening 111, and the other end has a circular through hole 112 for the rotor shaft 2 to pass through. The openings 111 of the two piezoelectric induction frames 11 at both ends of the stator housing 1 face each other. An axial compensation device 3 is provided at the other end of the stator housing 1. The other end of the rotor shaft 2 passes through the piezoelectric induction frame 11 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 piezoelectric sensing frame 11 is 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, so as to balance the rotor shaft 2. By setting piezoelectric sensing frames 11 at both ends of the stator housing 1, the two piezoelectric sensing frames 11 are used to sense the axial pressure in two directions on the rotor shaft 2, and the axial compensation device 3 is controlled to apply an axial compensation force in the opposite direction to the rotor shaft 2, so as to balance the axial pressure on the rotor shaft 2 to a certain extent.

[0036] In this embodiment, the control unit 4 can receive voltage signals V1, V2...VN from N second piezoelectric sensing components 116, calculate the magnitude F of the resultant force through a preset algorithm (e.g., vector superposition algorithm or lookup table method), and then, according to F, the control unit 4 adjusts the current applied to the axial electromagnet 32 ​​through a PID controller to generate axial compensation forces of opposite direction and equal magnitude.

[0037] Please see Figure 4 , Figure 5 and Figure 6 The piezoelectric sensing frame 11 has multiple first strip grooves 113 arranged in a circular array on its inner side wall. A first piezoelectric sensing component 114 is housed inside each first strip groove 113. 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 bottom inner wall of the piezoelectric sensing frame 11 has multiple second strip grooves 115 arranged in a circular array outside the circular through hole 112. A second piezoelectric sensing component 116 is housed inside each second strip groove 115. The second piezoelectric sensing component 116 is connected and fixed to the outer ring of the bearing 13. By providing multiple first piezoelectric sensing components 114 and second piezoelectric sensing components 116 arranged in a circular array on the side and bottom walls of the piezoelectric sensing frame 11, the pressure direction and magnitude of the rotor shaft 2 in the axial and radial directions can be accurately detected, facilitating subsequent balancing of the aforementioned resistance.

[0038] Please refer to Figure 2 and Figure 5 The first piezoelectric sensing component 114 and the second piezoelectric sensing component 116 both include: piezoelectric sensing plates 117 and pressure blocks 118. Multiple piezoelectric sensing plates 117 are provided, and each of the multiple piezoelectric sensing plates 117 is respectively disposed in the first strip groove 113 and the second strip groove 115. Multiple pressure blocks 118 are provided, and one side of each of the multiple pressure blocks 118 is respectively disposed in the first strip groove 113 and the second strip groove 115. The other side of the pressure block 118 is connected and fixed to the outer ring of the bearing 13. When the rotor shaft 2 is subjected to radial pressure and axial force, the piezoelectric sensing plates 117 located in the first strip groove 113 and the second strip groove 115 can sense the above two forces respectively, and control the radial compensation device 21 and the axial compensation device 3 to balance, thereby reducing the resistance that the motor needs to overcome when rotating.

[0039] In this embodiment, the piezoelectric sensing element 117 can be a ceramic piezoelectric sensing element 117.

[0040] Please see Figure 3The radial compensation device 21 includes an annular fixed base 211 and an electromagnetic block 212. The fixed base 211 is fixedly mounted on the outside of one end of the stator housing 1 and is coaxial with the rotor shaft 2. A circular through hole 2111 is provided inside the fixed 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 passes through the circular through hole 2111. Multiple electromagnetic blocks 212 are provided. Multiple electromagnetic blocks 212 are provided inside the fixed base 211 and are arranged in a circular array at intervals outside the circular through hole 2111. The radial sensing device 22 is concentrically arranged with the circle containing the multiple electromagnetic blocks 212. When the multiple electromagnetic blocks 212 are energized, they generate a radial compensation force in the radial direction of the rotor shaft 2 on the radial sensing device 22. By utilizing the resultant force of the electromagnetic force generated by the circular array of electromagnetic blocks 212, the radial resistance on the rotor shaft 2 can be accurately balanced.

[0041] In this embodiment, the number and placement position of the first strip groove 113 and the second strip groove 115 are the same, and the number and placement position of the first strip groove 113 correspond to the number and placement position of the electromagnetic block 212. The number of the first strip groove 113 and the electromagnetic block 212 can be three. Correspondingly, the multiple first strip grooves 113 are arranged at 120° to each other, and the electromagnetic blocks 212 are also arranged at 120° to each other.

[0042] Please see Figure 7 The radial sensing device 22 includes an assembly disk 221 and a magnetic ring 222. The assembly disk 221 is coaxially mounted on the outside of the other end of the rotor shaft 2. The magnetic ring 222 is coaxially mounted on the outside of the assembly disk 221 and is located on the same vertical plane as the electromagnetic block 212. By setting the electromagnetic block 212 and the magnetic ring 222 on the rotor shaft 2, the electromagnetic block 212 can balance the radial pressure on the rotor shaft 2 to a certain extent.

[0043] In this embodiment, the assembly disk 221 can be made of aluminum alloy or titanium alloy.

[0044] Please see Figure 2The axial compensation device 3 includes a fixed cover 31 and an axial electromagnet 32. The fixed cover 31 is mounted on the other end of the stator housing 1, and the other end of the rotor shaft 2 protrudes from the stator housing 1. A columnar magnetic block 231 is coaxially mounted on the end face of the other end of the rotor shaft 2. The axial electromagnet 32 ​​is mounted on the inner wall of the fixed cover 31 and is coaxial with the rotor shaft 2. When the axial electromagnet 32 ​​is energized, it generates an axial compensation force in the direction of the rotor shaft 2 axis on the columnar magnetic block 231. By energizing the electromagnet, an axial magnetic force can be generated on the columnar magnetic block 231. Based on the direction of the axial resistance induced on the rotor shaft 2, the direction of the magnetic force generated by the axial electromagnet 32 ​​is controlled to balance the axial resistance on the rotor shaft 2 to a certain extent, thereby further reducing mechanical losses.

[0045] Please see Figure 7 The assembly disc 221 is provided with multiple vortex fan blades 2211 inside. One end of the rotor shaft 2 has an air inlet 24 and the other end has an air outlet 25. The fixed cover 31 and the other end of the rotor shaft 2 are provided with an assembly gap 26, which is connected to the air outlet. The fixed cover 31 is provided with multiple exhaust holes 311 along its circumference. By setting the assembly disc 221 on the rotor shaft 2, the rotation of the rotor shaft 2 drives the assembly disc 221 to rotate, thereby guiding the airflow into the air inlet 24 of the rotor shaft 2, carrying away some of the heat accumulated in the bearing 13 and inside the motor, reducing the heat loss of the bearing 13, and improving the heat dissipation capacity of the motor.

[0046] Please see Figure 2 The stator housing 1 has a stator magnet 12 on its inner wall and a rotor magnet 27 coaxially arranged on the outside of the rotor shaft 2. When the stator magnet 12 and the rotor magnet 27 are energized, they generate electromagnetic torque to drive the rotor shaft 2 to rotate. By setting the stator magnet 12 in the stator housing 1 and the rotor magnet 27 on the outside of the rotor shaft 2, when energized, they generate relative electromagnetic torque, thereby driving the rotor shaft 2 to rotate.

[0047] The second objective of this invention is to provide an energy-saving motor drive device.

[0048] To achieve the above objectives, the technical solution of this application is as follows: an energy-saving motor drive device, comprising an energy-saving motor.

[0049] In summary, when the rotor shaft 2 of the motor is subjected to radial pressure, the rotor shaft 2 applies radial pressure to the bearing 13. The bearing 13 transmits the radial pressure to the pressure block 118 located on the side wall of the piezoelectric induction frame 11. The pressure block 118 squeezes the piezoelectric induction plate 117, thereby converting the mechanical pressure into an electrical signal, which in turn controls the electromagnetic block 212 to be energized and generates a corresponding magnetic force. The magnetic force repels the magnetic force of the magnetic ring 222. The resultant force of the repulsive force of multiple electromagnetic blocks 212 acts on the rotor shaft 2, which can balance the radial pressure on 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. When the rotor shaft 2 of the motor is subjected to an axial force, the rotor shaft 2 drives the bearing 13 to press the piezoelectric induction plate 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 ​​located inside the fixed cover 31 is energized and generates a corresponding axial magnetic force. According to the direction and magnitude of the axial force on the rotor shaft 2, the direction and magnitude of the current flowing into the electromagnet are controlled, so that the axial electromagnet 32 ​​attracts or repels the columnar magnetic block 231 to balance the axial force on the rotor shaft 2, further reducing the wear of the bearing 13 and reducing the energy consumption of the motor.

[0050] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An energy-saving motor, characterized in that, 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); 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). 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).

2. The energy-saving motor according to claim 1, characterized in that, Both the first piezoelectric sensing component (114) and the second piezoelectric sensing component (116) include: A piezoelectric sensing sheet (117) is provided in multiple ways, and the multiple piezoelectric sensing sheets (117) are respectively disposed in the first strip groove (113) and the second strip groove (115). A pressure block (118) is provided in multiple ways. One side of each pressure block (118) is respectively disposed in the first strip groove (113) and the second strip groove (115). The other side of the pressure block (118) is connected and fixed to the outer ring of the bearing (13).

3. The energy-saving motor according to claim 2, characterized in that: The radial compensation device (21) includes: An annular fixing seat (211) is fixedly assembled to the outside of one end of the stator housing (1) and coaxial with the rotor shaft (2). A circular through hole (2111) is provided inside the fixing seat (2111). 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) passes through the circular through hole (2111). Electromagnetic blocks (212) are provided in multiples. Multiple electromagnetic blocks (212) are provided inside the fixed base (211) and arranged in a circular array at intervals outside the circular through hole (2111). The radial sensing device (22) is arranged concentrically with the circle containing multiple electromagnetic blocks (212). When multiple electromagnetic blocks (212) are energized, they generate a radial compensation force in the radial direction of the rotor shaft (2) on the radial sensing device (22).

4. An energy-saving motor according to claim 3, characterized in that: The radial sensing device (22) includes: An assembly disc (221) is coaxially mounted to the outside of the other end of the rotor shaft (2); A magnetic ring (222) is coaxially mounted on the outside of the assembly disk (221) and is located on the same vertical plane as the electromagnetic block (212).

5. An energy-saving motor according to claim 4, characterized in that: The axial compensation device (3) includes: A fixed cover (31) is mounted on the other end of the stator housing (1), and the other end of the rotor shaft (2) protrudes from the stator housing (1). A columnar magnetic block (231) is coaxially mounted on the end face of the other end of the rotor shaft (2). An axial electromagnet (32) is mounted on the inner wall of the fixed cover (31) and is coaxial with the rotor shaft (2). When the axial electromagnet (32) is energized, it generates an axial compensating force on the columnar magnetic block (231) in the direction of the rotor shaft (2).

6. An energy-saving motor according to claim 5, characterized in that: The assembly disc (221) is provided with multiple vortex fan blades (2211). One end of the rotor shaft (2) is provided with an air inlet (24) and the other end is 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 connected to the air outlet. The fixed cover (31) is provided with multiple exhaust holes (311) along its circumference.

7. An energy-saving motor according to claim 1, characterized in that: The stator housing (1) has a stator magnet (12) on its inner wall and a rotor magnet (27) is coaxially arranged on the outside of the rotor shaft (2). When the stator magnet (12) and the rotor magnet (27) are energized, they generate electromagnetic torque to drive the rotor shaft (2) to rotate.

8. An energy-saving motor drive device, characterized in that: Including an energy-saving motor as described in any one of claims 1-7.

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