24 results about "Magnetic gear" patented technology

This invention discloses a monotonic magnetic ring dual-rotor radial-axis composite modulation magnetic gear. The magnetic gear includes an inner rotor yoke, an inner rotor permanent magnet, a tuning ring, an outer rotor permanent magnet, and an outer rotor yoke. The inner rotor yoke and the inner rotor permanent magnet constitute the inner rotor, and the outer rotor permanent magnet and the outer rotor yoke constitute the outer rotor. The inner and outer rotors are coaxially arranged to form a dual-rotor structure, capable of relative rotation. The tuning ring, a single tuning structure, is positioned between the inner and outer rotors to simultaneously achieve radial modulation and axial differential modulation, thus forming a radial-axis dual-modulation magnetic gear. Both the inner and outer rotor permanent magnets employ an asymmetric Halbach array structure. This application achieves radial modulation and differential modulation, constructing a radial-axis coupled dual-modulation magnetic field structure, improving magnetic field utilization and torque transmission capability.

This invention discloses a general construction method for a bearingless magnetic gear double-sided motor with global fundamental harmonic cancellation. The method consists of three levels: preliminary optimization, constraint 1 for the cancellation of armature magnetic field harmonics and permanent magnet harmonics before modulation, and constraint 2 for the cancellation of armature magnetic field harmonics and permanent magnet harmonics after modulation. Preliminary optimization can only reduce the pulsation generated by the fundamental wave of the levitation magnetic field and the stationary wave of the permanent magnet. Based on this, constraint 1 is proposed to reduce the levitation force pulsation generated by the armature magnetic field harmonics and permanent magnet harmonics before modulation, and constraint 2 is proposed to reduce the levitation force pulsation generated by the armature magnetic field harmonics and permanent magnet harmonics after modulation. Through the principle of global fundamental harmonic cancellation, this invention effectively reduces the levitation force pulsation of the bearingless magnetic gear double-sided motor, overcoming the shortcomings of traditional and existing levitation motor construction methods.

This utility model discloses a magnetic gear pump motor without an internal rotor, specifically relating to the field of motor technology. It includes a rotor body with a gear pump connection hole on the front side, which penetrates the rotor body. A drive disc is detachably snap-fitted onto the rear side of the rotor body. A motor rear cover is fitted behind the rotor body, with a mounting hole on one side. A waterproof connector is snap-fitted into the mounting hole. This utility model employs a rotorless design, significantly reducing motor weight and volume, resulting in a compact structure and convenient installation and use. This design also eliminates iron loss, improving motor efficiency and reducing energy consumption. Its novel ironless winding, specially braided and fixed, exhibits excellent strength and stability, directly fixed to the inner wall of the outer casing, reducing intermediate losses and improving magnetic field conduction efficiency, thus enhancing motor performance.

The present application relates to the technical field of biological detection pretreatment device, and more particularly to a red blood cell folate pretreatment detection device, which comprises a magnetic stand, a reaction tube is placed on the magnetic stand, and a multi-gear magnetic separation mechanism for providing different magnetic field strengths in the magnetic adsorption stage, the washing stage and the resuspension stage is arranged on the magnetic stand, and the multi-gear magnetic separation mechanism comprises a lifting flat plate movably arranged in the magnetic stand. The lifting flat plate drives the cylindrical permanent magnet to approach or move away from the bottom of the reaction tube, and the three groups of rotating clamping blocks are matched to realize quick switching of gears. The strong magnetic gear makes the permanent magnet closely adhere to the bottom of the tube, and can quickly capture magnetic particles. The weak magnetic gear makes the permanent magnet maintain a proper distance, which can not only maintain adsorption but also avoid the agglomeration of magnetic beads. The zero magnetic gear makes the magnetic field basically disappear, which is convenient for resuspension. The three gears correspond to the core steps of pretreatment respectively, and the whole process is completed by one machine, so that the sample does not need to be transferred between different devices, and the detection efficiency and repeatability are effectively improved.

The mechanism includes a magnetic gear (2), which comprises a first gear (6A), a second gear (6B), and a third gear (6C). The first gear is provided with permanent magnet poles (7) arranged to form magnetized teeth of a first magnetic gear system (8). The second and third gears are provided with teeth made of soft ferromagnetic material that define a second magnetic gear system (10) and a third magnetic gear system (12), respectively. The second magnetic gear system (10) and the third magnetic gear system (12) each have a greater number of teeth than the first magnetic gear system (8) and are magnetically coupled to the first magnetic gear system. With the magnetic flux provided by the magnetized teeth of the first gear system and because the teeth of the second magnetic gear system are magnetically separated from each other, the second magnetic gear system (10) is directly coupled to the first magnetic gear system on the one hand and directly coupled to the third magnetic gear system on the other hand.

The present application belongs to the technical field of magnetic transmission and electromagnetic field numerical calculation, and relates to a dynamic magnetic circuit calculation method for transient electromagnetic torque of a radial magnetic gear. The steps are as follows: first, a two-dimensional grid model of the radial magnetic gear is established and physical material properties are assigned; second, grid element branch permeances are calculated and a global permeance sparse matrix is assembled; third, rotor positions are determined based on kinematic equations and equivalent magnetic flux source vectors are reconstructed; fourth, air gap magnetic flux density is solved and electromagnetic torque is calculated based on Maxwell stress tensor method. The dynamic magnetic circuit calculation method exhibits the characteristics of simplicity and convenience in practical engineering applications, and has excellent parameterization expandability and universality, and can flexibly adapt to performance evaluation of radial magnetic gears with different pole pair numbers and different topological sizes, providing a high-precision calculation tool with strong engineering universality for multi-objective optimization and parameter rapid iteration of magnetic gear transmission systems.

This invention provides a dual-rotor magnetic gear drive device and drive control method, comprising: a dual-rotor magnetic gear motor, a power drive controller, and a motor base; the power drive controller is fixedly mounted on the motor base and coaxially integrated with the dual-rotor magnetic gear motor; the dual-rotor magnetic gear motor includes, from the outside to the inside, an outer rotor, a stator, and an inner rotor coaxially arranged along the motor's central axis, with the outer rotor rotating in the opposite direction to the inner rotor; the outer rotor includes an outer rotor housing and an outer rotor permanent magnet disposed on the inner wall of the outer rotor housing; the inner rotor includes an inner rotating shaft and an inner rotor permanent magnet disposed on the outer surface of the inner rotating shaft; the stator includes a stator core, winding bushings, and a three-phase armature winding disposed within the stator core, with the winding bushings disposed in stator slots of the stator core; the stator core is provided with multiple stator modulation teeth. The dual-rotor magnetic gear drive device improves the system's transmission accuracy and long-term operational reliability.

A magnetic geared rotating machine includes: a stator; a rotor including a plurality of rotor magnets; and a magnetic pole piece rotor including a plurality of magnetic pole pieces each disposed at a radial position between the stator and the rotor. Each of the magnetic pole pieces has a magnetic pole piece end face facing one side in an axial direction. Each of the rotor magnets has a rotor magnet end face facing the one side. At least part of the magnetic pole piece end face is located on the other side in the axial direction relative to the rotor magnet end face, or a finger end face, of each of a plurality of fingers, facing the one side is located on the other side relative to a tooth end face, of a tooth of the stator, facing the one side, the plurality of fingers being configured to hold therebetween a stator magnet disposed on the tooth from both sides in a circumferential direction.

This invention relates to the field of energy harvesting technology, specifically to a piezoelectric-electromagnetic hybrid energy harvester based on magnetic coupling dual-frequency upsampling. It includes a magnetically driven gear module, a modulated magnetic field module, a magnetically driven gear module, at least one electromagnetic energy harvester, and at least one piezoelectric energy harvester. Its core lies in achieving a first mechanical frequency upsampling through a non-contact magnetically coupled magnetic gear structure, followed by a second frequency upsampling by nonlinear magnetic excitation of a piezoelectric cantilever beam to generate high-frequency vibrations through the nonlinear magnetic force between the driving magnet and the responding magnet. This dual-frequency upsampling mechanism efficiently converts low-frequency environmental energy into high-frequency mechanical energy, simultaneously driving the coordinated operation of three generator mechanisms: rotating electromagnetic, moving-magnetic, and piezoelectric, thereby significantly improving energy conversion efficiency and output power.

This invention relates to a timekeeping mechanism equipped with a magnetic gear. The mechanism (1) includes a magnetic gear (2), which comprises a first wheel (6B) and a second wheel (6C) respectively provided with a first magnetic gear system (10) and a second magnetic gear system (12). The first and second magnetic gear systems are formed by first and second teeth made of soft ferromagnetic material, respectively; and the magnetic gear (2) also includes a third wheel (6A), which is arranged between the first and second wheels (6B, 6C) and is provided with a third magnetic gear system (8) formed by permanent magnet poles (especially bipolar magnets). Generally, the first wheel is the driving wheel, while the second wheel is driven to perform a function or transmit torque. The third intermediate wheel is preferably mounted so that it can rotate freely.

This invention provides a fan, comprising: a drive motor including a first output shaft; a magnetic gear including a driving rotor and a driven rotor, and an adjusting magnetic ring, wherein the driving rotor and the driven rotor are respectively located on opposite sides of the adjusting magnetic ring, and the driving rotor is mounted on the first output shaft, and the driven rotor can rotate under the action of the driving rotor; a first fan blade mounted on the first output shaft and capable of rotating under the action of the first output shaft; and a second fan blade connected to the driven rotor and capable of rotating with the driven rotor; the rotation center of the first output shaft and the rotation center of the driven rotor are parallel to each other. This type of fan, because it includes two fan blades with different rotation directions, can output a gentle, comfortable, and varied airflow pattern. Simultaneously, the interaction between the two fan blades can reduce noise. Furthermore, because this type of fan uses a magnetic gear, it also has advantages such as no mechanical friction, low vibration, low noise, and overload protection.

This invention relates to the field of electric motors, specifically to a magnetic gear and a composite motor. The magnetic gear includes an inner rotor, a magnetic adjusting ring, and an outer rotor coaxially arranged from the inside out. The outer rotor is provided with multiple outer permanent magnets, and the inner rotor is provided with multiple inner permanent magnets. The multiple inner permanent magnets are uniformly distributed along the circumference of the inner rotor and magnetized along the tangential direction of the inner rotor. Each inner permanent magnet includes a first outer end facing the outer edge of the inner rotor and a first inner end facing the center of the inner rotor. The projection of the inner permanent magnet in the axial direction of the inner rotor is stepped, and the tangential width of the first outer end is greater than the tangential width of the first inner end. This reduces torque fluctuations during magnetic gear rotation and shortens the time required to reach a stable rotational speed.

The application relates to the field of electric machines, in particular to a magnetic gear and an electric machine. The magnetic gear comprises an outer rotor provided with an axial through hole, and an outer permanent magnet is arranged in the circumferential direction of the outer rotor; an inner rotor is coaxially arranged in the through hole and is spaced apart from the outer rotor, an inner permanent magnet and a damping part are arranged on the inner rotor, the damping part is conductive and non-magnetic, and is located between the inner permanent magnet and the outer edge of the inner rotor; and a magnetism adjusting ring is coaxially arranged in the space and is spaced apart from the outer rotor and the inner rotor to form an air gap, so that the torque fluctuation during rotation of the magnetic gear is reduced, and the time required for reaching a stable rotating speed during rotation is shortened.

To provide a pole piece panel unit of which the vibration prevention function is improved, a pole piece rotor, and a magnetic gear electric machine.SOLUTION: A pole piece panel unit comprises: a first pole piece panel including a first circumferential end which is an end at one side in a circumferential direction; and a second pole piece panel including a second circumferential end which is an end at the other side in the circumferential direction, the second pole piece panel being adjacent to the first pole piece panel in the circumferential direction. The first circumferential end includes a first main body extending in an axial direction and a first protrusion protruding from the first main body to one side in the circumferential direction. The second circumferential end includes a second main body extending in the axial direction and a second protrusion protruding from the second main body to the other side in the circumferential direction and being disposed side by side with the first protrusion in a radial direction. The pole piece panel unit further comprises a fixture member including a shaft, which is inserted through a first insertion hole formed in the first protrusion and a second insertion hole formed in the second protrusion, and fixed to the first protrusion and the second protrusion.SELECTED DRAWING: Figure 3

This invention discloses a deadbeat predictive speed control method and system for an integrated magnetic field-modulated vernier motor, belonging to the field of motor control technology. Addressing the problems of weak observation capability for changing disturbances and poor system anti-interference performance of traditional extended state observers, this invention first establishes the discrete motion equations of the motor, treating the magnetic gear torque and parameter errors as the total disturbance, and expanding its first derivative to a new state, thus constructing a high-order extended state observer. Then, by establishing the discrete transfer functions of the observer and the system, an approximate order reduction method is used for pole placement and gain tuning, improving model accuracy and observation convergence speed. Finally, deadbeat predictive current control is combined to form a cascaded control structure. This invention significantly improves the system's ability to suppress low-frequency disturbances such as magnetic gear torque, achieves rapid and stable speed tracking, and enhances the motor's operating accuracy and robustness under high dynamic loads.

A magnetic gear device includes: a magnetic gear including an inner magnet tube, an outer magnet tube, and arranged pole pieces provided between the inner and outer magnet tubes, such that one of them is used as a first rotor connected to an input portion, another one is used as a second rotor connected to an output portion, and the remaining one is used as a stator; and a rotary electric machine including a rotor having permanent magnets and a stator having teeth. A first value based on a L.C.M. of a number of the pole pieces and a number of poles of the first or second rotors coincides with a L.C.M. of a number of poles of the rotor and a number of the teeth, and / or a value obtained by multiplying the number of poles of the rotor by a multiple of 3.

The utility model relates to magnetic gear composite motor assembly technical field, and disclose a kind of magnetic gear composite motor assembly workstation, including workstation body, the workstation body upper surface is fixedly connected with fixed platform, the fixed platform upper surface both sides position is fixedly connected with side plate, two the side plate opposite side between rotationally connected with bidirectional screw rod by bearing seat, two the bidirectional screw rod are fixedly connected with two carriages of symmetry by thread sleeve screw connection, the bottom of two the carriage is fixedly connected with the bracket of fixed motor. The utility model is in cooperation with the three-jaw chuck on the bracket and vertical board on the fixed platform, respectively fixed motor and the magnetic gear needed to be installed on the motor, realized the automation positioning and docking of motor and magnetic gear assembly process, eliminated the inevitable slight shaking and position deviation when manually holding.

This invention discloses a reliability test bench and method for a power servo tool turret simulating actual working conditions, belonging to the field of static and dynamic testing technology for machine tool components. It includes: a ground platform, a three-dimensional dynamic force loading device, a power servo tool turret system, a simulated loading axis, and a torque loading device. The simulated loading axis transmits torque to the torque loading device without contact via magnetic gears. The three-dimensional loading device applies dynamic force through a square groove on the outer shell of the simulated loading axis, simulating actual cutting loads. The test method achieves precise loading by equivalently decomposing the dynamic cutting force, generating random loads, and superimposing them, followed by servo closed-loop control, while simultaneously acquiring force, torque, and vibration signals. This device can reproduce multi-directional dynamic force and torque co-loading conditions, and the test method scientifically quantifies tool turret reliability, making it suitable for failure detection and performance evaluation of power servo tool turrets, providing data support for tool turret reliability optimization.

This invention provides a magnetic adjusting ring, a magnetic gear, a counter-rotating motor, and a fan. The magnetic adjusting ring is used in the motor of a fan and includes: a mounting member; and multiple magnetic adjusting teeth, spaced apart along a first circumferential direction and with magnetic isolation holes formed between adjacent magnetic adjusting teeth. The mounting member is located at one end of the multiple magnetic adjusting teeth along their length. In this type of magnetic adjusting ring, most of the area along the length of the multiple magnetic adjusting teeth is unconnected, thus creating relatively large magnetic isolation holes between the multiple magnetic adjusting teeth. This effectively prevents magnetic leakage and improves the magnetic moment transmission effect between the driven rotor and the driving rotor. Therefore, when the magnetic adjusting ring is used in a magnetic gear, it can improve the load capacity of the magnetic gear and reduce the risk of the magnetic gear losing synchronization.

The utility model relates to motor rotating speed detection technical field, and disclose a kind of rotating speed detection device of magnetic gear composite motor, including support frame, the support frame is ladder type, the upper surface of higher place of support frame is fixedly connected with base one, the sliding connection of base one has sliding table, the upper surface of sliding table is fixedly connected with the bearing frame for fixed magnetic gear composite motor, the upper surface of lower place of support frame is fixedly connected with bottom plate, the upper surface of bottom plate is fixedly connected with electric push rod, the top of electric push rod is fixedly connected with base two.The utility model separates motor installation area bearing frame and sensor installation area L type seat by ladder type support frame, significantly improves the compatibility of device to different models, size magnetic gear composite motor, without changing tooling can quickly, accurately complete sensor and measured point alignment, effectively improve detection efficiency and application range.

This invention provides a highly corrosion-resistant magnetic gear pump, comprising a pump body, a magnetic coupling, and a cavity. One end of the magnetic coupling is connected to the pump body. The cavity is located at the front end of the pump body, and a gear chamber is formed in the middle of the cavity. A meshing driving gear and a driven gear are installed within the gear chamber. The driving gear includes a main shaft and a main gear mounted on the main shaft. The driven gear includes a driven shaft and a driven gear mounted on the driven shaft. Both the main gear and the driven gear are helical gears. One end of the main shaft of the driving gear is connected to the magnetic coupling. Both the driving gear and the driven gear are made of Teflon material. By using Teflon material for the driving gear, driven gear, pump body, and cavity—all components in contact with the liquid—this invention significantly increases corrosion resistance and extends service life. Furthermore, the helical gear meshing of the driving gear and driven gear improves the liquid delivery rate and provides more accurate liquid measurement.

A power transmission device configured to transmit power of an engine provided in a vehicle traveling on at least one of water and in water to a propeller of the vehicle, the power transmission device including: an input shaft configured to input the power from the engine; an output shaft configured to output the power to the propeller; and a magnetic gear rotary machine magnetically coupling the input shaft and the output shaft. The magnetic gear rotary machine includes: a magnet rotor coupled to the input shaft; a pole piece rotor coupled to the output shaft; and a stator having a stator core extending in a circumferential direction at an outer side in a radial direction from the pole piece rotor and a stator coil disposed at the stator core.