107 results about "Magnetic gear" patented technology

The invention discloses a Y-axis knife rest reliability test bed with hybrid loading and precision testing integrated and a test method, and belongs to the technical field of reliability testing of key components of numerical control machine tools. The test bench comprises a test bench base, an automatic rotary table, a torque loading device, a loading device base, a dynamic force loading device, an analog loading rod, a Y-axis positioning precision testing device, a tested Y-axis tool rest, a transposition precision testing device and a console. A tool rest bottom plate of the test bench base is controlled by a console to move left and right and up and down, and a tested Y-axis tool rest is installed on the tool rest bottom plate. The automatic turntable comprises a turntable driven by a motor; the torque loading device comprises a generator fixed on the rotary table, and the output end of the generator is fixedly connected with a magnetic gear; the analog loading rod comprises a vertical shaft and a horizontal shaft which are in vertical transmission; the lower end of the vertical shaft is in electromagnetic induction non-contact connection with the magnetic gear; the tail end of the horizontal shaft is connected with the output end of the tested Y-axis tool rest. And the dynamic force loading device can apply a load to the analog loading rod shell.

The utility model provides a motor assembly and a fan, and the motor assembly comprises a driving motor which comprises a first output shaft; the magnetic gear comprises a driving rotor, a driven rotor and a magnetism adjusting ring, the driving rotor and the driven rotor are located on the two opposite sides of the magnetism adjusting ring respectively, the driving rotor is installed on the first output shaft, and the driven rotor can rotate under the action of the driving rotor; the driven rotor comprises a second output shaft which is installed on the first output shaft and can rotate relative to the first output shaft. When the first output shaft rotates, the second output shaft can reversely rotate relative to the first output shaft. According to the motor assembly, opposite driving force can be output through the first output shaft and the second output shaft, so that a counter-rotating motor is formed. Meanwhile, according to the counter-rotating motor, the cost of the motor assembly is reduced, the structure of the motor assembly is simplified, and the counter-rotating motor has the advantages of being free of mechanical friction, small in vibration, low in noise, capable of preventing overload and the like.

The utility model provides a magnetism adjusting assembly, a magnetic gear, a contra-rotating motor and a fan, the magnetism adjusting assembly is used for a motor, and the magnetism adjusting assembly comprises an installation support; the magnetism adjusting ring comprises a mounting piece; the installation part is installed on the installation support, the multiple magnetism adjusting teeth are installed on the installation part at intervals in the first circumferential direction, a magnetism isolating hole is formed between every two adjacent magnetism adjusting teeth, the ends, in the length direction, of the multiple magnetism adjusting teeth are connected with the installation part, and the other ends, in the length direction, of the multiple magnetism adjusting teeth are arranged in a suspended mode; and the mounting piece and the plurality of magnetism adjusting teeth are of an integrated structure. According to the magnetic adjusting assembly, most areas of the plurality of magnetic adjusting teeth along the length direction are not connected, so that magnetic isolating holes with larger spaces are formed among the plurality of magnetic adjusting teeth, magnetic leakage can be effectively prevented, and the magnetic moment transmission effect between the driven rotor and the driving rotor is improved. Therefore, when the magnetism adjusting ring is used for the magnetic gear, the load capacity of the magnetic gear can be improved, and the out-of-step risk of the magnetic gear is reduced.

A wind turbine with adaptive nacelle preferably includes a geared blade shaft; and at least one reciprocating generator unit. The geared blade shaft includes a plurality of blade magnets attached to an outer perimeter of the blade shaft, which extend a portion of a length of the blade shaft. Each reciprocating generator unit preferably includes an intermediate magnetic gear, at least one magnetic generator gear, at least one electrical generator, at least one actuator and a retention frame. The intermediate magnetic gear and the at least one generator magnetic gear are pivotally retained in the retention frame. The at least one electrical generator is retained on the retention frame. The at least one actuator is used move the reciprocating generator unit to engage rotation of the geared blade shaft with the intermediate magnetic gear. Rotation of the geared blade shaft causes rotation of the electrical generator.

The application relates to a double-side coupling axial nutational magnetic speed reducer and a working method thereof. The speed reducer comprises a box, an input shaft is arranged at the left end of the box, a rotating disc is arranged at the right side in the box, a nutational disc is arranged in the box and rotates with the input shaft, first and second nutational magnetic gears are arranged at the left and right end faces of the nutational disc respectively, a fixed magnetic gear is arranged at the left end of the box and is magnetically coupled with the first nutational magnetic gear, and a movable magnetic gear is arranged at the left end face of the rotating disc and is magnetically coupled with the second nutational magnetic gear. The double-side coupling axial nutational magnetic speed reducer can realize few-pole difference, has simple structure, large transmission ratio and high transmission efficiency, the axial forces generated by the axial magnetic gears on the two sides can be effectively offset, the service life of bearings is prolonged, the axial force is small, and transmission is stable.

The invention discloses a high-inertia multi-port composite motor for new energy grid connection. The high-inertia multi-port composite motor comprises a brushless doubly-fed motor, an axial permanent magnet motor and a magnetic gear structure. The brushless doubly-fed motor comprises a radial stator and a squirrel cage rotor, a power winding and a control winding are arranged in the stator and serve as a first electric port and a second electric port respectively, the axial permanent magnet motor comprises an axial stator and an axial permanent magnet rotor, and an armature winding is arranged in the stator and serves as a third electric port. The magnetic gear structure is arranged on the inner side of the squirrel cage rotor and the outer side of the rotating shaft, a brushless doubly-fed motor rotor magnetic field is used as a modulation magnetic source, the phase and amplitude of the magnetic field are adjustable, dynamic adjustment of the transmission ratio of the magnetic gear is achieved through a control winding, and electromagnetic and mechanical dual coupling is achieved. The equivalent rotational inertia of the composite motor is obviously higher than that of a single machine, stronger inertia support and frequency stability can be provided for a power grid in a new energy grid connection process, and the composite motor is provided with three independent electric ports, realizes multi-mode operation, and is compact in structure and high in power density.

The application provides a coaxial double-rotor thrust system based on a magnetic gear, comprising: a power source comprising a power input shaft; a magnetic gear comprising an inner ring, an outer ring and a modulation ring arranged between the inner ring and the outer ring; wherein the power input shaft is connected with the inner ring; an inner thrust output shaft, one end of the inner thrust output shaft being connected with the modulation ring, the other end of the inner thrust output shaft being provided with a rotor or a propeller; an outer thrust output shaft, one end of the outer thrust output shaft being connected with the outer ring, the other end of the outer thrust output shaft being provided with a rotor or a propeller; wherein the rotation direction of the outer ring is opposite to that of the modulation ring; the coaxial double-rotor thrust system based on the magnetic gear can realize co-axial forward and reverse rotation of the rotor / propeller and has a certain reducer function, so that the transmission and power structure are greatly simplified.

The invention discloses a triboelectric wheel speed sensor based on a magnetic field modulation mechanism, and belongs to the technical field of speed measurement sensing. The sensor comprises a mechanical sensing unit and a signal processing unit, the mechanical sensing unit adopts a coaxial nesting structure of a low-speed rotor, a fixing device and a high-speed rotor, and low-speed rotation is converted into reverse high-speed rotation of the high-speed rotor by utilizing a magnetic gear mechanism, so that the friction nano power generation unit is driven to generate an alternating-current voltage signal of which the frequency is in direct proportion to the rotating speed; and the signal processing unit is used for processing the signal and calculating the wheel speed and the linear speed. Magnetic field modulation and friction power generation are combined, the output signal frequency and the signal-to-noise ratio under the low-speed working condition are effectively improved, the self-energy-supply characteristic is achieved, the defects that a traditional sensor is weak in signal and depends on an external power source at the low speed are overcome, and a high-reliability solution is provided for intelligent traffic wheel speed monitoring.

An electric-powered vehicle includes: an axle body that includes an axle and drive wheels connected to both ends of the axle; a magnetic geared motor for rotating the axle, the magnetic geared motor including a stator, a low-speed rotor, and a high-speed rotor; a vehicle structure supported by the axle body; a motor support for connecting the vehicle structure and the stator, and supporting the magnetic geared motor by the vehicle structure; and an elastic coupling for coupling the low-speed rotor and the axle such that a rotational force of the low-speed rotor is transmittable to the axle.

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.

A magnetic geared electrical machine includes: a stator; a magnetic pole piece rotor including a plurality of magnetic pole pieces disposed radially inward of the stator; an inner rotor including a plurality of rotor magnets, disposed radially inward of the plurality of magnetic pole pieces, and configured to rotate at a higher speed than the magnetic pole piece rotor; and a fan for cooling at least one of the stator, the magnetic pole piece rotor, or the inner rotor. The magnetic pole piece rotor further includes a power transmission shaft disposed on one side in an axial direction relative to the plurality of magnetic pole pieces, and configured to transmit rotational power to and from an external device. The fan is attached to the inner rotor on an opposite side to the power transmission shaft with the rotor magnet therebetween in the axial direction.

Hydrokinetic fluid turbines utilize a flowing body of liquid to translate the kinetic energy of the fluid into electric power or other useful energy. The available kinetic energy is proportional to the squared fluid velocity in an open channel with a fixed cross-sectional area. The proposed twin turbine system coupled with a cycloidal magnetic gear exploits the hydrokinetic energy existing in open-channels.

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.

In some aspects, a magnetic gear system includes a flux focusing magnet arrangement having a low-pole count rotor, a pair of modulator rotors disposed on either side of the low-pole count rotor, and a pair of high-pole count outer rotors disposed outside of the pair of modulator rotors. In some aspects, a magnetic gear system includes a motor with a stator and a pair of low-pole count rotors disposed on either side of the stator. The magnetic gear system further includes a pair of modulator rotors disposed on either side of the motor, and a pair of high-pole outer rotors disposed on opposite sides of the pair of modulator rotors.

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.

A magnetic gear rotary electric machine includes a housing, a stator having a stator core, a coil, and a stator magnet provided on an inner side of the stator core, a first rotor having a pole piece provided on an inner side of the stator, a second rotor having a rotor core provided on an inner side of the first rotor and a plurality of rotor magnets provided at intervals in a circumferential direction on the rotor core, a plurality of movable bearings provided on the housing, abutting against an outer peripheral surface of at least one of the first rotor and the second rotor, and arranged at intervals in the circumferential direction, and an actuator that moves the movable bearings in a direction including a plane orthogonal to an axis.

The utility model discloses a rear electronic transmission which comprises a rear derailleur and a power supply, and the power supply supplies power to the rear derailleur. The rear derailleur comprises a shell, a driving unit, a transmission unit, an output unit, an induction piece and a circuit board. Wherein an accommodating cavity is formed in the shell; the driving unit is arranged in the accommodating cavity; the transmission unit is arranged in the accommodating cavity and comprises a first gear set, a second gear set and a magnetic gear set which are sequentially meshed, and the first gear set is in transmission connection with the driving unit; the output unit is at least partially arranged in the accommodating cavity and is in transmission connection with the magnetic gear set; the induction piece and the magnetic gear set are correspondingly arranged; the circuit board is electrically connected with the power supply, and the circuit board is electrically connected with the driving unit and controls the driving unit to operate. According to the gear shifting mechanism, accurate gear shifting can be achieved.

A stator core includes: a core inner peripheral surface along which a plurality of magnets is arranged; a first projection protruding radially inward from the core inner peripheral surface and having a first support surface supporting the first inclined surface; and a second projection protruding radially inward from the core inner peripheral surface and having a second support surface supporting the second inclined surface. Both the first support surface and the second support surface are inclined with respect to the radial direction and slope toward the center of the first radial magnet as they extend radially inward.

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.

This invention relates to an alternating pole geared motor, comprising an outer stator, an outer rotor, and an inner rotor. The inner wall of the outer stator has an annular distributed winding, and the interior of the outer stator has an annular weakening winding. The outer rotor is rotatably mounted on the outside of the outer stator. The inner rotor is rotatably mounted on the outside of the outer rotor. The inner rotor consists of a first rotor segment and a second rotor segment connected axially. The first rotor segment includes multiple first magnets and multiple first magnetic blocks, with the first magnetic blocks and first magnets arranged alternately circumferentially along the inner rotor. The second rotor segment includes multiple second magnets and multiple second magnetic blocks, with the second magnetic blocks and second magnets arranged alternately circumferentially along the inner rotor. The magnetization direction of the first magnets is opposite to that of the second magnets, and the first magnets and second magnets are offset axially from each other on the inner rotor. This invention solves the technical problems of complex structure, high energy consumption, and susceptibility to damage in marine propulsion systems.

The invention relates to a compact motor reducer and joint module for a humanoid robot. The compact motor reducer comprises a planet magnetic gear composite motor and a secondary planet wheel assembly. The planetary magnetic gear composite motor comprises a stator winding, a magnetic gear ring and a primary planetary magnetic gear transmission mechanism, and the primary planetary magnetic gear transmission mechanism is magnetically coupled with the stator winding and the magnetic gear ring respectively; the second-stage planet wheel assembly comprises a second-stage sun wheel, a second-stage planet wheel, a second-stage inner gear ring and a second-stage planet carrier, the second-stage sun wheel is in transmission connection with the output end of the first-stage planet magnetic gear transmission mechanism, and the second-stage sun wheel, the second-stage planet wheel and the second-stage inner gear ring are sequentially in meshing transmission to form a gear planet transmission pair. The planetary magnetic gear composite motor and the second-stage planetary gear assembly are arranged in series in the axial direction. The motor and a primary planetary transmission mechanism are integrated, and magnetic gear transmission is adopted, so that the axial size is shortened, the weight is reduced, the transmission efficiency is improved, the back clearance is reduced, and the operation noise can be reduced.

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 invention discloses a novel magnetic gear and a cogging torque suppression method thereof, and relates to the technical field of magnetic gears. The magnetic gear comprises a high-speed rotor, a low-speed rotor, an external adjusting magnetic ring and an internal adjusting magnetic ring, the external adjusting magnetic ring comprises three groups of unequal-width magnetic conductive blocks, and the internal adjusting magnetic ring comprises two groups of unequal-width magnetic conductive blocks; the high-speed rotor and the low-speed rotor adopt the design of different pole pairs, double-magnetic-flux path transmission is realized through the double adjustable magnetic rings, and the magnetic field modulation effect is enhanced. According to the cogging torque suppression method, the magnetic resistance is balanced by optimizing the width ratio (the width ratio of three groups of outer rings is 0.5: 0.6: 0.6, and the width ratio of two groups of inner rings is 0.5: 0.6) of the magnetic conductive blocks, and the torque fluctuation is suppressed. The motor remarkably improves the torque density under the same volume, reduces the vibration noise, and is suitable for the fields of wind power, electric automobiles and the like.

A magnetic array for use in a synchronous electrical machine or a magnetic gear box, comprising a plurality of discrete magnetic segments. When individual ones of the segments are spaced away from influence of ferromagnetic material, such as prior to placement in the array, each includes a pole having the same maximum field strength. Each segment is positioned in a sequence along a circumferential array with changes in field orientation by which the field of each segment is spatially rotated relative to the field of a next segment in the sequence. Each segment is positioned in sufficient proximity to the next segment in the sequence to enable the fields to interact with one another and effect flux channeling.

1. Name of the designed product: radial electromagnetic gear transmission (non-contact type). 2. Use of the designed product: device for magnetic transmission. 3. Design points of the designed product: in shape. 4. Picture or photo best indicating the design points: perspective view 1.

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.

The present description relates to an electrical machine (21) comprising: a stator (19c) having an internal surface (190c) delimiting a cavity centered on an axis of rotation (X'') of the electrical machine; a plurality of first electromagnets (57) configured to generate a first magnetic field, the plurality of first electromagnets (57) being fixed to the stator (19c); a magnetic generation device (50) configured to generate a second magnetic field, the magnetic generation device (50) being fixed to the stator (19c); a magnetic excitation device (51); and a first shaft (19a) extending within the cavity along the axis of rotation (X''); and a second shaft (19b) extending within the cavity, along the axis of rotation (X''), being concentric with the first shaft (19a);in which one of the first and second shafts (19a, 19b) is configured to generate a third magnetic field, following excitation by the magnetic excitation device (51), the third magnetic field being synchronized with: the first magnetic field so as to implement an electromechanical conversion between a mechanical power from one of the first shafts (19a) and the second shaft (19b), and an electrical power from the plurality of first electromagnets (57); and the second magnetic field so as to transmit a torque between the first shaft (19a) and the second shaft (19b). Figure for the abstract: Figure 11b;

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.

The application discloses a high-torque-density double-winding permanent magnet motor based on a magnetic gear effect and relates to the technical field of motors.The application comprises a stator core, a fundamental wave winding, a harmonic wave winding, a modulation unit and a permanent magnet rotor; a half-closed slot is formed in the inner surface of the stator core, two sets of windings which are not coupled and have different pole pairs are placed in the slot, one set of the windings is the fundamental wave winding, and the other set of the windings is the harmonic wave winding; the modulation unit is composed of non-magnetic blocks and magnetic blocks which are alternately arranged along a circumference, is connected with the inner surface of the stator core, and only an air gap exists between the modulation unit and the permanent magnet rotor; the permanent magnet rotor is a magnetic gathering type permanent magnet rotor and comprises a tangential excitation permanent magnet and a magnetic separation slot structure. The two sets of windings can efficiently utilize the harmonic magnetic field and the fundamental wave magnetic field, the independent modulation unit is adopted to realize the optimal modulation ratio of the motor, the single air gap structure is beneficial to improving the working magnetic density of the motor, and the torque density of the motor driving system is effectively increased.

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.