62results about "Magnetic holding devices" patented technology

This disclosure provides a wind turbine generator system, including a base, a column, a rotor assembly, a blade assembly, a stator assembly, and an energy storage component; the column is vertically mounted on the base; the rotor assembly includes multiple spaced-apart segmented rotors, with an axial clearance between adjacent segmented rotors of [value missing]. λ1 The wind turbine assembly includes at least one blade; the stator assembly includes multiple segmented stators spaced apart on the column, with an axial clearance of λ2 between adjacent segmented rotors; a coil winding connected to the energy storage component is provided on one of the stator assembly and the rotor assembly; the stator assembly and the rotor assembly are nested together, with a radial clearance δ between the segmented stators and segmented rotors in the radial direction of the column, 0 < δ ≤ λ1 ， And δ≤ λ2 ； The segmented stator and segmented rotor are radially opposite each other on the column and have magnetic attraction between them. The axial component of the magnetic attraction is balanced by the sum of the weights of the fan blades and the rotor assembly. This scheme can improve the axial magnetic levitation stiffness to reduce the possibility of system damage.

The application provides a magnetic suspension mixed three-degree-of-freedom bearing and an air compressor, wherein the bearing comprises a radial magnetic bearing assembly and an axial magnetic bearing assembly, a permanent magnet capable of providing a bias magnetic field is clamped between the radial magnetic bearing assembly and the axial magnetic bearing assembly, the axial magnetic bearing assembly comprises a first axial stator core and a second axial stator core, the first axial stator core has a first magnetic ring, the radial thickness of the first magnetic ring is la, the second axial stator core has a second magnetic ring, the radial thickness of the second magnetic ring is le, and la < le. The application increases the radial thickness of the side with smaller axial output, thereby improving the axial output of the second axial stator core, making the structures of the first axial stator core and the second axial stator core asymmetric, achieving axial force balance design without increasing the overall volume of the bearing, meeting the axial load demand, and thereby improving the rotor dynamics characteristics.

This invention discloses a magnetically decoupled permanent magnet motor with axial active and radial passive levitation, belonging to the field of magnetic levitation motor technology. The magnetic levitation motor includes an axial stator disk assembly, an axial stator sleeve, and a motor unit. The motor unit has a radial air gap, and an axial air gap exists between the motor unit and the axial stator sleeve. The axial air gap contains axial bias flux and axial control flux, while the radial air gap contains torque flux. The rotor's axial translational degree of freedom is actively controlled, while the four radial degrees of freedom are passively stabilized. The axial levitation force and torque are naturally decoupled and independently controlled. The rotor in the motor unit of this invention adopts a "V"-shaped alternating pole structure with built-in permanent magnets, and the rotor core has air magnetic barriers, which improves the utilization rate of permanent magnet materials and the motor's torque output capability, while reducing costs.

The application relates to a rotor suspension position measurement method and a magnetic suspension motor. The method is applied to a magnetic suspension motor, and the magnetic suspension motor comprises a rotor and a target magnetic bearing. The target magnetic bearing has multiple degrees of freedom, and the method comprises the following steps: determining a component of the rotor mass in a target direction; generating a mass offset current according to the component of the rotor mass in the target direction; the target direction is a direction corresponding to any degree of freedom of the target magnetic bearing; obtaining a feedback current of a winding in the target direction in the target magnetic bearing at a current moment; determining a current error at the current moment based on the mass offset current and the feedback current; determining a target suspension position instruction value of the rotor in the target direction at the current moment through a linear controller based on the current error at the current moment; and the target suspension position instruction value is used to drive the suspension position of the rotor in the target magnetic bearing. The method can improve the accuracy of measuring the suspension position of the rotor.

AUXILIARY POWER SUPPLY FOR THE MICROROBOT FACTORY A wireless power supply system (1000) for a microrobot platform is disclosed herein. The system consists of a microrobot platform (100) and one or more wireless charging zones (111), in which the microrobot platform is configured to levitate above one or more wireless charging zones. The microrobot platform further consists of a microrobot (101), a plurality of printed circuit board layers (102) arranged in a stackable structure, a magnetic levitation stack (106A), a wireless power supply stack, and a microcontroller unit (107). The microrobot platform can be wirelessly charged using inductive charging, in which magnetically coupled induction loop coils transfer power from the wireless charging area to the microrobot platform. See Figure 1A for abbreviations.

This invention discloses a radial permanent magnet levitation bearing system for a high-speed direct-drive CT scanner, belonging to the field of magnetic levitation bearing technology. The bearing system comprises an inner ring system and an outer ring system similar to rolling bearings, consisting of a stator permanent magnet double semi-ring, a rotor permanent magnet ring, left and right auxiliary mechanical control and protection bearings, and multiple integrated bases. The stator permanent magnet double semi-ring is specially cut and rotated, and is concentrically fitted with the rotor permanent magnet ring with a clearance fit. The auxiliary bearings form a preloaded protection system. Stable levitation by permanent magnet force is achieved through mechanical control, eliminating the need for an electronic control system. The CT scanner motor rotor and stator are fixedly connected to the inner and outer ring systems of the radial permanent magnet levitation bearing, respectively, serving as magnetic levitation support for the CT scanner motor rotor. This bearing system ensures high-speed and stable operation of the CT scanner, increases its operating speed and service life, reduces operating noise, shortens CT examination time, and is suitable for medical and health environments, laying a theoretical foundation for the development of magnetic levitation CT scanners.

This utility model relates to the field of motor technology, specifically to a motor mover structure and a magnetic levitation motor. The motor mover structure includes a spindle, a mover assembly, and a magnet assembly. The mover assembly is movably sleeved on the outer surface of the spindle, and has a first magnetic pole and a second magnetic pole arranged axially. The magnet assembly includes a first magnet and a second magnet. The first magnet is connected to a first end of the spindle, and the second magnet is connected to a second end of the spindle. The first magnet and the first magnetic pole are adjacent to each other and mutually exclusive, as are the second magnet and the second magnetic pole. Through the repulsive force between the first magnet, the second magnet, and the mover assembly, direct contact and friction between the mover assembly and the magnet assembly and stator assembly are avoided, thereby reducing noise and wear, and improving the motor's working efficiency and service life.

This invention discloses a power electronic controller and control method for a five-degree-of-freedom magnetic levitation bearing, belonging to the field of magnetic levitation bearing control. It includes eight controllable switches and eight unidirectional conducting devices. Based on the connection method between the unidirectional conducting devices, controllable switches, and power supply, the eight bridge arms are divided into four forward bridge arms and four reverse bridge arms. Two forward bridge arms and two reverse bridge arms form a group of bridge arms. In each group, the two forward bridge arms and two reverse bridge arms are connected to five windings. By connecting the fifth winding of each group of bridge arms between every two windings of the first four windings, the current of each winding is controlled by changing the conduction time of each controllable switch. Only eight bridge arms are used to control ten windings. This invention reduces the complexity of the power electronic controller for a five-degree-of-freedom magnetic levitation bearing, while also reducing the controller's size and cost, thus possessing significant practical application value.

The application discloses a kind of magnetic power propelling magnetic suspension generator device and its application method, belong to generator technical field, the device of the present application includes base, control mechanism, energy storage mechanism, data monitoring mechanism, starting motor, transmission mechanism, suspension generator and adjustable magnetic power mechanism;Adjustable magnetic power mechanism is set on transmission mechanism, the two sides of the transmission mechanism are respectively connected with starting motor and suspension generator, the suspension generator is electrically connected with energy storage mechanism, the data monitoring mechanism, starting motor and the adjustable magnetic power mechanism are electrically connected with the control mechanism.The magnetic power propelling magnetic suspension generator device and its application method described above, greatly reduce the driving power of starting motor, save energy.

The application discloses a position determination method, device and equipment and a storage medium, and relates to the technical field of magnetic suspension. The magnetic suspension line body comprises a plurality of conveying sections, the method comprises the following steps: acquiring a feedback position value of each conveying section and the length of a mover on the magnetic suspension line body; determining a target position value according to the interval between two adjacent feedback position values and the length of the mover; and determining the position of the mover according to the target position value. Thus, the technical problem that a mover position determination method applied to a magnetic suspension system is urgently needed in the prior art can be solved.

The application belongs to the technical field of rotary body mechanism, and particularly relates to a magnetic suspension rotary body mechanism, which comprises a cover body, a connecting shaft rotatably arranged at the middle of the lower end of the cover body, a rotary body arranged at the upper end of the connecting shaft, a first fixed magnet fixedly connected to the upper end of a first magnet fixing base, a first rotary magnet arranged on the rotary body, a self-rotation shaft rotatably arranged on each side of the rotary body, a second magnet fixing base arranged on the self-rotation shaft, a second fixed magnet arranged on the second magnet fixing base, and a second rotary magnet arranged on the rotary body. The adjustable connecting assembly is used. When the connecting shaft is required to drive the rotation of a cylindrical object, the connecting shaft is extended into the inner cavity of the cylindrical object to drive the rotation of the connecting rod I and the connecting rod II, so that the plurality of inner supporting plates are expanded from the inside to the outside and are attached to the inner wall of the cylindrical object, thereby fixing the cylindrical object. At this time, the rotation of the connecting shaft drives the synchronous rotation of the cylindrical object, and the adaptability is high.

The utility model discloses a kind of magnetic levitation drive electrolytic fruit and vegetable cleaning machines, it is related to fruit and vegetable cleaning machine technical field, it mainly includes shell, stirring impeller, mesh cover, electrolytic sheet, motor and carousel, the upper end surface of shell is equipped with rotating shaft, stirring impeller is rotatably connected with rotating shaft, and the inside of stirring impeller is equipped with first magnet, mesh cover cover is equipped in the top of shell, electrolytic sheet is surrounded in the outer periphery of stirring impeller, motor is equipped in shell, carousel is fixedly connected in the output shaft of motor, second magnet is equipped in carousel, first magnet is arranged below second magnet in correspondence, the magnetic pole of first magnet facing second magnet is opposite the magnetic pole of second magnet facing first magnet, the utility model mainly uses magnetic levitation means to drive stirring impeller rotation, so as to avoid the risk of water seepage caused by the sealing failure due to various reasons, while avoiding the complex form of traditional gear to cause dirt to adhere to product, reduce the cleaning dead angle of cleaning machine itself.

The claw pole type magnetic suspension torque motor comprises a coaxial and gap matched stator assembly and rotor assembly; the stator assembly comprises an end cover, claw poles, a coil framework, coils and a magnetic conducting sleeve; the claw poles comprise upper claw poles and lower claw poles; the cavity formed between the upper claw poles and the lower claw poles is provided with the coil framework, and the coils are wound on the coil framework; the rotor assembly comprises an annular shell, permanent magnets, a base and a rotating shaft; the annular shell is sleeved outside the claw poles; the bottom of the annular shell is provided with the base; the base is provided with a base shoulder; a blind hole is formed in the center of the base shoulder; the lower end of the rotating shaft is fixedly arranged in the blind hole; the upper end of the rotating shaft passes through the magnetic conducting sleeve of the stator assembly upwards; the stator assembly is assembled with the rotating shaft of the rotor assembly through gap matching by means of the magnetic conducting sleeve. The motor does not need additional zero adjusting screws and zero adjusting springs; the rotor can be accurately suspended in the axial and circumferential middle positions under the magnetic force between the stator and the rotor; and the motor has the advantages of high stability, large rotation angle range and high torque density.

The application provides a five-degree-of-freedom hybrid magnetic suspension bearing, a motor and a control method thereof. The magnetic suspension bearing comprises an axial stator core, front and rear radial stator cores, first and second permanent magnet rings respectively arranged between the radial stator cores and the end portions of the axial stator core, an axial stator sleeve coaxial with a rotating shaft, a first thrust disc and a second thrust disc formed in the rotating shaft, a group of axial control coils arranged in the annular space between the first thrust disc and the second thrust disc, and the axial stator sleeve of the axial stator core arranged in the annular space. The first axial bias magnetic circuit formed by the first permanent magnet ring has a direction opposite to the second axial bias magnetic circuit formed by the second permanent magnet ring in the first thrust disc and the second thrust disc. The application can realize the adjustment control of the axial position of the thrust disc by controlling only the group of axial control coils, the control logic is simpler, the length of the corresponding rotating shaft can be shortened, and the rotating speed of the rotating shaft is improved.

This invention relates to a low-power radial magnetic levitation stator structure, comprising: multiple control windings and multiple bias windings wound according to the tooth cross-sectional dimensions of the stator core, nested on each tooth of the stator core, and with multiple slot wedges used for insertion and positioning of the control windings and bias windings; symmetrical control windings connected in series, with adjacent series-connected control windings connected in parallel; all bias windings connected in series sequentially; a controller connected to each set of series-connected control windings for x-axis and y-axis freedom direction control; each set of control windings connected to a displacement sensor, which feeds back a reference signal to the controller, generating a control magnetic field through the controller's output current. This low-power radial magnetic levitation stator structure uses only three power amplifiers, resulting in low overall power loss and simple control.

The application discloses a kind of outer rotor magnetic suspension bearing's double-rotor large energy storage equipment magnetic suspension bearing, including base, double motor, elastic diaphragm coupling, radial magnetic bearing, electromagnetic loading assembly, outer rotor and inner rotor.Outer rotor is coaxially nested envelope in the outside of inner rotor, is made of carbon fiber composite material to promote energy storage inertia;Radial magnetic bearing realizes the non-contact support of double rotor by controlled electromagnetic force;Electromagnetic loading assembly is distributed in key stress position, for applying active load or vibration suppression force.Control system integrates electric eddy current sensor, uses interval control algorithm based on uncertainty quantification, parameter fluctuation is handled as bounded interval variable, dynamically calculates displacement envelope line and actively adjusts stiffness and damping, suppresses nonlinear vibration and prevents rub-impact.The application has the advantages of large energy storage density, strong anti-rubbing ability, high running stability, etc., can significantly improve the reliability and energy cycle efficiency of large flywheel energy storage equipment under extreme conditions.

A method of manufacturing a semiconductor device includes preparing a substrate, grinding the substrate using a grinding apparatus, and dressing grinding tips of the grinding apparatus using a dressing unit of the grinding apparatus. The dressing unit includes driving parts, a dressing board on the driving parts, and magnets between the dressing board and the driving parts. The dressing board is configured to perform the dressing of the grinding tips of the grinding apparatus. The magnets are configured to generate one or more magnetic fields to float the dressing board from the driving parts using a repulsive force of the one or more magnetic fields.

This invention relates to the field of motor technology, providing a planar motor with an iron core structure, including a stator component, a mover component, and an air-bearing component. The stator component includes a permanent magnet array and a fixed plate, with the fixed plate disposed on one side of the permanent magnet array. The surface of the fixed plate away from the permanent magnet array forms an air-bearing surface. The mover component is movably disposed on one side of the fixed plate along the air-bearing surface, and includes a coil and an iron core, with the coil sleeved outside the iron core. The air-bearing component is fixed relative to the mover component, providing air-bearing support for the mover component. This configuration provides a magnetic path through the iron core, increases the magnetic flux between the permanent magnets and the coil, enhances the electromagnetic coupling strength, improves the thrust performance of the planar motor, and helps reduce the number of permanent magnets, thus lowering costs. Furthermore, the magnetic attraction between the iron core and the permanent magnet array provides preload force for the air-bearing component, avoiding the need for a separate preload component for the air-bearing component and improving the compactness of the planar motor.

The application belongs to the technical field of electric machines, and discloses a variable-stroke cylindrical linear motor driving device, which comprises a primary assembly, a secondary assembly and an I-shaped guide rail support, the primary assembly comprises at least one cylindrical primary, a through groove which is communicated with the inner cavity of the cylindrical primary is formed on the side wall of the cylindrical primary along the direction of the central axis, there is a groove between the guide rails of the I-shaped guide rail support, the cylindrical primary is fixed in the groove, the through groove faces upward, the central axis of the cylindrical primary is parallel to the direction of the guide rails, the cylindrical primary is connected with an external control system, the secondary assembly comprises a ferromagnetic cylindrical core and a cavity-outside projectile, the cavity-outside projectile is arranged above the cylindrical primary and is connected with the guide rails and can slide in cooperation with the guide rails, a connecting piece is arranged in the through groove, the upper end and the lower end of the connecting piece are connected with the ferromagnetic cylindrical core and the cavity-outside projectile respectively, and the ferromagnetic cylindrical core is suspended in the inner part of the cylindrical primary. The device can avoid the electromagnetic thrust fluctuation caused by the end magnetic field distortion.

This invention provides a repulsive body for a mechanical device that obtains mechanical driving force from a permanent magnet. [Solution] A semi-repelling body is constructed by mounting two permanent magnets 2 with their magnetic poles aligned on a single base plate 1, attaching a diamagnetic plate 3 to each permanent magnet, and further attaching a magnetic plate 4 bent into a mountain shape to the base plate. When the permanent magnet of the driving unit approaches, magnetic field lines concentrate at the corners of the magnetic plates, generating an attractive force. When the permanent magnet of the driving unit is at its closest approach, the repulsive force of the permanent magnet is neutralized by the diamagnetic material, and the resistance is minimized. When the semi-repelling body and the permanent magnet separate, a driving force is generated by the repulsive force between them. Since the two permanent magnets of the semi-repelling body are oriented in the same direction, if commercially available magnets are used as the permanent magnets of the driving unit, a strong repulsive force is generated due to the large surface area of ​​the N or S pole. The semi-repelling body is protected from external impacts by solidifying its perimeter with resin. This makes it easy to manufacture magnetic machines using semi-repelling bodies.

The application provides a low-vacuum pipeline magnetic suspension system superconducting linear motor stator module heat dissipation method, which comprises the following steps: monitoring the temperature rise of the stator winding, lifting the vacuum degree in the vacuum pipeline to a certain extent when the temperature rise of the winding exceeds the early warning temperature, closing the re-pressurizing valve when the air pressure reaches the preset value, spraying the cooling water of the preset temperature on the surface of the stator module and the bottom series cable by the pipeline spraying system, restoring the air pressure in the vacuum pipeline to the normal low-vacuum state after the spraying is completed, ensuring that the cooling water can completely boil and phase change to absorb heat, monitoring the temperature drop amplitude of the stator module in single heat dissipation, and repeating the above cycle if the stator winding in the whole heat dissipation interval is not completely reduced to the preset temperature after single heat dissipation. The technical scheme of the application solves the technical problems of high cost, many joints, low reliability, large eddy current, high magnetic resistance and inability to directly dissipate heat for the cable caused by the continuous laying of the water-cooled plate in the prior art.

A machine assembly includes a ferromagnetic annular rotor rotatable about a central vertical axis and configured to support at least one object. A plurality of levitation actuators are spaced circumferentially about the central axis and radially outwardly from the rotor. Each levitation actuator includes a permanent magnet configured to exert an attractive force on the rotor to levitate the rotor above a base surface, the attractive force having a vertical component along the central axis. A plurality of axial adjustment actuators are spaced circumferentially about the central axis and radially outwardly from the rotor. Each axial adjustment actuator includes an electromagnet configured to exert an attractive force on the rotor to adjust the position of the rotor along the central axis, the attractive force of each axial adjustment actuator having a vertical component directed in an opposing axial direction from the vertical component of the levitation actuators attractive force.

The application relates to the technical field of motor equipment, and provides a magnetic suspension motor system capable of improving heat dissipation effect and operation stability, which comprises a magnetic suspension motor with a shell accommodating a stator and a rotor, the surface of the shell is provided with an air inlet and an air outlet, the air inlet and the air outlet are communicated through an air cooling flow channel in the shell, a water chiller unit has a water inlet pipe and a water outlet pipe, a water cooling pipeline is arranged in the shell and is open to the water outlet pipe at one end and open to the water inlet pipe at the other end, the air inlet and the air outlet are further communicated through a backflow pipeline outside the shell, a surface cooling pipeline is arranged in a part of the wall of the backflow pipeline, the surface cooling pipeline is open to the water outlet pipe at one end and open to the water inlet pipe at the other end, and a fan is further arranged in the backflow pipeline and is configured to provide power to drive a circulating air flow formed in the backflow pipeline to flow from the air outlet to the air inlet.

This invention discloses a twelve-pole radial magnetic levitation bearing and its pole configuration control method, belonging to the field of magnetic levitation bearing technology. The stator poles of the twelve-pole radial magnetic levitation bearing consist of six pole pairs, with the pole polarity determined to be NSSNNSSNNSSN polarity configuration. Two sensors are used to detect rotor and directional displacement. The six pole pairs constitute three control degrees of freedom distributed at 120°. The pole configuration control method includes a displacement loop control algorithm, electromagnetic force distribution, and pole current distribution. Two-pole-pair, three-pole-pair, and six-pole-pair configurations are used corresponding to the rotor's maximum operating speed ranges of 0-30%, 30%-70%, and 70%-100%. This invention reduces the energy consumption of the magnetic levitation bearing while ensuring its load-bearing capacity by using different pole configurations within different rotor speed ranges, thus meeting the development requirements of high efficiency and high performance for magnetic levitation rotating machinery.

The application provides an unequal-length asymmetric double-layer permanent magnet array device. The device comprises: metal induction conductor plates are clamped in the middle by upper and lower double-layer Halbach permanent magnet arrays, the upper and lower Halbach permanent magnet arrays are asymmetrically arranged in thickness, the upper layer serves as a main suspension source, and the lower layer serves as an auxiliary balance source, and the magnetic blocks magnetized along the movement direction and the magnetic blocks magnetized along the normal direction in the same layer Halbach permanent magnet array are arranged in unequal length ratio; the unequal-length Halbach permanent magnet array is composed of permanent magnets periodically arranged along the movement direction, and a physical gap is arranged between the lower surface of the permanent magnet and the upper surface of the metal induction conductor plate. The topological structure of the device breaks through the limitation of the traditional single-side or symmetric double-side layout, and provides a physical basis for the collaborative optimization of electromagnetic repulsion, electromagnetic resistance and system stability. The method of the application successfully guarantees the optimal coordination of high float weight ratio and low electromagnetic resistance through step-by-step collaborative optimization of k1 frequency domain filtering resistance reduction and k2 asymmetric weight reduction.

This invention provides a stable magnetic levitation linear motor, comprising a housing, a cover, a permanent magnet, and a stator assembly. The housing has a mounting base at its lower part, with a mounting opening, a positioning groove, and multiple fixing barbs. Multiple positioning protrusions extend from the outer side of the electromagnet of the stator assembly, and these protrusions are embedded in the positioning groove. The top of the cover has multiple elastic fastening frames adapted to the fixing barbs. When the cover is fastened to the housing, the elastic fastening frames lock with the fixing barbs, and the cover presses the positioning protrusions tightly within the positioning groove. Thus, the stator assembly is fixed in one step by fastening the cover, simplifying the assembly process. Furthermore, the use of elastic fastening frames to fasten the fixing barbs provides all-around restriction of wobbling, resulting in better fixation performance, more balanced force distribution during motor operation, and more stable overall performance.

The embodiment of the application provides a kind of implantable magnetic suspension blood pump's magnetic suspension motor system, it is related to medical instrument technical field, motor control mainboard integrates central control module, motor drive module, closed loop feedback module;The closed loop feedback module detects the suspension offset data and actual operating current of the rotor, and the central control module is fed back by double closed loop;Central control module utilizes the suspension offset data and actual operating current, adopts built-in control algorithm, generates pulse width modulation PWM control signal, and the motor drive module converts PWM control signal into suspension current and rotating current, suspension current includes the first current for maintaining the radial suspension of rotor and the second current for maintaining the axial suspension of rotor, and the current of the electromagnetic coil is adjusted using the suspension current and rotating current, to maintain the suspension rotation of rotor.The system provided by the embodiment can improve the stability of the suspension rotation of the magnetic suspension motor.

The present invention relates to a magnetic levitation control device and a magnetic levitation motor system based on a global single clock source. The magnetic levitation control device includes a sensor module, a power amplification module, an A / D conversion module, a magnetic levitation motor, and a magnetic levitation control unit. The clock signal of the magnetic levitation control device is generated based on a global single clock source and includes a sensing clock for detection by the sensor module, a sampling clock for sampling by the A / D conversion module, and a power amplification clock for driving the power amplification module. The sensor module is configured to detect control data for the magnetic levitation motor and output a sensor signal. The A / D conversion module is configured to convert the sensor signal into a sampled signal. The magnetic levitation control unit is configured to perform data processing on the sampled signal to generate a power amplification signal. The power amplification module is configured to generate a PWM signal and to excite the electromagnetic coil in the magnetic levitation motor based on the PWM signal. The present invention can improve the system's signal-to-noise ratio and interference immunity, eliminates the need for an additional synchronization module, and has a simple and low-cost system structure.