342 results about "Electromagnetic suspension" patented technology

An apparatus and method for a centrifugal pump for pumping sensitive biological fluids which includes (i) an integral impeller and rotor which is electromagnetically supported and rotated, (ii) a pump housing and arcuate passages for fluid flow and containment, (iii) a brushless driving motor embedded and integral with the pump housing, (iv) a power supply, and (v) specific electronic sensing and control algorithms-all fitly joined together to provide efficient, durable and low maintenance pump operation. A specially designed impeller and pump housing provide the mechanism for transport and delivery of fluid through the pump to a pump output port with reduced fluid turbulence.

A cylindrical linear motor, an electromagnetic suspension, and a vehicle using the same, which can generate a large thrust and reduce torque pulsations and cogging torque. The cylindrical linear motor comprises a stator and a slider disposed with a gap left relative to the stator and being linearly movable relative to the stator. The stator comprises a stator core having stator salient poles, and 3-phase stator windings inserted in slots formed in the stator core. The slider comprises a plurality of permanent magnets fixed to a slider core. The motor satisfies τp:τs=9:9±1 where τs is a pitch of the stator salient poles and τp is a pitch of the permanent magnets.

An electromagnetic suspension system comprises a universal joint mechanism for permitting radial movement of a cylinder relative to a center yoke while preventing axial movement of the cylinder relative to the center yoke. Since the cylinder is capable of radial movement relative to the center yoke, if a lateral force acts on the cylinder, the lateral force acting on a hydraulic damper does not have any significant effect on the center yoke 17, with respect to radial movement or rocking movement thereof. Therefore, excessive sliding friction does not occur in a center-yoke dry metal and a piston-rod dry metal, thereby ensuring smooth axial relative displacement between the center yoke and an outer yoke.

The invention relate to a piezoelectric ultrasonic/high-frequency electromagnetic hybrid suspension non-contact smelting method and a device, which belong to the technical field of non-contact material smelting. The device comprises a sealing box, an ultrasonic generator, an ultrasonic transducer, a high-frequency inductive power source, a high-frequency inductor, a base, deflating and inflating equipment, an infrared temperature measurer, a pressure gauge, an ultrasonic wave reflecting end and an adjusting device of the ultrasonic wave reflecting end. Ultrasonic suspension force and electromagnetic suspension force jointly act on suspended particles (metal), or the electromagnetic suspension force independently acts on the suspended particles, and the suspended particles generate electromagnetic induction in a high-frequency magnetic field generated by the high-frequency inductor, and are heated until the suspended particles are melted. The output power of the high-frequency power source is reduced, a melted article independently acts under the effect of the ultrasonic wave suspension force, and is cooled to form solid in a suspension state. Smelting of materials is completed in a state without a container, high-purity alloy without impurities can be prepared, and non-contact smelting of metal with active chemical properties can be carried out.

The invention relates to a suspension rotor micro gyro by utilizing electromagnetism and charge relaxation to work, which is used in the field of navigation control of satellites, automobiles, and the like. The suspension rotor micro gyro consists of upper and lower stators, a micro rotor and a peripheral structure which form a cage structure. The stators comprise rotary driving electrodes, axial suspension detection electrodes, first suspension stabilization coils and second suspension stabilization coils, and are fixedly connected to a substrate; and under the action of electromagnetic force, the micro rotor suspends between the stators and has an annular shape, the inside and outside of the annulus are provided with surrounding structures which are mainly radial suspension electrodes and radial suspension detection electrodes. The micro gyro has simple structure, provides an electromagnetic suspension charge relaxation rotary structure, and can realize the self-stable suspension of the rotor by axially arranging inner and outer suspension stabilization coils. The axial and radial suspension detection electrodes can further enhance the suspension rigidity and realize position detection. The suspension rotor micro gyro has the characteristics of small size, light weight, low cost, high precision and low power consumption.

The invention discloses a five-phase cylindrical fault-tolerant permanent magnet linear actuator for driving a vehicle electromagnetic suspension. The fiver-phase cylindrical fault-tolerant permanent magnet linear actuator comprises a stator ring, a rotor ring and a supporting shaft. The stator ring is composed of a disc-shaped primary iron core and a disc-shaped winding, the primary iron core is formed by arranging identical standard-E-shaped iron core bodies in the axial direction, teeth, leaning together, of the adjacent standard-E-shaped iron core bodies form fault-tolerant teeth, a concentrated winding is adopted as the winding, the winding is wound into a disc shape to be embedded into an E-shaped iron core groove, and the rotor ring comprises a permanent magnet and is arranged on the supporting shaft. The reliability and the capability of operation with faults of the fiver-phase cylindrical fault-tolerant permanent magnet linear actuator are improved, and physical isolation and magnetic path decoupling among phases are achieved. The fiver-phase cylindrical fault-tolerant permanent magnet linear actuator can operate in a fault-tolerant mode, and the heat dispersion performance of the winding is improved. Eddy-current losses on the iron core are lowered.

Disclosed are a high-damping and high-thrust cylindrical linear motor and a motor-driven power steering device. A stator includes three-phase stator and a stator core. A slider includes a slider core and permanent magnets. The stator core includes stator-core salient poles, two auxiliary poles and yoke units with a small poles on its surface of the side of the slider, the auxiliary poles being deployed at both ends of the stator-core salient poles, the yoke units configuring a magnetic circuit in cooperation with the stator core and the auxiliary poles. The magnetic circuit is shared among the three phases. Polarities of magnets of the slider become an identical polarity, each of the plurality of permanent magnets being positioned at a position which is opposed to each of the plurality of small poles included in one stator-core salient pole out of the plurality of stator-core salient poles.

The invention discloses a method for preparing a contact material having high performance and low mixed copper-chromium alloy content. The method comprises the following steps of: (1) mixing a metal copper material and a metal chromium material according to a proportion of 10-75 weight percent of the weight content of the chromium to prepare a sample according to alloy components required by a process; (2) pressing the prepared mixed material powder into blocks, or preparing the prepared mixed material powder into alloy prefabricating ingots through vacuum induction smelting or vacuum non-consumable arc smelting; (3) under the protection of inert gas, heating and smelting the alloy prefabricating ingots in a vacuum electromagnetic suspension stove or a cold crucible stove through high-frequency induction; and (4) cooling and solidifying by adopting high-purity inert gas or a water-cooling copper crucible to obtain copper-chromium alloy ingots. The preparation method has uniform alloy components, low content of gas such as oxygen, nitrogen, and the like, dense texture, uniform component, high purity and fewer impurities, greatly improves the performance of the copper-chromium alloy contact material, can avoid pollution of crucible materials to the alloy at high temperature and ensures that the microscopic structure of the alloy is more uniform.

A micro rotation gyroscope with double stator and electromagnetic suspension rotator consists of top base body, top stator, micro rotator, bottom stator, bottom base body and seal ring .It features that micro rotator is a conductive ring; rotary coil sensing electrode and suspension-stabilizing coil prepared by photo etching-plating are applied on top and bottom base bodies; the structure of top stator is completely the same as the structure of bottom stator except spacing column of micro rotator is set on bottom stator.

This invention discloses a magnetically levitated centrifugal fan of high electro motion, which includes: the shell of the electric motor in which there is the first radial axletree, the stator of the motor, the second radial axletree, the first thrust axletree and the second thrust axletree; the shell is connected with a turbine through back tray, a main axis is set on the central axes in the space of the shell, on the main axis there is orderly the rotor of the motor matched with the motor stator, the thrust disk and the impeller; the impeller is in the eddy shell on which the axes-directed air input and the radial directed air output are equipped. This invention use the design of coaxal motor rotor and the thrust disk, the radial axletree and the thrust axletree adopt magnetic levitated axletree or air axletree. This invention has high speed, small cubage, light weight, large flux, high efficiency, convenient charge adjustment and non-pollution.

The invention discloses a novel superfast train by utilizing ground effect pneumatic suspension and electromagnetic propulsion, and belongs to the field of ground effect aerodynamics and superfast trains. According to the novel superfast train, pneumatic modification is conducted to the train bottom of an existing magnetic suspension train, the train bottom forms a continuous smooth contracted type curved surface, and a contracted air passage is formed by the contracted curved surface and the surface of a rail. The sectional surface of the train head in an entrance portion is the largest, and the sectional surface of the train tail in an exit is the smallest. Electromagnetic force is replaced by pneumatic lifting force generated by the ground effect so as to suspend the train, the advantages that the existing magnetic suspension train is low in resistance and slow in speed are reserved, the problem of power energy consumption of magnetic suspension is improved, the weight of vehicle-mounted superconduction relative devices is reduced at the same time, energy consumption of the train in the process of superfast running is reduced and efficiency of transporting is improved.

The invention relates to a wind power magnetic suspension yaw motor control method based on model predictive control and belongs to the technical field of electrical engineering. According to the method, the model predictive control technology is used, and the suspension and yaw rotation processes of a magnetic suspension yaw motor is smoothly controlled in real time. When a wind direction changesand yaw is needed, firstly a rotor current converter finds an optimal control law through a cost function to control the current of a rotor, thus the rotor is suspended upwards and is maintained at asuspension equilibrium point, secondly a stator converter finds an optimal control law through a cost function to control the current of a stator, thus the yaw motor rotates to a wind position according to a specified rotation speed, at the same time the rotor converter finds an optimal control law through a cost function to control the current of a rotor, thus the rotor is maintained at the suspension equilibrium point, the coordinated control of the stator and the rotor can be realized without decoupling, the fast tracking ability and stability of a system are ensured, at the same time, theinfluence of external disturbance on system operation can be effectively suppressed, and the system performance in an entire suspension yaw rotation process is optimal in real time.

This invention relates to a covered compound carbon-base inorganic electromagnetic shield material, its preparation method and usage, which mixes carbonyl iron, carbonyl nickel or a mixture of carbonyl iron and nickel with carbon base powder in the weight percentage of 50-90 : 10-50 and suspends them fully with an electromagnetic suspension blender under inert gas atmosphere and 35-103dge.C to get powder, which is heated under 100-450deg.C inert gas atmosphere to become a covered compound carbon base electromagnetic shield material.

The invention discloses a turbocharger. The invention adopts a technical proposal that the turbocharger comprises a turbine rotor shaft assembly, an intermediate, a pressure housing, a diffusion plate fixedly connected with or integrally formed with the pressure housing, wherein the turbine rotor shaft assembly is at least provided with a set of permanent magnet rings matched with each other between a turbine and a compressor impeller. The permanent magnet rings comprise at least one permanent magnet dynamic ring and at least one permanent magnet static ring which are matched with each other to suspend a rotor shaft of the turbine rotor shaft assembly. The invention provides a friction-free turbocharger which uses permanent magnet rings to suspend the rotor shaft of the turbine. The turbocharger can solve the problems of susceptibility to damage, oil leakage and pollution, reduce response lags, and does not cause serious influence on the engine except for reduction in power when damaged. The turbocharger solves the problems of susceptibility to damage, oil leakage and pollution of the prior turbocharger and overcomes the drawbacks such as high price, large volume and complex structure of electromagnetic suspension bearing exhaust turbocharger.

This invention relates to one inner stable hanging ring rotor micro rotation top in micro machine system technique field, wherein, setting the stable float coil, rotation coil and sensor electrode onto base to form fix connection and base; micro rotor is floating one the base under electronic magnetic force and the ring rotor is under function of hanging coil force to get stable hanging outside rotation coil to generate rotation magnetic field; micro rotor is under rotation magnetic field to generate rotation torque for high speed rotation through sensor electrode.

The micro-operator is fixed on the moving object. A group of permanent magnet arrays (PMA) are buried into the bottom and four sides of the object. A group of wire arrays are set corresponding to each group of PMA. Whenever the electric current flows through the wire arrays under the moving object, the electric-magnetic field produced by the wire arrays interacts with the magnetic field produced by the PMA. It causes the moving object floating. By means of changing the direction and magnitude of the current in each group of the wire arrays, the 6-dimension space micro-movement needed by the micro-operator can be realized. This is such a Nano-lever movement, which has advantages of great working range, high precision and fast response time. This apparatus suits mainly for fields as the micro mechanical-electric system, the biology engineering, IC chip manufacture technique, the molecule and atom control, etc.

An electromagnetic suspension and rotary drive system comprises at least one conical bearingless motor/generator. Each conical bearingless motor/generator comprises a rotatable part and a stationary part. The rotatable part has an axis of rotation with respect to the stationary part. The stationary part has one or more windings for producing a drive field and a control field. The drive field is provided for exerting a torque on the rotatable part to transfer energy between the rotatable part and the stationary part. The control field is provided for exerting a force on the rotatable part to levitate the rotatable part. The force exerted by the conical bearingless motor/generator is adapted to be directed at an angle greater than 0° and less than 90° relative to the axis of rotation of the rotatable part.

The invention relates to an electromagnetic suspension static electricity driving micro-rotating gyrostat in the field of Micro Electro-Me-chanical Systems technique. It comprises: a rotation driving electrode, a micro-rotor, a stabilizing floating coil collar, a tooth outline electrode, a sensing electrode, a base body, a stabilizing floating coil inner ring and a connecting line, wherein the stabilizing floating coil collar, the stabilizing floating coil inner ring, the sensing electrode and the rotation driving electrode are fixed on the base body and forms to the fixed connection; the micro-rotor is positioned on the upper of the base body on the electromagnetic force effect; the micro-rotor is loop type with the tooth outline electrode, the rotation driving electrode and the tooth outline electrode distributed on the inner side of the loop to form the variable capacity; the stabilizing floating coil inner ring is connected with the stabilizing floating coil collar by connecting wire.

The invention discloses a magnetic-air suspension axial bearing with a porous medium, which comprises a static air pressure system and an electromagnetic suspension system. The bearing comprises a shaft, a thrust disc, a first stator, a second stator and an adjustment pad, wherein eight magnetic poles are arranged on the first stator and arrayed according to an NSSNNSSN manner; every two adjacentmagnetic poles are a pair; and the second stator and the first stator have the same structure. An assembly relationship is as follows: the external circumference of the thrust disc is sleeved with theadjustment pad; the first stator and the second stator are oppositely mounted on the two sides of the thrust disc; and the magnetic poles of the first stator and the second stator face towards the inner side. The bearing can integrate the static air pressure system and the electromagnetic suspension system; an auxiliary support and circulatory cooling system is not required to be adopted independently; the friction and abrasion of the bearing can be greatly reduced; and the carrying capacity and rigidity are improved.

Disclosed are a combined-type suspension electromagnet for a medium-low-speed maglev train and a manufacturing method of the combined-type suspension electromagnet. The combined-type suspension electromagnet structurally comprises at least one permanent-magnetic suspension component and more than one electromagnetic suspension component and/or hybrid suspension component, and the permanent-magnetic suspension components and the electromagnetic suspension components and/or hybrid suspension components are combined and mounted together through a shared iron core electrode plate. The method includes the following steps: (1), determining structure sizes of permanent magnets in the permanent-magnetic suspension components; (2), designing and determining number of turns of excitation coils and the structure sizes of permanent magnets in the electromagnetic suspension components and/or the hybrid suspension components according to big gap working conditions of normal suspension and fluctuation of the train. The combined-type suspension electromagnet has the advantages of simple structure, low cost, high reliability, convenience for maintaining, low suspension energy consumption and good suspension controlling and adjusting performance.