摘要:
The present invention discloses a maglev support structure used for vertical axis disc-type electric machine. The said maglev support structure includes at least two maglev components, of which the first maglev component is composed of an annular upper permanent-magnet component and an annular lower permanent-magnet component, where the upper permanent-magnet component is installed under the upper end cover of the rotor while the lower permanent-magnet component is installed above the stator, with the upper and lower permanent-magnet components being in the opposite magnetization direction and in a state of mutual repulsion, resulting in a pushing force; and the second maglev supporting component is composed of an upper and a lower permanent-magnet components where the upper permanent-magnet component is installed above the lower end cover of the rotor while the lower permanent-magnet component is installed under the stator, with the upper and lower permanent-magnet components being in the opposite magnetization direction and in a state of mutual repulsion, resulting in a pushing force.
摘要:
The invention relates to a coil system for the contactless magnetic navigation of a magnetic body (1) in a work space, wherein the coil system comprises a plurality of coils and a current controller for controlling the respective currents in the plurality of coils. In order to navigate the magnetic body (1) to a variably predeterminable position (P) in the work space, the current controller is designed such that the currents in the plurality of coils are such that the magnetic forces (F 1 , F 2 , F 3 , F 4 ) generated by the currents and acting upon the magnetic body (1) at multiple positions (P 1 , P 2 , P 3 , P 4 ) at the edge of a convex environment (Ω) around the predetermined position (P) are directed into the environment (Ω). The coil system according to the invention has the advantage that a movement of the magnetic body toward a spatial position is achieved without any mechanical movement of the coil system and without a positioning system for determining the position of the magnetic body. The coil system is utilized particularly in a medical device, wherein a magnetic body in the form of a probe is moved in the body of a patient. In this way, fast navigation of the probe in the patient’s body can be achieved without mechanical movements of the patient table or of the coil system.
摘要:
A ferromagnetic force field generator which increases a magnetic force field without adding another superconducting magnet to a commercially sized superconducting magnet and spatially uniforms the magnetic force field. A ferromagnetic force field generator has a disc ferromagnetic material (3) disposed symmetric with respect to the center axis above the equator face inside the hollow of a solenoid superconducting magnet (1) the center axis of which directs vertically, and a ringlike ferromagnetic material (4) symmetric with respect to the center axis above the disc ferromagnetic material without contacting the disc ferromagnetic material (3).
摘要:
A system and method are used to levitate and translate a stage within a chamber using a motor assembly coupled to a balance mass assembly. The balance mass assembly is positioned adjacent the chamber. The motor assembly includes a stator and a coil. One of the stator and the coil are coupled to the stage on a first side of a wall of the chamber. The other of the stator and the coil are coupled to the balance mass assembly on a second side of the wall of the chamber. A magnetic assembly coupled to the stage allows the stage to levitate within the chamber. Once levitated, the stage is translated based on the interaction of the magnets and an energized coil.
摘要:
The motive device (14) includes a motor (26) attached to a magnet chamber (40). The magnet chamber connects to the exterior of the agitator tank (16) and houses a drive magnet (28) and a shaft (30) connecting the motor to the drive magnet. The impeller apparatus (12) generally includes an axial-pumping impeller (22) attached to a driven magnet (32). The impeller is supported by at least one post so that it is held away from the bottom of the tank. The impeller is attached via a post and bearing structure (34) to the driven magnet. The post and bearing structure includes a sleeve (38) coaxial with a post (36), and which sleeve can rotate around the post. The sleeve is attached at one end to the driven magnet and the other end to the impeller.
摘要:
A system and method are used to levitate and translate a stage within a chamber using a motor assembly coupled to a balance mass assembly. The balance mass assembly is positioned adjacent the chamber. The motor assembly includes a stator and a coil. One of the stator and the coil are coupled to the stage on a first side of a wall of the chamber. The other of the stator and the coil are coupled to the balance mass assembly on a second side of the wall of the chamber. A magnetic assembly coupled to the stage allows the stage to levitate within the chamber. Once levitated, the stage is translated based on the interaction of the magnets and an energized coil.
摘要:
Magnetic actuator for controlling a magnetic force on a load, including a first, second, and third magnetic element, the first, second and third element having a first, second, and third position respectively, the first and the second element being adjacent to each other separated by a first gap in a first direction, the second and the third element being adjacent to each other separated by a second gap in a second direction, the magnetic force being caused by a magnetic interaction of the first, second and third magnetic elements at their respective first, second and third position, wherein the magnetic actuator includes a displacer attached to at least two of the first, second and third elements, the displacer being arranged for changing the magnetic interaction of the first, second and third elements by relatively displacing at least one of the first, second and third elements from it's respective position.
摘要:
A magnetic levitation control apparatus comprises a pair of electromagnets for holding a levitated body having a magnetic body in the levitated state. A signal source for supplying a voltage signal of a frequency on a level such that enables the electromagnets to function as the position sensor, wherein a control voltage signal for controlling the magnetic attraction of the electromagnets is superimposed on the voltage signal. A circuit differentially supplies the voltage signal to the pair of electromagnets to form a position signal of the levitated body from an add signal of currents respectively from the electromagnets, and a circuit detects a control current of the electromagnets from a subtraction signal of currents respectively from the electromagnets. A controller generates a control voltage signal of the electromagnets from the detected position signal of the levitated body and, in addition, corrects the position signal detected from the detected control current of the electromagnets.
摘要:
A system for pumping or mixing a fluid using a levitating, rotating pumping or mixing element and various other components for use in a pumping or mixing system as disclosed. The pumping or mixing element is placed in a fluid-containing vessel in close proximity to a superconducting element. A cooling source thermally linked to the superconducting element provides the necessary cooking to induce levitation in the pumping or mixing element. The superconducting element may be thermally isolated, such that the pumping or mixing element, the vessel, and any fluid contained therein are not exposed to the cold temperatures required to produce the desired superconductive effects and the resulting levitation. By using means external to the vessel to rotate and/or stabilize the pumping or mixing element levitating in the fluid, including possibly rotating the superconducting element itself or moving it relative to the vessel, the desired effective pumping or mixing action may be provided.
摘要:
Servo control using ferromagnetic core material and electrical windings is based on monitoring of winding currents and voltages and inference of: magnetic flux, a force indication; and a magnetic gap, a position indication. The third order nonlinear servo control is split into nested control loops: a fast non-linear first order inner loop (1636) causing flux to track a target by varying a voltage output; and a slower almost linear second-order outer loop (1650, 1670, 1680) causing magnetic gap to track a target by controlling the flux target of the inner loop.