223 results about "Magnetic levitation system" patented technology

A magnetic levitation system for supporting an object against gravity by a supporting force includes a permanent-magnet dipole aligned in a vertical position and coupled to the object, a supporting-field generator and a stabilization system. The supporting-field generator generates a supporting force on the permanent-magnet dipole via a supporting field. The supporting field is a two-dimensional or three-dimensional magnetic quadrupole field so that the supporting force is independent of a position of the dipole. The stabilization system constrains the dipole against movements in at least one horizontal direction, and includes a diamagnetic element coupled to the dipole and arranged below the dipole, and a stabilizing-field generator generating a second two-dimensional or three-dimensional stabilizing field to restore said diamagnetic element to a position where the field strength of the stabilizing field has a local minimum.

The invention discloses a magnetic levitation device comprising a floater and a magnetic levitation base, a power electromagnet is arranged on the magnetic levitation base, a control instruction for controlling the state of the floater is sent to a micro-control unit through a state control module, the power electromagnet is driven to generate attractive force or repulsion force to realize the rising, falling, or rotation of the floater. Compared with the prior art, the magnetic levitation device can freely control the state of the floater, such as rising, falling, or rotation, based on the user's control instruction, and the user experience is good.

The invention discloses an F sectional steel connecting structure for a medium-low-speed magnetic levitation system. The F sectional steel connecting structure comprises a wing plate lower connecting plate, a clamp plate, an outer leg side connecting plate and two sections of F sectional steel, wherein each section of F sectional steel is provided with an inner leg, an outer leg, a web plate and a wing plate, the two ends of the wing plate lower connecting plate are respectively connected with the wing plates arranged at the two sides through first screw bolts and the clamp plate, a groove longitudinally extending along the line is formed in the side wall of each outer leg, the outer leg side connecting plate is provided with a long slot groove at one side near the clamp plate, and is provided with a round hole at one side leaving far away from the clamp plate, and the outer side connecting plate is fixedly arranged in the groove through second screw bolts. The F sectional steel connecting structure for the medium-low-speed magnetic levitation system has the advantages that the structure is simple, the processing cost is low, the installation is convenient, and the maintenance is easy.

A magnetic lifting device is described. The magnetic lifting device can be configured to generate magnetic lift using a moving magnetic field to generate an eddy current effect in conductive substrate beneath the device. In one embodiment, the moving magnetic field can be generated by a rotor with arrangement of permanent magnets which is driven by a motor. In operation, the rotor can be spun up from rest to above a threshold velocity, which causes the magnetic lifting device to rise up from the conductive substrate, hover in place in free flight and move from location to location. In free flight, the magnetic lifting device can be configured to carry a payload, such as a person.

The invention provides a radial magnetic bearing electrical vortex sensor integrated structure for a magnetic levitation high-speed electric machine, consisting of four radial displacement sensor probes for detecting radial displacement signals, a permanent magnet biased hybrid magnetic bearing controlling the levitation of a rotor and an external sensor signal processing circuit, wherein the sensor probes are integrated in the permanent magnet biased hybrid magnetic bearing, and sensor probe preamplifier circuits are integrated together to be put in a control box of a magnetic levitation electric machine to be separated from the sensor probes. According to the radial magnetic bearing electrical vortex sensor, the space of the magnetic levitation electric machine can be greatly saved, the work efficiency of the magnetic levitation electric machine can be improved, the influence of the temperature drift to the sensor can be reduced, the stability of the magnetic levitation electric machine can be improved, the applicable place of the magnetic levitation electric machine can be enlarged, and the whole performance of the magnetic levitation electric machine can be prominently improved.

A flywheel energy storage device includes the Halbach Motor/Generator with rolling biphasic coil control, continuously variable torque transfer via magnetic induction and a reluctance magnetic levitation system known as the Axial-Loading Magnetic Reluctance Device. Electric energy input turns the magnetically coupled rotors of the Halbach motor, and torque is transferred to a flywheel through a copper cylinder variably inserted between the Halbach magnet rotors. In idle mode, the energy is stored kinetically in the spinning flywheel, which is levitated by a permanent magnet bearing. Electric energy output is achieved by transferring torque from the flywheel through the copper cylinder to the rotors of the Halbach Generator by magnetic induction. Rolling biphasic motor control includes dividing Halbach motor coils into increments, then energizing groups of contiguous increments into virtual coils, which revolve in tandem with the magnet rotors so to achieve continuous and optimal torque.

The present invention discloses an F rail seam structure, which is designed by adopting the normal conducting electromagnetic levitation technology and provided by a low-speed magnetic levitation system for the levitation and guiding of vehicles. The F rail seam structure has the following characteristics: the end of a F rail is milled into an embedding surface, so that a convex splicing part is formed; the end of the convex splicing part is shaped like a circular arc (or planar); circular arc-shaped (or planar) end surfaces are formed on the convex splicing part and a step formed on the upper and the lower ends of the body of the F rail; and a concave part and a circular arc-shaped (or planar) end surface which match the circular arc-shaped (or planar) end surfaces on the convex splicing part and the step are formed on the end surface of the other end of the F rail. While still ensuring rail seam expansion adjustment, vertical and lateral positioning and the rail expansion adjustment of a turnout, the F rail seam structure is simplified and can be easily centered in the process of machining and installation. The F rail seam structure not only can ensure the centering adjustment of rails but also can adjust the temperature-difference expansion of the rails and realize the stretching adjustment of the turning of the turnout. The F rail seam structure is generally used in a passive guiding type low-speed magnetic levitation system.

The invention discloses a loop test track for a vacuum pipeline high-temperature superconducting magnetic levitation train. The loop test track is formed by a magnetic levitation system and a vacuum pipeline (1), wherein the magnetic levitation system is composed of a linear motor (2), a magnetic suspension track (3) and a magnetic levitation train. The magnetic levitation system is nested in the vacuum pipeline (1), so as to form an airtight negative pressure pipeline environment for realizing low resistance operation of the superconducting magnetic levitation train and the vacuum pipeline route. The loop test track disclosed by the invention integrates the superconducting magnetic train and the vacuum pipeline route, displays an advanced track traffic tool, and satisfies the demands of a loop test track for a manned high-temperature superconducting magnetic levitation train, a vacuum pipeline high-temperature superconducting magnetic levitation running test and dynamic characteristic study of high-temperature superconducting magnetic levitation system.

A magnetic levitation flywheel magnetic bearing digital control device which is used in initiative control for the magnetic levitation flywheel magnetic bearing system comprises a interface circuit, a A/D conversion chip, a FPGA module, wherein the interface circuit and the chip get the bit shift single data, the coil current data, the rate signal data of the magnetic bearing rotor; the FPGA module creates a controlling quantity under the hardware assembler of the FPGA chip; wherein the FRGA export to the power amplifier ring basing on the association of the controlling quantity and the current single export and basing on the modulation of PWM, the FPGA module create a control current for the magnetic bearing coil to reach the initiative control of the magnetic levitation flywheel magnetic bearing system. The invention has high reliability, integration, low power consumption.

The invention discloses a sensor-free charging control method of a magnetic levitation energy storage flywheel. The control method comprises the steps of 1, controlling a magnetic levitation system to stably work; 2, measuring three-phase static currents I, I and I<c> of a motor by a Hall current sensor mounted at the input end of the motor; 3, inputting the three-phase static currents I, I and I<c> to a three-phase static to two-phase static conversion CLARKE module; 4, performing open loop and closed loop control switching according to a relationship between a rotating speed estimation value theta<est>and a set threshold theta; 5, obtaining an angle position of a rotor; 6, inputting an angle position simulation value theta<sim> and the estimation value theta<est> to a rotating speed estimation unit so as to obtain a rotating speed estimation value nest of the rotor; 7, inputting I<alpha>, I<beta> and the angle position of the rotor to a two-phase static to two-phase rotating conversion PARK module; 8, performing closed loop feedback control; 9, inputting V<d> and V<q> to a two-phase static to two-phase rotating conversion IPARK module; and 10, performing vector control according to V<alpha> and V<beta> obtained in the step 9. The method is used for sensor-free charging control of the magnetic levitation energy storage flywheel.