138 results about "Magnetic modulation" patented technology

The present invention relates to modulated (e.g., magnetically modulated) chemical sensors. In particular, the present invention relates to particles comprising fluorescent indicator dyes and methods of using such particles. Magnetic fields and / or Brownian motion modulate an optical property of the particle to distinguish it from background signals. The present invention thus provides improved methods of detecting a wide variety of analytes in fluids, fluid samples, cells and tissues.

A biosensor utilizing bio-functionalized magnetic nanoparticles is provided. An external magnetic field is applied to a suspension of magnetic nanoparticles. A linearly polarized incident light is applied to the suspension of magnetic nanoparticles. A photocurrent from polarized light scattering by bio-functionalized magnetic nanoparticles in liquid is detected. The magneto-optic sensing technique is applied to a micro-fluidic channel for rapid and sensitive detection with a small sample amount, and subsequent magnetic separation for detoxification. This technique is used for the detection of Brownian relaxation with time sweep as well as frequency sweep. The magneto-optical sensor enables rapidly detecting changes in local dynamic properties of the magnetic nanoparticles in liquids and magnetic modulation of ferromagnetic particles in liquid provides increased signal sensitivity.

The invention relates to a magnetism transmission gear pair of a novel transverse magnetic field, which can be widely applied to wind power generation, electric cars, ship drive and other industrial transmission fields requiring direct drive. The magnetism transmission gear pair is characterized in that a driving wheel and a driven wheel of the magnetism transmission gear pair are of a flat disk shape, 2pr driving wheel permanent magnets 3 are distributed on the driving wheel, and 2ps driven wheel permanent magnets 7 are distributed on the driven wheel; a ferromagnetic magnetic modulation grid 6 playing a role of modulating an air-gap magnetic field is arranged between the driving wheel and the driven wheel, air gaps are reserved between the ferromagnetic magnetic modulation grid 6 and the end surfaces of the driving wheel and the driven wheel, and the ferromagnetic magnetic modulation grid 6, the driving wheel and the driven wheel have no mechanical contact and are distributed along the same axis; the air-gap magnetic field Bg passes through an air-gap plane along a route parallel to a rotation axis to form a transverse magnetic field of the magnetism transmission gear pair; and during working, power speed change transmission without mechanical contact and friction is realized by utilizing a principle of heteropolarity attraction of an N pole and an S pole of a permanent magnet material.

The invention discloses a parallel-serial magnetic path memory motor. The parallel-serial magnetic path memory motor comprises a hybrid permanent-magnet rotor, a stator, an armature winding and a rotation shaft, wherein the armature winding is arranged on the stator, the stator is arranged outside the hybrid permanent-magnet rotor, the hybrid permanent-magnet rotor comprises a rotor core, first permanent magnets, second permanent magnets, third permanent magnets and triangular magnetic obstacles, the first permanent magnets are arranged at the rotor core in a straight-line shape, the triangular magnetic obstacle is arranged between two of the first permanent magnets, the second permanent magnets and the third permanent magnets form V-shaped hybrid permanent magnets, the V-shaped hybrid permanent magnets are symmetrically arranged at two sides of the triangular magnetic obstacles, and the first permanent magnets and the second permanent magnets form series magnetic paths. By the parallel-serial magnetic path memory motor, the problems of narrow series-type magnetic modulation range and demagnetization seriousness by parallel cross coupling in a traditional built-in permanent-magnetmemory motor can be solved, the motor torque density is improved, and the full-working condition running range of the motor can be expanded.

The invention discloses a magnetic flux controllable memory motor online magnetic modulation performance prediction and optimization design method based on a nonlinear equivalent variable magnetic network model. The method includes: (1) setting material characteristics of each part of the motor; (2) establishing a nonlinear equivalent variable magnetic network model; (3) carrying out simulation calculation on the adjustable magnetic material; (4) optimizing motor structure parameters by combining a multi-objective genetic algorithm based on NSGA II with a nonlinear variable magnetic network; (5) changing the magnitude of excitation current, and obtaining an initial feasible non-dominated solution set; and (6) changing the magnitude of the excitation current, and reducing the range of the non-dominated solution set, so that the non-dominated solution set gradually approaches the optimal solution set suitable for multi-mode operation of the memory motor, wherein the target function of all parameter combinations in the preliminary feasible non-dominated solution set is solved again; And finally, obtaining an optimal parameter combination in the parameter set at the front edge of the optimal solution set, and determining the motor structure.

The invention provides a magnetic gear-type composite hub motor. The magnetic gear-type composite hub motor comprises a motor mandrel, an inner stator, a high-speed inner rotor, a magnetic modulation ring, and a low-speed outer rotor, wherein the inner stator, the inner rotor, the magnetic modulation ring, and the outer rotor are arranged around the motor mandrel in sequence, and are sequentially nested along the radial direction of the motor mandrel; the inner stator is fixed in the motor mandrel; the inner rotor is supported by an inner rotor support assembly and can rotate around the motor mandrel; the inner rotor support assembly is arranged on both sides of the inner rotor along the axial direction of the motor mandrel; the magnetic modulation ring is fixed on the motor mandrel through a magnetic modulation ring fixing panel; the magnetic modulation ring fixing panel is arranged on both sides of the magnetic modulation ring along the axial direction of the motor mandrel; the outer rotor is supported by an outer rotor support assembly and can rotate around the motor mandrel; the outer rotor support assembly is arranged on both sides of the outer rotor along the axial direction of the motor mandrel. The magnetic gear-type composite hub motor provided by the invention has high structural strength and rigidity, large rotation accuracy and output torque, is compact in structure, high in efficiency, small in vibration, and is suitable for direct-driven hub motor.

The present invention relates to modulated (e.g., magnetically modulated) chemical sensors. In particular, the present invention relates to particles comprising fluorescent indicator dyes and methods of using such particles. Magnetic fields and / or Brownian motion modulate an optical property of the particle to distinguish it from background signals. The present invention thus provides improved methods of detecting a wide variety of analytes in fluids, fluid samples, cells and tissues.

The invention discloses an acceleration type linear magnetic gear permanent magnet composite motor which comprises a linear magnetic gear and a linear permanent magnet synchronous motor. The linear magnetic gear and the linear permanent magnet synchronous motor are connected in the length direction in series and coupled. The linear magnetic gear comprises a magnetic gear stator, a magnetic modulation sheet and a magnetic gear high-speed rotor. The magnetic modulation sheet is arranged between the magnetic gear stator and the magnetic gear high-speed rotor. A first air gap is formed between the magnetic gear stator and the magnetic modulation sheet. A second air gas is formed between the magnetic modulation sheet and the magnetic gear high-speed rotor. The linear permanent magnet synchronous motor comprises a primary linear permanent magnet motor and a secondary linear permanent magnet motor. A third air gap is formed between the primary linear permanent magnet motor and the secondary linear permanent magnet motor. A magnetic gear stator iron core and a primary iron core are connected in series, coupled and kept to be fixed. According to the structure of the acceleration type linear magnetic gear permanent magnet composite motor, a motor magnetic field is modulated through a magnetic modulation iron core ring, non-contact-type speed changing and thrust transmission are achieved, contact losses are reduced, the power density of the motor is improved, the system size and weight are reduced, and the manufacturing cost is reduced.

A magnetic modulation motor includes an armature, a magnetic induction rotor, and a magnet rotor. The armature is provided with a multi-phase winding with m pole pairs. The magnetic induction rotor includes k magnetic paths. In the magnet rotor, 2n permanent magnets forming a polarity region with n pole pairs are separately and annularly placed. The armature, the magnet rotor, and the magnetic induction rotor are arranged in the order from a radially outer side to a radially inner side. In the magnetic induction rotor, the magnetic path has two ends projecting toward a magnetic flux entry and exit located at an outer diameter face of the magnetic induction rotor, and forms a magnetic flux path between the magnetic flux entry and exit. The magnet rotor includes magnetic flux penetration region magnetically penetrated by magnetic flux between each circumferentially adjacent two permanent magnets.

A magnetic transmission apparatus is disclosed, wherein the magnetic transmission apparatus includes a still part (4), a first rotating shaft (81), a second rotating shaft (82), a first rotating part (1), a second rotating part (2), and a third rotating part (3); the first rotating part (1) is rigidly connected with the first rotating shaft (81); the second rotating part (2), the third rotating part (3) are fixed on the second rotating shaft (82); the first rotating part (1), the second rotating part (2), and the third rotating part (3) are successively distributed along an axial direction; the still part (4) includes a magnetic regulation seat (41) and a magnetic regulation ring (42); the second rotating part (2) is located inside the magnetic regulation ring (42); the first rotating part (1) includes a first iron core (11), a first permanent magnet (12), and a first support part (811); the second rotating part (2) includes a second iron core (21), and a second permanent magnet (22); the third rotating part (3) includes a third iron core (31), a third permanent magnet (32), and a second support part (821); the first iron core (11), the first permanent magnet (12), the magnetic regulation ring (42), the third permanent magnet (32) and the third iron core (31) are successively distributed along the axial direction. The first permanent magnet (12) and the third permanent magnet (32) are magnetized alternately and axially; the second permanent magnet (22) is magnetized alternately radially. The magnetic transmission apparatus has an axially and radially mixed magnetic circuit and can take full advantage of the magnetic modulation space and improve the torque density.