摘要:
The invention relates to a magnetic yoke (10) having a magnet (12) comprising a magnetizing device (14), on which a first yoke arm (18a) and a second yoke arm (18b) are disposed such that the magnet (12) and the two yoke arms (18a,18b) span a yoke intermediate space (20) extending from a front to a rear of the magnetic yoke; and a first pole shoe (22a) disposed on the first yoke arm (18a), and a second pole shoe (22b) disposed on the second yoke arm (18b), between which a yoke gap (24) is present; wherein the first pole shoe (22a) has a first width (b1) at a first end (40a) on the front of the magnetic yoke (10) parallel to the magnetizing device (14) of the magnet (12), and second width (b2), which is different from the first width (b1), at a second end (42a) positioned opposite of the first end (40a) at the rear of the magnetic yoke (10) parallel to the magnetizing device (14) of the magnet (12).
摘要:
The present invention provides an optical in-fiber chiral fiber isolator, capable of transmitting a signal of a predetermined optical polarization in a forward direction therethrough, while rejecting all signals traveling in a backward direction therethrough, and a method of fabrication thereof. In one exemplary embodiment, the inventive optical chiral fiber isolator includes a chiral magneto-optical fiber having a helical pitch profile, a birefringence profile, and an effective Verdet constant profile, at least a portion of which is exposed to a magnetic field of a predetermined magnetic field profile (generated by a proximal magnetic field source), where the magnetic field profile, the chiral pitch profile, the birefringence profile, and the effective Verdet constant profile are selected and configured such that the inventive isolator is capable of transmitting a signal of a predetermined optical polarization in a direction from its input end toward its output end, and to reject all signals in a direction from its output end to its input end.
摘要:
A permanent magnet assembly is disclosed that is adapted to provide a magnetic field across an arc-shaped gap. Such a permanent magnet assembly can be used, for example, to provide a time-varying magnetic field to an annular region.
摘要:
A combined motor-battery system comprising an electric power source adapted to convert self-originating electrical current to mechanical power utilizing a set of common functional structures. Preferred embodiments include an electrochemical cell comprising field reactive electrodes that directly produce extractable mechanical forces in the presence of a magnetic field.
摘要:
This invention refers to a encoder ring for sensors, also known as the gear wheel, pertaining to the field of sensors, which has been developed to allow more possibilities of application, especially in the automotive industry, optimized functioning and other benefits in relation to the conventional rings, comprising a ring-like body (11) made of polymeric material or similar injected provided with load of ferromagnetic material, or body (11") made of polymeric material injected without load of ferromagnetic material and provided with a coating layer (17) of ferromagnetic material, or body (11") without load of ferromagnetic material and provided with a peripheral provided with sections with load (12"), sections without load (13") and optionally a larger section without load (14") of ferromagnetic material.
摘要:
The present invention provides miniaturization of brushless motors and brush motors used in electric devices, a ring magnet which simultaneously achieves both high torque and a reduction in cogging torque, a ring magnet with yoke, and a brushless motor. The thin hybrid magnetized ring magnet of the present invention is structured of, in a ring magnet comprised of a plurality of magnetic poles, a radially magnetized main pole and an interface for which the interface of the adjoining main pole is polar anisotropic. When the thin hybrid magnetized ring magnet structured in this manner is applied to a brushless motor, in the case of radial magnetizing, the abrupt change in magnetic flux of the interface between the magnetic poles becomes smooth and cogging torque is greatly reduced due to polar anisotropic magnetization of the interface. At the same time, by polar anisotropically magnetizing the interface between the magnetic poles, magnetic flux is concentrated on the radially magnetized main pole, and in comparison to only radial magnetization, maximum surface magnetic flux improves and it is possible to attain high torque.
摘要:
The invention relates to a Faraday rotator for a Faraday isolator (10), comprising an entrance polarizer, an exit polarizer, and an interposed cylindrical optical crystal (13) that is arranged symmetrically to the axis of symmetry (x). The rotator further comprises an upright hollow cylinder (11) produced from an axially magnetized permanent-magnetic material, which encloses the crystal. The magnetic field of said material extends in a hollow space (12) parallel to the axis of symmetry that extends in only one direction from the north pole to the south pole. One terminal magnet (16, 17) each follows the two front faces (14) in the plane defined by the y and z direction which is perpendicular to the axis of symmetry. Said terminal magnet is configured as a hollow, upright cylinder and has a through-opening (18) in the prolongation of the axis of symmetry. The Faraday rotator according to the invention is characterized in that every terminal magnet is, at least in some sections, magnetized in a substantially radial manner with respect to the axis of symmetry. One of the two terminal magnets is radially magnetized from the inside to the outside and the other terminal magnet is radially magnetized from the outside to the inside. The hollow cylinder, with its north pole, adjoins the terminal magnet which is magnetized from the inside to the outside, and with its south pole it adjoins the terminal magnet which is magnetized from the outside to the inside.
摘要:
Stator cores for a homo-polar magnetic bearing, wherein toothed ends of stator cores around a rotor form N poles and S poles adjacent in the axial direction, and the method of manufacturing them. The stator core 10 is provided with protrusions 11 of adjacent N and S poles extended circumferentially so as to be in contact with or in close proximity to each other, and is composed of U-shaped laminated steel sheets interleaved with an insulating material, of which the center side is open when viewed from the centerline side. In addition, the core is composed of a first yoke, a second yoke and a stem unit that is a magnetic body placed and fixed between the yokes, and at least the stem unit is composed of a magnetic material powder, solidified in resin.
摘要:
Stator cores for a homo-polar magnetic bearing, wherein toothed ends of stator cores around a rotor form N poles and S poles adjacent in the axial direction, and the method of manufacturing them. The stator core 10 is provided with protrusions 11 of adjacent N and S poles extended circumferentially so as to be in contact with or in close proximity to each other, and is composed of U-shaped laminated steel sheets interleaved with an insulating material, of which the center side is open when viewed from the centerline side. In addition, the core is composed of a first yoke, a second yoke and a stem unit that is a magnetic body placed and fixed between the yokes, and at least the stem unit is composed of a magnetic material powder, solidified in resin.