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156 results about "Alnico" patented technology

Alnico is a family of iron alloys which in addition to iron are composed primarily of aluminium (Al), nickel (Ni) and cobalt (Co), hence acronym al-ni-co. They also include copper, and sometimes titanium. Alnico alloys are ferromagnetic, and are used to make permanent magnets. Before the development of rare-earth magnets in the 1970s, they were the strongest type of permanent magnet. Other trade names for alloys in this family are: Alni, Alcomax, Hycomax, Columax, and Ticonal.

Novel electric vehicle drive system of integrating charger functions

The invention discloses a novel electric vehicle drive system of integrating charger functions. A motor driver and a charger share a power electronic conversion circuit between energy storage units, and also share a motor winding inductor, so that an electric vehicle motor driver and an on-board charger are organically integrated into a whole; and the limitation of an electric vehicle on the space weight is avoided. Double three-phase motors meet the low-voltage and high-current design requirements of electric vehicle motors, have relatively small torque ripples, meet the comfortable and smooth operating requirements of the electric vehicle, have relatively good fault tolerant capability and meet the high-reliability operating requirements of the electric vehicle. Permanent magnets NdFeB and AlNiCo are organically compounded on a rotor, so that the novel electric vehicle drive system has the advantage that the magnetic field of the permanent magnet AlNiCo is easy to adjust; the characteristic of high energy density of the permanent magnet NdFeB is reserved; the large starting torque and flux-weakening speed expansion operating requirements of the electric vehicle are met; the double three-phase windings can provide a torque current and a magnetization current respectively; and the magnetization efficiency is relatively high.
Owner:SOUTHEAST UNIV

Hybrid excitation-type stator partition-type hybrid permanent magnet flux switching memory motor

The invention discloses a hybrid excitation-type stator partition-type hybrid permanent magnet flux switching memory motor, which comprises an outer stator, an inner partition stator and a middle rotor, wherein the inner partition stator has a structure of an inner layer and an outer layer closely attached together, the outer layer is formed by an inner stator iron core and NdFeB permanent magnets, the NdFeB permanent magnets are uniformly embedded in the inner stator iron core along the circumferential direction, the NdFeB permanent magnets are magnetized tangentially, and the magnetizing directions of two adjacent NdFeB permanent magnets are opposite; and the inner layer is formed by pulse magnetizing windings and AlNiCo permanent magnets capable of being magnetized and demagnetized in an online mode, the AlNiCo permanent magnets are uniformly arranged along the circumferential direction, an inner stator groove is arranged between adjacent two AlNiCo permanent magnets, and the pulse magnetizing windings serially connected from beginning to end in sequence are placed in the inner stator grooves and are wound on the AlNiCo permanent magnets. Thus, under the same motor size, the amount of permanent magnets and the amount of armature windings can be increased to enhance torque density, the magnetic strength of the AlNiCo permanent magnets can be adjusted in an online mode, and a wide speed regulation range is provided.
Owner:JIANGSU UNIV

Device for calibrating high-speed motion measuring instrument

The invention discloses a high-speed motion measuring instrument calibrating device capable of conveniently and accurately calibrating and measuring a conventional high-speed motion measuring device. The device comprises a worktable of which the upper surface is a smooth horizontal plane; two sides of the upper surface are provided with a bearing respectively; a permanent alnico thrust bar is horizontally arranged between the two bearings; the permanent alnico thrust bar is sleeved with a linear motor rotor; the lower end of the linear motor rotor is provided with an air floatation bearing which forms non-contact type supporting with the upper surface of the worktable; the device also comprises a metal strip raster measuring system, wherein a metal strip raster read head is arranged on the lower end face of the linear motor rotor; a metal strip raster is arranged on the upper surface of the worktable and corresponds to the metal strip raster read head; the device also comprises a microcomputer control system which is connected with the metal strip raster measuring system and the linear motor rotor respectively and can read a measuring result of the metal strip raster measuring system and control the motion of the linear motor rotor.
Owner:CHONGQING JIANSHE IND GRP +1

Novel direct current driving turntable structure

The invention relates to a novel rotary table driven by a DC motor. The motor stator is mounted on a frame, windings and an iron core are mounted on the inner side of the stator, and a commutator is arranged at the lower end of the windings. The wire inlet terminal and the brush of the conducting ring are fixed on the lower end of the stator; the motor stator is fixed on the main shaft; the worktable face is connected to the main shaft by bolts; an alnico is fixed on the stator, the brush with a conducting ring is mounted on the bottom of the stator by a frame; the brush of the commutator is mounted on the brush frame provided with a conducting ring, and the brush of the commutator contacts with the commutator; and the conducting-ring brush contacts with the conducting ring arranged on the brush frame provided with a conducting ring. The part between the main shaft and the frame is supported by a thrust ball bearing and an angular-contact ball bearing, and the part between the worktable face connected with the main shaft and the frame is supported by a tapered roller bearing. The rotary table with such structure has the advantages of that the rotor has small moment of inertia, the fluctuation of moment is small, the speed is low, the performance is sound, and the cost is low; particularly when load acceleration requires relatively high control accuracy, such structure is easy to meet the technical requirements of the rotary table and reduce the cost.
Owner:AVIC BEIJING CHANGCHENG AVIATION MEASUREMENT & CONTROL TECH INST +1

Production method of radiation-orienting magnet ring

The invention relates to a manufacturing method for a radiation-oriented magnetic ring, belonging to the technical field of the rare earth permanent magnet material. Aiming at the disadvantage that the radiation-oriented magnetic ring prepared by the prior art is easy to be broken up, the invention radiates, orients and molds anisotropic nanocrystal magnetic particles with powder particle size of 1 to 100 micron under a magnetic field, the anisotropic nanocrystal magnetic particles are pressurized and sintered with discharge plasmas or a direct current, the temperature is 500 to 960 DEG C, the time is 0.5 to 10.0 minutes, the pressure is 30 to 200 MPa, after the sintering, the temperature is rapidly reduced; magnetic powder is single alloy or double alloy (at least one kind of magnetic powder is anisotropic nanocrystal), the alloy is chosen from R1T5, R1T7, R2T17 R2T14M1, AlNiCo, FeCrCo, permanent magnetic ferrite and soft magnetic alloy with high saturation magnetization. The manufacturing method of the radiation-oriented magnetic ring is also suitable to prepare micron crystal R1T5, R2T17, R2T14M1, AlNiCo, FeCrCo radiation-oriented magnetic rings, the powder particle size is 1 to 20 micron, the magnetic ring is at least required to be thermally treated for one time. The finished product rate of the magnetic ring is higher.
Owner:NINGBO UNIV

Manufacture process and application technical process of energy-saving and emission-reducing high-gradient magnetic separating machine with ultrastrong magnetic field

The invention provides a manufacture process and an application technical process of a high-gradient magnetic separating machine with an ultrastrong magnetic field. Set magnetic separating magnet materials comprise ferrite, alnico, SmFeN and a rare earth permanent magnet material. A magnetic separating chamber is made of non-magnet-conducting materials, a slurry outlet and a slurry inlet are respectively arranged on the upper part and the lower part of the magnetic separating chamber, and magnetic separating media put in the separating chamber are steel wool. An emission-reducing and energy-saving ball mill saves energy and reduces the emission of exhaust gas. Multiple times of fine separation are adopted in the technical process for improving iron content. After tailings are ground by using the ball mill to reduce the iron content in the tailings, the tailings enter a sorting machine, and a high-gradient magnetic separating technical process of stainless steel wool is adopted for treating waste water. The magnetic separation and mine sewage treatment technical indexes of the process provided by the invention reach an advanced level.
Owner:潘树明

Anti-podal permanent magnetic high-intensity magnetic separator

An anti-podal permanent magnetic high-intensity magnetic separator is characterized in that the magnetic separator comprises a frame (1), a power vibration mechanism arranged at the middle part of the frame, a permanent magnetic system arranged at the top of the frame, and a vibration supporting frame (18) which is arranged above the permanent magnetic system and is used for installing a feeding funnel (10) and a magnetism-collecting medium box (8); the vibration supporting frame is combined with the power vibration mechanism by a connecting and supporting rod (6); the permanent magnetic system is characterized in that a plurality of axial permanent magnetic alnicos (20) with the same specification are superposed by an extrusion way in two groups and arranged at two sides of the magnetism-collecting medium box (8) in the horizontal direction, the polarity arrangement of each group is N-S-N-S-N-S or S-N-S-N-S-N, the external surfaces of the permanent magnetic alnicos form an antipodal magnetic separation space and a closed magnetic circuit, and the internal surface of each group of the permanent magnetic alnico is clamped between two bakelite boards (19) after being extruded, assembled and positioned precisely; and the Bakelite boards (19) are fixedly arranged on a chute vibration board (12) and a sliding plate (21) by a connecting bolt.
Owner:HENAN POLYTECHNIC UNIV

Cold crucible for directional solidification of magnetic AlNiCo alloy

The invention discloses a cold crucible for directional solidification of magnetic AlNiCo alloy, relating to a cold crucible. The invention aims to solve the problems that when the existing cold crucible is used for directional solidification of magnetic alloy, the utilization rate of energy is low, and the side heat dissipation cannot have well thermal compensation, thereby resulting in discontinuous columnar crystals. The outer wall of the upper half of the cold crucible is divided into eight cylinders with arc petal-shaped sections, an opening seam is arranged between every two adjacent cylinders with the arc petal-shaped sections, the arc radius of each arc petal-shaped cylinder is 9 mm, the opening seam length of the opening seam is 4 mm, the opening seam width is 0.5 mm, a through hole is arranged inside each cylinder with the arc petal-shaped section, every odd number of cooling connection water pipe in eight cooling connection water pipes is communicated with a water inlet pipe, every even number of cooling connection water pipe in the eight cooling connection water pipes is communicated with a water outlet pipe, the height of the main body of the crucible is 110mm-130mm, and the wall thickness of the main body of the crucible is 12mm-15mm. The cold crucible is suitable for directional solidification of magnetic alloy.
Owner:HARBIN INST OF TECH

Permanent-magnet switch flux-linkage generator of three-dimensional magnetic structure

The invention relates to a permanent-magnet switch flux-linkage generator of a three-dimensional magnetic structure, belonging to the field of electric motors and aiming to solve the problems of low power density, complex winding construction, difficult insulation manufacture, and the like which are existed in a low-speed permanent-magnet generator. A single phase generator of the invention has the technical scheme that two stator cores are arranged along the axial direction of the outer surface of a main shaft and are connected by a magnetic-inductive-connection toroidal core to form a toroidal groove in which a stator winding is arranged, salient poles on the two stator cores are mutually staggered a distance of half stator, an outer rotor consists of a rotor yoke and two rows of alnico arrays arranged at the inner surface of the rotor yoke, one row of the alnico arrays is respectively arranged in the same level with one of the stator cores, and the axial center line of the two stator cores and the two rows of alnico arrays are overlapped. A two-phase generator of the invention consists of two single phase generators, rotor yoke connection pieces, supporting rings and main shaft connection pieces, and the two single phase generators are of quadrature winding structures. On the basis of the two-phase generator, by distribution of number of windings and connection of the windings, a three-phase generator can be formed.
Owner:HARBIN INST OF TECH
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