60results about How to "Good magnetic isolation effect" patented technology

The invention discloses a magnetic isolation sheet applied to wireless charging and near field communication (NFC). The magnetic isolation sheet comprises at least one magnetic isolation unit, whereinthe magnetic isolation unit comprises a soft magnetic strip and a double-side adhesive tape, wherein the soft magnetic strip is of a sheet structure with two exposed surfaces, the double-side adhesive tape covers one of the exposed surfaces, and the other exposed surface of the soft magnetic strip is pressed to form a mesh-shaped line. The invention also discloses a fabrication process of the magnetic isolation sheet applied to wireless charging and NFC. The fabrication process comprises the steps of constructing a magnetic isolation unit, in which the double-side adhesive tape is pasted ontoone of the exposed surfaces of the soft magnetic strip by taking the soft magnetic strip of the sheet structure with the two exposed surfaces as an element, and the other exposed surface of the softmagnetic strip is pressed to form the mesh-shaped line; and constructing the magnetic isolation sheet. The magnetic isolation sheet applied to wireless charging and NFC, fabricated by the fabricationprocess has the advantages of thin thickness, good magnetic isolation capability, high charging efficiency, NFC working frequency stability and high product stability, and the process and the materialcost are greatly reduced.

The invention relates to a modularization disc multi-phase permanent magnet synchronous motor based on single-layer and double-layer mixed windings and belongs to the field of permanent magnet motors. The modularization disc multi-phase permanent magnet synchronous motor aims at solving the problems that when faults such as winding short circuits occur in a conventional disc multi-phase permanent magnet synchronous motor, the fault isolation difficulty is high, and the motor modularization design difficulty is high due to the high interphase electromagnetic coupling degree. The modularization disc multi-phase permanent magnet synchronous motor comprises a main shaft, a bearing, a motor shell, one or two stators and a disc permanent rotor, wherein the stators and the disc permanent rotor are arranged in the motor shell, each stator is formed by splicing 2n+1 stator modules, each stator module comprises 2n concentrated windings and a stator iron core, each stator iron core is provided with 2n+1 stator grooves, and one concentrated winding is wound on each armature tooth. Every two adjacent concentrated windings are identical in number of turns and opposite in winding direction. The disc permanent rotor comprises a disc rotor iron core and a plurality of permanent magnets, wherein the permanent magnets carry out magnetizing in the axial direction, and the magnetizing directions of the permanent magnets are opposite.

The invention provides a composite laminated magnetic material structure for electromagnetic shielding and a preparation method thereof. The composite laminated magnetic material structure for electromagnetic shielding comprises a soft magnetic alloy steel strip material structure and a ferrite magnetic material layer or a magnetic power adhesive layer, wherein the soft magnetic alloy steel stripmaterial structure comprises at least one soft magnetic alloy steel strip material layer; and the ferrite magnetic material layer or the magnetic power adhesive layer are attached to the surface of the soft magnetic alloy steel strip material structure. The composite laminated magnetic material structure for electromagnetic shielding is a composite laminated structure comprising the soft magneticalloy steel strip material layer and the ferrite magnetic material layer or the magnetic power adhesive layer, thereby being capable of integrating performance advantages of the two materials, havingan excellent magnetic isolating effect, reducing a problem of heating energy consumption, greatly expanding the application frequency (100kHz-20MHz) of the magnetic material, being capable of simultaneously meeting electromagnetic shielding requirements of wireless charging such as Qi and A4WP, and having important significance for improving the charging efficiency and the charging distance.

The invention discloses a brake system-used brushless motor rotor punching sheet structure, which comprises a rotor punching sheet. The circle center of the rotor punching sheet is provided with a rotating shaft groove; the periphery of the rotating shaft groove of the rotor punching sheet is uniformly provided with a plurality of magnetic steel grooves along a circumferential direction; a magnetic isolation groove is arranged at each magnetic steel groove and at the outer edge of the rotor punching sheet; the included angle between the center line of the magnetic isolation groove and the magnetic line of the rotor punching piece is 0 DEG; and a magnetic isolation filling block is arranged in the magnetic isolation groove. The a-axis equivalent reluctance of the motor can be increased, andthe brake system-used permanent magnet brushless motor parameter nonlinear influences caused by cross coupling of d-axis and a-axis magnetic circuits can be reduced.

The invention provides an electric machine rotor and an electric machine. A motor rotor includes a rotor core and a permanent magnet, the rotor core is provided with a plurality of claw-shaped mounting grooves in the circumferential direction, The claw-shaped mounting groove comprises a tail magnetic isolation groove and a plurality of long-bar grooves, wherein the long-bar grooves extend along the inner and outer directions of the rotor core, one end of the long-bar grooves close to the inner side of the rotor core is communicated with the tail magnetic isolation groove, the long-bar groovesare located on the side of the tail magnetic isolation groove away from the center of the rotor of the motor, and permanent magnets are arranged in each long-bar groove. The invention adopts a claw-shaped mounting groove to mount a permanent magnet, and the permanent magnet is divided into a plurality of pieces and installed in the claw-shaped mounting groove, so that the thickness of the permanent magnet can be reduced and the magnetization difficulty of the permanent magnet can be reduced. In addition, the surface area of the permanent magnet in the claw-shaped mounting groove in the invention is improved, which can remarkably improve the magnetic convergence ability of the motor rotor, thereby improving the torque density of the motor rotor, and is particularly suitable for improving the magnetic convergence ability of the motor rotor with a small pole number.

The invention discloses a shielded coil module and a preparation method thereof. The shielded coil module comprises a base material, a coil on the surface of the base surface, an insulating layer on the coil, and a shielding material layer and a heat dissipating layer which are arranged on the surface of the insulating layer in a covered manner, wherein the base material comprises a PI base material and an EMI microwave absorbing material or a PI single-faced adhesive; if the base material comprises the PI base material and the EMI microwave absorbing material, the coil and the insulating layer are distributed on two sides of the base material to form a double-faced plate, the shielding material layer and the heat dissipating layer are arranged on one face of the double-faced plate and arepositioned below a battery panel; if the base material comprises the PI single-faced adhesive, the coil and the insulating layer are positioned on the side without adhesive to form a single-faced plate, and the shielding material layer and the heat dissipating layer are positioned below the battery panel. The shielded coil module is high in integration level, thin in thickness, good in magnetismisolating capacity and relatively low in working temperature, so that the cost is greatly saved.

The invention relates to a magnetic steel installation tooling for an electro-hydraulic servo valve of a hydraulic industry, comprising a pilot valve body (1), a nozzle body (2), an intermediate transition body (5), a magnetic seat (7), magnetic steel (8) and a plugging block (9), wherein the intermediate transition body (5) is installed on the pilot valve body (1), and the center line position of the pilot valve body (1) and the intermediate transition body (5) is provided with the nozzle body (2) and a jet pipe (6) in sequence from bottom to top; the nozzle body (2) is connected with the jet pipe (6) through screw threads, the outer side of the jet pipe (6) is provided with a duct (3), and a bushing (4) is sleeved outside the duct (3); the upper part of the intermediate transition body (5) is connected with the magnetic seat (7) through screws, and the magnetic seat (7) is in an L shape and is in bilateral symmetry; the magnetic steel (8) which is fixed through a bolt is stuck to the inner side surface of the sort side of the L shape; and the plugging block (9) is installed among the magnetic steel (8). The invention has the advantages of convenience for operation, reliable positioning and high production efficiency.

The invention relates to the technical field of sound systems, in particular to a sound box system. A sound box body in the sound box system adopts an electromagnet to levitate a loudspeaker, and foot stands are hollow stand columns filled with cast iron powder. The vibration of the sound box system is smaller and the made sound quality is better.

The invention discloses a rotor permanent magnet type hybrid excitation axial flux switching permanent magnet motor, and belongs to the field of hybrid excitation synchronous motors. The motor comprises a first stator, a rotor and a second stator arranged in a coaxial manner, the rotor is clamped between the first stator and the second stator, each stator is formed by six E-type iron cores, six centralized armature windings, and six centralized excitation windings, and the rotor is formed by ten pairs of rotor poles and ten aluminium-nickel-cobalt permanent magnets. According to the motor, theaxial length is short, the structure is compact, the size is small, and the power and torque densities can be increased; the aluminium-nickel-cobalt permanent magnets are arranged on the rotor so that the torque output capability is great, and the overload capability of the motor is improved; the torque ripple is small, the dynamic and steady-state performances of the system are enhanced, and theoperation is more stable; the reactance of armature reaction is low, an excitation magnetic field and a permanent magnetic field are in a parallel connection relation, and the magnetic adjustment isflexible and convenient; and the permanent magnets are located on the rotor so that a stator magnetic circuit is not easily saturated, and the constant-power speed regulation range of the motor is greatly extended.

The invention discloses an axial magnetic flow modularized multi-phase motor having a high magnetic isolation capacity, belongs to the field of motors, and aims to solve the problem of high fault-tolerant control difficulty in case of short circuit of one phase of winding in the conventional multi-phase permanent magnet synchronous motor and the problem of badness to fault isolation and modularized structural design due to dispersed distribution of a winding space. The axial magnetic flow modularized multi-phase motor comprises two modularized stators, a disk-type rotor, a shell and a main shaft, wherein the two modularized stators and the disk-type rotor are arranged inside the shell; one modularized stator, the disk-type rotor and the other modularized stator are arranged in sequence on the main shaft in an axial direction; air gaps are formed between the two modularized stators and the disk-type rotor along the axial direction; in each modularized stator, N same stator modules are spliced into a disk; each stator module comprise a stator core, five stator teeth and two centrally-wound windings; in the disk-type rotor, a disk surface on any side of the rotor core is provided with 2N+ / -2 permanent magnets magnetized oppositely and alternatively in the axial direction.

The invention relates to the loudspeaker box system technology field and especially relates to a vibration reduction loudspeaker box system. A loudspeaker box body in the vibration reduction loudspeaker box system adopts an electromagnet to suspend a loudspeaker. A foot stand adopts a hollow column which is filled with a cast iron powder. And a top panel is made of a vibration reduction plate. The column, the top panel and a bottom panel are connected and fixed through spot welding. By using the loudspeaker box system, vibration is small and sound quality is good.

The invention belongs to the field of permanent magnet motors, and relates to a highly-modularized flat plate type multiphase permanent magnet linear motor. The problems that when a winding short circuit and other failures happen to a conventional multiphase permanent magnet linear motor, the failure isolation difficulty is large, and motor modular design difficulty is large due to the high interphase electromagnetic coupling degree are solved. The highly-modularized flat plate type multiphase permanent magnet linear motor comprises a stator and a permanent magnet rotor, the stator can be arranged on one or two sides of the permanent magnet rotor, and an air gap exists between the stator and the permanent magnet rotor. The stator is formed by assembling 2m stator modules. The stator modules are assembled to be in a flat plate shape in the axial direction. Each stator module comprises a stator iron core, an armature tooth, two fault-tolerant teeth and two concentrated windings. A one-phase module of the highly-modularized flat plate type multiphase permanent magnet linear motor is composed of two adjacent stator modules. The permanent magnet rotor is formed by assembling a permanent magnet and a rotor iron core, and the permanent magnet rotor can be of a surface-mounted structure or a Halbach structure or an axial magnetization structure and the like.

The invention relates to the field of hydraulic control, in particular to a connecting structure of an electromagnetic valve and the electromagnetic valve. The connecting structure of the electromagnetic valve is arranged on a valve element and a push-pull rod so as to connect the valve element and the push-pull rod; the connecting structure comprises a socket part and an inserting part, wherein the inserting part comprises at least two elastic pieces, and the inserting ends of the elastic pieces are provided with stopping parts; and the socket part is provided with locking parts matched withthe stopping parts, and the at least two elastic pieces are compressed and deformed to be inserted into the socket part and then bounced off, so that the stopping parts and the locking parts are mutually locked. In the prior art, the valve element and the push-pull rod are connected through a pin, which means a part is additionally arranged, so that connection operation becomes complex and the pincannot be completely prevented from falling off. According to the connecting structure of the electromagnetic valve, the above technical problems can be solved.

The invention, which belongs to the technical field of motor fittings, particularly relates to a rotor structure capable of improving a gap flux density waveform of a two-pole self-starting permanent-magnet motor. The rotor structure comprises a rotor iron core having a plurality of mouse case slots and permanent magnets installed in permanent-magnet slots. The permanent magnets under two poles employ three-segment type inverted-U-shaped magnetic circuit structures and each of the permanent magnets includes an intermediate-segment permanent magnet and two segments of side permanent magnets; air slots are formed between the two adjacent segments of permanent magnets; the three segments of permanent magnets are arranged in a left-right symmetric mode relative to the central lines of the intermediate-segment permanent magnets; and end portions, far away from mounting slots of the intermediate-segment permanent magnets, of mounting slots of the two segments of side permanent magnets are non-magnetic-conductive material filling parts. The whole rotor structure is in a left-right-symmetric mode relative to the central lines of the intermediate-segment permanent magnets and the rotor is installed at a rotating shaft. Therefore, the gap flux density waveform of the motor can be optimized. On the basis of sinusoidal processing of the gap flux density waveform of the motor, the harmonic contents in the air-gap field and the stator winding can be reduced, the counter-electromotive-force waveform can be optimized, the motor efficiency can be improved; and the motor torque pulsation can be reduced.

The invention belongs to the field of permanent magnet motors, and relates to a highly-modularized cylindrical multiphase permanent magnet linear motor. The problems that when a winding short circuit and other failures happen to a conventional multiphase permanent magnet linear motor, the failure isolation difficulty is large, and motor modular design difficulty is large due to the high interphase electromagnetic coupling degree are solved. The highly-modularized cylindrical multiphase permanent magnet linear motor comprises a stator and a permanent magnet rotor, the stator can be arranged inside or outside the permanent magnet rotor, and an air gap exists between the stator and the permanent magnet rotor. The stator is formed by assembling 2m stator modules. The stator modules are assembled to be cylindrical in the axial direction. Each stator module comprises a stator iron core, an armature tooth, two fault-tolerant teeth and two annular concentrated windings. A one-phase module of the highly-modularized cylindrical multiphase permanent magnet linear motor is composed of two adjacent stator modules. The permanent magnet rotor is formed by assembling a permanent magnet and a rotor iron core, and the permanent magnet rotor can be of a surface-mounted structure or a Halbach structure or an axial magnetization structure and the like.

The invention discloses a power display device, which comprises a casing and a detection body arranged in the casing, a display screen is arranged outside the casing, a plurality of buttons and detection heads are arranged at the lower end of the display screen, and a plurality of first springs and detection heads are arranged in the casing. The main body is connected, and the shell includes side seats and horizontal plates. The side seats are connected to the horizontal plates through several threaded rods. It is a heat dissipation component for absorbing heat inside the housing. By detecting the heat generated by the main body when it is working, the thermoelectric power generation block on the horizontal plate works, and then through the electric shock rod, contact block and wires, the dust collecting plates set on the connecting seat work to attract and collect the dust in the shell , to prevent dust from falling on the detection body; the heat in the housing is absorbed by the heat-absorbing liquid in the heat-absorbing box; the side seat and the horizontal plate are provided with magnetic isolation plates to prevent the magnetic field outside the housing from affecting the detection body.

The invention relates to the field of loudspeaker system technology and relates to a loudspeaker system. A loudspeaker of a loudspeaker body in the loudspeaker system is suspended by an electromagnet. Foot stands are of hollow stand columns filled with cast iron. Vibration attenuators are arranged on the foot stands. According to the invention, vibration is small and quality of given-out sound is quite high.