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

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, 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.