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

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 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.