Abstract: A motor includes a rotor and a stator. The rotor comprises a rotating shaft and an impeller. The impeller couples with the rotating shaft and has a hub. The hub has an outer surface, an inner surface, a plurality of first through holes and a plurality of second through holes. The first through holes are disposed nearer the rotating shaft than the second through holes. The stator comprises a silicon steel sheet and a bearing assembly. The silicon steel sheet has an annular portion and a plurality of protruding portions. The rotating shaft couples with the bearing assembly and penetrates within an inner hole of the annular portion. Each protruding portion is extended outward from the annular portion and has an extending length. The distance between the first through hole and the nearest second through hole is in a range of 0.3 to 1.2 times of the extending length.

Abstract: It is described a metamaterial sound insulation device, with improved efficiency in dampening sound transmission across it compared to a traditional sound insulation device having comparable size and weight. The device is especially adapted for sound insulation in the automotive field.

Abstract: A compressor assembly having a high velocity muffler system which produces a particle-free compressor pump feed while reducing noise output from the compressor assembly during compressing operations. The high velocity muffler system is maintenance-free and comprises an inertia filter. The compressor assembly uses a method for producing a compressor pump feed and reducing noise during compressing operations by processing a gas through the high velocity muffler system which has an inertia filter and a muffler chamber to produce a compressor pump feed which can be compressed by a pump assembly.

Abstract: A dynamic acoustic jacket device and a dynamic acoustic jacket system, that includes a single piece of material folded into acoustic jacket for covering a lighting fixture, using locking devices or the cut away portion of the device, to quickly and easily install the acoustic jacket over suspension cables so that the acoustic jacket can be lowered and raised over the lighting fixture without the need to be attached thereto.

Abstract: A hearing device containing a housing enclosing a housing interior, and a loudspeaker for generating acoustic signals. In addition, the hearing device contains a damping element formed by a damping mat, which is interposed between the loudspeaker and a wall of the housing or a loudspeaker box. The damping mat contains at least one damping chamber filled with fluid.

Abstract: A silencer for installation in an air duct, in particular in a flat duct, having at least one sound-absorbing damping element extending essentially in a longitudinal direction (X), and having at least one holding device which accommodates the damping element at least in sections and has a fastening device for fixing the silencer in the air duct. An assembly comprising an air duct and such a silencer is further described.

Abstract: The present invention relates to an electric machine (1) having a rotor (3) and a stator (2), wherein the stator (2) and/or the rotor (3) has an electrical plug-in winding (4), which comprises a plurality of rigid insulated electrical conductor elements (5); the conductor elements (5) are arranged in grooves of the stator or of the rotor and their conductor ends (17) project out of the grooves; the conductor ends of the conductor elements (5) are each connected to conductor ends of other conductor elements (5) in order to form the electrical plug-in winding (4); the conductor elements (5) have an electrically insulating insulation sheath (9); characterized in that each conductor element (5) has a multiplicity of flexible fibres (8), in particular of a conductor strand of flexible fibres (8), made of carbon nanotubes or graphene and in that the insulation sheath (9) surrounds the multiplicity of fibres (8) like a hose and is designed in such a way that it gives the electrical conductor element (5) a rigid form

Abstract: Provided is a silencing member for an electrified vehicle, which can suitably reduce a narrow band sound generated by a motor or the like, can handle a plurality of frequencies, can prevent generation of a wind noise, and can be miniaturized and thinned.

Abstract: The present disclosure relates to the field of new energy, and provides a laminated busbar assembly, a motor controller, a drive assembly, and a vehicle. The laminated busbar assembly includes a main circuit board, a positive and a negative electrode connection plates, and a three-phase connection plate assembly, which are laminated in sequence. The positive and the negative electrode connection plates, and the three-phase connection plate assembly are each provided with pins arranged circumferentially. The present disclosure designs a laminated arrangement and an annular arrangement of pins, thereby improving the device integration and space utilization, effectively reducing the occupied space, and realizing high integration of the motor controller and the drive assembly.

Abstract: A fluid silencer includes: an expansion pipe disposed on a pipe through which a fluid containing noise sources flows and having an accommodation space therein; a viscous fluid received in the accommodation space; a noise introducing member disposed between the pipe and the expansion pipe to seal the accommodation space and allowing the noise sources to be introduced into the accommodation space therethrough; at least one partition member disposed in the accommodation space and dividing the accommodation space in a flow direction of the fluid; multiple baffle members disposed on one surface of the partition member and forming multiple sound absorbing spaces into which the noise sources introduced into the accommodation space are dispersedly introduced; and an elastic member disposed between the partition member and the baffle members and contracted/expanded by the viscous fluid entering/leaving the sound absorbing spaces as the noise sources are introduced into the sound absorbing spaces.

Abstract: A motor system includes a motor including a motor cover and a shaft of which a first end portion is exposed to an outside of the motor cover, a permanent magnet provided at the exposed first end portion of the shaft, and a rotation angle detector disposed at a periphery of the permanent magnet, and configured to detect a magnetic field change due to rotation of the permanent magnet during rotation of the shaft to detect a rotation angle of the motor.

Abstract: Disclosed herein is an acoustic metamaterial structure which can effectively reduce noise in a specific frequency range through formation of an acoustic bandgap, wherein the specific frequency range is determined by a periodic structure formed by an array of multiple unit cells. The acoustic metamaterial structure includes multiple first unit cells each including a first space having a first cross-sectional area and a second space disposed downstream of the first space in a flow direction of fluid to communicate with the first space, the second space having a second cross-sectional area larger than the first cross-sectional area, wherein the acoustic metamaterial structure reduces noise in a specific frequency range through formation of an acoustic bandgap, the specific frequency range being determined by a periodic structure formed by an array of the first space and the second space.

Abstract: A motor of the present invention includes a rotation shaft, blades provided at the rotation shaft, a holder having tubular members, a rotor, and a stator opposing the rotor in a radial direction of the rotor. The stator is fixed to the tubular members, the stator includes a magnetic body, a coil and a resin member, a part of the resin member enters into between windings of the coil, another part of the resin member forms a side surface of the stator, and another part of the resin member opposes the blades in an axial direction of the rotation shaft.

Abstract: An electric motor includes a motor winding interconnection for operating an electrosurgical instrument with exactly one motor platform that is designed to operate the motor at a first operating voltage and a second operating voltage different from the first operating voltage. The motor platform includes a circuit, preferably a delta circuit or a star circuit, formed in each case by three phases with a respective phase coil. At least one phase coil is formed from N>1 interconnected individual coils. At the first operating voltage, the N individual coils of each phase coil are connected in parallel. At the second operating voltage, the N individual coils of each phase coil are connected in series. At least one short-circuiting mechanism per phase coil switches over between the first and second operating voltage.

Abstract: In an aspect a method of manufacturing a ceiling panel is described. The method may include: combining a binding agent with plastic flakes; passing the plastic flakes and the binding agent to a lamination machine; applying a force to the binding agent and the plastic flakes using the lamination machine to create a plastic sheet; and adding a decorative ceiling treatment to a first side of the plastic sheet.

Abstract: Provided is a sheet-shape electrostatic sound pressure-electrical signal conversion device that is three-dimensionally deformable and has a low drive voltage. The sound pressure-electrical signal conversion device includes a polymer sheet sandwiched between a pair of electrodes facing each other, the polymer sheet is a dielectric film, at least one of the electrodes includes an insulating flexible substrate having a plurality of through-holes and a plurality of conductive fibers having one end fixed to the flexible substrate with a pressure sensitive adhesive, electrical conduction in an in-plane direction is formed by contact between the conductive fibers, the conductive fibers are vibrated by giving an electrical signal to the pair of electrodes or the conductive fibers are vibrated by receiving sound pressure to cause the pair of electrodes to output an electrical signal.

Abstract: A sound absorbing device includes an acoustic resonator with an opening and at least one fabric layer extending across the opening. The at least one fabric layer includes reversible actuatable liquid crystal elastomer (LCE) fibers such that an average pore size of the at least one fabric layer increases with decreasing temperature and decreases with increasing temperature. The sound absorbing device also includes at least one of a heater configured to heat the at least one fabric layer such that the average pore size of the at least one fabric decreases and a cooler configured to cool the at least one fabric layer such that the average pore size of the at least one fabric increases. And in some variations a controller configured to command the heater to heat to the at least one fabric layer and command the cooler to cool the at least one fabric layer is included.

Abstract: A suppressor having a body and a first connector half coupled to the body, wherein the first connector half includes a first component that includes at least one channel and a first surface; and wherein the body provides a second surface, wherein a gap between the first surface and the second surface defines at least one track; wherein the gun includes a second connector half comprising at least one protrusion, wherein the protrusion and channel have corresponding shapes that allow the protrusion to be inserted through the channel and into alignment with the track, wherein the first component may be rotated with respect to the protrusion and the body to bring the protrusion out of alignment with the channel so that the first and second surfaces clamp the protrusion to thereby secure the first connector half and second connector half with respect to each other.

Abstract: The invention relates to a stator of an electric machine, comprising:—a laminated stator core (3), which has a stator axis (2), comprises a plurality of stator teeth (5) and a plurality of stator slots (6) formed between the stator teeth (5), and is formed by a plurality of stacked stator laminations (4); and —electrical conductor elements (10), which run through the stator slots (6) of the laminated stator core (3) and are provided in order to form an electrical winding, more particularly a plug-in winding. In each of the stator slots (6), a slot insulator (11), more particularly a slot insulation paper, is provided in order to electrically insulate the conductor elements (10) from the laminated stator core (3). The stator laminations (4) each have a plurality of lamination teeth (7) and a lamination yoke (8), which connects the lamination teeth (7). The stator teeth (5) of the laminated stator core (3) are each formed by stacked lamination teeth (7) of the stator laminations (4).

Abstract: To provide a sound insulation sheet member which is excellent in sound insulation performance in a low frequency band and which has a compact configuration. A sound insulation sheet member 1 including a substrate 2 and a concavo-convex structure 3 placed on at least one surface of the substrate 2, in which the concavo-convex structure 3 is provided by repeatedly arranging a plurality of units each defined as a concavo-convex unit shape 4 including a linear convex portion 5, in one direction at substantially constant intervals on the surface of the substrate 2.